Authors,Title,Year,Source title,Volume,Issue,Art. No.,Page start,Page end,Page count,Cited by,DOI,Link,Affiliations,Authors with affiliations,Abstract,Author Keywords,Index Keywords,bothKeywords,Correspondence Address,Editors,Publisher Address,Conference name,Conference location,Conference date,Publisher,ISSN,ISBN,CODEN,PubMed ID,Language of Original Document,Abbreviated Source Title,Document Type,Source,Subject,EID,duplicatedIn,country,emailHost,institution,institutionWithCountry,authorFull
"Vasconcellos, C.S.A., Galiote, N.A., Khan, N., Paredes-Salazar, E.A., Souza, M.L., Sasaki, K., Li, M., Lima, F.H.B.","1,10-Phenanthroline-Iron Complex-Derived Fe-N-C Electrocatalysts: Enhanced Oxygen Reduction Activity and Stability Through Synthesis Tuning",2025,CATALYSTS,15,9,821,,,16,1,10.3390/catal15090821,,"[Vasconcellos, Carlos S. A.; Galiote, Nelson A.; Khan, Nadeem; Paredes-Salazar, Enrique A.; Souza, Maykon L.; Lima, Fabio H. B.] Univ Sao Paulo, Sao Carlos Inst Chem, Ave Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP, Brazil; [Sasaki, Kotaro] Brookhaven Natl Lab, Chem Div, Upton, NY 11973 USA; [Li, Meng] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA",,"The development of electrocatalysts composed of earth-abundant elements is essential for advancing the commercial application of Proton Exchange Membrane Fuel Cells (PEMFC). Among these, single-atom electrocatalysts, such as Fe-N-C, show great promise for the oxygen reduction reaction (ORR). This study aims to improve the ORR activity and stability of Fe-N-C electrocatalysts by fine-tuning the straightforward 1,10-phenanthroline-iron complexation synthesis method. Key parameters, including iron-to-phenanthroline ratio, carbon powder surface area, and pyrolysis temperature were systematically varied to evaluate their influence on the resulting electrocatalysts. The findings of this study revealed that the electrocatalysts synthesized with 1,10-phenanthroline (Phen) and high-surface-area Black Pearls (BP) possessed much better ORR activity than electrocatalysts prepared by using Vulcan carbon (lower surface area). Interestingly, electrocatalysts prepared with BP, but with a non-bidentate nitrogen-containing ligand molecule, such as imidazole, showed a much poorer activity, as the resulting material predominantly consisted of inactive structures, such as encapsulated iron nanoparticles and iron oxide, as evidenced by HR-TEM, EXAFS, and XRD. Therefore, the results suggest that only the synergistic combination of the bidentate ligand phenanthroline (Phen) and the high-surface-area carbon support (BP) favored the formation of ORR-active Fe-N-C single-atom species upon pyrolysis. The study also unveiled a significant enhancement in electrocatalyst stability during accelerated durability tests (and air storage) as the pyrolysis temperature was increased from 700 to 1300 degrees C, albeit at the expense of ORR activity, likely resulting from the generation of iron particles. Pyrolysis at 1050 degrees C yielded the electrocatalyst with the most favorable balance of activity and stability in rotating disk measurements, while maintaining moderate durability under PEM fuel cell operation. The insights obtained in this study may guide the development of more active efficient and durable electrocatalysts, synthesized via a simple method using earth-abundant elements, for application in PEMFC cathodes.",oxygen reduction; Fe-N-C; single-atom; PEM fuel cell cathode; earth-abundant electrocatalysts,PERFORMANCE; CATALYSTS; CARBON; IMIDAZOLE; EVOLUTION; MEDIA,oxygen reduction;Fe-N-C;single-atom;PEM fuel cell cathode;earth-abundant electrocatalysts;PERFORMANCE;CATALYSTS;CARBON;IMIDAZOLE;EVOLUTION;MEDIA,fabiohbl@iqsc.usp.br,,"MDPI AG, Grosspeteranlage 5, CH-4052 BASEL, SWITZERLAND",,,,MDPI,,,,,English,CATALYSTS,Article,WoS,Chemistry,WOS:001579652600001,2-s2.0-105017376521,Brazil;United States,iqsc.usp.br,Univ Sao Paulo;Brookhaven Natl Lab,"Univ Sao Paulo, Brazil;Brookhaven Natl Lab, United States","Vasconcellos, Carlos S. A.; Galiote, Nelson A.; Khan, Nadeem; Paredes-Salazar, Enrique A.; Souza, Maykon L.; Sasaki, Kotaro; Li, Meng; Lima, Fabio H. B."
"Niu, H.T., Liu, Y., Huang, L., Cai, L.B., Xia, C.F., Qi, R.J., Mao, Y., Guo, W., Wang, Z.Y., Xia, B.Y.",1D Package-Integrated Platinum Catalyst with Robust Interactions for Enhanced Cathodic Oxygen Reduction,2025,ADVANCED FUNCTIONAL MATERIALS,35,37,2503111,,,9,3,10.1002/adfm.202503111,,"[Niu, Huiting; Huang, Lei; Cai, Lebin; Xia, Chenfeng; Guo, Wei; Xia, Bao Yu] Huazhong Univ Sci & Technol HUST, Sch Chem & Chem Engn, Hubei Key Lab Mat Chem & Serv Failure, Minist Educ,Key Lab Mat Chem Energy Convers & Stor, Wuhan 430074, Peoples R China; [Liu, Yan; Mao, Yu; Wang, Ziyun] Univ Auckland, Sch Chem Sci, Auckland 1010, New Zealand; [Huang, Lei] Natl Univ Singapore, Ctr Hydrogen Innovat, Singapore 117580, Singapore; [Qi, Ruijuan] East China Normal Univ, Dept Elect, MOE, Key Lab Polar Mat & Devices, Shanghai 200241, Peoples R China; [Xia, Bao Yu] Sungkyunkwan Univ SKKU, Ctr Next Generat Energy Mat, 2066 Seobu Ro, Suwon 16419, Gyeonggi Do, South Korea; [Xia, Bao Yu] Sungkyunkwan Univ SKKU, Sch Chem Engn, 2066 Seobu Ro, Suwon 16419, Gyeonggi Do, South Korea",,"Durable electrocatalysts and optimal ionomer distribution in cathode catalyst layer (CCL) are crucial for the efficiency and lifetime of proton exchange membrane fuel cells (PEMFCs), especially at high currents. This work presents a 1D package-integrated platinum (Pt) catalyst designed to optimize mass exchange and boost cathodic oxygen reduction reaction (ORR). The package-integrated Pt catalyst not only enhances the active site utilization, activity, and stability of Pt alloys but also optimizes the ionomer coverage and oxygen transport within the CCL. It shows superior performance with a mass activity of 1.33 A mgPt-1 and only a 12 mV decay in half-wave potential after 30 000 cycles. Additionally, it delivers impressive catalytic performance (320 mA cm-2 at 0.8 V), mass transport polarization (0.632 V at 2000 mA cm-2), and low oxygen transport resistance (0.03 s cm-1) in hydrogen-air fuel cells. This package-integrated catalyst with robust anti-ionomer interference and impressive transport capability is of great significance for designing efficient and long-lasting PEMFC cathodes.",fuel cells; metal-nitrogen-carbon (M & horbar;N & horbar;C); 1D; ORR; Pt alloy,FUEL-CELL; PERFORMANCE; ELECTROCATALYSTS; DURABILITY; NANOCARBON; COHP,fuel cells;metal-nitrogen-carbon (M & horbar;N & horbar;C);1D;ORR;Pt alloy;FUEL-CELL;PERFORMANCE;ELECTROCATALYSTS;DURABILITY;NANOCARBON;COHP,leihuang@nus.edu.sg; wguo@hust.edu.cn; ziyun.wang@auckland.ac.nz; byxia@hust.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1616-301X,,,,English,ADV FUNCT MATER,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:001461714800001,2-s2.0-105002210516,China;New Zealand;Singapore;South Korea,nus.edu.sg,Huazhong Univ Sci & Technol HUST;Univ Auckland;Natl Univ Singapore;East China Normal Univ;Sungkyunkwan Univ SKKU,"Huazhong Univ Sci & Technol HUST, China;Univ Auckland, New Zealand;Natl Univ Singapore, Singapore;East China Normal Univ, China;Sungkyunkwan Univ SKKU, South Korea","Niu, Huiting; Liu, Yan; Huang, Lei; Cai, Lebin; Xia, Chenfeng; Qi, Ruijuan; Mao, Yu; Guo, Wei; Wang, Ziyun; Xia, Bao Yu"
"Yang, S.T., Liu, X.L., Niu, F.Q., Wang, L.Y., Su, K.K., Liu, W.F., Dong, H.Y., Yue, H.Y., Yin, Y.H.",2D Single-Atom Fe-N-C Catalyst Derived from a Layered Complex as an Oxygen Reduction Catalyst for PEMFCs,2022,ACS APPLIED ENERGY MATERIALS,,,,,,9,23,10.1021/acsaem.2c01290,,"[Yang, Shuting; Liu, Xili; Wang, Luyan; Su, Keke; Dong, Hongyu; Yue, Hongyun; Yin, Yanhong] Henan Normal Univ, Sch Chem & Chem Engn, Xinxiang 453007, Peoples R China; [Yang, Shuting; Liu, Xili; Niu, Fuquan; Wang, Luyan; Su, Keke; Liu, Wenfeng; Dong, Hongyu; Yue, Hongyun; Yin, Yanhong] Collaborat Innovat Ctr Henan Prov Mot Power & Key, Xinxiang 453007, Peoples R China; [Niu, Fuquan; Liu, Wenfeng] Henan Normal Univ, Sch Phys, Xinxiang 453007, Peoples R China",,"Fe single-atom catalysts of oxygen reduction reaction (ORR) are restricted by the agglomeration during the synthesis process and inferior stability, especially in acidic conditions. An efficient synthesis strategy is urgently needed to alleviate these disadvantages. In this work, a two-dimensional (2D) single-atom Fe-N-C catalyst derived from a layered complex was designed and synthesized for the ORR. Fe single atoms dispersed on 2D hierarchical porous N-doped carbon nanosheets (Fe-N- C) were derived from a layered complex through the coordination of Fe3+ and benzidine hydrochloride. The unique 2D hierarchical porous nanosheets with a special edge effect can not only provide a large specific surface area and promote the mass transfer of ORR but also facilitate the affinity of Fe single atoms. Furthermore, the well-distributed Fe single atoms and Fe-N-x-C structure can increase the utilization rate of metal atoms and enhance the catalytic activity of materials. As expected, the catalyst shows superior ORR performance and excellent electrochemical stability.",oxygen reduction reaction; proton exchange membrane fuel cells; Fe-N-C single-atom catalysts; 2D nanosheets; coordination engineering,ACTIVE-SITES; NANOMATERIALS; PERFORMANCE,oxygen reduction reaction;proton exchange membrane fuel cells;Fe-N-C single-atom catalysts;2D nanosheets;coordination engineering;ACTIVE-SITES;NANOMATERIALS;PERFORMANCE,yyh3326439@foxmail.com,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2574-0962,,,,English,ACS APPL ENERG MATER,Article; Early Access,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000830807200001,2-s2.0-85136043654,China,foxmail.com,Henan Normal Univ;Collaborat Innovat Ctr Henan Prov Mot Power & Key,"Henan Normal Univ, China;Collaborat Innovat Ctr Henan Prov Mot Power & Key, China","Yang, Shuting; Liu, Xili; Niu, Fuquan; Wang, Luyan; Su, Keke; Liu, Wenfeng; Dong, Hongyu; Yue, Hongyun; Yin, Yanhong"
"Pakrieva, E., Hernandez-Ferrer, J., Martinez, G., Balas, F., Garcia-Bordeje, E., Anson-Casaos, A., Simonelli, L., Bartolome, F., Benito, A.M., Maser, W.K., Hueso, J.L., Santamaria, J.","3-component (N, Fe, Co) atomically dispersed ORR catalysts prepared by laser-driven decomposition of organic precursors",2025,Chemical Engineering Journal,526,,171198,,,,0,10.1016/j.cej.2025.171198,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105023134548&doi=10.1016%2Fj.cej.2025.171198&partnerID=40&md5=f00efadba968f30e6d63b3398ba3575a,"CSIC-UZA - Instituto de Nanociencia y Materiales de Aragón (INMA), Zaragoza, Zaragoza, Spain; Department of Chemical and Environmental Engineering, Universidad de Zaragoza, Zaragoza, Zaragoza, Spain; Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina, Madrid, Madrid, Spain; CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Centro Universitario de la Defensa de Zaragoza, Zaragoza, Spain; Instituto de Investigación Sanitaria Aragón (IISA), Zaragoza, Zaragoza, Spain; CELLS−ALBA Synchrotron, Barcelona, Spain; Department of Condensed Matter Physics, Universidad de Zaragoza, Zaragoza, Zaragoza, Spain; Escuela Politécnica Superior, Universidad de Zaragoza, Zaragoza, Zaragoza, Spain","Pakrieva, Ekaterina G., CSIC-UZA - Instituto de Nanociencia y Materiales de Aragón (INMA), Zaragoza, Zaragoza, Spain, Department of Chemical and Environmental Engineering, Universidad de Zaragoza, Zaragoza, Zaragoza, Spain, Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina, Madrid, Madrid, Spain; Hernández-Ferrer, Javier, CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Martínez, Gema, CSIC-UZA - Instituto de Nanociencia y Materiales de Aragón (INMA), Zaragoza, Zaragoza, Spain, Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina, Madrid, Madrid, Spain, Centro Universitario de la Defensa de Zaragoza, Zaragoza, Spain; Balas, F., CSIC-UZA - Instituto de Nanociencia y Materiales de Aragón (INMA), Zaragoza, Zaragoza, Spain, Department of Chemical and Environmental Engineering, Universidad de Zaragoza, Zaragoza, Zaragoza, Spain, Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina, Madrid, Madrid, Spain; García-Bordejé, Enrique, CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Ansón-Casaos, Alejandro, CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Simonelli, Laura, CELLS−ALBA Synchrotron, Barcelona, Spain; Bartolomé, Fernando, CSIC-UZA - Instituto de Nanociencia y Materiales de Aragón (INMA), Zaragoza, Zaragoza, Spain, Department of Condensed Matter Physics, Universidad de Zaragoza, Zaragoza, Zaragoza, Spain; Benito, Ana M., CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Maser, Wolfgang K., CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Hueso, José L., CSIC-UZA - Instituto de Nanociencia y Materiales de Aragón (INMA), Zaragoza, Zaragoza, Spain, Department of Chemical and Environmental Engineering, Universidad de Zaragoza, Zaragoza, Zaragoza, Spain, Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina, Madrid, Madrid, Spain, Instituto de Investigación Sanitaria Aragón (IISA), Zaragoza, Zaragoza, Spain, Escuela Politécnica Superior, Universidad de Zaragoza, Zaragoza, Zaragoza, Spain; Santamaria, Jesus M., CSIC-UZA - Instituto de Nanociencia y Materiales de Aragón (INMA), Zaragoza, Zaragoza, Spain, Department of Chemical and Environmental Engineering, Universidad de Zaragoza, Zaragoza, Zaragoza, Spain, Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina, Madrid, Madrid, Spain, Instituto de Investigación Sanitaria Aragón (IISA), Zaragoza, Zaragoza, Spain","The sluggish kinetics of the oxygen reduction reaction (ORR) remain a key bottleneck for the commercialization of proton exchange membrane fuel cells (PEMFCs), driving the search for efficient, non-precious metal catalysts. Herein, we present a laser-assisted pyrolysis strategy for the synthesis of nitrogen-doped carbon (NC) materials, both metal-free and containing atomically dispersed Fe and Co, using aerosolized phthalocyanine precursors and a near-instantaneous rapid decomposition under a high-energy laser beam, while preventing metal aggregation. A single-step post-synthetic thermal activation under an NH₃/N₂ atmosphere further tailors the textural and surface properties, without requiring ammonia co-feeding during laser pyrolysis, acid etching, or multiple treatments, marking a significant improvement over our previously reported single atom (Fe-N/C) protocols. The resulting Fe_Co/NC_tr catalyst exhibits high specific surface area, enhanced microporosity, improved graphitization, and increased abundance of electrochemically beneficial nitrogen sites. Compared to our earlier reported Fe–N/C catalysts, Fe_Co/NC_tr delivers significantly higher limiting current densities and enhanced durability in alkaline media. Overall, the developed Fe_Co/NC catalyst exhibits good ORR catalytic activity and outstanding long-term stability in alkaline media, comparable to the state-of-the-art commercial Pt/C catalysts. Cyanide poisoning tests confirm the essential role of atomically dispersed Fe2+ and Co2+ as active ORR sites. © 2025 The Authors",Activation treatment; Atomically dispersed metals; Laser pyrolysis; N-doped carbon; Oxygen reduction reaction (ORR),Alkalinity; Ammonia; Atom lasers; Carbon; Catalyst activity; Catalyst poisoning; Doping (additives); Electrolytic reduction; High energy lasers; Laser beams; Nitrogen; Organic lasers; Pyrolysis; Reaction kinetics; Activation treatment; Atomically dispersed metal; Dispersed metals; Doped carbons; Laser pyrolysis; N-doped; N-doped carbon; Nitrogen-doped carbons; Oxygen reduction reaction; Chemical activation,Activation treatment;Atomically dispersed metals;Laser pyrolysis;N-doped carbon;Oxygen reduction reaction (ORR);Alkalinity;Ammonia;Atom lasers;Carbon;Catalyst activity;Catalyst poisoning;Doping (additives);Electrolytic reduction;High energy lasers;Laser beams;Nitrogen;Organic lasers;Pyrolysis;Reaction kinetics;Atomically dispersed metal;Dispersed metals;Doped carbons;N-doped;Nitrogen-doped carbons;Oxygen reduction reaction;Chemical activation,"E. Pakrieva; Instituto de Nanociencia y Materiales de Aragon (INMA) CSIC-Universidad de Zaragoza, Campus Rio Ebro, Zaragoza, Edificio I+D, C/ Poeta Mariano Esquillor, s/n, 50018, Spain; email: epakrieva@unizar.es",,,,,,Elsevier B.V.,13858947,,CMEJA,,English,Chem. Eng. J.,Article,Scopus,,2-s2.0-105023134548,,Spain,unizar.es,,,"Pakrieva, E.; Hernandez-Ferrer, J.; Martinez, G.; Balas, F.; Garcia-Bordeje, E.; Anson-Casaos, A.; Simonelli, L.; Bartolome, F.; Benito, A.M.; Maser, W.K.; Hueso, J.L.; Santamaria, J."
"Vasile, N.S., Doherty, R., Monteverde, A.H.A., Specchia, S.",3D multi-physics modeling of a gas diffusion electrode for oxygen reduction reaction for electrochemical energy conversion in PEM fuel cells,2016,Applied Energy,175,,,435,450,,24,10.1016/j.apenergy.2016.04.030,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84963960282&doi=10.1016%2Fj.apenergy.2016.04.030&partnerID=40&md5=afedeb7c0f083916676961043ae3fa7f,"Department of Applied Science and Technology, Politecnico di Torino, Turin, TO, Italy; Department of Chemical and Process Engineering, University of Strathclyde, Glasgow, Scotland, United Kingdom","Vasile, Nicolò S., Department of Applied Science and Technology, Politecnico di Torino, Turin, TO, Italy; Doherty, Ronan, Department of Chemical and Process Engineering, University of Strathclyde, Glasgow, Scotland, United Kingdom; Monteverde, Alessandro Hugo Antonio, Department of Applied Science and Technology, Politecnico di Torino, Turin, TO, Italy; Specchia, Stefania, Department of Applied Science and Technology, Politecnico di Torino, Turin, TO, Italy","A 3D multi-physics, multi-component and not isothermal model is developed to analyze the effects of catalyst structures on the performance of a gas diffusion electrode (GDE) cell toward the oxygen reduction reaction using dry oxygen as a reactant. The model includes Stokes–Brinkman, Maxwell–Stefan, and modified Butler–Volmer equations for simulating the performance of the GDE cell, solved by Comsol® Multiphysics v4.4a platform. The model is validated against experimental data, showing congruent and convergent responses for different electrodes based on noble and non-noble metals catalysts, confirming the accuracy of the model and the equations applied. The use of a 3D model incorporating porous materials can be used for evaluating mass transport and diffusivity parameters of the electrocatalyst, identifying the controlling variable in the process. The model can be used as an optimization tool for further improvement of catalyst synthesis, suggesting which properties can be tuned to improve the overall performance in the catalyst design phase. © 2016 Elsevier Ltd",3D multi-physics modeling; Electrochemical energy conversion; Fe–N–C catalyst; Gas diffusion electrode; Oxygen reduction reaction; Pt catalyst,Catalysts; Diffusion; Diffusion in gases; Electrocatalysts; Electrodes; Electrolytic reduction; Energy conversion; Fuel cells; Maxwell equations; Oxygen; Porous materials; Proton exchange membrane fuel cells (PEMFC); Reduction; Electrochemical energy conversions; Gas diffusion electrodes; Multi-physics modeling; Oxygen reduction reaction; Pt catalysts; Electrochemical electrodes; catalyst; electrochemical method; electrode; equipment; fuel cell; gas phase reaction; isotherm; mass transport; model validation; numerical model; oxygen; performance assessment; platinum; reduction; three-dimensional modeling,3D multi-physics modeling;Electrochemical energy conversion;Fe–N–C catalyst;Gas diffusion electrode;Oxygen reduction reaction;Pt catalyst;Catalysts;Diffusion;Diffusion in gases;Electrocatalysts;Electrodes;Electrolytic reduction;Energy conversion;Fuel cells;Maxwell equations;Oxygen;Porous materials;Proton exchange membrane fuel cells (PEMFC);Reduction;Electrochemical energy conversions;Gas diffusion electrodes;Multi-physics modeling;Pt catalysts;Electrochemical electrodes;catalyst;electrochemical method;electrode;equipment;fuel cell;gas phase reaction;isotherm;mass transport;model validation;numerical model;performance assessment;platinum;three-dimensional modeling,"S. Specchia; Politecnico di Torino, Department of Applied Science and Technology, Torino, Corso Duca degli Abruzzi 24, 10129, Italy; email: stefania.specchia@polito.it",,,,,,Elsevier Ltd,03062619,,APEND,,English,Appl. Energy,Article,Scopus,,2-s2.0-84963960282,,Italy;United Kingdom,polito.it,,,"Vasile, N.S.; Doherty, R.; Monteverde, A.H.A.; Specchia, S."
"Chisaka, M., Ando, Y., Yamamoto, Y., Itagaki, N.",A Carbon-Support-Free Titanium Oxynitride Catalyst for Proton Exchange Membrane Fuel Cell Cathodes,2016,ELECTROCHIMICA ACTA,214,,,165,172,8,31,10.1016/j.electacta.2016.08.032,,"[Chisaka, Mitsuharu; Ando, Yuta; Yamamoto, Yusuke; Itagaki, Noriaki] Hirosaki Univ, Dept Elect & Informat Technol, 3 Bunkyo Cho, Hirosaki, Aomori 0368561, Japan; [Chisaka, Mitsuharu] Hirosaki Univ, Dept Sustainable Energy, 3 Bunkyo Cho, Hirosaki, Aomori 0368561, Japan",,"Cathode catalysts without platinum group metals (PGMs) or carbon supports can reduce the price of proton exchange membrane fuel cells in automobiles, making them commercially competitive. In this paper, an inexpensive and PGM-free catalyst-amorphous nitrogen-doped TiO2-shell on TiN-core-was synthesized without carbon support. While existing PGM-free all-oxide catalysts without carbon support have shown moderate current densities (at the order of mu A/cm(2)), the current density of this new catalyst is three orders of magnitude higher. Replacing commercial carbon support by hydrothermally synthesized Ti4O7 significantly enhanced the activity to be close to that of carbon -supported platinum. Although its conductivity and surface area were not sufficient for an accurate evaluation of its activity, these new results demonstrate the possibility of high-performance non-PGM catalysts without carbon supports. (C) 2016 Elsevier Ltd. All rights reserved.",ORR; TiO2; rutile; amorphous,OXYGEN REDUCTION REACTION; RAMAN-SPECTRA; BAND-GAP; NITROGEN; OXIDE; PERFORMANCE; TIO2; IRON; ELECTROCATALYSTS; FABRICATION,ORR;TiO2;rutile;amorphous;OXYGEN REDUCTION REACTION;RAMAN-SPECTRA;BAND-GAP;NITROGEN;OXIDE;PERFORMANCE;IRON;ELECTROCATALYSTS;FABRICATION,chisaka@hirosaki-u.ac.jp,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000383827900019,2-s2.0-84981297803,Japan,hirosaki-u.ac.jp,Hirosaki Univ,"Hirosaki Univ, Japan","Chisaka, Mitsuharu; Ando, Yuta; Yamamoto, Yusuke; Itagaki, Noriaki"
"Malko, D., Lopes, T., Ticianelli, E.A., Kucernak, A.",A catalyst layer optimisation approach using electrochemical impedance spectroscopy for PEM fuel cells operated with pyrolysed transition metal-N-C catalysts,2016,Journal of Power Sources,323,,,189,200,,50,10.1016/j.jpowsour.2016.05.035,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84969497962&doi=10.1016%2Fj.jpowsour.2016.05.035&partnerID=40&md5=a6c7759903f2472db0df2ca98a12938d,"Department of Chemistry, Imperial College London, London, United Kingdom; Instituto de Química de São Carlos, Universidade de São Paulo, Sao Paulo, SP, Brazil","Malko, Daniel, Department of Chemistry, Imperial College London, London, United Kingdom; Lopes, Thiago S.A., Instituto de Química de São Carlos, Universidade de São Paulo, Sao Paulo, SP, Brazil; Ticianelli, Edson Antonio, Instituto de Química de São Carlos, Universidade de São Paulo, Sao Paulo, SP, Brazil; Kucernak, A. R.J., Department of Chemistry, Imperial College London, London, United Kingdom",The effect of the ionomer to carbon (I/C) ratio on the performance of single cell polymer electrolyte fuel cells is investigated for three different types of non-precious metal cathodic catalysts. Polarisation curves as well as impedance spectra are recorded at different potentials in the presence of argon or oxygen at the cathode and hydrogen at the anode. It is found that a optimised ionomer content is a key factor for improving the performance of the catalyst. Non-optimal ionomer loading can be assessed by two different factors from the impedance spectra. Hence this observation could be used as a diagnostic element to determine the ideal ionomer content and distribution in newly developed catalyst-electrodes. An electrode morphology based on the presence of inhomogeneous resistance distribution within the porous structure is suggested to explain the observed phenomena. The back-pressure and relative humidity effect on this feature is also investigated and supports the above hypothesis. We give a simple flowchart to aid optimisation of electrodes with the minimum number of trials. © 2016 The Authors. Published by Elsevier B.V.,Electrochemical impedance spectroscopy; Ionomer to catalyst ratio; Nafion content; Non-precious metal catalysts; Oxygen reduction reaction,Carbon; Catalysts; Electrodes; Electrolytes; Electrolytic reduction; Fuel cells; Ionomers; Polyelectrolytes; Precious metals; Proton exchange membrane fuel cells (PEMFC); Solid solutions; Spectroscopy; Transition metals; Catalyst ratios; Electrode morphology; Nafion contents; Non-precious metal catalysts; Oxygen reduction reaction; Polymer electrolyte fuel cells; Relative humidity effects; Resistance distribution; Electrochemical impedance spectroscopy,Electrochemical impedance spectroscopy;Ionomer to catalyst ratio;Nafion content;Non-precious metal catalysts;Oxygen reduction reaction;Carbon;Catalysts;Electrodes;Electrolytes;Electrolytic reduction;Fuel cells;Ionomers;Polyelectrolytes;Precious metals;Proton exchange membrane fuel cells (PEMFC);Solid solutions;Spectroscopy;Transition metals;Catalyst ratios;Electrode morphology;Nafion contents;Polymer electrolyte fuel cells;Relative humidity effects;Resistance distribution,"A. Kucernak; Department of Chemistry, Imperial College London, South Kensington Campus, London, SW7 2AZ, United Kingdom; email: anthony@imperial.ac.uk",,,,,,Elsevier B.V.,03787753,0444894810,JPSOD,,English,J Power Sources,Article,Scopus,,2-s2.0-84969497962,,United Kingdom;Brazil,imperial.ac.uk,,,"Malko, D.; Lopes, T.; Ticianelli, E.A.; Kucernak, A."
"Wang, X.X., Swihart, M.T., Wu, G.","Achievements, challenges and perspectives on cathode catalysts in proton exchange membrane fuel cells for transportation",2019,NATURE CATALYSIS,2,7,,578,589,12,1071,10.1038/s41929-019-0304-9,,"[Wang, Xiao Xia; Swihart, Mark T.; Wu, Gang] Univ Buffalo State Univ New York Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA",,"Proton exchange membrane fuel cells can use hydrogen and air to power clean electric vehicles. However, technical barriers including high cost, limited lifetime and insufficient power density limit their broad applications. Advanced cathode catalysts for the kinetically-sluggish oxygen reduction reaction (ORR) in acidic media are essential for overcoming these barriers. Here, we highlight breakthroughs, challenges and future directions for both platinum group metal (PGM) and PGM-free ORR cathode catalysts. Among PGM catalysts, highly-ordered PtM intermetallic nanostructures exhibit enhanced activity and stability relative to PtM random alloys. Carbon supports, with optimal balance between graphitization degree and porosity, play an important role in enhancing overall performance. Among PGM-free catalysts, transition metal and nitrogen co-doped carbons (M-N-C) perform best. However, degradation at practical voltages (>0.6 V) still prevents their practical application. For all catalysts, translating intrinsic activity and stability into device performance requires electrodes with robust three-phase interfaces for effective charge and mass transfer.",,OXYGEN REDUCTION REACTION; ORDERED INTERMETALLIC NANOPARTICLES; PRECIOUS-METAL CATALYSTS; PARTICLE-SIZE; ACTIVE-SITES; CORE-SHELL; ENHANCED ACTIVITY; FEPT NANOPARTICLES; PLATINUM SURFACES; O-2 REDUCTION,OXYGEN REDUCTION REACTION;ORDERED INTERMETALLIC NANOPARTICLES;PRECIOUS-METAL CATALYSTS;PARTICLE-SIZE;ACTIVE-SITES;CORE-SHELL;ENHANCED ACTIVITY;FEPT NANOPARTICLES;PLATINUM SURFACES;O-2 REDUCTION,gangwu@buffalo.edu,,"MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND",,,,NATURE PUBLISHING GROUP,2520-1158,,,,English,NAT CATAL,Review,WoS,Chemistry,WOS:000474926000007,2-s2.0-85072126420,United States,buffalo.edu,Univ Buffalo State Univ New York Buffalo,"Univ Buffalo State Univ New York Buffalo, United States","Wang, Xiao Xia; Swihart, Mark T.; Wu, Gang"
"Guo, H., Zhang, P., Huang, S., Li, M., Sun, G., Li, J., Lin, Y., Liu, B., Pan, Y.",Achilles’ heel of single atom catalysts towards practical PEMFC application: Degradation mechanisms and regulatory strategies,2025,Nano Research Energy,4,1,e9120144,,,,9,10.26599/NRE.2024.9120144,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105002135550&doi=10.26599%2FNRE.2024.9120144&partnerID=40&md5=7b6a853de640c9ddc5818c1e80d95a19,"China University of Petroleum (East China), Qingdao, Shandong, China; College of Energy Storage Technology, Shandong University of Science and Technology, Qingdao, Shandong, China","Guo, Han, China University of Petroleum (East China), Qingdao, Shandong, China; Zhang, Peng, China University of Petroleum (East China), Qingdao, Shandong, China; Huang, Siying, China University of Petroleum (East China), Qingdao, Shandong, China; Li, Min, China University of Petroleum (East China), Qingdao, Shandong, China; Sun, Guangxun, China University of Petroleum (East China), Qingdao, Shandong, China; Li, Jiaye, China University of Petroleum (East China), Qingdao, Shandong, China; Lin, Yan, College of Energy Storage Technology, Shandong University of Science and Technology, Qingdao, Shandong, China; Liu, Bin, China University of Petroleum (East China), Qingdao, Shandong, China; Pan, Yuan, China University of Petroleum (East China), Qingdao, Shandong, China","Proton exchange membrane fuel cell (PEMFC) is deemed as an efficient and eco-friendly technology with high energy conversion rate and low start-up temperature. Large-scale commercialization of PEMFC, however, has been severely retarded by insufficient power, short life span and high costs of Pt-based catalysts. Substantial progress on cost-effective single-atom catalysts (SACs) have witnessed significant improvements of sluggish cathodic oxygen reduction reaction (ORR) and anodic hydrogen oxidation reaction (HOR) for PEMFC. Nevertheless, practical application of SACs is plagued by degradation issues even though numerous studies said that SACs are comparable or even surpass Pt/C catalysts. The resulting question, “What is the Achilles’ heel of SACs towards practical PEMFC application?” is herein the centerpiece of this review. Recent advanced development of SACs towards PEMFC devices, covering HOR and ORR is presented from fundamental insights to practical application. In view of the requirement for efficient PEMFC, the structure design and regulation of SACs are targeted to improve the performance and service life of PEMFC. This review points out the existing issues and design principles of SACs, which are expected to pave the way for efficient PEMFC application. © The Author(s) 2025.",degradation mechanism; fuel cell; regulatory strategy; single-atom catalysts,Bioremediation; Electrolytic reduction; Energy efficiency; Hydrolysis; Oxygen reduction reaction; Platinum alloys; Achilles' heel; Degradation mechanism; Fuel cell application; Hydrogen oxidation reaction; Proton-exchange membranes fuel cells; Regulatory strategy; Single-atom catalyst; Single-atoms; ]+ catalyst; Anodic oxidation,degradation mechanism;fuel cell;regulatory strategy;single-atom catalysts;Bioremediation;Electrolytic reduction;Energy efficiency;Hydrolysis;Oxygen reduction reaction;Platinum alloys;Achilles' heel;Fuel cell application;Hydrogen oxidation reaction;Proton-exchange membranes fuel cells;Single-atom catalyst;Single-atoms;]+ catalyst;Anodic oxidation,"P. Zhang; State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, China; email: zpeng.sdu@foxmail.com; Y. Lin; College of Energy Storage Technology, Shandong University of Science and Technology, Qingdao, 266590, China; email: linyan09@sdust.edu.cn; Y. Pan; State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, China; email: panyuan@upc.edu.cn",,,,,,Tsinghua University Press,27910091,,,,English,Nano. Res. Energy.,Review,Scopus,,2-s2.0-105002135550,,China,foxmail.com,,,"Guo, H.; Zhang, P.; Huang, S.; Li, M.; Sun, G.; Li, J.; Lin, Y.; Liu, B.; Pan, Y."
"Zhao, Y.S., Wan, J.W., Ling, C.Y., Wang, Y.L., He, H.Y., Yang, N.L., Wen, R., Zhang, Q.H., Gu, L., Yang, B.L., Xiang, Z.H., Chen, C., Wang, J.L., Wang, X., Wang, Y.C., Tao, H.B., Li, X.N., Liu, B., Zhang, S.J., Wang, D.",Acidic oxygen reduction by single-atom Fe catalysts on curved supports,2025,NATURE,644,8077,,,,10,33,10.1038/s41586-025-09364-6,,"[Zhao, Yasong; Wan, Jiawei; Yang, Nailiang; Wang, Dan] Chinese Acad Sci, Inst Proc Engn, State Key Lab Biopharmaceut Preparat & Delivery, Beijing, Peoples R China; [Zhao, Yasong; Wang, Dan] Shenzhen Univ, Coll Chem & Environm Engn, State Key Lab Intelligent Construction & Hlth Ope, Shenzhen, Peoples R China; [Ling, Chongyi; Wang, Jinlan] Southeast Univ, Sch Phys, Key Lab Quantum Mat & Devices, Minist Educ, Nanjing, Peoples R China; [Wang, Yanlei; He, Hongyan; Zhang, Suojiang] Chinese Acad Sci, Beijing Key Lab Ion Liquids Clean Proc, State Key Lab Multiphase Complex Syst, CAS Key Lab Green Proc & Engn,Inst Proc Engn, Beijing, Peoples R China; [Wen, Rui] Chinese Acad Sci, CAS Res Educ Ctr Excellence Mol Sci, Key Lab Mol Nanostruct & Nanotechnol, Inst Chem,Beijing Natl Lab Mol Sci, Beijing, Peoples R China; [Zhang, Qinghua] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing, Peoples R China; [Gu, Lin] Tsinghua Univ, Sch Mat Sci & Engn, Beijing, Peoples R China; [Yang, Bolong; Xiang, Zhonghua] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing, Peoples R China; [Chen, Chen] Tsinghua Univ, Dept Chem, Beijing, Peoples R China; [Wang, Xin; Liu, Bin] City Univ Hong Kong, Dept Chem, Hong Kong, Peoples R China; [Wang, Yucheng; Tao, Huabing] Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen, Peoples R China; [Li, Xuning] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian, Peoples R China; [Liu, Bin] City Univ Hong Kong, Hong Kong Inst Clean Energy HKICE, Dept Mat Sci & Engn, Hong Kong, Peoples R China; [Liu, Bin] City Univ Hong Kong, Ctr Super Diamond & Adv Films COSDAF, Hong Kong, Peoples R China",,"Developing highly active and durable electrocatalysts for cost-effective proton-exchange membrane fuel cells is challenging1, 2-3. Fe/N-C catalysts are among the most promising alternatives to the platinum group metal catalysts, but their activity and durability still cannot meet the performance criteria due to the strong adsorption of oxygenated reaction intermediates and the demetallization of Fe species caused by the Fenton reaction4, 5, 6, 7-8. Here we design and develop a new type of Fe/N-C catalyst that is composed of numerous nanoprotrusions dispersed on two-dimensional carbon layers with single Fe-atom sites primarily embedded within the inner curved surface of the nanoprotrusions. The graphitized outer carbon layer of the nanoprotrusions can not only effectively weaken the binding strength of the oxygenated reaction intermediates, but also reduce the hydroxyl radical production rate. As a result, the Fe/N-C catalyst delivers one of the best-performing platinum group metal-free proton-exchange membrane fuel cell performances, achieving a record high power density of 0.75 W cm-2 under 1.0 bar H2-air with 86% activity retention after more than 300 hours of continuous operation.",,ACTIVE-SITES; MXAN; ORR,ACTIVE-SITES;MXAN;ORR,xiangzh@mail.buct.edu.cn; jlwang@seu.edu.cn; bliu48@cityu.edu.hk; sjzhang@ipe.ac.cn; danwang@szu.edu.cn,,"HEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY",,,,NATURE PORTFOLIO,0028-0836,,,40804521,English,NATURE,Article,WoS,Science & Technology - Other Topics,WOS:001549651500001,2-s2.0-105013359893,China,mail.buct.edu.cn,Chinese Acad Sci;Shenzhen Univ;Southeast Univ;Tsinghua Univ;Beijing Univ Chem Technol;City Univ Hong Kong;Xiamen Univ,"Chinese Acad Sci, China;Shenzhen Univ, China;Southeast Univ, China;Tsinghua Univ, China;Beijing Univ Chem Technol, China;City Univ Hong Kong, China;Xiamen Univ, China","Zhao, Yasong; Wan, Jiawei; Ling, Chongyi; Wang, Yanlei; He, Hongyan; Yang, Nailiang; Wen, Rui; Zhang, Qinghua; Gu, Lin; Yang, Bolong; Xiang, Zhonghua; Chen, Chen; Wang, Jinlan; Wang, Xin; Wang, Yucheng; Tao, Huabing; Li, Xuning; Liu, Bin; Zhang, Suojiang; Wang, Dan"
"Holby, E.F., Wang, G., Zelenay, P.",Acid stability and demetalation of PGM-free ORR electrocatalyst structures from density functional theory: A model for “single-atom catalyst” dissolution,2020,ACS Catalysis,10,24,,14527,14539,,160,10.1021/acscatal.0c02856,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097746289&doi=10.1021%2Facscatal.0c02856&partnerID=40&md5=a9a1e19304cc341a9c5646f1b7214af6,"Sigma Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Swanson School of Engineering, Pittsburgh, PA, United States; Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States","Holby, Edward F., Sigma Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Wang, Guofeng, Swanson School of Engineering, Pittsburgh, PA, United States; Zelenay, Piotr S., Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States","Platinum group metal-free (PGM-free) materials based on pyrolyzed M−N−C precursors offer a promising approach to replacing rare and expensive platinum group metal-based oxygen reduction reaction (ORR) electrocatalysts in proton exchange fuel cells (PEFCs). A major issue, however, is the stability of these materials in acidic environments and at potentials experienced in situ in PEFC cathodes and rotating disk electrode (RDE) experiments. Density functional theory (DFT)-based approaches have been valuable to understand how atomic scale structures couple to ORR activity. Little has been reported, however, on quantification of active site structure stability. This work proposes a set of DFT-accessible descriptors for M dissolution (demetalation) that directly address this need. Through the application of this approach to a specific Fe−N<inf>4</inf> bilayer graphene-hosted active site structure, the roles of the environment (pH and potential), ORR intermediates, and graphene underlayers are explored. Ranges of stability are reported and hypotheses explaining previously reported experimental behavior based on these findings are proposed. In particular, proposed are model implications for experimental trends in stability with respect to alkaline and acidic conditions; experimental trends for dissolution to occur below a given potential; and observed discrepancies in stability for materials in O<inf>2</inf>-bearing vs O<inf>2</inf>-purged environments. Based on these findings, suggestions for improving active site resistance to metal dissolution are provided. © 2020 American Chemical Society.",Corrosion; Degradation; Dissolution; Oxygen reduction reaction; PGM-free; Single-atom catalysis; Stability,Alkalinity; Density functional theory; Dissolution; Electrocatalysts; Electrodes; Electrolytic reduction; Graphene; Iron compounds; Platinum; Proton exchange membrane fuel cells (PEMFC); Stability; Acidic environment; Active site structure; Atomic scale structures; Metal dissolution; ORR electrocatalysts; Platinum group metals; Proton exchange fuel cells; Rotating disk electrodes; Oxygen reduction reaction,Corrosion;Degradation;Dissolution;Oxygen reduction reaction;PGM-free;Single-atom catalysis;Stability;Alkalinity;Density functional theory;Electrocatalysts;Electrodes;Electrolytic reduction;Graphene;Iron compounds;Platinum;Proton exchange membrane fuel cells (PEMFC);Acidic environment;Active site structure;Atomic scale structures;Metal dissolution;ORR electrocatalysts;Platinum group metals;Proton exchange fuel cells;Rotating disk electrodes,"E.F. Holby; Sigma Division, Los Alamos National Laboratory, Los Alamos, 87545, United States; email: holby@lanl.gov",,,,,,American Chemical Society,21555435,,ACCAC,,English,ACS Catal.,Article,Scopus,,2-s2.0-85097746289,,United States,lanl.gov,,,"Holby, E.F.; Wang, G.; Zelenay, P."
"Kneebone, J.L., Daifuku, S.L., Kehl, J.A., Wu, G., Chung, H.T., Hu, M.Y., Alp, E.E., More, K.L., Zelenay, P., Holby, E.F., Neidig, M.L.","A Combined Probe-Molecule, Mössbauer, Nuclear Resonance Vibrational Spectroscopy, and Density Functional Theory Approach for Evaluation of Potential Iron Active Sites in an Oxygen Reduction Reaction Catalyst",2017,Journal of Physical Chemistry C,121,30,,16283,16290,,78,10.1021/acs.jpcc.7b03779,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85026913564&doi=10.1021%2Facs.jpcc.7b03779&partnerID=40&md5=dd4e76ffa0e30b468bd242f9522f0177,"Department of Chemistry, University of Rochester, Rochester, NY, United States; Materials Physics and Applications Division, Los Alamos, NM, United States; Sigma Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Experimental Facilities Division, The Advanced Photon Source, Lemont, IL, United States; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States","Kneebone, Jared L., Department of Chemistry, University of Rochester, Rochester, NY, United States; Daifuku, Stephanie L., Department of Chemistry, University of Rochester, Rochester, NY, United States; Kehl, Jeffrey A., Department of Chemistry, University of Rochester, Rochester, NY, United States; Wu, Gang, Materials Physics and Applications Division, Los Alamos, NM, United States; Chung, Hoon Taek, Materials Physics and Applications Division, Los Alamos, NM, United States; Hu, Michael Yu, Experimental Facilities Division, The Advanced Photon Source, Lemont, IL, United States; Alp, Esen Ercan, Experimental Facilities Division, The Advanced Photon Source, Lemont, IL, United States; More, Karren L., Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Zelenay, Piotr S., Materials Physics and Applications Division, Los Alamos, NM, United States; Holby, Edward F., Sigma Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Neidig, Michael L., Department of Chemistry, University of Rochester, Rochester, NY, United States","Nonprecious metal M-N-C (M = Fe or Co) catalysts that are effective for the oxygen-reduction reaction in polymer-electrolyte fuel cells have been developed, but no consensus has yet been reached regarding the nature of the M sites in these heterogeneous catalysts that are responsible for the reaction with dioxygen (O<inf>2</inf>). While multiple studies have developed correlations between Fe distributions in as-prepared catalysts and ORR activity, the direct identification of sites reactive toward O<inf>2</inf> or O<inf>2</inf>-analogue molecules remains a significant challenge. In the present study, we demonstrate a new approach to identifying and characterizing potential Fe active sites in complex ORR catalysts that combines an effective probe molecule (NO<inf>(g)</inf>), Mössbauer spectroscopy, and nuclear resonance vibrational spectroscopy (NRVS) with density functional theory (DFT) calculations. Mössbauer spectroscopic studies demonstrate that NO<inf>(g)</inf> treatment of electrochemically reduced PANI-57Fe-C leads to a selective reaction with only a subset of the Fe species present. Nuclear resonance vibrational spectroscopic studies identified new Fe-ligand vibrations associated with the site reactive toward NO<inf>(g)</inf>. DFT calculations of the vibrational properties of a selection of previously proposed active-site structures suggest that graphene zigzag edge-hosted Fe-N structures may be responsible for the observed vibrational behavior with NO<inf>(g)</inf> probe molecules. Furthermore, such sites are likely also reactive to O<inf>2</inf>, possibly serving as the ORR active sites in the synthesized materials. (Graph Presented). © 2017 American Chemical Society.",,Catalysts; Density functional theory; Electrolytes; Electrolytic reduction; Fuel cells; Iron compounds; Molecules; Polyelectrolytes; Probes; Proton exchange membrane fuel cells (PEMFC); Reduction; Resonance; Site selection; Spectroscopic analysis; Vibrational spectroscopy; Active site structure; Direct identifications; Heterogeneous catalyst; Nuclear resonance vibrational spectroscopy; Oxygen reduction reaction; Polymer electrolyte fuel cells; Ssbauer spectroscopies; Vibrational properties; Catalyst activity,Catalysts;Density functional theory;Electrolytes;Electrolytic reduction;Fuel cells;Iron compounds;Molecules;Polyelectrolytes;Probes;Proton exchange membrane fuel cells (PEMFC);Reduction;Resonance;Site selection;Spectroscopic analysis;Vibrational spectroscopy;Active site structure;Direct identifications;Heterogeneous catalyst;Nuclear resonance vibrational spectroscopy;Oxygen reduction reaction;Polymer electrolyte fuel cells;Ssbauer spectroscopies;Vibrational properties;Catalyst activity,"P. Zelenay; Materials Physics and Applications Division, Los Alamos, 87545, United States; email: zelenay@lanl.gov",,,,,,American Chemical Society service@acs.org,19327447,,,,English,J. Phys. Chem. C,Article,Scopus,,2-s2.0-85026913564,,United States,lanl.gov,,,"Kneebone, J.L.; Daifuku, S.L.; Kehl, J.A.; Wu, G.; Chung, H.T.; Hu, M.Y.; Alp, E.E.; More, K.L.; Zelenay, P.; Holby, E.F.; Neidig, M.L."
"Li, L., Shen, S., Wei, G., Li, X., Yang, K., Feng, Q., Zhang, J.",A Comprehensive Investigation on Pyrolyzed Fe−N−C Composites as Highly Efficient Electrocatalyst toward the Oxygen Reduction Reaction of PEMFCs,2019,ACS Applied Materials and Interfaces,11,15,,14126,14135,,38,10.1021/acsami.8b22494,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85064839519&doi=10.1021%2Facsami.8b22494&partnerID=40&md5=8905e914ccbbc8b53bcb069f7263ec19,"School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; SJTU – Paris Elite Institute of Technology, Shanghai, China; Key Laboratory for Power Machinery and Engineering of Ministry of Education, Shanghai, China; Advanced Technology Department, SAIC, San Diego, CA, United States","Li, Lin, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; Shen, Shuiyuan Yun, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; Wei, Guanghua, SJTU – Paris Elite Institute of Technology, Shanghai, China; Li, Xiaolin, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; Yang, Kun, Advanced Technology Department, SAIC, San Diego, CA, United States; Feng, Qi, Advanced Technology Department, SAIC, San Diego, CA, United States; Zhang, Junliang, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China, Key Laboratory for Power Machinery and Engineering of Ministry of Education, Shanghai, China","There remain great challenges in exploring cost-effective and highly efficient non-noble metal electrocatalysts to catalyze the oxygen reduction reaction (ORR) of proton exchange membrane fuel cells (PEMFCs). Also, a further validation on their performances under a fuel cell operating condition draws sustained attention. Herein, we report a comprehensive investigation on the ORR performances of a series of pyrolyzed Fe−N−C composites that use phenanthrolene as the nitrogen precursor, and the effects of carbon supports, transition metal precursors, and annealing temperatures are examined in detail. Electrochemical measurements combined with different physicochemical characterizations are employed to clarify the function of critical structures including the specific surface area, microstructure, nitrogen content, nitrogen type, and corresponding proportion on their ORR and fuel cell performances. It demonstrates a half-wave potential of 0.79 V and almost a four-electron pathway. When using the as-optimized Fe−N−C composite as the cathode catalyst of a PEMFC, the maximum power density reaches as high as 540 mW cm−2 © 2019 American Chemical Society.",annealing temperature; Fe−N−C; non-noble metal electrocatalyst; oxygen reduction reaction; phenanthrolene as a nitrogen precursor,Cost effectiveness; Electrolytic reduction; Iron compounds; Nitrogen; Oxygen; Precious metals; Proton exchange membrane fuel cells (PEMFC); Annealing temperatures; Catalyse; Cost effective; Fe-N-C; Non-noble metal electrocatalyst; Operating condition; Oxygen reduction reaction; Performance; Phenanthrolene as a nitrogen precursor; Proton-exchange membranes fuel cells; Electrocatalysts,annealing temperature;Fe−N−C;non-noble metal electrocatalyst;oxygen reduction reaction;phenanthrolene as a nitrogen precursor;Cost effectiveness;Electrolytic reduction;Iron compounds;Nitrogen;Oxygen;Precious metals;Proton exchange membrane fuel cells (PEMFC);Annealing temperatures;Catalyse;Cost effective;Fe-N-C;Operating condition;Performance;Proton-exchange membranes fuel cells;Electrocatalysts,"J. Zhang; Institute of Fuel Cells, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; email: junliang.zhang@sjtu.edu.cn",,,,,,American Chemical Society,19448244,,,30932471,English,ACS Appl. Mater. Interfaces,Article,Scopus,,2-s2.0-85064839519,,China;United States,sjtu.edu.cn,,,"Li, L.; Shen, S.; Wei, G.; Li, X.; Yang, K.; Feng, Q.; Zhang, J."
"Menga, D., Ruiz-Zepeda, F., Moriau, L., Sala, M., Wagner, F., Koyuturk, B., Bele, M., Petek, U., Hodnik, N., Gaberscek, M., Fellinger, T.P.",Active-Site Imprinting: Preparation of Fe–N–C Catalysts from Zinc Ion–Templated Ionothermal Nitrogen-Doped Carbons,2019,Advanced Energy Materials,9,43,1902412,,,,74,10.1002/aenm.201902412,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85073928164&doi=10.1002%2Faenm.201902412&partnerID=40&md5=acaa5ed1e7358d8e213de927760959da,"Chair of Technical Electrochemistry, Technische Universität München, Munich, Bayern, Germany; Department of Materials Chemistry, National Institute of Chemistry Ljubljana, Ljubljana, Slovenia; Department of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry Ljubljana, Ljubljana, Slovenia; Department of Analytical Chemistry, National Institute of Chemistry Ljubljana, Ljubljana, Slovenia; Department of Physics, Technische Universität München, Munich, Bayern, Germany","Menga, Davide, Chair of Technical Electrochemistry, Technische Universität München, Munich, Bayern, Germany; Ruiz-Zepeda, Francisco, Department of Materials Chemistry, National Institute of Chemistry Ljubljana, Ljubljana, Slovenia; Moriau, Léonard Jean, Department of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry Ljubljana, Ljubljana, Slovenia; Šala, Martin, Department of Analytical Chemistry, National Institute of Chemistry Ljubljana, Ljubljana, Slovenia; Wagner, Friedrich Ernst, Department of Physics, Technische Universität München, Munich, Bayern, Germany; Koyutürk, Burak, Chair of Technical Electrochemistry, Technische Universität München, Munich, Bayern, Germany; Bele, Marjan, Department of Materials Chemistry, National Institute of Chemistry Ljubljana, Ljubljana, Slovenia; Petek, Urša, Department of Materials Chemistry, National Institute of Chemistry Ljubljana, Ljubljana, Slovenia; Hodnik, Nejc, Department of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry Ljubljana, Ljubljana, Slovenia; Gaberscek, Miran, Department of Materials Chemistry, National Institute of Chemistry Ljubljana, Ljubljana, Slovenia; Fellinger, Tim Patrick, Chair of Technical Electrochemistry, Technische Universität München, Munich, Bayern, Germany","Atomically dispersed Fe–N–C catalysts are considered the most promising precious-metal-free alternative to state-of-the-art Pt-based oxygen reduction electrocatalysts for proton-exchange membrane fuel cells. The exceptional progress in the field of research in the last ≈30 years is currently limited by the moderate active site density that can be obtained. Behind this stands the dilemma of metastability of the desired FeN<inf>4</inf> sites at the high temperatures that are believed to be a requirement for their formation. It is herein shown that Zn2+ ions can be utilized in the novel concept of active-site imprinting based on a pyrolytic template ion reaction throughout the formation of nitrogen-doped carbons. As obtained atomically dispersed Zn–N–Cs comprising ZnN<inf>4</inf> sites as well as metal-free N<inf>4</inf> sites can be utilized for the coordination of Fe2+ and Fe3+ ions to form atomically dispersed Fe–N–C with Fe loadings as high as 3.12 wt%. The Fe–N–Cs are active electocatalysts for the oxygen reduction reaction in acidic media with an onset potential of E<inf>0</inf> = 0.85 V versus RHE in 0.1 m HClO<inf>4</inf>. Identical location atomic resolution transmission electron microscopy imaging, as well as in situ electrochemical flow cell coupled to inductively coupled plasma mass spectrometry measurements, is employed to directly prove the concept of the active-site imprinting approach. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",active-site imprinting; Fe–N–C; PGM-free ORR electrocatalysts; template ion reaction; Zn–N–C,Catalyst activity; Cesium compounds; Doping (additives); Electrocatalysts; Electrolysis; Electrolytic reduction; High resolution transmission electron microscopy; Ions; Mass spectrometry; Nitrogen; Oxygen; Proton exchange membrane fuel cells (PEMFC); Zinc; Zinc compounds; Active site; Active site density; Atomic resolution; Electrochemical flow cells; Ion reactions; Nitrogen-doped carbons; ORR electrocatalysts; Oxygen reduction reaction; Iron compounds,active-site imprinting;Fe–N–C;PGM-free ORR electrocatalysts;template ion reaction;Zn–N–C;Catalyst activity;Cesium compounds;Doping (additives);Electrocatalysts;Electrolysis;Electrolytic reduction;High resolution transmission electron microscopy;Ions;Mass spectrometry;Nitrogen;Oxygen;Proton exchange membrane fuel cells (PEMFC);Zinc;Zinc compounds;Active site;Active site density;Atomic resolution;Electrochemical flow cells;Ion reactions;Nitrogen-doped carbons;ORR electrocatalysts;Oxygen reduction reaction;Iron compounds,"T.-P. Fellinger; Chair of Technical Electrochemistry, Department of Chemistry and Catalysis Research Center, Technische Universität München, Garching, Lichtenbergstraße 4, 85748, Germany; email: Tim.Fellinger@tum.de",,,,,,Wiley-VCH Verlag info@wiley-vch.de,16146832,,,,English,Adv. Energy Mater.,Article,Scopus,,2-s2.0-85073928164,,Germany;Slovenia,tum.de,,,"Menga, D.; Ruiz-Zepeda, F.; Moriau, L.; Sala, M.; Wagner, F.; Koyuturk, B.; Bele, M.; Petek, U.; Hodnik, N.; Gaberscek, M.; Fellinger, T.-P."
"Singh, K., Razmjooei, F., Yu, J.S.",Active sites and factors influencing them for efficient oxygen reduction reaction in metal-N coordinated pyrolyzed and non-pyrolyzed catalysts: a review,2017,JOURNAL OF MATERIALS CHEMISTRY A,5,38,,20095,20119,25,132,10.1039/c7ta05222g,,"[Singh, Kiranpal; Razmjooei, Fatemeh; Yu, Jong-Sung] DGIST, Dept Energy Sci & Engn, Daegu 42988, South Korea",,"With increasing demand for clean energy and approaching commercialization of polymer electrolyte membrane fuel cells (PEMFCs), replacing expensive Pt-based cathode catalysts with much cheaper non-precious metal (NPM) catalysts has become absolutely essential. This review highlights the parameters that have been considered vital to improving the overall performance of the NPM-based catalysts for oxygen reduction reaction (ORR). In the present review, we focus on well-known catalytic systems in three categories of NPM catalysts, i.e. biomimetic heme-copper oxidase enzymes, non-pyrolyzed/polymeric systems, and pyrolyzed NPM-nitrogen-doped carbon (M-N/C) (M = Fe, Ni, Co, etc.) catalysts. The ORR mechanism on the reported active sites and the effect of varying their local environments are considered and discussed in detail. Among all the catalysts, only pyrolyzed M-N/C catalysts have shown activity and stability much closer to that of the state-of-the-art commercial carbon-supported platinum (Pt/C) catalyst. Although great heights have been climbed in pyrolyzed M-N/C-based catalysts, still general consensuses need to be established regarding the active sites in the NMP-based M-N/C catalysts to help enhance the activity and stability of the catalytic system. By comparing the ORR mechanisms of the three studied systems, various similarities between the active sites are identified and reported comprehensively. On the basis of the information amassed, some future directions for improving the activity, selectivity, and durability of the NPM-based catalysts are also discussed.",,NITROGEN-DOPED CARBON; FE-BASED CATALYSTS; PEM FUEL-CELLS; HIGH-PERFORMANCE ELECTROCATALYSTS; DENSITY-FUNCTIONAL THEORY; HEAT-TREATMENT AFFECT; HIGH-AREA CARBON; TRANSITION-METAL; O-2 REDUCTION; IRON PHTHALOCYANINE,NITROGEN-DOPED CARBON;FE-BASED CATALYSTS;PEM FUEL-CELLS;HIGH-PERFORMANCE ELECTROCATALYSTS;DENSITY-FUNCTIONAL THEORY;HEAT-TREATMENT AFFECT;HIGH-AREA CARBON;TRANSITION-METAL;O-2 REDUCTION;IRON PHTHALOCYANINE,jsyu@dgist.ac.kr,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Review,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000412781700002,2-s2.0-85030679494,South Korea,dgist.ac.kr,DGIST,"DGIST, South Korea","Singh, Kiranpal; Razmjooei, Fatemeh; Yu, Jong-Sung"
"Yang, X., Huang, Z., Du, L., Li, Q., Ye, S.",Active Sites and Stability Study of Fe/N/C Catalyst in PEMFCs: A Decade of Stunning Progress and the Remaining Challenges,2024,ACS Catalysis,14,20,,15471,15488,,18,10.1021/acscatal.4c02871,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85205706061&doi=10.1021%2Facscatal.4c02871&partnerID=40&md5=085b812b6a45be7e3a4e03b6b2ad1c94,"School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong, China; Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Chongqing University, Chongqing, China","Yang, Xiaohua, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong, China, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Huang, Zhiyin, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong, China; Du, Lei, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong, China; Li, Qian, Chongqing University, Chongqing, China; Ye, Siyu, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong, China","Over the past few decades, Fe/N/C, as the most promising platinum group metal (PGM) alternative, has provided a unique roadmap for developing proton exchange membrane fuel cells (PEMFCs) due to the low-cost and earth-abundant elements. However, the high-performance Fe/N/C catalysts always demonstrate poor stability, especially during real-world fuel cell operation, which has attracted increased attention in recent years. Great efforts have been devoted in the past decade to understanding active sites and their degradation mechanisms. Herein, we review the progress in the past decade in terms of active site identification and degradation phenomena/mechanisms of Fe/N/C catalysts, particularly in PEMFCs (rather than the conventional three-electrode system). Meanwhile, we also highlight the latest advances in improving the stability of PGM-free catalysts. At the end of this critical review, perspectives are provided to determine the potential strategies to further improve the activity and stability of Fe/N/C catalysts for PEMFCs. © 2024 American Chemical Society.",active site; decay mechanism; Fe/N/C; PEMFCs; stability,Iron; Nafion membranes; Active site; Decay mechanisms; Fe/N/C; Low-costs; Performance; Platinum group metals; Proton-exchange membranes fuel cells; Roadmap; Stability study; ]+ catalyst; Degradation,active site;decay mechanism;Fe/N/C;PEMFCs;stability;Iron;Nafion membranes;Decay mechanisms;Low-costs;Performance;Platinum group metals;Proton-exchange membranes fuel cells;Roadmap;Stability study;]+ catalyst;Degradation,"L. Du; Huangpu Hydrogen Energy Innovation Center, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, China; email: lei.du@gzhu.edu.cn; Q. Li; National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; email: cquliqian@cqu.edu.cn; S. Ye; Huangpu Hydrogen Energy Innovation Center, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, China; email: siyu.ye@gzhu.edu.cn",,,,,,American Chemical Society,21555435,,ACCAC,,English,ACS Catal.,Review,Scopus,,2-s2.0-85205706061,,China;Canada,gzhu.edu.cn,,,"Yang, X.; Huang, Z.; Du, L.; Li, Q.; Ye, S."
"Li, X., Wang, D., Zha, S., Chu, Y., Pan, L., Wu, M., Liu, C., Wang, W., Mitsuzaki, N., Chen, Z.",Active sites identification and engineering of M-N-C electrocatalysts toward oxygen reduction reaction,2024,International Journal of Hydrogen Energy,51,,,1110,1127,,38,10.1016/j.ijhydene.2023.07.161,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85167819669&doi=10.1016%2Fj.ijhydene.2023.07.161&partnerID=40&md5=55e9636bf1281f4e28f1eb74aff22ccf,"School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, China; School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, China; Analysis and Testing Center, Changzhou University, Changzhou, Jiangsu, China; Osaka Metropolitan University, Osaka, Osaka, Japan","Li, Xiaosong, School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, China; Wang, Dan, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, China; Zha, Sujuan, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, China; Chu, Yuan, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, China; Pan, Lin, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, China; Wu, Minxian, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, China; Liu, Changhai, School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, China; Wang, Wenchang, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, China, Analysis and Testing Center, Changzhou University, Changzhou, Jiangsu, China; Mitsuzaki, Naotoshi, Osaka Metropolitan University, Osaka, Osaka, Japan; Chen, Zhidong, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, China","Zinc-air batteries (ZABs) and Proton exchange membrane fuel cells (PEMFCs) have attracted wide attention because of their high energy density. However, the oxygen reduction reaction (ORR) occurred at the cathode is 6 orders of magnitude lower than the oxidation reaction occurred at the anode. In recent years, atomically dispersed metal-nitrogen-carbon (M-N-C) catalyst has been widely considered as one of the most promising catalysts to replace platinum-based catalysts. However, the performance of M-N-C catalyst is much lower than that of the most advanced Pt catalysts. The key to improving the catalytic activity of M-N-C ORR catalysts is to increase the intrinsic activity of the catalyst active sites. In this paper, the active sites of atomically dispersed M-N-C ORR catalysts are introduced, and the strategies of enhancing the intrinsic activity of the active sites including heteroatom doping, construction of dual atoms sites and creation rich defects in carbon materials are systematically summarized. Finally, the opportunities and challenges of further development of atomically dispersed M-N-C catalysts are proposed. © 2023 Hydrogen Energy Publications LLC",Atomically dispersed M-N-C electrocatalysts; Intrinsic activity; Oxygen reduction reaction; Proton exchange membrane fuel cells,Carbon; Catalyst activity; Cell engineering; Electrodes; Electrolytic reduction; Oxygen; Proton exchange membrane fuel cells (PEMFC); Active site; Atomically dispersed metal-nitrogen-carbon electrocatalyst; Carbon catalysts; Dispersed metals; Intrinsic activities; Nitrogen-carbon; Oxygen reduction reaction; Proton-exchange membranes fuel cells; Site identification; ]+ catalyst; Electrocatalysts,Atomically dispersed M-N-C electrocatalysts;Intrinsic activity;Oxygen reduction reaction;Proton exchange membrane fuel cells;Carbon;Catalyst activity;Cell engineering;Electrodes;Electrolytic reduction;Oxygen;Proton exchange membrane fuel cells (PEMFC);Active site;Atomically dispersed metal-nitrogen-carbon electrocatalyst;Carbon catalysts;Dispersed metals;Intrinsic activities;Nitrogen-carbon;Proton-exchange membranes fuel cells;Site identification;]+ catalyst;Electrocatalysts,"Z. Chen; Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, 213164, China; email: zdchen@cczu.edu.cn; D. Wang; Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, 213164, China; email: danwang@cczu.edu.cn",,,,,,Elsevier Ltd,03603199,0080311393,IJHED,,English,Int J Hydrogen Energy,Review,Scopus,,2-s2.0-85167819669,,China;Japan,cczu.edu.cn,,,"Li, X.; Wang, D.; Zha, S.; Chu, Y.; Pan, L.; Wu, M.; Liu, C.; Wang, W.; Mitsuzaki, N.; Chen, Z."
"Leng, Y., Han, Q., Zhang, J., Lin, X., Xiang, Z.",Active-Sites-Integrated Hierarchical Porous Nanofibers for Improved Oxygen Reduction in Fuel Cells,2025,Small,21,30,2504253,,,,7,10.1002/smll.202504253,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105006819267&doi=10.1002%2Fsmll.202504253&partnerID=40&md5=27788f401a07b316d94728bb6e0fdff2,"State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China","Leng, Yiming, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Han, Qing, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Zhang, Jialiang, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Lin, Xinxin, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Xiang, Zhonghua, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China","M-N-C catalysts have emerged as a promising class of non-precious electrocatalysts for accelerating the kinetically sluggish oxygen reduction reaction (ORR). Nevertheless, their practical application in proton exchange membrane fuel cells (PEMFCs) faces significant challenges due to the complex reaction environment and stringent mass transport requirements, which place stringent demands on the structural design of electrocatalysts. Here, a strategy is proposed to construct a self-supporting membrane of zeolitic imidazolate framework-connected nanofibers, serving as an integrated substrate to cooperatively optimize active sites and mass transfer channels. The nanofiber-shaped electrocatalysts (Fe<inf>SA/AC</inf>-N-PCNFs) with hierarchical porous structure can achieve the anchor of well-dispersion atomically Fe-N<inf>4</inf> and Fe cluster. The Fe<inf>SA/AC</inf>-N-PCNFs, as a catalyst layer of cathode, to assemble PEMFC and realized 43% enhanced maximum power density compared with traditional spraying. The finite element simulation proved that the self-supported porous fiber structure effectively reduced the oxygen diffusion resistance in the electrode. This work established an effective enhancement strategy for the M-N-C electrocatalysts from the structure engineering, which opens new avenues for the design and manufacture of high-performance fuel cell electrocatalysts. © 2025 Wiley-VCH GmbH.",electrocatalysis; electrospinning; fuel Cell; hierarchical structure; oxygen reduction reaction,Cell engineering; Design for testability; Diffusion in liquids; Diffusion in solids; Mass transportation; Model structures; Nanofibers; Structural analysis; Structural dynamics; Active site; Cell faces; Hierarchical porous; Hierarchical structures; Oxygen Reduction; Oxygen reduction reaction; Porous nanofibers; Proton-exchange membranes fuel cells; Stringents; ]+ catalyst; Electrolytic reduction; nanofiber; oxygen; proton; article; catalyst; cathode electrode; controlled study; dispersion; drug development; electrocatalysis; electrode; electrospinning; finite element analysis; fuel; kinetics; membrane; oxygen diffusion; pharmaceutics; reduction (chemistry); therapy,electrocatalysis;electrospinning;fuel Cell;hierarchical structure;oxygen reduction reaction;Cell engineering;Design for testability;Diffusion in liquids;Diffusion in solids;Mass transportation;Model structures;Nanofibers;Structural analysis;Structural dynamics;Active site;Cell faces;Hierarchical porous;Hierarchical structures;Oxygen Reduction;Porous nanofibers;Proton-exchange membranes fuel cells;Stringents;]+ catalyst;Electrolytic reduction;nanofiber;oxygen;proton;article;catalyst;cathode electrode;controlled study;dispersion;drug development;electrode;finite element analysis;fuel;kinetics;membrane;oxygen diffusion;pharmaceutics;reduction (chemistry);therapy,"X. Lin; State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China; email: 2023700070@buct.edu.cn; Z. Xiang; State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China; email: xiangzh@mail.buct.edu.cn",,,,,,John Wiley and Sons Inc,16136810,,SMALB,40434261,English,Small,Article,Scopus,,2-s2.0-105006819267,,China,buct.edu.cn,,,"Leng, Y.; Han, Q.; Zhang, J.; Lin, X.; Xiang, Z."
"Dorjgotov, A., Ok, J., Jeon, Y., Yoon, S.H., Shul, Y.G.",Activity and active sites of nitrogen-doped carbon nanotubes for oxygen reduction reaction,2013,JOURNAL OF APPLIED ELECTROCHEMISTRY,43,4,,387,397,11,54,10.1007/s10800-012-0523-0,,"[Dorjgotov, Altansukh; Ok, Jinhee; Jeon, YuKwon; Shul, Yong Gun] Yonsei Univ, Dept Chem & Biomol Engn, Seoul 120749, South Korea; [Yoon, Seong-Ho] Kyushu Univ, Inst Mat Chem & Engn, Fukuoka 812, Japan",,"Nitrogen-doped carbon (CNx) nanotubes were synthesized by thermal decomposition of ferrocene/ethylenediamine mixture at 600-900 A degrees C. The effect of the temperature on the growth and structure of CNx nanotubes was studied by transmission electron microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy. With increasing growth temperature, the total nitrogen content of CNx nanotubes was decreased from 8.93 to 6.01 at.%. The N configurations were changed from pyrrolic-N to quaternary-N when increasing the temperature. Examination of the catalytic activities of the nanotubes for oxygen reduction reaction by rotating disk electrode measurements and single-cell tests shows that the onset potential for oxygen reduction in 0.5 M H2SO4 of the most effective catalyst (CNx nanotubes synthesized at 900 A degrees C) was 0.83 V versus the normal hydrogen electrode. A current density of 0.07 A cm(-2) at 0.6 V was obtained in an H-2/O-2 proton-exchange membrane fuel cell at a cathode catalyst loading of 2 mg cm(-2).",Nitrogen-doped carbon nanotubes; Thermal decomposition; Oxygen reduction reaction; Non-precious metal catalysts,REACTION TEMPERATURE; FUEL-CELLS; CATALYSTS; DECOMPOSITION; PYROLYSIS; COMPOSITE; MECHANISM,Nitrogen-doped carbon nanotubes;Thermal decomposition;Oxygen reduction reaction;Non-precious metal catalysts;REACTION TEMPERATURE;FUEL-CELLS;CATALYSTS;DECOMPOSITION;PYROLYSIS;COMPOSITE;MECHANISM,shulyg@yonsei.ac.kr,,"VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS",,,,SPRINGER,0021-891X,,,,English,J APPL ELECTROCHEM,Article,WoS,Electrochemistry,WOS:000315564300002,2-s2.0-84893131384,South Korea;Japan,yonsei.ac.kr,Yonsei Univ;Kyushu Univ,"Yonsei Univ, South Korea;Kyushu Univ, Japan","Dorjgotov, Altansukh; Ok, Jinhee; Jeon, YuKwon; Yoon, Seong-Ho; Shul, Yong Gun"
"Larouche, N., Chenitz, R., Lefevre, M., Proietti, E., Dodelet, J.P.",Activity and stability in proton exchange membrane fuel cells of iron-based cathode catalysts synthesized with addition of carbon fibers,2014,ELECTROCHIMICA ACTA,115,,,170,182,13,58,10.1016/j.electacta.2013.10.102,,"[Larouche, Nicholas; Chenitz, Regis; Dodelet, Jean-Pol] INRS EMT, Varennes, PQ J3X 1S2, Canada; [Lefevre, Michel; Proietti, Eric] Canet Electrocatalysis Inc, Varennes, PQ J3X 1S2, Canada",,"In this work, we report attempts to improve mass performance and durability of a catalyst prepared by ball milling a precursor consisting of a zinc-based zeolitic imidazolate framework (ZIF-8) mixed with 1,10-phenanthroline and ferrous acetate. The latter was then heat-treated at 1050 degrees C in argon to produce an oxygen reduction catalyst, identified as NC-Ar, for polymer electrolyte membrane fuel cells. Mass performance at 0.6 V of NC-Ar tested in either H-2/O-2 or H-2/Air remained unchanged after adding 26 wt% highly graphitized carbon fibers into its precursor, but its equivalent mass performance improved by 35% under these conditions. The catalyst produced after a heat-treatment at 1050 degrees C in argon of the carbon fiber-containing precursor is identified as NC-Ar (F90). The durability performance of NC-Ar (F90) over 100 h in H-2/Air is the same as that for NC-Ar. However, the durability performance of NC-Ar (F90) may be improved by performing a post-heat-treatment of NC-Ar (F90) with optimized temperature and duration. The best performing and most durable catalyst in this work is identified as NC-Ar (F90) + R985-1080 30 min. After 100 h in H-2/Air fuel cell operating at 80 degrees C and 2 bar absolute pressure, the latter produces about 0.5 A/cm(2) at 0.4 V (about 0.20 W/cm(2)), values that are higher than those (about 0.35 A/cm(2) at 0.4 V; or about 0.14 W/cm(2)) reported under similar experimental conditions (except for a higher absolute pressure of 2.8 bar) by Zelenay and collaborators (2011 [28]) for their most durable catalyst. (C) 2013 Elsevier Ltd. All rights reserved.",O-2 reduction; Oxygen reduction; PEM fuel cell; Electrocatalyst; Durability,OXYGEN REDUCTION REACTION; FE/N/C-CATALYSTS; ELECTROCATALYSTS; ELECTROLYTE; CHALLENGES; PYROLYSIS; PRECURSOR; FUTURE; COTMPP,O-2 reduction;Oxygen reduction;PEM fuel cell;Electrocatalyst;Durability;OXYGEN REDUCTION REACTION;FE/N/C-CATALYSTS;ELECTROCATALYSTS;ELECTROLYTE;CHALLENGES;PYROLYSIS;PRECURSOR;FUTURE;COTMPP,dodelet@emt.inrs.ca,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000331424300023,,Canada,emt.inrs.ca,INRS EMT;Canet Electrocatalysis Inc,"INRS EMT, Canada;Canet Electrocatalysis Inc, Canada","Larouche, Nicholas; Chenitz, Regis; Lefevre, Michel; Proietti, Eric; Dodelet, Jean-Pol"
"Lefevre, M., Jaouen, F., Chen, K., Li, X.H., Hay, A.S., Dodelet, J.P.",Activity for O2 reduction of heat-treated Fe/N/C catalysts prepared with carbon black modified by nitrogen-bearing functionalities,2006,ECS Transactions,3,1,,201,210,,5,10.1149/1.2356138,https://www.scopus.com/inward/record.uri?eid=2-s2.0-33847006880&doi=10.1149%2F1.2356138&partnerID=40&md5=2209f2c2f563aa83ce0209559d624145,"Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Department of Chemistry, Université McGill, Montreal, QC, Canada","Lefèvre, Michel, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Jaouen, Frédéric, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Chen, Ke, Department of Chemistry, Université McGill, Montreal, QC, Canada; Li, Xiuhua, Department of Chemistry, Université McGill, Montreal, QC, Canada; Hay, Allan S., Department of Chemistry, Université McGill, Montreal, QC, Canada; Dodelet, Jean Pol, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada","Fe/N/C catalysts for the reduction of oxygen under the acidic conditions prevailing in PEM fuel cells have been prepared on two carbon black supports functionalized with N-bearing groups. Once loaded with 2000 ppm Fe, the functionalized carbons were pyrolyzed at 950°C in Ar or NH<inf>3</inf>. The best catalysts were obtained under NH<inf>3</inf>. In addition to being a nitrogen precursor, NH<inf>3</inf> also etches the carbon support increasing its microporosity. In NH<inf>3</inf>, the functionalities are rapidly etched away from the carbon support, but this once-functionalized carbon now reacts faster with NH<inf>3</inf> than the pristine carbon. Therefore, the optimum microporosity necessary to produce the maximum catalytic activity is reached after a shorter pyrolysis time on the functionalized carbon supports than on the pristine carbons. However, the maximum catalytic activity for the oxygen reduction reaction (ORR) is the same for the once functionalized carbon as for the pristine one. copyright The Electrochemical Society.",,Carbon black; Catalysis; Etching; Fuel cells; Heat treatment; Iron; Microporosity; Nitrogen; Pyrolysis; Functionalized carbon; Oxygen reduction reaction (ORR); Pristine; Catalysts,Carbon black;Catalysis;Etching;Fuel cells;Heat treatment;Iron;Microporosity;Nitrogen;Pyrolysis;Functionalized carbon;Oxygen reduction reaction (ORR);Pristine;Catalysts,,,,Proton Exchange Membrane Fuel Cells 6 - 210th Electrochemical Society Meeting,,,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-33847006880,,Canada,No email,,,"Lefevre, M.; Jaouen, F.; Chen, K.; Li, X.H.; Hay, A.S.; Dodelet, J.-P."
"Yang, L.J., Larouche, N., Chenitz, R., Zhang, G.X., Lefevre, M., Dodelet, J.P.","Activity, Performance, and Durability for the Reduction of Oxygen in PEM Fuel Cells, of Fe/N/C Electrocatalysts Obtained from the Pyrolysis of Metal-Organic-Framework and Iron Porphyrin Precursors",2015,ELECTROCHIMICA ACTA,159,,,184,197,14,147,10.1016/j.electacta.2015.01.201,,"[Yang, Lijun; Larouche, Nicholas; Chenitz, Regis; Zhang, Gaixia; Dodelet, Jean-Pol] INRS Energie, Mat & Telecommun, Varennes, PQ J3X 1S2, Canada; [Lefevre, Michel] Canet Electrocatalysis, Varennes, PQ J3X 1S2, Canada",,"Fe/N/Ctype catalysts have been produced by ballmilling ZIF-8 (a metal-organic-framework) and a chloroiron-tetramethoxyporphyrin (ClFeTMPP). The resulting material was first pyrolyzed in Ar at temperatures ranging from 850 to 1150 degrees C, then in NH3 at 950 degrees C in order to produce two series of catalysts: the Ar and the Ar + NH3 ones. They were labeled NC Por_x-T Ar or NC Por_x-T Ar + NH3, where x is the nominal Fe loading in wt% and T is the temperature of the first pyrolysis in Ar. At 80 degrees C inH(2)/O-2 fuel cell, the most active and performing catalyst is NC Por_0.8-1050 Ar + NH3. All NC Por_0.8-T Ar + NH3 catalysts with T comprised between 850 and 1050 degrees C display the same instability behavior. The only catalyst showing an improvement in durability is NC Por_0.8-1150 Ar + NH3. It is proposed that the drastic change in durability upon increasing the first pyrolysis temperature, from 1050 to 1150 degrees C in Ar, is attributable to an important decrease in the heteroatom content (a drop of 32% for both N and O atoms) of the catalyst upon graphitization, reducing the hydrophilic character of its carbonaceous support and decreasing the possibility of water flooding its catalytic sites, particularly the sites located in micropores. (C) 2015 Elsevier Ltd. All rights reserved.",Catalyst; O-2 reduction; Proton Exchange Membrane Fuel Cell; ZIF-8; ClFeTMPP,CARBON COMPOSITE CATALYSTS; CATHODE CATALYST; NONPRECIOUS CATALYST; PORE DEVELOPMENT; SPECTROSCOPY; HEMOGLOBIN; STABILITY; SITES; ENHANCEMENT; CHEMISTRY,Catalyst;O-2 reduction;Proton Exchange Membrane Fuel Cell;ZIF-8;ClFeTMPP;CARBON COMPOSITE CATALYSTS;CATHODE CATALYST;NONPRECIOUS CATALYST;PORE DEVELOPMENT;SPECTROSCOPY;HEMOGLOBIN;STABILITY;SITES;ENHANCEMENT;CHEMISTRY,dodelet@emt.inrs.ca,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000350446400025,2-s2.0-84922363483,Canada,emt.inrs.ca,INRS Energie;Canet Electrocatalysis,"INRS Energie, Canada;Canet Electrocatalysis, Canada","Yang, Lijun; Larouche, Nicholas; Chenitz, Regis; Zhang, Gaixia; Lefevre, Michel; Dodelet, Jean-Pol"
"Wu, G., Zelenay, P.",Activity versus stability of atomically dispersed transition-metal electrocatalysts,2024,Nature Reviews Materials,9,9,,643,656,,82,10.1038/s41578-024-00703-z,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85200167861&doi=10.1038%2Fs41578-024-00703-z&partnerID=40&md5=78ccaed3d7d164aaf02b37e020ce1b29,"School of Engineering and Applied Sciences, Buffalo, NY, United States; Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States","Wu, Gang, School of Engineering and Applied Sciences, Buffalo, NY, United States; Zelenay, Piotr S., Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States","Polymer electrolyte fuel cells operating on clean and sustainable hydrogen are an attractive solution for clean transportation. However, polymer electrolyte fuel cells are costly owing to the use of considerable amounts of platinum group metal (PGM) catalysts, which are needed to catalyse the very slow oxygen reduction reaction at the cathode. The most attractive path in that regard is a complete replacement of precious metal catalysts by PGM-free materials with similar or better performance. Since 2010, numerous promising catalysts have been proposed for PGM-free electrocatalysis. However, the best-performing catalysts do not yet meet the requirements of practical systems. One important hurdle in catalyst discovery is relying heavily on empirical rather than rational design-based approaches. This Perspective article focuses on the most promising PGM-free oxygen reduction reaction catalysts based on atomically dispersed, nitrogen-coordinated single-atom metal sites (M–N–C catalysts). We specifically concentrate on the active-site structure and critical factors governing catalytic activity and performance durability. We propose potentially effective strategies for improving performance by controlling the catalyst structure at the atomic scale, mesoscale and nanoscale. We highlight the importance of overcoming often-observed activity–stability trade-offs and the importance of advanced modelling for the rational design of catalysts. © Springer Nature Limited 2024.",,Catalyst activity; Coordination reactions; Economic and social effects; Electrocatalysts; Electrolytic reduction; Oxygen; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Transition metals; Attractive solutions; Cell-be; Cell/B.E; Cell/BE; Metal free; Oxygen reduction reaction; Platinum group metals; Polymer electrolyte fuel cells; Rational design; ]+ catalyst; Electrocatalysis,Catalyst activity;Coordination reactions;Economic and social effects;Electrocatalysts;Electrolytic reduction;Oxygen;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Solid electrolytes;Transition metals;Attractive solutions;Cell-be;Cell/B.E;Cell/BE;Metal free;Oxygen reduction reaction;Platinum group metals;Polymer electrolyte fuel cells;Rational design;]+ catalyst;Electrocatalysis,"P. Zelenay; Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, United States; email: zelenay@lanl.gov",,,,,,Nature Research,,,,,English,Nat. Rev. Mater.,Article,Scopus,,2-s2.0-85200167861,,United States,lanl.gov,,,"Wu, G.; Zelenay, P."
"Kort-Kamp, W.J.M., Ferrandon, M., Wang, X., Park, J.H., Malla, R.K., Ahmed, T., Holby, E.F., Myers, D.J., Zelenay, P.",Adaptive learning-driven high-throughput synthesis of oxygen reduction reaction Fe–N–C electrocatalysts,2023,Journal of Power Sources,559,,232583,,,,22,10.1016/j.jpowsour.2022.232583,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85146290715&doi=10.1016%2Fj.jpowsour.2022.232583&partnerID=40&md5=6f2306a03674f9c6e1ad37a71ac34b2b,"Los Alamos National Laboratory Theoretical Division, Los Alamos, NM, United States; Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Brookhaven National Laboratory Condensed Matter Physics and Materials Science Department, Upton, NY, United States; Pacific Northwest National Laboratory, Richland, WA, United States; Sigma Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States","Kort-Kamp, Wilton J.M., Los Alamos National Laboratory Theoretical Division, Los Alamos, NM, United States; Ferrandon, Magali S., Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Wang, Xiaoping, Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Park, Jaehyung, Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Malla, Rajesh K., Brookhaven National Laboratory Condensed Matter Physics and Materials Science Department, Upton, NY, United States; Ahmed, Towfiq, Pacific Northwest National Laboratory, Richland, WA, United States; Holby, Edward F., Sigma Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Myers, Deborah J., Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Zelenay, Piotr S., Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States","Reducing human reliance on inefficient energy systems and fossil fuels has become more urgent due to the consequences of global climate change. However, traditional trial-and-error approaches have hampered our ability to accelerate the discovery and implementation of functional materials for efficient energy conversion devices, such as polymer electrolyte fuel cells (PEFCs). To address this, we develop an adaptive learning framework that integrates machine learning and state-of-the-art capabilities in high-throughput synthesis to achieve expedited optimization of iron-nitrogen-carbon PEFC oxygen reduction reaction (ORR) electrocatalysts. We use statistical inference, uncertainty quantification, and global optimization to build a computational design-of-experiment tool that identifies the optimum compositions to be investigated next to reduce the demands placed on experimental materials discovery. We benchmark the ability of the proposed strategy to discover optimum catalyst synthesis conditions in a six-dimensional search space when starting with a thirty-six-sample database. By following the adaptive learning strategy, we synthesize fourteen new catalysts from approximately ten billion unique compositions and discover four catalysts that outperform all original samples. The best machine learning-optimized catalyst is 33% more active than the highest-performing one in the initial database, showing an ORR activity seven times larger than those typically reported for the same class of materials. © 2022 Elsevier B.V.",High-throughput synthesis; Hydrogen fuel cells; Iron-nitrogen-carbon electrocatalysts; Machine learning; Oxygen reduction reaction; Uncertainty quantification,Carbon; Climate change; Design of experiments; Electrolytic reduction; Fossil fuels; Global optimization; Hydrogen; Iron; Machine learning; Nitrogen; Oxygen; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Uncertainty analysis; Adaptive learning; High-throughput synthesis; Hydrogen fuel cells; Iron nitrogen; Iron-nitrogen-carbon electrocatalyst; Machine-learning; Nitrogen-carbon; Oxygen reduction reaction; Uncertainty quantifications; ]+ catalyst; Electrocatalysts,High-throughput synthesis;Hydrogen fuel cells;Iron-nitrogen-carbon electrocatalysts;Machine learning;Oxygen reduction reaction;Uncertainty quantification;Carbon;Climate change;Design of experiments;Electrolytic reduction;Fossil fuels;Global optimization;Hydrogen;Iron;Nitrogen;Oxygen;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Uncertainty analysis;Adaptive learning;Iron nitrogen;Iron-nitrogen-carbon electrocatalyst;Machine-learning;Nitrogen-carbon;Uncertainty quantifications;]+ catalyst;Electrocatalysts,"W.J.M. Kort-Kamp; Theoretical Division, Los Alamos National Laboratory, Los Alamos, 87545, United States; email: kortkamp@lanl.gov",,,,,,Elsevier B.V.,03787753,0444894810,JPSOD,,English,J Power Sources,Article,Scopus,,2-s2.0-85146290715,,United States,lanl.gov,,,"Kort-Kamp, W.J.M.; Ferrandon, M.; Wang, X.; Park, J.H.; Malla, R.K.; Ahmed, T.; Holby, E.F.; Myers, D.J.; Zelenay, P."
"Liu, H., Zhou, X., Liu, T., Yue, R., Chen, B., Pei, Y., Wang, L., Zhang, J., Yin, Y.",A defective 2D Fe–N–C nanofilm embedded with porous carbon derived from dicyandiamide as an effective oxygen reduction catalyst for PEMFCs,2025,Journal of Materials Chemistry A,13,43,,37469,37478,,0,10.1039/d5ta05898h,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105018747266&doi=10.1039%2Fd5ta05898h&partnerID=40&md5=7ce2311a0549c6806cf034e9b74e7b0e,"State Key Laboratory of Engines, Tianjin University, Tianjin, China","Liu, Haotian, State Key Laboratory of Engines, Tianjin University, Tianjin, China; Zhou, Xiangju, State Key Laboratory of Engines, Tianjin University, Tianjin, China; Liu, Tao, State Key Laboratory of Engines, Tianjin University, Tianjin, China; Yue, Runfei, State Key Laboratory of Engines, Tianjin University, Tianjin, China; Chen, Bin, State Key Laboratory of Engines, Tianjin University, Tianjin, China; Pei, Yabiao, State Key Laboratory of Engines, Tianjin University, Tianjin, China; Wang, Lianqin, State Key Laboratory of Engines, Tianjin University, Tianjin, China; Zhang, Junfeng, State Key Laboratory of Engines, Tianjin University, Tianjin, China; Yin, Yan, State Key Laboratory of Engines, Tianjin University, Tianjin, China","Two-dimensional (2D) materials with high specific surface areas are considered promising precursors for creating highly effective Fe–N–C catalysts that improve the oxygen reduction reaction (ORR) activity, thereby lowering costs of the catalyst layer (CL) in proton exchange membrane fuel cells (PEMFCs). However, 2D materials tend to agglomerate while preparing the MEA, compromising PEMFC performance. In this study, we introduce an Fe–N–C catalyst using an ultrathin 2D N-doped carbon film (NCF) derived from a ZIF precursor through a metal salt-assisted pyrolysis approach. The active sites are fabricated via Fex+ adsorption and dicyandiamide (DCDA)-assisted pyrolysis. Adding DCDA improves the coordination environment of Fe and forms defects on the surface of the catalyst, promoting the exposure of the Fe active site. The porous carbon particles derived from DCDA result in hierarchical pores in the CL, promoting the utilization of active sites. The resulting catalyst (NCF-Fe-DCDA) exhibits superior ORR activity, achieving a half-wave potential (E<inf>1/2</inf>) of 0.831 V<inf>RHE</inf> under acidic conditions. The MEA equipped with the NCF-Fe-DCDA CL demonstrates low mass-transport overpotential and a remarkable power density of 845 mW cm−2 under H<inf>2</inf>/O<inf>2</inf> conditions. This research introduces an innovative approach for the synthesis of 2D Fe–N–C catalysts for PEMFC application. This journal is © The Royal Society of Chemistry, 2025",,Carbon films; Catalyst activity; Doping (additives); Electrolytic reduction; Iron; Iron compounds; Oxygen; Oxygen reduction reaction; Porous carbon; Porous materials; Pyrolysis; Surface defects; Ultrathin films; Active site; Catalysts layers; Dicyandiamide; N-doped carbon film; Proton-exchange membranes fuel cells; Reaction activity; Two-dimensional; Two-dimensional materials; ]+ catalyst; Proton exchange membrane fuel cells (PEMFC),Carbon films;Catalyst activity;Doping (additives);Electrolytic reduction;Iron;Iron compounds;Oxygen;Oxygen reduction reaction;Porous carbon;Porous materials;Pyrolysis;Surface defects;Ultrathin films;Active site;Catalysts layers;Dicyandiamide;N-doped carbon film;Proton-exchange membranes fuel cells;Reaction activity;Two-dimensional;Two-dimensional materials;]+ catalyst;Proton exchange membrane fuel cells (PEMFC),"J. Zhang; State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300072, China; email: geosign@tju.edu.cn; Y. Yin; State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300072, China; email: yanyin@tju.edu.cn",,,,,,Royal Society of Chemistry,20507488,,JMCAE,,English,J. Mater. Chem. A,Article,Scopus,,2-s2.0-105018747266,,China,tju.edu.cn,,,"Liu, H.; Zhou, X.; Liu, T.; Yue, R.; Chen, B.; Pei, Y.; Wang, L.; Zhang, J.; Yin, Y."
"Zhang, S.S., Qin, Y.Y., Ding, S.J., Su, Y.Q.",A DFT Study on the Activity Origin of Fe-N-C Sites for Oxygen Reduction Reaction,2022,CHEMPHYSCHEM,23,15,e202200165,,,5,15,10.1002/cphc.202200165,,"[Zhang, Shishi; Qin, Yanyang; Ding, Shujiang; Su, Yaqiong] Xi An Jiao Tong Univ, Sch Chem, Xian Key Lab Sustainable Energy Mat Chem, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R China; [Su, Yaqiong] Eindhoven Univ Technol, Dept Chem Engn & Chem, Lab Inorgan Mat & Catalysis, POB 513, NL-5600 MB Eindhoven, Netherlands",,"Iron-nitrogen-carbon materials have been known as the most promising non-noble metal catalyst for proton-exchange membrane fuel cells (PEMFCs), but the genuine active sites for oxygen reduction reaction (ORR) are still arguable. Herein, by the thorough density functional theory investigations, we unravel that the planar Fe2N6 site exhibits excellent ORR catalytic activity over both FeN3 and FeN4 sites, and the potential-determining step is determined to be the *OH hydrogenation step with an overpotential of 0.415 V. The ORR activity of Fe2N6 site originates from the low spin magnetic moment (1.11 mu(B)), which leads to high antibonding states and low d-band center of the Fe center, further leads to weak binding strength of *OH species. The density of FeN4 sites only has little influence on the ORR activity owing to the similar interaction between active site and intermediates in ORR. Our research sheds light on the activity origin of iron-nitrogen-carbon materials for ORR.",active site; density functional calculations; electrochemistry; oxygen reduction reaction; single atom catalysts,SINGLE-ATOM CATALYSTS; ELECTROCATALYST; IDENTIFICATION; CARBON,active site;density functional calculations;electrochemistry;oxygen reduction reaction;single atom catalysts;SINGLE-ATOM CATALYSTS;ELECTROCATALYST;IDENTIFICATION;CARBON,yqsu1989@xjtu.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1439-4235,,,35513342,English,CHEMPHYSCHEM,Article,WoS,Chemistry; Physics,WOS:000806988000001,2-s2.0-85131325850,China;Netherlands,xjtu.edu.cn,Xi An Jiao Tong Univ;Eindhoven Univ Technol,"Xi An Jiao Tong Univ, China;Eindhoven Univ Technol, Netherlands","Zhang, Shishi; Qin, Yanyang; Ding, Shujiang; Su, Yaqiong"
"Jang, Y., Yi, S.Y., Lee, J.W.",Advanced approach for active and durable proton exchange membrane fuel cells: Coupling synergistic effects of M-N-C nanocomposites,2024,ECOMAT,6,10,,,,26,3,10.1002/eom2.12488,,"[Jang, Yeju; Yi, Seung Yeop; Lee, Jinwoo] Korea Adv Inst Sci & Technol KAIST, Dept Chem & Biomol Engn, 291 Daehak Ro, Daejeon 34141, South Korea",,"Atomically dispersed metal and nitrogen co-doped carbon (M-N-C) is a promising oxygen reduction reaction (ORR) catalyst for electrochemical energy storage and conversion applications but typically suffers from low durability and activity under the acidic conditions of practical polymer electrolyte exchange membrane fuel cells (PEMFCs). Recently, the performance of M-N-C nanocomposites under acidic ORR conditions has been enhanced by exploiting the synergistic coupling effects of their constituents (single-atom sites, nanoclusters, and nanoparticles). The unique geometric structures formed by the coupling of diverse sites in these nanocomposites provide optimal electronic structures and efficient reaction pathways, thus resulting in high activity and long-term durability. This work provides an overview of M-N-C nanocomposites as ORR electrocatalysts under practical PEMFC conditions, focusing on activity and durability enhancement methods and highlighting the strategies used to prepare electrocatalytically efficient M-N-C nanocomposites containing no or low amounts of platinum group metals. Progress in the development of advanced M-N-C nanocomposites as acidic ORR catalysts is discussed, and the pivotal role of synergistic effects resulting from the coupling sites within the nanocomposites is explored together with the characterization methods used to elucidate these effects. Finally, the challenges and prospects of developing M-N-C nanocomposites as next-generation electrocatalysts are presented.image",atomically dispersed catalysts; coupling synergistic effects; nanocomposites; oxygen reduction reactions; polymer electrolyte membrane fuel cells,NITROGEN-CARBON CATALYSTS; OXYGEN REDUCTION REACTION; DURABILITY; DESIGN; ELECTROCATALYSTS; NANOPARTICLES; PLATINUM; SITES,atomically dispersed catalysts;coupling synergistic effects;nanocomposites;oxygen reduction reactions;polymer electrolyte membrane fuel cells;NITROGEN-CARBON CATALYSTS;OXYGEN REDUCTION REACTION;DURABILITY;DESIGN;ELECTROCATALYSTS;NANOPARTICLES;PLATINUM;SITES,jwlee1@kaist.ac.kr,,"111 RIVER ST, HOBOKEN 07030-5774, NJ USA",,,,WILEY,,,,,English,ECOMAT,Review,WoS,Chemistry; Science & Technology - Other Topics; Materials Science,WOS:001329563400001,2-s2.0-85205818896,South Korea,kaist.ac.kr,Korea Adv Inst Sci & Technol KAIST,"Korea Adv Inst Sci & Technol KAIST, South Korea","Jang, Yeju; Yi, Seung Yeop; Lee, Jinwoo"
"Deng, Y.J., Luo, J.M., Chi, B., Tang, H.B., Li, J., Qiao, X.C., Shen, Y.J., Yang, Y.J., Jia, C.M., Rao, P., Liao, S.J., Tian, X.L.",Advanced Atomically Dispersed Metal-Nitrogen-Carbon Catalysts Toward Cathodic Oxygen Reduction in PEM Fuel Cells,2021,ADVANCED ENERGY MATERIALS,11,37,2101222,,,23,194,10.1002/aenm.202101222,,"[Deng, Yijie] Univ South China, Sch Resource Environm & Safety Engn, Hunan Prov Engn Technol Res Ctr Uranium Tailings, Hengyang 421001, Peoples R China; [Luo, Junming; Li, Jing; Shen, Yijun; Yang, Yingjie; Jia, Chunman; Rao, Peng; Tian, Xinlong] Hainan Univ, Sch Chem Engn & Technol, Hainan Prov Key Lab Fine Chem, State Key Lab Marine Resource Utilizat South Chin, Haikou 570228, Hainan, Peoples R China; [Chi, Bin; Liao, Shijun] South China Univ Technol, Sch Chem & Chem Engn, Key Lab Fuel Cell Technol Guangdong Prov, Guangzhou 510641, Peoples R China; [Tang, Haibo] Sun Yat Sen Univ, Sch Chem, Guangzhou 510275, Peoples R China; [Qiao, Xiaochang] Dongguan Univ Technol, Sch Mat Sci & Engn, Dongguan 523808, Peoples R China",,"Proton exchange membrane fuel cells (PEMFCs) are a highly efficient hydrogen energy conversion technology, which shows great potential in mitigating carbon emissions and the energy crisis. Currently, to accelerate the kinetics of the oxygen reduction reaction (ORR) required for PEMFCs, extensive utilization of expensive and rare platinum-based catalysts are required at the cathodic side, impeding their large-scale commercialization. In response to this issue, atomically dispersed metal-nitrogen-carbon (M-N-C) catalysts with cost-effectiveness, encouraging activity, and unique advantages (e.g., homogeneous activity sites, high atom efficiency, and intrinsic activity) have been widely investigated. Considerable progress in this domain has been witnessed in the past decade. Herein, a comprehensive summary of recent development in atomically dispersed M-N-C catalysts for the ORR under acidic conditions and of their application in the membrane electrode assembly (MEA) of PEM fuel cells, are presented. The ORR mechanisms, composition, and operating principles of PEMFCs are introduced. Thereafter, atomically dispersed M-N-C catalysts towards improved acidic ORR and MEA performance is summarized in detail, and improvement strategies for MEA performance and stability are systematically analyzed. Finally, remaining challenges and significant research directions for design and development of high-performance atomically dispersed M-N-C catalysts and MEA are discussed.",membrane electrode assembly; oxygen reduction reaction; PEM fuel cells; rotating disk electrodes; single atom catalysts,FE-N-C; SINGLE-ATOM CATALYSTS; HIGH-PERFORMANCE; ACTIVE-SITES; ORGANIC FRAMEWORKS; MICROPOROUS LAYER; DOPED CARBON; BIFUNCTIONAL ELECTROCATALYSTS; TRANSPORT RESISTANCE; FE/N/C CATALYSTS,membrane electrode assembly;oxygen reduction reaction;PEM fuel cells;rotating disk electrodes;single atom catalysts;FE-N-C;SINGLE-ATOM CATALYSTS;HIGH-PERFORMANCE;ACTIVE-SITES;ORGANIC FRAMEWORKS;MICROPOROUS LAYER;DOPED CARBON;BIFUNCTIONAL ELECTROCATALYSTS;TRANSPORT RESISTANCE;FE/N/C CATALYSTS,2020000104@usc.edu.cn; chsjliao@scut.edu.cn; tianxl@hainanu.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1614-6832,,,,English,ADV ENERGY MATER,Review,WoS,Chemistry; Energy & Fuels; Materials Science; Physics,WOS:000688529100001,2-s2.0-85113415833,China,usc.edu.cn,Univ South China;Hainan Univ;South China Univ Technol;Sun Yat Sen Univ;Dongguan Univ Technol,"Univ South China, China;Hainan Univ, China;South China Univ Technol, China;Sun Yat Sen Univ, China;Dongguan Univ Technol, China","Deng, Yijie; Luo, Junming; Chi, Bin; Tang, Haibo; Li, Jing; Qiao, Xiaochang; Shen, Yijun; Yang, Yingjie; Jia, Chunman; Rao, Peng; Liao, Shijun; Tian, Xinlong"
"Tian, X., Lu, X.F., Xia, B.Y., Lou, X.W.D.",Advanced Electrocatalysts for the Oxygen Reduction Reaction in Energy Conversion Technologies,2020,Joule,4,1,,45,68,,784,10.1016/j.joule.2019.12.014,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85077504903&doi=10.1016%2Fj.joule.2019.12.014&partnerID=40&md5=9a3edb76cad5a4c623bfbabe81fe621a,"School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China; School of Chemistry, Chemical Engineering and Biotechnology, Singapore City, Singapore","Tian, Xinlong, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China; Lu, Xue Feng, School of Chemistry, Chemical Engineering and Biotechnology, Singapore City, Singapore; Xia, Bao Yu, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China; Lou, Xiong Wen (David), School of Chemistry, Chemical Engineering and Biotechnology, Singapore City, Singapore","Exploring highly active and durable electrocatalysts for oxygen reduction reaction (ORR) is indispensable for several important energy conversion technologies. In this review, we provide some discussion about the current ORR electrocatalysts from the perspective of practical applications. The advantages and shortcomings, along with the performance achieved by the catalysts are briefly reviewed, and the improvement in the rational design approaches are emphasized at the full-cell level. Finally, the present challenges and prospects are discussed for developing advanced ORR electrocatalysts.; The exploration of highly active, durable, and cost-effective electrocatalysts for the oxygen reduction reaction (ORR) is indispensable for several important energy conversion technologies. Significant achievements have been made with numerous efforts devoted by the academic and industrial researchers. In this review, from a more practical point of view, the tests and experiments at the membrane electrode assembly (MEA) level are accentuated due to the fact that the rotating disk electrode (RDE) level performance cannot be transformed directly into the MEA level. Four major categories of the current ORR electrocatalysts are discussed, namely, platinum group metal (PGM or noble) catalysts, non-PGM catalysts, carbon-based catalysts, and single-atom-based catalysts. The advantages and shortcomings, along with the performance achieved by the catalysts, are briefly reviewed, and the improvement in the rational design approaches is emphasized at the full-cell level. Finally, the present challenges and prospects are discussed for developing advanced ORR electrocatalysts.; Proton exchange membrane fuel cells (PEMFCs) and metal-air batteries have attracted considerable attention as the promising supply of clean energy for residential applications, vehicles, and stationary power systems owing to their high energy conversion efficiency, high energy density, low emissions, and high consistency. Nevertheless, the widespread applications of PEMFCs or metal-air batteries are still severely hampered by the sluggish oxygen reduction reaction (ORR) at the cathodic side, which needs considerable amounts of Pt to compensate for this issue. Herein, the research progress on the ORR electrocatalysts, mainly including platinum group metal (PGM or noble) catalysts, non-PGM catalysts, carbon-based catalysts, and single-atom-based catalysts, is critically reviewed. From the perspective of practical applications, one great concern is whether an effective ORR catalyst at the rotating disk electrode (RDE) level could be competent at the membrane electrode assembly (MEA) level. We put emphasis on why and how to bring about the rational design of the electrocatalysts to overcome the sluggish ORR kinetics, particularly underlining the applicable approaches by which the RDE level performance could be translated into the MEA level. With considerable efforts and attentions given on the systematic progress of ORR electrocatalysts, it is expected that the clean and sustainable energy can be foreseeable in the near future. © 2019 Elsevier Inc.; © 2019 Elsevier Inc.; © 2019 Elsevier Inc.",electrocatalysis; fuel cells; oxygen reduction reaction; Zn-air batteries,Carbon; Conversion efficiency; Cost effectiveness; Electrocatalysis; Electrocatalysts; Electrodes; Electrolysis; Electrolytic reduction; Fuel cells; More electric aircraft; Oxygen; Platinum; Rotating disks; Zinc air batteries; Energy conversion technologies; High energy conversions; Membrane electrode assemblies; Oxygen reduction reaction; Proton exchange membrane fuel cell (PEMFCs); Residential application; Rotating disk electrodes; Stationary power systems; Proton exchange membrane fuel cells (PEMFC),electrocatalysis;fuel cells;oxygen reduction reaction;Zn-air batteries;Carbon;Conversion efficiency;Cost effectiveness;Electrocatalysts;Electrodes;Electrolysis;Electrolytic reduction;More electric aircraft;Oxygen;Platinum;Rotating disks;Zinc air batteries;Energy conversion technologies;High energy conversions;Membrane electrode assemblies;Proton exchange membrane fuel cell (PEMFCs);Residential application;Rotating disk electrodes;Stationary power systems;Proton exchange membrane fuel cells (PEMFC),"B.Y. Xia; School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 1037 Luoyu Road, 430074, China; email: byxia@hust.edu.cn",,,,,,Cell Press subs@cell.com,,,,,English,Joule,Review,Scopus,,2-s2.0-85077504903,,China;Singapore,hust.edu.cn,,,"Tian, X.; Lu, X.F.; Xia, B.Y.; Lou, X.W.D."
"Rhodes, C., Kesmez, M., Fu, Y., Salinas, C., Heselmeyer, E., Parkey, J., Wharton, T., Mullings, M., van Boeyen, R., Cisar, A.",Advanced hydroxide conducting membranes for alkaline fuel cells,2009,ACS National Meeting Book of Abstracts,,,,,,,0,,https://www.scopus.com/inward/record.uri?eid=2-s2.0-78649796140&partnerID=40&md5=6b805f0471eedd219ff374182efabfe7,"Lynntech, Inc., College Station, TX, United States","Rhodes, Christopher P., Lynntech, Inc., College Station, TX, United States; Kesmez, Mehmet, Lynntech, Inc., College Station, TX, United States; Fu, Yongzhu, Lynntech, Inc., College Station, TX, United States; Salinas, Carlos E., Lynntech, Inc., College Station, TX, United States; Heselmeyer, Eric, Lynntech, Inc., College Station, TX, United States; Parkey, Jeffrey S., Lynntech, Inc., College Station, TX, United States; Wharton, Tim, Lynntech, Inc., College Station, TX, United States; Mullings, Matthew E., Lynntech, Inc., College Station, TX, United States; van Boeyen, Roger W., Lynntech, Inc., College Station, TX, United States; Cisar, Alan J., Lynntech, Inc., College Station, TX, United States","Alkaline fuel cells (AFCs) offer advantages over proton-exchange membrane fuel cells (PEMFCs) for specific applications. For both oxygen reduction and fuel oxidation, alkaline conditions provide superior electrochemical reaction thermodynamics compared to acidic conditions. Due to their reduced fuel crossover, AFCs can provide systems with improved energy densities based on their ability to utilize highly concentrated liquid fuels compared to conventional PEMFCs running on more dilute liquid fuels. In addition, AFCs can utilize non-precious metal catalysts rather than expensive precious metal (e.g., Pt, Ru) catalysts used for PEMFCs. Despite their potential, the development of new hydroxide conducting membranes and ionomers is needed to avoid the requirement to use liquid KOH (safety, carbon dioxide issues) and to increase the power density and thermal stability of AEMFCs (anion-exchange membrane fuel cells). Lynntech has developed advanced hydroxide conducting membranes and ionomers for AEMFCs and performed initial characterization of the membranes in operational fuel cells.",,,,"C. Rhodes; Lynntech, Inc., College Station, TX 77840, 7610 Eastmark Dr., United States; email: chris.rhodes@lynntech.com",,,"238th National Meeting and Exposition of the American Chemical Society, ACS 2009",,,,00657727,084127438X; 9780841274082; 0841269556; 0841274088; 9780841269941; 9780841224414; 9780841274266; 9780841269859; 0841274266; 9780841274389,ACSRA,,English,ACS Natl. Meet. Book Abstr.,Conference paper,Scopus,,2-s2.0-78649796140,,United States,lynntech.com,,,"Rhodes, C.; Kesmez, M.; Fu, Y.; Salinas, C.; Heselmeyer, E.; Parkey, J.; Wharton, T.; Mullings, M.; van Boeyen, R.; Cisar, A."
"Sun, Y.Y., Polani, S., Luo, F., Ott, S., Strasser, P., Dionigi, F.",Advancements in cathode catalyst and cathode layer design for proton exchange membrane fuel cells,2021,NATURE COMMUNICATIONS,12,1,5984,,,14,120,10.1038/s41467-021-25911-x,,"[Sun, Yanyan; Polani, Shlomi; Luo, Fang; Ott, Sebastian; Strasser, Peter; Dionigi, Fabio] Tech Univ Berlin, Div Chem Engn, Dept Chem, Electrochem Energy Catalysis & Mat Sci Lab, Str 17 Juni 124, D-10623 Berlin, Germany; [Sun, Yanyan] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China",,"The high platinum loadings at the cathodes of proton exchange membrane fuel cells significantly contribute to the cost of these clean energy conversion devices. Here, the authors critically review and discuss recent developments on low- and non-platinum-based cathode catalysts and catalyst layers. Proton exchange membrane fuel cells have been recently developed at an increasing pace as clean energy conversion devices for stationary and transport sector applications. High platinum cathode loadings contribute significantly to costs. This is why improved catalyst and support materials as well as catalyst layer design are critically needed. Recent advances in nanotechnologies and material sciences have led to the discoveries of several highly promising families of materials. These include platinum-based alloys with shape-selected nanostructures, platinum-group-metal-free catalysts such as metal-nitrogen-doped carbon materials and modification of the carbon support to control surface properties and ionomer/catalyst interactions. Furthermore, the development of advanced characterization techniques allows a deeper understanding of the catalyst evolution under different conditions. This review focuses on all these recent developments and it closes with a discussion of future research directions in the field.",,OXYGEN REDUCTION REACTION; FE-N-C; DENSITY-FUNCTIONAL THEORY; ACTIVE-SITES; COMPOSITIONAL SEGREGATION; ANISOTROPIC GROWTH; POWER PERFORMANCE; ORR PERFORMANCE; CARBON; ELECTROCATALYSTS,OXYGEN REDUCTION REACTION;FE-N-C;DENSITY-FUNCTIONAL THEORY;ACTIVE-SITES;COMPOSITIONAL SEGREGATION;ANISOTROPIC GROWTH;POWER PERFORMANCE;ORR PERFORMANCE;CARBON;ELECTROCATALYSTS,pstrasser@tu-berlin.de; fabio.dionigi@tu-berlin.de,,"HEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY",,,,NATURE PORTFOLIO,,,,34645781,English,NAT COMMUN,Review,WoS,Science & Technology - Other Topics,WOS:000707028100024,,Germany;China,tu-berlin.de,Tech Univ Berlin;Cent South Univ,"Tech Univ Berlin, Germany;Cent South Univ, China","Sun, Yanyan; Polani, Shlomi; Luo, Fang; Ott, Sebastian; Strasser, Peter; Dionigi, Fabio"
"Narayanan, N., Ravichandran, B., Emayavaramban, I., Liu, H.Y., Su, H.N.",Advancements in Non-Precious Metal Catalysts for High-Temperature Proton-Exchange Membrane Fuel Cells: A Comprehensive Review,2025,CATALYSTS,15,8,775,,,31,2,10.3390/catal15080775,,"[Narayanan, Naresh; Ravichandran, Balamurali; Liu, Huiyuan; Su, Huaneng] Jiangsu Univ, Inst Energy Res, 301 Xuefu Rd, Zhenjiang 212013, Peoples R China; [Emayavaramban, Indubala] Jiangsu Univ, Coll Mat Sci & Engn, 301 Xuefu Rd, Zhenjiang 212013, Peoples R China",,"High-Temperature Proton-Exchange Membrane Fuel Cells (HT-PEMFCs) represent a promising clean energy technology and are valued for their fuel flexibility and simplified balance of plant. Their commercialization, however, is critically hindered by the prohibitive cost and resource scarcity of platinum-group metal (PGM) catalysts. The challenge is amplified in the phosphoric acid (PA) electrolyte of HT-PEMFCs, where the severe anion poisoning of PGM active sites necessitates impractically high catalyst loadings. This review addresses the urgent need for cost-effective alternatives by providing a comprehensive assessment of recent advancements in non-precious metal (NPM) catalysts for the oxygen reduction reaction (ORR) in HT-PEMFCs. It systematically explores synthesis strategies and structure-performance relationships for emerging catalyst classes, including transition metal compounds, metal-nitrogen-carbon (M-N-C) materials, and metal-free heteroatom-doped carbons. A significant focus is placed on M-N-C catalysts, particularly those with atomically dispersed Fe-Nx active sites, which have emerged as the most viable replacements for platinum due to their high intrinsic activity and notable tolerance to phosphate poisoning. This review critically analyzes key challenges that impede practical application, such as the trade-off between catalyst activity and stability, mass transport limitations in thick electrodes, and long-term degradation in the harsh PA environment. Finally, it outlines future research directions, emphasizing the need for a synergistic approach that integrates computational modeling with advanced operando characterization to guide the rational design of durable, high-performance catalysts and electrode architectures, thereby accelerating the path to commercial viability for HT-PEMFC technology.",high-temperature proton exchange membrane fuel cells (HT-PEMFCs); non-precious metal catalyst; oxygen reduction reaction (ORR); Fe-N-C catalysts; catalyst durability,OXYGEN REDUCTION REACTION; N-C CATALYSTS; POLYMER ELECTROLYTE MEMBRANES; ANION ADSORPTION; DOPED GRAPHENE; CARBON; KINETICS; PERFORMANCE; PHOSPHATE; FE,high-temperature proton exchange membrane fuel cells (HT-PEMFCs);non-precious metal catalyst;oxygen reduction reaction (ORR);Fe-N-C catalysts;catalyst durability;OXYGEN REDUCTION REACTION;N-C CATALYSTS;POLYMER ELECTROLYTE MEMBRANES;ANION ADSORPTION;DOPED GRAPHENE;CARBON;KINETICS;PERFORMANCE;PHOSPHATE;FE,nareshnarayananphysics@outlook.com; balamurali003@outlook.com; indubala043@gmail.com; huiyuanliu@ujs.edu.cn; suhuaneng@ujs.edu.cn,,"MDPI AG, Grosspeteranlage 5, CH-4052 BASEL, SWITZERLAND",,,,MDPI,,,,,English,CATALYSTS,Review,WoS,Chemistry,WOS:001557351400001,2-s2.0-105014526852,China,outlook.com,Jiangsu Univ,"Jiangsu Univ, China","Narayanan, Naresh; Ravichandran, Balamurali; Emayavaramban, Indubala; Liu, Huiyuan; Su, Huaneng"
"Zhang, J., Aili, D., Lu, S., Li, Q., Jiang, S.P.",Advancement toward polymer electrolyte membrane fuel cells at elevated temperatures,2020,Research,2020,,9089405,,,,69,10.34133/2020/9089405,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85087571155&doi=10.34133%2F2020%2F9089405&partnerID=40&md5=bbe459f5b2668472b450112cfdd29fb9,"Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, Beihang University, Beijing, China; Department of Energy Conversion and Storage, Technical University of Denmark, Lyngby, Hovedstaden, Denmark; WA School of Mines: Minerals, Energy and Chemical Engineering, Kalgoorlie, WA, Australia","Zhang, Jin, Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, Beihang University, Beijing, China; Aili, David, Department of Energy Conversion and Storage, Technical University of Denmark, Lyngby, Hovedstaden, Denmark; Lu, Shanfu, Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, Beihang University, Beijing, China; Li, Qingfeng, Department of Energy Conversion and Storage, Technical University of Denmark, Lyngby, Hovedstaden, Denmark; Jiang, Sanping, WA School of Mines: Minerals, Energy and Chemical Engineering, Kalgoorlie, WA, Australia","Elevation of operational temperatures of polymer electrolyte membrane fuel cells (PEMFCs) has been demonstrated with phosphoric acid-doped polybenzimidazole (PA/PBI) membranes. The technical perspective of the technology is simplified construction and operation with possible integration with, e.g., methanol reformers. Toward this target, significant efforts have been made to develop acid-base polymer membranes, inorganic proton conductors, and organic-inorganic composite materials. This report is devoted to updating the recent progress of the development particularly of acid-doped PBI, phosphate-based solid inorganic proton conductors, and their composite electrolytes. Long-term stability of PBI membranes has been well documented, however, at typical temperatures of 160 C. Inorganic proton-conducting materials, e.g., alkali metal dihydrogen phosphates, heteropolyacids, tetravalent metal pyrophosphates, and phosphosilicates, exhibit significant proton conductivity at temperatures of up to 300 C but have so far found limited applications in the form of thin films. Composite membranes of PBI and phosphates, particularly in situ formed phosphosilicates in the polymer matrix, showed exceptionally stable conductivity at temperatures well above 200 C. Fuel cell tests at up to 260 C are reported operational with good tolerance of up to 16% CO in hydrogen, fast kinetics for direct methanol oxidation, and feasibility of nonprecious metal catalysts. The prospect and future exploration of new proton conductors based on phosphate immobilization and fuel cell technologies at temperatures above 200 C are discussed. © © 2020 Jin Zhang et al. Exclusive Licensee Science and Technology Review Publishing House.",,Alkali metals; Catalysts; Cell immobilization; Composite membranes; Films; Membranes; Metallic matrix composites; Methanol; organic-inorganic materials; Phosphates; Phosphoric acid fuel cells (PAFC); Polyelectrolytes; Polymer matrix composites; Proton exchange membrane fuel cells (PEMFC); Fuel cell technologies; Inorganic proton conductors; Non-precious metal catalysts; Operational temperature; Organic-inorganic composite; Phosphoric acid doped polybenzimidazole; Polymer electrolyte membrane fuel cell (PEMFCs); Proton conducting materials; Solid electrolytes,Alkali metals;Catalysts;Cell immobilization;Composite membranes;Films;Membranes;Metallic matrix composites;Methanol;organic-inorganic materials;Phosphates;Phosphoric acid fuel cells (PAFC);Polyelectrolytes;Polymer matrix composites;Proton exchange membrane fuel cells (PEMFC);Fuel cell technologies;Inorganic proton conductors;Non-precious metal catalysts;Operational temperature;Organic-inorganic composite;Phosphoric acid doped polybenzimidazole;Polymer electrolyte membrane fuel cell (PEMFCs);Proton conducting materials;Solid electrolytes,"S. Lu; Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices & School of Space and Environment, Beihang University, Beijing, 100191, China; email: lusf@buaa.edu.cn; Q. Li; Department of Energy Conversion and Storage, Technical University of Denmark, Lyngby, Fysikvej 310, 2800, Denmark; email: qfli@dtu.dk; S.P. Jiang; Fuels and Energy Technology Institute & WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Perth, 6102, Australia; email: s.jiang@curtin.edu.au",,,,,,American Association for the Advancement of Science,20965168,,,,English,Res.,Review,Scopus,,2-s2.0-85087571155,,China;Denmark;Australia,buaa.edu.cn,,,"Zhang, J.; Aili, D.; Lu, S.; Li, Q.; Jiang, S.P."
"Yan, W., Zhang, J., Wang, H., Lu, S., Xiang, Y.",Advancement toward reforming methanol high temperature polymer electrolyte membrane fuel cells; 重整甲醇高温聚合物电解质膜燃料电池研究进展与展望,2021,Huagong Jinzhan/Chemical Industry and Engineering Progress,40,6,,2980,2992,,3,10.16085/j.issn.1000-6613.2020-1902,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85116955198&doi=10.16085%2Fj.issn.1000-6613.2020-1902&partnerID=40&md5=952336c1899ec2417954b15b7dbadf53,"Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, Beihang University, Beijing, China","Yan, Wenrui, Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, Beihang University, Beijing, China; Zhang, Jin, Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, Beihang University, Beijing, China; Wang, Haining, Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, Beihang University, Beijing, China; Lu, Shanfu, Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, Beihang University, Beijing, China; Xiang, Yan, Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, Beihang University, Beijing, China","Compared to hydrogen, the liquid methanol shows numerous advantages, including convenient storage and transportation as well as high energy density. Hydrogen fuel is released via reforming methanol, then the reformed gas is employed as the fuel for high-temperature polymer electrolyte membrane fuel cell system. The integrated system with reforming methanol and high-temperature polymer electrolyte membrane fuel cell is the reforming methanol fuel cell, which transforms the chemical energy of methanol and oxygen to electricity with high efficiency. This work summarizes the implementation and development of the reforming methanol fuel cell systems with different configurations (external reforming and internal reforming) and introduces their current application status. It also points out their bottlenecks in technical research and application and provides future research guidelines. The effort to improve the performance of reforming methanol fuel cells in the future is to develop low-temperature methanol reforming catalyst with high conversion rate and efficiency, and stable high-temperature polymer electrolyte membrane and non-precious metal catalysts. © 2021, Chemical Industry Press Co., Ltd. All right reserved.",External reforming; Fuel cell; Integration; Internal reforming; Reforming methanol fuel cell,Catalysts; Fuel systems; Hydrogen storage; Methanol; Methanol fuels; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Temperature; Application status; High energy densities; High temperature polymer electrolyte membranes; Internal reforming; Methanol reforming; Non-precious metal catalysts; Storage and transportations; Technical research; Solid electrolytes,External reforming;Fuel cell;Integration;Internal reforming;Reforming methanol fuel cell;Catalysts;Fuel systems;Hydrogen storage;Methanol;Methanol fuels;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Temperature;Application status;High energy densities;High temperature polymer electrolyte membranes;Methanol reforming;Non-precious metal catalysts;Storage and transportations;Technical research;Solid electrolytes,"J. Zhang; Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space and Environment, Beihang University, Beijing, 100191, China; email: zhangjin1@buaa.edu.cn; S. Lu; Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space and Environment, Beihang University, Beijing, 100191, China; email: lusf@buaa.edu.cn",,,,,,Materials China,10006613,,,,Chinese,Huagong Jinzhan/Chem. Ind. Eng. Prog.,Review,Scopus,,2-s2.0-85116955198,,China,buaa.edu.cn,,,"Yan, W.; Zhang, J.; Wang, H.; Lu, S.; Xiang, Y."
"Yang, X., Chen, C., Zhou, Z., Sun, S.",Advances in active site structure of carbon-based non-precious metal catalysts for oxygen reduction reaction,2019,Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica,35,5,,472,485,,45,10.3866/PKU.WHXB201806131,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85055714851&doi=10.3866%2FPKU.WHXB201806131&partnerID=40&md5=85efb87503a206e20d934efa7018f2ed,"College of Materials Science and Engineering, Huaqiao University, Quanzhou, Fujian, China; Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen, Fujian, China","Yang, Xiaodong, College of Materials Science and Engineering, Huaqiao University, Quanzhou, Fujian, China; Chen, Chi, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; Zhou, Zhiyou, Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen, Fujian, China; Sun, Shigang, Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen, Fujian, China","Carbon-based non-precious metal catalysts, represented by pyrolyzed Fe/N/C, are the most promising catalysts to replace platinum for the oxygen reduction reaction (ORR). Therefore, further improvement of their performance will be significant for commercialization of proton exchange membrane fuel cells. Unveiling the nature of active sites at the atomic scale paves the way for rational designs of Fe/N/C catalysts with high activity and durability. Herein, we review the advances in the active site structure of carbon-based non-precious metal catalysts. Three types of active sites are discussed in the order of their ORR activity, namely, iron/nitrogen-containing sites, nitrogen-containing sites, and carbon defects. In the iron/nitrogencontaining sites, some of iron atoms are amorphous and positioned in a porphyrin-like plane structure with single-iron-atom coordinated to nitrogen. Iron in porphyrin-like sites is believed to directly bind to dioxygen with electron transfer from e<inf>g</inf>-orbitals (d<inf>z</inf> 2) of iron to antibonding orbitals of dioxygen. Factors governing the energy level of e<inf>g</inf>-orbitals (d<inf>z</inf> 2) are certainly effected the ORR activity, including coordination number, atom type, axial ligand effect and electron-donating/withdrawing capability of the carbon matrix. The structures of porphyrin-like iron centers are described as four-coordinate FeN<inf>4</inf>, five-coordinate N-FeN<inf>2+2</inf>, O<inf>2</inf>-FeN<inf>4</inf>C<inf>12</inf> and Fe-N<inf>2+2</inf> bridging two graphene edges. Moreover, some highly active sites are proposed with basic N-group or defective carbon neighboring the Fe-N center. It is worth noting that surface probing is a powerful tool to identify porphyrin-like iron sites, as well as to estimate its density and turnover frequency. The prospect of surface probe is combined with spectroscopy techniques that will be tremendously helpful in providing further insights of pyrolyzed Fe/N/C. Besides the iron in porphyrin-like sites, other iron atoms are incorporated into crystalline iron nanoparticles and clusters, which are speculated to facilitate electron transfer from nitrogen-doped carbon to dioxygen. However, the role of crystalline iron remains uncertain, because conflicting experimental results are often observed when crystalline iron is removed. Nonetheless, it is undoubted that the iron doping highly boosts the ORR activity of carbon-based catalysts. The next category consists of the nitrogen-containing sites. Various models have been developed to describe the nitrogen-doping carbon catalysts. These include synthesis of planar nitrogen by the layer-by-layer space-confined method, controlled-synthesis of nitrogen on highly-oriented pyrolytic graphite, and selective graft of acetyl group on pyridinic-nitrogen. Strong evidences from models of nitrogen-doping carbon catalysts identify the ortho-carbon atom of the pyridinic ring is the reactive site. The last sites, dopant-free defective carbon, are also found to contribute to ORR. Exploring and summarizing the active sites of pyrolyzed Fe/N/C deepen our understanding of the structure-performance relationship and paves the way for new synthetic strategies. It is expected that the activity as well as stability of pyrolyzed Fe/N/C can be further improved, by exploring the active sites and the ORR mechanism. © Editorial office of Acta Physico-Chimica Sinica.",Active site; Carbon-based non-precious metal catalyst; Electrocatalysis; Fuel cell; Oxygen reduction reaction,,Active site;Carbon-based non-precious metal catalyst;Electrocatalysis;Fuel cell;Oxygen reduction reaction,"Z. Zhou; Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China; email: zhouzy@xmu.edu.cn",,,,,,Beijing University Press huanglu@pku.edu.cn,10006818,,,,Chinese,Wuli Huaxue Xuebao Acta Phys. Chim. Sin.,Review,Scopus,,2-s2.0-85055714851,,China,xmu.edu.cn,,,"Yang, X.; Chen, C.; Zhou, Z.; Sun, S."
"Hidayat, E.F., Juliandri, Zain, S.M., Noviyanti, A.R.",Advances in proton exchange membrane fuel cell (PEMFC) materials: A review of developments from 2021 to 2025,2025,JOURNAL OF POWER SOURCES,657,,238124,,,38,2,10.1016/j.jpowsour.2025.238124,,"[Hidayat, Erlan Fadhlan; Juliandri; Noviyanti, Atiek Rostika] Univ Padjadjaran, Fac Math & Nat Sci, Dept Chem, Sumedang 45363, Indonesia; [Zain, Sharifuddin M.] Univ Malaya, Fac Sci, Dept Chem, Kuala Lumpur 56000, Malaysia",,"Proton Exchange Membrane Fuel Cells (PEMFCs) are a key technology for sustainable energy, converting hydrogen and oxygen into electricity with minimal environmental impact. This review summarizes major advancements in PEMFC materials from 2021 to 2025, focusing on catalysts, proton exchange membranes, gas diffusion layers, bipolar plates, and peripheral components. Notable progress includes the development of non-precious metal and single-atom catalysts as alternatives to platinum, and innovative membrane materials with enhanced proton conductivity and durability. Improvements in gas diffusion layers and bipolar plates have further optimized mass transport and fuel cell efficiency. Despite these advances, challenges remain in reducing material costs, enhancing durability, and scaling up manufacturing. This review provides insights into current innovations and future directions, supporting the development of cleaner and more efficient PEMFC technologies aligned with global sustainability goals.",Catalyst innovation; Durability and performance optimization; Proton exchange membrane fuel cells; Sustainable energy technologies,OXYGEN REDUCTION REACTION; HIGH-PERFORMANCE; BIPOLAR PLATES; ASSISTED SYNTHESIS; CARBON NANOTUBES; CATALYST; BEHAVIOR; LAYER; ELECTROCATALYSTS; TEMPERATURE,Catalyst innovation;Durability and performance optimization;Proton exchange membrane fuel cells;Sustainable energy technologies;OXYGEN REDUCTION REACTION;HIGH-PERFORMANCE;BIPOLAR PLATES;ASSISTED SYNTHESIS;CARBON NANOTUBES;CATALYST;BEHAVIOR;LAYER;ELECTROCATALYSTS;TEMPERATURE,atiek.noviyanti@unpad.ac.id,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0378-7753,,,,English,J POWER SOURCES,Review,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:001562658700001,2-s2.0-105014189840,Indonesia;Malaysia,unpad.ac.id,Univ Padjadjaran;Univ Malaya,"Univ Padjadjaran, Indonesia;Univ Malaya, Malaysia","Hidayat, Erlan Fadhlan; Juliandri; Zain, Sharifuddin M.; Noviyanti, Atiek Rostika"
"Li, B.C., Jervis, R.",Advancing Fe-N-C catalysts: synthesis strategies and performance enhancements for fuel cell applications,2025,ENERGY ADVANCES,4,12,,1412,1425,14,0,10.1039/d5ya00256g,,"[Li, Bochen; Jervis, Rhodri] UCL, Dept Chem Engn, Electrochem Innovat Lab, London WC1E 7JE, England; [Li, Bochen; Jervis, Rhodri] UCL, Dept Chem Engn, Adv Prop Lab, London WC1E 6BT, England",,"Fe-N-C catalysts have emerged as the most promising class of non-precious metal electrocatalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs), offering favourable activity, structure tunability, and cost-effectiveness. However, challenges remain in achieving the performance and durability required for practical applications. This review systematically summarizes recent progress in Fe-N-C catalyst development, with a focus on synthetic strategies aimed at increasing the active site density, optimizing Fe-Nx coordination environments and potential engineering solutions to the membrane electrode assembly (MEA) based on Fe-N-C, particular attention is given to the pyrolysis atmosphere control, post-synthesis treatment, and optimizing the microstructure and catalytic performance. Furthermore, this review explores emerging approaches to integrate Fe-N-C catalysts into membrane electrode assemblies (MEAs), including ionomer-catalyst interaction tuning and electrode architecture optimization, with the goal of bridging the gap from laboratory activity to real-world fuel cell operation.",,OXYGEN-REDUCTION REACTION; ACTIVE-SITES; STABILITY; LAYER,OXYGEN-REDUCTION REACTION;ACTIVE-SITES;STABILITY;LAYER,,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,,,,,English,ENERGY ADV,Review,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:001614255700001,2-s2.0-105024258921,United Kingdom,No email,UCL,"UCL, United Kingdom","Li, Bochen; Jervis, Rhodri"
"Lee, H., Kim, M.J., Lim, T., Sung, Y.E., Kim, H.J., Lee, H.N., Kwon, O.J., Cho, Y.H.","A facile synthetic strategy for iron, aniline-based non-precious metal catalysts for polymer electrolyte membrane fuel cells",2017,SCIENTIFIC REPORTS,7,,5396,,,8,36,10.1038/s41598-017-05830-y,,"[Lee, Hyunjoon; Kim, Min Jeong; Sung, Yung-Eun] Inst for Basic Sci Korea, Ctr Nanoparticle Res, Seoul 08826, South Korea; [Lee, Hyunjoon; Kim, Min Jeong; Sung, Yung-Eun] Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 08826, South Korea; [Lim, Taeho] Soongsil Univ, Dept Chem Engn, 369 Sangdo Ro, Seoul 06978, South Korea; [Kim, Hyun-Jong; Lee, Ho-Nyun] Korea Inst Ind Technol KITECH, Surface Technol Ctr, 7-47 Songdo Dong, Incheon 406840, South Korea; [Kwon, Oh Joong] Incheon Natl Univ, Dept Energy & Chem Engn, 12-1 Songdo Dong, Incheon 22012, South Korea; [Cho, Yong-Hun] Kangwon Natl Univ, Dept Chem Engn, Samcheok 25913, Kangwon Do, South Korea",,"The development of a low cost and highly active alternative to the commercial Pt/C catalysts used in the oxygen reduction reaction (ORR) requires a facile and environmentally-friendly synthesis process to facilitate large-scale production and provide an effective replacement. Transition metals, in conjunction with nitrogen-doped carbon, are among the most promising substitute catalysts because of their high activity, inexpensive composition, and high carbon monoxide tolerance. We prepared a polyanilinederived Fe-N-C catalyst for oxygen reduction using a facile one-pot process with no additional reagents. This process was carried out by ultrasonicating a mixture containing an iron precursor, an aniline monomer, and carbon black. The half-wave potential of the synthesized Fe-N-C catalyst for the ORR was only 10 mV less than that of a commercial Pt/C catalyst. The optimized Fe-N-C catalyst showed outstanding performance in a practical anion exchange membrane fuel cell (AEMFC), suggesting its potential as an alternative to commercial Pt/C catalysts for the ORR.",,OXYGEN REDUCTION REACTION; POLYANILINE; ELECTROCATALYSTS; PERFORMANCE; NANOPARTICLES; GRAPHENE,OXYGEN REDUCTION REACTION;POLYANILINE;ELECTROCATALYSTS;PERFORMANCE;NANOPARTICLES;GRAPHENE,ojkwon@inu.ac.kr; yhun00@kangwon.ac.kr,,"HEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY",,,,NATURE PORTFOLIO,2045-2322,,,28710499,English,SCI REP-UK,Article,WoS,Science & Technology - Other Topics,WOS:000405464200033,2-s2.0-85024371543,South Korea,inu.ac.kr,Inst for Basic Sci Korea;Seoul Natl Univ;Soongsil Univ;Korea Inst Ind Technol KITECH;Incheon Natl Univ;Kangwon Natl Univ,"Inst for Basic Sci Korea, South Korea;Seoul Natl Univ, South Korea;Soongsil Univ, South Korea;Korea Inst Ind Technol KITECH, South Korea;Incheon Natl Univ, South Korea;Kangwon Natl Univ, South Korea","Lee, Hyunjoon; Kim, Min Jeong; Lim, Taeho; Sung, Yung-Eun; Kim, Hyun-Jong; Lee, Ho-Nyun; Kwon, Oh Joong; Cho, Yong-Hun"
"Yin, S.H., Chen, L., Yang, J., Cheng, X.Y., Zeng, H.B., Hong, Y.H., Huang, H., Kuai, X.X., Lin, Y.G., Huang, R., Jiang, Y.X., Sun, S.",A Fe-NC electrocatalyst boosted by trace bromide ions with high performance in proton exchange membrane fuel cells,2024,NATURE COMMUNICATIONS,15,1,7489,,,10,53,10.1038/s41467-024-51858-w,,"[Yin, Shuhu; Chen, Long; Cheng, Xiaoyang; Zeng, Hongbin; Kuai, Xiaoxiao; Huang, Rui; Jiang, Yanxia; Sun, Shigang] Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Coll Chem & Chem Engn & Discipline Intelligent In, Engn Res Ctr Elect Technol,Minist Educ, Xiamen, Peoples R China; [Yang, Jian] Chongqing Univ, Inst Adv Interdisciplinary Studies, Sch Chem & Chem Engn, Ctr Adv Electchem Energy, Chongqing, Peoples R China; [Hong, Yuhao; Kuai, Xiaoxiao] Fujian Sci & Technol Innovat Lab Energy Mat China, Tan Kah Kee Innovat Lab, Xiamen, Fujian, Peoples R China; [Huang, Huan] Chinese Acad Sci, Beijing Synchrotron Radiat Facil, Inst High Energy Phys, Beijing, Peoples R China; [Lin, Yangu] Natl Synchrotron Radiat Res Ctr, Hsinchu, Taiwan",,"Replacement of expensive and rare platinum with metal-nitrogen-carbon catalysts for oxygen reduction reactions in proton exchange membrane fuel cells is hindered by their inferior activity. Herein, we report a highly active iron-nitrogen-carbon catalyst by optimizing the carbon structure and coordination environments of Fe-N-4 sites. A critical high-temperature treatment with ammonium chloride and ammonium bromide not only enhances the intrinsic activity and density of Fe-N-4 sites, but also introduces numerous defects, trace Br ions and creates mesopores in the carbon framework. Notably, surface Br ions significantly improve the interaction between the ionomer and catalyst particles, promoting ionomer infiltration and optimizing the O-2 transport and charge transfer at triple-phase boundary. This catalyst delivers a high peak power density of 1.86Wcm(-2) and 54mAcm(-2) at 0.9 ViR-free in a H-2-O-2 fuel cells at 80 degrees C. Our findings highlight the critical role of interface microenvironment regulation. Replacing expensive and rare platinum with metal-nitrogen-carbon catalysts in proton exchange membrane fuel cells is limited by their lower activity and stability for oxygen reduction reactions. The authors report Fe-N-C catalyst with trace Br ions to enhance Fe-N4 density and introduce defects and mesopores, achieving high activity for oxygen reduction reaction in proton exchange membrane fuel cell.",,OXYGEN-TRANSPORT RESISTANCE; CATALYTIC-ACTIVITY; C ELECTROCATALYST; ACTIVE-SITES; REDUCTION; FE/N/C; IRON,OXYGEN-TRANSPORT RESISTANCE;CATALYTIC-ACTIVITY;C ELECTROCATALYST;ACTIVE-SITES;REDUCTION;FE/N/C;IRON,rhuang@xmu.edu.cn; yxjiang@xmu.edu.cn; sgsun@xmu.edu.cn,,"HEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY",,,,NATURE PORTFOLIO,,,,39209848,English,NAT COMMUN,Article,WoS,Science & Technology - Other Topics,WOS:001381763500001,2-s2.0-85202778506,China;Taiwan,xmu.edu.cn,Xiamen Univ;Chongqing Univ;Fujian Sci & Technol Innovat Lab Energy Mat China;Chinese Acad Sci;Natl Synchrotron Radiat Res Ctr,"Xiamen Univ, China;Chongqing Univ, China;Fujian Sci & Technol Innovat Lab Energy Mat China, China;Chinese Acad Sci, China;Natl Synchrotron Radiat Res Ctr, Taiwan","Yin, Shuhu; Chen, Long; Yang, Jian; Cheng, Xiaoyang; Zeng, Hongbin; Hong, Yuhao; Huang, Huan; Kuai, Xiaoxiao; Lin, Yangu; Huang, Rui; Jiang, Yanxia; Sun, Shigang"
"Sa, Y.J., Seo, D.J., Woo, J., Lim, J.T., Cheon, J.Y., Yang, S.Y., Lee, J.M., Kang, D., Shin, T.J., Shin, H.S., Jeong, H.Y., Kim, C.S., Kim, M.G., Kim, T.Y., Joo, S.H.",A General Approach to Preferential Formation of Active Fe-Nx Sites in Fe-N/C Electrocatalysts for Efficient Oxygen Reduction Reaction,2016,Journal of the American Chemical Society,138,45,,15046,15056,,727,10.1021/jacs.6b09470,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84996483795&doi=10.1021%2Fjacs.6b09470&partnerID=40&md5=fa8495e857f6643d0e4c900e1b6d1b47,"Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan, South Korea; School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea; Hydrogen and Fuel Cell Department, Korea Institute of Energy Research, Daejeon, South Korea; Ulsan National Institute of Science and Technology, Ulsan, South Korea; Beamline Research Division, Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; Department of Physics, Kookmin University, Seoul, South Korea","Sa, Young Jin, Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan, South Korea; Seo, Dong-jun, Hydrogen and Fuel Cell Department, Korea Institute of Energy Research, Daejeon, South Korea; Woo, Jinwoo, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea; Lim, Jung-tae, Department of Physics, Kookmin University, Seoul, South Korea; Cheon, Jaeyeong, Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan, South Korea; Yang, Seung-yong, Hydrogen and Fuel Cell Department, Korea Institute of Energy Research, Daejeon, South Korea; Lee, Jae-myeong, Hydrogen and Fuel Cell Department, Korea Institute of Energy Research, Daejeon, South Korea; Kang, Dongwoo, Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan, South Korea; Shin, Tae Joo, Ulsan National Institute of Science and Technology, Ulsan, South Korea; Shin, Hyun Suk, Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan, South Korea; Jeong, Hu-young, Ulsan National Institute of Science and Technology, Ulsan, South Korea; Kim, Chulsung, Department of Physics, Kookmin University, Seoul, South Korea; Kim, Min Gyu, Beamline Research Division, Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; Kim, Taeyoung, Hydrogen and Fuel Cell Department, Korea Institute of Energy Research, Daejeon, South Korea; Joo, Sang Hoon, Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan, South Korea, Hydrogen and Fuel Cell Department, Korea Institute of Energy Research, Daejeon, South Korea","Iron-nitrogen on carbon (Fe-N/C) catalysts have emerged as promising nonprecious metal catalysts (NPMCs) for oxygen reduction reaction (ORR) in energy conversion and storage devices. It has been widely suggested that an active site structure for Fe-N/C catalysts contains Fe-N<inf>x</inf> coordination. However, the preparation of high-performance Fe-N/C catalysts mostly involves a high-temperature pyrolysis step, which generates not only catalytically active Fe-N<inf>x</inf> sites, but also less active large iron-based particles. Herein, we report a general ""silica-protective-layer-assisted"" approach that can preferentially generate the catalytically active Fe-N<inf>x</inf> sites in Fe-N/C catalysts while suppressing the formation of large Fe-based particles. The catalyst preparation consisted of an adsorption of iron porphyrin precursor on carbon nanotube (CNT), silica layer overcoating, high-temperature pyrolysis, and silica layer etching, which yielded CNTs coated with thin layer of porphyrinic carbon (CNT/PC) catalysts. Temperature-controlled in situ X-ray absorption spectroscopy during the preparation of CNT/PC catalyst revealed the coordination of silica layer to stabilize the Fe-N<inf>4</inf> sites. The CNT/PC catalyst contained higher density of active Fe-N<inf>x</inf> sites compared to the CNT/PC prepared without silica coating. The CNT/PC showed very high ORR activity and excellent stability in alkaline media. Importantly, an alkaline anion exchange membrane fuel cell (AEMFC) with a CNT/PC-based cathode exhibited record high current and power densities among NPMC-based AEMFCs. In addition, a CNT/PC-based cathode exhibited a high volumetric current density of 320 A cm-3 in acidic proton exchange membrane fuel cell. We further demonstrated the generality of this synthetic strategy to other carbon supports. © 2016 American Chemical Society.",,Alkaline fuel cells; Catalyst activity; Catalysts; Cathodes; Electrocatalysts; Electrodes; Electrolytic reduction; Energy conversion; Fuel cells; Ion exchange membranes; Iron; Proton exchange membrane fuel cells (PEMFC); Pyrolysis; Silica; Virtual storage; X ray absorption spectroscopy; Yarn; Active site structure; Alkaline anion exchange membrane; Energy conversion and storages; High-temperature pyrolysis; In-situ X-ray absorption spectroscopy; Non-precious metal catalysts; Oxygen reduction reaction; Synthetic strategies; Carbon nanotubes; carbon; carbon nanotube; ferric ion; nitrogen; oxygen; anion exchange; Article; catalysis; controlled study; current density; electrocatalysis; electrochemistry; energy conversion; high temperature; oxidation reduction reaction; potentiometry; pyrolysis; synthesis; transmission electron microscopy; X ray photoelectron spectroscopy,Alkaline fuel cells;Catalyst activity;Catalysts;Cathodes;Electrocatalysts;Electrodes;Electrolytic reduction;Energy conversion;Fuel cells;Ion exchange membranes;Iron;Proton exchange membrane fuel cells (PEMFC);Pyrolysis;Silica;Virtual storage;X ray absorption spectroscopy;Yarn;Active site structure;Alkaline anion exchange membrane;Energy conversion and storages;High-temperature pyrolysis;In-situ X-ray absorption spectroscopy;Non-precious metal catalysts;Oxygen reduction reaction;Synthetic strategies;Carbon nanotubes;carbon;carbon nanotube;ferric ion;nitrogen;oxygen;anion exchange;Article;catalysis;controlled study;current density;electrocatalysis;electrochemistry;high temperature;oxidation reduction reaction;potentiometry;synthesis;transmission electron microscopy;X ray photoelectron spectroscopy,"C.S. Kim; Department of Physics, Kookmin University, Seoul, 02707, South Korea; email: cskim@kookmin.ac.kr",,,,,,American Chemical Society service@acs.org,00027863,,JACSA,,English,J. Am. Chem. Soc.,Article,Scopus,,2-s2.0-84996483795,,South Korea,kookmin.ac.kr,,,"Sa, Y.J.; Seo, D.-J.; Woo, J.; Lim, J.T.; Cheon, J.Y.; Yang, S.Y.; Lee, J.M.; Kang, D.; Shin, T.J.; Shin, H.S.; Jeong, H.Y.; Kim, C.S.; Kim, M.G.; Kim, T.-Y.; Joo, S.H."
"Li, Y.Y., Zhang, P.Y., Wan, L.Y., Zheng, Y.P., Qu, X.M., Zhang, H.K., Wang, Y.S., Zaghib, K., Yuan, J.Y., Sun, S.H., Wang, Y.C., Zhou, Z.Y., Sun, S.G.",A General Carboxylate-Assisted Approach to Boost the ORR Performance of ZIF-Derived Fe/N/C Catalysts for Proton Exchange Membrane Fuel Cells,2021,ADVANCED FUNCTIONAL MATERIALS,31,15,2009645,,,7,182,10.1002/adfm.202009645,,"[Li, Yuyang; Zhang, Pengyang; Wan, Liyang; Zheng, Yanping; Qu, Ximing; Zhang, Haikun; Wang, Yucheng; Zhou, Zhiyou; Sun, Shigang] Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Collaborat Innovat Ctr Chem Energy Mat, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China; [Wang, Yuesheng; Zaghib, Karim] Ctr Excellence Transportat Electrificat & & Energ, Varennes, PQ J3X 1S1, Canada; [Yuan, Jiayin] Stockholm Univ, Dept Mat & Environm Chem, S-10691 Stockholm, Sweden; [Sun, Shuhui] Inst Natl Rech Sci Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada; [Wang, Yucheng; Zhou, Zhiyou] Innovat Lab Sci & Technol Energy Mat Fujian Prov, Xiamen 361005, Peoples R China",,"An Fe/N/C catalyst derived from the pyrolysis of metal-organic frameworks, for example, a zeolitic-imidazolate-framework-8 (ZIF-8), has been regarded as one of the most promising non-precious metal catalysts toward oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). However, its ORR mass activity is still much inferior to that of Pt, partly because of the lack of general and efficient synthetic strategies. Herein, a general carboxylate-assisted strategy that dramatically enhances the ORR mass activity of ZIF-derived Fe/N/C catalysts is reported. The carboxylate is found to promote the formation of Fe/N/C catalysts with denser accessible active sites and entangled carbon nanotubes, as well as a higher mesoporosity. These structural advantages make the carboxylate-assisted Fe/N/C catalysts show a 2-10 fold higher ORR mass activity than the common carboxylate-free one in various cases. When applied in H-2-O-2 PEMFCs, the active acetate-assisted Fe/N/C catalyst generates a peak power density of 1.33 W cm(-2), a new record of peak power density for a H-2-O-2 PEMFC with non-Pt ORR catalysts.",carboxylate; Fe; N; C catalysts; fuel cells; metal&#8211; organic frameworks; oxygen reduction reaction,N-C ELECTROCATALYST; OXYGEN REDUCTION; ACTIVE-SITES; CATHODE CATALYSTS; EFFICIENT OXYGEN; IRON; INSIGHT; DENSITY,carboxylate;Fe;N;C catalysts;fuel cells;metal&#8211;organic frameworks;oxygen reduction reaction;N-C ELECTROCATALYST;OXYGEN REDUCTION;ACTIVE-SITES;CATHODE CATALYSTS;EFFICIENT OXYGEN;IRON;INSIGHT;DENSITY,wangyc@xmu.edu.cn; zhouzy@xmu.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1616-301X,,,,English,ADV FUNCT MATER,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000615798400001,2-s2.0-85100523142,China;Canada;Sweden,xmu.edu.cn,Xiamen Univ;Ctr Excellence Transportat Electrificat & & Energ;Stockholm Univ;Inst Natl Rech Sci Energie Mat & Telecommun;Innovat Lab Sci & Technol Energy Mat Fujian Prov,"Xiamen Univ, China;Ctr Excellence Transportat Electrificat & & Energ, Canada;Stockholm Univ, Sweden;Inst Natl Rech Sci Energie Mat & Telecommun, Canada;Innovat Lab Sci & Technol Energy Mat Fujian Prov, China","Li, Yuyang; Zhang, Pengyang; Wan, Liyang; Zheng, Yanping; Qu, Ximing; Zhang, Haikun; Wang, Yuesheng; Zaghib, Karim; Yuan, Jiayin; Sun, Shuhui; Wang, Yucheng; Zhou, Zhiyou; Sun, Shigang"
"Siracusano, S., Giacobello, F., Arico, A.S.",Ag/Ti-suboxides as non-PGM anode electrocatalyst for PEM water electrolysis,2023,Journal of Power Sources,565,,232903,,,,6,10.1016/j.jpowsour.2023.232903,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85149467017&doi=10.1016%2Fj.jpowsour.2023.232903&partnerID=40&md5=56d0dfc302857227b6306dca10aa8e38,"Istituto Di Tecnologie Avanzate Per L'energia, Messina, Messina, ME, Italy","Siracusano, Stefania, Istituto Di Tecnologie Avanzate Per L'energia, Messina, Messina, ME, Italy; Giacobello, Fausta, Istituto Di Tecnologie Avanzate Per L'energia, Messina, Messina, ME, Italy; Aricò, Antonino Salvatore, Istituto Di Tecnologie Avanzate Per L'energia, Messina, Messina, ME, Italy","Minimization of high-cost metal electrocatalyst is necessary to achieve cost-effective green hydrogen production by proton exchange membrane (PEM) water electrolysis (WE). The large increase of the cost of Ir recently observed requires individuating alternative catalyst solutions for the oxygen evolution reaction (OER) in PEMWE. The OER is the rate determining step of the electrolysis process requiring high-cost noble metals with significantly high loading. A non-platinum group metal (non-PGM) anode catalyst based on silver and titanium suboxide was prepared and used for the oxygen evolution reaction in a PEMWE cell. By using a solid-state synthesis procedure, a silver nitrate and titanium suboxides (Ti<inf>n</inf>O<inf>2n-1</inf>) with Magneli phase powders were mixed and subjected thereafter to a thermal treatment at 300 °C in a 50% H<inf>2</inf>/N<inf>2</inf> gas stream to promote the inclusion of silver within the Ti-suboxides structure. A membrane – electrode assembly (MEA), consisting of the anode Ag/Ti<inf>n</inf>O<inf>2n−1</inf> and conventional Pt/C cathode catalysts deposited on a 212 NAFION® membrane (thickness 50 μm), was investigated to assess the performance and durability of the PGM free oxygen evolution catalyst in an acidic environment. A promising performance, of 0.6 A cm−2 at 2 V/cell at 80 °C, and an excellent stability (degradation rate < 14 μV/h during a 1000 h test) were achieved for the electrolysis cell based on a cost-effective metal anode electrocatalyst. © 2023 Elsevier B.V.",Hydrogen production; Non-PGM catalysts; Oxygen evolution reaction; Proton exchange membrane; Water electrolysis,Anodes; Cost effectiveness; Degradation; Electrocatalysts; Electrolysis; Oxygen; Proton exchange membrane fuel cells (PEMFC); Silver compounds; Titanium compounds; Anode electrocatalyst; Cost effective; High costs; Metal anodes; Non-PGM catalysts; Non-platinum; Platinum group metals; Proton exchange membranes; Titania; Water electrolysis; Hydrogen production,Hydrogen production;Non-PGM catalysts;Oxygen evolution reaction;Proton exchange membrane;Water electrolysis;Anodes;Cost effectiveness;Degradation;Electrocatalysts;Electrolysis;Oxygen;Proton exchange membrane fuel cells (PEMFC);Silver compounds;Titanium compounds;Anode electrocatalyst;Cost effective;High costs;Metal anodes;Non-platinum;Platinum group metals;Proton exchange membranes;Titania,"S. Siracusano; CNR-ITAE Institute of Advanced Energy Technologies, National Research Council, Messina, Via Salita S. Lucia Sopra Contesse 5, 98126, Italy; email: siracusano@itae.cnr.it",,,,,,Elsevier B.V.,03787753,0444894810,JPSOD,,English,J Power Sources,Article,Scopus,,2-s2.0-85149467017,,Italy,itae.cnr.it,,,"Siracusano, S.; Giacobello, F.; Arico, A.S."
"Lei, M., Li, P.G., Li, L.H., Tang, W.H.",A highly ordered Fe-N-C nanoarray as a non-precious oxygen-reduction catalyst for proton exchange membrane fuel cells,2011,JOURNAL OF POWER SOURCES,196,7,,3548,3552,5,44,10.1016/j.jpowsour.2010.12.026,,"[Lei, M.; Li, P. G.; Tang, W. H.] Zhejiang Sci Tech Univ, Dept Phys, Ctr Optoelect Mat & Devices, Hangzhou 310018, Peoples R China; [Li, L. H.] Univ Tennessee, Dept Geol Geog & Phys, Martin, TN 38238 USA",,"A highly ordered Pt-free Fe-N-C catalyst is synthesized through a hydrogen bonding-assisted self-assembly route. The catalyst has a porous structure with an average pore size of 5.5 nm and a large surface area of 416 m(2) g(-1), making it highly active in oxygen reduction. Cells assembled with the synthesized catalyst perform significantly better than those assembled with amorphous Fe-N-C cathode catalysts. The maximum powers of cells assembled from the highly ordered and amorphous catalysts are 252 and 60 mW cm(-2), respectively. (C) 2010 Elsevier B.V. All rights reserved.",Highly ordered structure; Non-precious oxygen reduction catalyst; Performance,ACTIVATED CARBON; ELECTROCATALYTIC ACTIVITY; MESOPOROUS CARBON; FACILE SYNTHESIS; SURFACE; NANOPARTICLES; NANOWIRES; SILICA; PEMFCS; ARRAYS,Highly ordered structure;Non-precious oxygen reduction catalyst;Performance;ACTIVATED CARBON;ELECTROCATALYTIC ACTIVITY;MESOPOROUS CARBON;FACILE SYNTHESIS;SURFACE;NANOPARTICLES;NANOWIRES;SILICA;PEMFCS;ARRAYS,whtang@zstu.edu.cn,,"PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS",,,,ELSEVIER SCIENCE BV,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:000289325000023,2-s2.0-79251600902,China;United States,zstu.edu.cn,Zhejiang Sci Tech Univ;Univ Tennessee,"Zhejiang Sci Tech Univ, China;Univ Tennessee, United States","Lei, M.; Li, P. G.; Li, L. H.; Tang, W. H."
"Tang, D.P., Pan, J., Lu, S.F., Zhuang, L., Lu, J.T.","Alkaline polymer electrolyte fuel cells: Principle, challenges, and recent progress",2010,SCIENCE CHINA-CHEMISTRY,53,2,,357,364,8,89,10.1007/s11426-010-0080-5,,"[Tang DaoPing; Pan Jing; Lu ShanFu; Zhuang Lin; Lu JunTao] Wuhan Univ, Coll Chem & Mol Sci, Hubei Key Lab Electrochem Power Sources, Wuhan 430072, Peoples R China",,"Polymer electrolyte membrane fuel cells (PEMFC) have been recognized as a significant power source in future energy systems based on hydrogen. The current PEMFC technology features the employment of acidic polymer electrolytes which, albeit superior to electrolyte solutions, have intrinsically limited the catalysts to noble metals, fundamentally preventing PEMFC from widespread deployment. An effective solution to this problem is to develop fuel cells based on alkaline polymer electrolytes (APEFC), which not only enable the use of non-precious metal catalysts but also avoid the carbonate-precipitate issue which has been troubling the conventional alkaline fuel cells (AFC). This feature article introduces the principle of APEFC, the challenges, and our research progress, and focuses on strategies for developing key materials, including high-performance alkaline polyelectrolytes and stable non-precious metal catalysts. For alkaline polymer electrolytes, high ionic conductivity and satisfactory mechanical property are difficult to be balanced, therefore polymer cross-linking is an ultimate strategy. For non-precious metal catalysts, it is urgent to improve the catalytic activity and stability. New materials, such as transition-metal complexes, nitrogen-doped carbon nanotubes, and metal carbides, would become applicable in APEFC.",fuel cells; polymer electrolyte; anion exchange membrane; catalyst; non-precious metal,ANION-EXCHANGE MEMBRANES; OXYGEN REDUCTION; MONOLAYER ELECTROCATALYSTS; METAL; PD; PLATINUM; CATALYSTS; DESIGN,fuel cells;polymer electrolyte;anion exchange membrane;catalyst;non-precious metal;ANION-EXCHANGE MEMBRANES;OXYGEN REDUCTION;MONOLAYER ELECTROCATALYSTS;METAL;PD;PLATINUM;CATALYSTS;DESIGN,lzhuang@whu.edu.cn,,"16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA",,,,SCIENCE PRESS,1674-7291,,,,English,SCI CHINA CHEM,Article,WoS,Chemistry,WOS:000276578900009,2-s2.0-77950948354,China,whu.edu.cn,Wuhan Univ,"Wuhan Univ, China",Tang DaoPing; Pan Jing; Lu ShanFu; Zhuang Lin; Lu JunTao
"Peng, H., Li, Q., Hu, M., Xiao, L., Lu, J., Zhuang, L.",Alkaline polymer electrolyte fuel cells stably working at 80 °C,2018,Journal of Power Sources,390,,,165,167,,326,10.1016/j.jpowsour.2018.04.047,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85045703992&doi=10.1016%2Fj.jpowsour.2018.04.047&partnerID=40&md5=e49db210f3ca636fb57846a0b6b30b2b,"Hubei Key Lab of Electrochemical Power Sources, Wuhan University, Wuhan, Hubei, China; Wuhan University, Wuhan, Hubei, China","Peng, Hanqing, Hubei Key Lab of Electrochemical Power Sources, Wuhan University, Wuhan, Hubei, China; Li, Qihao, Hubei Key Lab of Electrochemical Power Sources, Wuhan University, Wuhan, Hubei, China; Hu, Meixue, Hubei Key Lab of Electrochemical Power Sources, Wuhan University, Wuhan, Hubei, China; Xiao, Li, Hubei Key Lab of Electrochemical Power Sources, Wuhan University, Wuhan, Hubei, China; Lu, Juntao, Hubei Key Lab of Electrochemical Power Sources, Wuhan University, Wuhan, Hubei, China; Zhuang, Lin, Hubei Key Lab of Electrochemical Power Sources, Wuhan University, Wuhan, Hubei, China, Wuhan University, Wuhan, Hubei, China","Alkaline polymer electrolyte fuel cells are a new class of polymer electrolyte fuel cells that fundamentally enables the use of nonprecious metal catalysts. The cell performance mostly relies on the quality of alkaline polymer electrolytes, including the ionic conductivity and the chemical/mechanical stability. For a long time, alkaline polymer electrolytes are thought to be too weak in stability to allow the fuel cell to be operated at elevated temperatures, e.g., above 60 °C. In the present work, we report a progress in the state-of-the-art alkaline polymer electrolyte fuel cell technology. By using a newly developed alkaline polymer electrolyte, quaternary ammonia poly (N-methyl-piperidine-co-p-terphenyl), which simultaneously possesses high ionic conductivity and excellent chemical/mechanical stability, the fuel cell can now be stably operated at 80 °C with high power density. The peak power density reaches ca. 1.5 W/cm2 at 80 °C with Pt/C catalysts used in both the anode and the cathode. The cell works stably in a period of study over 100 h. © 2018 Elsevier B.V.",,Alkaline fuel cells; Alkalinity; Ammonia; Catalysts; Chemical stability; Electrodes; Gas fuel purification; Ionic conductivity; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Alkaline polymer electrolyte fuel cells; Cell performance; Elevated temperature; High power density; Non-precious metal catalysts; Peak power densities; Polymer electrolyte; Polymer electrolyte fuel cells; Polyelectrolytes,Alkaline fuel cells;Alkalinity;Ammonia;Catalysts;Chemical stability;Electrodes;Gas fuel purification;Ionic conductivity;Proton exchange membrane fuel cells (PEMFC);Solid electrolytes;Alkaline polymer electrolyte fuel cells;Cell performance;Elevated temperature;High power density;Non-precious metal catalysts;Peak power densities;Polymer electrolyte;Polymer electrolyte fuel cells;Polyelectrolytes,"L. Zhuang; College of Chemistry and Molecular Sciences, Hubei Key Lab of Electrochemical Power Sources, Wuhan University, Wuhan, 430072, China; email: lzhuang@whu.edu.cn",,,,,,Elsevier B.V.,03787753,0444894810,JPSOD,,English,J Power Sources,Article,Scopus,,2-s2.0-85045703992,,China,whu.edu.cn,,,"Peng, H.; Li, Q.; Hu, M.; Xiao, L.; Lu, J.; Zhuang, L."
"Gao, H., Jiang, Y., Chen, R., Dong, C.L., Huang, Y.C., Ma, M., Shi, Z., Liu, J., Zhang, Z., Qiu, M., Wu, T., Wang, J., Jiang, Y., Chen, J., An, X., He, Y., Wang, S.",Alloyed Pt Single-Atom Catalysts for Durable PEM Water Electrolyzer,2023,Advanced Functional Materials,33,46,2214795,,,,39,10.1002/adfm.202214795,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85163412768&doi=10.1002%2Fadfm.202214795&partnerID=40&md5=5081025d4017d21863d1180798d4f077,"State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Hunan University, Changsha, Hunan, China; Hunan University, Changsha, Hunan, China; Department of Physics, Tamkang University, Taipei, Taiwan; Australian Institute for Innovative Materials, University of Wollongong, Wollongong, NSW, Australia","Gao, Hongmei, State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Hunan University, Changsha, Hunan, China; Jiang, Yimin, State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Hunan University, Changsha, Hunan, China; Chen, Ru, State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Hunan University, Changsha, Hunan, China, Hunan University, Changsha, Hunan, China; Dong, Chungli, Department of Physics, Tamkang University, Taipei, Taiwan; Huang, Yucheng, Department of Physics, Tamkang University, Taipei, Taiwan; Ma, Mingyu, State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Hunan University, Changsha, Hunan, China; Shi, Zude, State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Hunan University, Changsha, Hunan, China; Liu, Jiaqi, State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Hunan University, Changsha, Hunan, China; Zhang, Zijin, State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Hunan University, Changsha, Hunan, China; Qiu, Mengyi, State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Hunan University, Changsha, Hunan, China; Wu, Tianyu, State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Hunan University, Changsha, Hunan, China; Wang, Jinbo, State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Hunan University, Changsha, Hunan, China; Jiang, Yubin, State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Hunan University, Changsha, Hunan, China; Chen, Jun, Australian Institute for Innovative Materials, University of Wollongong, Wollongong, NSW, Australia; An, Xiuyun, State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Hunan University, Changsha, Hunan, China; He, Yongmin, State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Hunan University, Changsha, Hunan, China; Wang, Shuangyin, State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Hunan University, Changsha, Hunan, China","The high cost of noble metals is one of the key factors hindering the large-scale application of proton exchange membrane (PEM) water electrolyzer for hydrogen production. Recently, single-atom catalysts (SACs) with a potential of maximum atom utilization efficiency enable lowering the metal amount as much as possible; unfortunately, their durability remains a challenge under PEM water electrolyzer working conditions. Herein, a highly-stable alloyed Pt SAC is demonstrated through a plasma-assisted alloying strategy and applies to a PEM water electrolyzer. In this catalyst, single Pt atoms are firmly anchored onto a Ru support via a robust metal–metal bonding strength, as evidenced by these complementary characterizations. This SAC is used in a PEM water electrolyzer system to achieve a cell voltage as low as 1.8 V at 1000 mA cm−2. Impressively, it can operate over 1000 h without obvious decay, and the catalyst is present in the form of individual Pt atoms. To the knowledge, this will be the first SAC attempt at a cell level toward long-term PEM. This work paves the way for designing durable SACs employed in the actual working condition in the PEM water electrolyzer. © 2023 Wiley-VCH GmbH.",alloyed single-atom catalysts; proton exchange membrane water electrolyzers; real working conditions; ultra-low Pt,Atoms; Electrolytic cells; Hydrogen production; Metal working; Platinum alloys; Proton exchange membrane fuel cells (PEMFC); Alloyed single-atom catalyst; Condition; Electrolyzers; Proton exchange membrane water electrolyzers; Proton exchange membranes; Real working condition; Single-atoms; Ultra-low pt; Water electrolyzer; ]+ catalyst; Catalysts,alloyed single-atom catalysts;proton exchange membrane water electrolyzers;real working conditions;ultra-low Pt;Atoms;Electrolytic cells;Hydrogen production;Metal working;Platinum alloys;Proton exchange membrane fuel cells (PEMFC);Alloyed single-atom catalyst;Condition;Electrolyzers;Proton exchange membrane water electrolyzers;Proton exchange membranes;Real working condition;Single-atoms;Water electrolyzer;]+ catalyst;Catalysts,"R. Chen; State Key Laboratory of Chem/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, National Supercomputer Centers in Changsha, Hunan University, Changsha, Hunan, 410082, China; email: chenru@hnu.edu.cn; Y. He; State Key Laboratory of Chem/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, National Supercomputer Centers in Changsha, Hunan University, Changsha, Hunan, 410082, China; email: ymhe@hnu.edu.cn; S. Wang; State Key Laboratory of Chem/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, National Supercomputer Centers in Changsha, Hunan University, Changsha, Hunan, 410082, China; email: shuangyinwang@hnu.edu.cn",,,,,,John Wiley and Sons Inc,1616301X,,AFMDC,,English,Adv. Funct. Mater.,Article,Scopus,,2-s2.0-85163412768,,China;Taiwan;Australia,hnu.edu.cn,,,"Gao, H.; Jiang, Y.; Chen, R.; Dong, C.-L.; Huang, Y.-C.; Ma, M.; Shi, Z.; Liu, J.; Zhang, Z.; Qiu, M.; Wu, T.; Wang, J.; Jiang, Y.; Chen, J.; An, X.; He, Y.; Wang, S."
"Xue, D., Yuan, P., Jiang, S., Wei, Y., Zhou, Y., Dong, C.L., Yan, W., Mu, S., Zhang, J.N.",Altering the spin state of Fe-N-C through ligand field modulation of single-atom sites boosts the oxygen reduction reaction,2023,Nano Energy,105,,108020,,,,140,10.1016/j.nanoen.2022.108020,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85142682906&doi=10.1016%2Fj.nanoen.2022.108020&partnerID=40&md5=fa097ff37da96e6962900081c3d4291e,"School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, Henan, China; Department of Physics, Tamkang University, Taipei, Taiwan; State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Changchun, Jilin, China; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan, Hubei, China","Xue, Dongping, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Yuan, Pengfei, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, Henan, China; Jiang, Su, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Wei, Yifan, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Zhou, Ying, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Dong, Chungli, Department of Physics, Tamkang University, Taipei, Taiwan; Yan, Wenfu, State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Changchun, Jilin, China; Mu, Shichun, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan, Hubei, China; Zhang, Jianan, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China","Atomically dispersed Fe-N-C catalysts are the most promising candidates alternatively to Pt-based catalysts for oxygen reduction reaction (ORR). However, the ORR activity of Fe-N<inf>x</inf> electrocatalysts in acid are still far from satisfactory; thus far, although some discussions demonstrate the important role of ligand fields of single atom metal-N-C sites on improving catalytic properties, the behind mechanism is still ambiguous. Herein, based on the ligand field theory, the electron spin-state modulation of Fe active centers in SA Fe-N-C achieved from a low-spin state (LS) for FeN<inf>5</inf> (Fe-N<inf>5</inf>-LS) to a high-spin state (HS) for FeN<inf>4</inf> (Fe-N<inf>4</inf>-HS) and FeN<inf>3</inf> (Fe-N<inf>3</inf>-HS) was realized by converting defect-rich pyrrolic N-coordinated FeN<inf>x</inf> sites, which tune the electron readily penetrating the antibonding π-orbital of oxygen. The Fe-N<inf>4</inf>-HS exhibits a 3d-electronic structure of t<inf>2g</inf>3<inf>eg</inf>2 and significantly accelerate the ORR reaction kinetics. Taking advantage of activity-boosting high spin state (S<inf>5/2</inf>) of Fe (III), the designed Fe-N<inf>4</inf>-HS (with two longitudinal parallel coordinated pyrr-N and pyri-N, respectively) catalyst displays excellent ORR activity, which is comparable to commercial Pt/C catalyst. In addition, Fe-N<inf>4</inf>-HS presents higher proton exchange membrane fuel cell (PEMFC) and Zn-air battery performances than most non-precious-metal electrocatalysts. Our findings provide fundamental and technological insights into the correlation between the electronic spin states/geometric structure and high-efficiency SA Fe-N-C catalysts for ORR process. © 2022 Elsevier Ltd",d-band center; Electron-spin state; Fe-N-C catalysts; Ligand field modulation; Oxygen reduction reaction,Electrolytic reduction; Electronic structure; Electrospinning; Iron compounds; Ligands; Magnetic moments; Modulation; Oxygen; Polyelectrolytes; Reaction kinetics; Spin dynamics; D-band centers; Electron-spin state; Fe-N-C catalyst; Field modulation; High spin state; Ligand field modulation; Ligand-field; Oxygen reduction reaction; ]+ catalyst; Electrocatalysts,d-band center;Electron-spin state;Fe-N-C catalysts;Ligand field modulation;Oxygen reduction reaction;Electrolytic reduction;Electronic structure;Electrospinning;Iron compounds;Ligands;Magnetic moments;Modulation;Oxygen;Polyelectrolytes;Reaction kinetics;Spin dynamics;D-band centers;Fe-N-C catalyst;Field modulation;High spin state;Ligand-field;]+ catalyst;Electrocatalysts,"J.-N. Zhang; School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China; email: zjn@zzu.edu.cn",,,,,,Elsevier Ltd,22112855,,,,English,Nano Energy,Article,Scopus,,2-s2.0-85142682906,,China;Taiwan,zzu.edu.cn,,,"Xue, D.; Yuan, P.; Jiang, S.; Wei, Y.; Zhou, Y.; Dong, C.-L.; Yan, W.; Mu, S.; Zhang, J.-N."
"Shi, W., Wang, Y.C., Chen, C., Yang, X.D., Zhou, Z.Y., Sun, S.G.",A mesoporous Fe/N/C ORR catalyst for polymer electrolyte membrane fuel cells,2016,CHINESE JOURNAL OF CATALYSIS,37,7,,1103,1108,6,36,10.1016/S1872-2067(16)62471-3,,"[Shi, Wei; Wang, Yu-Cheng; Chen, Chi; Yang, Xiao-Dong; Zhou, Zhi-You; Sun, Shi-Gang] Xiamen Univ, Coll Chem & Chem Engn, Collaborat Innovat Ctr Chem Energy Mat, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Fujian, Peoples R China; [Chen, Chi] E China Univ Sci & Technol, Coll Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China",,"Fe/N/C is a promising non-platinum catalyst for the oxygen reduction reaction (ORR). Even so, mass transfer remains a challenge in the application of Fe/N/C to proton exchange membrane fuel cells, due to the high catalyst loadings required. In the present work, mesoporous Fe/N/C was synthesized through heat treatment of KJ600 carbon black coated with poly-2-aminobenzimidazole and FeCl3. The as-prepared Fe/N/C possesses a unique hollow-shell structure that contains a buffer zone allowing both water formation and vaporization, and also facilitates the mass transfer of gaseous oxygen. This catalyst generated an oxygen reduction reaction activity of 9.21 A/g in conjunction with a peak power density of 0.71 W/cm(2). (C) 2016, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.",Fe/N/C catalyst; Non-platinum catalyst; Oxygen reduction reaction; Mesopore; Hollow-shell structure,OXYGEN REDUCTION; IRON; ELECTROCATALYSTS; DENSITY; SITES,Fe/N/C catalyst;Non-platinum catalyst;Oxygen reduction reaction;Mesopore;Hollow-shell structure;OXYGEN REDUCTION;IRON;ELECTROCATALYSTS;DENSITY;SITES,xiaodong_yang@xmu.edu.cn; zhouzy@xmu.edu.cn,,"16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA",,,,SCIENCE PRESS,0253-9837,,,,English,CHINESE J CATAL,Article,WoS,Chemistry; Engineering,WOS:000378972100015,2-s2.0-84975104962,China,xmu.edu.cn,Xiamen Univ;E China Univ Sci & Technol,"Xiamen Univ, China;E China Univ Sci & Technol, China","Shi, Wei; Wang, Yu-Cheng; Chen, Chi; Yang, Xiao-Dong; Zhou, Zhi-You; Sun, Shi-Gang"
"Wan, X.J., Wu, R., Deng, J.H., Nie, Y., Chen, S.G., Ding, W., Huang, X., Wei, Z.D.",A metal-organic framework derived 3D hierarchical Co/N-doped carbon nanotube/nanoparticle composite as an active electrocatalyst for oxygen reduction in alkaline electrolyte,2018,JOURNAL OF MATERIALS CHEMISTRY A,6,8,,3386,3390,5,95,10.1039/c7ta10022a,,"[Wan, Xiaoju; Wu, Rui; Deng, Jianghai; Nie, Yao; Chen, Siguo; Ding, Wei; Huang, Xun; Wei, Zidong] Chongqing Univ, Coll Chem & Chem Engn, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing 400044, Peoples R China",,"Here, we have successfully prepared a 3D hierarchical Co/N-doped carbon nanotube/nanoparticle composite as a high-performance electrocatalyst toward the oxygen reduction reaction (ORR), via pyrolysis of bimetallic Co, Zn-zeolitic imidazolate (Co, Zn-ZIF) crystals coated on the surface of silica templates. The resultant 3D Co/NCNTs-Zn/Co catalyst shows comparable ORR activity, better durability and stronger methanol tolerance compared to the state-of-the-art Pt/C catalyst in alkaline media.",,RESONANT RAMAN-SPECTRA; PEM FUEL-CELLS; FREE CATALYSTS; FE-N/C; NANOTUBES; COBALT; NANOSTRUCTURES; NITROGEN,RESONANT RAMAN-SPECTRA;PEM FUEL-CELLS;FREE CATALYSTS;FE-N/C;NANOTUBES;COBALT;NANOSTRUCTURES;NITROGEN,zdwei@cqu.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000425623600011,,China,cqu.edu.cn,Chongqing Univ,"Chongqing Univ, China","Wan, Xiaoju; Wu, Rui; Deng, Jianghai; Nie, Yao; Chen, Siguo; Ding, Wei; Huang, Xun; Wei, Zidong"
"Wan, L.Y., Chen, W.K., Xu, H., Wang, Y.C., Yuan, J.Y., Zhou, Z.Y., Sun, S.G.",A Mild CO2 Etching Method To Tailor the Pore Structure of Platinum-Free Oxygen Reduction Catalysts in Proton Exchange Membrane Fuel Cells,2021,ACS APPLIED MATERIALS & INTERFACES,13,38,,45661,45669,9,24,10.1021/acsami.1c14709,,"[Wan, Liyang; Chen, Weikun; Xu, Hui; Wang, Yucheng; Zhou, Zhiyou; Sun, Shigang] Xiamen Univ, Coll Chem & Chem Engn, Collaborat Innovat Ctr Chem Energy Mat, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China; [Yuan, Jiayin] Stockholm Univ, Dept Mat & Environm Chem, S-10691 Stockholm, Sweden; [Wang, Yucheng; Zhou, Zhiyou] Innovat Lab Sci & Technol Energy Mat Fujian Prov, Xiamen 361005, Peoples R China",,"The structural tailoring of pores is essential to high-performance Fe/N/C electrocatalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells. Current strategies for pore structure engineering are usually accompanied with a drastic change of the intrinsic activity-related surface, which may mask the real effects of the porous structure on ORR activity. Herein, a mild carbon dioxide (CO2) etching method was used to flexibly tailor the pore structure of Fe/N/C electrocatalysts without drastic changes in their surface structure and property. In this way, via employing the Fe/N/C electrocatalysts as a model, the intrinsic impact of the pore structure on ORR activity was revealed. In addition, the CO2 etching method developed a high-quality electrocatalyst (sample Fe/N/C-5% CO2) with polarization performance exceeding that of the commercial Pt/C catalyst in the fuel cell working voltage region (>0.65 V). This work will promote the ongoing intensive studies on the rational design of the pore structures in the Fe/N/C electrocatalysts.",fuel cells; oxygen reduction reaction; Fe/N/C electrocatalysts; CO2 etching; pore structure,N-C ELECTROCATALYST; ACTIVE-SITES; DOPED CARBON; PERFORMANCE; IRON; ORR; POLYANILINE,fuel cells;oxygen reduction reaction;Fe/N/C electrocatalysts;CO2 etching;pore structure;N-C ELECTROCATALYST;ACTIVE-SITES;DOPED CARBON;PERFORMANCE;IRON;ORR;POLYANILINE,wangyc@xmu.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1944-8244,,,34524813,English,ACS APPL MATER INTER,Article,WoS,Science & Technology - Other Topics; Materials Science,WOS:000703995900052,2-s2.0-85116039599,China;Sweden,xmu.edu.cn,Xiamen Univ;Stockholm Univ;Innovat Lab Sci & Technol Energy Mat Fujian Prov,"Xiamen Univ, China;Stockholm Univ, Sweden;Innovat Lab Sci & Technol Energy Mat Fujian Prov, China","Wan, Liyang; Chen, Weikun; Xu, Hui; Wang, Yucheng; Yuan, Jiayin; Zhou, Zhiyou; Sun, Shigang"
"Kwak, D.H., Han, S.B., Kim, D.H., Won, J.E., Park, K.W.",Amino acid-derived non-precious catalysts with excellent electrocatalytic performance and methanol tolerance in oxygen reduction reaction,2018,Applied Catalysis B: Environmental,238,,,93,103,,40,10.1016/j.apcatb.2018.07.013,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85049634339&doi=10.1016%2Fj.apcatb.2018.07.013&partnerID=40&md5=5682da96281a6bc73e04db23dea15f40,"Department of Chemical Engineering, Soongsil University, Seoul, South Korea","Kwak, Da-hee, Department of Chemical Engineering, Soongsil University, Seoul, South Korea; Han, Sang Beotn, Department of Chemical Engineering, Soongsil University, Seoul, South Korea; Kim, Do-hyoung, Department of Chemical Engineering, Soongsil University, Seoul, South Korea; Won, Ji-eun, Department of Chemical Engineering, Soongsil University, Seoul, South Korea; Park, Kyung-won, Department of Chemical Engineering, Soongsil University, Seoul, South Korea","In polymer electrolyte membrane fuel cells (PEMFCs), slow kinetics and high over-potential of oxygen reduction reaction (ORR) can result in a significantly large amount of Pt usage. Thus, non-precious metal (NPM) catalysts, especially, for ORR, that can be utilized instead of Pt-based catalysts, have been intensively studied. Herein, doped carbon nanostructures as NPM catalysts for ORR in an acid medium were synthesized using a template method with nontoxic, eco-friendly cysteine and iron (III) tetramethoxyphenylporphyrin (Fe-TMPP, 5,10,15,20-tetrakis(4-methoxyphenyl)-21H,23H-porphyrin iron(III) chloride) used as carbon and doping sources, respectively. To obtain the doped mesoporous carbon nanostructure, mixtures of cysteine and Fe-TMPP with intended ratios (Cys<inf>X</inf>/Fe<inf>Z</inf>) were heated under an N<inf>2</inf> atmosphere at 900 °C for 3 h. In particular, Cys2/Fe0.3/C synthesized with an appropriate ratio of cysteine and Fe-TMPP showed a relatively high specific surface area and fairly high portion of doped species such as pyridinic and pyrrolic N, thiophenic S, and Fe-N<inf>x</inf>. Moreover, Cys2/Fe0.3/C exhibited significantly enhanced ORR activity and stability in 0.5 M H<inf>2</inf>SO<inf>4</inf> and superior tolerance of methanol in 0.5 M H<inf>2</inf>SO<inf>4</inf> in the presence of CH<inf>3</inf>OH. © 2018 Elsevier B.V.",Cysteine; Doped carbon nanostructure; Methanol tolerance; Non-precious metal catalyst; Oxygen reduction reaction,Amino acids; Carbon; Chlorine compounds; Electrolytic reduction; Methanol; Nanocatalysts; Nanostructures; Oxygen; Polyelectrolytes; Precious metals; Proton exchange membrane fuel cells (PEMFC); Reaction kinetics; Cysteine; Doped carbons; Methanol tolerance; Non-precious metal catalysts; Oxygen reduction reaction; Iron compounds,Cysteine;Doped carbon nanostructure;Methanol tolerance;Non-precious metal catalyst;Oxygen reduction reaction;Amino acids;Carbon;Chlorine compounds;Electrolytic reduction;Methanol;Nanocatalysts;Nanostructures;Oxygen;Polyelectrolytes;Precious metals;Proton exchange membrane fuel cells (PEMFC);Reaction kinetics;Doped carbons;Non-precious metal catalysts;Iron compounds,"K.-W. Park; Department of Chemical Engineering, Soongsil University, Seoul, 156-743, South Korea; email: kwpark@ssu.ac.kr",,,,,,Elsevier B.V.,09263373,,ACBEE,,English,Appl. Catal. B Environ.,Article,Scopus,,2-s2.0-85049634339,,South Korea,ssu.ac.kr,,,"Kwak, D.-H.; Han, S.-B.; Kim, D.-H.; Won, J.-E.; Park, K.-W."
"Ding, S.C., Lyu, Z.Y., Sarnello, E., Xu, M.J., Fang, L.Z., Tian, H.Y., Karcher, S.E., Li, T., Pan, X.Q., McCloy, J., Ding, G.D., Zhang, Q., Shi, Q.R., Du, D., Li, J.C., Zhang, X., Lin, Y.H.",A MnOx enhanced atomically dispersed iron-nitrogen-carbon catalyst for the oxygen reduction reaction,2022,JOURNAL OF MATERIALS CHEMISTRY A,10,11,,5981,5989,9,29,10.1039/d1ta07219f,,"[Ding, Shichao; Lyu, Zhaoyuan; Tian, Hangyu; Karcher, Sam Ellery; McCloy, John; Shi, Qiurong; Du, Dan; Li, Jin-Cheng; Lin, Yuehe] Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA; [Sarnello, Erik; Fang, Lingzhe; Li, Tao] Northern Illinois Univ, Dept Chem & Biochem, De Kalb, IL 60115 USA; [Xu, Mingjie; Pan, Xiaoqing] Univ Calif Irvine, Irvine Mat Res Inst IMRI, Dept Mat Sci & Engn, Irvine, CA 92697 USA; [Li, Tao] Argonne Natl Lab, Xray Sci Div, Lemont, IL 60439 USA; [Ding, Guodong; Zhang, Qiang; Lin, Yuehe] Washington State Univ, Dept Chem, Pullman, WA 99164 USA; [Zhang, Xiao; Lin, Yuehe] Washington State Univ, Sch Chem Engn & Bioengn, Pullman, WA 99164 USA",,"Cost-effective and highly efficient Fe-N-C single-atom catalysts (SACs) have been considered to be one of the most promising potential Pt substitutes for the cathodic oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). Nevertheless, they are subject to severe oxidative corrosion originating from the Fenton reaction, leading to poor long-time durability of PEMFCs. Herein, we propose a MnOx engineered Fe-N-C SAC (Mn-Fe-N-C SAC) to reduce and even eliminate the stability issue, as MnOx accelerates the degradation of the H2O2 by-product via a disproportionation reaction to weaken the Fenton reaction. As a result, the Mn-Fe-N-C SAC shows an ultralow H2O2 yield and a negligible half-wave potential shift after 10 000 continuous potential cycles, demonstrating excellent ORR stability. Besides, the Mn-Fe-N-C SAC also shows an improved ORR activity compared to the common Fe-N-C SAC. Results show that the MnOx interacts with the Fe-N-x site, possibly forming Fe-Mn or Fe-O-Mn bonds, and enhances the intrinsic activity of single iron sites. This work provides a method to overcome the stability problem of Fe-N-C SACs while still yielding excellent catalytic activity, thus showing great promise for application in PEMFCs.",,SINGLE-ATOM CATALYSTS; DOPED CARBON; N-C; ACTIVE-SITES; ELECTROCATALYST; FE; NANOWIRES; AEROGELS,SINGLE-ATOM CATALYSTS;DOPED CARBON;N-C;ACTIVE-SITES;ELECTROCATALYST;FE;NANOWIRES;AEROGELS,jin-cheng.li@wsu.edu; x.zhang@wsu.edu; yuehe.lin@wsu.edu,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000719440300001,2-s2.0-85127332068,United States,wsu.edu,Washington State Univ;Northern Illinois Univ;Univ Calif Irvine;Argonne Natl Lab,"Washington State Univ, United States;Northern Illinois Univ, United States;Univ Calif Irvine, United States;Argonne Natl Lab, United States","Ding, Shichao; Lyu, Zhaoyuan; Sarnello, Erik; Xu, Mingjie; Fang, Lingzhe; Tian, Hangyu; Karcher, Sam Ellery; Li, Tao; Pan, Xiaoqing; McCloy, John; Ding, Guodong; Zhang, Qiang; Shi, Qiurong; Du, Dan; Li, Jin-Cheng; Zhang, Xiao; Lin, Yuehe"
"Baricci, A., Bisello, A., Serov, A., Odgaard, M., Atanassov, P., Casalegno, A.",Analysis of the effect of catalyst layer thickness on the performance and durability of platinum group metal-free catalysts for polymer electrolyte membrane fuel cells,2019,SUSTAINABLE ENERGY & FUELS,3,12,,3375,3386,12,38,10.1039/c9se00252a,,"[Baricci, Andrea; Bisello, Andrea; Casalegno, Andrea] Politecn Milan, Dipartimento Energia, Via Lambruschini 4, I-20156 Milan, Italy; [Serov, Alexey] Pajarito Powder LLC, 3600 Osuna Rd NE,Suite 309, Albuquerque, NM 87109 USA; [Odgaard, Madeleine] IRD Fuel Cells AS, Emil Neckelmanns Vej 15 A&B, DK-5220 Odense SO, Denmark; [Atanassov, Plamen] Univ Calif Irvine, NFCRC, Dept Chem & Biomol Engn, Irvine, CA 92697 USA",,"Development of platinum group metal-free catalysts for polymer electrolyte membrane fuel cells is a critical target to obtain a high market share of fuel cell electric vehicles in the long term. Recent studies have proved the feasibility of new materials with high catalytic activity towards the oxygen reduction reaction, which are based on Earth-abundant and low-cost elements. The stability of these materials is now the major concern at the current state of the art: in the initial hundreds of hours of operation, in fact, a significant loss of catalyst activity is observed. In the present work, the analysis of performance and degradation of cathode catalyst layers based on metal-nitrogen-carbon materials is carried out for 150 hours. The effects of catalyst loading and ionomer content are being analyzed. Electrochemical impedance spectroscopy is adopted to gain insight into the ageing and the results are interpreted by means of a 1D physics-based model. A regime is reported to occur, in which ion, electron and oxygen transport limitations interplay and the effect of each phenomenon is distinguished on the impedance spectra and polarization curves. Degradation is shown to mainly affect the catalyst activity or the density of active sites, but also a loss of electrical and ionic conductivity is observed.",,OXYGEN REDUCTION REACTION; N-C CATALYST; FREE ELECTROCATALYSTS; DIFFUSION; IMPEDANCE; CATHODE; MODEL; DEGRADATION; GRADIENT; IRON,OXYGEN REDUCTION REACTION;N-C CATALYST;FREE ELECTROCATALYSTS;DIFFUSION;IMPEDANCE;CATHODE;MODEL;DEGRADATION;GRADIENT;IRON,andrea.baricci@polimi.it,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2398-4902,,,,English,SUSTAIN ENERG FUELS,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000498612600011,2-s2.0-85075346607,Italy;United States;Denmark,polimi.it,Politecn Milan;Pajarito Powder LLC;IRD Fuel Cells AS;Univ Calif Irvine,"Politecn Milan, Italy;Pajarito Powder LLC, United States;IRD Fuel Cells AS, Denmark;Univ Calif Irvine, United States","Baricci, Andrea; Bisello, Andrea; Serov, Alexey; Odgaard, Madeleine; Atanassov, Plamen; Casalegno, Andrea"
"Kramm, U.I., Lefevre, M., Bogdanoff, P., Schmeisser, D., Dodelet, J.P.",Analyzing Structural Changes of Fe-N-C Cathode Catalysts in PEM Fuel Cell by Mossbauer Spectroscopy of Complete Membrane Electrode Assemblies,2014,JOURNAL OF PHYSICAL CHEMISTRY LETTERS,5,21,,3750,3756,7,96,10.1021/jz501955g,,"[Kramm, Ulrike I.; Schmeisser, Dieter] Brandenburg Tech Univ Cottbus Senftenberg, Chair Appl Phys & Sensors, D-03046 Cottbus, Germany; [Lefevre, Michel] Canet Electrocatalysis Inc, Varennes, PQ J3X 1S2, Canada; [Bogdanoff, Peter] Helmholtz Ctr Berlin Mat & Energy, D-14109 Berlin, Germany; [Dodelet, Jean-Pol] INRS Energie, Mat & Telecommun, Varennes, PQ J3X 1S2, Canada",,"The applicability of analyzing by MoBbauer spectroscopy the structural changes of Fe-N-C catalysts that have been tested at the cathode of membrane electrode assemblies in proton exchange membrane (PEM) fuel cells is demonstrated. The MoBbauer characterization of powders of the same catalysts was recently described in our previous publication. A possible change of the iron species upon testing in fuel cell was investigated here by MoBbauer spectroscopy, energy-dispersive X-ray cross-sectional imaging, and neutron activation analysis. Our results show that the absorption probability of gamma rays by the iron nuclei in Fe-N-C is strongly affected by the presence of Nafion and water content. A detailed investigation of the effect of an oxidizing treatment (1.2 V) of the non-noble cathode in PEM fuel cell indicates that the observed activity decay is mainly attributable to carbon oxidation causing a leaching of active iron sites hosted in the carbon matrix.",,OXYGEN REDUCTION REACTION; FE/N/C-CATALYSTS; IRON; CARBON; ELECTROCATALYSTS; DENSITY; SITES; POLYANILINE; ORR,OXYGEN REDUCTION REACTION;FE/N/C-CATALYSTS;IRON;CARBON;ELECTROCATALYSTS;DENSITY;SITES;POLYANILINE;ORR,kramm@tu-cottbus.de; dodelet@emt.inrs.ca,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1948-7185,,,26278745,English,J PHYS CHEM LETT,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000344579500031,,Germany;Canada,tu-cottbus.de,Brandenburg Tech Univ Cottbus Senftenberg;Canet Electrocatalysis Inc;Helmholtz Ctr Berlin Mat & Energy;INRS Energie,"Brandenburg Tech Univ Cottbus Senftenberg, Germany;Canet Electrocatalysis Inc, Canada;Helmholtz Ctr Berlin Mat & Energy, Germany;INRS Energie, Canada","Kramm, Ulrike I.; Lefevre, Michel; Bogdanoff, Peter; Schmeisser, Dieter; Dodelet, Jean-Pol"
"Zhou, G., Jiang, Y., Qiu, F.",A new Co-Ni/AC catalyst for selective oxidation of carbon monoxide in excess hydrogen,2005,Chinese Journal of Catalysis,26,2,,93,95,,2,,https://www.scopus.com/inward/record.uri?eid=2-s2.0-33750588548&partnerID=40&md5=6fa5690b59dec3b35c085eda70df7620,"Chengdu Institute of Organic Chemistry Chinese Academy of Sciences, Chengdu, Sichuan, China; Graduate School of the Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing, China","Zhou, Guilin, Chengdu Institute of Organic Chemistry Chinese Academy of Sciences, Chengdu, Sichuan, China, Graduate School of the Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing, China; Jiang, Yi, Chengdu Institute of Organic Chemistry Chinese Academy of Sciences, Chengdu, Sichuan, China; Qiu, Fali, Chengdu Institute of Organic Chemistry Chinese Academy of Sciences, Chengdu, Sichuan, China","The removal of CO in the reformates of polymer electrolyte membrane fuel cell to a trace level is essential to avoid the poisoning of the anode catalyst in the cells. A new Activated (AC)-supported non-precious metal catalyst, Co-Ni/AC, for the CO selective oxidation, was studied. Ni/AC, CO/AC, and Co-Ni/AC (with a Co/Ni atomic ratio of 1:1) catalysts were prepared by the excess impregnation method. XRD and XPS analysis showed that in the Co-Ni/AC catalyst, Co<inf>3</inf>O<inf>4</inf> is an important catalytic species for the CO selective oxidation in excess hydrogen. The high dispersion of Co<inf>3</inf>O<inf>4</inf> on the surface of the CO-Ni/AC catalyst provided more active sites and higher catalytic activity. Thus, the catalytic performance of Co<inf>3</inf>O<inf>4</inf> could be improved by the addition of nickel in the CO-Ni/AC catalyst. The addition of nickel could improve the dispersion of Co<inf>3</inf>O<inf>4</inf> and decrease the electron cloud density of CO in the catalyst. CO-Ni/AC is a potential catalyst with a low cost and high activity for removing trace amounts of CO in excess hydrogen.",Activated carbon; Carbon monoxide; Cobalt; Excess hydrogen; Nickel; Selective oxidation; Supported catalyst,,Activated carbon;Carbon monoxide;Cobalt;Excess hydrogen;Nickel;Selective oxidation;Supported catalyst,"F. Qiu; Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China; email: upczguilin@163.com",,,,,,,18722067,,THHPD,,English,Chin. J. Catal.,Article,Scopus,,2-s2.0-33750588548,,China,163.com,,,"Zhou, G.; Jiang, Y.; Qiu, F."
"Wang, M., Huang, B., Jiang, N., Liu, T., Huang, J., Guan, L.",An Fe-N-C electrocatalyst with dense active sites synthesized by expeditious pyrolysis of a natural Fe-N4 macrocyclic complex,2022,Journal of Materials Chemistry A,44,,,,,,9,10.1039/d2ta03409c,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85141497081&doi=10.1039%2Fd2ta03409c&partnerID=40&md5=5d4f9543b15eb2f4560d5c0fac5cd1ba,"Fujian Institute of Research On the Structure of Matter Chinese Academy of Sciences, Fuzhou, Fujian, China; Fujian Normal University, Fuzhou, Fujian, China","Wang, Minghao, Fujian Institute of Research On the Structure of Matter Chinese Academy of Sciences, Fuzhou, Fujian, China, Fujian Normal University, Fuzhou, Fujian, China; Huang, Bing, Fujian Institute of Research On the Structure of Matter Chinese Academy of Sciences, Fuzhou, Fujian, China; Jiang, Nannan, Fujian Institute of Research On the Structure of Matter Chinese Academy of Sciences, Fuzhou, Fujian, China; Liu, Tao, Fujian Institute of Research On the Structure of Matter Chinese Academy of Sciences, Fuzhou, Fujian, China; Huang, Jianren, Fujian Institute of Research On the Structure of Matter Chinese Academy of Sciences, Fuzhou, Fujian, China; Guan, Lunhui, Fujian Institute of Research On the Structure of Matter Chinese Academy of Sciences, Fuzhou, Fujian, China, Fujian Normal University, Fuzhou, Fujian, China","Platinum group metal (PGM)-free ORR catalysts containing highly dispersed metal-nitrogen sites have been demonstrated as the most promising alternatives to Pt-based catalysts. However, it remains a tremendous challenge to synthesize efficient ORR catalysts with dense active sites expeditiously. Herein, a series of highly dispersive Fe-N-C catalysts derived from N-doped Ketjen Black (N-KJB) and hemin were synthesized by a simple rapid pyrolysis method within 1 min. Benefitting from the spatial confinement effect of N-KJB and high-coordination natural iron source, the highly dispersive Fe is higher than 3 wt% without Fe particle agglomeration. The optimized Fe-KJB-3-60A electrocatalyst exhibits a superior ORR activity with a half-wave potential of 0.90 V in 0.1 M KOH and 0.79 V in 0.1 M HClO<inf>4</inf>. When used as the cathode catalyst in Zn-air batteries and proton exchange membrane fuel cells, Fe-KJB-3-60A exhibits a maximum peak power density of 251 mW cm−2 and 348 mW cm−2, respectively. © 2022 The Royal Society of Chemistry.",,Catalyst activity; Dispersion (waves); Doping (additives); Iron compounds; Potassium hydroxide; Proton exchange membrane fuel cells (PEMFC); Pyrolysis; Active site; Dispersed metals; Ketjen black; Macrocyclic complex; Metal free; N-doped; Platinum group metals; Pt-based catalyst; Synthesised; ]+ catalyst; Electrocatalysts,Catalyst activity;Dispersion (waves);Doping (additives);Iron compounds;Potassium hydroxide;Proton exchange membrane fuel cells (PEMFC);Pyrolysis;Active site;Dispersed metals;Ketjen black;Macrocyclic complex;Metal free;N-doped;Platinum group metals;Pt-based catalyst;Synthesised;]+ catalyst;Electrocatalysts,"L. Guan; CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China; email: guanlh@fjirsm.ac.cn",,,,,,Royal Society of Chemistry,20507488,,JMCAE,,English,J. Mater. Chem. A,Article,Scopus,,2-s2.0-85141497081,,China,fjirsm.ac.cn,,,"Wang, M.; Huang, B.; Jiang, N.; Liu, T.; Huang, J.; Guan, L."
"Herring, A.M., Voth, G., Witten, T., Coughlin, B., Yan, Y., Liberatore, M., Knauss, D.",Anionic transport in organic media,2011,ACS National Meeting Book of Abstracts,,,,,,,0,,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84861015806&partnerID=40&md5=10bb9b585e620641e9f851da2957e7d7,"Colorado School of Mines, Golden, CO, United States; The University of Chicago, Chicago, IL, United States; University of Massachusetts Amherst, Amherst, MA, United States; University of California, Riverside, Riverside, CA, United States","Herring, Andrew M., Colorado School of Mines, Golden, CO, United States, The University of Chicago, Chicago, IL, United States, University of Massachusetts Amherst, Amherst, MA, United States, University of California, Riverside, Riverside, CA, United States; Voth, Gregory A., Colorado School of Mines, Golden, CO, United States, The University of Chicago, Chicago, IL, United States, University of Massachusetts Amherst, Amherst, MA, United States, University of California, Riverside, Riverside, CA, United States; Witten, Thomas A., Colorado School of Mines, Golden, CO, United States, The University of Chicago, Chicago, IL, United States, University of Massachusetts Amherst, Amherst, MA, United States, University of California, Riverside, Riverside, CA, United States; Coughlin, Edward Bryan, Colorado School of Mines, Golden, CO, United States, The University of Chicago, Chicago, IL, United States, University of Massachusetts Amherst, Amherst, MA, United States, University of California, Riverside, Riverside, CA, United States; Yan, Yushan, Colorado School of Mines, Golden, CO, United States, The University of Chicago, Chicago, IL, United States, University of Massachusetts Amherst, Amherst, MA, United States, University of California, Riverside, Riverside, CA, United States; Liberatore, Matthew W., Colorado School of Mines, Golden, CO, United States, The University of Chicago, Chicago, IL, United States, University of Massachusetts Amherst, Amherst, MA, United States, University of California, Riverside, Riverside, CA, United States; Knauss, Daniel M., Colorado School of Mines, Golden, CO, United States, The University of Chicago, Chicago, IL, United States, University of Massachusetts Amherst, Amherst, MA, United States, University of California, Riverside, Riverside, CA, United States","While there has been much interest in the proton exchange membrane (PEM) fuel cell, its wide spread use has been restricted by cost, durability, and fuel versatility issues. This is primarily because Pt is the catalyst of choice for a PEM fuel cell on both the anode and the cathode. Alkaline catalysis in fuel cells has been demonstrated with non-precious metal catalysts, and a variety of fuels beyond H <inf>2</inf> and methanol. Alkaline fuel cells (AFCs), based on aqueous solutions of KOH, have serious drawbacks associated with system complexity and carbonate formation. Anion exchange membrane (AEMs) fuel cells have a number of advantages over both PEM fuel cells and traditional AFCs; however, ionic conductivity in AEMs is significantly lower than PEMs and chemical stability of cations in hydroxide has been poor. In this presentation we will present our work towards preparing thin robust highly conductive anion exchange membranes.",,,,,,,242nd ACS National Meeting and Exposition,,,,00657727,084127438X; 9780841274082; 0841269556; 0841274088; 9780841269941; 9780841224414; 9780841274266; 9780841269859; 0841274266; 9780841274389,ACSRA,,English,ACS Natl. Meet. Book Abstr.,Conference paper,Scopus,,2-s2.0-84861015806,,United States,No email,,,"Herring, A.M.; Voth, G.; Witten, T.; Coughlin, B.; Yan, Y.; Liberatore, M.; Knauss, D."
"Zhang, J., Song, X., Li, P., Wang, S., Wu, Z., Liu, X.",An iron-based catalyst with multiple active components synergetically improved electrochemical performance for oxygen reduction reaction,2018,Catalysts,8,6,243,,,,6,10.3390/catal8060243,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85049263494&doi=10.3390%2Fcatal8060243&partnerID=40&md5=8144206c42aa82d51664f1d85d269ac4,"College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China; College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China; State Key Laboratory Base of Eco-chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China","Zhang, Jian, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China; Song, Xiaoming, College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China; Li, Ping, State Key Laboratory Base of Eco-chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China; Wang, Shuai, State Key Laboratory Base of Eco-chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China; Wu, Zexing, State Key Laboratory Base of Eco-chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China; Liu, Xi'en, State Key Laboratory Base of Eco-chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China","Lack of highly active and stable non-precious metal catalysts (NPMCs) as an alternative to Pt for oxygen reduction reaction (ORR) in the application of zinc-air batteries and proton-exchange membrane fuel cells (PEMFCs) significantly hinders the commercialization of these energy devices. Herein, we synthesize a new type of catalyst composed of nitrogen-coordinated and carbon-embedded metal (Fe-N/Fe<inf>3</inf>C/Fe/C) by pyrolyzing a precursor at 800◦C under argon atmosphere, and the precursor is obtained by heating a mixture of the tri (dipyrido [3,2-a:2′,3′-c] phenazinyl) phenylene and FeSO<inf>4</inf> at 160◦C in a Teflon-lined stainless autoclave. The resultant Fe-N/Fe<inf>3</inf>C/Fe/C-800 exhibits the highest activity for the ORR with onset and half-wave potentials of 1.00 and 0.82 V in 0.1 M KOH, respectively. Furthermore, it also shows a potential ORR activity in 0.1 M HClO<inf>4</inf>, which is promising for the application in commercial PEMFCs. Most importantly, Fe-N/Fe<inf>3</inf>C/Fe/C-800 exhibits a comparable electrochemical performance to Pt/C for the application in zinc-air battery. The specific capacity approaches 700 mAh·g−1, and the maximum power density is also comparable to that of Pt/C at the current density of 200 mA·cm−2. The work opens up a simple strategy to prepare ORR electrocatalyts for zinc-air battery and PEMFCs. © 2018 by the authors. Licensee MDPI, Basel, Switzerland.",Electrocatalysts; Iron nanoparticles; Iron-nitrogen coordination; Oxygen reduction reaction,,Electrocatalysts;Iron nanoparticles;Iron-nitrogen coordination;Oxygen reduction reaction,"S. Wang; State Key Laboratory Base of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao, 266042, China; email: qustwangshuai@qust.edu.cn",,,,,,MDPI,,,,,English,Catalysts,Article,Scopus,,2-s2.0-85049263494,,China,qust.edu.cn,,,"Zhang, J.; Song, X.; Li, P.; Wang, S.; Wu, Z.; Liu, X."
"Li, Y., Wang, X., Liu, J., Jin, Z., Liu, C.P., Ge, J.J., Xing, W.",Anode Catalytic Dependency Behavior on Ionomer Content in Direct CO Polymer Electrolyte Membrane Fuel Cell,2022,CHEMICAL RESEARCH IN CHINESE UNIVERSITIES,38,5,,1251,1257,7,2,10.1007/s40242-022-2193-8,,"[Li Yang; Wang Xian; Liu Jie; Jin Zhao; Liu Changpeng; Ge Junjie; Xing Wei] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Jilin Prov Key Lab Low Carbon Chem Power, Changchun 130022, Peoples R China; [Li Yang; Wang Xian; Liu Jie; Liu Changpeng; Ge Junjie; Xing Wei] Univ Sci & Technol China, Sch Appl Chem & Engn, Hefei 230026, Peoples R China",,"In this work, the effect of Nafion ionomer content on the structure and catalytic performance of direct CO polymer electrolyte membrane fuel cell(CO-PEMFC) by using Rh-N-C single-atom catalyst as the anode catalyst layers was studied. The ionic plaque and roughness of the anode catalyst layers increase with the increase of Nafion ionomer content. Furthermore, the contact angle measurement results show that the hydrophilicity of the anode catalyst layers also increases with the increase of Nafion ionomer content. However, when the Nafion ionomer content is too low, the binding between microporous layers, catalyst layers and membrane cannot meet the requirement for either electric conductivity or mass transfer. While Nafion ionomer content increased above 30%, the content of water in anode is difficult to control. Therefore, it was found that AN 30(30% Nafion ionomer content of anode) is the best level to effectively extend the three-phase boundary and improve CO-PEMFCs performance.",Anode catalyst; Carbon monoxide; Polymer electrolyte membrane fuel cell(PEMFC); Nafion ionomer content,PEMFC; PERFORMANCE; LAYER; CATHODE; IMPROVEMENT; DURABILITY; MANAGEMENT,Anode catalyst;Carbon monoxide;Polymer electrolyte membrane fuel cell(PEMFC);Nafion ionomer content;PEMFC;PERFORMANCE;LAYER;CATHODE;IMPROVEMENT;DURABILITY;MANAGEMENT,xwang@ciac.ac.cn; gejj@ciac.ac.cn; xingwei@ciac.ac.cn,,"CHAOYANG DIST, 4, HUIXINDONGJIE, FUSHENG BLDG, BEIJING 100029, PEOPLES R CHINA",,,,HIGHER EDUCATION PRESS,1005-9040,,,,English,CHEM RES CHINESE U,Article,WoS,Chemistry,WOS:000853476000001,2-s2.0-85138058165,China,ciac.ac.cn,Chinese Acad Sci;Univ Sci & Technol China,"Chinese Acad Sci, China;Univ Sci & Technol China, China",Li Yang; Wang Xian; Liu Jie; Jin Zhao; Liu Changpeng; Ge Junjie; Xing Wei
"Xia, Z., Xu, X., Zhang, X., Li, H., Wang, S., Sun, G.",Anodic engineering towards high-performance direct methanol fuel cells with non-precious-metal cathode catalysts,2020,Journal of Materials Chemistry A,8,3,,1113,1119,,33,10.1039/c9ta11440h,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85078699863&doi=10.1039%2Fc9ta11440h&partnerID=40&md5=41e3882e0fbe36dda6c9509060e967b5,"Division of Fuel Cell & Battery, Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China; University of Chinese Academy of Sciences, Beijing, China","Xia, Zhangxun, Division of Fuel Cell & Battery, Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China; Xu, Xinlong, Division of Fuel Cell & Battery, Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China, University of Chinese Academy of Sciences, Beijing, China; Zhang, Xiaoming, Division of Fuel Cell & Battery, Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China; Li, Huanqiao, Division of Fuel Cell & Battery, Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China; Wang, Suli, Division of Fuel Cell & Battery, Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China; Sun, Gongquan, Division of Fuel Cell & Battery, Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China","Direct methanol fuel cells (DMFCs) have drawn extensive interest for the past two decades both in scientific research and industrial engineering circles for their advantages of high energy density, environmental friendliness, and easy fuel handling. However, their excessively high costs, especially derived from the massive use of precious metal catalysts in both their anodes and cathodes, hamper the commercialization of this technology to the general public. Though the production of inexpensive catalysts of methanol oxidation remains challenging, non-precious-metal-based catalysts of the oxygen reduction reaction have seen considerable technical progress, yielding remarkable performance levels in hydrogen-fueled polymer electrolyte membrane fuel cells (PEMFCs). Due to the particularities of the electrochemical reactions and mass transport for methanol fuel in DMFC electrodes, highly active non-precious metal catalysts have not yielded sufficiently satisfactory single-cell performances for practical applications. In the current work, rather than exploring the cathodic designs with advanced electrode materials and structures, we estimated the mass transport of methanol and its effects on cathode performance, and then redesigned the anode architecture with ultrathin gas diffusion layers based on carbon nanotube composite materials. By using such an alternative strategy focused on anodic engineering to accelerate methanol transport combined with the use of a methanol-inert cathode, an ultrahigh cell performance, comparable to those of Pt-C-containing cathodes, was achieved even at a low methanol concentration. The peak power density obtained was 141 mW cm-2, a value among the highest obtained from DMFCs with non-precious-metal catalyst cathodes to the best of our knowledge. A wider avenue of DMFC technologies for practical applications might be opened with further development of this work. © 2019 The Royal Society of Chemistry.",,Anodes; Carbon nanotubes; Catalysts; Cathodes; Cell engineering; Diffusion in gases; Electrochemical electrodes; Electrolytic reduction; Gas fuel purification; Industrial research; Methanol; Methanol fuels; Polyelectrolytes; Precious metals; Proton exchange membrane fuel cells (PEMFC); Carbon-nanotube composites; Direct methanol fuel cells (DMFCs); Electrochemical reactions; Environmental friendliness; Non-precious metal catalysts; Oxygen reduction reaction; Polymer electrolyte membrane fuel cell (PEMFCs); Precious metal catalysts; Direct methanol fuel cells (DMFC),Anodes;Carbon nanotubes;Catalysts;Cathodes;Cell engineering;Diffusion in gases;Electrochemical electrodes;Electrolytic reduction;Gas fuel purification;Industrial research;Methanol;Methanol fuels;Polyelectrolytes;Precious metals;Proton exchange membrane fuel cells (PEMFC);Carbon-nanotube composites;Direct methanol fuel cells (DMFCs);Electrochemical reactions;Environmental friendliness;Non-precious metal catalysts;Oxygen reduction reaction;Polymer electrolyte membrane fuel cell (PEMFCs);Precious metal catalysts;Direct methanol fuel cells (DMFC),,,,,,,Royal Society of Chemistry,20507488,,JMCAE,,English,J. Mater. Chem. A,Article,Scopus,,2-s2.0-85078699863,,China,No email,,,"Xia, Z.; Xu, X.; Zhang, X.; Li, H.; Wang, S.; Sun, G."
"Zhu, H., Sun, Z., Chen, N., Cao, H., Chen, M., Li, K., Cai, Y., Wang, F.",A Non-Precious-Metal Catalyst Derived from a Cp2-Co+-PBI Composite for Cathodic Oxygen Reduction under Both Acidic and Alkaline Conditions,2017,ChemElectroChem,4,5,,1117,1123,,8,10.1002/celc.201600762,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85013962671&doi=10.1002%2Fcelc.201600762&partnerID=40&md5=02915dc636559c5c3d3411e9a53b6e73,"Department of Organic Chemistry, Beijing University of Chemical Technology, Beijing, China","Zhu, Hong, Department of Organic Chemistry, Beijing University of Chemical Technology, Beijing, China; Sun, Zhaonan, Department of Organic Chemistry, Beijing University of Chemical Technology, Beijing, China; Chen, Nanjun, Department of Organic Chemistry, Beijing University of Chemical Technology, Beijing, China; Cao, Hehuan, Department of Organic Chemistry, Beijing University of Chemical Technology, Beijing, China; Chen, Minglin, Department of Organic Chemistry, Beijing University of Chemical Technology, Beijing, China; Li, Ke, Department of Organic Chemistry, Beijing University of Chemical Technology, Beijing, China; Cai, Yezheng, Department of Organic Chemistry, Beijing University of Chemical Technology, Beijing, China; Wang, Fanghui, Department of Organic Chemistry, Beijing University of Chemical Technology, Beijing, China","One major limitation for polymer electrolyte membrane fuel cells is the sluggish cathode kinetics. Development of efficient noble-free catalysts is the key resolution to the problem of the oxygen reduction reaction (ORR) in both acid and alkaline solutions. Herein, we report a new type of efficient non-precious-metal catalyst for the ORR through the direct pyrolysis of poly[2,2′-(1,1′-cobaltocenium)-5,5′-dibenzimidazole]. The cobalt oxides were produced after pyrolysis at 900 °C (Cp<inf>2</inf>-Co+-PBI-900, where PBI is polybenzimidazole). The obtained catalysts exhibit higher electrocatalytic activity and stability for the ORR under both alkaline and acidic conditions. Structural characterization manifested that Cp<inf>2</inf>-Co+-PBI-800 had the highest graphitic N content and Cp<inf>2</inf>-Co+-PBI-900 was also produced. In alkaline media, Cp<inf>2</inf>-Co+-PBI-900 showed the highest ORR activity with onset potential of 998 mV (vs. RHE), which was only 22 mV higher than that of Pt/C under identical conditions. Besides, in acidic media, Cp<inf>2</inf>-Co+-PBI-800 exhibited excellent ORR activity with an onset potential of 847 mV (vs. RHE) after leaching in 6 M HCl solution for 12 h. Both optimal catalysts displayed high durability, especially in acidic media. The half-wave potential was also improved by 11 mV after 5000 CV scanning cycles in N<inf>2</inf>. The catalysts possessed diverse active sites in different working conditions. In acid conditions, cobalt acted as the promotor, whereas, in alkaline conditions, CoO was the activity site. Moreover, graphite N and pyridine N were the main activity sites in acid and alkaline conditions, respectively. PBI has a long-chain and π-conjugated system, indicating that the PBI precursor can be used as a non-precious-metal catalyst. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim","1,1′-cobaltocenium-5,5′-bibenzimidazole; catalysis; fuel cells; non-precious metals; oxygen reduction reaction",Catalysis; Catalysts; Cobalt; Cobalt compounds; Electrolytes; Electrolytic reduction; Fuel cells; Metals; Organic polymers; Oxygen; Polyelectrolytes; Precious metals; Proton exchange membrane fuel cells (PEMFC); Pyrolysis; Cathodic oxygen reduction; Cobaltocenium; Electrocatalytic activity and stability; Non-precious metal catalysts; Non-precious metals; Oxygen reduction reaction; Pi-conjugated system; Structural characterization; Catalyst activity,"1,1′-cobaltocenium-5,5′-bibenzimidazole;catalysis;fuel cells;non-precious metals;oxygen reduction reaction;Catalysts;Cobalt;Cobalt compounds;Electrolytes;Electrolytic reduction;Metals;Organic polymers;Oxygen;Polyelectrolytes;Precious metals;Proton exchange membrane fuel cells (PEMFC);Pyrolysis;Cathodic oxygen reduction;Cobaltocenium;Electrocatalytic activity and stability;Non-precious metal catalysts;Pi-conjugated system;Structural characterization;Catalyst activity","H. Zhu; State Key Laboratory of Chemical Resource Engineering, Institute of Modern Catalysis, Department of Organic Chemistry, School of Science, Beijing University of Chemical Technology, Beijing, 100029, China; email: zhuho128@126.com",,,,,,Wiley-VCH Verlag info@degruyter.com,,,,,English,ChemElectroChem,Article,Scopus,,2-s2.0-85013962671,,China,126.com,,,"Zhu, H.; Sun, Z.; Chen, N.; Cao, H.; Chen, M.; Li, K.; Cai, Y.; Wang, F."
"Anson, C., Gerken, J., Preger, Y., Biswas, S., Root, T., Stahl, S.",A novel approach towards PGM-free PEM fuel cell cathodes,2018,,2,,,109,112,,0,,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85050885259&partnerID=40&md5=48cf2440205d936c83aaa35bd64f802a,"University of Wisconsin-Madison, Madison, WI, United States","Anson, Colin W., University of Wisconsin-Madison, Madison, WI, United States; Gerken, James B., University of Wisconsin-Madison, Madison, WI, United States; Preger, Yuliya, University of Wisconsin-Madison, Madison, WI, United States; Biswas, Sourav, University of Wisconsin-Madison, Madison, WI, United States; Root, Thatcher W., University of Wisconsin-Madison, Madison, WI, United States; Stahl, Shannon S., University of Wisconsin-Madison, Madison, WI, United States","One of the major obstacles preventing widespread implementation of PEM fuel cells is the requirement for prohibitive loadings of Pt at the cathode to achieve high activity for the oxygen reduction reaction. To address this concern, we are developing a novel PEM fuel cell, where the oxygen reduction reaction is spatially separated from the electrode. In our chemically regenerable redox cathode, a soluble organic redox mediator undergoes facile reduction at the cathode and transports electrons and protons through solution to a non-PGM catalyst, where the aerobic oxidation of the mediator (and therefore, reduction of O2) occurs. The oxidized mediator can then return to the electrode, where it is again reduced. The use of non-PGM catalysts in our system does not have the same drawbacks as in conventional PEM fuel cells, and the high performance possible with this approach could lead to an activity- and cost-competitive design relative to conventional PEMFCs.",Flow cathode; Hydrogen; Mediated fuel cells; Non-PGM,Catalysts; Cathodes; Electrolytic reduction; Gas fuel purification; Hydrogen; Oxygen; Aerobic oxidations; Cost competitive; Facile reduction; Non-PGM; Non-PGM catalysts; Organic redoxes; Oxygen reduction reaction; PEM fuel cell cathodes; Proton exchange membrane fuel cells (PEMFC),Flow cathode;Hydrogen;Mediated fuel cells;Non-PGM;Catalysts;Cathodes;Electrolytic reduction;Gas fuel purification;Oxygen;Aerobic oxidations;Cost competitive;Facile reduction;Non-PGM catalysts;Organic redoxes;Oxygen reduction reaction;PEM fuel cell cathodes;Proton exchange membrane fuel cells (PEMFC),,"Romanowicz, B.; Case, F.; Case, F.; Laudon, M.",,"11th Annual TechConnect World Innovation Conference and Expo, Held Jointly with the 20th Annual Nanotech Conference and Expo,the 2018 SBIR/STTR Spring Innovation Conference, and the Defense TechConnect DTC Spring Conference",Anaheim,2018-05-13 through 2018-05-16,TechConnect,,9780998878225; 9780998878232,,,English,TechConnect Briefs - Adv. Mater.,Conference paper,Scopus,,2-s2.0-85050885259,,United States,No email,,,"Anson, C.; Gerken, J.; Preger, Y.; Biswas, S.; Root, T.; Stahl, S."
"Mashkani, F.A., Gharibi, H., Amani, M., Zhiani, M., Morsali, A.",A novel electrocatalyst based on Fe-ZIF-PPY nanocomposite for oxygen reduction reaction in air-breathing direct-ethanol fuel cell,2022,Applied Surface Science,584,,152529,,,,26,10.1016/j.apsusc.2022.152529,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85123775693&doi=10.1016%2Fj.apsusc.2022.152529&partnerID=40&md5=45d8551caebfb3e4402fdda64541d8df,"Department of Chemistry, Tarbiat Modares University, Tehran, Tehran, Iran; Department of Chemical Engineering, Islamic Azad University, Tehran, Tehran, Iran","Mashkani, Fatemeh Arshadi, Department of Chemistry, Tarbiat Modares University, Tehran, Tehran, Iran; Gharibi, Hussein, Department of Chemistry, Tarbiat Modares University, Tehran, Tehran, Iran; Amani, Mitra, Department of Chemical Engineering, Islamic Azad University, Tehran, Tehran, Iran; Zhiani, Mohammad, Department of Chemistry, Tarbiat Modares University, Tehran, Tehran, Iran; Morsali, Ali, Department of Chemistry, Tarbiat Modares University, Tehran, Tehran, Iran","The development of alcohol tolerance electrocatalysts to reduce expensive electrocatalysts has been the prospect of widespread use of alcoholic fuel cells. Therefore, the production of favorable electrocatalysts with the optimized percentage of metals and heteroatoms, enables control of electrocatalytic properties to enhance activity in the alkaline medium. In this work, Fe-ZIF-polypyrrole composite (Fe-ZIF-PPY) was carbonized under argon atmosphere, and finally, S,N-codoped carbon nanotubes containing iron nanoparticles nanocomposite (Fe-NC/S,N-CNT) was obtained. The electrocatalytic property, structure, and morphology of Fe-NC/S,N-CNT were explored via various characterization techniques (Fe-SEM, TEM, HRTEM, TGA, Raman, XRD, BET, XPS, ICP, element mapping and EDAX). Applicability of the S-doped Fe-N-C catalyst in alkaline media shows high ORR activity with sharp half-wave potential at 0.93 V (vs. RHE) and the Tafel slope of 53 mV/dec. Also, in an anion-exchange membrane direct ethanol fuel cell (AEM-DEFC) under the same conditions, two cathodes are made with the optimized electrocatalyst as MEA-1 and commercial 10 wt% Pt/C as MEA-2. The power density of 20 and 9 mW cm−2 were obtained at 0.6 V in an air-breathing, respectively. The performance of Fe-NC/S,N-CNT catalyst was assessed optimum in DEFC. In examining the effective factors to boost the activity of the catalyst, the prominent roles of specific surface area (SSA), porosity, conductivity, and high density of active sites can be note. © 2022 Elsevier B.V.",Anion-exchange membrane; Cathode catalysts; Direct ethanol fuel cell; Metal-organic frameworks,Alkaline fuel cells; Carbon dioxide; Carbon nanotubes; Catalyst activity; Catalyst selectivity; Cathodes; Electrocatalysts; Electrolysis; Electrolytic reduction; Ethanol; Ethanol fuels; Ion exchange membranes; Iron compounds; More electric aircraft; Morphology; Nanocatalysts; Nanocomposites; Organometallics; Oxygen; Polypyrroles; Proton exchange membrane fuel cells (PEMFC); Air breathing; Alkaline media; Argon atmospheres; Cathode catalyst; Electrocatalytic properties; Heteroatoms; Metalorganic frameworks (MOFs); Oxygen reduction reaction; Polypyrrole composites; ]+ catalyst; Direct ethanol fuel cells (DEFC),Anion-exchange membrane;Cathode catalysts;Direct ethanol fuel cell;Metal-organic frameworks;Alkaline fuel cells;Carbon dioxide;Carbon nanotubes;Catalyst activity;Catalyst selectivity;Cathodes;Electrocatalysts;Electrolysis;Electrolytic reduction;Ethanol;Ethanol fuels;Ion exchange membranes;Iron compounds;More electric aircraft;Morphology;Nanocatalysts;Nanocomposites;Organometallics;Oxygen;Polypyrroles;Proton exchange membrane fuel cells (PEMFC);Air breathing;Alkaline media;Argon atmospheres;Cathode catalyst;Electrocatalytic properties;Heteroatoms;Metalorganic frameworks (MOFs);Oxygen reduction reaction;Polypyrrole composites;]+ catalyst;Direct ethanol fuel cells (DEFC),"H. Gharibi; Department of Chemistry, Faculty of Basic Science, Tarbiat Modares University, Tehran, Iran; email: gharibi@modares.ac.ir",,,,,,Elsevier B.V.,01694332,0873392558,ASUSE,,English,Appl Surf Sci,Article,Scopus,,2-s2.0-85123775693,,Iran,modares.ac.ir,,,"Mashkani, F.A.; Gharibi, H.; Amani, M.; Zhiani, M.; Morsali, A."
"Gao, W., Lei, Y., Zhang, X., Hu, X., Song, P., Zhao, Q., Wang, C., Mao, Z.",An overview of proton exchange membrane fuel cell; 质子交换膜燃料电池研究进展,2022,Huagong Jinzhan/Chemical Industry and Engineering Progress,41,3,,1539,1555,,27,10.16085/j.issn.1000-6613.2021-2003,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85127038211&doi=10.16085%2Fj.issn.1000-6613.2021-2003&partnerID=40&md5=a2d66bb1f92fd1c24cbfd3af3ae72b75,"Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China","Gao, Weitao, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China; Lei, Yijie, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China; Zhang, Xun, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China; Hu, Xiaobo, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China; Song, Pingping, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China; Zhao, Qing, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China; Wang, Cheng, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China; Mao, Zongqiang, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China","Proton exchange membrane fuel cell (PEMFC) has been considered as one of the most promising next-generation power sources for clean automobiles because of their advantages in efficiency, power density, environmental friendliness, low temperature start ability, etc.. However, the gap between the durability and cost of PEMFC and those of commercialization requirements is still large. To overcome the above-mentioned two major problems, joint efforts and progress of the entire fuel cell process chain are required. In this paper, the recent research progress of the entire PEMFC process chain, from catalysts, membrane electrode assemblies (MEA), fuel cell stacks to fuel cell engines, are analyzed and classified reviewed, and research hotspots such as single-atom catalysts, non-noble metal catalysts, special morphology catalysts, ordered catalyst layers, high-temperature proton exchange membranes, MEA interlayer interface optimization, integrated porous bipolar plates, hydrogen circulation, are introduced. This paper points out that low/non-platinum catalyst layers, ultra-thin proton exchange membranes, gradient/ordered MEA, high-temperature operation and self-humidification of fuel cells are the future development trends, of which further innovation and breakthrough are urgently needed. © 2022, Chemical Industry Press Co., Ltd. All right reserved.",Catalyst; Fuel cell engine; Fuel cell stack; Fuel cells; Membrane electrode assemblies; Membranes,Electrodes; High temperature operations; Membranes; More electric aircraft; Precious metals; Proton exchange membrane fuel cells (PEMFC); Temperature; Cell process; Environmental friendliness; Fuel cell engine; Fuel cell stack; Membrane electrode assemblies; Power densities; Power sources; Process chain; Proton-exchange membranes fuel cells; ]+ catalyst; Catalysts,Catalyst;Fuel cell engine;Fuel cell stack;Fuel cells;Membrane electrode assemblies;Membranes;Electrodes;High temperature operations;More electric aircraft;Precious metals;Proton exchange membrane fuel cells (PEMFC);Temperature;Cell process;Environmental friendliness;Power densities;Power sources;Process chain;Proton-exchange membranes fuel cells;]+ catalyst;Catalysts,"C. Wang; Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China; email: wangcheng@tsinghua.edu.cn",,,,,,Materials China,10006613,,,,Chinese,Huagong Jinzhan/Chem. Ind. Eng. Prog.,Article,Scopus,,2-s2.0-85127038211,,China,tsinghua.edu.cn,,,"Gao, W.; Lei, Y.; Zhang, X.; Hu, X.; Song, P.; Zhao, Q.; Wang, C.; Mao, Z."
"Sun, M., Gong, S., Zhang, Y.X., Niu, Z.",A perspective on the PGM-free metal–nitrogen–carbon catalysts for PEMFC,2022,Journal of Energy Chemistry,67,,,250,254,,25,10.1016/j.jechem.2021.10.014,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85119172508&doi=10.1016%2Fj.jechem.2021.10.014&partnerID=40&md5=9526ddf046753aa1b6bc0fb5ab5074a3,"Department of Chemical Engineering, Tsinghua University, Beijing, China","Sun, Mingze, Department of Chemical Engineering, Tsinghua University, Beijing, China; Gong, Shuyan, Department of Chemical Engineering, Tsinghua University, Beijing, China; Zhang, Yuxiao, Department of Chemical Engineering, Tsinghua University, Beijing, China; Niu, Zhiqiang, Department of Chemical Engineering, Tsinghua University, Beijing, China",[No abstract available],Fuel cells; Oxygen reduction reaction; PGM-free catalysts; Power density; Stability,,Fuel cells;Oxygen reduction reaction;PGM-free catalysts;Power density;Stability,"Z. Niu; Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China; email: niuzq@tsinghua.edu.cn",,,,,,Elsevier B.V.,20954956,,,,English,J. Energy Chem.,Article,Scopus,,2-s2.0-85119172508,,China,tsinghua.edu.cn,,,"Sun, M.; Gong, S.; Zhang, Y.-X.; Niu, Z."
"Wang, W., Cheng, X.Y., Li, H.G., Li, M.L., Chen, L., Yang, J., Jiang, Y.X., Huang, R., Sun, S.G.",A Phosphorus-Bridged Spin Trigger for Oxygen Reduction,2025,ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,,,,,,11,0,10.1002/anie.202522880,,"[Wang, Wu; Cheng, Xiaoyang; Li, Min-Le; Chen, Long; Jiang, Yan-Xia; Huang, Rui; Sun, Shi-Gang] Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China; [Yang, Jian] Chongqing Univ, Inst Adv Interdisciplinary Studies, Coll Chem & Chem Engn, Ctr Adv Electrochem Energy, Chongqing 400044, Peoples R China; [Li, Hong-Guan] Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China",,"Precise control over the spin degree of freedom of catalytic metal centers represents a significant challenge in enhancing the oxygen reduction reaction (ORR). In this work, we report a phosphorus(P)-bridged composite comprising Fe single atoms (SAs) and atomic clusters (ACs), FeSA/AC/PNC, wherein the FeSA-P-FeAC structure functions as an efficient electron channel and, more importantly, a spin trigger. This trigger induces a spin-state transition of FeII from low-spin (S = 0) to medium-spin (S = 1), as unequivocally deciphered by advanced spectroscopic and magnetic analyses. This spin-state reconstruction directly optimizes the reaction pathway by enhancing O2 adsorption and facilitating *OH desorption. The resulting catalyst exhibits exceptional oxygen reduction activity in both acidic and neutral media, with half-wave potentials of 0.852 and 0.831 V, respectively, and achieves a peak power density of 1.35 W cm-2 in proton exchange membrane fuel cells (PEMFCs). This strategy is universally effective for Co and Ni systems, establishing spin-state engineering as a general principle for designing high-performance non-precious metal catalysts.",Oxygen reduction reaction; Phosphorus-bridged; Proton exchange membrane fuel cells; Single-atom and cluster composites; Spin trigger,CATALYSTS; IDENTIFICATION; PERFORMANCE; DURABILITY; CARBON,Oxygen reduction reaction;Phosphorus-bridged;Proton exchange membrane fuel cells;Single-atom and cluster composites;Spin trigger;CATALYSTS;IDENTIFICATION;PERFORMANCE;DURABILITY;CARBON,xycheng@xmu.edu.cn; yjh@cqu.edu.cn; yxjiang@xmu.edu.cn; rhuang@xmu.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1433-7851,,,41400165,English,ANGEW CHEM INT EDIT,Article; Early Access,WoS,Chemistry,WOS:001639424200001,2-s2.0-105024958592,China,xmu.edu.cn,Xiamen Univ;Chongqing Univ;Northeastern Univ,"Xiamen Univ, China;Chongqing Univ, China;Northeastern Univ, China","Wang, Wu; Cheng, Xiaoyang; Li, Hong-Guan; Li, Min-Le; Chen, Long; Yang, Jian; Jiang, Yan-Xia; Huang, Rui; Sun, Shi-Gang"
"Li, Y.R., Qiao, L.Q., Yin, S.H., Cheng, X.Y., Wang, C.T., Jiang, Y.X., Sun, S.G.",A plasma-assisted approach to enhance density of accessible FeN4 sites for proton exchange membrane fuel cells,2023,JOURNAL OF COLLOID AND INTERFACE SCIENCE,647,,,224,232,9,10,10.1016/j.jcis.2023.05.107,,"[Li, Yanrong; Qiao, Liqing; Yin, Shuhu; Cheng, Xiaoyang; Jiang, Yanxia; Sun, Shigang] Xiamen Univ, Coll Chem & Chem Engn, Engn Res Ctr Electrochem Technol, Minist Educ,State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China; [Li, Yanrong; Qiao, Liqing; Yin, Shuhu; Cheng, Xiaoyang; Jiang, Yanxia; Sun, Shigang] Xiamen Univ, Discipline Intelligent Instrument & Equipment, Xiamen 361005, Peoples R China; [Wang, Chong-Tai] Hainan Normal Univ, Coll Chem & Chem Engn, Key Lab Electrochem Energy Storage & Energy Conver, Haikou 571158, Peoples R China",,"Enhancing the density and utilization of FeN4 sites can serve as a viable approach to enhance the catalytic efficacy of iron nitrogen carbon (Fe-N-C) catalysts for oxygen reduction reaction (ORR). Herein, we present a plasma-assisted method for enhancing the porosity of nitrogen-doped carbon. Our findings indicate that the ideal ratio of mesopore to micropore area is 0.463. This ratio not only promotes the diffusion of Fe3+ but also creates additional active sites for Fe3+ loading, leading to an increase in the number of available FeN4 sites in Fe-N-C electrocatalysts during pyrolysis. The density (76.5 & mu;mol g-1) and utilization (21.08 %) of D-FeNC-30 are significantly higher than those of FeNC without plasma treatment, with a 2.8-fold and 2-fold increase, respectively. Remarkably, it displays outstanding performance, evidenced by a half-wave potential of 0.835 V (vs. RHE) in a 0.1 M HClO4 solution and a power density of 0.860 W cm � 2 in proton exchange membrane fuel cells (PEMFCs). The developed plasma-assisted approach for improving the site density (SD) and utilization of FeN4 provides a new perspective for high-performance ORR Fe-N-C catalysts.",Plasma; Fe-N-C; Site density; Defects; Oxygen reduction reaction; Fuel cells,ACTIVE-SITES; CATHODE CATALYSTS; OXYGEN; REDUCTION; HYDROGEN; IRON; ELECTROCATALYSTS; CHALLENGES; GRAPHENE,Plasma;Fe-N-C;Site density;Defects;Oxygen reduction reaction;Fuel cells;ACTIVE-SITES;CATHODE CATALYSTS;OXYGEN;REDUCTION;HYDROGEN;IRON;ELECTROCATALYSTS;CHALLENGES;GRAPHENE,yxjiang@xmu.edu.cn; sgsun@xmu.edu.cn,,"525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA",,,,ACADEMIC PRESS INC ELSEVIER SCIENCE,0021-9797,,,37247485,English,J COLLOID INTERF SCI,Article,WoS,Chemistry,WOS:001011659500001,2-s2.0-85160543949,China,xmu.edu.cn,Xiamen Univ;Hainan Normal Univ,"Xiamen Univ, China;Hainan Normal Univ, China","Li, Yanrong; Qiao, Liqing; Yin, Shuhu; Cheng, Xiaoyang; Wang, Chong-Tai; Jiang, Yanxia; Sun, Shigang"
"Zhou, Z.F., Huang, C.D., Tian, Q.Y.",Application of single-atom catalyst in proton exchange membrane fuel cell; 单原子催化剂在质子交换膜燃料电池中的应用,2019,Xiandai Huagong/Modern Chemical Industry,39,7,,48,51,,0,10.16606/j.cnki.issn0253-4320.2019.07.010,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85072165204&doi=10.16606%2Fj.cnki.issn0253-4320.2019.07.010&partnerID=40&md5=3264c6447a1a6f73f689c5988eb2ce72,"School of Chemical Engineering and Technology, Tianjin University, Tianjin, China","Zhou, Zhaofei, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China; Huang, Chengde, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China; Tian, Qingyi, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China","In the research of proton exchange membrane fuel cells (PEMFC), the catalysts with high catalytic activity, low cost and high stability become the research hotspots. Single-atom catalysts can have a higher catalytic performance due to their high metal utilization. This paper reviews some common preparation methods of single-atom catalysts in recent years and the problems that need to be solved to improve the activity of catalysts in the preparation process, as well as the current research classification of single-atom catalysts. It also introduces the application of single-atom catalysts in PEMFC, including electroreduction of oxygen and electrooxidation of small organic molecules as well as some prospects for single-atom catalysts. © 2019, China National Chemical Information Center. All right reserved.",Catalysts; Electrooxidation; Electroreduction; Fuel cell; Single-atom,,Catalysts;Electrooxidation;Electroreduction;Fuel cell;Single-atom,"C.-D. Huang; School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300300, China; email: cdhuang@tju.edu.cn",,,,,,China National Chemical Information Center,02534320,,HTKUD,,Chinese,Huagong Xiandai,Review,Scopus,,2-s2.0-85072165204,,China,tju.edu.cn,,,"Zhou, Z.-F.; Huang, C.-D.; Tian, Q.-Y."
"Zhang, Q.Q., Guan, J.Q.",Applications of Atomically Dispersed Oxygen Reduction Catalysts in Fuel Cells and Zinc-Air Batteries,2021,ENERGY & ENVIRONMENTAL MATERIALS,4,3,,307,335,29,96,10.1002/eem2.12128,,"[Zhang, Qiaoqiao; Guan, Jingqi] Jilin Univ, Coll Chem, Key Lab Surface & Interface Chem Jilin Prov, Changchun 130021, Peoples R China",,"Due to severe energy crisis and environmental problems, green and renewable electrochemical energy devices such as fuel cells and metal-air batteries have attracted great attention, where oxygen reduction reaction (ORR) plays a vital role. The rational design of efficient and robust single-atom catalysts (SACs) is vital but challenging toward ORR. Here, recent developments of single-atom ORR catalysts in fuel cells and Zn-air batteries are systematically summarized, focusing on transition-metal-based electrocatalysts including single or dual Fe, Co, Ni, Cu, Zn, Pd, Ag, and Pt sites. At the atomic level, different synthesis methods and characterization techniques are introduced. Theoretical studies of ORR mechanisms are documented. The active sites and structure-property relationships of SACs for ORR are highlighted, and the performances of proton exchange membrane fuel cells (PEMFCs), anion exchange membrane fuel cells (AEMFCs), and Zn-air batteries are discussed. The great challenges and future directions of SACs in fuel cells and Zn-air batteries are presented.",fuel cells; oxygen reduction; single&#8208; atom catalysts; theoretical calculations; zinc&#8211; air batteries,FE-N-C; SINGLE-ATOM CATALYSTS; FUNCTIONALIZED GRAPHITIC MATERIALS; ACTIVE-SITES; DOPED CARBON; IN-SITU; PLATINUM NANOPARTICLES; METAL-FREE; NANOPOROUS GRAPHENE; POROUS CARBONS,fuel cells;oxygen reduction;single&#8208;atom catalysts;theoretical calculations;zinc&#8211;air batteries;FE-N-C;SINGLE-ATOM CATALYSTS;FUNCTIONALIZED GRAPHITIC MATERIALS;ACTIVE-SITES;DOPED CARBON;IN-SITU;PLATINUM NANOPARTICLES;METAL-FREE;NANOPOROUS GRAPHENE;POROUS CARBONS,guanjq@jlu.edu.cn,,"111 RIVER ST, HOBOKEN 07030-5774, NJ USA",,,,WILEY,,,,,English,ENERGY ENVIRON MATER,Review,WoS,Materials Science,WOS:000586263700001,2-s2.0-85112691115,China,jlu.edu.cn,Jilin Univ,"Jilin Univ, China","Zhang, Qiaoqiao; Guan, Jingqi"
"Chi, B., Zhang, X.R., Liu, M.R., Jiang, S.J., Liao, S.J.","Applications of M/N/C analogue catalysts in PEM fuel cells and metal-air/oxygen batteries: Status quo, challenges and perspectives",2020,PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL,30,6,,807,814,8,25,10.1016/j.pnsc.2020.10.014,,"[Chi, Bin; Zhang, Xiaorong; Liu, Mingrui; Jiang, Shijie; Liao, Shijun] South China Univ Technol, Sch Chem & Chem Engn, Key Lab Fuel Cell Technol Guangdong Prov, Guangzhou 510641, Peoples R China; [Chi, Bin; Zhang, Xiaorong; Liu, Mingrui; Jiang, Shijie; Liao, Shijun] South China Univ Technol, Sch Chem & Chem Engn, Key Lab New Energy Technol Guangdong Univ, Guangzhou 510641, Peoples R China",,"To meet the sharp increase in demand for clean and renewable energy, it is necessary to develop new energy-conversion and storage technologies, such as proton exchange membrane fuel cells (PEMFCs) and metal-air/oxygen batteries (MABs). Due to the sluggish reaction kinetics of the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) in the cathodes of PEMFCs and MABs, significant amounts of precious metal catalysts need to be used, driving up the cost of fuel cells and MABs and thereby hindering their commercialization on a large scale. Transition metal and nitrogen co-doped carbonaceous catalysts (M/N/C) have high catalytic activity towards the ORR and OER once the catalysts are modified with certain promoters/additives. In addition, M/N/C catalysts can be prepared from abundant, inexpensive materials, making their cost negligible compared with precious metal catalysts, a development that would efficiently decrease the cost of PEMFCs and MABs. In last decade, numerous researchers have attempted to realize these applications of M/N/C catalysts, and some exciting results have been achieved, making these promising replacements for precious metal catalysts. However, some serious problems and significant challenges remain. In this paper, we review the research on the application of M/N/C analogue catalysts in PEMFCs and MABs in the last 10 years, indicate the remaining challenges, and suggest the future research directions.",PEM fuel cell; MABs; M/N/C catalysts; Oxygen reaction,FE-N-C; OXYGEN REDUCTION REACTION; HIGH-PERFORMANCE; ACTIVE-SITES; N/C ELECTROCATALYSTS; CATHODE CATALYSTS; X SITES; FE/N/C; IRON; ORR,PEM fuel cell;MABs;M/N/C catalysts;Oxygen reaction;FE-N-C;OXYGEN REDUCTION REACTION;HIGH-PERFORMANCE;ACTIVE-SITES;N/C ELECTROCATALYSTS;CATHODE CATALYSTS;X SITES;FE/N/C;IRON;ORR,chsjliao@scut.edu.cn,,"STE 800, 230 PARK AVE, NEW YORK, NY 10169 USA",,,,ELSEVIER SCIENCE INC,1002-0071,,,,English,PROG NAT SCI-MATER,Review,WoS,Materials Science; Science & Technology - Other Topics,WOS:000606620800003,2-s2.0-85096603471,China,scut.edu.cn,South China Univ Technol,"South China Univ Technol, China","Chi, Bin; Zhang, Xiaorong; Liu, Mingrui; Jiang, Shijie; Liao, Shijun"
"Wang, Q.H., Zhang, J., Wang, X.D., Liu, Q.T., Liu, J.J., Zhuang, Z.B., Shui, J.L.",Applied Voltage-Activated Fe―N―C Catalysts for Pem Fuel Cells,2024,ADVANCED SUSTAINABLE SYSTEMS,8,6,,,,10,4,10.1002/adsu.202300573,,"[Wang, Qiheng; Zhang, Jin; Wang, Xingdong; Liu, Jingjun; Zhuang, Zhongbin] Beijing Univ Chem Technol, Coll Mat Sci & Engn, Coll Chem Engn, Beijing 100029, Peoples R China; [Liu, Qingtao; Shui, Jianglan] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China",,"The practical application of non-precious FeNC catalysts in proton exchange membrane fuel cells (PEMFCs) continues to remain one of the major challenges due to their relatively poor oxygen reduction reaction (ORR) performance in acid. In this work, a fast and facilely performance enhancement strategy is first proposed for various FeNC catalysts by supplying different direct-current voltages to achieve a rapid solid-state activation at room temperature. The voltage-activated state-of-the-art FeNC catalyst has demonstrated a peak power density of 1.1 W cm-2 for PEMFC and remarkably increased long-term durability for ORR. The substantially improved performance can be attributed to the formation of highly active ketone-decorated (edge-hosted) FeN4 sites and substantially boosts coupled proton-electron transfer (CPET) by improving the conductivity of the as-synthesized FeNC with an interpenetrating network structure. The interconnected micro-nodes within the interpenetrating network are the main active regions for the ORR, evidenced by an optimized structural model based on the above typical morphology. Therefore, this finding provides an innovative and facile idea for solving the activity and stability deficiency for promising FeNC for commercial PEMFC. A novel strategy for enhancing FeNC catalysts for PEMFCs is introduced, employing voltage-activation at room temperature , resulting in a power density of 1.1 W cm-2 and higher durability due to the formation of active ketone-decorated FeN4 sites and high conductivity interpenetrating network structure.image",active sites; FeNC catalysts; oxygen reduction reaction; proton exchange membrane fuel cell; voltage activation,,active sites;FeNC catalysts;oxygen reduction reaction;proton exchange membrane fuel cell;voltage activation,liujingjun@mail.buct.edu.cn; zhuangzb@mail.buct.edu.cn; shuijianglan@buaa.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,2366-7486,,,,English,ADV SUSTAIN SYST,Article,WoS,Science & Technology - Other Topics; Materials Science,WOS:001137128000001,,China,mail.buct.edu.cn,Beijing Univ Chem Technol;Beihang Univ,"Beijing Univ Chem Technol, China;Beihang Univ, China","Wang, Qiheng; Zhang, Jin; Wang, Xingdong; Liu, Qingtao; Liu, Jingjun; Zhuang, Zhongbin; Shui, Jianglan"
"Yousaf, A.B., Monnier, J.R., Weidner, J.W., Hassan, M.K., Zaidi, S.J., Kasak, P.",A precious-metal-free Fe-intercalated carbon nitride porous-network with enhanced activity for the oxygen reduction reaction and methanol-tolerant oxygen reduction reaction,2020,Sustainable Energy and Fuels,4,10,,5050,5060,,15,10.1039/d0se00671h,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85092118453&doi=10.1039%2Fd0se00671h&partnerID=40&md5=876864dacf69bce4ba2bbd21d8e595b0,"Center for Advanced Materials, Qatar University, Doha, Qatar; Molinaroli College of Engineering and Computing, Columbia, SC, United States","Yousaf, Ammar Bin, Center for Advanced Materials, Qatar University, Doha, Qatar; Monnier, John R., Molinaroli College of Engineering and Computing, Columbia, SC, United States; Weidner, John W., Molinaroli College of Engineering and Computing, Columbia, SC, United States; Hassan, Mohammad K., Center for Advanced Materials, Qatar University, Doha, Qatar; Zaidi, Syed Javaid, Center for Advanced Materials, Qatar University, Doha, Qatar; Kasák, Peter, Center for Advanced Materials, Qatar University, Doha, Qatar","The economical cost of the catalyst material has remained a challenging task in traditional fuel cells (FCs) and in direct methanol fuel cells (DMFCs). However, replacement of noble metals with precious metal-free materials as catalysts has raised issues regarding their performance. Among them, cathodic catalysts have unresolved issues regarding working conditions, where they must be resistant to the effect of fuel crossover from the anode to maintain stable electrochemical behavior. We have focused on multiple factors to address these challenges and contribute to the field of DMFC electrocatalysis and have successfully lowered the high cost of the usual Pt catalyst by developing a non-precious metal-based Fe-N-C material as the cathode catalyst. Organic polymers in combination with C and N-rich sources of organic acids constitute the highly active Fe-N-C precursor byin situintercalation of Fe, facilitated by pyrolysis. The C and N-rich additives help generate abundant Fe-N<inf>x</inf>and N-C active sites for enhanced oxygen reduction reaction (ORR) under acidic and alkaline conditions and show a negligible decrease in activity after 2000 scan cycles. Moreover, the active sites for ORR electrocatalysis showed excellent stability for methanol tolerance, thereby resulting in enhanced and durable performance for DMFCs as well as for PEMFC systems. © The Royal Society of Chemistry 2020.",,Additives; Carbon nitride; Catalysis; Catalysts; Electrocatalysis; Electrodes; Electrolytic reduction; Iron compounds; Methanol; Methanol fuels; Organic polymers; Oxygen; Oxygen reduction reaction; Precious metals; Proton exchange membrane fuel cells (PEMFC); Alkaline conditions; Catalyst material; Direct methanol fuel cells (DMFCs); Electrochemical behaviors; Methanol tolerance; Methanol tolerant; Non-precious metals; Traditional fuels; Direct methanol fuel cells (DMFC); catalyst; electrochemical method; fuel cell; iron; methanol; oxygen; performance assessment; porous medium; reduction,Additives;Carbon nitride;Catalysis;Catalysts;Electrocatalysis;Electrodes;Electrolytic reduction;Iron compounds;Methanol;Methanol fuels;Organic polymers;Oxygen;Oxygen reduction reaction;Precious metals;Proton exchange membrane fuel cells (PEMFC);Alkaline conditions;Catalyst material;Direct methanol fuel cells (DMFCs);Electrochemical behaviors;Methanol tolerance;Methanol tolerant;Non-precious metals;Traditional fuels;Direct methanol fuel cells (DMFC);catalyst;electrochemical method;fuel cell;iron;performance assessment;porous medium;reduction,,,,,,,Royal Society of Chemistry orders@rsc.org,,,,,English,Sustain. Energy Fuels,Article,Scopus,,2-s2.0-85092118453,,Qatar;United States,No email,,,"Yousaf, A.B.; Monnier, J.R.; Weidner, J.W.; Hassan, M.K.; Zaidi, S.J.; Kasak, P."
"Zhang, X., Truong-Phuoc, L., Asset, T., Pronkin, S., Pham-Huu, C.",Are Fe-N-C Electrocatalysts an Alternative to Pt-Based Electrocatalysts for the Next Generation of Proton Exchange Membrane Fuel Cells?,2022,ACS CATALYSIS,12,22,,13853,13875,23,66,10.1021/acscatal.2c02146,,"[Zhang, Xiong; Truong-Phuoc, Lai; Asset, Tristan; Pronkin, Sergey; Pham-Huu, Cuong] Univ Strasbourg, CNRS, UMR 7515, Inst Chem & Proc Energy Environm & Hlth ICPEES, F-67087 Strasbourg, France",,"Notable progress has been made for low Pt-based and Fe-N-C electrocatalysts for proton exchange membrane fuel cell (PEMFC) applications. In particular, the research and development of cost-effective Fe-N-C's have witnessed significant improvements in recent years due to the need for an alternative candidate for the scare and expensive platinum. Numerous studies have explored the design and optimization of Fe-N-C's and generally make simple performance comparisons with commercial Pt/C catalysts on the basis of rotating disk electrode (RDE) and/or membrane electrode assembly (MEA), thus arguing that said materials are comparable, or could even surpass, Pt/C electrocatalysts. The resulting question, i.e., ""Are Fe-N-C's an alternative to Pt-based electrocatalysts in PEMFCs?"", is the centerpiece of this review. Here, the interconnectedness and differences between Fe-N-C's and Pt-based materials are discussed from fundamental insights to applications in PEMFCs, covering the oxygen reduction reaction (ORR) mechanism, the nature of active sites and its effect on the intrinsic activity, the rational design of the catalyst layer, the electrocatalysts' performance in PEMFCs, and their durability in operating conditions. This review provides a global picture of the current state of research in the field of PEMFC electrocatalysts, focusing on the two most important types of cathode materials and aiming to shed light on the potential of Fe-N- C's as a replacement for Pt-based catalysts along with pointing out the research directions toward the next generation of PEMFCs.",Fe-N-C electrocatalysts; Pt-based electrocatalysts; oxygen reduction reaction; proton exchange membrane fuel cells; durability; catalytic layer,OXYGEN REDUCTION REACTION; POLYMER ELECTROLYTE MEMBRANE; NITROGEN-CARBON ELECTROCATALYSTS; DOPED MESOPOROUS CARBON; SINGLE-ATOM CATALYSTS; METAL-FREE CATALYSTS; IRON-BASED CATALYSTS; ACTIVE-SITES; TRANSITION-METAL; HIGH-PERFORMANCE,Fe-N-C electrocatalysts;Pt-based electrocatalysts;oxygen reduction reaction;proton exchange membrane fuel cells;durability;catalytic layer;POLYMER ELECTROLYTE MEMBRANE;NITROGEN-CARBON ELECTROCATALYSTS;DOPED MESOPOROUS CARBON;SINGLE-ATOM CATALYSTS;METAL-FREE CATALYSTS;IRON-BASED CATALYSTS;ACTIVE-SITES;TRANSITION-METAL;HIGH-PERFORMANCE,t.asset@unistra.fr; sergey.pronkin@unistra.fr; cuong.pham-huu@unistra.fr,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2155-5435,,,,English,ACS CATAL,Review,WoS,Chemistry,WOS:000878621800001,2-s2.0-85141475244,France,unistra.fr,Univ Strasbourg,"Univ Strasbourg, France","Zhang, Xiong; Truong-Phuoc, Lai; Asset, Tristan; Pronkin, Sergey; Pham-Huu, Cuong"
"Zhong, G., Wang, H., Yu, H., Peng, F.",A Review of Carbon-based Non-noble Catalysts for Oxygen Reduction Reaction,2017,Acta Chimica Sinica,75,10,,943,966,,27,10.6023/A17040183,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85037817238&doi=10.6023%2FA17040183&partnerID=40&md5=36355a429224552202ffb9e312f4ea3d,"School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, China; School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan, Guangdong, China","Zhong, Guoyu, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, China, School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan, Guangdong, China; Wang, Hongjuan, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, China; Yu, Hao, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, China; Peng, Feng, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, China","Proton exchange membrane fuel cells (PEMFCs) that directly convert chemical energy into electrical energy can be applied to portable power and fuel cell electric vehicles, due to their advantages such as environment-friendliness, high power density and high convert efficiency. However, the high loading of Pt-based catalysts on the cathode oxygen reduction reaction (ORR) hinder the commercial application of PEMFCs for the high price, resource shortage and easy poisoning of Pt. Thus, developing inexpensive, high performance and durability non-noble metal cathode catalysts will promote the large-scale commercialization of PEMFCs. As the most likely alternative to Pt, carbon-based non-noble ORR catalysts have been widely studied. In this review, firstly, the electrocatalytic mechanism for ORR is simply introduced. Secondly, the carbon-based non-noble ORR catalysts are divided into transition metal-nitrogen-carbon compounds (M-N-C) and non-metal heteroatom-doped carbon catalysts; the researches of material preparations and active sites are summarized and discussed. Thirdly, the applications of carbon-based non-noble ORR catalysts in PEMFC are reviewed. Although great progress has been achieved in this area of research and development, there are still some challenges for carbon-based non-noble ORR catalysts. Firstly, the ORR electrocatalytic mechanism isn't clear, especially carbon-based non-noble catalysts. Secondly, the ORR active sites of carbon-based non-noble catalysts remain controversial, which can be mainly divided into the transition metal coordination compounds, the doped heteroatom, the filled metal and the defect sites. Thirdly, the actual activity and stability of carbon-based non-noble catalysts are still below the PEMFC target. In summary, the future research directions on carbon-based non-noble catalysts for PEMFC applications would be proposed as follows:(1) fundamentally understanding the ORR mechanisms and their relationship with catalyst active site structures and composition using both theoretical calculations and experimental approaches; (2) improving catalyst activity and stability to satisfy the practical application of PEMFC. © 2017 Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences.",Carbon material; Doped; Fuel cells; Non-noble metal catalyst; Oxygen reduction reaction; Single cell; Transition metal nitrogen carbon,,Carbon material;Doped;Fuel cells;Non-noble metal catalyst;Oxygen reduction reaction;Single cell;Transition metal nitrogen carbon,"F. Peng; School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China; email: cefpeng@scut.edu.cn",,,,,,Science Press bcanji@mail.sioc.ac.cn,05677351,,,,Chinese,Acta Chim. Sin.,Review,Scopus,,2-s2.0-85037817238,,China,scut.edu.cn,,,"Zhong, G.; Wang, H.; Yu, H.; Peng, F."
"Zhou, X.J., Qiao, J.L., Yang, L., Zhang, J.J.",A Review of Graphene-Based Nanostructural Materials for Both Catalyst Supports and Metal-Free Catalysts in PEM Fuel Cell Oxygen Reduction Reactions,2014,ADVANCED ENERGY MATERIALS,4,8,1301523,,,25,505,10.1002/aenm.201301523,,"[Zhou, Xuejun; Qiao, Jinli] Donghua Univ, Coll Environm Sci & Engn, Shanghai 201620, Peoples R China; [Qiao, Jinli; Yang, Lin; Zhang, Jiujun] Henan Normal Univ, Key Lab Green Chem Media & React, Minist Educ, Sch Chem & Chem Engn, Xinxiang 453007, Peoples R China; [Zhang, Jiujun] Natl Res Council Canada, NRC Energy Min & Environm, Vancouver, BC V6T 1W5, Canada",,"A comprehensive overview and description of graphene-based nanomaterials explored in recent years for catalyst supports and metal-free catalysts for polymer electrolyte membrane (PEM) fuel cell oxygen reduction reactions (ORR) is presented. The catalyst material structures/morphologies, material selection, and design for synthesis, catalytic performance, catalytic mechanisms, and theoretical approaches for catalyst down-selection and catalyzed ORR mechanisms are emphasized with respect to the performance of ORR catalysts in terms of both activity and stability. When graphene-based materials, including graphene and doped graphene, are used as the supporting materials for both Pt/Pt alloy catalysts and non-precious metal catalyst, the resulting ORR catalysts can give superior catalyst activity and stability compared to those of conventional carbon-supported catalysts; when they are used as metal-free ORR catalysts, significant catalytic activity and stability are observed. The nitrogen-doped graphene materials even show superior performance compared to supported metal catalysts. Challenges including the lack of material mass production, unoptimized catalyst structure/morphology, insufficient fundamental understanding, and testing tools/protocols for performance optimization and validation are identified, and approaches to address these challenges are suggested.",,NITROGEN-DOPED GRAPHENE; ONE-POT SYNTHESIS; ELECTROCATALYTIC ACTIVITY; PLATINUM NANOPARTICLES; EFFICIENT ELECTROCATALYST; ALLOY NANOPARTICLES; CARBON NANOTUBES; FUNCTIONALIZED GRAPHENE; CATHODE ELECTROCATALYST; SOLVOTHERMAL SYNTHESIS,NITROGEN-DOPED GRAPHENE;ONE-POT SYNTHESIS;ELECTROCATALYTIC ACTIVITY;PLATINUM NANOPARTICLES;EFFICIENT ELECTROCATALYST;ALLOY NANOPARTICLES;CARBON NANOTUBES;FUNCTIONALIZED GRAPHENE;CATHODE ELECTROCATALYST;SOLVOTHERMAL SYNTHESIS,qiaojl@dhu.edu.cn; yanglin1819@163.com; jiujun.zhang@nrc.gc.ca,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1614-6832,,,,English,ADV ENERGY MATER,Review,WoS,Chemistry; Energy & Fuels; Materials Science; Physics,WOS:000338020900006,2-s2.0-84902117906,China;Canada,dhu.edu.cn,Donghua Univ;Henan Normal Univ;Natl Res Council Canada,"Donghua Univ, China;Henan Normal Univ, China;Natl Res Council Canada, Canada","Zhou, Xuejun; Qiao, Jinli; Yang, Lin; Zhang, Jiujun"
"Zhuang, S., Nunna, B.B., Mandal, D., Lee, E.S.","A review of nitrogen-doped graphene catalysts for proton exchange membrane fuel cells-synthesis, characterization, and improvement",2018,Nano-Structures and Nano-Objects,15,,,140,152,,44,10.1016/j.nanoso.2017.09.003,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85031094309&doi=10.1016%2Fj.nanoso.2017.09.003&partnerID=40&md5=3ea5e7e6235513c3d4c188c2656d62bb,"Advanced Energy Systems and Microdevices Laboratory, Newark College of Engineering, Newark, NJ, United States","Zhuang, Shiqiang, Advanced Energy Systems and Microdevices Laboratory, Newark College of Engineering, Newark, NJ, United States; Nunna, Bharath Babu, Advanced Energy Systems and Microdevices Laboratory, Newark College of Engineering, Newark, NJ, United States; Mandal, Debdyuti, Advanced Energy Systems and Microdevices Laboratory, Newark College of Engineering, Newark, NJ, United States; Lee, Eon Soo, Advanced Energy Systems and Microdevices Laboratory, Newark College of Engineering, Newark, NJ, United States","Platinum group metals (PGM), such as platinum (Pt) or ruthenium (Ru), are the most common catalyst materials for the oxygen reduction reaction (ORR) because of their excellent catalytic performance. However, the high raw material cost of PGM catalysts has become a significant issue. Currently, the nitrogen-doped graphene (N-G) catalyst emerges as one of the promising non-PGM catalysts with the advantages of low cost and high ORR catalytic performance to replace expensive PGM catalysts in electrochemical systems. This paper reviews the investigation of N-G catalysts through the synthesis, characterization, and improvement methodologies. And comparisons between various chemical and mechanochemical synthesis methods and the properties of final N-G catalysts are discussed as well. The paper also reviewed a nanoscale high energy wet ball milling (NHEW) method which was investigated recently for the synthesis of N-G catalysts. Recent research results show that the performance of the N-G catalyst is already comparable to the commercialized Pt/C catalyst. It is also possible to enhance the electrochemical performance of N-G catalysts by the modification of metal organic framework (MOF) materials. The new MOF-modified N-G catalyst shows higher current density than Pt/C catalyst. © 2017 Elsevier B.V.",,,,"E.S. Lee; Advanced Energy Systems and Microdevices Laboratory, Department of Mechanical and Industrial Engineering, New Jersey Institute of Technology, Newark, 07102, United States; email: eonsoo.lee@njit.edu",,,,,,Elsevier B.V.,,,,,English,Nano-Struct. Nano-Objects,Review,Scopus,,2-s2.0-85031094309,,United States,njit.edu,,,"Zhuang, S.; Nunna, B.B.; Mandal, D.; Lee, E.S."
"Liu, G., Li, X.G., Lee, J.W., Popov, B.N.",A review of the development of nitrogen-modified carbon-based catalysts for oxygen reduction at USC,2011,CATALYSIS SCIENCE & TECHNOLOGY,1,2,,207,217,11,220,10.1039/c0cy00053a,,"[Liu, Gang; Li, Xuguang; Lee, Jong-Won; Popov, Branko N.] Univ S Carolina, Dept Chem Engn, Ctr Electrochem Engn, Columbia, SC 29208 USA",,"In this review, the development of non-precious nitrogen-modified carbon-based catalysts for oxygen reduction reaction (ORR) is described, mainly focusing on our research at the University of South Carolina (USC). Metal-free; metal-containing; and template-assisted metal-containing, nitrogen-modified carbon-based catalysts were developed in our group in the past few years. From the characterization and analysis of the synthesized nitrogen-modified carbon-based catalysts, we proposed our viewpoints on the nature of the ORR active sites and performance degradation mechanisms of this type of non-precious metal catalysts. Suggested research and development directions for non-precious nitrogen-modified carbon-based catalysts were also discussed.",,PLATINUM-GROUP METALS; OXIDE-BASED COMPOUND; PEM FUEL-CELLS; COMPOSITE CATALYSTS; O-2 REDUCTION; ACTIVE-SITES; ELECTROCATALYTIC ACTIVITY; CATHODE; STABILITY; ALLOY,PLATINUM-GROUP METALS;OXIDE-BASED COMPOUND;PEM FUEL-CELLS;COMPOSITE CATALYSTS;O-2 REDUCTION;ACTIVE-SITES;ELECTROCATALYTIC ACTIVITY;CATHODE;STABILITY;ALLOY,popov@cec.sc.edu,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2044-4753,,,,English,CATAL SCI TECHNOL,Review,WoS,Chemistry,WOS:000294009000005,,United States,cec.sc.edu,Univ S Carolina,"Univ S Carolina, United States","Liu, Gang; Li, Xuguang; Lee, Jong-Won; Popov, Branko N."
"Banham, D., Ye, S., Pei, K., Ozaki, J., Kishimoto, T., Imashiro, Y.",A review of the stability and durability of non-precious metal catalysts for the oxygen reduction reaction in proton exchange membrane fuel cells,2015,JOURNAL OF POWER SOURCES,285,,,334,348,15,521,10.1016/j.jpowsour.2015.03.047,,"[Banham, Dustin; Ye, Siyu; Pei, Katie] Ballard Power Syst, Burnaby, BC V5J 5J8, Canada; [Ozaki, Jun-ichi] Gunma Univ, Div Environm Engn Sci, Grad Sch Sci & Technol, Kiryu, Gunma 3768515, Japan; [Kishimoto, Takeaki; Imashiro, Yasuo] Nisshinbo Holdings Inc, Business Dev Dept, Chiba 2670056, Japan",,"A major hurdle to the widespread commercialization of proton exchange membrane fuel cells (PEMFCs) is the high loading of noble metal (Pt/Pt-alloy) catalyst at the cathode, which is necessary to facilitate the inherently sluggish oxygen reduction reaction (ORR). To eliminate the use of Pt/Pt-alloy catalysts at the cathode of PEMFCs and thus significantly reduce the cost, extensive research on non-precious metal catalysts (NPMCs) has been carried out over the past decade. Major advances in improving the ORR activity of NPMCs, particularly Fe- and Co-based NPMCs, have elevated these materials to a level at which they can start to be considered as potential alternatives to Pt/Pt-alloy catalysts. Unfortunately, the stability (performance loss following galvanostatic experiments) of these materials is currently unacceptably low and the durability (performance loss following voltage cycling) remains uncertain. The three primary mechanisms of instability are: (a) Leaching of the metal site, (b) Oxidative attack by H2O2, and (c) Protonation followed by possible anion adsorption of the active site. While (a) has largely been solved, further work is required to understand and prevent losses from (b) and/or (c). Thus, this review is focused on historical progress in (and possible future strategies for) improving the stability/durability of NPMCs. (C) 2015 Elsevier B.V. All rights reserved.",Non-precious metal catalysts; Proton exchange membrane fuel cell; Oxygen reduction reaction (ORR); Stability; Electrocatalysis,CARBON COMPOSITE CATALYSTS; NITROGEN THIN-FILMS; FE-BASED CATALYSTS; HEAT-TREATED IRON; TRANSITION-METAL; O-2 REDUCTION; ELECTROCATALYTIC ACTIVITY; CATHODE; CORROSION; NANOPARTICLES,Non-precious metal catalysts;Proton exchange membrane fuel cell;Oxygen reduction reaction (ORR);Stability;Electrocatalysis;CARBON COMPOSITE CATALYSTS;NITROGEN THIN-FILMS;FE-BASED CATALYSTS;HEAT-TREATED IRON;TRANSITION-METAL;O-2 REDUCTION;ELECTROCATALYTIC ACTIVITY;CATHODE;CORROSION;NANOPARTICLES,dustin.banham@ballard.com,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0378-7753,,,,English,J POWER SOURCES,Review,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:000354140800040,2-s2.0-84925386614,Canada;Japan,ballard.com,Ballard Power Syst;Gunma Univ;Nisshinbo Holdings Inc,"Ballard Power Syst, Canada;Gunma Univ, Japan;Nisshinbo Holdings Inc, Japan","Banham, Dustin; Ye, Siyu; Pei, Katie; Ozaki, Jun-ichi; Kishimoto, Takeaki; Imashiro, Yasuo"
"Zhuang, S.Q., Shi, X., Lee, E.S.",A REVIEW ON NON-PGM CATHODE CATALYSTS FOR POLYMER ELECTROLYTE MEMBRANE (PEM) FUEL CELL,2016,"PROCEEDINGS OF THE ASME 13TH FUEL CELL SCIENCE, ENGINEERING, AND TECHNOLOGY CONFERENCE, 2015",,,V001T04A005,,,11,2,,,"[Zhuang, Shiqiang; Shi, Xuan; Lee, Eon Soo] New Jersey Inst Technol, Dept Mech Engn, Newark, NJ 07102 USA",,"In recent years, people attach high attention to the energy problem owing to the energy shortage of the world. Since the price of energy resources significantly increases, it is a necessary requirement to develop new alternative sources of energy to replace non-renewable energy resources. Polymer electrolyte membrane (PEM) fuel cell technology is one of the promising fields of clean and sustainable power, which is based on direct conversion of fuel into electricity. However, at the present moment PEM fuel cell is unable to be successful commercialization. The main factor is the high cost of materials in catalyst layer which is a core part of PEM fuel cell. In order to reduce the overall system cost, developing active, inexpensive non-platinum group metal (non-PGM) electrode catalysts to replace currently used Platinum (Pt)-based catalysts is a necessary and essential requirement. This paper reviews several important kinds of non-PGM electrocatalysts with different elements, such as nitrogen, transition metal, and metal organic frameworks (MOF). Among these catalysts, transition metal nitrogen-containing complexes supported on carbon materials (M-N/C) are considered the most potential oxidation reduction reaction (ORR) catalysts. The main synthetic methods are high temperature heat treating (800-1000 degrees C). The mechanical and electrochemical properties of the final product will be analyzed by several characterization methods. For example, a RRDE test will be used to measure electron transfer number and ORR reactivity, which are the most important electrochemical properties of the new catalyst. And the morphology, particle size, crystal phase and specific surface area can be analyzed with SEM, TEM, XRD and BET methods. Although great improvement has been achieved in non-PGM catalyst area of research, there are still some challenges in both ORR activity and stability of non-PGM catalysts. Consequently, how to improve the ORR activity and stability are the major challenge of non-PGM catalyst research and development. Based on the results achieved in this area, our future research direction is also presented and discussed in this paper.",,OXYGEN REDUCTION REACTION; FE-BASED CATALYSTS; NITROGEN-DOPED GRAPHENE; FE/N/C-CATALYSTS; CARBON NANOTUBES; ACTIVE-SITES; IRON; ELECTROCATALYSTS; MOSSBAUER; PYROLYSIS,OXYGEN REDUCTION REACTION;FE-BASED CATALYSTS;NITROGEN-DOPED GRAPHENE;FE/N/C-CATALYSTS;CARBON NANOTUBES;ACTIVE-SITES;IRON;ELECTROCATALYSTS;MOSSBAUER;PYROLYSIS,Sz86@njit.edu; Eonsoo.lee@njit.edu,,"THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA","13th ASME Fuel Cell Science, Engineering, and Technology Conference","San Diego, CA","JUN 28-JUL 02, 2015",AMER SOC MECHANICAL ENGINEERS,,978-0-7918-5661-1,,,English,,Proceedings Paper,WoS,Electrochemistry; Energy & Fuels; Engineering,WOS:000371648500013,2-s2.0-84962137652,United States,njit.edu,New Jersey Inst Technol,"New Jersey Inst Technol, United States","Zhuang, Shiqiang; Shi, Xuan; Lee, Eon Soo"
"Chen, Z.W., Higgins, D., Yu, A.P., Zhang, L., Zhang, J.J.",A review on non-precious metal electrocatalysts for PEM fuel cells,2011,ENERGY & ENVIRONMENTAL SCIENCE,4,9,,3167,3192,26,1774,10.1039/c0ee00558d,,"[Chen, Zhongwei; Higgins, Drew; Yu, Aiping] Univ Waterloo, Dept Chem Engn, Waterloo Inst Nanotechnol, Waterloo Inst Sustainable Energy, Waterloo, ON N2L 3G1, Canada; [Zhang, Lei; Zhang, Jiujun] Natl Res Council Canada, Inst Fuel Cell Innovat, Vancouver, BC V6T 1W5, Canada",,"With the approaching commercialization of PEM fuel cell technology, developing active, inexpensive non-precious metal ORR catalyst materials to replace currently used Pt-based catalysts is a necessary and essential requirement in order to reduce the overall system cost. This review paper highlights the progress made over the past 40 years with a detailed discussion of recent works in the area of non-precious metal electrocatalysts for oxygen reduction reaction, a necessary reaction at the PEM fuel cell cathode. Several important kinds of unsupported or carbon supported non-precious metal electrocatalysts for ORR are reviewed, including non-pyrolyzed and pyrolyzed transition metal nitrogen-containing complexes, conductive polymer-based catalysts, transition metal chalcogenides, metal oxides/carbides/nitrides/oxynitrides/carbonitrides, and enzymatic compounds. Among these candidates, pyrolyzed transition metal nitrogen-containing complexes supported on carbon materials (M N-x/C) are considered the most promising ORR catalysts because they have demonstrated some ORR activity and stability close to that of commercially available Pt/C catalysts. Although great progress has been achieved in this area of research and development, there are still some challenges in both their ORR activity and stability. Regarding the ORR activity, the actual volumetric activity of the most active non-precious metal catalyst is still well below the DOE 2015 target. Regarding the ORR stability, stability tests are generally run at low current densities or low power levels, and the lifetime is far shorter than targets set by DOE. Therefore, improving both the ORR activity and stability are the major short and long term focuses of non-precious metal catalyst research and development. Based on the results achieved in this area, several future research directions are also proposed and discussed in this paper.",,OXYGEN-REDUCTION REACTION; FE-BASED CATALYSTS; HIGH-AREA CARBON; COBALT TETRAMETHOXYPHENYL PORPHYRIN; MEDIATED BIOCATALYTIC CATHODES; HEAT-TREATED POLYACRYLONITRILE; PYROLYTIC-GRAPHITE ELECTRODES; SODIUM TUNGSTEN BRONZES; WIRED LACCASE CATHODE; O-2 REDUCTION,OXYGEN-REDUCTION REACTION;FE-BASED CATALYSTS;HIGH-AREA CARBON;COBALT TETRAMETHOXYPHENYL PORPHYRIN;MEDIATED BIOCATALYTIC CATHODES;HEAT-TREATED POLYACRYLONITRILE;PYROLYTIC-GRAPHITE ELECTRODES;SODIUM TUNGSTEN BRONZES;WIRED LACCASE CATHODE;O-2 REDUCTION,zhwchen@uwaterloo.ca,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,1754-5692,,,,English,ENERG ENVIRON SCI,Review,WoS,Chemistry; Energy & Fuels; Engineering; Environmental Sciences & Ecology,WOS:000294306900007,2-s2.0-80052192526,Canada,uwaterloo.ca,Univ Waterloo;Natl Res Council Canada,"Univ Waterloo, Canada;Natl Res Council Canada, Canada","Chen, Zhongwei; Higgins, Drew; Yu, Aiping; Zhang, Lei; Zhang, Jiujun"
"Bilay, C., Mandal, A., Palaniswamy, K., Devaraj, E., Ravi, D., Geca, M.J., Rajagopal, T.K.R.","A review on the role of membrane electrode assembly in the steady-state, transient performance, and durability of proton exchange membrane fuel cells",2025,AIN SHAMS ENGINEERING JOURNAL,16,12,103739,,,45,1,10.1016/j.asej.2025.103739,,"[Bilay, Chinmay; Mandal, Agnidip; Rajagopal, Thundil Karuppa Raj] VIT, Sch Mech Engn, Vellore 632014, India; [Palaniswamy, Karthikeyan] PSG Coll Technol, Dept Automobile Engn, Coimbatore, India; [Devaraj, Elangovan] VIT Vellore, TIFAC CORE, Vellore, India; [Devaraj, Elangovan] VIT Vellore, Sch Elect Engn, Vellore, India; [Ravi, Dineshkumar; Geca, Michal Jan] Lublin Univ Technol, Fac Mech Engn, PL-20618 Lublin, Poland",,"Proton Exchange Membrane Fuel Cells (PEMFCs) have emerged as promising energy conversion devices for mainly automotive applications in order to address the latest global issues of climatic change. PEMFC has two main-fold advantages: the first being it's almost zero emission as its end product is only water and the other being its efficiency as is not bounded by second law of thermodynamics, hence its theoretical efficiency is as high as 95%. PEMFC is preferred for automobiles as they exhibit high energy efficiency, low operating temperatures, and low emissions, making them suited for a wide range of applications, including automotive, stationary power production, and portable devices. This present article summarizes the latest state of the global art PEMFC technology and corresponding advancement with respect to low cost highly efficient materials for catalyst, membrane electrolyte, gas diffusion layers with their limitations. The study dwells upon study of GDLs and new innovations in its materials to improve diffusivity of gas layer and improved water management strategies which overcome water flooding as well as thermal bursting of membranes. Key advancements include the development of efficient new materials for catalyst namely non-platinum/non-precious metal catalyst, and platinum alloy materials which are highly cost effective. Numerous researches have been carried out to replace conventional Nafion membrane with more economical alternatives like poly benzimidazole (PBI), sulfonated poly arylene ether sulfone (SPAES) and poly ether-ether-ketone (PEEK) with almost equivalent performance. Optimal current density in order to avoid back diffusion of water through membrane has been established and reported. We have critically reviewed the steady and dynamics performance of Catalysis and Membrane and durability on MEAS for Automotive applications. Also, techno eeconomic analysis of Alternative MEA Materials has been revealed with Strategic Recommendations. Conclusions also clearly depicting the future research directions and unresolved issues on PEMFC development.",PEMFC; Gas diffusion layer (GDL); Polytetrafluoroethylene (PTFE) membrane; Platinum modified catalyst; Non-precious metal catalyst (NPMC); Performance and durability,GAS-DIFFUSION LAYER; FE-BASED CATALYSTS; OXYGEN REDUCTION CATALYSTS; LIQUID WATER TRANSPORT; HIGH-TEMPERATURE; NONNOBLE ELECTROCATALYST; COMPOSITE MEMBRANES; CARBON CATALYSTS; METAL-CATALYSTS; C-N,PEMFC;Gas diffusion layer (GDL);Polytetrafluoroethylene (PTFE) membrane;Platinum modified catalyst;Non-precious metal catalyst (NPMC);Performance and durability;GAS-DIFFUSION LAYER;FE-BASED CATALYSTS;OXYGEN REDUCTION CATALYSTS;LIQUID WATER TRANSPORT;HIGH-TEMPERATURE;NONNOBLE ELECTROCATALYST;COMPOSITE MEMBRANES;CARBON CATALYSTS;METAL-CATALYSTS;C-N,thundil.rajagopal@vit.ac.in,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2090-4479,,,,English,AIN SHAMS ENG J,Review,WoS,Engineering,WOS:001588484200002,2-s2.0-105017616907,India;Poland,vit.ac.in,VIT;PSG Coll Technol;VIT Vellore;Lublin Univ Technol,"VIT, India;PSG Coll Technol, India;VIT Vellore, India;Lublin Univ Technol, Poland","Bilay, Chinmay; Mandal, Agnidip; Palaniswamy, Karthikeyan; Devaraj, Elangovan; Ravi, Dineshkumar; Geca, Michal Jan; Rajagopal, Thundil Karuppa Raj"
"Chenitz, R., Kramm, U.I., Lefevre, M., Glibin, V., Zhang, G., Sun, S., Dodelet, J.P.",A specific demetalation of Fe-N4 catalytic sites in the micropores of NC-Ar + NH3 is at the origin of the initial activity loss of the highly active Fe/N/C catalyst used for the reduction of oxygen in PEM fuel cells,2018,Energy and Environmental Science,11,2,,365,382,,341,10.1039/c7ee02302b,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85042183121&doi=10.1039%2Fc7ee02302b&partnerID=40&md5=375841493aa176446fbf3f8e9ed91a4b,"Matériaux et Télécommunications, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Department of Materials and Earth Sciences, Technische Universität Darmstadt, Darmstadt, Hessen, Germany; Canetique Electrocatalysis Inc., Varennes, QC, Canada; Department of Chemical and Biochemical Engineering, Western University, London, ON, Canada","Chenitz, Régis, Matériaux et Télécommunications, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Kramm, Ulrike Ingrid, Department of Materials and Earth Sciences, Technische Universität Darmstadt, Darmstadt, Hessen, Germany; Lefèvre, Michel, Canetique Electrocatalysis Inc., Varennes, QC, Canada; Glibin, Vassili P., Department of Chemical and Biochemical Engineering, Western University, London, ON, Canada; Zhang, Gaixia, Matériaux et Télécommunications, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Sun, Shuhui, Matériaux et Télécommunications, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Dodelet, Jean Pol, Matériaux et Télécommunications, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada","In this study, we explored the behavior of NC-Ar + NH<inf>3</inf>, an initially highly active catalyst for oxygen electroreduction, in H<inf>2</inf>/air fuel cells from 0.8 to 0.2 V at 80 °C and 25 °C, in order to find the causes of its instability. We discovered that the decay of the current density always involves the superposition of fast and slow first order kinetics, for which half-lives were obtained. The half-life of the fast decay was practically the same at all potentials and temperatures with a value of around 138 ± 55 min, while the half-life of the slow decay greatly varied from a minimum of ≈2400 min (40 h) to infinity. From the adsorption-desorption isotherm of NC-Ar + NH<inf>3</inf>, it was deduced that the Fe/N/C carbonaceous catalyst is characterized by interconnected open-end slit-shaped micropores, in which water (with dissolved H+ and O<inf>2</inf>) quickly flows in the fuel cells if their width is ≥0.7 nm as it has no interaction with the hydrophobic walls of the micropores. The driving force of this quick water flow is the humidified air streaming through the working cathode. Fe-N<inf>4</inf>-like active sites are thermodynamically stable in stagnant acidic conditions, but according to the Le Chatelier principle, they demetalate in the flux of water running into the micropores. This specific demetalation is the cause of the initial loss of ORR activity of NC-Ar + NH<inf>3</inf> catalysts assigned to the fast current decay in fuel cells. © 2018 The Royal Society of Chemistry.",,Catalysts; Electrolytic reduction; Flow of water; Gas fuel purification; Hydrophobicity; Microporosity; Oxygen; Proton exchange membrane fuel cells (PEMFC); Acidic conditions; Adsorption desorption isotherms; Carbonaceous catalyst; First order kinetics; Le chatelier principle; Oxygen electro reductions; Reduction of oxygen; Thermodynamically stable; Iron compounds; adsorption; catalysis; catalyst; chemical reaction; desorption; electrochemical method; fuel cell; inorganic compound; isotherm; oxygen; reaction kinetics; reduction; thermodynamics; water flow,Catalysts;Electrolytic reduction;Flow of water;Gas fuel purification;Hydrophobicity;Microporosity;Oxygen;Proton exchange membrane fuel cells (PEMFC);Acidic conditions;Adsorption desorption isotherms;Carbonaceous catalyst;First order kinetics;Le chatelier principle;Oxygen electro reductions;Reduction of oxygen;Thermodynamically stable;Iron compounds;adsorption;catalysis;catalyst;chemical reaction;desorption;electrochemical method;fuel cell;inorganic compound;isotherm;reaction kinetics;reduction;thermodynamics;water flow,"J.-P. Dodelet; INRS-Énergie, Matériaux et Télécommunications, Boulet Varennes, 1650 Boulevard Lionel, J3X 1S2, Canada; email: dodelet@emt.inrs.ca",,,,,,Royal Society of Chemistry,17545692,,,,English,Energy Environ. Sci.,Article,Scopus,,2-s2.0-85042183121,,Canada;Germany,emt.inrs.ca,,,"Chenitz, R.; Kramm, U.I.; Lefevre, M.; Glibin, V.; Zhang, G.; Sun, S.; Dodelet, J.-P."
"Li, Y., Sun, H., Ren, L., Sun, K., Gao, L., Jin, X., Xu, Q., Liu, W., Sun, X.",Asymmetric Coordination Regulating D-Orbital Spin-Electron Filling in Single-Atom Iron Catalyst for Efficient Oxygen Reduction,2024,Angewandte Chemie - International Edition,63,28,e202405334,,,,108,10.1002/anie.202405334,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85194923423&doi=10.1002%2Fanie.202405334&partnerID=40&md5=8f6309d58334c0097438a1dcc716657f,"State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China; School of Chemical Sciences, University of Auckland, Auckland, AUK, New Zealand","Li, Yizhe, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China; Sun, Hao, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China; Ren, Longtao, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China; Sun, Kai, School of Chemical Sciences, University of Auckland, Auckland, AUK, New Zealand; Gao, Liyao, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China; Jin, Xiangrong, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China; Xu, Qingzhen, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China; Liu, Wen, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China; Sun, Xiaoming, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China","The single-atom Fe−N−C catalyst has shown great promise for the oxygen reduction reaction (ORR), yet the intrinsic activity is not satisfactory. There is a pressing need to gain a deeper understanding of the charge configuration of the Fe−N−C catalyst and to develop rational modulation strategies. Herein, we have prepared a single-atom Fe catalyst with the co-coordination of N and O (denoted as Fe−N/O−C) and adjacent defect, proposing a strategy to optimize the d-orbital spin-electron filling of Fe sites by fine-tuning the first coordination shell. The Fe−N/O−C exhibits significantly better ORR activity compared to its Fe−N−C counterpart and commercial Pt/C, with a much more positive half-wave potential (0.927 V) and higher kinetic current density. Moreover, using the Fe−N/O−C catalyst, the Zn-air battery and proton exchange membrane fuel cell achieve peak power densities of up to 490 and 1179 mW cm−2, respectively. Theoretical studies and in situ electrochemical Raman spectroscopy reveal that Fe−N/O−C undergoes charge redistribution and negative shifting of the d-band center compared to Fe−N−C, thus optimizing the adsorption free energy of ORR intermediates. This work demonstrates the feasibility of introducing an asymmetric first coordination shell for single-atom catalysts and provides a new optimization direction for their practical application. © 2024 Wiley-VCH GmbH.",fuel cell; oxygen reduction; single atom catalyst; spin polarization; Zn-air battery,Atoms; Catalysts; Electrolytic reduction; Free energy; Iron; Oxygen; Proton exchange membrane fuel cells (PEMFC); Zinc air batteries; Coordination shells; D orbitals; Electron filling; Oxygen Reduction; Oxygen reduction reaction; Single atom catalyst; Single-atoms; Spin electrons; Spin-polarization; ]+ catalyst; Spin polarization,fuel cell;oxygen reduction;single atom catalyst;spin polarization;Zn-air battery;Atoms;Catalysts;Electrolytic reduction;Free energy;Iron;Oxygen;Proton exchange membrane fuel cells (PEMFC);Zinc air batteries;Coordination shells;D orbitals;Electron filling;Oxygen reduction reaction;Single-atoms;Spin electrons;Spin-polarization;]+ catalyst,"W. Liu; State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science Engineering, Beijing University of Chemical Technology, Beijing, 100029, China; email: wenliu@mail.buct.edu.cn; X. Sun; State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science Engineering, Beijing University of Chemical Technology, Beijing, 100029, China; email: sunxm@mail.buct.edu.cn",,,,,,John Wiley and Sons Inc,14337851,,ACIEF,,English,Angew. Chem. Int. Ed.,Article,Scopus,,2-s2.0-85194923423,,China;New Zealand,mail.buct.edu.cn,,,"Li, Y.; Sun, H.; Ren, L.; Sun, K.; Gao, L.; Jin, X.; Xu, Q.; Liu, W.; Sun, X."
"Shubair, A., Gowling, A.C., Sundari Babu, V., Meek, K.M.",Asymmetric Electrode Ionomers Based on Polydiallyldimethylammonium Block Copolymers for Enhanced Performance in Anion Exchange Membrane Fuel Cells,2025,Journal of the Electrochemical Society,172,2,024503,,,,1,10.1149/1945-7111/adb2e9,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85217911541&doi=10.1149%2F1945-7111%2Fadb2e9&partnerID=40&md5=c6906c2529dc2ad2f8e5864c67e5d067,"Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, ON, Canada; Department of Chemical and Materials Engineering, Concordia University, Montreal, QC, Canada","Shubair, Asma, Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, ON, Canada; Gowling, Alannah C., Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, ON, Canada, Department of Chemical and Materials Engineering, Concordia University, Montreal, QC, Canada; Sundari Babu, Varshini, Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, ON, Canada; Meek, Kelly M., Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, ON, Canada, Department of Chemical and Materials Engineering, Concordia University, Montreal, QC, Canada","Fuel cells offer a promising solution for clean energy conversion, with anion exchange membrane fuel cells (AEMFCs) being particularly attractive for their potential to use less expensive, non-platinum group metal (non-PGM) catalysts. Despite significant progress in AEMFCs in recent years, their performance is limited by instability often resulting from water imbalance within the cell (e.g, anode flooding, cathode dry-out). Implementing asymmetric electrode anion exchange ionomers (AEIs), i.e., using a hydrophobic AEI at the anode to inhibit swelling and a hydrophilic AEI at the cathode to prevent water depletion, could overcome issues of poor water management. In this study, block copolymer (BCP) AEIs of polydiallyldimethylammonium hydroxide-block-polystyrene (PDADMAOH-b-PS) were synthesized via reversible addition-fragmentation chain transfer polymerization, achieving ion exchange capacities of 1.03 to 3.40 mmol g−1. These BCP AEIs were employed in the AEMFCs to optimize water distribution by controlling the hydrophobicity/hydrophilicity of the gas diffusion layers. Our results demonstrated lower ohmic losses and mass transport limitations in the asymmetric electrode design vs the symmetric analog. © 2025 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.",energy conversion; fuel cells - AEM; ionomer; membrane electrode assemblies,Anionic polymerization; Diffusion in gases; Free radical polymerization; Gas fuel purification; Gas sensing electrodes; Ion exchange membranes; Negative ions; Palladium compounds; Positive ions; Proton exchange membrane fuel cells (PEMFC); Silicones; Solar power generation; Water aeration; Anion exchange Ionomer; Anion-exchange membrane fuel cells; Asymmetric electrodes; Block co polymers; Clean energy; Energy; Fuel cell - AEM; Membrane electrode assemblies; Non-platinum; Performance; Ionomers,energy conversion;fuel cells - AEM;ionomer;membrane electrode assemblies;Anionic polymerization;Diffusion in gases;Free radical polymerization;Gas fuel purification;Gas sensing electrodes;Ion exchange membranes;Negative ions;Palladium compounds;Positive ions;Proton exchange membrane fuel cells (PEMFC);Silicones;Solar power generation;Water aeration;Anion exchange Ionomer;Anion-exchange membrane fuel cells;Asymmetric electrodes;Block co polymers;Clean energy;Energy;Fuel cell - AEM;Non-platinum;Performance;Ionomers,,,,,,,Institute of Physics,00134651,,JESOA,,English,J Electrochem Soc,Article,Scopus,,2-s2.0-85217911541,,Canada,No email,,,"Shubair, A.; Gowling, A.C.; Sundari Babu, V.; Meek, K.M."
"Cheng, Y., Zhang, J.Y., Wu, X., Tang, C.J., Yang, S.Z., Su, P.P., Thomsen, L., Zhao, F.P., Lu, S.F., Liu, J., Jiang, S.P.",A template-free method to synthesis high density iron single atoms anchored on carbon nanotubes for high temperature polymer electrolyte membrane fuel cells,2021,NANO ENERGY,80,,105534,,,9,55,10.1016/j.nanoen.2020.105534,,"[Cheng, Yi; Wu, Xing; Tang, Chongjian; Zhao, Feiping] Cent South Univ, Sch Met & Environm, Dept Environm Engn, Changsha 410083, Peoples R China; [Zhang, Jinyang] Curtin Univ, Sch Mol & Life Sci, Curtin Inst Funct Mol & Interfaces, Bentley, WA 6102, Australia; [Yang, Shi-ze] Oak Ridge Natl Lab, Mat Sci & Technol Div, POB 2009, Oak Ridge, TN 37831 USA; [Su, Panpan; Liu, Jian] Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, 457 Zhongshan Rd, Dalian 116023, Peoples R China; [Thomsen, Lars] Australian Synchrotron Clayton, Clayton, Vic 3168, Australia; [Lu, Shanfu] Beihang Univ, Sch Space & Environm, Beijing Key Lab Bioinspired Energy Mat & Devices, Beijing 100191, Peoples R China; [Liu, Jian] Univ Surrey, Dept Chem & Proc Engn, Guildford GU2 7XH, Surrey, England; [Jiang, San Ping] Curtin Univ, Fuels & Energy Technol Inst, Perth, WA 6102, Australia; [Jiang, San Ping] Curtin Univ, WA Sch Mines Minerals Energy & Chem Engn, Perth, WA 6102, Australia",,"Carbon supported iron single atom catalysts (FeSA) are promising materials to replace precious and expensive Pt catalysts for oxygen reduction reaction (ORR) in high temperature polymer electrolyte membrane fuel cells (HT-PEMFCs). However, to support high density of atomic iron active sites on conductive carbon supports, such as carbon nanotubes (CNTs), relies on templates to avoid aggregation of iron atoms. Here, a simple and template-free method has been developed to prepare high density iron single atoms supported CNTs. The FeSA with an atomic Fe loading of 3.5 wt% shows an onset potential (E-on) of 0.95 V and a half-wave potential (E-1/2) of 0.801 V for ORR in O-2-saturated 0.1 M HClO4 solution, which is comparable to that of Pt/C (Pt loading of 25 mu g(Pt) cm(-2)). The high ORR performance is resulted from the high-density atomic sites and the highly conductive CNTs-graphene networks. Most importantly, the FeSA exhibits a E-1/2 of 0.80 V, 27 mV more positive than that of Pt/C in 0.2 M H3PO4+0.1M HClO4 electrolyte due to its high phosphate resistance ability. The applicability of as-synthesized FeSA catalysts as precious metal group (PGM)-free cathode has been demonstrated in a HT-PEMFC, delivering a peak power density of 266 mW cm(-2) and excellent stability at 240 degrees C using anhydrous H-2 as fuel. The method provides a facile and practical route for developing highly efficient PGM-free catalysts for HT-PEMFCs.",High temperature polymer electrolyte membrane fuel cells; Precious group metal (PGM)-free catalysts; Fe single atom catalyst; Phosphate tolerance; Oxygen reduction reaction,OXYGEN EVOLUTION REACTION; FE-N/C ELECTROCATALYSTS; REDUCTION ACTIVITY; CATALYSTS; PERFORMANCE; PHOSPHATE; NANOPARTICLES; SITES; ORR; POLYBENZIMIDAZOLE,High temperature polymer electrolyte membrane fuel cells;Precious group metal (PGM)-free catalysts;Fe single atom catalyst;Phosphate tolerance;Oxygen reduction reaction;OXYGEN EVOLUTION REACTION;FE-N/C ELECTROCATALYSTS;REDUCTION ACTIVITY;CATALYSTS;PERFORMANCE;PHOSPHATE;NANOPARTICLES;SITES;ORR;POLYBENZIMIDAZOLE,lusf@buaa.edu.cn; jian.liu@surrey.ac.uk; S.Jiang@curtin.edu.au,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2211-2855,,,,English,NANO ENERGY,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000618006100005,2-s2.0-85094944706,China;Australia;United States;United Kingdom,buaa.edu.cn,Cent South Univ;Curtin Univ;Oak Ridge Natl Lab;Chinese Acad Sci;Australian Synchrotron Clayton;Beihang Univ;Univ Surrey,"Cent South Univ, China;Curtin Univ, Australia;Oak Ridge Natl Lab, United States;Chinese Acad Sci, China;Australian Synchrotron Clayton, Australia;Beihang Univ, China;Univ Surrey, United Kingdom","Cheng, Yi; Zhang, Jinyang; Wu, Xing; Tang, Chongjian; Yang, Shi-ze; Su, Panpan; Thomsen, Lars; Zhao, Feiping; Lu, Shanfu; Liu, Jian; Jiang, San Ping"
"Xu, P.Z., Zhang, Z.Q., Han, L.L.",Atomically dispersed catalysts for formic acid oxidation reaction,2025,JOURNAL OF ENERGY CHEMISTRY,111,,,599,616,18,1,10.1016/j.jechem.2025.07.082,,"[Xu, Peizhu; Zhang, Ziqi; Han, Lili] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China; [Zhang, Ziqi] Fujian Sci & Technol Innovat Lab Optoelect Informa, Fuzhou 350108, Fujian, Peoples R China; [Xu, Peizhu] Univ Chinese Acad Sci, Sch Chem Sci, Beijing 101408, Peoples R China",,"Formic acid holds great potential as a fuel for low-temperature proton-exchange membrane fuel cells and portable power devices because of its excellent safety profile and high energy density. However, formic acid oxidation reactions (FAOR) face challenges such as low catalytic activity, poor stability, and catalyst poisoning. Atomically dispersed catalysts (ADCs) address these issues by providing a direct oxidation pathway, inhibiting catalyst poisoning, and offering well-defined catalytic sites with ultimate atomic efficiency. This review provides a comprehensive summary of recent breakthroughs in ADCs for FAOR. First, we discuss the structural design and mechanism validation methods of ADCs using enhanced sensitivity, in situ/operando, and high-resolution techniques. Next, we summarize bottom-up optimization strategies for ADCs, guided by the structure-activity relationship and reaction mechanisms at the atomic and electronic levels. Finally, we offer insights into device design and scale-up efforts for FAOR applications and provide an overlook from fundamental catalyst design to practical applications. (c) 2025 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights are reserved, including those for text and data mining, AI training, and similar technologies.",Formic acid oxidation reactions; Atomically dispersed catalysts; Structure-activity relationship; Reaction mechanisms,SINGLE-ATOM CATALYSTS; FUEL-CELLS; RECENT PROGRESS; PLATINUM; HYDROGEN; ELECTROCATALYSTS; ELECTROOXIDATION; EVOLUTION; GOLD; NANO,Formic acid oxidation reactions;Atomically dispersed catalysts;Structure-activity relationship;Reaction mechanisms;SINGLE-ATOM CATALYSTS;FUEL-CELLS;RECENT PROGRESS;PLATINUM;HYDROGEN;ELECTROCATALYSTS;ELECTROOXIDATION;EVOLUTION;GOLD;NANO,zhangziqi@fjirsm.ac.cn; llhan@fjirsm.ac.cn,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2095-4956,,,,English,J ENERGY CHEM,Review,WoS,Chemistry; Energy & Fuels; Engineering,WOS:001564136400001,,China,fjirsm.ac.cn,Chinese Acad Sci;Fujian Sci & Technol Innovat Lab Optoelect Informa;Univ Chinese Acad Sci,"Chinese Acad Sci, China;Fujian Sci & Technol Innovat Lab Optoelect Informa, China;Univ Chinese Acad Sci, China","Xu, Peizhu; Zhang, Ziqi; Han, Lili"
"Xue, N., Xue, X.Y., Aihemaiti, A., Zhu, H., Yin, J.",Atomically Dispersed Ce Sites Augmenting Activity and Durability of Fe-Based Oxygen Reduction Catalyst in PEMFC,2024,SMALL,20,29,,,,8,15,10.1002/smll.202311034,,"[Xue, Nan; Xue, Xueyan; Aihemaiti, Aikelaimu; Zhu, Hui; Yin, Jiao] Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Key Lab Funct Mat & Devices Special Environm, Urumqi 830011, Peoples R China; [Xue, Nan; Xue, Xueyan] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China",,"In the cathode of proton exchange membrane fuel cells (PEMFCs), Fe and N co-doped carbon (Fe-N-C) materials with atomically dispersed active sites are one of the satisfactory candidates to replace Pt-based catalysts. However, Fe-N-C catalysts are vulnerable to attack from reactive oxygen species, resulting in inferior durability, and current strategies failing to balance the activity and stability. Here, this study reports Fe and Ce single atoms coupled catalysts anchored on ZIF-8-derived nitrogen-doped carbon (Fe/Ce-N-C) as an efficient ORR electrocatalyst for PEMFCs. In PEMFC tests, the maximum power density of Fe/Ce-N-C catalyst reached up to 0.82 W cm-2, which is 41% larger than that of Fe-N-C. More importantly, the activity of Fe/Ce-N-C catalyst only decreased by 21% after 30 000 cycles under H2/air condition. Density functional theory reveals that the strong coupling between the Fe and Ce sites result in the redistribution of electrons in the active sites, which optimizes the adsorption of OH* intermediates on the catalyst and increases the intrinsic activity. Additionally, the admirable radical scavenging ability of the Ce sites ensured that the catalysts gained long-term stability. Therefore, the addition of Ce single atoms provides a new strategy for improving the activity and durability of oxygen reduction catalysts. Atomically dispersed Fe/Ce-N-C catalyst enhances both ORR activity and durability simultaneously. The Ce sites not only optimize the adsorption energy of the critical intermediate (OH*), but also inhibit the generation of H2O2 and eliminate radicals. In PEMFC tests, Fe/Ce-N-C exhibits a high peak power density of 0.82 W cm-2, and retains 79% of its initial performance after 30 000 cycles. image",activity and durability; Fe-based catalysts; oxygen reduction reaction; proton exchange membrane fuel cell; single-atom site,FUEL-CELLS; PERFORMANCE; DEGRADATION; PLATINUM; IRON,activity and durability;Fe-based catalysts;oxygen reduction reaction;proton exchange membrane fuel cell;single-atom site;FUEL-CELLS;PERFORMANCE;DEGRADATION;PLATINUM;IRON,huizhu@ms.xjb.ac.cn; yinjiao@ms.xjb.ac.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1613-6810,,,38415298,English,SMALL,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:001174002800001,2-s2.0-85186249572,China,ms.xjb.ac.cn,Chinese Acad Sci;Univ Chinese Acad Sci,"Chinese Acad Sci, China;Univ Chinese Acad Sci, China","Xue, Nan; Xue, Xueyan; Aihemaiti, Aikelaimu; Zhu, Hui; Yin, Jiao"
"Meng, Y., An, J.X., Hou, P.X., Liu, C., Li, J.C.",Atomically dispersed Fe/Co-N-C and their composites for proton exchange membrane fuel cells,2024,MATERIALS CHEMISTRY FRONTIERS,8,8,,1927,1949,23,12,10.1039/d3qm01172k,,"[Meng, Yu; Hou, Peng-Xiang; Liu, Chang] Inst Met Sci & Technol, Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China; [An, Jiaxing; Li, Jin-Cheng] Kunming Univ Sci & Technol, Fac Chem Engn, Yunnan Prov Key Lab Energy Saving Phosphorus Chem, Kunming 650000, Peoples R China",,"Seeking cheaper catalysts to replace Pt-based materials for the oxygen reduction reaction (ORR) has always been a key objective in developing green electrochemical energy devices such as fuel cells. Burgeoning atomic Fe/Co-N-C and their composite catalysts are undoubtedly the most promising candidates owing to their low cost, excellent electrical conductivity, high chemical stability, and tunable electronic and geometric structures through nanoengineering strategies. Thus, exploiting efficient Fe/Co-N-C and their composite catalysts is crucial; however, conducting such research poses critical challenges. Herein, recent developments in Fe/Co-N-C and their composite catalysts for the ORR are systematically reviewed, mainly focusing on their applications in proton exchange membrane fuel cells (PEMFCs). Different preparation methods and characterization techniques for atomic Fe/Co sites are summarized, and insights into mechanisms of the ORR on these sites are discussed. Strategies to enhance the activities of Fe/Co-N-C and their composite catalysts are emphasized, along with the corresponding performance of PEMFCs. Finally, prospects for the rational design and future development for practical applications of Fe/Co-N-C and their composite catalysts are presented. Atomically dispersed Fe/Co-N-C and their composites for fuel cells.",,OXYGEN REDUCTION REACTION; SINGLE-ATOM CATALYSTS; DOPED CARBON; HIGH-PERFORMANCE; IRON PHTHALOCYANINE; CATHODE CATALYSTS; FE; ELECTROCATALYSTS; EFFICIENT; COBALT,OXYGEN REDUCTION REACTION;SINGLE-ATOM CATALYSTS;DOPED CARBON;HIGH-PERFORMANCE;IRON PHTHALOCYANINE;CATHODE CATALYSTS;FE;ELECTROCATALYSTS;EFFICIENT;COBALT,jinchengli@kust.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,,,,,English,MATER CHEM FRONT,Review,WoS,Chemistry; Materials Science,WOS:001180749800001,,China,kust.edu.cn,Inst Met Sci & Technol;Kunming Univ Sci & Technol,"Inst Met Sci & Technol, China;Kunming Univ Sci & Technol, China","Meng, Yu; An, Jiaxing; Hou, Peng-Xiang; Liu, Chang; Li, Jin-Cheng"
"Xiao, Z., Sun, P., Qiao, Z., Qiao, K., Xu, H., Wang, S., Cao, D.",Atomically dispersed Fe-Cu dual-site catalysts synergistically boosting oxygen reduction for hydrogen fuel cells,2022,Chemical Engineering Journal,446,,137112,,,,100,10.1016/j.cej.2022.137112,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85131058930&doi=10.1016%2Fj.cej.2022.137112&partnerID=40&md5=8068153308daff291858b1a4b92a5c1f,"Beijing University of Chemical Technology, Beijing, China","Xiao, Zeyu, Beijing University of Chemical Technology, Beijing, China; Sun, Panpan, Beijing University of Chemical Technology, Beijing, China; Qiao, Zelong, Beijing University of Chemical Technology, Beijing, China; Qiao, Kangwei, Beijing University of Chemical Technology, Beijing, China; Xu, Haoxiang, Beijing University of Chemical Technology, Beijing, China; Wang, Shitao, Beijing University of Chemical Technology, Beijing, China; Cao, Dapeng, Beijing University of Chemical Technology, Beijing, China","Compared to most popular single-atom catalysts (SACs), the dual-atom catalysts may possess better catalytic performance due to the synergistic effect of dual-atom sites. However, revealing the synergistic mechanism of dual-atom sites to improve catalytic activity is still insufficient. Here, atomically dispersed FeCu-NC catalyst containing FeN<inf>4</inf> and CuN<inf>4</inf> dual active sites is synthesized, and has been identified by high angle annular dark-field STEM and X-ray absorption spectroscopy. The as-synthesized FeCu-NC exhibits a half-wave potential of 0.882 V, which is nearly 40 mV superior to Pt/C catalyst and 24 mV better than Fe-NC SAC in alkaline medium. Using FeCu-NC as a cathode catalyst, the assembled hydroxide exchange membrane fuel cell presents a peak power density of 0.91 W·cm−2, which is ∼ 21% higher than of Fe-NC based one (0.76 W·cm−2). DFT calculations reveal that the strain effect caused by the CuN<inf>4</inf> species replacing the neighbor carbon environment of the FeN<inf>4</inf> species, can efficiently tailor the electronic structure and reduce the OH* adsorption on FeN<inf>4</inf> species and therefore improves the catalytic activity and kinetic process of ORR. This work provides a new insight into the synergistic catalysis of dual-atom sites for ORR. © 2022 Elsevier B.V.",Dual-atom catalysts; Fuel cells; Oxygen reduction reaction; Synergistic catalysis,Binary alloys; Catalysis; Catalyst activity; Electrolytic reduction; Electronic structure; Hydrogen; Oxygen; Proton exchange membrane fuel cells (PEMFC); X ray absorption spectroscopy; Catalytic performance; Dual sites; Dual-atom catalyst; Hydrogen fuel cells; Oxygen Reduction; Oxygen reduction reaction; Single-atoms; Synergistic catalysis; Synthesised; ]+ catalyst; Atoms,Dual-atom catalysts;Fuel cells;Oxygen reduction reaction;Synergistic catalysis;Binary alloys;Catalysis;Catalyst activity;Electrolytic reduction;Electronic structure;Hydrogen;Oxygen;Proton exchange membrane fuel cells (PEMFC);X ray absorption spectroscopy;Catalytic performance;Dual sites;Dual-atom catalyst;Hydrogen fuel cells;Oxygen Reduction;Single-atoms;Synthesised;]+ catalyst;Atoms,"S. Wang; State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China; email: stwang@buct.edu.cn",,,,,,Elsevier B.V.,13858947,,CMEJA,,English,Chem. Eng. J.,Article,Scopus,,2-s2.0-85131058930,,China,buct.edu.cn,,,"Xiao, Z.; Sun, P.; Qiao, Z.; Qiao, K.; Xu, H.; Wang, S.; Cao, D."
"Lu, X., Li, Y., Yang, P., Wan, Y., Wang, D., Xu, H., Liu, L., Xiao, L., Li, R., Wang, G., Zhang, J., An, M., Wu, G.",Atomically dispersed Fe-N-C catalyst with densely exposed Fe-N4 active sites for enhanced oxygen reduction reaction,2024,Chemical Engineering Journal,485,,149529,,,,48,10.1016/j.cej.2024.149529,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85185838602&doi=10.1016%2Fj.cej.2024.149529&partnerID=40&md5=0abb4fadd015569c4b02802d2e8b167f,"MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China; Microsystem & Terahertz Research Center, China Academy of Engineering Physics, Mianyang, Sichuan, China; School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, China; College of Environmental and Chemical Engineering, Heilongjiang University of Science and Technology, Harbin, Heilongjiang, China; School of Electronic and Information Engineering, Yangtze Normal University, Chongqing, Sichuan, China; School of Engineering and Applied Sciences, Buffalo, NY, United States","Lu, Xiangyu, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China; Li, Yaqiang, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China; Yang, Peixia, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China; Wan, Yongbiao, Microsystem & Terahertz Research Center, China Academy of Engineering Physics, Mianyang, Sichuan, China; Wang, Dan, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, China; Xu, Hao, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China; Liu, Lilai, College of Environmental and Chemical Engineering, Heilongjiang University of Science and Technology, Harbin, Heilongjiang, China; Xiao, Lihui, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China; Li, Ruopeng, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China; Wang, Guangzhao, School of Electronic and Information Engineering, Yangtze Normal University, Chongqing, Sichuan, China; Zhang, Jinqiu, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China; An, Maozhong, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China; Wu, Gang, School of Engineering and Applied Sciences, Buffalo, NY, United States","Atomically dispersed Fe-N-C catalysts are a promising alternative to platinum group metal (PGM) catalysts for oxygen reduction reaction (ORR). However, attaining efficient ORR activity and superior stability in Fe-N-C catalysts is still crucial yet challenging. Herein, we report a rational SiO<inf>2</inf>-mediated two-step pyrolysis strategy for stabilizing densely exposed Fe-N<inf>4</inf> active sites on hierarchically porous carbon (HP-Fe-N-C/2). Benefiting from the high density of accessible Fe-N<inf>4</inf> sites and the high graphitization degree of carbon support, the obtained HP-Fe-N-C/2 catalyst demonstrates outstanding activity and stability for ORR in both alkaline and acidic media. When used as the cathode catalyst, the assembled Zn-air battery shows a high peak power density of 217 mW cm−2 and ultra-long cycling stability for 1342 h without noticeable degradation. As a PGM-free cathode in proton exchange membrane fuel cells, it delivers a maximum output power density of 0.66 W cm−2. © 2024 Elsevier B.V.",Densely exposed Fe-N4 sites; Fe-N-C catalysts; Oxygen reduction reaction; Stability; Zn-air battery,Carbon; Catalyst activity; Cathodes; Electrolytic reduction; Iron compounds; Oxygen; Porous materials; Proton exchange membrane fuel cells (PEMFC); Stability; Zinc air batteries; Zinc compounds; Active site; Densely exposed fe-N4 site; Fe-N-C catalyst; Hierarchically porous carbons; Metal catalyst; Oxygen reduction reaction; Platinum group metals; Reaction activity; Two-step pyrolysis; ]+ catalyst; Silica,Densely exposed Fe-N4 sites;Fe-N-C catalysts;Oxygen reduction reaction;Stability;Zn-air battery;Carbon;Catalyst activity;Cathodes;Electrolytic reduction;Iron compounds;Oxygen;Porous materials;Proton exchange membrane fuel cells (PEMFC);Zinc air batteries;Zinc compounds;Active site;Densely exposed fe-N4 site;Fe-N-C catalyst;Hierarchically porous carbons;Metal catalyst;Platinum group metals;Reaction activity;Two-step pyrolysis;]+ catalyst;Silica,"P. Yang; MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China; email: yangpeixia@hit.edu.cn",,,,,,Elsevier B.V.,13858947,,CMEJA,,English,Chem. Eng. J.,Article,Scopus,,2-s2.0-85185838602,,China;United States,hit.edu.cn,,,"Lu, X.; Li, Y.; Yang, P.; Wan, Y.; Wang, D.; Xu, H.; Liu, L.; Xiao, L.; Li, R.; Wang, G.; Zhang, J.; An, M.; Wu, G."
"Ao, X., Zhang, W., Zhao, B., Ding, Y., Nam, G., Soule, L., Abdelhafiz, A., Wang, C., Liu, M.",Atomically dispersed Fe-N-C decorated with Pt-alloy core-shell nanoparticles for improved activity and durability towards oxygen reduction,2020,Energy and Environmental Science,13,9,,3032,3040,,301,10.1039/d0ee00832j,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85095135295&doi=10.1039%2Fd0ee00832j&partnerID=40&md5=10dbc99e6f5467dd17a99d838d5618d3,"College of Engineering, Atlanta, GA, United States; School of Optical and Electronic Information, Wuhan National Laboratory for Optoelectronics, Wuhan, Hubei, China; Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, China","Ao, Xiang, College of Engineering, Atlanta, GA, United States, School of Optical and Electronic Information, Wuhan National Laboratory for Optoelectronics, Wuhan, Hubei, China; Zhang, Wei, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, China; Zhao, Bote, College of Engineering, Atlanta, GA, United States; Ding, Yong, College of Engineering, Atlanta, GA, United States; Nam, Gyutae, College of Engineering, Atlanta, GA, United States; Soule, Luke, College of Engineering, Atlanta, GA, United States; Abdelhafiz, Ali Ahmed, College of Engineering, Atlanta, GA, United States; Wang, Chundong, School of Optical and Electronic Information, Wuhan National Laboratory for Optoelectronics, Wuhan, Hubei, China; Liu, Meilin, College of Engineering, Atlanta, GA, United States","One of the key challenges that hinders broad commercialization of proton exchange membrane fuel cells is the high cost and inadequate performance of the catalysts for the oxygen reduction reaction (ORR). Here we report a composite ORR catalyst consisting of ordered intermetallic Pt-alloy nanoparticles attached to an N-doped carbon substrate with atomically dispersed Fe-N-C sites, demonstrating substantially enhanced catalytic activity and durability, achieving a half-wave potential of 0.923 V (vs. RHE) and negligible activity loss after 5000 cycles of an accelerated durability test. The composite catalyst is prepared by deposition of Pt nanoparticles on an N-doped carbon substrate with atomically dispersed Fe-N-C sites derived from a metal-organic framework and subsequent thermal treatment. The latter results in the formation of core-shell structured Pt-alloy nanoparticles with ordered intermetallic Pt3M (M = Fe and Zn) as the core and Pt atoms on the shell surface, which is beneficial to both the ORR activity and stability. The presence of Fe in the porous Fe-N-C substrate not only provides more active sites for the ORR but also effectively enhances the durability of the composite catalyst. The observed enhancement in performance is attributed mainly to the unique structure of the composite catalyst, as confirmed by experimental measurements and computational analyses. Furthermore, a fuel cell constructed using the as-developed ORR catalyst demonstrates a peak power density of 1.31 W cm-2. The strategy developed in this work is applicable to the development of composite catalysts for other electrocatalytic reactions. This journal is © The Royal Society of Chemistry.",,Catalyst activity; Composite structures; Core shell nanoparticles; Doping (additives); Durability; Electrocatalysis; Electrolytic reduction; Intermetallics; Iron; Metal nanoparticles; Metal-Organic Frameworks; Organometallics; Oxygen; Oxygen reduction reaction; Platinum metals; Proton exchange membrane fuel cells (PEMFC); Shells (structures); Accelerated durability tests; Composite catalysts; Computational analysis; Electrocatalytic reactions; Enhanced catalytic activity; Half-wave potential; Improved activities; Peak power densities; Platinum alloys; alloy; carbon; iron ore; nanoparticle; nickel; oxygen; platinum; reduction,Catalyst activity;Composite structures;Core shell nanoparticles;Doping (additives);Durability;Electrocatalysis;Electrolytic reduction;Intermetallics;Iron;Metal nanoparticles;Metal-Organic Frameworks;Organometallics;Oxygen;Oxygen reduction reaction;Platinum metals;Proton exchange membrane fuel cells (PEMFC);Shells (structures);Accelerated durability tests;Composite catalysts;Computational analysis;Electrocatalytic reactions;Enhanced catalytic activity;Half-wave potential;Improved activities;Peak power densities;Platinum alloys;alloy;carbon;iron ore;nanoparticle;nickel;platinum;reduction,"B. Zhao; School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, 30332, United States; email: bote.zhao@mse.gatech.edu; M. Liu; School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, 30332, United States; email: meilin.liu@mse.gatech.edu; C. Wang; Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, China; email: apcdwang@hust.edu.cn",,,,,,Royal Society of Chemistry,17545692,,,,English,Energy Environ. Sci.,Article,Scopus,,2-s2.0-85095135295,,United States;China,mse.gatech.edu,,,"Ao, X.; Zhang, W.; Zhao, B.; Ding, Y.; Nam, G.; Soule, L.; Abdelhafiz, A.; Wang, C.; Liu, M."
"Miao, Z., Wang, X., Tsai, M.C., Jin, Q., Liang, J., Ma, F., Wang, T., Zheng, S., Hwang, B.J., Huang, Y., Guo, S., Li, Q.",Atomically Dispersed Fe-Nx/C Electrocatalyst Boosts Oxygen Catalysis via a New Metal-Organic Polymer Supramolecule Strategy,2018,Advanced Energy Materials,8,24,1801226,,,,240,10.1002/aenm.201801226,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85050827926&doi=10.1002%2Faenm.201801226&partnerID=40&md5=32b91846352beaeb688bc47a726461b7,"School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Institute of Metal Research Chinese Academy of Sciences, Shenyang, Liaoning, China; College of Environmental Sciences and Engineering and BIC-ESAT, Peking University, Beijing, China","Miao, Zhengpei, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China; Wang, Xiaoming, Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Tsai, Meng−Che, Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Jin, Qianqian, Institute of Metal Research Chinese Academy of Sciences, Shenyang, Liaoning, China; Liang, Jiashun, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China; Ma, Feng, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China; Wang, Tanyuan, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China; Zheng, Shijian, Institute of Metal Research Chinese Academy of Sciences, Shenyang, Liaoning, China; Hwang, Bing Joe, Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Huang, Yunhui, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China; Guo, Shaojun, College of Environmental Sciences and Engineering and BIC-ESAT, Peking University, Beijing, China; Li, Qing, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China","The development of high-performance oxygen reduction reaction (ORR) catalysts derived from non-Pt group metals (non-PGMs) is urgent for the wide applications of proton exchange membrane fuel cells (PEMFCs). In this work, a facile and cost-efficient supramolecular route is developed for making non-PGM ORR catalyst with atomically dispersed Fe-N<inf>x</inf>/C sites through pyrolyzing the metal-organic polymer coordinative hydrogel formed between Fe3+ and α-L-guluronate blocks of sodium alginate (SA). High-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) and X-ray absorption spectroscopy (XAS) verify that Fe atoms achieve atomic-level dispersion on the obtained SA-Fe-N nanosheets and a possible fourfold coordination with N atoms. The best-performing SA-Fe-N catalyst exhibits excellent ORR activity with half-wave potential (E<inf>1/2</inf>) of 0.812 and 0.910 V versus the reversible hydrogen electrode (RHE) in 0.5 m H<inf>2</inf>SO<inf>4</inf> and 0.1 m KOH, respectively, along with respectable durability. Such performance surpasses that of most reported non-PGM ORR catalysts. Density functional theory calculations suggest that the relieved passivation effect of OH* on Fe-N<inf>4</inf>/C structure leads to its superior ORR activity to Pt/C in alkaline solution. The work demonstrates a novel strategy for developing high-performance non-PGM ORR electrocatalysts with atomically dispersed and stable M-N<inf>x</inf> coordination sites in both acidic and alkaline media. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",electrocatalysis; energy conversion; fuel cells; oxygen reduction reaction; single atom catalyst,Atoms; Catalysis; Catalyst activity; Density functional theory; Electrocatalysis; Electrocatalysts; Electrolytic reduction; Energy conversion; Fuel cells; High resolution transmission electron microscopy; Hydrogels; Organometallics; Oxygen; Potassium hydroxide; Scanning electron microscopy; Sodium alginate; Transmission electron microscopy; X ray absorption spectroscopy; Fourfold coordination; High-angle annular dark fields; Metal-organic polymers; ORR electrocatalysts; Oxygen reduction reaction; Proton exchange membrane fuel cell (PEMFCs); Reversible hydrogen electrodes; Single atoms; Proton exchange membrane fuel cells (PEMFC),electrocatalysis;energy conversion;fuel cells;oxygen reduction reaction;single atom catalyst;Atoms;Catalysis;Catalyst activity;Density functional theory;Electrocatalysts;Electrolytic reduction;High resolution transmission electron microscopy;Hydrogels;Organometallics;Oxygen;Potassium hydroxide;Scanning electron microscopy;Sodium alginate;Transmission electron microscopy;X ray absorption spectroscopy;Fourfold coordination;High-angle annular dark fields;Metal-organic polymers;ORR electrocatalysts;Proton exchange membrane fuel cell (PEMFCs);Reversible hydrogen electrodes;Single atoms;Proton exchange membrane fuel cells (PEMFC),"S. Guo; Department of Materials Science and Engineering, and BIC-ESAT, College of Engineering, Peking University, 100871, China; email: guosj@pku.edu.cn",,,,,,Wiley-VCH Verlag info@wiley-vch.de,16146832,,,,English,Adv. Energy Mater.,Article,Scopus,,2-s2.0-85050827926,,China;Taiwan,pku.edu.cn,,,"Miao, Z.; Wang, X.; Tsai, M.-C.; Jin, Q.; Liang, J.; Ma, F.; Wang, T.; Zheng, S.; Hwang, B.-J.; Huang, Y.; Guo, S.; Li, Q."
"Zhang, H.G., Ding, S., Hwang, S., Zhao, X.L., Su, D., Xu, H., Yang, H.P., Wu, G.",Atomically Dispersed Iron Cathode Catalysts Derived from Binary Ligand-Based Zeolitic Imidazolate Frameworks with Enhanced Stability for PEM Fuel Cells,2019,JOURNAL OF THE ELECTROCHEMICAL SOCIETY,166,7,,F3116,F3122,7,32,10.1149/2.0141907jes,,"[Zhang, Hanguang; Ding, Shuo; Zhao, Xiaolin; Wu, Gang] SUNY Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA; [Ding, Shuo; Xu, Hui] Giner Inc, Newton, MA 02466 USA; [Hwang, Sooyeon; Su, Dong] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA; [Zhao, Xiaolin; Yang, Haipeng] Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen 518060, Peoples R China",,"Iron-nitrogen-carbon (Fe-N-C) catalysts for oxygen reduction reaction (ORR) have exhibited a great promise to replace current platinum-based catalysts for proton exchange membrane fuel cells (PEMFCs). However, insufficient stability is the major hurdle to prohibit their practical applications. Here, we report a binary ligand strategy to synthesize Fe-doped zeolitic imidazolate framework-8 (ZIF-8) catalyst precursors through combining traditional 2-methyimidazole (mIm) and the secondary imidazolate or triazole-containing ligands. Compared to triazole-based secondary ligands, imidazolate-based ones are able to retain the shape and size of crystal particles from precursors to catalysts during thermal activation, providing great feasibility to control catalyst morphologies. Among studied ligands, integrating 2-undecylimidazole (uIm) as the secondary ligand with mIm enabled atomically dispersed Fe-N-C catalysts with high ORR activity and obviously enhanced durability in acidic electrolytes. Unlike single mIm precursor, using the mIm-uIm binary ligand synthesis, increasing Fe doping content does not result in the formation of Fe-rich aggregates. The unique hollow carbon particle morphology observed with the mIm-uIm derived catalyst leads to increased surface area allowing to accommodate more atomic FeN4 active sites. The increased order of carbon structure in the mIm-uIm derived catalyst is likely beneficial for enhancement of catalyst stability. (c) The Author(s) 2019. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited.",,METAL-ORGANIC FRAMEWORK; OXYGEN-REDUCTION REACTION; DOPED CARBON; EFFICIENT OXYGEN; FE; ELECTROCATALYSTS; PERFORMANCE; ZIF-8; MORPHOLOGY; ALKALINE,METAL-ORGANIC FRAMEWORK;OXYGEN-REDUCTION REACTION;DOPED CARBON;EFFICIENT OXYGEN;FE;ELECTROCATALYSTS;PERFORMANCE;ZIF-8;MORPHOLOGY;ALKALINE,hxu@ginerinc.com; yanghp@szu.edu.cn; gangwu@buffalo.edu,,"65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA",,,,ELECTROCHEMICAL SOC INC,0013-4651,,,,English,J ELECTROCHEM SOC,Article,WoS,Electrochemistry; Materials Science,WOS:000464100100001,2-s2.0-85072910393,United States;China,ginerinc.com,SUNY Buffalo;Giner Inc;Brookhaven Natl Lab;Shenzhen Univ,"SUNY Buffalo, United States;Giner Inc, United States;Brookhaven Natl Lab, United States;Shenzhen Univ, China","Zhang, Hanguang; Ding, Shuo; Hwang, Sooyeon; Zhao, Xiaolin; Su, Dong; Xu, Hui; Yang, Haipeng; Wu, Gang"
"Muthurasu, A., Balaji, R., Ko, T.H., Kim, T.W., Rosyara, Y.R., Kim, N.D., Radhakrishnan, S., Kim, H.Y.",Atomically Dispersed Iron on Functionalized Boron Nitride Nanosheets for Efficient Oxygen Reduction in Proton Exchange Membrane Fuel Cells,2025,ACS CATALYSIS,15,22,,18987,18994,8,0,10.1021/acscatal.5c06792,,"[Muthurasu, Alagan; Ko, Tae Hoon; Kim, Tae Woo; Raj Rosyara, Yagya; Kim, Hak Yong] Jeonbuk Natl Univ, Dept Organ Mat & Fiber Engn, Jeonju 561756, South Korea; [Balaji, Ravichandran; Kim, Nam Dong; Kim, Hak Yong] Korea Inst Sci & Technol KIST, Funct Composite Mat Res Ctr, Seoul 55324, Jeollabuk Do, South Korea; [Radhakrishnan, Sivaprakasam] SR Univ, Sch Sci & Humanities, Dept Chem, Warangal 506371, Telangana, India",,"Iron single-atom (Fe-SA) catalysts are promising alternatives to platinum for proton-exchange membrane fuel cells (PEMFCs), but their high performance often lacks long-term stability during operation. Designing a unique Fe coordination environment beyond the traditional Fe-N4 structure in Fe-N-C catalysts could overcome current stability limitations of Pt-free catalysts, though this remains unexplored. Herein, iron single-atom catalysts embedded in carbon mesopores and integrated with hydroxylated boron nitride nanosheets (OH-BN/C/Fe-SA) exhibit enhanced oxygen reduction reaction (ORR) activity. The distinctive Fe coordination in OH-BN/C/Fe-SA markedly enhances 4e- ORR activity and selectivity, reducing H2O2 production to below 1% compared to the Fe-SA catalyst. The OH-BN/C/Fe-SA catalyst shows high cyclic stability, with less than 5 mV drop in half-wave potential (E 1/2) after long cycles, making it the most stable Pt-free catalyst reported for PEMFCs. The 2D coordination structure effectively prevents demetalation of the OH-BN/C/Fe-SA catalyst, ensuring long-term stability and improved PEMFC durability. Our study lays the foundation for next-generation Pt-free catalysts for PEMFCs.",Fuel Cell; nanosheets; single atom; proton-exchange membrane; and catalysts,ELECTROCATALYST; GOLD,Fuel Cell;nanosheets;single atom;proton-exchange membrane;and catalysts;ELECTROCATALYST;GOLD,s.radhakrishnan@sru.edu.in; khy@jbnu.ac.kr,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2155-5435,,,,English,ACS CATAL,Article,WoS,Chemistry,WOS:001605893200001,2-s2.0-105020414735,South Korea;India,sru.edu.in,Jeonbuk Natl Univ;Korea Inst Sci & Technol KIST;SR Univ,"Jeonbuk Natl Univ, South Korea;Korea Inst Sci & Technol KIST, South Korea;SR Univ, India","Muthurasu, Alagan; Balaji, Ravichandran; Ko, Tae Hoon; Kim, Tae Woo; Raj Rosyara, Yagya; Kim, Nam Dong; Radhakrishnan, Sivaprakasam; Kim, Hak Yong"
"Liu, S.W., Li, C.Z., Zachman, M.J., Zeng, Y.C., Yu, H.R., Li, B.Y., Wang, M.Y., Braaten, J., Liu, J.W., Meyer, H.M., Lucero, M., Kropf, A.J., Alp, E.E., Gong, Q., Shi, Q.R., Feng, Z.X., Xu, H., Wang, G.F., Myers, D.J., Xie, J., Cullen, D.A., Litster, S., Wu, G.",Atomically dispersed iron sites with a nitrogen-carbon coating as highly active and durable oxygen reduction catalysts for fuel cells,2022,NATURE ENERGY,7,7,,652,663,12,580,10.1038/s41560-022-01062-1,,"[Liu, Shengwen; Zeng, Yachao; Shi, Qiurong; Wu, Gang] Univ Buffalo State Univ New York, Dept Chem & Biol Engn, Buffalo, NY 14260 USA; [Li, Chenzhao; Gong, Qing; Xie, Jian] Indiana Univ Purdue Univ, Dept Mech & Energy Engn, Purdue Sch Engn & Technol, Indianapolis, IN 46202 USA; [Li, Chenzhao] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA; [Zachman, Michael J.; Yu, Haoran; Cullen, David A.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37830 USA; [Li, Boyang; Wang, Guofeng] Univ Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15260 USA; [Wang, Maoyu; Lucero, Marcos; Feng, Zhenxing] Oregon State Univ, Sch Chem Biol & Environm Engn, Corvallis, OR 97331 USA; [Braaten, Jonathan; Liu, Jiawei; Litster, Shawn] Carnegie Mellon Univ, Dept Mech Engn, Pittsburgh, PA 15213 USA; [Meyer, Harry M.] Oak Ridge Natl Lab, Chem Sci Div, Oak Ridge, TN USA; [Kropf, A. Jeremy; Myers, Deborah J.] Argonne Natl Lab, Chem Sci & Engn Div, Lemont, IL 60439 USA; [Alp, E. Ercan] Argonne Natl Lab, Adv Photon Source, Lemont, IL USA; [Xu, Hui] Giner Inc, Newton, MA USA",,"Fe-N-C materials are promising oxygen reduction catalysts for proton-exchange membrane fuel cells but still lack sufficient long-term durability for practical applications. Here the authors fabricate an Fe-N-C material with a thin N-C layer on the surface, leading to a highly durable and active catalyst. Nitrogen-coordinated single atom iron sites (FeN4) embedded in carbon (Fe-N-C) are the most active platinum group metal-free oxygen reduction catalysts for proton-exchange membrane fuel cells. However, current Fe-N-C catalysts lack sufficient long-term durability and are not yet viable for practical applications. Here we report a highly durable and active Fe-N-C catalyst synthesized using heat treatment with ammonia chloride followed by high-temperature deposition of a thin layer of nitrogen-doped carbon on the catalyst surface. We propose that catalyst stability is improved by converting defect-rich pyrrolic N-coordinated FeN4 sites into highly stable pyridinic N-coordinated FeN4 sites. The stability enhancement is demonstrated in membrane electrode assemblies using accelerated stress testing and a long-term steady-state test (>300 h at 0.67 V), approaching a typical Pt/C cathode (0.1 mg(Pt) cm(-2)). The encouraging stability improvement represents a critical step in developing viable Fe-N-C catalysts to overcome the cost barriers of hydrogen fuel cells for numerous applications.",,EXCHANGE; ELECTROCATALYSTS; PERFORMANCE; STABILITY; POINTS; DESIGN,EXCHANGE;ELECTROCATALYSTS;PERFORMANCE;STABILITY;POINTS;DESIGN,guw8@pitt.edu; dmyers@anl.gov; jianxie@iupui.edu; cullenda@ornl.gov; litster@andrew.cmu.edu; gangwu@buffalo.edu,,"HEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY",,,,NATURE PORTFOLIO,2058-7546,,,,English,NAT ENERGY,Article,WoS,Energy & Fuels; Materials Science,WOS:000824923700001,2-s2.0-85133640667,United States,pitt.edu,Univ Buffalo State Univ New York;Indiana Univ Purdue Univ;Purdue Univ;Oak Ridge Natl Lab;Univ Pittsburgh;Oregon State Univ;Carnegie Mellon Univ;Argonne Natl Lab;Giner Inc,"Univ Buffalo State Univ New York, United States;Indiana Univ Purdue Univ, United States;Purdue Univ, United States;Oak Ridge Natl Lab, United States;Univ Pittsburgh, United States;Oregon State Univ, United States;Carnegie Mellon Univ, United States;Argonne Natl Lab, United States;Giner Inc, United States","Liu, Shengwen; Li, Chenzhao; Zachman, Michael J.; Zeng, Yachao; Yu, Haoran; Li, Boyang; Wang, Maoyu; Braaten, Jonathan; Liu, Jiawei; Meyer, Harry M.; Lucero, Marcos; Kropf, A. Jeremy; Alp, E. Ercan; Gong, Qing; Shi, Qiurong; Feng, Zhenxing; Xu, Hui; Wang, Guofeng; Myers, Deborah J.; Xie, Jian; Cullen, David A.; Litster, Shawn; Wu, Gang"
"Yang, B.L., Yu, H.F., Jia, X.D., Cheng, Q., Ren, Y.L., He, B., Xiang, Z.H.",Atomically Dispersed Isolated Fe-Ce Dual-Metal-Site Catalysts for Proton-Exchange Membrane Fuel Cells,2023,ACS APPLIED MATERIALS & INTERFACES,15,19,,23316,23327,12,35,10.1021/acsami.3c03203,,"[Yang, Bolong; Yu, Haifeng; Jia, Xudong; Cheng, Qian; Xiang, Zhonghua] Beijing Univ Chem Technol, State Key Lab Inorgan Composites, Beijing 100029, Peoples R China; [Ren, Yaoliang; He, Bing] Shaoxing Univ, Dept Chem & Chem Engn, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Zhejiang, Peoples R China",,"Atomically dispersed single-metal-site catalysts are hailed as the most promising category for the oxygen reduction reaction (ORR) with full metal utilization and complete exploitation of intrinsic activity. However, due to the inherent electronic structure of single-metal atoms in MNx, it is difficult to break the linear relationship between catalytic activity and adsorption energy of reaction intermediates, and the performance of such catalysts still falls short of expectations. Herein, we change the adsorption structure by constructing Fe-Ce atomic pairs to modulate the iron d-orbital electron configuration, breaking the linear relationship based on single-metal sites. The 4f cruise electrons of cerium element reduce the d orbital center of iron in the synthesized FeCe-single atom dispersed hierarchical porous nitrogen-doped carbon (FeCe-SAD/HPNC) catalyst, and more orbital occupied states appear near the fermi level, which weakens the adsorption strength in the active center and oxygen species, so that the rate-determining step was shifted from *OH desorption to *O > *OH, rendering the excellent ORR performances of the FeCe-SAD/HPNC catalyst. The synthesized FeCe-SAD/HPNC catalyst shows excellent activity, with a half-wave potential as high as 0.81 V for ORR in 0.1 M HClO4 solution. Additionally, by constructing a three-phase reaction interface with a hierarchical porous structure, the H2-O2 proton-exchange membrane fuel cell (PEMFC) assembled with FeCe-SAD/HPNC as cathode catalyst achieves a maximum power density of 0.771 W cm-2 and good stability.",Fe-Ce dual-metal-site catalysts; single atom catalysts; acidic oxygen reduction reaction; proton-exchange membrane fuel cells; hierarchical porous structure,OXYGEN REDUCTION REACTION; EFFICIENT; ELECTROCATALYSTS; CARBON; NANOPARTICLES; NITROGEN,Fe-Ce dual-metal-site catalysts;single atom catalysts;acidic oxygen reduction reaction;proton-exchange membrane fuel cells;hierarchical porous structure;OXYGEN REDUCTION REACTION;EFFICIENT;ELECTROCATALYSTS;CARBON;NANOPARTICLES;NITROGEN,hebing@usx.edu.cn; xiangzh@mail.buct.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1944-8244,,,37145771,English,ACS APPL MATER INTER,Article,WoS,Science & Technology - Other Topics; Materials Science,WOS:000985572200001,2-s2.0-85159584070,China,usx.edu.cn,Beijing Univ Chem Technol;Shaoxing Univ,"Beijing Univ Chem Technol, China;Shaoxing Univ, China","Yang, Bolong; Yu, Haifeng; Jia, Xudong; Cheng, Qian; Ren, Yaoliang; He, Bing; Xiang, Zhonghua"
"Li, J.Z., Chen, M.J., Cullen, D.A., Hwang, S., Wang, M.Y., Li, B.Y., Liu, K.X., Karakalos, S., Lucero, M., Zhang, H.G., Lei, C., Xu, H., Sterbinsky, G.E., Feng, Z.X., Su, D., More, K.L., Wang, G.F., Wang, Z.B., Wu, G.",Atomically dispersed manganese catalysts for oxygen reduction in proton-exchange membrane fuel cells,2018,NATURE CATALYSIS,1,12,,935,945,11,1369,10.1038/s41929-018-0164-8,,"[Li, Jiazhan; Wang, Zhenbo] Harbin Inst Technol, Sch Chem & Chem Engn, MIIT Key Lab Crit Mat Technol New Energy Convers, Harbin, Heilongjiang, Peoples R China; [Li, Jiazhan; Chen, Mengjie; Zhang, Hanguang; Wu, Gang] SUNY Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA; [Cullen, David A.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN USA; [Hwang, Sooyeon; Su, Dong] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA; [Wang, Maoyu; Lucero, Marcos; Feng, Zhenxing] Oregon State Univ, Sch Chem Biol & Environm Engn, Corvallis, OR 97331 USA; [Li, Boyang; Liu, Kexi; Wang, Guofeng] Univ Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA USA; [Karakalos, Stavros] Univ South Carolina, Dept Chem Engn, Columbia, SC 29208 USA; [Lei, Chao; Xu, Hui] Giner Inc, Newton, MA USA; [Sterbinsky, George E.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA; [More, Karren L.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN USA",,"Platinum group metal (PGM)-free catalysts that are also iron free are highly desirable for the oxygen reduction reaction (ORR) in proton-exchange membrane fuel cells, as they avoid possible Fenton reactions. Here we report an efficient ORR catalyst that consists of atomically dispersed nitrogen-coordinated single Mn sites on partially graphitic carbon (Mn-N-C). Evidence for the embedding of the atomically dispersed MnN4 moieties within the carbon surface-exposed basal planes was established by X-ray absorption spectroscopy and their dispersion was confirmed by aberration-corrected electron microscopy with atomic resolution. The Mn-N-C catalyst exhibited a half-wave potential of 0.80 V versus the reversible hydrogen electrode, approaching that of Fe-N-C catalysts, along with significantly enhanced stability in acidic media. The encouraging performance of the Mn-N-C catalyst as a PGM-free cathode was demonstrated in fuel cell tests. First-principles calculations further support the MnN4 sites as the origin of the ORR activity via a 4e(-) pathway in acidic media.",,NONPRECIOUS METAL-CATALYSTS; FE/N/C CATALYSTS; POROUS CARBON; ACTIVE-SITES; IRON; ELECTROCATALYSTS; POLYANILINE; DURABILITY; STABILITY; MN,NONPRECIOUS METAL-CATALYSTS;FE/N/C CATALYSTS;POROUS CARBON;ACTIVE-SITES;IRON;ELECTROCATALYSTS;POLYANILINE;DURABILITY;STABILITY;MN,wangzhb@hit.edu.cn; gangwu@buffalo.edu,,"MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND",,,,NATURE PUBLISHING GROUP,2520-1158,,,,English,NAT CATAL,Article,WoS,Chemistry,WOS:000452918800010,2-s2.0-85055699589,China;United States,hit.edu.cn,Harbin Inst Technol;SUNY Buffalo;Oak Ridge Natl Lab;Brookhaven Natl Lab;Oregon State Univ;Univ Pittsburgh;Univ South Carolina;Giner Inc;Argonne Natl Lab,"Harbin Inst Technol, China;SUNY Buffalo, United States;Oak Ridge Natl Lab, United States;Brookhaven Natl Lab, United States;Oregon State Univ, United States;Univ Pittsburgh, United States;Univ South Carolina, United States;Giner Inc, United States;Argonne Natl Lab, United States","Li, Jiazhan; Chen, Mengjie; Cullen, David A.; Hwang, Sooyeon; Wang, Maoyu; Li, Boyang; Liu, Kexi; Karakalos, Stavros; Lucero, Marcos; Zhang, Hanguang; Lei, Chao; Xu, Hui; Sterbinsky, George E.; Feng, Zhenxing; Su, Dong; More, Karren L.; Wang, Guofeng; Wang, Zhenbo; Wu, Gang"
"Chen, M.J., He, Y.H., Spendelow, J.S., Wu, G.",Atomically Dispersed Metal Catalysts for Oxygen Reduction,2019,ACS ENERGY LETTERS,4,7,,1619,1633,29,296,10.1021/acsenergylett.9b00804,,"[Chen, Mengjie; He, Yanghua; Wu, Gang] SUNY Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA; [Spendelow, Jacob S.] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA",,"The unprecedented oxygen reduction reaction (ORR) activity of atomically dispersed and nitrogen coordinated metal site (e.g., Fe, Co, or Mn) catalysts makes them promising low-cost candidates to replace platinum group metal (PGM) catalysts in proton exchange membrane fuel cells (PEMFCs). This Perspective focuses on emerging developments in mechanistic understanding, innovative synthetic concept, and performance improvement of these high-risk, high-reward PGM-free catalysts. Starting from theoretical and computational analysis of active sites and ORR pathways, we provide a concise overview of recent progress in catalyst synthesis, characterization, and catalytic performance with an aim to elucidate structure property correlations. We also examine remaining challenges and future directions to realize atomically dispersed metal catalysts with sufficient activity and stability for viable PEMFC applications.",,N-C CATALYSTS; DENSITY-FUNCTIONAL THEORY; ACTIVE-SITES; FE/N/C-CATALYSTS; FUEL-CELLS; ORGANIC FRAMEWORKS; CATHODE CATALYSTS; TRANSITION-METAL; DOPED CARBON; FE,N-C CATALYSTS;DENSITY-FUNCTIONAL THEORY;ACTIVE-SITES;FE/N/C-CATALYSTS;FUEL-CELLS;ORGANIC FRAMEWORKS;CATHODE CATALYSTS;TRANSITION-METAL;DOPED CARBON;FE,spendelow@lanl.gov; gangwu@buffalo.edu,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2380-8195,,,,English,ACS ENERGY LETT,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Science & Technology - Other Topics; Materials Science,WOS:000475827900017,,United States,lanl.gov,SUNY Buffalo;Los Alamos Natl Lab,"SUNY Buffalo, United States;Los Alamos Natl Lab, United States","Chen, Mengjie; He, Yanghua; Spendelow, Jacob S.; Wu, Gang"
"Ao, X., Wang, H.R., Zhang, X., Wang, C.D.",Atomically Dispersed Metal-Nitrogen-Carbon Catalysts for Acidic Oxygen Reduction Reaction,2025,ACS APPLIED MATERIALS & INTERFACES,17,2,,2844,2862,19,10,10.1021/acsami.4c16972,,"[Ao, Xiang; Wang, Haoran; Zhang, Xia; Wang, Chundong] Huazhong Univ Sci & Technol, Sch Integrated Circuits, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China; [Ao, Xiang] Univ New South Wales, Sch Chem Engn, Sydney, NSW 2052, Australia",,"Designing efficient and cost-effective electrocatalysts toward oxygen reduction reaction (ORR) under demanding acidic environments plays a critical role in advancing proton exchange membrane fuel cells (PEMFCs). Metal-nitrogen-carbon (M-N-C) catalysts with atomically dispersed metals have gained attention for their affordability, excellent catalytic performance, and distinctive features including consistent active sites and high atomic utilization. Over the past decade, significant achievements have been made in this field. This review offers a comprehensive summary of the latest developments in atomically dispersed M-N-C catalysts for ORR in acidic environments along with their applications in PEMFCs. The ORR mechanisms, PEMFC configuration, and operational principles are presented first, followed by an in-depth discussion of strategies to improve the activity and stability of the PEMFC using atomically dispersed M-N-C catalysts at the cathode. Lastly, this review highlights the unresolved challenges and proposes future research pathways for advancing high-performance atomically dispersed M-N-C catalysts and PEMFCs.",electrocatalysis; oxygen reduction reaction; single-atom catalysts; metal-nitrogen-carboncatalysts; proton exchange membrane fuel cells,PROTON-EXCHANGE MEMBRANE; SINGLE-ATOM CATALYSTS; DOPED CARBON; RATIONAL DESIGN; ACTIVE-SITES; FUEL-CELLS; PERFORMANCE; FE/N/C; ELECTROCATALYSTS; DURABILITY,electrocatalysis;oxygen reduction reaction;single-atom catalysts;metal-nitrogen-carboncatalysts;proton exchange membrane fuel cells;PROTON-EXCHANGE MEMBRANE;DOPED CARBON;RATIONAL DESIGN;ACTIVE-SITES;FUEL-CELLS;PERFORMANCE;FE/N/C;ELECTROCATALYSTS;DURABILITY,apcdwang@hust.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1944-8244,,,39754738,English,ACS APPL MATER INTER,Review,WoS,Science & Technology - Other Topics; Materials Science,WOS:001389994000001,2-s2.0-85216036038,China;Australia,hust.edu.cn,Huazhong Univ Sci & Technol;Univ New South Wales,"Huazhong Univ Sci & Technol, China;Univ New South Wales, Australia","Ao, Xiang; Wang, Haoran; Zhang, Xia; Wang, Chundong"
"He, Y., Liu, S., Priest, C., Shi, Q., Wu, G.","Atomically dispersed metal-nitrogen-carbon catalysts for fuel cells: Advances in catalyst design, electrode performance, and durability improvement",2020,Chemical Society Reviews,49,11,,3484,3524,,657,10.1039/c9cs00903e,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85086284154&doi=10.1039%2Fc9cs00903e&partnerID=40&md5=b02221ffee973b1b7e0fad1c78f7e76d,"School of Engineering and Applied Sciences, Buffalo, NY, United States","He, Yanghua, School of Engineering and Applied Sciences, Buffalo, NY, United States; Liu, Shengwen, School of Engineering and Applied Sciences, Buffalo, NY, United States; Priest, Cameron M., School of Engineering and Applied Sciences, Buffalo, NY, United States; Shi, Qiurong, School of Engineering and Applied Sciences, Buffalo, NY, United States; Wu, Gang, School of Engineering and Applied Sciences, Buffalo, NY, United States","The urgent need to address the high-cost issue of proton-exchange membrane fuel cell (PEMFC) technologies, particularly for transportation applications, drives the development of simultaneously highly active and durable platinum group metal-free (PGM-free) catalysts and electrodes. The past decade has witnessed remarkable progress in exploring PGM-free cathode catalysts for the oxygen reduction reaction (ORR) to overcome sluggish kinetics and catalyst instability in acids. Among others, scientists have identified the newly emerging atomically dispersed transition metal (M: Fe, Co, or/and Mn) and nitrogen co-doped carbon (M-N-C) catalysts as the most promising alternative to PGM catalysts. Here, we provide a comprehensive review of significant breakthroughs, remaining challenges, and perspectives regarding the M-N-C catalysts in terms of catalyst activity, stability, and membrane electrode assembly (MEA) performance. A variety of novel synthetic strategies demonstrated effectiveness in improving intrinsic activity, increasing active site density, and attaining optimal porous structures of catalysts. Rationally designing and engineering the coordination environment of single metal MN<inf>x</inf> sites and their local structures are crucial for enhancing intrinsic activity. Increasing the site density relies on the innovative strategies of restricting the migration and agglomeration of single metal sites into metallic clusters. Relevant understandings provide the correlations among the nature of active sites, nanostructures, and catalytic activity of M-N-C catalysts at the atomic scale through a combination of experimentation and theory. Current knowledge of the transferring catalytic properties of M-N-C catalysts to MEA performance is limited. Rationally designing morphologic features of M-N-C catalysts play a vital role in boosting electrode performance through exposing more accessible active sites, realizing uniform ionomer distribution, and facilitating mass/proton transports. We outline future research directions concerning the comprehensive evaluation of M-N-C catalysts in MEAs. The most considerable challenge of current M-N-C catalysts is the unsatisfied stability and rapid performance degradation in MEAs. Therefore, we further discuss practical methods and strategies to mitigate catalyst and electrode degradation, which is fundamentally essential to make M-N-C catalysts viable in PEMFC technologies. © 2020 The Royal Society of Chemistry.",,Carbon; Electrodes; Electrolytic reduction; Nitrogen; Oxygen reduction reaction; Proton exchange membrane fuel cells (PEMFC); Reaction kinetics; Structural optimization; Transition metals; Comprehensive evaluation; Coordination environment; Durability improvement; Electrode performance; Future research directions; Innovative strategies; Membrane electrode assemblies; Performance degradation; Catalyst activity,Carbon;Electrodes;Electrolytic reduction;Nitrogen;Oxygen reduction reaction;Proton exchange membrane fuel cells (PEMFC);Reaction kinetics;Structural optimization;Transition metals;Comprehensive evaluation;Coordination environment;Durability improvement;Electrode performance;Future research directions;Innovative strategies;Membrane electrode assemblies;Performance degradation;Catalyst activity,"Q. Shi; Department of Chemical and Biological Engineering, University at Buffalo, State University of New York, Buffalo, 14260, United States; email: qiurongs@buffalo.edu; G. Wu; Department of Chemical and Biological Engineering, University at Buffalo, State University of New York, Buffalo, 14260, United States; email: gangwu@buffalo.edu",,,,,,Royal Society of Chemistry orders@rsc.org,03060012,,CSRVB,32342064,English,Chem. Soc. Rev.,Review,Scopus,,2-s2.0-85086284154,,United States,buffalo.edu,,,"He, Y.; Liu, S.; Priest, C.; Shi, Q.; Wu, G."
"Xu, S., Yin, H., Xue, D., Xia, H., Zhao, S., Yan, W., Mu, S., Zhang, J.N.",Atomically Dispersed Metal-Nitrogen-Carbon Catalysts for Oxygen Reduction Reaction; 应用于氧还原反应的非贵金属原子分散级金属-氮-碳催化剂的设计,2022,Gaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities,43,5,20220028,,,,4,10.7503/cjcu20220028,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85132822507&doi=10.7503%2Fcjcu20220028&partnerID=40&md5=518743fe6b8c7825ceb1a1297a2aecd9,"College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; College of Chemistry, State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Changchun, Jilin, China; Wuhan University of Technology, Wuhan, Hubei, China","Xu, Siran, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Yin, Hengbo, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Xue, Dongping, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Xia, Huicong, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Zhao, Shuyan, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Yan, Wenfu, College of Chemistry, State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Changchun, Jilin, China; Mu, Shichun, Wuhan University of Technology, Wuhan, Hubei, China; Zhang, Jianan, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China","To further accelerate the large-scale development and application of proton exchange membrane fuel cell(PEMFC) energy conversion technology, improving the cost-effectiveness of the catalyst is a prerequisite. Currently, atomically dispersed metal-nitrogen-carbon(M-N-C) catalysts also take tremendous potential in terms of increased active site density, atomic utilization and catalytic activity compared to noble metal-based catalysts such as platinum-based catalysts, and are the most promising candidate of platinum-based catalysts. During the preparation of atomically dispersed M-N-C catalysts, the contribution of the uniform dispersion and the optimal structural system of all active sites are the challenge issues. On this basis, we focused on the preparation of various M-N-C catalysts with favorable atomic dispersion and the effect of chemical environment modulation of atoms in different catalysts on the catalytic sites. Herein, we provide an in-depth discussion on the synthesis and characterization of M-N-C catalysts, reaction mechanism, and density functional theory calculations, focusing on the regulation of the chemical environment of catalytic sites by bimetallic sites, atomic cluster structure and heteroatoms. Finally, the problems of the large-scale application of atomically dispersed M-N-C catalysts and the development directions for further optimization are presented. © 2022, Editorial Department of Chem. J. Chinese Universities. All right reserved.",Atomic cluster structure; Atomic dispersion; Dual-metal sites; Heteroatom; Metal-N-C,Atoms; Catalyst activity; Density functional theory; Dispersions; Platinum; Proton exchange membrane fuel cells (PEMFC); Structural optimization; Atomic cluster structures; Atomic dispersion; Carbon catalysts; Dispersed metals; Dual metals; Dual-metal site; Heteroatoms; Metal sites; Metal-N-C; Nitrogen-carbon; Cost effectiveness,Atomic cluster structure;Atomic dispersion;Dual-metal sites;Heteroatom;Metal-N-C;Atoms;Catalyst activity;Density functional theory;Dispersions;Platinum;Proton exchange membrane fuel cells (PEMFC);Structural optimization;Atomic cluster structures;Carbon catalysts;Dispersed metals;Dual metals;Dual-metal site;Heteroatoms;Metal sites;Nitrogen-carbon;Cost effectiveness,"J. Zhang; College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China; email: zjn@zzu.edu.cn",,,,,,Higher Education Press Limited Company,02510790,,KTHPD,,Chinese,Gaodeng Xuexiao Huaxue Xuebao,Review,Scopus,,2-s2.0-85132822507,,China,zzu.edu.cn,,,"Xu, S.; Yin, H.; Xue, D.; Xia, H.; Zhao, S.; Yan, W.; Mu, S.; Zhang, J.-N."
"Wang, D., Yang, P., Liu, L., Wang, W., Chen, Z.",Atomically dispersed metal-nitrogen-carbon electrocatalysts for oxygen reduction reaction: from synthesis strategies to activity engineering,2022,Materials Today Energy,26,,101017,,,,79,10.1016/j.mtener.2022.101017,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85130525710&doi=10.1016%2Fj.mtener.2022.101017&partnerID=40&md5=6cddaae0c354fba52304a82e29fc00db,"School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, China; School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; College of Environmental and Chemical Engineering, Heilongjiang University of Science and Technology, Harbin, Heilongjiang, China; Analysis and Testing Center, Changzhou University, Changzhou, Jiangsu, China","Wang, Dan, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, China; Yang, Peixia, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Liu, Lilai, College of Environmental and Chemical Engineering, Heilongjiang University of Science and Technology, Harbin, Heilongjiang, China; Wang, Wenchang, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, China, Analysis and Testing Center, Changzhou University, Changzhou, Jiangsu, China; Chen, Zhidong, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, China","Atomically dispersed catalysts show great potential in many energy and catalysis fields due to their maximum atom utilization efficiency, tunable electronic structures, and favorable catalytic performance. In particular, atomically dispersed metal nitrogen-carbon (M-N-C) catalysts deliver outstanding activity and selectivity for the oxygen reduction reaction (ORR). At present, although considerable efforts have been made in this field, the precise regulation of well-defined active structure and the effective improvement of catalytic activity remain two major challenges in the development of highly efficient M-N-C catalysts at the atomic scale. Herein, the effective synthesis strategies for realizing well-defined active dispersion are systematically summarized, which is expected to provide valuable guidance for further study. Then, activity engineering to atomically dispersed M-N-C including improvement of intrinsic activity and active sites density are discussed in detail with an aim to clarify structure-property correlations. Finally, the existing problems and prospects regarding the development of atomically dispersed M-N-C catalysts for ORR are proposed. © 2022 Elsevier Ltd",Atomical dispersion; Catalysts; ORR; PEMFC; Zn-air battery,Carbon; Catalyst activity; Catalyst selectivity; Electrocatalysts; Electrolytic reduction; Electronic structure; Nitrogen; Oxygen; Atomical dispersion; Carbon catalysts; Dispersed metals; Electrocatalyst for oxygen reduction reactions; Energy; Nitrogen-carbon; Oxygen reduction reaction; P.E.M.F.C; Synthesis strategy; ]+ catalyst; Dispersions,Atomical dispersion;Catalysts;ORR;PEMFC;Zn-air battery;Carbon;Catalyst activity;Catalyst selectivity;Electrocatalysts;Electrolytic reduction;Electronic structure;Nitrogen;Oxygen;Carbon catalysts;Dispersed metals;Electrocatalyst for oxygen reduction reactions;Energy;Nitrogen-carbon;Oxygen reduction reaction;P.E.M.F.C;Synthesis strategy;]+ catalyst;Dispersions,"Z. Chen; Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, 213164, China; email: zdchen@cczu.edu.cn",,,,,,Elsevier Ltd,,,,,English,Mater. Today Energy,Review,Scopus,,2-s2.0-85130525710,,China,cczu.edu.cn,,,"Wang, D.; Yang, P.; Liu, L.; Wang, W.; Chen, Z."
"Kong, H., Liu, J., Yue, Y.",Atomically Dispersed M-N-C Catalysts in Proton Exchange Membrane Fuel Cells: Recent Progress and Perspectives,2021,E3S Web of Conferences,308,,01019,,,,0,10.1051/e3sconf/202130801019,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85146909936&doi=10.1051%2Fe3sconf%2F202130801019&partnerID=40&md5=7a5bfe192334c117c2ebac10ea072256,"Department of Chemistry and Material Science, Shandong Agricultural University, Tai'an, Shandong, China; Environmental Science and Engineering, BJTU, Chengde, China; Faculty of Environment and Life, Beijing University of Technology, Beijing, China","Kong, Haoran, Department of Chemistry and Material Science, Shandong Agricultural University, Tai'an, Shandong, China; Liu, Jiarong, Environmental Science and Engineering, BJTU, Chengde, China; Yue, Yu, Faculty of Environment and Life, Beijing University of Technology, Beijing, China","The selection of oxygen reduction reaction (ORR) catalysts plays a key role in enhancing the performance of proton exchange membrane fuel cells (PEMFCs). To optimize the energy conversion technology in PEMFCs and improve the cost-effectiveness of ORR catalysts, atomically dispersed metal-nitrogen-carbon (M-N-C) catalyst is regarded as one of the most promising materials to replace Pt-based catalysts. In this review, we summarize the advantages of atomically dispersed M-N-C catalysts in both physical and chemical properties, including controllable dimensions, ease of accessibility, high surface area and excellent conductivity. Additionally, the unique merits of their cost-effectiveness are also described by a concise comparison with other ORR catalysts. Subsequently, some of its main synthesis methods are based on the most commonly used zeolitic imidazolate framework (ZIF) precursor. Several other precursors involve carbon, nitrogen, and one or more active transition metals (mainly iron or cobalt) are introduced briefly. Although there are a variety of synthesis methods, all these methods are in line with pyrolysis technology. Then, the recent advancements of atomically dispersed M-N-C catalysts related to their development and application of Fe-N-C, Mn-N-C, and Co-N-C catalysts are comprehensively described. Finally, based on some common M-N-C catalysts, many improvement ideas are also proposed. The focus is on how to control the negative reaction in Fe-N-C catalysts, improve the activity of Co-N-C catalysts and Mn-N-C catalysts, and find more suitable transition metal materials to prepare M-N-C catalysts. © 2021 EDP Sciences. All rights reserved.",,,,"H. Kong; Chemistry and Materials Science, Shandong Agricultural University, Jinan, 271001, China; email: 2019211160@sdau.edu.cn; J. Liu; Environmental Science and Engineering, BJTU, Chengde, Hebei province, 067000, China; email: 17723019@bjtu.edu.cn; Y. Yue; Faculty of Environment and Life, Beijing University of Technology, Beijing, 100049, China; email: bjutyy@emails.bjut.edu.cn","Du, W.; Grasso, S.",,"6th International Conference on Materials Science, Energy Technology and Environmental Engineering, MSETEE 2021",Hangzhou,2021-08-13 through 2021-08-15,EDP Sciences,25550403,9782759890163; 9782759890552; 9782759890644,,,English,E3S Web Conf.,Conference paper,Scopus,,2-s2.0-85146909936,,China,sdau.edu.cn,,,"Kong, H.; Liu, J.; Yue, Y."
"Qiao, Z., Wang, C., Li, C., Zeng, Y., Hwang, S., Li, B., Karakalos, S., Park, J.H., Kropf, A.J., Wegener, E.C., Gong, Q., Xu, H., Wang, G., Myers, D.J., Xie, J., Spendelow, J.S., Wu, G.",Atomically dispersed single iron sites for promoting Pt and Pt3Co fuel cell catalysts: Performance and durability improvements,2021,Energy and Environmental Science,14,9,,4948,4960,,277,10.1039/d1ee01675j,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85115853388&doi=10.1039%2Fd1ee01675j&partnerID=40&md5=199f713fbcb385a64b61477d10c6ea9f,"School of Engineering and Applied Sciences, Buffalo, NY, United States; Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; College of Engineering, West Lafayette, IN, United States; Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, United States; Swanson School of Engineering, Pittsburgh, PA, United States; Molinaroli College of Engineering and Computing, Columbia, SC, United States; Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Giner, Incorporated and Giner Electrochemical Systems, LLC, Newtown, MA, United States","Qiao, Zhi, School of Engineering and Applied Sciences, Buffalo, NY, United States; Wang, Chenyu, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Li, Chenzhao, College of Engineering, West Lafayette, IN, United States; Zeng, Yachao, School of Engineering and Applied Sciences, Buffalo, NY, United States; Hwang, Sooyeon, Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, United States; Li, Boyang, Swanson School of Engineering, Pittsburgh, PA, United States; Karakalos, Stavros G., Molinaroli College of Engineering and Computing, Columbia, SC, United States; Park, Jaehyung, Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Kropf, Arthur Jeremy, Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Wegener, Evan C., Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Gong, Qing, College of Engineering, West Lafayette, IN, United States; Xu, Hui, Giner, Incorporated and Giner Electrochemical Systems, LLC, Newtown, MA, United States; Wang, Guofeng, Swanson School of Engineering, Pittsburgh, PA, United States; Myers, Deborah J., Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Xie, Jian, College of Engineering, West Lafayette, IN, United States; Spendelow, Jacob Schatz, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Wu, Gang, School of Engineering and Applied Sciences, Buffalo, NY, United States","Significantly reducing platinum group metal (PGM) loading while improving catalytic performance and durability is critical to accelerating proton-exchange membrane fuel cells (PEMFCs) for transportation. Here we report an effective strategy to boost PGM catalysts through integrating PGM-free atomically-dispersed single metal active sites in the carbon support toward the cathode oxygen reduction reaction (ORR). We achieved uniform and fine Pt nanoparticle (NP) (∼2 nm) dispersion on an already highly ORR-active FeN4 site-rich carbon (FeN4-C). Furthermore, we developed an effective approach to preparing a well-dispersed and highly ordered L12 Pt3Co intermetallic nanoparticle catalyst on the FeN4-C support. DFT calculations predicted a synergistic interaction between Pt clusters and surrounding FeN4 sites through weakening O2 adsorption by 0.15 eV on Pt sites and reducing activation energy to break O-O bonds, thereby enhancing the intrinsic activity of Pt. Experimentally, we verified the synergistic effect between Pt or Pt3Co NPs and FeN4 sites, leading to significantly enhanced ORR activity and stability. Especially in a membrane electrode assembly (MEA) with a low cathode Pt loading (0.1 mgPt cm-2), the Pt/FeN4-C catalyst achieved a mass activity of 0.451 A mgPt-1 and retained 80% of the initial values after 30 000 voltage cycles (0.60 to 0.95 V), exceeding DOE 2020 targets. Furthermore, the Pt3Co/FeN4 catalyst achieved significantly enhanced performance and durability concerning initial mass activity (0.72 A mgPt-1), power density (824 mW cm-2 at 0.67 V), and stability (23 mV loss at 1.0 A cm-2). The approach to exploring the synergy between PGM and PGM-free Fe-N-C catalysts provides a new direction to design advanced catalysts for hydrogen fuel cells and various electrocatalysis processes. © The Royal Society of Chemistry.",,Activation energy; Binary alloys; Carbon; Catalyst activity; Cathodes; Design for testability; Durability; Electrocatalysis; Iron; Iron compounds; Nanocatalysts; Nanoparticles; Platinum; Proton exchange membrane fuel cells (PEMFC); Carbon support; Catalyst performance; Catalysts durability; Durability improvement; Fuel cell catalysts; Mass activity; Metal free; Oxygen reduction reaction; Platinum group metals; ]+ catalyst; Electrolytic reduction; activation energy; catalyst; durability; fuel cell; iron; performance assessment; platinum,Activation energy;Binary alloys;Carbon;Catalyst activity;Cathodes;Design for testability;Durability;Electrocatalysis;Iron;Iron compounds;Nanocatalysts;Nanoparticles;Platinum;Proton exchange membrane fuel cells (PEMFC);Carbon support;Catalyst performance;Catalysts durability;Durability improvement;Fuel cell catalysts;Mass activity;Metal free;Oxygen reduction reaction;Platinum group metals;]+ catalyst;Electrolytic reduction;catalyst;fuel cell;performance assessment,"G. Wu; Department of Chemical and Biological Engineering, University at Buffalo, the State University of New York, Buffalo, 14260, United States; email: gangwu@buffalo.edu",,,,,,Royal Society of Chemistry,17545692,,,,English,Energy Environ. Sci.,Article,Scopus,,2-s2.0-85115853388,,United States,buffalo.edu,,,"Qiao, Z.; Wang, C.; Li, C.; Zeng, Y.; Hwang, S.; Li, B.; Karakalos, S.; Park, J.H.; Kropf, A.J.; Wegener, E.C.; Gong, Q.; Xu, H.; Wang, G.; Myers, D.J.; Xie, J.; Spendelow, J.S.; Wu, G."
"Ma, F., Liu, X., Wang, X., Liang, J., Huang, J., Priest, C., Liu, J., Jiao, S., Wang, T., Wu, G., Huang, Y., Li, Q.",Atomically dispersed Zn-Co-N-C catalyst boosting efficient and robust oxygen reduction catalysis in acid via stabilizing Co-N bonds,2023,Fundamental Research,3,6,,909,917,,15,10.1016/j.fmre.2022.03.008,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85127766718&doi=10.1016%2Fj.fmre.2022.03.008&partnerID=40&md5=6a2fd09999f8a69a7f1b4d5db12613b9,"Huazhong University of Science and Technology, Wuhan, Hubei, China; Institute of Advanced Materials and Nanotechnology, Wuhan University of Science and Technology, Wuhan, Hubei, China; Yanshan University, Qinhuangdao, Hebei, China; School of Engineering and Applied Sciences, Buffalo, NY, United States; State Key Laboratory of Coal Conversion, Institute of Coal Chemistry Chinese Academy of Sciences, Taiyuan, Shanxi, China; Synfuels China Technology Co.Ltd., Beijing, China; Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Shantou University, Shantou, Guangdong, China","Ma, Feng, Huazhong University of Science and Technology, Wuhan, Hubei, China, Institute of Advanced Materials and Nanotechnology, Wuhan University of Science and Technology, Wuhan, Hubei, China; Liu, Xuan, Huazhong University of Science and Technology, Wuhan, Hubei, China; Wang, Xiaoming, Shantou University, Shantou, Guangdong, China; Liang, Jiashun, Huazhong University of Science and Technology, Wuhan, Hubei, China; Huang, Jianyu, Yanshan University, Qinhuangdao, Hebei, China; Priest, Cameron M., School of Engineering and Applied Sciences, Buffalo, NY, United States; Liu, Jinjia, State Key Laboratory of Coal Conversion, Institute of Coal Chemistry Chinese Academy of Sciences, Taiyuan, Shanxi, China, Synfuels China Technology Co.Ltd., Beijing, China; Jiao, Shuhong, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Wang, Tanyuan, Huazhong University of Science and Technology, Wuhan, Hubei, China; Wu, Gang, School of Engineering and Applied Sciences, Buffalo, NY, United States; Huang, Yunhui, Huazhong University of Science and Technology, Wuhan, Hubei, China; Li, Qing, Huazhong University of Science and Technology, Wuhan, Hubei, China","Transition metal supported N-doped carbon (M-N-C) catalysts for oxygen reduction reaction (ORR) are viewed as the promising candidate to replace Pt-group metal (PGM) for proton exchange membrane fuel cells (PEMFCs). However, the stability of M-N-C is extremely challenging due to the demetalation, H<inf>2</inf>O<inf>2</inf> attack, etc. in the strongly oxidative conditions of PEMFCs. In this study, we demonstrate the universal effect of Zn on promoting the stability of atomically dispersed M-N<inf>x</inf>/C (M = Co, Fe, Mn) catalysts and the enhancement mechanism is unveiled for the first time. The best-performing dual-metal-site Zn-Co-N-C catalyst exhibits a high half-wave potential (E<inf>1/2</inf>) value of 0.81 V vs. reversible hydrogen electrode (RHE) in acid and outstanding durability with no activity decay after 15,000 accelerated degradation test (ADT) cycles at 60 °C, surpassing most reported Co-based PGM-free catalysts in acid media. For comparison, the Co-N-C in the absence of Zn suffers from a rapid degradation after ADT due to the demetalation and higher H<inf>2</inf>O<inf>2</inf> yield. X-ray adsorption spectroscopy (XAS) and density functional theory (DFT) calculations suggest the more negative formation energy (by 1.2 eV) and increased charge transfer of Zn-Co dual-site structure compared to Co-N-C could strength the Co-N bonds against the demetalation and the optimized d-band center accounts for the improved ORR kinetics. © 2022",Demetalation; Electrocatalysis; Metal-nitrogen carbon catalysts; Non-noble metal catalysts; Oxygen reduction reaction; Structural stability,,Demetalation;Electrocatalysis;Metal-nitrogen carbon catalysts;Non-noble metal catalysts;Oxygen reduction reaction;Structural stability,"Q. Li; State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China; email: qing_li@hust.edu.cn",,,,,,KeAi Communications Co.,20969457,,,,English,Fundam. Res.,Article,Scopus,,2-s2.0-85127766718,,China;United States,hust.edu.cn,,,"Ma, F.; Liu, X.; Wang, X.; Liang, J.; Huang, J.; Priest, C.; Liu, J.; Jiao, S.; Wang, T.; Wu, G.; Huang, Y.; Li, Q."
"Xiang, X., Zhang, X.R., Yan, B.W., Wang, K., Wang, Y.Q., Lyu, D.D., Xi, S.B., Tian, Z.Q., Shen, P.K.",Atomic iron coordinated by nitrogen doped carbon nanoparticles synthesized via a synchronous complexation-polymerization strategy as efficient oxygen reduction reaction electrocatalysts for zinc-air battery and fuel cell application,2022,CHEMICAL ENGINEERING JOURNAL,440,,135721,,,13,31,10.1016/j.cej.2022.135721,,"[Xiang, Xue; Zhang, Xiaoran; Yan, Bowen; Wang, Kun; Wang, Yunqiu; Lyu, Dandan; Tian, Zhi Qun; Shen, Pei Kang] Guangxi Univ, Guangxi Key Lab Electrochem Energy Mat, State Key Lab Proc Nonferrous Met & Featured Mat, Collaborat Innovat Ctr Sustainable Energy Mat,Sch, Nanning 530004, Peoples R China; [Xi, Shibo] Inst Chem & Engn Sci, Singapore 627833, Singapore",,"Developing atomic transition metal coordinated by nitrogen doped carbon (M-N-C) eletrocatalysts for oxygen reduction reaction (ORR) is critical to achieve low cost metal-air batteries and fuel cells. Herein, a general method of synthesizing M-N-C was developed via a synchronous complexation-polymerization strategy, in which nitrogen-containing ligand was coordinated with specific transition metal ions and diamino aromatic compound was simultaneously polymerized by the metal ion as initiator; by the following pyrolysis in a molten NaCl bath, M-N-C was finally synthesized. Fe-N-C was synthesized by this strategy using 2, 4, 6-Tri (2-pyridyl)1, 3, 5-triazine (TPTZ) as ligand for FeCl2, and 1, 8-Diaminonaphthalene (DAN) as monomer of polymerization. Results demonstrate that introducing DAN into TPTZ-Fe-2} significantly affect the derived carbon structure and electrochemical performance of corresponding Fe-N-C. The Fe-N-C prepared by TPTZ and DAN with the molar ratio of 1:1 shows excellent ORR activity and durability, whose initial half-wave potential is 0.90 V in 0.1 M KOH and 0.80 V in 0.5 M H2SO4 respectively, after 10 K cycles, the potential is only 14 mV loss in 0.1 M KOH and 20 mV decay in 0.5 M H2SO4. And the ORR performance as cathode is further proved by a single practical Zn-air battery with a maximum power density of 192 mW cm(-2) and a specific capacity of 800 mAh gZn-1, much higher than 137 mW cm(-2) and 735 mAh gZn(-1) of the same loading of commercial Pt/C catalyst and proton exchange membrane fuel cell with a high power output of 640 mW cm(-2). Attributed to the vast kinds of ligands, metal ions and polymerizing monomers, this strategy provides a flexible platform of synthesizing advanced M-N-C catalysts, compared with other reported methods.",Transition mental-nitrogen-carbon catalysts; Fe-N-C; Oxygen reduction reaction; Complexation-polymerization strategy; Zn-air battery; Proton exchange membrane fuel cell,BIFUNCTIONAL CATALYSTS; DISPERSED FE; SITES; ALKALINE; DESIGN; ORR,Transition mental-nitrogen-carbon catalysts;Fe-N-C;Oxygen reduction reaction;Complexation-polymerization strategy;Zn-air battery;Proton exchange membrane fuel cell;BIFUNCTIONAL CATALYSTS;DISPERSED FE;SITES;ALKALINE;DESIGN;ORR,tianzhiqun@gxu.edu.cn,,"PO BOX 564, 1001 LAUSANNE, SWITZERLAND",,,,ELSEVIER SCIENCE SA,1385-8947,,,,English,CHEM ENG J,Article,WoS,Engineering,WOS:000783208400001,2-s2.0-85126631233,China;Singapore,gxu.edu.cn,Guangxi Univ;Inst Chem & Engn Sci,"Guangxi Univ, China;Inst Chem & Engn Sci, Singapore","Xiang, Xue; Zhang, Xiaoran; Yan, Bowen; Wang, Kun; Wang, Yunqiu; Lyu, Dandan; Xi, Shibo; Tian, Zhi Qun; Shen, Pei Kang"
"Yin, H., Xia, H., Zhao, S., Li, K., Zhang, J., Mu, S.",Atomic Level Dispersed Metal–Nitrogen–Carbon Catalyst toward Oxygen Reduction Reaction: Synthesis Strategies and Chemical Environmental Regulation,2021,Energy and Environmental Materials,4,1,,5,18,,74,10.1002/eem2.12085,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097450124&doi=10.1002%2Feem2.12085&partnerID=40&md5=b862278d1b88aa666f041a9fee6ce432,"College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Wuhan University of Technology, Wuhan, Hubei, China","Yin, Hengbo, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Xia, Huicong, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Zhao, Shuyan, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Li, Kexie, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Zhang, Jianan, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Mu, Shichun, Wuhan University of Technology, Wuhan, Hubei, China","For development and application of proton exchange membrane fuel cell (PEMFC) energy transformation technology, the cost performance must be elevated for the catalyst. At present, compared with noble metal-based catalysts, such as Pt-based catalysts, atomically dispersed metal–nitrogen–carbon (M–N–C) catalysts are popularity and show great potential in maximizing active site density, high atom utilization and high activity, making them the first choice to replace Pt-based catalysts. In the preparation of atomically dispersed metal–nitrogen–carbon catalyst, it is difficult to ensure that all active sites are uniformly dispersed, and the structure system of the active sites is not optimal. Based on this, we focus on various approaches for preparing M–N–C catalysts that are conducive to atomic dispersion, and the influence of the chemical environmental regulation of atoms on the catalytic sites in different catalysts. Therefore, we discuss the chemical environmental regulation of the catalytic sites by bimetals, atom clusters, and heteroatoms (B, S, and P). The active sites of M–N–C catalysts are explored in depth from the synthesis and characterization, reaction mechanisms, and density functional theory (DFT) calculations. Finally, the existing problems and development prospects of the current atomic dispersion M–N–C catalyst are proposed in detail. © 2020 Zhengzhou University",atomic-level catalyst; chemical environmental effects; metal–nitrogen–carbon; oxygen reduction reaction; synthesis strategy,Atoms; Carbon; Density functional theory; Dispersions; Electrolytic reduction; Environmental regulations; Nitrogen; Oxygen; Platinum metals; Proton exchange membrane fuel cells (PEMFC); Active site density; Development and applications; Development prospects; Energy transformation; Metal-based catalysts; Reaction mechanism; Synthesis and characterizations; Synthesis strategy; Catalyst activity,atomic-level catalyst;chemical environmental effects;metal–nitrogen–carbon;oxygen reduction reaction;synthesis strategy;Atoms;Carbon;Density functional theory;Dispersions;Electrolytic reduction;Environmental regulations;Nitrogen;Oxygen;Platinum metals;Proton exchange membrane fuel cells (PEMFC);Active site density;Development and applications;Development prospects;Energy transformation;Metal-based catalysts;Reaction mechanism;Synthesis and characterizations;Catalyst activity,"J. Zhang; College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China; email: zjn@zzu.edu.cn",,,,,,John Wiley and Sons Inc,25750348,,,,English,Energy Environ. Mater.,Review,Scopus,,2-s2.0-85097450124,,China,zzu.edu.cn,,,"Yin, H.; Xia, H.; Zhao, S.; Li, K.; Zhang, J.; Mu, S."
"Pedersen, A., Bagger, A., Barrio, J., Maillard, F., Stephens, I.E.L., Titirici, M.M.","Atomic metal coordinated to nitrogen-doped carbon electrocatalysts for proton exchange membrane fuel cells: a perspective on progress, pitfalls and prospectives",2023,JOURNAL OF MATERIALS CHEMISTRY A,11,43,,23211,23222,12,21,10.1039/d3ta04711c,,"[Pedersen, Angus; Bagger, Alexander; Stephens, Ifan E. L.] Imperial Coll London, Royal Sch Mines, Dept Mat, London SW7 2AZ, England; [Pedersen, Angus; Barrio, Jesus; Titirici, Maria-Magdalena] Imperial Coll London, Dept Chem Engn, London SW7 2AZ, England; [Bagger, Alexander] Tech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark; [Maillard, Frederic] Univ Grenoble Alpes, Univ Savoie Mont Blanc, CNRS, Grenoble INP,LEPMI, F-38000 Grenoble, France; [Titirici, Maria-Magdalena] Tohoku Univ, Adv Inst Mat Res WPI AIMR, 2-1-1 Katahira,Aoba ku, Sendai, Miyagi 9808577, Japan",,"Proton exchange membrane fuel cells require reduced construction costs to improve commercial viability, which can be fueled by elimination of platinum as the O-2 reduction electrocatalyst. The past 10 years has seen significant developments in synthesis, characterisation, and electrocatalytic performance of the most promising alternative electrocatalyst; single metal atoms coordinated to nitrogen-doped carbon (M-N-C). In this Perspective we recap some of the important achievements of M-N-Cs in the last decade, as well as discussing current knowledge gaps and future research directions for the community. We provide a new outlook on M-N-C stability and atomistic understanding with a set of original density functional theory simulations.",,OXYGEN-REDUCTION REACTION; PYROLYSIS DIRECT OBSERVATION; ACTIVE-SITE DENSITY; O-2 ELECTROREDUCTION; FE/N/C CATALYSTS; PERFORMANCE; STABILITY; TRANSFORMATIONS; CONDUCTIVITY; DEGRADATION,OXYGEN-REDUCTION REACTION;PYROLYSIS DIRECT OBSERVATION;ACTIVE-SITE DENSITY;O-2 ELECTROREDUCTION;FE/N/C CATALYSTS;PERFORMANCE;STABILITY;TRANSFORMATIONS;CONDUCTIVITY;DEGRADATION,a.pedersen19@imperial.ac.uk; m.titirici@imperial.ac.uk,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,38013915,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:001086152100001,2-s2.0-85175534074,United Kingdom;Denmark;France;Japan,imperial.ac.uk,Imperial Coll London;Tech Univ Denmark;Univ Grenoble Alpes;Tohoku Univ,"Imperial Coll London, United Kingdom;Tech Univ Denmark, Denmark;Univ Grenoble Alpes, France;Tohoku Univ, Japan","Pedersen, Angus; Bagger, Alexander; Barrio, Jesus; Maillard, Frederic; Stephens, Ifan E. L.; Titirici, Maria-Magdalena"
"Dong, L., Yu, C., Yan, B., Li, J., Yang, B., Lin, M., Huang, J., Xiao, W., Zhong, J.B., Shen, P.K., Tian, Z.Q.",Atomic Rare-Earth Gd-N-C Nanosheets with Low f-d-p Hybridization Energy for Efficient Oxygen Reduction Reaction,2025,Advanced Functional Materials,35,36,2501884,,,,11,10.1002/adfm.202501884,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105002143253&doi=10.1002%2Fadfm.202501884&partnerID=40&md5=abcf08aa6341d4efdd26764314d8d8a2,"State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Ltd., Hefei, Anhui, China","Dong, Liangde, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Yu, Cunhuai, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Yan, Bowen, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Li, Jiawang, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Yang, Bin, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Lin, Mingjie, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Huang, Ji, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Xiao, Wanling, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Zhong, Jianbin, Ltd., Hefei, Anhui, China; Shen, Peikang, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Tian, Zhiqun, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China","Developing the new member of transition Metal-nitrogen-carbon (M-N-C) for oxygen reduction reaction (ORR) is critical to address the issues in 3d-orbital metal M-N-C as noble metal-free catalyst to achieve affordable fuel cells and metal-air batteries. Herein, Gd-N-C nanosheets are developed by pyrolyzing the self-polymerized compound of 2, 6-diaminopyridine initiated by GdCl<inf>3</inf>. The Gd-N-C features a unique mixed structure of single GdN<inf>5</inf> moieties and Gd<inf>x</inf>N<inf>y</inf>O<inf>z</inf> atomic clusters, exhibiting excellent ORR performance with the half-wave potentials of 0.89 and 0.76 V versus RHE in 0.1 M KOH and 0.5 M H<inf>2</inf>SO<inf>4</inf>, respectively, the ORR activity is confirmed by the high-performance Zn-air battery and proton exchange membrane fuel cell with a maximum power density of 191 and 370 mW cm−2 as cathodes, respectively. Moreover, the theoretical calculation verifies that the single GdN<inf>5</inf> moiety with specific f-d hybridization facilitates the interaction with the intermediate OH* to produce the d-p hybridization, which can significantly reduce the adsorption energy of OH*, while the existence of Gd<inf>x</inf>N<inf>y</inf>O<inf>z</inf> atomic clusters also can enhance the d-p hybridization effect and effectively promote the ORR. The results confirm the atomic Gd-N-C as the new active site for ORR for the first time and extend the library of the M-N-C catalysts. © 2025 Wiley-VCH GmbH.",atomic gd catalyst; fuel cells; oxygen reduction reaction; transition metal-nitrogen-carbon; Zn-Air batteries,Barium compounds; Electrolytic reduction; Gadolinium alloys; Gadolinium compounds; Hafnium oxides; Manganese compounds; Neodymium compounds; Oxygen reduction reaction; Tungsten compounds; Zinc air batteries; Zinc sulfide; Atomic clusters; Atomic gd catalyst; Hybridization energy; New members; Nitrogen-carbon; Orbitals; Rare earth Gd; Transition metal-nitrogen-carbon; ]+ catalyst; Potassium hydroxide,atomic gd catalyst;fuel cells;oxygen reduction reaction;transition metal-nitrogen-carbon;Zn-Air batteries;Barium compounds;Electrolytic reduction;Gadolinium alloys;Gadolinium compounds;Hafnium oxides;Manganese compounds;Neodymium compounds;Tungsten compounds;Zinc air batteries;Zinc sulfide;Atomic clusters;Hybridization energy;New members;Nitrogen-carbon;Orbitals;Rare earth Gd;]+ catalyst;Potassium hydroxide,"Z.Q. Tian; Collaborative Innovation Center of Sustainable Energy Materials, School of Physical Science and Technology, Guangxi University, Guangxi Key Laboratory of Electrochemical Energy Materials, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning, 530004, China; email: tianzhiqun@gxu.edu.cn",,,,,,John Wiley and Sons Inc,1616301X,,AFMDC,,English,Adv. Funct. Mater.,Article,Scopus,,2-s2.0-105002143253,,China,gxu.edu.cn,,,"Dong, L.; Yu, C.; Yan, B.; Li, J.; Yang, B.; Lin, M.; Huang, J.; Xiao, W.; Zhong, J.B.; Shen, P.K.; Tian, Z.Q."
"Zhang, L.L., Tong, L., Lv, X.H., Yan, Q.Q., Ding, Y.W., Wang, Y.C., Liang, H.W.",A Top-Down Templating Strategy toward Functional Porous Carbons,2022,SMALL,18,26,2201838,,,9,14,10.1002/smll.202201838,,"[Zhang, Le-Le; Tong, Lei; Yan, Qiang-Qiang; Ding, Yan-Wei; Liang, Hai-Wei] Univ Sci & Technol China, Dept Chem, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China; [Lv, Xue-Hui; Wang, Yu-Cheng] Xiamen Univ, Coll Chem & Chem Engn, Collaborat Innovat Ctr Chem Energy Mat, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China",,"Nanostructured carbon materials with high porosity and desired chemical functionalities are of immense interest because of their wide application potentials in catalysis, environment, and energy storage. Herein, a top-down templating strategy is presented for the facile synthesis of functional porous carbons, based on the direct carbonization of diverse organic precursors with commercially available metal oxide powders. During the carbonization, the metal oxide powders can evolve into nanoparticles that serve as in situ templates to introduce nanopores in carbons. The porosity and heteroatom doping of the prepared carbon materials can be engineered by varying the organic precursors and/or the metal oxides. It is further demonstrated that the top-down templating strategy is applicable to prepare carbon-based single-atom catalysts with iron-nitrogen sites, which exhibit a high power density of 545 mW cm(-2) in a H-2-air proton exchange membrane fuel cell.",fuel cells; oxygen reduction reaction; porous carbons; single-atom catalysts; top-down templating,OXYGEN REDUCTION REACTION; METAL-ORGANIC FRAMEWORKS; ACTIVE-SITES; FUEL-CELLS; FE; PERFORMANCE; CATALYSTS; ELECTROCATALYSTS; POLYMER; STORAGE,fuel cells;oxygen reduction reaction;porous carbons;single-atom catalysts;top-down templating;METAL-ORGANIC FRAMEWORKS;ACTIVE-SITES;FUEL-CELLS;FE;PERFORMANCE;CATALYSTS;ELECTROCATALYSTS;POLYMER;STORAGE,ltong17@mail.ustc.edu.cn; wangyc@xmu.edu.cn; hwliang@ustc.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1613-6810,,,35618445,English,SMALL,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000800333800001,2-s2.0-85130597884,China,mail.ustc.edu.cn,Univ Sci & Technol China;Xiamen Univ,"Univ Sci & Technol China, China;Xiamen Univ, China","Zhang, Le-Le; Tong, Lei; Lv, Xue-Hui; Yan, Qiang-Qiang; Ding, Yan-Wei; Wang, Yu-Cheng; Liang, Hai-Wei"
"Wei, J., Liang, Y., Hu, Y., Kong, B., Simon, G.P., Zhang, J., Jiang, S.P., Wang, H.",A Versatile Iron-Tannin-Framework Ink Coating Strategy to Fabricate Biomass-Derived Iron Carbide/Fe-N-Carbon Catalysts for Efficient Oxygen Reduction,2016,Angewandte Chemie - International Edition,55,4,,1355,1359,,233,10.1002/anie.201509024,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956734963&doi=10.1002%2Fanie.201509024&partnerID=40&md5=4285e74066295ff8412f40390de75c5f,"Department of Chemical Engineering, Monash University, Melbourne, VIC, Australia; Department of Materials Engineering, Monash University, Melbourne, VIC, Australia; Department of Chemical Engineering, Curtin University, Perth, WA, Australia","Wei, Jing, Department of Chemical Engineering, Monash University, Melbourne, VIC, Australia; Liang, Yan, Department of Chemical Engineering, Monash University, Melbourne, VIC, Australia; Hu, Yaoxin, Department of Chemical Engineering, Monash University, Melbourne, VIC, Australia; Kong, Biao, Department of Chemical Engineering, Monash University, Melbourne, VIC, Australia; Simon, George P., Department of Materials Engineering, Monash University, Melbourne, VIC, Australia; Zhang, Jin, Department of Chemical Engineering, Curtin University, Perth, WA, Australia; Jiang, San Ping, Department of Chemical Engineering, Curtin University, Perth, WA, Australia; Wang, Huanting, Department of Chemical Engineering, Monash University, Melbourne, VIC, Australia","The conversion of biomass into valuable carbon composites as efficient non-precious metal oxygen-reduction electrocatalysts is attractive for the development of commercially viable polymer electrolyte membrane fuel-cell technology. Herein, a versatile iron-tannin-framework ink coating strategy is developed to fabricate cellulose-derived Fe<inf>3</inf>C/Fe-N-C catalysts using commercial filter paper, tissue, or cotton as a carbon source, an iron-tannin framework as an iron source, and dicyandiamide as a nitrogen source. The oxygen reduction performance of the resultant Fe<inf>3</inf>C/Fe-N-C catalysts shows a high onset potential (i.e. 0.98 V vs the reversible hydrogen electrode (RHE)), and large kinetic current density normalized to both geometric electrode area and mass of catalysts (6.4 mA cm-2 and 32 mA mg-1 at 0.80 V vs RHE) in alkaline condition. This method can even be used to prepare efficient catalysts using waste carbon sources, such as used polyurethane foam. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.",biomass; carbon; metal-tannin framework; non-precious metal catalysts; oxygen reduction reaction,Biomass; Carbides; Carbon; Carbon carbon composites; Coatings; Electrocatalysts; Electrodes; Electrolysis; Electrolytes; Electrolytic reduction; Flavonoids; Foams; Fuel cells; Iron; Membrane technology; Oxygen; Polyelectrolytes; Precious metals; Proton exchange membrane fuel cells (PEMFC); Tannins; Alkaline conditions; Carbon composites; Efficient catalysts; Non-precious metal catalysts; Non-precious metals; Oxygen reduction reaction; Polymer electrolyte membranes; Reversible hydrogen electrodes; Catalysts,biomass;carbon;metal-tannin framework;non-precious metal catalysts;oxygen reduction reaction;Carbides;Carbon carbon composites;Coatings;Electrocatalysts;Electrodes;Electrolysis;Electrolytes;Electrolytic reduction;Flavonoids;Foams;Fuel cells;Iron;Membrane technology;Oxygen;Polyelectrolytes;Precious metals;Proton exchange membrane fuel cells (PEMFC);Tannins;Alkaline conditions;Carbon composites;Efficient catalysts;Non-precious metals;Polymer electrolyte membranes;Reversible hydrogen electrodes;Catalysts,"H. Wang; Department of Chemical Engineering, Monash University, Clayton, 3800, Australia; email: huanting.wang@monash.edu",,,,,,Wiley-VCH Verlag info@wiley-vch.de,14337851,,ACIEF,,English,Angew. Chem. Int. Ed.,Article,Scopus,,2-s2.0-84956734963,,Australia,monash.edu,,,"Wei, J.; Liang, Y.; Hu, Y.; Kong, B.; Simon, G.P.; Zhang, J.; Jiang, S.P.; Wang, H."
"Zhao, D., Shui, J.L., Grabstanowicz, L.R., Liu, D.J.",A Versatile Preparation of Highly Active ZIF-based Non-PGM Catalysts through Solid State Synthesis,2014,POLYMER ELECTROLYTE FUEL CELLS 14,64,3,,253,260,8,1,10.1149/06403.0253ecst,,"[Zhao, D.; Shui, J. -L.; Grabstanowicz, L. R.; Liu, D. -J.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA; [Zhao, D.] Natl Univ Singapore, Dept Biomol & Chem Engn, Singapore 117576, Singapore; [Grabstanowicz, L. R.] Univ Illinois, Dept Chem, De Kalb, IL 60115 USA",,"Current proton exchange membrane fuel cell uses precious metal such as platinum as the catalyst to promote electrochemical reactions at both electrodes, which presents a significant cost barrier for large scale fuel cell commercialization. To replace precious metal with other low cost, earth-abundant materials represents a critical yet incredible challenging area in future fuel cell research. To compete with the precious metal based catalyst, the non-platinum group metal (non-PGM) materials must have higher active site density and improved turn-over-frequency. In this report, we discuss a new method of preparing ""support-free"", low-cost non-PGM catalysts produced by using ""one-pot"" synthesized metal-organic frameworks. The new approach led to the formation of catalysts with high-density of active site and high efficiency towards the oxygen reduction reaction in the acidic medium, measured by rotating disk electrode in oxygen saturated electrolyte and under single fuel cell operating condition.",,MEMBRANE FUEL-CELLS; METAL ELECTROCATALYSTS,MEMBRANE FUEL-CELLS;METAL ELECTROCATALYSTS,djliu@anl.gov,"Gasteiger, HA; Uchida, H; Buchi, FN; SwiderLyons, K; Jones, D; Ramani, V; Schmidt, TJ; Weber, A; Fenton, JM; Meas, Y; Shinohara, K; Edmundson, M; Perry, KA; Coutanceau, C; Mitsushima, S; Strasser, P; Mantz, R; Fuller, T; Narayanan, SR","65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA",14th Polymer Electrolyte Fuel Cell Symposium (PEFC),"Cancun, MEXICO","OCT 05-09, 2014",ELECTROCHEMICAL SOC INC,1938-5862,978-1-60768-539-5,,,English,ECS TRANSACTIONS,Proceedings Paper,WoS,Electrochemistry; Energy & Fuels; Polymer Science,WOS:000356722200029,2-s2.0-84921280747,United States;Singapore,anl.gov,Argonne Natl Lab;Natl Univ Singapore;Univ Illinois,"Argonne Natl Lab, United States;Natl Univ Singapore, Singapore;Univ Illinois, United States","Zhao, D.; Shui, J. -L.; Grabstanowicz, L. R.; Liu, D. -J."
"Liu, J., Wang, J., Zhang, L.J., Fan, C.H., Zhou, X., Zhang, B.S., Cui, X.J., Wang, J.Q., Cheng, Y., Sun, S.H., Jiang, L.H.",Axial ligand promoted phosphate tolerance of an atomically dispersed Fe catalyst towards the oxygen reduction reaction,2022,JOURNAL OF MATERIALS CHEMISTRY A,10,31,,16722,16729,8,14,10.1039/d2ta03312g,,"[Liu, Jing; Wang, Jie; Fan, Chaohua; Cui, Xuejing; Jiang, Luhua] Qingdao Univ Sci & Technol, Coll Mat Sci & Engn, Electrocatalysis & Nanomat Lab, Qingdao 266042, Peoples R China; [Zhang, Linjuan; Wang, Jianqiang] Chinese Acad Sci, Shanghai Inst Appl Phys, Key Lab Interfacial Phys & Technol, Shanghai 201800, Peoples R China; [Zhou, Xin; Cheng, Yi] Dalian Univ, Coll Environm & Chem Engn, Dalian 116622, Peoples R China; [Zhang, Bingsen] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China; [Cheng, Yi] Cent South Univ, Sch Met & Environm, Dept Environm Engn, Changsha 410083, Peoples R China; [Sun, Shuhui] Ctr Energie Mat & Telecommun, Inst Natl Rech Sci INRS, Varennes, PQ J3X 1P7, Canada",,"Developing active, stable and phosphate anion resistant catalysts is critical for high-temperature proton exchange membrane fuel cells based on phosphoric acid-doped polybenzimidazole (PA-PBI) membranes. Herein, an iron catalyst with a five-coordinated Fe active center is elaborately designed. The experimental and theoretical studies show that the planar Fe-N-4 moiety with an axial O ligand, benefiting from the optimized charge redistribution, weakens phosphate anion adsorption on Fe active centers and simultaneously promotes oxygen molecule dissociation, resulting in excellent phosphate anion tolerance and ORR activity with the half-wave potential remaining at 0.81 V. The axial-ligand promoted Fe-N-C catalyst is assembled for the first time in a PA-PBI fuel cell, delivering a decent performance. This study sheds light on the intrinsic cause for the phosphate anion tolerance of Fe-N-C catalysts at a molecular level, which provides guidance for designing highly active and stable electrocatalysts for PA-PBI fuel cells.",,MEMBRANE FUEL-CELLS; N-C CATALYSTS; NANOTUBE COMPOSITES; ANION ADSORPTION; CARBON; METAL; ELECTRODE; ELECTROCATALYSTS; COORDINATION; PERFORMANCE,MEMBRANE FUEL-CELLS;N-C CATALYSTS;NANOTUBE COMPOSITES;ANION ADSORPTION;CARBON;METAL;ELECTRODE;ELECTROCATALYSTS;COORDINATION;PERFORMANCE,wangjianqiang@sinap.ac.cn; yi.cheng@csu.edu.cn; luhuajiang@qust.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000834933000001,2-s2.0-85135590894,China;Canada,sinap.ac.cn,Qingdao Univ Sci & Technol;Chinese Acad Sci;Dalian Univ;Cent South Univ;Ctr Energie Mat & Telecommun,"Qingdao Univ Sci & Technol, China;Chinese Acad Sci, China;Dalian Univ, China;Cent South Univ, China;Ctr Energie Mat & Telecommun, Canada","Liu, Jing; Wang, Jie; Zhang, Linjuan; Fan, Chaohua; Zhou, Xin; Zhang, Bingsen; Cui, Xuejing; Wang, Jianqiang; Cheng, Yi; Sun, Shuhui; Jiang, Luhua"
"Roy, A., Girardi, L., Mosconi, D., Sougrati, M.T., Jones, D., Agnoli, S., Jaouen, F.",Bifunctional Zinc-Molybdate or Zinc molybdenum Oxide/Metal-Nitrogen-Carbon catalytic layers with improved four-electron selectivity for oxygen reduction in acidic medium,2023,Electrochimica Acta,457,,142503,,,,1,10.1016/j.electacta.2023.142503,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85154536705&doi=10.1016%2Fj.electacta.2023.142503&partnerID=40&md5=9fd7632bf234820fe66eff6f02ee9641,"Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Dipartimento di Scienze Chimiche and INSTM Research Unit, Università degli Studi di Padova, Padua, PD, Italy","Roy, Aaron, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Girardi, Leonardo, Dipartimento di Scienze Chimiche and INSTM Research Unit, Università degli Studi di Padova, Padua, PD, Italy; Mosconi, Dario, Dipartimento di Scienze Chimiche and INSTM Research Unit, Università degli Studi di Padova, Padua, PD, Italy; Sougrati, Moulay T., Dipartimento di Scienze Chimiche and INSTM Research Unit, Università degli Studi di Padova, Padua, PD, Italy; Jones, Deborah Jacqueline, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Agnoli, Stefano, Dipartimento di Scienze Chimiche and INSTM Research Unit, Università degli Studi di Padova, Padua, PD, Italy; Jaouen, Frédéric, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France","Platinum-group-metal-free metal-nitrogen-carbon catalysts for the oxygen reduction reaction have demonstrated high initial activity and power performance in proton exchange membrane fuel cells. The main challenge facing this class of catalysts is their poor durability in operating acidic fuel cells. Their key operando degradation mechanisms involve oxidative attacks triggered by the catalysis of the oxygen reduction on atomically-dispersed 3d transition metals. Reactive oxygen species such as H<inf>2</inf>O<inf>2</inf> or radical species are particularly aggressive to the carbon matrix. Minimizing H<inf>2</inf>O<inf>2</inf> by-product formation during oxygen reduction or actively scavenging any formed H<inf>2</inf>O<inf>2</inf> are therefore promising routes to improve their durability. Here, we report that Zn-molybdate and Zn molybdenum oxide have low activity towards H<inf>2</inf>O<inf>2</inf> decomposition and electro-reduction in acid, but result in a strong synergistic effect with various M-N-C catalysts. The addition of α-ZnMoO<inf>4</inf> or Zn<inf>3</inf>(OH)<inf>2</inf>(MoO<inf>4</inf>)<inf>2</inf> in cathode layers resulted in improved four-electron ORR selectivity of M-N-C catalysts (M = Fe, Co, Cr) as well as moderately improved durability in accelerated stress tests in O<inf>2</inf>-saturated pH 1 electrolyte. The improvement in selectivity could be rationalized by hydrogen peroxide electro-reduction measurements and catalase enzyme-like activity tests. Both types of measurements revealed higher reactivity towards H<inf>2</inf>O<inf>2</inf> scavenging when Metal-N-C catalysts are physically mixed (in a catalytic layer) or together in a suspension in solution with Zn-molybdate or Zn molybdenum oxide, revealing a synergy effect. Control experiments with ZnCl<inf>2</inf> and Na<inf>2</inf>MoO<inf>4</inf> salts however suggest that leached ions from ZnMoO<inf>4</inf> in acidic solution are likely at the root of the synergy effect. © 2023",Catalase; Metal-nitrogen-carbon; Oxygen reduction reaction; Selectivity; Synergy; Zinc molybdate,Carbon; Catalyst activity; Catalyst selectivity; Degradation; Durability; Electrolytes; Electrolytic reduction; Enzyme activity; Molybdenum oxide; Nitrogen; Oxygen; Proton exchange membrane fuel cells (PEMFC); Sodium compounds; Transition metals; Zinc chloride; Catalase; Catalytic layers; Metal-nitrogen-carbon; Nitrogen-carbon; Oxygen Reduction; Oxygen reduction reaction; Selectivity; Synergy; Zinc molybdate; ]+ catalyst; Chlorine compounds,Catalase;Metal-nitrogen-carbon;Oxygen reduction reaction;Selectivity;Synergy;Zinc molybdate;Carbon;Catalyst activity;Catalyst selectivity;Degradation;Durability;Electrolytes;Electrolytic reduction;Enzyme activity;Molybdenum oxide;Nitrogen;Oxygen;Proton exchange membrane fuel cells (PEMFC);Sodium compounds;Transition metals;Zinc chloride;Catalytic layers;Nitrogen-carbon;Oxygen Reduction;]+ catalyst;Chlorine compounds,"S. Agnoli; Dipartimento di Scienze Chimiche and INSTM Research Unit, Università degli Studi di Padova, Padova, Italy; email: stefano.agnoli@unipd.it",,,,,,Elsevier Ltd,00134686,,ELCAA,,English,Electrochim Acta,Article,Scopus,,2-s2.0-85154536705,,France;Italy,unipd.it,,,"Roy, A.; Girardi, L.; Mosconi, D.; Sougrati, M.T.; Jones, D.; Agnoli, S.; Jaouen, F."
"Lee, S., Kwak, D.H., Han, S.B., Lee, Y.W., Lee, J.Y., Choi, I.A., Park, H.S., Park, J.Y., Park, K.W.",Bimodal Porous Iron/Nitrogen-Doped Highly Crystalline Carbon Nanostructure as a Cathode Catalyst for the Oxygen Reduction Reaction in an Acid Medium,2016,ACS CATALYSIS,6,8,,5095,5102,8,72,10.1021/acscatal.5b02721,,"[Lee, Seul; Kwak, Da-Hee; Han, Sang-Beom; Lee, Young-Woo; Lee, Jin-Yeon; Choi, In-Ae; Park, Hyun-Suk; Park, Jin-Young; Park, Kyung-Won] Soongsil Univ, Dept Chem Engn, Seoul 156743, South Korea; [Lee, Young-Woo] Univ Oxford, Dept Engn Sci, Oxford OX1 3PJ, England",,"Doped carbon nanomaterials as non-precious-metal catalysts for the oxygen reduction reaction (ORR) in polymer electrolyte membrane fuel cells have received intense attraction. The improvement of ORR performance for the doped porous carbon nanostructures with high specific surface areas is mainly attributed to multidoped electrochemical active sites provided by the metallic (Fe, Co) and nonmetallic species (N, B, and S). Here, we prepared porous iron/nitrogen-doped carbon nanostructured materials via a simple synthesis process using silicate beads (500 and 50 nm diameter) as templates in the presence of 5,10,15,20-tetrakis(4-methoxyphenyl)-21H,23H-porphyrin (TMPP) or (5,10,15,20-tetrakis(4-methowhenyl)-21H,23H-porphyrin)iron(111) chloride (FeTMPP). The resulting samples exhibited a bimodal porous structure, homogeneous heteroatomic doping, and a fairly large specific surface area. In particular, the sample prepared using both 500 and 50 nm silicate beads with FeTMPP (FeTMPP-C-500/50) exhibited much improved ORR performance in an acid solution. The enhanced ORR properties of FeTMPP-C-500/50 could result from the fairly large specific surface area, mixed macro-/mesoporous structure, high crystallinity, and codoping of metal and nitrogen.",doped carbon; porous structure; bimodal porous; oxygen reduction reaction; acid medium,MEMBRANE FUEL-CELLS; HIGH ELECTROCATALYTIC ACTIVITY; NONPRECIOUS METAL ELECTROCATALYSTS; ELECTROCHEMICAL ACTIVITY; IRON PHTHALOCYANINE; COBALT-POLYPYRROLE; FACILE SYNTHESIS; NITROGEN; GRAPHENE; PERFORMANCE,doped carbon;porous structure;bimodal porous;oxygen reduction reaction;acid medium;MEMBRANE FUEL-CELLS;HIGH ELECTROCATALYTIC ACTIVITY;NONPRECIOUS METAL ELECTROCATALYSTS;ELECTROCHEMICAL ACTIVITY;IRON PHTHALOCYANINE;COBALT-POLYPYRROLE;FACILE SYNTHESIS;NITROGEN;GRAPHENE;PERFORMANCE,kwpark@ssu.ac.kr,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2155-5435,,,,English,ACS CATAL,Article,WoS,Chemistry,WOS:000381236700029,2-s2.0-84981335361,South Korea;United Kingdom,ssu.ac.kr,Soongsil Univ;Univ Oxford,"Soongsil Univ, South Korea;Univ Oxford, United Kingdom","Lee, Seul; Kwak, Da-Hee; Han, Sang-Beom; Lee, Young-Woo; Lee, Jin-Yeon; Choi, In-Ae; Park, Hyun-Suk; Park, Jin-Young; Park, Kyung-Won"
"Liu, Q.B., Xu, L., Liu, S.Z., Xiang, Z.H.",Binary ligand strategy toward interweaved encapsulation-nanotubes structured electrocatalyst for proton exchange membrane fuel cell,2022,JOURNAL OF ENERGY CHEMISTRY,64,,,129,135,7,16,10.1016/j.jechem.2021.04.064,,"[Liu, Qingbin; Xu, Li; Xiang, Zhonghua] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China; [Liu, Shizhen] PetroChina Co Ltd, Petrochem Res Inst, Block 42,CNPC Innovat Base, Beijing 102206, Peoples R China",,"Hierarchically porous architecture of iron-nitrogen-carbon (Fe-N-C) for oxygen reduction reaction (ORR) is highly desired towards efficient mass transfer in the fuel cell device manner. Herein, we reported a binary ligand strategy to prepare zeolitic imidazolate frameworks (ZIFs)-derived precursors, wherein the addition of secondary ligand endows precursors with the capabilities to transform into porously interweaved encapsulation-nanotubes structured composites after calcination. The optimal catalyst, i.e., termed as Fe-6-M/C-3, exhibits excellent durability with 88.8% current retention after 50,000 seconds in 0.1 M HClO4 solution by virtue of nanoparticles-encapsulation features, which is more positive than the benchmark commercial 20 wt% Pt/C catalyst. Moreover, a promising maximum power density of Fe-6-M/C-3 as cathode catalyst was also demonstrated in proton exchange membrane fuel cells (PEMFCs) measurements. Therefore, this binary ligand approach to the fabrication of hierarchically porous structures would also have significant implications for various other electrochemical reactions. (C) 2021 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.",Oxygen reduction reaction; Binary ligand strategy; Interweaved encapsulation-nanotubes architecture; Proton exchange membrane fuel cells,OXYGEN REDUCTION REACTION; DOPED CARBON NANOTUBES; N-C ELECTROCATALYST; ACTIVE-SITES; HIGH-PERFORMANCE; GRAPHENE FRAMEWORKS; NITROGEN; IRON; CATALYSTS; POLYMER,Oxygen reduction reaction;Binary ligand strategy;Interweaved encapsulation-nanotubes architecture;Proton exchange membrane fuel cells;DOPED CARBON NANOTUBES;N-C ELECTROCATALYST;ACTIVE-SITES;HIGH-PERFORMANCE;GRAPHENE FRAMEWORKS;NITROGEN;IRON;CATALYSTS;POLYMER,liushizhen@petrochina.com.cn; xiangzh@mail.buct.edu.cn,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2095-4956,,,,English,J ENERGY CHEM,Article,WoS,Chemistry; Energy & Fuels; Engineering,WOS:000678326500015,2-s2.0-85110332946,China,petrochina.com.cn,Beijing Univ Chem Technol;PetroChina Co Ltd,"Beijing Univ Chem Technol, China;PetroChina Co Ltd, China","Liu, Qingbin; Xu, Li; Liu, Shizhen; Xiang, Zhonghua"
"Mooste, M., Muller-Hulstede, J., Schonvogel, D., Zierdt, T., Buschermohle, J., Fuhrmann, K., Wilhelm, M., Wagner, P., Friedrich, K.A.",Binary transition metal and ZIF-8 functionalised polymer-derived ceramic catalysts for high temperature PEM fuel cell cathode,2025,ELECTROCHIMICA ACTA,514,,145620,,,15,5,10.1016/j.electacta.2024.145620,,"[Mooste, Marek; Mueller-Huelstede, Julia; Schonvogel, Dana; Zierdt, Tanja; Buschermoehle, Julia; Fuhrmann, Killian; Wagner, Peter] Inst Engn Thermodynam, German Aerosp Ctr DLR, Carl von Ossietzky Str 15, D-26129 Oldenburg, Germany; [Mooste, Marek] Univ Tartu, Inst Chem, Ravila 14a, EE-50411 Tartu, Estonia; [Wilhelm, Michaela] Univ Bremen, Adv Ceram, Biol Garten 2,IW3, D-28359 Bremen, Germany; [Friedrich, K. Andreas] German Aerosp Ctr DLR, Inst Engn Thermodynam, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germany",,"For addressing the clean energy transition, the high-temperature proton exchange membrane fuel cells (HTPEMFC) are attractive energy conversion devices for the long-range and heavy-duty vehicles, auxiliary power units, and aviation applications. One current drawback inhibiting HT-PEMFC commercialisation is the need for non-precious metal catalyst (NPMC) for oxygen reduction reaction (ORR) at the cathode. Here we propose the polymer derived ceramics (PDC) based material silicon oxycarbide (SiOC) with double transition metal (TM) doping and N-functionalisation for the NPMC preparation. The catalysts prepared with zeolitic imidazolate framework-8 (ZIF-8) as a N source exhibited high specific surface area, hierarchical porosity, and presence of TM (alloy) nanoparticles together with atomically dispersed TMs. The highest activity towards the ORR was observed in the case of Fe/Co containing and acid leached catalyst material (CoFe-N-SiOCa) exhibiting the highest long-term durability in 0.5 M H3PO4 solution and the best performance during the GDE testing in conc. H3PO4 at 160 degrees C. During HT-PEMFC testing, the open circuit voltage of 768 mV and power density at 100 mA cm-2 of 34 mW cm-2 with CoFe-N-SiOCa cathode were registered.",Electrocatalysis; Oxygen reduction reaction; Non-precious metal catalyst; High-temperature PEMFC; Dual-atom catalysts; ZIF-8,OXYGEN REDUCTION REACTION; N-C CATALYSTS; CARBON NANOTUBES; ELECTROCATALYSTS; FE; IRON; STABILITY; EFFICIENT; ADSORPTION; NANOFIBERS,Electrocatalysis;Oxygen reduction reaction;Non-precious metal catalyst;High-temperature PEMFC;Dual-atom catalysts;ZIF-8;N-C CATALYSTS;CARBON NANOTUBES;ELECTROCATALYSTS;FE;IRON;STABILITY;EFFICIENT;ADSORPTION;NANOFIBERS,marek.mooste@dlr.de,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:001398596000001,2-s2.0-85214505643,Germany;Estonia,dlr.de,Inst Engn Thermodynam;Univ Tartu;Univ Bremen;German Aerosp Ctr DLR,"Inst Engn Thermodynam, Germany;Univ Tartu, Estonia;Univ Bremen, Germany;German Aerosp Ctr DLR, Germany","Mooste, Marek; Mueller-Huelstede, Julia; Schonvogel, Dana; Zierdt, Tanja; Buschermoehle, Julia; Fuhrmann, Killian; Wilhelm, Michaela; Wagner, Peter; Friedrich, K. Andreas"
"Seeberger, D., McLaughlin, D., Hauenstein, P., Thiele, S.",Bipolar-interface fuel cells - an underestimated membrane electrode assembly concept for PGM-free ORR catalysts,2020,Sustainable Energy and Fuels,4,5,,2508,2518,,28,10.1039/d0se00288g,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85084571060&doi=10.1039%2Fd0se00288g&partnerID=40&md5=d742252577c4a8483cada7192941b394,"Forschungszentrum Jülich GmbH, Julich, Germany; Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany","Seeberger, Dominik, Forschungszentrum Jülich GmbH, Julich, Germany, Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; McLaughlin, David, Forschungszentrum Jülich GmbH, Julich, Germany, Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; Hauenstein, Pascal, Forschungszentrum Jülich GmbH, Julich, Germany, Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; Thiele, Simon, Forschungszentrum Jülich GmbH, Julich, Germany, Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany","We present the first combination of a bipolar interface fuel cell with a commercial Fe-N/C catalyst as an alkaline cathode and a PGM-based, acidic anode, both separated by a proton exchange membrane (PEM). This membrane electrode assembly (MEA) concept enables the employment of Fe-N/C catalysts in a less corrosive alkaline environment, while simultaneously keeping the profound advantages of the hydrogen oxidation reaction in acidic media with extremely low PGM-material requirement. We compare two different cases for the anion exchange polymer-proton exchange polymer (AEM|PEM) interface at the alkaline cathode and the acidic membrane. In one case the PEM is simply pressed against the alkaline electrode and in the other case a part of the PEM is deposited onto the alkaline electrode. We achieved power densities of about 38 mW cm−2and 210 mW cm−2respectively. This is corresponding to 2.1 W mg<inf>Pt</inf>−1cm−2. Our results show, that the bipolar interface design is one of the most important factors for performance optimization in BPM fuel cells. In addition, we compared a conventional PEM fuel cell with identical Fe-N/C cathode loading to the bipolar deposition case. After a 15 hour test run the PEMFC cell showed a strongly increased overpotential at lower current densities, whereas the overpotential increase for the bipolar cell was only marginally in the same current density region. With this work we show a facile manufacturing approach that enables bipolar interface fuel cells with Fe-N/C catalysts, showing promising power densities at low total PGM-loadings. © The Royal Society of Chemistry 2020.",,Alkaline fuel cells; Catalysts; Cathodes; Gas fuel purification; Alkaline environment; Hydrogen oxidation reaction; Interface designs; Material requirements; Membrane electrode assemblies; Performance optimizations; Power densities; Proton-exchange membrane; Proton exchange membrane fuel cells (PEMFC); catalyst; electrode; energy efficiency; fuel cell; hydrogen; ion exchange; membrane; optimization; oxidation; polymer,Alkaline fuel cells;Catalysts;Cathodes;Gas fuel purification;Alkaline environment;Hydrogen oxidation reaction;Interface designs;Material requirements;Membrane electrode assemblies;Performance optimizations;Power densities;Proton-exchange membrane;Proton exchange membrane fuel cells (PEMFC);catalyst;electrode;energy efficiency;fuel cell;hydrogen;ion exchange;membrane;optimization;oxidation;polymer,"S. Thiele; Forschungszentrum Jülich GmbH, Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Erlangen, Egerlandstr. 3, 91058, Germany; email: si.thiele@fz-juelich.de",,,,,,Royal Society of Chemistry,,,,,English,Sustain. Energy Fuels,Article,Scopus,,2-s2.0-85084571060,,Germany,fz-juelich.de,,,"Seeberger, D.; McLaughlin, D.; Hauenstein, P.; Thiele, S."
"Li, J.X., Sun, C.T., Fan, H.Y., Dong, F.L., Lv, Z.H., Liu, R., Yang, W.X., Wang, B.",Boosting active site accessibility and alleviating mass transfer resistance for high-performance fuel cells,2025,NANO RESEARCH,18,8,94907654,,,8,1,10.26599/NR.2025.94907654,,"[Li, Jiaxin; Sun, Caiting; Fan, Haiyang; Dong, Feilong; Lv, Zunhang; Liu, Rui; Yang, Wenxiu; Wang, Bo] Beijing Inst Technol, Sch Chem & Chem Engn, Key Lab Cluster Sci,Minist Educ, Beijing Key Lab Photoelect Electrophoton Convers, Beijing 100081, Peoples R China; [Li, Jiaxin; Sun, Caiting; Fan, Haiyang; Dong, Feilong; Lv, Zunhang; Liu, Rui; Yang, Wenxiu; Wang, Bo] Beijing Inst Technol, Adv Technol Res Inst Jinan, Sch Interdisciplinary Sci, Beijing 100081, Peoples R China; [Li, Jiaxin] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China",,"Precise engineering of single-atom catalysts (SACs) with hierarchical porous structures and optimized mass/charge transfer properties is crucial for advancing oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). Herein, we present a novel molten salt-assisted pyrolysis strategy that employs a ""dimensional reduction and pore creation"" approach to exfoliate threedimensional (3D)-metal-organic frameworks (MOFs) into three-dimensional porous carbon nanosheets doped with single-atom Fe, resulting in Fe SACs supported on hierarchical porous nitrogen-doped carbon (Fe SA@HPNC). The molten salt treatment simultaneously induces exfoliation and etching, resulting in a hierarchical porous structure with both micropores and mesopores, and a remarkably high specific surface area of 919.5 m2<middle dot>g-1. The twodimensional nanosheet structure enhances the anchoring of Fe by exposing more surface micropores, which reduces Fe being deeply buried in internal micropores and improves oxygen accessibility and mass/charge transfer efficiency. The Fe SA@HPNC demonstrates excellent ORR performance with a half-wave potential of 0.90 V and a kinetic current density of 19.9 mA<middle dot>cm-2. When applied as the cathode in PEMFCs, the Fe SA@HPNC-based cell achieves a remarkable maximum power density of 900 mW<middle dot>cm-2. Distribution of relaxation times analysis further reveals that the exfoliated catalyst exhibits enhanced ORR kinetics and reduced oxygen transport resistance.",metal organic frameworks; oxygen reduction reaction; oxygen mass transfer; proton exchange membrane fuel cell; zinc air battery,FE,metal organic frameworks;oxygen reduction reaction;oxygen mass transfer;proton exchange membrane fuel cell;zinc air battery;FE,yangwx19@bit.edu.cn,,"B605D, XUE YAN BUILDING, BEIJING, 100084, PEOPLES R CHINA",,,,TSINGHUA UNIV PRESS,1998-0124,,,,English,NANO RES,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:001551926100014,2-s2.0-105015076118,China,bit.edu.cn,Beijing Inst Technol,"Beijing Inst Technol, China","Li, Jiaxin; Sun, Caiting; Fan, Haiyang; Dong, Feilong; Lv, Zunhang; Liu, Rui; Yang, Wenxiu; Wang, Bo"
"Li, H., Yang, Y., Zhang, J., Wen, Q., Fang, J., Liu, Y., Zhai, T.",Boosting CeO2/Co3O4 Heterojunctions Acidic Oxygen Evolution via Promoting OH Coverage,2023,ACS Applied Energy Materials,6,17,,8949,8956,,15,10.1021/acsaem.3c01631,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85169014615&doi=10.1021%2Facsaem.3c01631&partnerID=40&md5=96948c5e3e6ea3410f7c9cbab08e8e98,"Huazhong University of Science and Technology, Wuhan, Hubei, China; School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China","Li, Huang Jing Wei, Huazhong University of Science and Technology, Wuhan, Hubei, China; Yang, Yang, Huazhong University of Science and Technology, Wuhan, Hubei, China; Zhang, Junjie, Huazhong University of Science and Technology, Wuhan, Hubei, China; Wen, Qunlei, Huazhong University of Science and Technology, Wuhan, Hubei, China; Fang, Jiakun, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China; Liu, Youwen, Huazhong University of Science and Technology, Wuhan, Hubei, China; Zhai, Tianyou, Huazhong University of Science and Technology, Wuhan, Hubei, China","Developing nonprecious metal catalysts with excellent activity and durability for the oxygen evolution reaction (OER) in acidic media is essential for the production of hydrogen from proton-exchange membranes (PEMs). However, challenges remain due to the lack of activity and stability of catalysts for OERs. Here, we report that a carbon-coated CeO<inf>2</inf>/Co<inf>3</inf>O<inf>4</inf> heterojunction has a lower overpotential of 425 mV at 10 mA cm-2 than CeO<inf>2</inf>/Co<inf>3</inf>O<inf>4</inf> (489 mV), and Co<inf>3</inf>O<inf>4</inf> (506 mV). Moreover, stability is observed for 50 h. Using in situ electrochemical impedance spectroscopy, the carbon cladding was found to increase the OH coverage and prevent acid corrosion, thereby improving the activity and stability. This provides a pathway for designing nonprecious acidic OER catalysts. © 2023 American Chemical Society",acid OER; CeO2; Co3O4; heterojunction; OH coverage,Carbon; Catalyst activity; Corrosion prevention; Electrochemical impedance spectroscopy; Heterojunctions; Hydrogen production; Oxygen; Proton exchange membrane fuel cells (PEMFC); A-carbon; Acid oxygen evolution reaction; Acidic media; Non-precious metal catalysts; Nonprecious-metal catalysts; OH coverage; Oxygen evolution; Production of hydrogen; Proton exchange membranes; ]+ catalyst; Cerium oxide,acid OER;CeO2;Co3O4;heterojunction;OH coverage;Carbon;Catalyst activity;Corrosion prevention;Electrochemical impedance spectroscopy;Heterojunctions;Hydrogen production;Oxygen;Proton exchange membrane fuel cells (PEMFC);A-carbon;Acid oxygen evolution reaction;Acidic media;Non-precious metal catalysts;Nonprecious-metal catalysts;Oxygen evolution;Production of hydrogen;Proton exchange membranes;]+ catalyst;Cerium oxide,"Y. Liu; State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China; email: ywliu@hust.edu.cn",,,,,,American Chemical Society,,,,,English,ACS Appl. Ener. Mat.,Article,Scopus,,2-s2.0-85169014615,,China,hust.edu.cn,,,"Li, H.; Yang, Y.; Zhang, J.; Wen, Q.; Fang, J.; Liu, Y.; Zhai, T."
"Zhang, X.R., Xu, X.M., Yao, S.X., Hao, C., Pan, C., Xiang, X., Tian, Z.Q., Shen, P.K., Shao, Z.P., Jiang, S.P.",Boosting Electrocatalytic Activity of Single Atom Catalysts Supported on Nitrogen-Doped Carbon through N Coordination Environment Engineering,2022,SMALL,18,10,2105329,,,16,134,10.1002/smll.202105329,,"[Zhang, Xiaoran; Yao, Sixian; Hao, Chao; Pan, Can; Xiang, Xue; Tian, Zhi Qun; Shen, Pei Kang] Guangxi Univ, Collaborat Innovat Ctr Sustainable Energy Mat, Sch Phys Sci & Technol,Minist Educ, Guangxi Key Lab Electrochem Energy Mat,Key Lab Ne, Nanning 530004, Peoples R China; [Zhang, Xiaoran; Xu, Xiaomin; Shao, Zongping; Jiang, San Ping] Curtin Univ, WA Sch Mines Minerals Energy & Chem Engn, Perth, WA 6102, Australia",,"Nonprecious group metal (NPGM)-based single atom catalysts (SACs) hold a great potential in electrocatalysis and dopant engineering has been extensively exploited to boost their catalytic activity, while the coordination environment of dopant, which also significantly affects the electronic structure of SACs, and consequently their electrocatalytic performance, have been largely ignored. Here, by adopting a precursor modulation strategy, the authors successfully synthesize single cobalt atom catalysts embedded in nitrogen-doped carbon, Co-N/C, with similar overall Co and N concentrations but different N types, that is, pyridinic N (N-P), graphitic N (N-G), and pyrrolic N (N-PY). Co-N/C with the Co-N-4 moieties coordinated with N-G displays far superior activity for oxygen reduction (ORR) and evolution reactions, and superior activity and stability in both zinc-air batteries and proton exchange membrane fuel cells. Density functional theory calculation indicates that coordinated N species in particular N-G functions as electron donors to the Co core of Co-N-4 active sites, leading to the downshift of d-band center of Co-N-4 and weakening the binding energies of the intermediates on Co-N-4 sites, thus, significantly promoting catalytic kinetics and thermodynamics for ORR in a full pH range condition.",N coordination environment engineering; oxygen reduction reactions; polymer electrolyte membrane fuel cells; single atom catalysts; Zn-air batteries,OXYGEN REDUCTION REACTION; PROTON-EXCHANGE MEMBRANE; METAL-CATALYSTS; ULTRA-LOW; SITES; PERFORMANCE; GRAPHENE; NANOTUBES; DESIGN; POLYANILINE,N coordination environment engineering;oxygen reduction reactions;polymer electrolyte membrane fuel cells;single atom catalysts;Zn-air batteries;OXYGEN REDUCTION REACTION;PROTON-EXCHANGE MEMBRANE;METAL-CATALYSTS;ULTRA-LOW;SITES;PERFORMANCE;GRAPHENE;NANOTUBES;DESIGN;POLYANILINE,tianzhiqun@gxu.edu.cn; Zongping.shao@curtin.edu.au; s.jiang@curtin.edu.au,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1613-6810,,,35023622,English,SMALL,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000742021800001,2-s2.0-85122756226,China;Australia,gxu.edu.cn,Guangxi Univ;Curtin Univ,"Guangxi Univ, China;Curtin Univ, Australia","Zhang, Xiaoran; Xu, Xiaomin; Yao, Sixian; Hao, Chao; Pan, Can; Xiang, Xue; Tian, Zhi Qun; Shen, Pei Kang; Shao, Zongping; Jiang, San Ping"
"Yang, Z.K., Wang, Y., Zhu, M.Z., Li, Z.J., Chen, W.X., Wei, W.C., Yuan, T.W., Qu, Y.T., Xu, Q., Zhao, C.M., Wang, X., Li, P., Li, Y.F., Wu, Y., Li, Y.D.",Boosting Oxygen Reduction Catalysis with Fe-N4 Sites Decorated Porous Carbons toward Fuel Cells,2019,ACS CATALYSIS,9,3,,2158,2163,11,354,10.1021/acscatal.8b04381,,"[Yang, Zhengkun; Zhu, Mengzhao; Li, Zhijun; Wei, Weichen; Qu, Yunteng; Zhao, Changming; Wang, Xin; Li, Peng; Wu, Yuen] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Sch Chem & Mat Sci, Hefei 230026, Anhui, Peoples R China; [Li, Yadong] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China; [Wang, Yu; Li, Yafei] Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Nanjing 210023, Jiangsu, Peoples R China; [Chen, Wenxing] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing Key Lab Construct Tailorable Adv Funct Ma, Beijing 100081, Peoples R China; [Xu, Qian] NSRL, Hefei 230026, Anhui, Peoples R China; [Yuan, Tongwei] Shanghai Univ, Coll Sci, Dept Chem, NEST Lab, Shanghai 200444, Peoples R China",,"It is highly desired but remains a great challenge to develop nonprecious metal single-atom catalysts to supersede the Pt-based material for oxygen reduction reaction (ORR). Herein, we report a porous nitrogen-doped carbon matrix catalyst with 3.5 wt % single Fe atoms (Fe SAs/N-C) through a versatile molecules-confined pyrolysis strategy. In 0.1 M KOH condition, the Fe SAs/N-C catalyst possesses a half-wave potential of 0.91 V vs RHE. In a more challenging acidic solution, Fe SAs/N-C catalyst also offers good ORR activity, comparable with the commercial Pt/C. Impressively, Fe SAs/N-C shows extremely high stability both in alkaline and acidic media. In addition, this Fe SAs/N-C-derived Zn-air battery and proton exchange membrane fuel cells (PEMFCs) exhibit high performance. This work opens an avenue for designing and preparing single-atom catalysts.",single-atom Fe; porous carbons; electrocatalysis; oxygen reduction reaction; Zn-air battery; fuel cells,FE-N/C; ELECTROCATALYSTS; PERFORMANCE; NANOSHEETS; NANOWIRES; NITROGEN,single-atom Fe;porous carbons;electrocatalysis;oxygen reduction reaction;Zn-air battery;fuel cells;FE-N/C;ELECTROCATALYSTS;PERFORMANCE;NANOSHEETS;NANOWIRES;NITROGEN,liyafei.abc@gmail.com; yuenwu@ustc.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2155-5435,,,,English,ACS CATAL,Article,WoS,Chemistry,WOS:000460600600049,2-s2.0-85061489538,China,gmail.com,Univ Sci & Technol China;Tsinghua Univ;Nanjing Normal Univ;Beijing Inst Technol;NSRL;Shanghai Univ,"Univ Sci & Technol China, China;Tsinghua Univ, China;Nanjing Normal Univ, China;Beijing Inst Technol, China;NSRL, China;Shanghai Univ, China","Yang, Zhengkun; Wang, Yu; Zhu, Mengzhao; Li, Zhijun; Chen, Wenxing; Wei, Weichen; Yuan, Tongwei; Qu, Yunteng; Xu, Qian; Zhao, Changming; Wang, Xin; Li, Peng; Li, Yafei; Wu, Yuen; Li, Yadong"
"Qiao, M., A. Ferrero, G.A., Fernandez Velasco, L., Vern Hor, W., Yang, Y., Luo, H., Lodewyckx, P., Fuertes, A.B., Sevilla, M., Titirici, M.M.",Boosting the Oxygen Reduction Electrocatalytic Performance of Nonprecious Metal Nanocarbons via Triple Boundary Engineering Using Protic Ionic Liquids,2019,ACS Applied Materials and Interfaces,11,12,,11298,11305,,39,10.1021/acsami.8b18375,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85063547870&doi=10.1021%2Facsami.8b18375&partnerID=40&md5=17cac499fea71d4b164af49bea709792,"Queen Mary University of London, London, United Kingdom; Materials Research Institute, Queen Mary University of London, London, United Kingdom; CSIC - Instituto de Ciencia y Tecnología del Carbono (INCAR), Oviedo, Asturias, Spain; Department of Chemistry, Koninklijke Militaire School - Ecole Royale Militaire, Brussels, BRU, Belgium; South Kensington Campus, Imperial College London, London, United Kingdom","Qiao, Mo, Queen Mary University of London, London, United Kingdom, South Kensington Campus, Imperial College London, London, United Kingdom; A. Ferrero, Guillermo, CSIC - Instituto de Ciencia y Tecnología del Carbono (INCAR), Oviedo, Asturias, Spain; Fernandez Velasco, Leticia Fernández, Department of Chemistry, Koninklijke Militaire School - Ecole Royale Militaire, Brussels, BRU, Belgium; Vern Hor, Wei, Queen Mary University of London, London, United Kingdom; Yang, Yan, Queen Mary University of London, London, United Kingdom; Luo, Hui, Queen Mary University of London, London, United Kingdom; Lodewyckx, Peter, Department of Chemistry, Koninklijke Militaire School - Ecole Royale Militaire, Brussels, BRU, Belgium; Fuertes, A. B., CSIC - Instituto de Ciencia y Tecnología del Carbono (INCAR), Oviedo, Asturias, Spain; Sevilla, Marta, CSIC - Instituto de Ciencia y Tecnología del Carbono (INCAR), Oviedo, Asturias, Spain; Titirici, Maria Magdalena, Queen Mary University of London, London, United Kingdom, Materials Research Institute, Queen Mary University of London, London, United Kingdom, South Kensington Campus, Imperial College London, London, United Kingdom","The oxygen reduction reaction (ORR) in aqueous media plays a critical role in sustainable and clean energy technologies such as polymer electrolyte membrane and alkaline fuel cells. In this work, we present a new concept to improve the ORR performance by engineering the interface reaction at the electrocatalyst/electrolyte/oxygen triple-phase boundary using a protic and hydrophobic ionic liquid and demonstrate the wide and general applicability of this concept to several Pt-free catalysts. Two catalysts, Fe-N codoped and metal-free N-doped carbon electrocatalysts, are used as a proof of concept. The ionic liquid layer grafted at the nanocarbon surface creates a water-equilibrated secondary reaction medium with a higher O <inf>2</inf> affinity toward oxygen adsorption, promoting the diffusion toward the catalytic active site, while its protic character provides sufficient H + /H <inf>3</inf> O + conductivity, and the hydrophobic nature prevents the resulting reaction product water from accumulating and blocking the interface. Our strategy brings obvious improvements in the ORR performance in both acid and alkaline electrolytes, while the catalytic activity of FeNC-nanocarbon outperforms commercial Pt-C in alkaline electrolytes. We believe that this research will pave new routes toward the development of high-performance ORR catalysts free of noble metals via careful interface engineering at the triple point. © 2019 American Chemical Society.",electrocatalysis; interface reaction; non-precious metal catalysts; oxygen reduction reaction; triple phase boundary,Alkaline fuel cells; Catalyst activity; Doping (additives); Electrocatalysis; Electrocatalysts; Electrolytic reduction; Fuel cells; Gas adsorption; Hydrophobicity; Ionic liquids; Iron compounds; Oxygen; Phase interfaces; Platinum compounds; Polyelectrolytes; Precious metals; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Clean energy technology; Electrocatalytic performance; Hydrophobic ionic liquid; Interface reactions; Non-precious metal catalysts; Oxygen reduction reaction; Polymer electrolyte membranes; Triple phase boundary; Nitrogen compounds,electrocatalysis;interface reaction;non-precious metal catalysts;oxygen reduction reaction;triple phase boundary;Alkaline fuel cells;Catalyst activity;Doping (additives);Electrocatalysts;Electrolytic reduction;Fuel cells;Gas adsorption;Hydrophobicity;Ionic liquids;Iron compounds;Oxygen;Phase interfaces;Platinum compounds;Polyelectrolytes;Precious metals;Proton exchange membrane fuel cells (PEMFC);Solid electrolytes;Clean energy technology;Electrocatalytic performance;Hydrophobic ionic liquid;Interface reactions;Polymer electrolyte membranes;Nitrogen compounds,"M.-M. Titirici; School of Engineering and Materials Science, Queen Mary University of London, London, E1 4NS, United Kingdom; email: m.titirici@imperial.ac.uk",,,,,,American Chemical Society service@acs.org,19448244,,,30817109,English,ACS Appl. Mater. Interfaces,Article,Scopus,,2-s2.0-85063547870,,United Kingdom;Spain;Belgium,imperial.ac.uk,,,"Qiao, M.; A. Ferrero, G.A.; Fernandez Velasco, L.; Vern Hor, W.; Yang, Y.; Luo, H.; Lodewyckx, P.; Fuertes, A.B.; Sevilla, M.; Titirici, M.-M."
"Liu, W., Liu, Q., Wan, X., Shui, J.",Boosting the Oxygen Reduction Performance of Fe–N–C Catalyst Using Zeolite as an Oxygen Reservoir,2024,Transactions of Tianjin University,30,5,,428,435,,4,10.1007/s12209-024-00409-x,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85200973189&doi=10.1007%2Fs12209-024-00409-x&partnerID=40&md5=ad275e5c581509c68e1264ef10cf5207,"Beihang University, Beijing, China; Beihang University, Beijing, China; Tianmushan Laboratory, Hangzhou, Zhejiang, China","Liu, Weihao, Beihang University, Beijing, China; Liu, Qingtao, Beihang University, Beijing, China; Wan, Xin, Beihang University, Beijing, China, Beihang University, Beijing, China; Shui, Jianglan, Beihang University, Beijing, China, Tianmushan Laboratory, Hangzhou, Zhejiang, China","Non-precious metal electrocatalysts (such as Fe–N–C materials) for the oxygen (O<inf>2</inf>) reduction reaction demand a high catalyst loading in fuel cell devices to achieve workable performance. However, the extremely low solubility of O<inf>2</inf> in water creates severe mass transport resistance in the thick catalyst layer of Fe–N–C catalysts. Here, we introduce silicalite-1 nanocrystals with hydrophobic cavities as sustainable O<inf>2</inf> reservoirs to overcome the mass transport issue of Fe–N–C catalysts. The extra O<inf>2</inf> supply to the adjacent catalysts significantly alleviated the negative effects of the severe mass transport resistance. The hybrid catalyst (Fe–N–C@silicalite-1) achieved a higher limiting current density than Fe–N–C in the half-cell test. In the H<inf>2</inf>–O<inf>2</inf> and H<inf>2</inf>–air proton exchange membrane fuel cells, Fe–N–C@silicalite-1 exhibited a 16.3% and 20.2% increase in peak power density compared with Fe–N–C, respectively. The O<inf>2</inf>-concentrating additive provides an effective approach for improving the mass transport imposed by the low solubility of O<inf>2</inf> in water. © The Author(s) 2024.",Fe–N–C catalyst; Fuel cell; Mass transport; Oxygen reduction reaction; Oxygen reservoir,Electrocatalysts; Electrolytic reduction; Hydrophobicity; Proton exchange membrane fuel cells (PEMFC); Reservoirs (water); Silicate minerals; Solubility; Zeolites; Fe–N–C catalyst; Mass-transport resistance; Non-precious metals; Oxygen Reduction; Oxygen reduction reaction; Oxygen reservoir; Performance; Reduction reaction; Silicalite-1; ]+ catalyst; Oxygen,Fe–N–C catalyst;Fuel cell;Mass transport;Oxygen reduction reaction;Oxygen reservoir;Electrocatalysts;Electrolytic reduction;Hydrophobicity;Proton exchange membrane fuel cells (PEMFC);Reservoirs (water);Silicate minerals;Solubility;Zeolites;Mass-transport resistance;Non-precious metals;Oxygen Reduction;Performance;Reduction reaction;Silicalite-1;]+ catalyst;Oxygen,"X. Wan; School of Materials Science and Engineering, Beihang University, Beijing, 100191, China; email: wanxin@buaa.edu.cn; J. Shui; School of Materials Science and Engineering, Beihang University, Beijing, 100191, China; email: shuijianglan@buaa.edu.cn",,,,,,Tianjin University,10064982,,TTUNE,,English,Trans. Tianjin Univ.,Article,Scopus,,2-s2.0-85200973189,,China,buaa.edu.cn,,,"Liu, W.; Liu, Q.; Wan, X.; Shui, J."
"Guo, L., Wan, X., Liu, X., Shang, J., Yu, R., Shui, J.",Boosting the Performance and Durability of Fe–N–C Fuel Cell Catalysts via Integrating Mo2C Clusters,2025,Small Methods,9,5,2401270,,,,4,10.1002/smtd.202401270,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85206432833&doi=10.1002%2Fsmtd.202401270&partnerID=40&md5=3cee9304f080b0382eae3077e704504a,"Tianmushan Laboratory, Hangzhou, Zhejiang, China; Beihang University, Beijing, China","Guo, Liming, Tianmushan Laboratory, Hangzhou, Zhejiang, China, Beihang University, Beijing, China; Wan, Xin, Beihang University, Beijing, China; Liu, Xiaofang, Beihang University, Beijing, China; Shang, Jiaxiang, Beihang University, Beijing, China; Yu, Ronghai, Beihang University, Beijing, China; Shui, Jianglan, Tianmushan Laboratory, Hangzhou, Zhejiang, China, Beihang University, Beijing, China","Carbon-supported nitrogen-coordinated iron single-atom (Fe–N–C) catalysts have been regarded among the most promising platinum-group-metal-free catalysts for oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). Nevertheless, their limited intrinsic activity and unsatisfactory stability have hindered their practical applications. Here, it is reported that the integration of Mo<inf>2</inf>C clusters effectively enhances the ORR activity and stability of Fe–N–C catalysts. The composite catalyst of Fe single atoms and Mo<inf>2</inf>C clusters co-embedded on nitrogen-doped carbon (Fe<inf>SA</inf>/Mo<inf>2</inf>C–NC) exhibits an excellent ORR activity with a half-wave potential of 0.82 V in acidic media and a high peak power density of 0.5 W cm−2 in an H<inf>2</inf>–air PEMFC. Moreover, improved stability is achieved with nearly no decay under H<inf>2</inf>–air conditions for 80 h at 0.4 V. Experiments with theoretical calculations elucidate that the etching effect of the phosphomolybdic acid precursor optimizes the pore size distribution of the composite catalyst, thereby exposing more active sites. The Mo<inf>2</inf>C clusters modulate the electronic configuration of the Fe–N<inf>4</inf> sites, optimizing adsorption energy for ORR intermediates and strengthening the Fe–N bond to mitigate demetalation. This work provides valuable insights into the construction of single-atom/nanoaggregate hybrid catalysts for efficient energy-related applications. © 2024 Wiley-VCH GmbH.",composite catalysts; demetalation; Fe–N–C; Mo2C clusters; PEMFCs,Bioremediation; Decay (organic); Oxygen reduction reaction; Photoionization; Reaction intermediates; Composite catalysts; Demetalation; Fe–N–C; Mo2C cluster; Performance; Proton-exchange membranes fuel cells; Reaction activity; Single-atoms; ]+ catalyst; Electrolytic reduction; carbon; iron; nitrogen; oxygen; platinum; proton; adsorption; article; atom; catalyst; controlled study; fuel; intrinsic activity; membrane; pharmaceutics; pore size distribution,composite catalysts;demetalation;Fe–N–C;Mo2C clusters;PEMFCs;Bioremediation;Decay (organic);Oxygen reduction reaction;Photoionization;Reaction intermediates;Mo2C cluster;Performance;Proton-exchange membranes fuel cells;Reaction activity;Single-atoms;]+ catalyst;Electrolytic reduction;carbon;iron;nitrogen;oxygen;platinum;proton;adsorption;article;atom;catalyst;controlled study;fuel;intrinsic activity;membrane;pharmaceutics;pore size distribution,"J. Shui; Tianmushan Laboratory, Hangzhou, 311115, China; email: shuijianglan@buaa.edu.cn; X. Wan; School of Materials Science and Engineering, Beihang University, Beijing, 100191, China; email: wanxin@buaa.edu.cn; X. Liu; School of Materials Science and Engineering, Beihang University, Beijing, 100191, China; email: liuxf05@buaa.edu.cn",,,,,,John Wiley and Sons Inc,,,,39420830,English,Small Methods,Article,Scopus,,2-s2.0-85206432833,,China,buaa.edu.cn,,,"Guo, L.; Wan, X.; Liu, X.; Shang, J.; Yu, R.; Shui, J."
"Li, Y.R., Yin, S.H., Chen, L., Cheng, X.Y., Wang, C.T., Jiang, Y.X., Sun, S.G.",Boost the Utilization of Dense FeN4 Sites for High-Performance Proton Exchange Membrane Fuel Cells,2024,ENERGY & ENVIRONMENTAL MATERIALS,7,3,,,,8,24,10.1002/eem2.12611,,"[Li, Yanrong; Yin, Shuhu; Chen, Long; Cheng, Xiaoyang; Jiang, Yanxia; Sun, Shigang] Xiamen Univ, Coll Chem & Chem Engn & Discipline Intelligent I, Engn Res Ctr Electrochem Technol, Minist Educ,State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China; [Wang, Chongtai] Hainan Normal Univ, Coll Chem & Chem Engn, Key Lab Electrochem Energy Storage & Energy Conve, Haikou 571158, Peoples R China",,"Iron-nitrogen-carbon (Fe-N-C) catalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs) have seriously been hindered by their poor ORR performance of Fe-N-C due to the low active site density (SD) and site utilization. Herein, we reported a melamine-assisted vapor deposition approach to overcome these hindrances. The melamine not only compensates for the loss of nitrogen caused by high-temperature pyrolysis but also effectively etches the carbon substrate, increasing the external surface area and mesoporous porosity of the carbon substrate. These can provide more useful area for subsequent vapor deposition on active sites. The prepared 0.20Mela-FeNC catalyst shows a fourfold higher SD value and site utilization than the FeNC without the treatment of melamine. As a result, 0.20Mela-FeNC catalyst exhibits a high ORR activity with a half-wave potential (E-1/2) of 0.861 V and 12-fold higher ORR mass activity than the FeNC in acidic media. As the cathode in a H-2-O-2 PEMFCs, 0.20Mela-FeNC catalyst demonstrates a high peak power density of 1.30 W cm(-2), outstripping most of the reported Fe-N-C catalysts. The developed melamine-assisted vapor deposition approach for boosting the SD and utilization of Fe-N-C catalysts offers a new insight into high-performance ORR electrocatalysts.",fuel cells; melamine; oxygen reduction reaction; site density; utilization,N-C ELECTROCATALYST; OXYGEN REDUCTION; ACTIVE-SITES; CARBON; IRON; CATALYSTS; POLYMER; GRAPHENE,fuel cells;melamine;oxygen reduction reaction;site density;utilization;N-C ELECTROCATALYST;OXYGEN REDUCTION;ACTIVE-SITES;CARBON;IRON;CATALYSTS;POLYMER;GRAPHENE,yxjiang@xmu.edu.cn; sgsun@xmu.edu.cn,,"111 RIVER ST, HOBOKEN 07030-5774, NJ USA",,,,WILEY,,,,,English,ENERGY ENVIRON MATER,Article,WoS,Materials Science,WOS:000961785400001,2-s2.0-85151458499,China,xmu.edu.cn,Xiamen Univ;Hainan Normal Univ,"Xiamen Univ, China;Hainan Normal Univ, China","Li, Yanrong; Yin, Shuhu; Chen, Long; Cheng, Xiaoyang; Wang, Chongtai; Jiang, Yanxia; Sun, Shigang"
"Liu, S., Meyer, Q., Xu, D., Cheng, Y., Osmieri, L., Li, X.H., Zhao, C.",Breaking the Activity and Stability Trade-Off of Platinum-Free Catalysts for the Oxygen Reduction Reaction in Hydrogen Fuel Cells,2025,ACS Nano,19,21,,19524,19551,,15,10.1021/acsnano.5c03610,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105005507081&doi=10.1021%2Facsnano.5c03610&partnerID=40&md5=dde22c687fc4271be835d2117f276dc7,"School of Chemistry, UNSW Sydney, Sydney, NSW, Australia; School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China; Central South University, Changsha, Hunan, China; Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States","Liu, Shiyang, School of Chemistry, UNSW Sydney, Sydney, NSW, Australia; Meyer, Q., School of Chemistry, UNSW Sydney, Sydney, NSW, Australia; Xu, Dong, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China; Cheng, Yi, Central South University, Changsha, Hunan, China; Osmieri, Luigi, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Li, Xinhao, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China; Zhao, Chuan, School of Chemistry, UNSW Sydney, Sydney, NSW, Australia","Hydrogen fuel cells, which use hydrogen as fuel to generate electricity, hold great promises as future energy conversion devices for heavy-duty transport, due to their zero CO<inf>2</inf> emissions, high energy conversion efficiency, and high power density. However, the adoption of hydrogen fuel cells has been slow due to their reliance on large amounts of costly and scarce platinum (Pt) for the oxygen reduction reaction. The replacement of Pt with Earth-abundant transition metals such as Fe, Co, Mn, and Sn with oxygen reduction reaction affinity has thus been a holy grail of electrocatalysis research. Pt-free catalysts must combine both high power density and high stability in hydrogen fuel cells to be considered viable alternatives to Pt. Despite promising progress on both fronts, a trade-off has emerged: Pt-free catalysts either achieve high power densities (≥1.5 W cm-2) but suffer from low stabilities (≥70% loss after 25 h) or more recently demonstrate improved stability (≤25% loss after 150 h), while delivering considerably lower power densities (<1 W cm-2) in hydrogen fuel cells. Herein, we summarize the recent progress in the synthesis of high power density M-N-C catalysts for hydrogen fuel cells and highlight the critical importance of uncovering the underlying mechanisms using operando methods. We then discuss the primary causes of catalyst degradation in hydrogen fuel cells and the most promising strategies to enhance the stability of the M-N-C catalysts. Finally, a roadmap is proposed to overcome the activity stability trade-off for Pt-free catalysts in hydrogen fuel cells. © 2025 American Chemical Society.",Carbon corrosion; Electrocatalysts; High active site density; Hydrogen peroxide attack; Metal leaching; Metal−organic frameworks; Oxygen reduction reaction; Proton exchange membrane fuel cell; Pyridinic sites,Alkali metals; Cobalt; Combustion synthesis; Copper; Decay (organic); Electrolysis; Iron; Manganese; Platinum; Refractory metals; Active site density; Carbon corrosion; High active site density; Hydrogen peroxide attack; Metal leaching; Metalorganic frameworks (MOFs); Oxygen reduction reaction; Proton-exchange membranes fuel cells; Pyridinic; Pyridinic site; Electrolytic reduction; carbon; hydrogen; hydrogen peroxide; metal; metal organic framework; oxygen; platinum; proton; carbon dioxide emission; catalyst; controlled study; corrosion; degradation; electricity; electrocatalysis; energy conversion; fuel; leaching; membrane; pharmaceutics; reduction (chemistry); review; synthesis,Carbon corrosion;Electrocatalysts;High active site density;Hydrogen peroxide attack;Metal leaching;Metal−organic frameworks;Oxygen reduction reaction;Proton exchange membrane fuel cell;Pyridinic sites;Alkali metals;Cobalt;Combustion synthesis;Copper;Decay (organic);Electrolysis;Iron;Manganese;Platinum;Refractory metals;Active site density;Metalorganic frameworks (MOFs);Proton-exchange membranes fuel cells;Pyridinic;Pyridinic site;Electrolytic reduction;carbon;hydrogen;hydrogen peroxide;metal;metal organic framework;oxygen;proton;carbon dioxide emission;catalyst;controlled study;corrosion;degradation;electricity;electrocatalysis;energy conversion;fuel;leaching;membrane;pharmaceutics;reduction (chemistry);review;synthesis,"C. Zhao; School of Chemistry, Faculty of Science, University of New South Wales, Sydney, 2052, Australia; email: chuan.zhao@unsw.edu.au",,,,,,American Chemical Society,19360851,,,40388711,English,ACS Nano,Review,Scopus,,2-s2.0-105005507081,,Australia;China;United States,unsw.edu.au,,,"Liu, S.; Meyer, Q.; Xu, D.; Cheng, Y.; Osmieri, L.; Li, X.-H.; Zhao, C."
"Luo, Z., Zhou, T., Guan, Y., Zhang, L., Zhang, Q., He, C., Sun, X., Ren, X.",Building Atomic Scale and Dense Fe─N4 Edge Sites of Highly Efficient Fe─N─C Oxygen Reduction Catalysts Using a Sacrificial Bimetallic Pyrolysis Strategy,2023,Small,19,48,2304750,,,,17,10.1002/smll.202304750,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85166552427&doi=10.1002%2Fsmll.202304750&partnerID=40&md5=bce8715d2409294f0e8c3ba56c6fc970,"College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, China; Department of Mechanical and Materials Engineering, Western University, London, ON, Canada","Luo, Zhaoyan, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, China; Zhou, Tingyi, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, China; Guan, Yi, Department of Mechanical and Materials Engineering, Western University, London, ON, Canada; Zhang, Lei, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, China; Zhang, Qianling, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, China; He, Chuanxin, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, China; Sun, Andy Xueliang, Department of Mechanical and Materials Engineering, Western University, London, ON, Canada; Ren, Xiangzhong, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, China","Replacing high-cost and scarce platinum (Pt) with transition metal and nitrogen co-doped carbon (M/N/C, M = Fe, Co, Mn, and so on) catalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells has largely been impeded by the unsatisfactory ORR activity of M/N/C due to the low site utilization and inferior intrinsic activity of the M─N<inf>4</inf> active center. Here, these limits are overcome by using a sacrificial bimetallic pyrolysis strategy to synthesize Fe─N─C catalyst by implanting the Cd ions in the backbone of ZIF-8, leading to exposure of inaccessible FeN<inf>4</inf> edge sites (that is, increasing active site density (SD)) and high fast mass transport at the catalyst layer of cathode. As a result, the final obtained Fe(Cd)─N─C catalyst has an active site density of 33.01 µmol g−1 (with 33.01% site utilization) over 5.8 times higher than that of Fe─N─C catalyst. Specially, the optimal catalyst delivers a high ORR performance with a half-wave potential of 0.837 (vs RHE) in a 0.1 m HClO<inf>4</inf> electrolyte, which surpasses most of Fe-based catalysts. © 2023 Wiley-VCH GmbH.","oxygen reduction; sacrificial bimetallic pyrolysis strategy; site utilization; ZIF-8, Fe/N/C catalysts","Catalyst activity; Chlorine compounds; Electrolytes; Electrolytic reduction; Iron compounds; Oxygen; Proton exchange membrane fuel cells (PEMFC); Transition metals; Active site density; Atomic scale; Bimetallics; Edge sites; Oxygen Reduction; Oxygen reduction reaction; Sacrificial bimetallic pyrolyse strategy; Site utilization; ZIF-8, fe/N/C catalyst; ]+ catalyst; Pyrolysis","oxygen reduction;sacrificial bimetallic pyrolysis strategy;site utilization;ZIF-8, Fe/N/C catalysts;Catalyst activity;Chlorine compounds;Electrolytes;Electrolytic reduction;Iron compounds;Oxygen;Proton exchange membrane fuel cells (PEMFC);Transition metals;Active site density;Atomic scale;Bimetallics;Edge sites;Oxygen reduction reaction;Sacrificial bimetallic pyrolyse strategy;ZIF-8, fe/N/C catalyst;]+ catalyst;Pyrolysis","X. Ren; College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, China; email: renxz@szu.edu.cn",,,,,,John Wiley and Sons Inc,16136810,,SMALB,37537155,English,Small,Article,Scopus,,2-s2.0-85166552427,,China;Canada,szu.edu.cn,,,"Luo, Z.; Zhou, T.; Guan, Y.; Zhang, L.; Zhang, Q.; He, C.; Sun, X.; Ren, X."
"Zhou, Y., Yu, F., Lang, Z., Nie, H., Wang, Z., Shao, M., Liu, Y., Tan, H., Li, Y., Kang, Z.",Carbon dots/PtW6O24 composite as efficient and stable electrocatalyst for hydrogen oxidation reaction in PEMFCs,2021,Chemical Engineering Journal,426,,130709,,,,38,10.1016/j.cej.2021.130709,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85107988790&doi=10.1016%2Fj.cej.2021.130709&partnerID=40&md5=1011e51fb62dd03ac469f2f2156d18cb,"Soochow University, Suzhou, Jiangsu, China; Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Taipa, Macao; Northeast Normal University, Changchun, Jilin, China","Zhou, Yunjie, Soochow University, Suzhou, Jiangsu, China; Yu, Feiyang, Northeast Normal University, Changchun, Jilin, China; Lang, Zhongling, Northeast Normal University, Changchun, Jilin, China; Nie, Haodong, Soochow University, Suzhou, Jiangsu, China; Wang, Zhenzhen, Soochow University, Suzhou, Jiangsu, China; Shao, Mingwang, Soochow University, Suzhou, Jiangsu, China; Liu, Yang, Soochow University, Suzhou, Jiangsu, China; Tan, Huaqiao, Northeast Normal University, Changchun, Jilin, China; Li, Yangguang, Northeast Normal University, Changchun, Jilin, China; Kang, Zhenhui, Soochow University, Suzhou, Jiangsu, China, Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Taipa, Macao, Northeast Normal University, Changchun, Jilin, China","Platinum (Pt) is practical available candidate for satisfying the requirements of anode catalysts in the proton exchange membrane fuel cells (PEMFCs). Totally dispersed Pt is an ideal way to minimize Pt use, and the develop of Pt-single-atom based hydrogen oxidation reaction (HOR) catalysts should be carried out in a multi-component/-function model system with a clear active site (Pt-single-atom) geometric structure. This work combines the well-defined Na<inf>6</inf>[H<inf>2</inf>PtW<inf>6</inf>O<inf>24</inf>] clusters and multi-function carbon dots (CDs) to show the highly efficient Pt-single-atom catalyst design for HOR in acid. The mass activity and exchange current density of POMs/CDs (2.18 wt% Pt) achieved 86.72 A mg<inf>pt</inf>−1 and 3.78 A mg<inf>pt</inf>−1, respectively, which were 9.5 and 14 times that of 20% Pt/C. Also, this catalyst exhibits better performance than 20% Pt/C in the test of single cell, including higher open circuit potential (OCP), higher power density and better long-time stability. In particular, CDs can effectively improve the catalytic performance of POMs by enhancing the electron acquisition ability of Pt in POMs, the conductivity of composites, the structure stability, the ability to resist toxicity and accelerating the transfer of H+ produced on POMs. © 2021 Elsevier B.V.",Carbon dots; Hydrogen oxidation reaction; Low platinum material; PEMFCs; Polyoxometalates,Atoms; Carbon; Catalyst activity; Electrocatalysts; Hydrogen; Oxidation; Anode catalysts; Carbon dots; Function modelling; Hydrogen oxidation reaction; Low platinum material; Multicomponents; Polyoxometalates; Proton-exchange membranes fuel cells; Single-atoms; ]+ catalyst; Proton exchange membrane fuel cells (PEMFC),Carbon dots;Hydrogen oxidation reaction;Low platinum material;PEMFCs;Polyoxometalates;Atoms;Carbon;Catalyst activity;Electrocatalysts;Hydrogen;Oxidation;Anode catalysts;Function modelling;Multicomponents;Proton-exchange membranes fuel cells;Single-atoms;]+ catalyst;Proton exchange membrane fuel cells (PEMFC),"Y. Liu; Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, Suzhou, 215123, China; email: yangl@suda.edu.cn",,,,,,Elsevier B.V.,13858947,,CMEJA,,English,Chem. Eng. J.,Article,Scopus,,2-s2.0-85107988790,,China;Macao,suda.edu.cn,,,"Zhou, Y.; Yu, F.; Lang, Z.; Nie, H.; Wang, Z.; Shao, M.; Liu, Y.; Tan, H.; Li, Y.; Kang, Z."
"Kicinski, W., Dyjak, S., Tokarz, W.",Carbon gel-derived Fe–N–C electrocatalysts for hydrogen-air polymer electrolyte fuel cells,2021,Journal of Power Sources,513,,230537,,,,19,10.1016/j.jpowsour.2021.230537,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85117145638&doi=10.1016%2Fj.jpowsour.2021.230537&partnerID=40&md5=f6abb6da0b53e79cc8e5880778e9e4e1,"Institute of Chemistry, Wojskowa Akademia Techniczna, Warsaw, MA, Poland; Łukasiewicz - Instytut Chemii Przemysłowej im. prof. Ignacego Mościckiego, Warsaw, MA, Poland","Kiciński, Wojciech, Institute of Chemistry, Wojskowa Akademia Techniczna, Warsaw, MA, Poland; Dyjak, Sławomir, Institute of Chemistry, Wojskowa Akademia Techniczna, Warsaw, MA, Poland; Tokarz, Wojciech, Łukasiewicz - Instytut Chemii Przemysłowej im. prof. Ignacego Mościckiego, Warsaw, MA, Poland","Phloroglucinol/2-pyrrolaldehyde porous organic polymer impregnated with FeCl<inf>3</inf> was utilized to produce pyrolyzed iron-nitrogen-carbon (Fe−N−C) electrocatalysts for oxygen reduction reaction. The influence of the iron precursor content, addition of phenanthroline and pyrolysis temperature on the final Fe−N−C catalyst properties and activity were studied. The performance of the electrocatalysts obtained was additionally studied in a H<inf>2</inf>‒air single-cell polymer electrolyte fuel cell (PEFC) with a ⁓4 mg<inf>(Fe−N−C)</inf> cm−2 cathode (5 cm2 membrane electrode assembly) and a Pt-based anode. The carbon gel-derived platinum group metal-free catalysts perform well in the PEFC achieving 0.2 W cm−2 and 0.37 A cm−2 at 0.5 V. The durability of the obtained Fe−N−C catalysts was also examined. © 2021 The Authors",Cathode catalyst layer (CCL); Fe−N−C catalyst; Oxygen reduction reaction (ORR); Platinum group metal-free (PGM-free) catalyst; Polymer electrolyte fuel cell,Carbon; Catalyst activity; Cathodes; Chlorine compounds; Electrocatalysts; Electrolysis; Electrolytic reduction; Iron; Iron compounds; Oxygen; Platinum; Polyelectrolytes; Solid electrolytes; Cathode catalyst layer; Cathode catalyst layers; Fe−N−C catalyst; Metal-free catalysts; Oxygen reduction reaction; Platinum group metal-free catalyst; Platinum group metals; Polymer electrolyte fuel cells; ]+ catalyst; Proton exchange membrane fuel cells (PEMFC),Cathode catalyst layer (CCL);Fe−N−C catalyst;Oxygen reduction reaction (ORR);Platinum group metal-free (PGM-free) catalyst;Polymer electrolyte fuel cell;Carbon;Catalyst activity;Cathodes;Chlorine compounds;Electrocatalysts;Electrolysis;Electrolytic reduction;Iron;Iron compounds;Oxygen;Platinum;Polyelectrolytes;Solid electrolytes;Cathode catalyst layer;Cathode catalyst layers;Metal-free catalysts;Oxygen reduction reaction;Platinum group metal-free catalyst;Platinum group metals;Polymer electrolyte fuel cells;]+ catalyst;Proton exchange membrane fuel cells (PEMFC),"W. Kiciński; Institute of Chemistry, Military University of Technology, Warsaw, 2 Kaliskiego Str., 00-908, Poland; email: wojciech.kicinski@wat.edu.pl",,,,,,Elsevier B.V.,03787753,0444894810,JPSOD,,English,J Power Sources,Article,Scopus,,2-s2.0-85117145638,,Poland,wat.edu.pl,,,"Kicinski, W.; Dyjak, S.; Tokarz, W."
"Chung, M.W., Choi, C.H.",Carbon nanofibers as parent materials for a graphene-based Fe-N-C catalyst for the oxygen reduction reaction,2017,Catalysis Today,295,,,125,131,,19,10.1016/j.cattod.2017.05.020,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85019169142&doi=10.1016%2Fj.cattod.2017.05.020&partnerID=40&md5=afd5ee6d07c645ddd4b42cb569bc73a9,"Fuel Cell Research Center, Korea Institute of Science and Technology, Seoul, South Korea; School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea","Chung, Min-wook, Fuel Cell Research Center, Korea Institute of Science and Technology, Seoul, South Korea; Choi, Chang Hyuck, School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea","Chemically-exfoliated graphene materials have been widely investigated for various applications. The graphene materials are typically synthesized from graphite granules, but their success as support materials of Fe-N-C electrocatalysts for the oxygen reduction reaction is highly ambiguous due to their large sheet-like morphology impeding the efficient transport of reactants/products. In this study, we synthesize a graphene-based Fe-N-C catalyst from cabon nanofibers as parent materials, which consist of stacked-cup carbon surrounded by a few graphitic walls. This Fe-N-C catalyst shows a much improved catalytic activity compared with that synthesized from graphite granules. The physical and electrochemical characterizations reveal that the carbon nanofibers are simultaneously transferred into a mixture of small graphene ribbons and flakes after chemical exfoliation and surface modification, forming a porous network structure in a fabricated electrode with a modified electronic structure. The electrocatalytic pathway, methanol-tolerance, and active site of the graphene-based Fe-N-C catalyst are also investigated. The results show that the carbon nanofibers are promising parent carbon materials for preparation of graphene-based Fe-N-C electrocatalysts. © 2017 Elsevier B.V.",Carbon nanofiber; Fe-N-C catalysts; Graphene; Non-precious metal catalysts; Oxygen reduction reaction; Polymer electrolyte membrane fuel cells,Carbon nanofibers; Catalyst activity; Catalysts; Characterization; Chemical modification; Electrocatalysts; Electrolytes; Electrolytic reduction; Electronic structure; Granulation; Graphite; Nanofibers; Oxygen; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Reduction; Surface treatment; Chemical exfoliations; Electrochemical characterizations; Exfoliated graphene; Methanol tolerance; Non-precious metal catalysts; Oxygen reduction reaction; Porous network structures; Support materials; Graphene,Carbon nanofiber;Fe-N-C catalysts;Graphene;Non-precious metal catalysts;Oxygen reduction reaction;Polymer electrolyte membrane fuel cells;Carbon nanofibers;Catalyst activity;Catalysts;Characterization;Chemical modification;Electrocatalysts;Electrolytes;Electrolytic reduction;Electronic structure;Granulation;Graphite;Nanofibers;Oxygen;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Reduction;Surface treatment;Chemical exfoliations;Electrochemical characterizations;Exfoliated graphene;Methanol tolerance;Porous network structures;Support materials,"C.H. Choi; School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, South Korea; email: chchoi@gist.ac.kr",,,,,,Elsevier B.V.,09205861,,CATTE,,English,Catal Today,Article,Scopus,,2-s2.0-85019169142,,South Korea,gist.ac.kr,,,"Chung, M.W.; Choi, C.H."
"Li, J.C., Cheng, M., Li, T., Ma, L., Ruan, X.F., Liu, D., Cheng, H.M., Liu, C., Du, D., Wei, Z.D., Lin, Y., Shao, M.",Carbon nanotube-linked hollow carbon nanospheres doped with iron and nitrogen as single-atom catalysts for the oxygen reduction reaction in acidic solutions,2019,JOURNAL OF MATERIALS CHEMISTRY A,7,24,,14478,14482,5,62,10.1039/c9ta00508k,,"[Li, Jin-Cheng; Shao, Minhua] Hong Kong Univ Sci & Technol, Fok Ying Tung Res Inst, Guangzhou 511458, Guangdong, Peoples R China; [Li, Jin-Cheng; Ruan, Xiaofan; Liu, Dong; Du, Dan; Lin, Yuehe] Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA; [Li, Jin-Cheng; Cheng, Min; Cheng, Hui-Ming; Liu, Chang] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China; [Li, Tao; Ma, Lu] Northern Illinois Univ, Dept Chem & Biochem, 1425 W Lincoln Hwy, De Kalb, IL 60115 USA; [Li, Tao] Argonne Natl Lab, Xray Sci Div, 9700 South Cass Ave, Lemont, IL 60439 USA; [Wei, Zidong] Chongqing Univ, Coll Chem & Chem Engn, Chongqing 400044, Peoples R China; [Shao, Minhua] Hong Kong Univ Sci & Technol, Dept Chem & Biol Engn, Kowloon, Clear Water Bay, Hong Kong, Peoples R China",,"Non-noble metal electrocatalysts toward the oxygen reduction reaction (ORR) are highly required to substitute expensive Pt/C as the cathode of proton exchange membrane fuel cells. However, the relatively low ORR activity of Pt-free catalysts under acidic conditions is the major issue. Herein, we engineered a three-dimensional structure consisting of atomically dispersed Fe, N-doped hollow carbon nanospheres linked by carbon nanotubes as an electrocatalyst for the ORR. Benefiting from the unique structure and high-density atomic Fe-N-x sites, this new type of electrocatalyst showed an impressive ORR half-wave potential of 0.84 V and kinetic current density of 13.1 mA cm(-2) at a potential of 0.8 V in acidic media, which was even better those of commercial Pt/C.",,EFFICIENT ELECTROCATALYSTS; SITES,EFFICIENT ELECTROCATALYSTS;SITES,cliu@imr.ac.cn; yuehe.lin@wsu.edu; kemshao@ust.hk,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000474712700010,2-s2.0-85067508481,China;United States,imr.ac.cn,Hong Kong Univ Sci & Technol;Washington State Univ;Chinese Acad Sci;Northern Illinois Univ;Argonne Natl Lab;Chongqing Univ,"Hong Kong Univ Sci & Technol, China;Washington State Univ, United States;Chinese Acad Sci, China;Northern Illinois Univ, United States;Argonne Natl Lab, United States;Chongqing Univ, China","Li, Jin-Cheng; Cheng, Min; Li, Tao; Ma, Lu; Ruan, Xiaofan; Liu, Dong; Cheng, Hui-Ming; Liu, Chang; Du, Dan; Wei, Zidong; Lin, Yuehe; Shao, Minhua"
"Chen, Y., Zhang, S., Chung-Yen Jung, J., Zhang, J.",Carbons as low-platinum catalyst supports and non-noble catalysts for polymer electrolyte fuel cells,2023,Progress in Energy and Combustion Science,98,,101101,,,,99,10.1016/j.pecs.2023.101101,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85161320440&doi=10.1016%2Fj.pecs.2023.101101&partnerID=40&md5=981e98a3d32ea4a430029c97bb941309,"Institute for Sustainable Energy, Shanghai University College of Sciences, Shanghai, China","Chen, Yizhe, Institute for Sustainable Energy, Shanghai University College of Sciences, Shanghai, China; Zhang, Shiming, Institute for Sustainable Energy, Shanghai University College of Sciences, Shanghai, China; Chung-Yen Jung, Joey Chung Yen Joey, Institute for Sustainable Energy, Shanghai University College of Sciences, Shanghai, China; Zhang, Jiujun, Institute for Sustainable Energy, Shanghai University College of Sciences, Shanghai, China","Polymer electrolyte fuel cells, including acidic proton exchange membrane fuel cells (PEMFCs) and alkaline anion exchange membrane fuel cells (AEMFCs), are the types of the most promising high-efficiency techniques for conversion hydrogen energy to electricity energy. However, the catalysts’ insufficient activity and stability toward oxygen reduction reaction (ORR) at the cathodes of these devices are still the important constraints to their performance. So far, carbon black supported platinum (Pt/C) and its alloys are still the most practical and best-performing type of catalysts. However, the scarcity of Pt is highly challenging and the high price of commercial catalyst will continue to drive up the cost of both PEMFCs and AEMFCs. Moreover, the traditional carbon black support is susceptible to corrosion especially under electrochemical operation, itself inactive for ORR and weakly binding with Pt-based nanoparticles. In this review, the advanced carbons synthesized by various template methods, including hard-template, soft-template, self-template and combined-template, are systematically evaluated as low-Pt catalyst supports and non-noble catalysts. For the templates-induced carbon-based catalysts, this review presents a comprehensive overview on the carbon supported low-Pt catalysts from aspect of composition, size and shape control as well as the non-noble carbon catalysts such as transition metal-nitrogen-carbons, metal-free carbons and defective carbons. Furthermore, this review also summarizes the applications of low/non-Pt carbon-based catalysts base on the template-induce advanced carbons at the cathodes of PEMFCs and AEMFCs. Overall, the templates-induced carbons can show some perfect attributes including ordered morphology, reasonable pore structure, high conductivity and surface area, good corrosion resistance and mechanical property, as well as strong metal–support interaction. All of these features are of particular importance for the construction of high-performance carbon-based ORR catalysts. However, some drawbacks mainly involve the removal of templates, maintenance of morphological structure, and demetalation. To address these issues, this review also summarizes some effective strategies, such as employing the easily removed hard/soft-templates, developing the advantageous self-templates, enhancing the metal–support interaction by formation of chemical binds, etc. In conclusion, this review provides an effective guide for the construction of template-induced advanced carbons and carbon-based low/non-Pt catalysts with analysis of technical challenges in the development of ORR electrocatalysts for both PEMFCs and AEMFCs, and also proposes several future research directions for overcoming the challenges towards practical applications. © 2023 Elsevier Ltd",Low-platinum catalyst supports; Non-noble catalysts; Oxygen reduction reaction; Proton and anion exchange membrane fuel cells; Templates-induced carbons,Alkaline fuel cells; Alkalinity; Carbon black; Catalyst activity; Catalyst supports; Corrosion resistance; Electrocatalysts; Electrolytic reduction; Gas fuel purification; Ion exchange membranes; Morphology; Oxygen; Platinum; Platinum alloys; Polyelectrolytes; Pore structure; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Anion-exchange membrane fuel cells; Catalysts support; Low-platinum catalyst support; Non-noble catalyst; Oxygen reduction reaction; Platinum catalysts; Polymer electrolyte fuel cells; Proton-exchange membranes fuel cells; Template-induced carbon; ]+ catalyst; Cathodes,Low-platinum catalyst supports;Non-noble catalysts;Oxygen reduction reaction;Proton and anion exchange membrane fuel cells;Templates-induced carbons;Alkaline fuel cells;Alkalinity;Carbon black;Catalyst activity;Catalyst supports;Corrosion resistance;Electrocatalysts;Electrolytic reduction;Gas fuel purification;Ion exchange membranes;Morphology;Oxygen;Platinum;Platinum alloys;Polyelectrolytes;Pore structure;Proton exchange membrane fuel cells (PEMFC);Solid electrolytes;Anion-exchange membrane fuel cells;Catalysts support;Low-platinum catalyst support;Non-noble catalyst;Platinum catalysts;Polymer electrolyte fuel cells;Proton-exchange membranes fuel cells;Template-induced carbon;]+ catalyst;Cathodes,"S. Zhang; Institute for Sustainable Energy/College of Sciences, Shanghai University, Shanghai, 200444, China; email: smzhang@shu.edu.cn; J. Zhang; Institute for Sustainable Energy/College of Sciences, Shanghai University, Shanghai, 200444, China; email: jiujun.zhang@i.shu.edu.cn",,,,,,Elsevier Ltd,03601285,,PECSD,,English,Prog. Energy Combust. Sci.,Review,Scopus,,2-s2.0-85161320440,,China,shu.edu.cn,,,"Chen, Y.; Zhang, S.; Chung-Yen Jung, J.; Zhang, J."
"Han, A., Zhang, Z.D., Yang, J.R., Wang, D.S., Li, Y.D.",Carbon-Supported Single-Atom Catalysts for Formic Acid Oxidation and Oxygen Reduction Reactions,2021,SMALL,17,16,2004500,,,15,98,10.1002/smll.202004500,,"[Han, Ali; Zhang, Zedong; Yang, Jiarui; Wang, Dingsheng; Li, Yadong] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China",,"The commercialization of fuel cells, especially for direct formic acid fuel cells (DFAFCs) and proton-exchange membrane fuel cells (PEMFCs), is significantly restrained by the high cost, poor stability, and sluggish kinetics of platinum group metals (PGM) catalysts for both the anodic formic acid oxidation reaction (FAOR) and the cathodic oxygen reduction reaction (ORR). Currently, it has confronted with challenges, including exploring highly active, cost-effective, and stable catalysts to replace PGM for DFAFCs and PEMFCs. Recently, the increasing investigation has been focused on the single-atom catalysts (SACs) to enhance the catalytic performance owing to the maximum atom utilization and highly exposed active sites. The aim of this review is to present the recent research activities on carbon supported SACs. At the beginning of the review, metal-based SACs supported on different carbon supports, and the typical characterization methods are introduced. Subsequently, recent advances in metal-based SACs for FAOR and ORR catalysis are scientifically summarized. Particularly, some representative metal-based SACs for ORR activity are further exemplified with a deeper understanding of structure-activity relationships. Finally, the challenges and opportunities of SACs are prospected, such as the mechanism understanding and commercial applications.",catalysts; fuel cells; single-atom; synthesis,GRAPHITIC LAYERS; IRON ATOMS; EFFICIENT; ALKALINE; GRAPHENE; SITES; PD; ELECTROCATALYSTS; NANOPARTICLES; COORDINATION,catalysts;fuel cells;single-atom;synthesis;GRAPHITIC LAYERS;IRON ATOMS;EFFICIENT;ALKALINE;GRAPHENE;SITES;PD;ELECTROCATALYSTS;NANOPARTICLES;COORDINATION,wangdingsheng@mail.tsinghua.edu.cn; ydli@mail.tsinghua.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1613-6810,,,33464722,English,SMALL,Review,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000608546500001,2-s2.0-85100167330,China,mail.tsinghua.edu.cn,Tsinghua Univ,"Tsinghua Univ, China","Han, Ali; Zhang, Zedong; Yang, Jiarui; Wang, Dingsheng; Li, Yadong"
"Abdelhafiz, A., Choi, J.I., Zhao, B., Cho, J., Ding, Y., Soule, L., Jang, S.S., Liu, M., Alamgir, F.M.",Catalysis Sans Catalyst Loss: The Origins of Prolonged Stability of Graphene–Metal–Graphene Sandwich Architecture for Oxygen Reduction Reactions,2023,Advanced Science,10,34,2304616,,,,5,10.1002/advs.202304616,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85174424994&doi=10.1002%2Fadvs.202304616&partnerID=40&md5=25459a9fb3dfb2174444530510bff53e,"MIT School of Engineering, Cambridge, MA, United States; College of Engineering, Atlanta, GA, United States","Abdelhafiz, Ali Ahmed, MIT School of Engineering, Cambridge, MA, United States; Choi, Jiil, College of Engineering, Atlanta, GA, United States; Zhao, Bote, College of Engineering, Atlanta, GA, United States; Cho, Jinwon, College of Engineering, Atlanta, GA, United States; Ding, Yong, College of Engineering, Atlanta, GA, United States; Soule, Luke, College of Engineering, Atlanta, GA, United States; Jang, Seungsoon, College of Engineering, Atlanta, GA, United States; Liu, Meilin, College of Engineering, Atlanta, GA, United States; Alamgir, Faisal M., College of Engineering, Atlanta, GA, United States","Over the past decades, the design of active catalysts has been the subject of intense research efforts. However, there has been significantly less deliberate emphasis on rationally designing a catalyst system with a prolonged stability. A major obstacle comes from the ambiguity behind how catalyst degrades. Several degradation mechanisms are proposed in literature, but with a lack of systematic studies, the causal relations between degradation and those proposed mechanisms remain ambiguous. Here, a systematic study of a catalyst system comprising of small particles and single atoms of Pt sandwiched between graphene layers, GR/Pt/GR, is studied to unravel the degradation mechanism of the studied electrocatalyst for oxygen reduction reaction(ORR). Catalyst suffers from atomic dissolution under ORR harsh acidic and oxidizing operation voltages. Single atoms trapped in point defects within the top graphene layer on their way hopping through toward the surface of GR/Pt/GR architecture. Trapping mechanism renders individual Pt atoms as single atom catalyst sites catalyzing ORR for thousands of cycles before washed away in the electrolyte. The GR/Pt/GR catalysts also compare favorably to state-of-the-art commercial Pt/C catalysts and demonstrates a rational design of a hybrid nanoarchitecture with a prolonged stability for thousands of operation cycles. © 2023 The Authors. Advanced Science published by Wiley-VCH GmbH.",catalyst degradation mechanism; graphene; hybrid catalyst; oxygen reduction reaction; proton exchange membrane fuel cell (PEMFC),Atoms; Degradation; Electrocatalysts; Electrolytes; Electrolytic reduction; Oxygen; Point defects; Proton exchange membrane fuel cells (PEMFC); Catalyst degradation; Catalyst degradation mechanism; Catalyst system; Degradation mechanism; Hybrid catalysts; Oxygen reduction reaction; Proton exchange membrane fuel cell; Proton-exchange membranes fuel cells; Single-atoms; ]+ catalyst; Graphene,catalyst degradation mechanism;graphene;hybrid catalyst;oxygen reduction reaction;proton exchange membrane fuel cell (PEMFC);Atoms;Degradation;Electrocatalysts;Electrolytes;Electrolytic reduction;Oxygen;Point defects;Proton exchange membrane fuel cells (PEMFC);Catalyst degradation;Catalyst system;Degradation mechanism;Hybrid catalysts;Proton exchange membrane fuel cell;Proton-exchange membranes fuel cells;Single-atoms;]+ catalyst,"A. Abdelhafiz; Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, 77 Mass Ave, 02139, United States; email: ali_m@mit.edu; S.S. Jang; School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, 771 Ferst Drive, 30332, United States; email: seungsoon@mse.gatech.edu; M. Liu; School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, 771 Ferst Drive, 30332, United States; email: meilin.liu@mse.gatech.edu; F.M. Alamgir; School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, 771 Ferst Drive, 30332, United States; email: faisal.alamgir@mse.gatech.edu",,,,,,John Wiley and Sons Inc,,,,37863808,English,Adv. Sci.,Article,Scopus,,2-s2.0-85174424994,,United States,mit.edu,,,"Abdelhafiz, A.; Choi, J.I.; Zhao, B.; Cho, J.; Ding, Y.; Soule, L.; Jang, S.S.; Liu, M.; Alamgir, F.M."
"Wang, Y.N., Wan, X., Liu, J.Y., Li, W.W., Li, Y.C., Guo, X., Liu, X.F., Shang, J.X., Shui, J.L.",Catalysis stability enhancement of Fe/Co dual-atom site via phosphorus coordination for proton exchange membrane fuel cell,2022,NANO RESEARCH,15,4,,3082,3089,8,71,10.1007/s12274-021-3966-y,,"[Wang, Yinuo; Wan, Xin; Liu, Jieyuan; Li, Wenwen; Guo, Xu; Liu, Xiaofang; Shang, Jiaxiang; Shui, Jianglan] Beihang Univ, Sch Mat Sci & Engn, Beijing 100081, Peoples R China; [Li, Yongcheng] Qinghai Univ, Qinghai Prov Engn Res Ctr High Performance Light, Qinghai Prov Key Lab New Light Alloys, Xining 810016, Peoples R China",,"Non-precious metal catalysts (NPMCs) are promising low-cost alternatives of Pt/C for oxygen reduction reaction (ORR), which however suffer from serious stability challenge in the devices of proton-exchange-membrane fuel cells (PEMFC). Different from the traditional strategies of increasing the degree of graphitization of carbon substrates and using less Fenton-reactive metals, we prove here that proper regulation of coordination anions is also an effective way to improve the stability of NPMC. N/P co-coordinated Fe-Co dual-atomic-sites are constructed on ZIF-8 derived carbon support using a molecular precursor of C34H28Cl2CoFeP2 and a "" precursor-preselected"" method. A composition of FeCoN5P1 is infered for the dual-atom active site by microscopy and spectroscopy analysis. By comparing with N-coordinated references, we investigate the effect of P-coodination on the ORR catalysis of Fe-Co dual-atom catalysts in PEMFC. The metals in FeCoN5P1 have the lower formation energy than those in the solo N-coordinated active sites of FeCoN6 and FeN4, and exhibits a much better fuel cell stability. This anion approach provides a new way to improve the stability of dual-atom catalysts.",fuel cell; oxygen reduction reaction; non-precious metal catalyst; dual atomic site; P/N coordination,TOTAL-ENERGY CALCULATIONS; ATOMICALLY DISPERSED FE; N-C ELECTROCATALYST; ACTIVE-SITES; METAL SITES; CARBON; PERFORMANCE; EFFICIENCY; NITROGEN; DESIGN,fuel cell;oxygen reduction reaction;non-precious metal catalyst;dual atomic site;P/N coordination;TOTAL-ENERGY CALCULATIONS;ATOMICALLY DISPERSED FE;N-C ELECTROCATALYST;ACTIVE-SITES;METAL SITES;CARBON;PERFORMANCE;EFFICIENCY;NITROGEN;DESIGN,shuijianglan@buaa.edu.cn,,"B605D, XUE YAN BUILDING, BEIJING, 100084, PEOPLES R CHINA",,,,TSINGHUA UNIV PRESS,1998-0124,,,,English,NANO RES,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000723502700001,2-s2.0-85120158536,China,buaa.edu.cn,Beihang Univ;Qinghai Univ,"Beihang Univ, China;Qinghai Univ, China","Wang, Yinuo; Wan, Xin; Liu, Jieyuan; Li, Wenwen; Li, Yongcheng; Guo, Xu; Liu, Xiaofang; Shang, Jiaxiang; Shui, Jianglan"
"Huang, Y., Chen, Y., Xu, M., Asset, T., Tieu, P., Gili, A., Kulkarni, D., de Andrade, V., de Carlo, F., Barnard, H.S., Doran, A., Parkinson, D.Y., Pan, X., Atanassov, P., Zenyuk, I.V.",Catalysts by pyrolysis: Direct observation of chemical and morphological transformations leading to transition metal-nitrogen-carbon materials,2021,Materials Today,47,,,53,68,,64,10.1016/j.mattod.2021.02.006,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85103704476&doi=10.1016%2Fj.mattod.2021.02.006&partnerID=40&md5=614139fd15f430fb4dbc0ab9e412f6ef,"Samueli School of Engineering, Irvine, CA, United States; Samueli School of Engineering, Irvine, CA, United States; Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, CA, United States; University of California, Irvine, Irvine, CA, United States; University of California, Irvine, Irvine, CA, United States; Fachgebiet Keramische Werkstoffe/Chair of Advanced Ceramic Materials, Technische Universität Berlin, Berlin, Germany; The Advanced Photon Source, Lemont, IL, United States; Advanced Light Source, Berkeley, Berkeley, CA, United States","Huang, Ying, Samueli School of Engineering, Irvine, CA, United States, Samueli School of Engineering, Irvine, CA, United States; Chen, Yechuan, Samueli School of Engineering, Irvine, CA, United States, Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, CA, United States; Xu, Mingjie, Samueli School of Engineering, Irvine, CA, United States, University of California, Irvine, Irvine, CA, United States; Asset, Tristan, Samueli School of Engineering, Irvine, CA, United States, Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, CA, United States; Tieu, Peter, University of California, Irvine, Irvine, CA, United States; Gili, Albert, Fachgebiet Keramische Werkstoffe/Chair of Advanced Ceramic Materials, Technische Universität Berlin, Berlin, Germany; Kulkarni, Devashish, Samueli School of Engineering, Irvine, CA, United States, Samueli School of Engineering, Irvine, CA, United States; de Andrade, Vincent Joseph, The Advanced Photon Source, Lemont, IL, United States; de Carlo, Francesco, The Advanced Photon Source, Lemont, IL, United States; Barnard, Harold S., Advanced Light Source, Berkeley, Berkeley, CA, United States; Doran, Andrew, Advanced Light Source, Berkeley, Berkeley, CA, United States; Parkinson, Dilworth Y., Advanced Light Source, Berkeley, Berkeley, CA, United States; Pan, Xiaoqing, Samueli School of Engineering, Irvine, CA, United States, University of California, Irvine, Irvine, CA, United States; Atanassov, Plamen B., Samueli School of Engineering, Irvine, CA, United States, Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, CA, United States, University of California, Irvine, Irvine, CA, United States; Zenyuk, Iryna V., Samueli School of Engineering, Irvine, CA, United States, Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, CA, United States","Transition metal-nitrogen-carbon materials (M-N-C catalysts) are promising electrocatalysts in polymer electrolyte fuel cells (PEFCs) and electrolyzer applications. High temperature treatment in inert atmosphere (pyrolysis) is the essential, most common method for the synthesis of M-N-C catalysts and critical to achieve high electrocatalytic activity and electronic conductivity. To this day, despite many uses and successful implementations in materials manufacturing, pyrolysis has been an entirely empirical technology, with process control and optimization relying exclusively on “Edisonian” approach. The knowledge gap in the mechanism about how the precursor is being transformed into catalysts hinders further development of the M-N-C catalysts regardless of the precursor class and processing protocols. Herein, we probed the morphological evolution and chemical transformation of a nitrogen-containing charge transfer organic salt, mixed with transition metal (iron) salt and amorphous silica powder (precursor) during the pyrolysis process via a combination of in situ synchrotron and laboratory-based diagnostic techniques. The pyrolysis process is found to be divided into three stages. During a controlled temperature ramp, the selected organic N-C precursor (nicarbazin) began melting and decomposing just below 400 °C, forming a certain number of micrometer-scale pores and pathways. With increase in temperature from 400 °C to 900 °C, amorphous carbon domains started forming, and reduced (metallic) iron nanoclusters appeared, being dispersed uniformly throughout the carbonaceous matrix. When temperature advanced above 900 °C, graphitization of carbon commenced, associated with appearance and evolution of atomically dispersed metal-nitrogen moieties in the carbonaceous matrix. As the graphitization advanced further, a secondary process of agglomeration of metal nanoparticles occurred. Multi-analytical technique observations conducted here provide a base for rational design and optimization of M-N-C electrocatalysts via pyrolysis. © 2021 Elsevier Ltd",,Amorphous carbon; Atmospheric temperature; Charge transfer; Electrocatalysts; Graphite; Graphitization; Iron; Metal nanoparticles; Nitrogen; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Pyrolysis; Silica; Transition metal compounds; Chemical transformations; Control and optimization; Electrocatalytic activity; Electronic conductivity; High temperature treatments; Materials manufacturing; Morphological transformations; Polymer electrolyte fuel cells; Process control,Amorphous carbon;Atmospheric temperature;Charge transfer;Electrocatalysts;Graphite;Graphitization;Iron;Metal nanoparticles;Nitrogen;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Pyrolysis;Silica;Transition metal compounds;Chemical transformations;Control and optimization;Electrocatalytic activity;Electronic conductivity;High temperature treatments;Materials manufacturing;Morphological transformations;Polymer electrolyte fuel cells;Process control,"P. Atanassov; National Fuel Cell Research Center, University of California Irvine, 92697, United States; email: plamen.atanassov@uci.edu",,,,,,Elsevier B.V.,13697021,,,,English,Mater. Today,Article,Scopus,,2-s2.0-85103704476,,United States;Germany,uci.edu,,,"Huang, Y.; Chen, Y.; Xu, M.; Asset, T.; Tieu, P.; Gili, A.; Kulkarni, D.; de Andrade, V.; de Carlo, F.; Barnard, H.S.; Doran, A.; Parkinson, D.Y.; Pan, X.; Atanassov, P.; Zenyuk, I.V."
"Tomas, M., Gholami, F., Gholami, Z., Sedlacek, J.",Catalysts for Oxygen Reduction Reaction in the Polymer Electrolyte Membrane Fuel Cells: A Brief Review,2021,Electrochem,2,4,,590,603,,7,10.3390/electrochem2040037,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85123893029&doi=10.3390%2Felectrochem2040037&partnerID=40&md5=c434d99fcbb851659b1810b10d6cc309,"New Technologies Research Centre, University of West Bohemia, Plzen, Czech Republic; Unipetrol Centre of Research and Education, a.s, Litvinov, Czech Republic","Tomas, Martin, New Technologies Research Centre, University of West Bohemia, Plzen, Czech Republic; Gholami, Fatemeh, New Technologies Research Centre, University of West Bohemia, Plzen, Czech Republic; Gholami, Zahra, Unipetrol Centre of Research and Education, a.s, Litvinov, Czech Republic; Sedlacek, Jan, New Technologies Research Centre, University of West Bohemia, Plzen, Czech Republic","This mini-review presents a short account of materials with exceptional activity towards oxygen reduction reaction. Two main classes of catalytic materials are described, namely platinum group metal (PGM) catalyst and Non-precious metal catalyst. The classes are discussed in terms of possible application in low-temperature hydrogen fuel cells with proton exchange membrane and further commercialization of these devices. A short description of perspective approaches is provided and challenging issues associated with developed catalytic materials are discussed. © 2021 by the authors.",catalyst; ORR; PEMFC; platinum,,catalyst;ORR;PEMFC;platinum,"M. Tomas; New Technologies-Research Centre, University of West Bohemia, Plzen, Veleslavinova 42, 301 00, Czech Republic; email: mtomas@ntc.zcu.cz",,,,,,Multidisciplinary Digital Publishing Institute (MDPI),,,,,English,Electrochem.,Review,Scopus,,2-s2.0-85123893029,,Czech Republic,ntc.zcu.cz,,,"Tomas, M.; Gholami, F.; Gholami, Z.; Sedlacek, J."
"Pham, N.N.T., Kang, S.G., Kim, H.J., Pak, C., Han, B., Lee, S.G.",Catalytic activity of Ni3Mo surfaces for hydrogen evolution reaction: A density functional theory approach,2021,APPLIED SURFACE SCIENCE,537,,147894,,,7,44,10.1016/j.apsusc.2020.147894,,"[Pham, Nguyet N. T.; Lee, Seung Geol] Pusan Natl Univ, Sch Chem Engn, 2 Busandaehak Ro 63 Beon Gil, Busan 46241, South Korea; [Kang, Sung Gu] Univ Ulsan, Sch Chem Engn, 93 Daehak Ro, Ulsan 44610, South Korea; [Kim, Hyoung-Juhn] Korea Inst Sci & Technol, Ctr Hydrogen Fuel Cell Res, Hwarang Ro 14 Gil 5, Seoul 02792, South Korea; [Pak, Chanho] Gwangju Inst Sci & Technol, Inst Integrated Technol, Sch Integrated Technol, Grad Program Energy Technol, Gwangju 61005, South Korea; [Han, Byungchan] Yonsei Univ, Dept Chem & Biomol Engn, 50 Yonsei Ro, Seoul 03722, South Korea; [Lee, Seung Geol] Pusan Natl Univ, Dept Organ Mat Sci & Engn, 2 Busandaehak Ro 63 Beon Gil, Busan 46241, South Korea",,"Ni3Mo alloys are promising non-platinum group metal catalyst candidates for hydrogen evolution reactions in alkaline solution. The Volmer step for the hydrogen evolution reaction in alkaline medium was examined using density functional theory (DFT). We examined hydrogen adsorption on Ni3Mo surfaces [(0 0 1), (0 2 0), (1 0 0), and (1 0 1)]. Ni3Mo(1 0 1) showed the fastest dissociation of water in the first step of the HER among the investigated Ni3Mo surfaces. Hydrogen atom chemisorption was a key reaction that determines HER performance; the adsorption free energies revealed that Ni3Mo(1 01) has a higher electrocatalytic activity than the other surfaces of Ni3Mo. Our work provides insight into the excellent HER catalytic performance of Ni3Mo in alkaline solution and is expected to inform the design of efficient binary non-PGM catalyst for the HER.",Ni3Mo; Hydrogen evolution reactions; Catalytic water dissociation; Density functional theory; Polymer electrolyte membrane fuel cells,GENERALIZED GRADIENT APPROXIMATION; TOTAL-ENERGY CALCULATIONS; NI-MO ALLOY; EXCHANGE CURRENT; ALKALINE; EFFICIENT; ELECTROCATALYSIS; OXIDATION; ELECTROLYSIS; PERFORMANCE,Ni3Mo;Hydrogen evolution reactions;Catalytic water dissociation;Density functional theory;Polymer electrolyte membrane fuel cells;GENERALIZED GRADIENT APPROXIMATION;TOTAL-ENERGY CALCULATIONS;NI-MO ALLOY;EXCHANGE CURRENT;ALKALINE;EFFICIENT;ELECTROCATALYSIS;OXIDATION;ELECTROLYSIS;PERFORMANCE,sgkang@ulsan.ac.kr; seunggeol.lee@pusan.ac.kr,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0169-4332,,,,English,APPL SURF SCI,Article,WoS,Chemistry; Materials Science; Physics,WOS:000582798700071,2-s2.0-85091516802,South Korea,ulsan.ac.kr,Pusan Natl Univ;Univ Ulsan;Korea Inst Sci & Technol;Gwangju Inst Sci & Technol;Yonsei Univ,"Pusan Natl Univ, South Korea;Univ Ulsan, South Korea;Korea Inst Sci & Technol, South Korea;Gwangju Inst Sci & Technol, South Korea;Yonsei Univ, South Korea","Pham, Nguyet N. T.; Kang, Sung Gu; Kim, Hyoung-Juhn; Pak, Chanho; Han, Byungchan; Lee, Seung Geol"
"Inamoto, M., Kurihara, H., Yajima, T.",Catalytic characteristics of β-iron phthalocyanine prepared by vacuum heat treatment for fuel cell oxygen reduction reaction,2017,Electrochemistry,85,8,,469,471,,2,10.5796/electrochemistry.85.469,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85026829314&doi=10.5796%2Felectrochemistry.85.469&partnerID=40&md5=98cd52b163d9beb337f170f341a9ac5e,"Saitama Industrial Technology Center, Kawaguchi, Saitama, Japan; Department of Applied Chemistry, Saitama Institute of Technology, Fukaya, Saitama, Japan","Inamoto, Masashi, Saitama Industrial Technology Center, Kawaguchi, Saitama, Japan; Kurihara, Hideki, Saitama Industrial Technology Center, Kawaguchi, Saitama, Japan; Yajima, Tatsuhiko, Department of Applied Chemistry, Saitama Institute of Technology, Fukaya, Saitama, Japan","Non-precious metal catalyst materials such as carbon-based catalysts and transition metal chelate compounds have been investigated for reducing the cost of polymer electrolyte fuel cells (PEFCs). Our research on the synthesis of such catalysts has involved vacuum heat treatment for the preparation of iron phthalocyanine (FePc). When a composite of FePc and Ketjenblack carbon was synthesized by vacuum heat treatment at ≥ 350°C for 10h, FePc was deposited as a thin film on the Ketjenblack. Furthermore, synthesis with the vacuum heat treatment at 400°C for 10h (FePc/C-400) transformed the FePc structure from the α phase to the β phase. The oxygen reduction reaction (ORR) activity of FePc/C-400 was higher than those of other FePc/C catalysts treated at different temperatures. The coordination of Fe and N in β-FePc was found to be related to the high ORR activity. © The Electrochemical Society of Japan, All rights reserved.",Ketjenblack; Non-platinum catalyst; ORR,Catalysts; Chelation; Dyes; Electrolytes; Film preparation; Fuel cells; Heat treatment; Iron compounds; Iron research; Nitrogen compounds; Polyelectrolytes; Precious metal compounds; Proton exchange membrane fuel cells (PEMFC); Transition metals; Carbon based catalysts; Ketjenblack; Metal chelate compound; Non-platinum; Non-precious metal catalysts; Oxygen reduction reaction; Polymer electrolyte fuel cells; Vacuum heat treatment; Electrolytic reduction,Ketjenblack;Non-platinum catalyst;ORR;Catalysts;Chelation;Dyes;Electrolytes;Film preparation;Fuel cells;Heat treatment;Iron compounds;Iron research;Nitrogen compounds;Polyelectrolytes;Precious metal compounds;Proton exchange membrane fuel cells (PEMFC);Transition metals;Carbon based catalysts;Metal chelate compound;Non-platinum;Non-precious metal catalysts;Oxygen reduction reaction;Polymer electrolyte fuel cells;Vacuum heat treatment;Electrolytic reduction,"M. Inamoto; Saitama Industrial Technology Center, Kawaguchi, Saitama, 3-12-18 Kamiaoki, 333-0844, Japan; email: inamoto.masashi.am@pref.saitama.lg.jp",,,,,,Electrochemical Society of Japan editor-in-chief@electrochem.jp,13443542,,EECTF,,English,Electrochem,Article,Scopus,,2-s2.0-85026829314,,Japan,pref.saitama.lg.jp,,,"Inamoto, M.; Kurihara, H.; Yajima, T."
"Li, S., Wang, J.T., Chen, R.X., Zhao, W., Qian, L., Pan, M.",Catalytic Performance of Heat-Treated Fe-Melamine/C and Fe-g-C3N4/C Electrocatalysts for Oxygen Reduction Reaction,2013,ACTA PHYSICO-CHIMICA SINICA,29,4,,792,798,7,12,10.3866/PKU.WHXB201302221,,"[Li Shang; Wang Jia-Tang; Chen Rui-Xin; Zhao Wei; Qian Liu; Pan Mu] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China",,"Melamine and its polymer (g-C3N4) were used as ligands to prepare Fe-N/C electrocatalysts for the oxygen reduction reaction (ORR) by an impregnation method. The composition, morphology and electrocatalytic activity of the catalysts were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and electrochemical measurements. The Fe-N/C catalyst using g-C3N4 as a complex ligand showed higher activity in the ORR than that with melamine. The formation of quaternary N active sites on the surface of the catalyst during heat treatment helps to improve their performance in the ORR.",Melamine; Non-noble metal electrocatalyst; Oxygen reduction reaction; Graphitic N; Proton exchange membrane fuel cell,ELECTROLYTE FUEL-CELLS; IRON; GRAPHENE; COBALT,Melamine;Non-noble metal electrocatalyst;Oxygen reduction reaction;Graphitic N;Proton exchange membrane fuel cell;ELECTROLYTE FUEL-CELLS;IRON;GRAPHENE;COBALT,lishang@whut.edu.cn,,"PEKING UNIV, CHEMISTRY BUILDING, BEIJING 100871, PEOPLES R CHINA",,,,PEKING UNIV PRESS,1000-6818,,,,Chinese,ACTA PHYS-CHIM SIN,Article,WoS,Chemistry,WOS:000316864300018,2-s2.0-84877858490,China,whut.edu.cn,Wuhan Univ Technol,"Wuhan Univ Technol, China",Li Shang; Wang Jia-Tang; Chen Rui-Xin; Zhao Wei; Qian Liu; Pan Mu
"Garces-Barria, C., Caceres-Diaz, D., Torres-Fernandez, J., Bustamante, T.M., Elgueta, E., Sanhueza, F.",Cathode Materials for Proton Exchange Membrane Fuel Cells: From Metal and Metal Composite Catalysts to Carbon-Supported Hybrids in Oxygen Reduction Reaction,2025,ChemElectroChem,12,16,e202500146,,,,1,10.1002/celc.202500146,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105009861437&doi=10.1002%2Fcelc.202500146&partnerID=40&md5=caeac771f3ca112553497ec37f0f3470,"Universidad de Concepcion, Concepcion, BI, Chile; Universidad de Concepcion, Concepcion, BI, Chile; Faculty of Science, Universidad Catolica de la Santisima Concepcion, Concepcion, BI, Chile","Garcés-Barría, Claudia, Universidad de Concepcion, Concepcion, BI, Chile; Cáceres-Díaz, Daniel, Universidad de Concepcion, Concepcion, BI, Chile; Torres-Fernández, Javiera, Universidad de Concepcion, Concepcion, BI, Chile; Bustamante, Tatiana M., Universidad de Concepcion, Concepcion, BI, Chile; Elgueta, Elizabeth Y., Faculty of Science, Universidad Catolica de la Santisima Concepcion, Concepcion, BI, Chile; Sanhueza, Felipe A., Universidad de Concepcion, Concepcion, BI, Chile","This review provides an overview of recent advancements in cathode materials for proton exchange membrane fuel cells (PEMFCs), focusing on their role in catalyzing the oxygen reduction reaction (ORR). This begins with a fundamental discussion of the ORR mechanism, including two-electron and four-electron pathways. The review then explores a wide range of electrocatalyst materials, starting with precious metal catalysts, particularly platinum-based materials, along with alloying strategies and composite structures. This then delves into nonprecious metal catalysts, encompassing metal-free ORR electrocatalysts, carbon-supported composite materials (including heteroatom doping and metal-carbon composites), and transition metal oxides. The review further examines metal phthalocyanines, biomass-derived catalysts, bimetallic and trimetallic nanoparticles supported on carbon matrices, and chalcogenides (oxides, sulfides, and selenides) as ORR electrocatalysts. Advanced materials such as single- and dual-atom catalysts, high-entropy alloys, and metal organic frameworks derived electrocatalysts are also discussed. We analyze the identification of reaction sites and the effect of structure on catalytic activity. Furthermore, the review covers electrochemical measurements in PEMFCs and explores technological applications and industrial relevance, including products and patents. Finally, this review concludes by addressing future perspectives and challenges in the field of cathode materials for PEMFCs. © 2025 The Author(s). ChemElectroChem published by Wiley-VCH GmbH.",electrocatalysts; fuel cells; nonprecious metal catalysts; oxygen reduction reaction; precious metal catalysts; proton exchange membrane,Carbon; Carbon carbon composites; Catalyst activity; Catalyst supports; Cathode materials; Cathodes; Electrolytic reduction; Gas fuel purification; High-entropy alloys; Metal fuels; Metal nanoparticles; Oxygen; Oxygen reduction reaction; Patents and inventions; Platinum alloys; Cathodes material; Composite catalysts; Metal composites; Non-precious metal catalysts; Nonprecious-metal catalysts; Precious-metal catalysts; Proton exchange membranes; Proton-exchange membranes fuel cells; ]+ catalyst; Electrocatalysts; Proton exchange membrane fuel cells (PEMFC),electrocatalysts;fuel cells;nonprecious metal catalysts;oxygen reduction reaction;precious metal catalysts;proton exchange membrane;Carbon;Carbon carbon composites;Catalyst activity;Catalyst supports;Cathode materials;Cathodes;Electrolytic reduction;Gas fuel purification;High-entropy alloys;Metal fuels;Metal nanoparticles;Oxygen;Patents and inventions;Platinum alloys;Cathodes material;Composite catalysts;Metal composites;Non-precious metal catalysts;Nonprecious-metal catalysts;Precious-metal catalysts;Proton exchange membranes;Proton-exchange membranes fuel cells;]+ catalyst;Proton exchange membrane fuel cells (PEMFC),"C. Garcés-Barría; Departamento de Ingeniería de Materiales (DIMAT), Universidad de Concepción, 4070386, Chile; email: claugarces@udec.cl; F. Sanhueza; Departamento de Ingeniería de Materiales (DIMAT), Universidad de Concepción, 4070386, Chile; email: fesanhueza@udec.cl",,,,,,John Wiley and Sons Inc,,,,,English,ChemElectroChem,Review,Scopus,,2-s2.0-105009861437,,Chile,udec.cl,,,"Garces-Barria, C.; Caceres-Diaz, D.; Torres-Fernandez, J.; Bustamante, T.M.; Elgueta, E.; Sanhueza, F."
"Wang, L., Liu, X., Su, K., Liu, W., Niu, F., Li, X., Yue, H., Dong, H., Yang, S., Yin, Y.",Ce-Doped Fe-N-C/Fe3C Nanosheets as an Efficient Oxygen Electrocatalyst under Alkaline and Acidic Media,2024,ACS Applied Nano Materials,7,19,,22855,22864,,5,10.1021/acsanm.4c04024,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85205898343&doi=10.1021%2Facsanm.4c04024&partnerID=40&md5=b0346ae56af4e8d9cc2b3e40220367b9,"School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, China; Collaborative Innovation Center of Henan Province for Motive Power and Key Materials, Xinxiang, Henan, China; School of Physics, Henan Normal University, Xinxiang, Henan, China","Wang, Luyan, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, China, Collaborative Innovation Center of Henan Province for Motive Power and Key Materials, Xinxiang, Henan, China; Liu, Xili, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, China, Collaborative Innovation Center of Henan Province for Motive Power and Key Materials, Xinxiang, Henan, China; Su, Keke, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, China, Collaborative Innovation Center of Henan Province for Motive Power and Key Materials, Xinxiang, Henan, China; Liu, Wenfeng, Collaborative Innovation Center of Henan Province for Motive Power and Key Materials, Xinxiang, Henan, China, School of Physics, Henan Normal University, Xinxiang, Henan, China; Niu, Fuquan, Collaborative Innovation Center of Henan Province for Motive Power and Key Materials, Xinxiang, Henan, China, School of Physics, Henan Normal University, Xinxiang, Henan, China; Li, Xiangnan, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, China, Collaborative Innovation Center of Henan Province for Motive Power and Key Materials, Xinxiang, Henan, China; Yue, Hongyun, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, China, Collaborative Innovation Center of Henan Province for Motive Power and Key Materials, Xinxiang, Henan, China; Dong, Hongyu, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, China, Collaborative Innovation Center of Henan Province for Motive Power and Key Materials, Xinxiang, Henan, China; Yang, Shuting, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, China, Collaborative Innovation Center of Henan Province for Motive Power and Key Materials, Xinxiang, Henan, China; Yin, Yanhong, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, China, Collaborative Innovation Center of Henan Province for Motive Power and Key Materials, Xinxiang, Henan, China","Reasonable design of an economical and efficient versatile oxygen electrocatalyst for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is urgently needed in metal-air batteries and fuel cells. Herein, a Ce-doped Fe-NC/Fe<inf>3</inf>C (Ce/Fe-NC/Fe<inf>3</inf>C-P) porous nanosheet catalyst was prepared from the pyrolysis of a two-dimensional ZIF assisted with NaCl molten salt. Under alkaline media, the ORR half-wave potential (E<inf>1/2</inf>) is 0.87 V, and the OER overpotential is 389 mV. The Zn-air batteries (ZABs) assembled with the Ce/Fe-NC/Fe<inf>3</inf>C-P catalyst demonstrate a maximum power density (P<inf>M</inf>) of 184 mW cm-2. Under acidic media, the E<inf>1/2</inf> of the ORR is 0.78 V, and the P<inf>M</inf> is 347 mW cm-2 in the proton exchange membrane fuel cell (PEMFC) cathode. The enhanced catalytic activity and stability benefit from the abundant catalytic active sites (Fe<inf>3</inf>C, Fe-N<inf>X</inf>, Ce-N) by Fe and Ce doping, hierarchical porous structure, and relatively higher graphitization originating from the molten NaCl assisting pyrolysis. © 2024 American Chemical Society.",hierarchical porous; ORR/OER catalyst; PEMFCs; stability; ZABs,Cerium alloys; Electrolytic reduction; Iron; Nanosheets; Oxygen reduction reaction; Zinc air batteries; Zinc alloys; Acidic media; Alkaline media; Ce-doped; Evolution reactions; Hierarchical porous; Oxygen evolution; Oxygen reduction reaction/oxygen evolution reaction catalyst; P.E.M.F.C; ]+ catalyst; Pyrolysis,hierarchical porous;ORR/OER catalyst;PEMFCs;stability;ZABs;Cerium alloys;Electrolytic reduction;Iron;Nanosheets;Oxygen reduction reaction;Zinc air batteries;Zinc alloys;Acidic media;Alkaline media;Ce-doped;Evolution reactions;Oxygen evolution;Oxygen reduction reaction/oxygen evolution reaction catalyst;P.E.M.F.C;]+ catalyst;Pyrolysis,"Y. Yin; School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, China; email: yyh3326439@foxmail.com",,,,,,American Chemical Society,,,,,English,ACS Appl. Nano Mat.,Article,Scopus,,2-s2.0-85205898343,,China,foxmail.com,,,"Wang, L.; Liu, X.; Su, K.; Liu, W.; Niu, F.; Li, X.; Yue, H.; Dong, H.; Yang, S.; Yin, Y."
"Ota, K., Nagai, T., Kuroda, Y., Matsuzawa, K., Mitsushima, S., Ishihara, A.",CHALLENGES OF NPGM OXIDE CATHODE WITH METAL OXIDE SUPPORT FOR ADVANCED PEFCS,2017,,,,,37,38,,0,,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85173574469&partnerID=40&md5=4ce82f3538b94e06b339694fd54b9d18,"Yokohama National University, Yokohama, Kanagawa, Japan; Institute of Advanced Sciences, Yokohama National University, Yokohama, Kanagawa, Japan","Ota, Kenichiro, Yokohama National University, Yokohama, Kanagawa, Japan; Nagai, Takaaki, Yokohama National University, Yokohama, Kanagawa, Japan; Kuroda, Yoshiyuki, Yokohama National University, Yokohama, Kanagawa, Japan; Matsuzawa, Koichi, Yokohama National University, Yokohama, Kanagawa, Japan; Mitsushima, Shigenori, Yokohama National University, Yokohama, Kanagawa, Japan, Institute of Advanced Sciences, Yokohama National University, Yokohama, Kanagawa, Japan; Ishihara, Akimitsu, Institute of Advanced Sciences, Yokohama National University, Yokohama, Kanagawa, Japan","The precious-metal-free and carbon-free cathodes based on oxides (titanium-niobium oxides mixed with Ti<inf>4</inf>O<inf>7</inf> (TixNbyOz + Ti<inf>4</inf>O<inf>7</inf>) showed the superior durability. The ORR activity of the TixNbyOz + Ti<inf>4</inf>O<inf>7</inf> is higher than that of the Ti<inf>4</inf>O<inf>7</inf>. No degradation of the ORR performance of TixNbyOz + Ti<inf>4</inf>O<inf>7</inf> was observed during both start-stop and load cycle tests. In order to qualify the role of Nb oxide for ORR, we used TiO<inf>2</inf>-Nb (Nb: 0.5, 1 and 5 atm%) rods as working electrodes. In reducing atmosphere treatment, TiO<inf>2-</inf>Nb (0.5 atm%) rod had best ORR activity that was heat-treated at 800 oC. However TiO<inf>2</inf>-Nb(5%) showed the best result in air treatment at 800oC. The heat-treatment temperature and the atmosphere are important to get high ORR activity. © EFC 2017 - Proceedings of the 7th European Fuel Cell Piero Lunghi Conference.",cathode catalyst; non PGM catalyst; polymer electrolyte fuel cell; titanium oxide,Catalysts; Cathodes; Niobium oxide; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Carbon-free; Cathode catalyst; Cycle tests; Load cycle; Metal free; Metal oxide supports; Non-PGM catalysts; Oxide cathode; Performance; Polymer electrolyte fuel cells; Titanium dioxide,cathode catalyst;non PGM catalyst;polymer electrolyte fuel cell;titanium oxide;Catalysts;Cathodes;Niobium oxide;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Carbon-free;Cycle tests;Load cycle;Metal free;Metal oxide supports;Non-PGM catalysts;Oxide cathode;Performance;Polymer electrolyte fuel cells;Titanium dioxide,; ; ; ; ,"Cigolotti, V.; Barchiesi, C.; Chianella, M.",,"7th European Fuel Cell Piero Lunghi Conference, EFC 2017",Naples,2017-12-12 through 2017-12-15,ENEA,,9788882863241,,,English,EFC - Proc. Eur. Fuel Cell Piero Lunghi Conf.,Conference paper,Scopus,,2-s2.0-85173574469,,Japan,No email,,,"Ota, K.; Nagai, T.; Kuroda, Y.; Matsuzawa, K.; Mitsushima, S.; Ishihara, A."
"Dzara, M.J., Artyushkova, K., Sougrati, M.T., Ngo, C., Fitzgerald, M.A., Serov, A., Halevi, B., Atanassov, P., Jaouen, F., Pylypenko, S.",Characterizing Complex Gas-Solid Interfaces with in Situ Spectroscopy: Oxygen Adsorption Behavior on Fe-N-C Catalysts,2020,Journal of Physical Chemistry C,124,30,,16529,16543,,27,10.1021/acs.jpcc.0c05244,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85090187511&doi=10.1021%2Facs.jpcc.0c05244&partnerID=40&md5=6843316447135f95769418b05bab242a,"Department of Chemistry, Colorado School of Mines, Golden, CO, United States; Physical Electronics, Inc., Minnesota, Chanhassen, MN, United States; Université de Montpellier, Montpellier, Occitanie, France; Pajarito Powder, Albuquerque, NM, United States; Department of Chemical Engineering, University of California, Irvine, Irvine, CA, United States","Dzara, Michael J., Department of Chemistry, Colorado School of Mines, Golden, CO, United States; Artyushkova, Kateryna, Physical Electronics, Inc., Minnesota, Chanhassen, MN, United States; Sougrati, Moulay T., Université de Montpellier, Montpellier, Occitanie, France; Ngo, Chilan, Department of Chemistry, Colorado School of Mines, Golden, CO, United States; Fitzgerald, Margaret A., Department of Chemistry, Colorado School of Mines, Golden, CO, United States; Serov, Alexey Alexandrovich, Pajarito Powder, Albuquerque, NM, United States; Halevi, Barr, Pajarito Powder, Albuquerque, NM, United States; Atanassov, Plamen B., Department of Chemical Engineering, University of California, Irvine, Irvine, CA, United States; Jaouen, Frédéric, Université de Montpellier, Montpellier, Occitanie, France; Pylypenko, Svitlana, Department of Chemistry, Colorado School of Mines, Golden, CO, United States","Electrocatalysts for the oxygen reduction reaction within polymer electrolyte membrane fuel cells based on iron, nitrogen, and carbon elements (Fe-N-C) have received significant research attention as they offer an inexpensive alternative to catalysts based on platinum-group metals. Although both the performance and the fundamental understanding of Fe-N-C catalysts have improved over the past decade, there remains a need to differentiate the relative activity of different active sites. Toward this goal, our study is focused on characterizing the interactions between O2 and a set of five structurally different Fe-N-C materials. Detailed characterization of the Fe speciation was performed with 57Fe Mössbauer spectroscopy and soft X-ray absorption spectroscopy of the Fe L3,2-edge, whereas nitrogen chemical states were investigated with X-ray photoelectron spectroscopy (XPS). In addition to initial sXAS and XPS measurements performed in ultra-high vacuum (UHV), measurements were also performed (at the identical location) in an atmosphere of 100 mTorr of O2 at 80 °C (O2-rich). XPS and sXAS results reveal the presence of several types of FeNxCy adsorption sites. FeNxCy sites that are proposed as the most active ones do not show significant change (based on the techniques used in this study) when their environment is changed from UHV to O2-rich. Correlation with Mössbauer and sXAS results suggests that this is most likely due to the persistence of strongly adsorbed O2 molecules from their previous exposure to air. However, other species do show spectroscopic changes from UHV conditions to O2-rich. This implies that these sites have a weaker interaction with O2 that results in their desorption in vacuum conditions and re-adsorption when exposed to the O2-rich environment. The nature of these weakly and strongly O2-adsorbing FeNxCy sites is discussed in the context of different synthetic and processing parameters employed to fabricate each of these five Fe-N-C materials. © © 2020 American Chemical Society.",,Catalyst activity; Chemical speciation; Electrocatalysts; Electrolytic reduction; Gas adsorption; Iron; Iron research; Nitrogen; Oxygen; Oxygen reduction reaction; Phase interfaces; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Ultrahigh vacuum; X ray absorption spectroscopy; X ray photoelectron spectroscopy; X rays; Gas-solid interface; In-situ spectroscopy; Platinum group metals; Processing parameters; Relative activities; Soft x-ray absorption spectroscopies; Spectroscopic changes; Ssbauer spectroscopies; Iron metallography,Catalyst activity;Chemical speciation;Electrocatalysts;Electrolytic reduction;Gas adsorption;Iron;Iron research;Nitrogen;Oxygen;Oxygen reduction reaction;Phase interfaces;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Ultrahigh vacuum;X ray absorption spectroscopy;X ray photoelectron spectroscopy;X rays;Gas-solid interface;In-situ spectroscopy;Platinum group metals;Processing parameters;Relative activities;Soft x-ray absorption spectroscopies;Spectroscopic changes;Ssbauer spectroscopies;Iron metallography,"S. Pylypenko; Department of Chemistry, Colorado School of Mines, Golden, 80401, United States; email: spylypen@mines.edu",,,,,,American Chemical Society service@acs.org,19327447,,,,English,J. Phys. Chem. C,Article,Scopus,,2-s2.0-85090187511,,United States;France,mines.edu,,,"Dzara, M.J.; Artyushkova, K.; Sougrati, M.T.; Ngo, C.; Fitzgerald, M.A.; Serov, A.; Halevi, B.; Atanassov, P.; Jaouen, F.; Pylypenko, S."
"Liu, S.W., Wang, M.Y., Yang, X.X., Shi, Q.R., Qiao, Z., Lucero, M., Ma, Q., More, K.L., Cullen, D.A., Feng, Z.X., Wu, G.",Chemical Vapor Deposition for Atomically Dispersed and Nitrogen Coordinated Single Metal Site Catalysts,2020,ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,59,48,,21698,21705,8,201,10.1002/anie.202009331,,"[Liu, Shengwen; Yang, Xiaoxuan; Shi, Qiurong; Qiao, Zhi; Wu, Gang] SUNY Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA; [Wang, Maoyu; Lucero, Marcos; Feng, Zhenxing] Oregon State Univ, Sch Chem Biol & Environm Engn, Corvallis, OR 97331 USA; [Ma, Qing] Northwestern Univ, Synchrotron Res Ctr, DND CAT, Evanston, IL 60208 USA; [More, Karren L.; Cullen, David A.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA",,"Atomically dispersed and nitrogen coordinated single metal sites (M-N-C, M=Fe, Co, Ni, Mn) are the popular platinum group-metal (PGM)-free catalysts for many electrochemical reactions. Traditional wet-chemistry catalyst synthesis often requires complex procedures with unsatisfied reproducibility and scalability. Here, we report a facile chemical vapor deposition (CVD) strategy to synthesize the promising M-N-C catalysts. The deposition of gaseous 2-methylimidazole onto M-doped ZnO substrates, followed by an in situ thermal activation, effectively generated single metal sites well dispersed into porous carbon. In particular, an optimal CVD-derived Fe-N-C catalyst exclusively contains atomically dispersed FeN(4)sites with increased Fe loading relative to other catalysts from wet-chemistry synthesis. The catalyst exhibited outstanding oxygen-reduction activity in acidic electrolytes, which was further studied in proton-exchange membrane fuel cells with encouraging performance.",chemical vapor deposition; electrocatalysis; Fe-N-C; oxygen reduction reaction; single metal sites,OXYGEN REDUCTION REACTION; MEMBRANE FUEL-CELLS; N-C ELECTROCATALYST; ZNO NANOPARTICLES; CATHODE CATALYSTS; ACTIVE-SITES; RAMAN-SPECTROSCOPY; CARBON CATALYSTS; POROUS CARBON; PERFORMANCE,chemical vapor deposition;electrocatalysis;Fe-N-C;oxygen reduction reaction;single metal sites;MEMBRANE FUEL-CELLS;N-C ELECTROCATALYST;ZNO NANOPARTICLES;CATHODE CATALYSTS;ACTIVE-SITES;RAMAN-SPECTROSCOPY;CARBON CATALYSTS;POROUS CARBON;PERFORMANCE,cullenda@ornl.gov; zhenxing.feng@oregonstate.edu; gangwu@buffalo.edu,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1433-7851,,,32820860,English,ANGEW CHEM INT EDIT,Article,WoS,Chemistry,WOS:000571862700001,2-s2.0-85091294192,United States,ornl.gov,SUNY Buffalo;Oregon State Univ;Northwestern Univ;Oak Ridge Natl Lab,"SUNY Buffalo, United States;Oregon State Univ, United States;Northwestern Univ, United States;Oak Ridge Natl Lab, United States","Liu, Shengwen; Wang, Maoyu; Yang, Xiaoxuan; Shi, Qiurong; Qiao, Zhi; Lucero, Marcos; Ma, Qing; More, Karren L.; Cullen, David A.; Feng, Zhenxing; Wu, Gang"
"Jiao, L., Li, J.K., Richard, L.L., Sun, Q., Stracensky, T., Liu, E.R., Sougrati, M.T., Zhao, Z.P., Yang, F., Zhong, S.C., Xu, H., Mukerjee, S., Huang, Y., Cullen, D.A., Park, J.H., Ferrandon, M., Myers, D.J., Jaouen, F., Jia, Q.Y.",Chemical vapour deposition of Fe-N-C oxygen reduction catalysts with full utilization of dense Fe-N4 sites,2021,NATURE MATERIALS,20,10,,1385,+,9,587,10.1038/s41563-021-01030-2,,"[Jiao, Li] Northeastern Univ, Dept Chem Engn, Boston, MA 02115 USA; [Li, Jingkun; Sougrati, Moulay Tahar; Jaouen, Frederic] Univ Montpellier, Inst Charles Gerhardt Montpellier, CNRS, ENSCM, Montpellier, France; [Richard, Lynne LaRochelle; Sun, Qiang; Stracensky, Thomas; Liu, Ershuai; Mukerjee, Sanjeev; Jia, Qingying] Northeastern Univ, Dept Chem & Chem Biol, Boston, MA 02115 USA; [Zhao, Zipeng; Huang, Yu] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA USA; [Yang, Fan; Zhong, Sichen; Xu, Hui] Giner, Newton, MA USA; [Huang, Yu] Univ Calif Los Angeles, Calif NanoSyst Inst, Los Angeles, CA USA; [Cullen, David A.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN USA; [Park, Jae Hyung; Ferrandon, Magali; Myers, Deborah J.] Argonne Natl Lab, Chem Sci & Engn Div, Lemont, IL 60439 USA",,"Replacing scarce and expensive platinum (Pt) with metal-nitrogen-carbon (M-N-C) catalysts for the oxygen reduction reaction in proton exchange membrane fuel cells has largely been impeded by the low oxygen reduction reaction activity of M-N-C due to low active site density and site utilization. Herein, we overcome these limits by implementing chemical vapour deposition to synthesize Fe-N-C by flowing iron chloride vapour over a Zn-N-C substrate at 750 degrees C, leading to high-temperature trans-metalation of Zn-N-4 sites into Fe-N-4 sites. Characterization by multiple techniques shows that all Fe-N-4 sites formed via this approach are gas-phase and electrochemically accessible. As a result, the Fe-N-C catalyst has an active site density of 1.92 x 10(20) sites per gram with 100% site utilization. This catalyst delivers an unprecedented oxygen reduction reaction activity of 33 mA cm(-2) at 0.90 V (iR-corrected; i, current; R, resistance) in a H-2-O-2 proton exchange membrane fuel cell at 1.0 bar and 80 degrees C. Replacing platinum with metal-nitrogen-carbon catalysts for the oxygen reduction reaction in proton exchange membrane fuel cells has been impeded by low activity. These limitations have now been overcome by the trans-metalation of Zn-N-4 sites into Fe-N-4 sites.",,FUEL-CELL CATHODES; ACTIVE-SITES; TURNOVER FREQUENCY; IRON; ELECTROCATALYSTS; IDENTIFICATION; ALLOY,FUEL-CELL CATHODES;ACTIVE-SITES;TURNOVER FREQUENCY;IRON;ELECTROCATALYSTS;IDENTIFICATION;ALLOY,dmyers@anl.gov; frederic.jaouen@umontpellier.fr; qjia@iit.edu,,"HEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY",,,,NATURE PORTFOLIO,1476-1122,,,34112977,English,NAT MATER,Article,WoS,Chemistry; Materials Science; Physics,WOS:000659834100004,2-s2.0-85107482195,United States;France,anl.gov,Northeastern Univ;Univ Montpellier;Univ Calif Los Angeles;Giner;Oak Ridge Natl Lab;Argonne Natl Lab,"Northeastern Univ, United States;Univ Montpellier, France;Univ Calif Los Angeles, United States;Giner, United States;Oak Ridge Natl Lab, United States;Argonne Natl Lab, United States","Jiao, Li; Li, Jingkun; Richard, Lynne LaRochelle; Sun, Qiang; Stracensky, Thomas; Liu, Ershuai; Sougrati, Moulay Tahar; Zhao, Zipeng; Yang, Fan; Zhong, Sichen; Xu, Hui; Mukerjee, Sanjeev; Huang, Yu; Cullen, David A.; Park, Jae Hyung; Ferrandon, Magali; Myers, Deborah J.; Jaouen, Frederic; Jia, Qingying"
"Asokan, A., Abu-Khalla, S., Abdalla, S., Suss, M.E.","Chloride-Tolerant, Inexpensive Fe/N/C Catalysts for Desalination Fuel Cell Cathodes",2022,ACS Applied Energy Materials,5,2,,1743,1754,,8,10.1021/acsaem.1c03175,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85125118566&doi=10.1021%2Facsaem.1c03175&partnerID=40&md5=de44dc50252f406a87afc779df2bbfa9,"Faculty of Mechanical Engineering, Technion - Israel Institute of Technology, Haifa, Israel; Technion - Israel Institute of Technology, Haifa, Israel; Technion - Israel Institute of Technology, Haifa, Israel","Asokan, Arunchander, Faculty of Mechanical Engineering, Technion - Israel Institute of Technology, Haifa, Israel, Technion - Israel Institute of Technology, Haifa, Israel; Abu-Khalla, Shada, Faculty of Mechanical Engineering, Technion - Israel Institute of Technology, Haifa, Israel, Technion - Israel Institute of Technology, Haifa, Israel; Abdalla, Salman, Faculty of Mechanical Engineering, Technion - Israel Institute of Technology, Haifa, Israel; Suss, Matthew E., Faculty of Mechanical Engineering, Technion - Israel Institute of Technology, Haifa, Israel, Technion - Israel Institute of Technology, Haifa, Israel, Technion - Israel Institute of Technology, Haifa, Israel","Clean technologies, which utilize or generate clean energy rather than fossil fuel-based energy, are under intense development to aid in addressing climate change. Current water desalination technologies are a growing user of fossil fuel-derived electricity. A recently developed technology, termed the desalination fuel cell (DFC), can address this issue by instead using hydrogen gas to drive both feedwater desalination and green electricity generation simultaneously in a single cell. The main bottleneck is the use of Pt-based catalysts, which leads to high device costs and catalyst surface poisoning due to chloride ions (Cl-) present in the feedwater. We here propose and demonstrate the first use of non-platinum group metal (non-PGM) catalysts toward DFCs. We synthesized a Fe/N/C based catalyst which demonstrated effective and Cl- tolerant oxygen reduction reaction ex situ and while used as a DFC cathode. The synthesis temperature and the metal concentrations were optimized using rotating disk electrode measurements, with an onset potential of up to 0.84 V vs RHE, on par with that of commercial Pt/C catalysts in a Cl- environment. When using the optimized Fe/N/C catalyst as a cathode in a prototype DFC, open circuit voltage was significantly improved relative to Pt/C, and measured cell voltage and desalination performance versus current density were nearly equivalent. Overall, these results show that non-PGM catalysts maintain or improve cell performance while significantly reducing cell costs, improving greatly the outlook for this nascent technology. © 2022 American Chemical Society",Alternative catalyst; chloride tolerance; desalination fuel cells; Fe/N/C; oxygen reduction reaction,Catalyst poisoning; Cathodes; Chlorine compounds; Climate change; Electrolytic reduction; Fossil fuels; Gas fuel purification; Open circuit voltage; Proton exchange membrane fuel cells (PEMFC); Water filtration; Alternative catalysts; Chloride tolerances; Desalination fuel cell; Fe/N/C; Feedwater; Fuel cell cathodes; Non-platinum; Oxygen reduction reaction; Platinum group metals; ]+ catalyst; Desalination,Alternative catalyst;chloride tolerance;desalination fuel cells;Fe/N/C;oxygen reduction reaction;Catalyst poisoning;Cathodes;Chlorine compounds;Climate change;Electrolytic reduction;Fossil fuels;Gas fuel purification;Open circuit voltage;Proton exchange membrane fuel cells (PEMFC);Water filtration;Alternative catalysts;Chloride tolerances;Desalination fuel cell;Feedwater;Fuel cell cathodes;Non-platinum;Platinum group metals;]+ catalyst;Desalination,"M.E. Suss; Faculty of Mechanical Engineering, Technion─Israel Institute of Technology, Haifa, 3200003, Israel; email: mesuss@technion.ac.il",,,,,,American Chemical Society,,,,,English,ACS Appl. Ener. Mat.,Article,Scopus,,2-s2.0-85125118566,,Israel,technion.ac.il,,,"Asokan, A.; Abu-Khalla, S.; Abdalla, S.; Suss, M.E."
"Yan, Q., Feng, J., Shi, W., Niu, W., Lu, Z., Sun, K., Yang, X., Xue, L., Liu, Y., Li, Y., Zhang, B.",Chromium-Induced High Covalent Co–O Bonds for Efficient Anodic Catalysts in PEM Electrolyzer,2024,Advanced Science,11,25,2402356,,,,20,10.1002/advs.202402356,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85190812827&doi=10.1002%2Fadvs.202402356&partnerID=40&md5=713707c8d34aad645f0f775dd3fad081,"Department of Macromolecular Science, Fudan University, Shanghai, China; Soochow University, Suzhou, Jiangsu, China","Yan, Qisheng, Department of Macromolecular Science, Fudan University, Shanghai, China; Feng, Jie, Soochow University, Suzhou, Jiangsu, China; Shi, Wenjuan, Department of Macromolecular Science, Fudan University, Shanghai, China; Niu, Wenzhe, Department of Macromolecular Science, Fudan University, Shanghai, China; Lu, Zhuorong, Department of Macromolecular Science, Fudan University, Shanghai, China; Sun, Kai, Department of Macromolecular Science, Fudan University, Shanghai, China; Yang, Xiao, Department of Macromolecular Science, Fudan University, Shanghai, China; Xue, Liangyao, Department of Macromolecular Science, Fudan University, Shanghai, China; Liu, Yi, Department of Macromolecular Science, Fudan University, Shanghai, China; Li, Youyong, Soochow University, Suzhou, Jiangsu, China; Zhang, Bo, Department of Macromolecular Science, Fudan University, Shanghai, China","The proton exchange membrane water electrolyzer (PEMWE), crucial for green hydrogen production, is challenged by the scarcity and high cost of iridium-based materials. Cobalt oxides, as ideal electrocatalysts for oxygen evolution reaction (OER), have not been extensively applied in PEMWE, due to extremely high voltage and poor stability at large current density, caused by complicated structural variations of cobalt compounds during the OER process. Thus, the authors sought to introduce chromium into a cobalt spinel (Co<inf>3</inf>O<inf>4</inf>) catalyst to regulate the electronic structure of cobalt, exhibiting a higher oxidation state and increased Co–O covalency with a stable structure. In-depth operando characterizations and theoretical calculations revealed that the activated Co–O covalency and adaptable redox behavior are crucial for facilitating its OER activity. Both turnover frequency and mass activity of Cr-doped Co<inf>3</inf>O<inf>4</inf> (CoCr) at 1.67 V (vs RHE) increased by over eight times than those of as-synthesized Co<inf>3</inf>O<inf>4</inf>. The obtained CoCr catalyst achieved 1500 mA cm−2 at 2.17 V and exhibited notable durability over extended operation periods – over 100 h at 500 mA cm−2 and 500 h at 100 mA cm−2, demonstrating promising application in the PEMWE industry. © 2024 The Authors. Advanced Science published by Wiley-VCH GmbH.",cobalt oxides; non-precious metal catalysts; oxygen evolution reaction; proton exchange membrane water electrolyzer,Binary alloys; Chemical oxygen demand; Chromium; Cobalt; Cobalt alloys; Electrocatalysts; Electrolytic cells; Electronic structure; Hydrogen production; Oxygen; Proton exchange membrane fuel cells (PEMFC); Covalencies; High costs; High-voltages; Non-precious metal catalysts; PEM-electrolyzer; Poor stability; Proton exchange membrane water electrolyze; Proton exchange membranes; Water electrolyzer; ]+ catalyst; Cobalt compounds; chromium; cobalt; cobalt derivative; hydrogen; iridium; proton; water; article; catalyst; controlled study; current density; electric potential; membrane; oxidation; oxygen evolution reaction,cobalt oxides;non-precious metal catalysts;oxygen evolution reaction;proton exchange membrane water electrolyzer;Binary alloys;Chemical oxygen demand;Chromium;Cobalt;Cobalt alloys;Electrocatalysts;Electrolytic cells;Electronic structure;Hydrogen production;Oxygen;Proton exchange membrane fuel cells (PEMFC);Covalencies;High costs;High-voltages;PEM-electrolyzer;Poor stability;Proton exchange membrane water electrolyze;Proton exchange membranes;Water electrolyzer;]+ catalyst;Cobalt compounds;cobalt derivative;hydrogen;iridium;proton;water;article;catalyst;controlled study;current density;electric potential;membrane;oxidation,"B. Zhang; State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China; email: bozhang@fudan.edu.cn",,,,,,John Wiley and Sons Inc,,,,38647401,English,Adv. Sci.,Article,Scopus,,2-s2.0-85190812827,,China,fudan.edu.cn,,,"Yan, Q.; Feng, J.; Shi, W.; Niu, W.; Lu, Z.; Sun, K.; Yang, X.; Xue, L.; Liu, Y.; Li, Y.; Zhang, B."
"Yao, Y., Xiao, H., Wang, P., Su, P.P., Shao, Z.G., Yang, Q.H.",CNTs@Fe-C-C core-shell nanostructures as active electrocatalyst for oxygen reduction,2014,JOURNAL OF MATERIALS CHEMISTRY A,2,30,,11768,11775,8,49,10.1039/c4ta01237b,,"[Yao, Yi; Wang, Peng; Su, Panpan; Yang, Qihua] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China; [Xiao, Hui; Shao, Zhigang] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China; [Yao, Yi; Xiao, Hui; Wang, Peng; Su, Panpan] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China",,"The development of non-precious metal catalysts for oxygen reduction reactions (ORRs) is of extreme importance for the construction of efficient H-2/O-2 polymer electrolyte membrane fuel cells (PEMFCs), one of the most promising clean energy technologies. Herein, we report the fabrication of core-shell structured CNTs@Fe-N-C composites with a Fe-N-C shell closely wrapped around a core of CNTs (carbon nanotubes) as efficient catalysts for ORR. CNTs@Fe-N-C composites afford comparable activity to commercial Pt/C catalysts with a loading of 20 mu g Pt cm(-2) towards ORR in alkaline media. The results of XRD, TEM. XPS and Fe-57 MOssbauer characterizations suggest that the high ORR activity of CNTs@.FeN-C composites are mainly attributed to the combined advantages of the unique core-shell nanostructure allowing close contact between Fe-N-C and CNTs, uniformly distributed FeN4/C species, and the presence of pyridine and graphitic nitrogen.",,DOPED CARBON NANOTUBES; FUEL-CELL CATHODE; IRON; CATALYSTS; POLYANILINE; GRAPHENE; SITES; MEDIA,DOPED CARBON NANOTUBES;FUEL-CELL CATHODE;IRON;CATALYSTS;POLYANILINE;GRAPHENE;SITES;MEDIA,zhgshao@dicp.ac.cn; yangqh@dicp.ac.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000339535100030,2-s2.0-84904111186,China,dicp.ac.cn,Chinese Acad Sci,"Chinese Acad Sci, China","Yao, Yi; Xiao, Hui; Wang, Peng; Su, Panpan; Shao, Zhigang; Yang, Qihua"
"Ma, Y.W., Zhang, H.M., Zhong, H.X., Xu, T., Jin, H., Tang, Y.F., Xu, Z.A.",Cobalt based non-precious electrocatalysts for oxygen reduction reaction in proton exchange membrane fuel cells,2010,ELECTROCHIMICA ACTA,55,27,,7945,7950,6,33,10.1016/j.electacta.2010.03.087,,"[Ma, Yuanwei; Zhang, Huamin; Zhong, Hexiang; Xu, Ting; Jin, Hong; Tang, Yongfu; Xu, Zhuang] Chinese Acad Sci, Dalian Inst Chem Phys, PEMFC Key Mat & Technol Lab, Dalian 116023, Peoples R China; [Ma, Yuanwei; Xu, Ting; Jin, Hong; Tang, Yongfu; Xu, Zhuang] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China",,Cobalt based non-precious metal catalysis were synthesized using chelation of cobalt (II) by imidazole followed by heat-treatment process and investigated as a promising alternative of platinum (Pt)-based electrocatalysts in proton exchange membrane fuel cells (PEMFCs) Transmission electron microscopy (TEM) X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) measurements were used to characterize the synthesized CoNx/C catalysts The activities of the catalysts towards oxygen reduction reaction (ORR) were investigated by electrochemical measurements and single cell tests respectively Optimization of the heat-treatment temperature was also explored The results indicate that the as-prepared catalyst presents a promising electrochemical activity for the ORR with an approximate four-electron process The maximum power density obtained in a H-2/O-2 PEMFC is as high as 200 mWcm(-2) with CoNx/C loading of 20 mg cm(-2) (C) 2010 Elsevier Ltd All rights reserved,Proton exchange membrane fuel cells; Non precious metal catalyst; Electrocatalyst; Oxygen reduction reaction; Nanocomposite,CO-BASED CATALYSTS; CARBON-BLACK; PYROLYSIS; ELECTROREDUCTION; NANOPARTICLES; POLYPYRROLE; TEMPERATURE; STABILITY; ELECTRODE; PEROXIDE,Proton exchange membrane fuel cells;Non precious metal catalyst;Electrocatalyst;Oxygen reduction reaction;Nanocomposite;CO-BASED CATALYSTS;CARBON-BLACK;PYROLYSIS;ELECTROREDUCTION;NANOPARTICLES;POLYPYRROLE;TEMPERATURE;STABILITY;ELECTRODE;PEROXIDE,,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",60th Annual Meeting of ISE,"Peking Univ, Beijing, PEOPLES R CHINA","AUG 16-21, 2009",PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article; Proceedings Paper,WoS,Electrochemistry,WOS:000284434700024,2-s2.0-77958085779,China,No email,Chinese Acad Sci,"Chinese Acad Sci, China","Ma, Yuanwei; Zhang, Huamin; Zhong, Hexiang; Xu, Ting; Jin, Hong; Tang, Yongfu; Xu, Zhuang"
"Chu, Y., Jiang, Q.L., Chang, L.Y., Jin, Y.H., Wang, R.Z.",Cobalt nanoparticles embedded in nitrogen-doped porous carbon derived the electrodeposited ZnCo-ZIF for high-performance ORR electrocatalysts,2023,JOURNAL OF ELECTROANALYTICAL CHEMISTRY,928,,117041,,,9,13,10.1016/j.jelechem.2022.117041,,"[Chu, Ying; Jiang, Qian-Lei; Chang, Li -Yuan; Jin, Yu -Hong; Wang, Ru-Zhi] Beijing Univ Technol, Inst Adv Energy Mat & Devices, Fac Mat & Mfg, Key Lab Adv Funct Mat,Educ Minist China, Beijing 100124, Peoples R China",,"Non-precious metal catalysts are believed to be the catalysts with great promise for oxygen reduction reaction (ORR) since the low cost and good electrocatalytic selectivity. In this work, Co particles coated with nitrogen -doped porous carbon (Co@NC) are obtained to the carbonization of the ZnCo-ZIF materials, which are pro-duced by a facile electrodeposition method. The obtained Co@NC catalyst displays an outstanding ORR prop-erty of a half-wave potential of 0.895 V (vs Hg/HgO) in 0.1 M KOH liquor, better than the commercial benchmark catalyst Pt/C (0.840 V). Meanwhile, the limited diffusion current density of our Co@NC catalyst reaches 4.6 mA/cm2, and it is approach to Pt/C (5.0 mA/cm2). It also shows the superior methanol-tolerance ability and excellent stability. The numerous active sites for catalytic from ZnCo-ZIF and the high electrical con-ductivity from graphite carbon lead to the excellent ORR property of the catalyst. And the stable core-shell structure by electrodeposition method to promote the stable performance. This work put forwards some char-acteristic insights into designing high cost-effective platinum-free catalysts in the application of the proton exchange membrane fuel cells.",Non-precious metal catalysts; Electrodeposition; Co nanoparticles; Nitrogen-doped carbon; Oxygen reduction reaction,OXYGEN REDUCTION REACTION; EFFICIENT OXYGEN; NANOSHEETS; CATALYSTS; SULFUR; SIZE,Non-precious metal catalysts;Electrodeposition;Co nanoparticles;Nitrogen-doped carbon;Oxygen reduction reaction;EFFICIENT OXYGEN;NANOSHEETS;CATALYSTS;SULFUR;SIZE,jinyh@bjut.edu.cn; wrz@bjut.edu.cn,,"PO BOX 564, 1001 LAUSANNE, SWITZERLAND",,,,ELSEVIER SCIENCE SA,1572-6657,,,,English,J ELECTROANAL CHEM,Article,WoS,Chemistry; Electrochemistry,WOS:000903957000002,2-s2.0-85144602774,China,bjut.edu.cn,Beijing Univ Technol,"Beijing Univ Technol, China","Chu, Ying; Jiang, Qian-Lei; Chang, Li -Yuan; Jin, Yu -Hong; Wang, Ru-Zhi"
"Ampurdanes, J., Chourashiya, M., Urakawa, A.",Cobalt oxide-based materials as non-PGM catalyst for HER in PEM electrolysis and in situ XAS characterization of its functional state,2019,Catalysis Today,336,,,161,168,,32,10.1016/j.cattod.2018.12.033,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85058701295&doi=10.1016%2Fj.cattod.2018.12.033&partnerID=40&md5=ee84df5b2b73ad5316eaa88d30c55206,"Barcelona Institute of Science and Technology (BIST), Barcelona, Spain","Ampurdanés, Jordi, Barcelona Institute of Science and Technology (BIST), Barcelona, Spain; Chourashiya, Muralidhar G., Barcelona Institute of Science and Technology (BIST), Barcelona, Spain; Urakawa, Atsushi, Barcelona Institute of Science and Technology (BIST), Barcelona, Spain","The polymer electrolyte membrane (PEM)-based electrolysis technology is a promising mean to split water and store renewable energy in the form of clean fuel, hydrogen. However, its high price due to the use of platinum group metals (PGMs) as catalyst materials generally makes the technology cost-restrictive. Herein we present the performance evaluation of cobalt oxide in PEM electrolysis as cathode catalyst where hydrogen evolution reaction (HER) takes place. Performance comparison of non-PGM catalysts (CoO, Co<inf>3</inf>O<inf>4</inf> and MoS<inf>2</inf>) revealed that better performance was attained with Co<inf>3</inf>O<inf>4</inf> and it was further improved by mixing with an electrically conducting carbon material (Vulcan). An optimum amount of the carbon additive was found, and the best performance was recorded at 47 wt% Co<inf>3</inf>O<inf>4</inf> over the total amount. At 2.05 V, 47 wt% Co<inf>3</inf>O<inf>4</inf>-based catalyst (0.55 A/cm2) outperformed 47 wt% MoS<inf>2</inf>-based one (0.51 A/cm2). More importantly, the performance of the former at 2.3 V (1.12 A/cm2) surpassed even that of Pt-black (1.11 A/cm2). In situ XAS study of the Co<inf>3</inf>O<inf>4</inf>-based material under PEM electrolysis conditions revealed dynamic interchange of Co3+ and Co2+ fractions, which was attributed to ultimately boost the HER performance. © 2018 Elsevier B.V.",Carbon; Co3O4; Hydrogen evolution reaction (HER); PEM water electrolysis; X-ray absorption spectroscopy (XAS),Carbon; Catalysts; Cobalt compounds; Electrolysis; Fuels; Layered semiconductors; Molybdenum compounds; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Water absorption; X ray absorption spectroscopy; Co3O4; Hydrogen evolution reactions; PEM water electrolysis; Performance comparison; Performance evaluations; Platinum group metals; Polymer electrolyte membranes; Renewable energies; Vanadium compounds,Carbon;Co3O4;Hydrogen evolution reaction (HER);PEM water electrolysis;X-ray absorption spectroscopy (XAS);Catalysts;Cobalt compounds;Electrolysis;Fuels;Layered semiconductors;Molybdenum compounds;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Water absorption;X ray absorption spectroscopy;Hydrogen evolution reactions;Performance comparison;Performance evaluations;Platinum group metals;Polymer electrolyte membranes;Renewable energies;Vanadium compounds,"A. Urakawa; Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Tarragona, Av. Països Catalans 16, 43007, Spain; email: aurakawa@iciq.es",,,,,,Elsevier B.V.,09205861,,CATTE,,English,Catal Today,Article,Scopus,,2-s2.0-85058701295,,Spain,iciq.es,,,"Ampurdanes, J.; Chourashiya, M.; Urakawa, A."
"Zang, J., Wang, F., Cheng, Q., Wang, G., Ma, L., Chen, C., Yang, L., Zou, Z., Xie, D., Yang, H.",Cobalt/zinc dual-sites coordinated with nitrogen in nanofibers enabling efficient and durable oxygen reduction reaction in acidic fuel cells,2020,Journal of Materials Chemistry A,8,7,,3686,3691,,98,10.1039/c9ta12207a,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85081102001&doi=10.1039%2Fc9ta12207a&partnerID=40&md5=194f23673b5e1381d50e1f9ba5025edf,"Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; University of Chinese Academy of Sciences, Beijing, China; Institute of Theoretical and Computational Chemistry, Nanjing University, Nanjing, Jiangsu, China","Zang, Jian, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China, University of Chinese Academy of Sciences, Beijing, China; Wang, Feiteng, Institute of Theoretical and Computational Chemistry, Nanjing University, Nanjing, Jiangsu, China; Cheng, Qingqing, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China, University of Chinese Academy of Sciences, Beijing, China; Wang, Guoliang, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; Ma, Lushan, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China, University of Chinese Academy of Sciences, Beijing, China; Chen, Chi, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; Yang, Lijun, Institute of Theoretical and Computational Chemistry, Nanjing University, Nanjing, Jiangsu, China; Zou, Zhiqiang, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; Xie, Daiqian, Institute of Theoretical and Computational Chemistry, Nanjing University, Nanjing, Jiangsu, China; Yang, Hui, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China","The key to reducing the cost of proton-exchange-membrane fuel cells (PEMFCs) is to develop highly efficient non-precious metal catalysts for the oxygen reduction reaction (ORR). Herein, we fabricated Co/Zn atomic dual-sites anchored on N doped carbon nanofibers (Co/Zn-NCNF) via electrospinning, carbonization and post-treatment technologies. Aberration-corrected STEM microscopy verifies the existence of uniformly dispersed Co/Zn atomic pairs within the NCNF. X-ray adsorption fine structure spectroscopy combined with the fitting and calculated results further ascertain the coordination structure of Co/Zn dual-sites with a configuration of N<inf>2</inf>CoN<inf>2</inf>ZnN<inf>2</inf>. Such a Co/Zn-NCNF catalyst exhibits greatly enhanced ORR activity with onset and half-wave potentials of 0.997 V and 0.797 V/RHE in an acidic electrolyte, compared to the Co or Zn mono-doped sample. Density functional theory calculations reveal that the novel N<inf>2</inf>CoN<inf>2</inf>ZnN<inf>2</inf> structure, different from the traditional Co-N<inf>4</inf> or Zn-N<inf>4</inf>, could largely lower the dissociative barrier of the ∗OOH intermediate during the ORR, thereby boosting the electrocatalytic activity. Finally, the H<inf>2</inf>-O<inf>2</inf> PEMFC assembled using Co/Zn-NCNF as a cathodic catalyst displays a maximum power density of 0.603 W cm-2 together with a remarkable stability of ca. 0.65 V after 150 h discharging at a current density of 400 mA cm-2, paving the way for the future development of non-precious metal PEMFCs. © 2020 The Royal Society of Chemistry.",,Carbon nanofibers; Carbonization; Catalysts; Cobalt; Coordination reactions; Density functional theory; Doping (additives); Electrolytes; Electrolytic reduction; Nitrogen; Oxygen; Oxygen reduction reaction; Precious metals; Zinc compounds; Aberration-corrected STEM; Acidic electrolytes; Coordination structures; Electrocatalytic activity; Fine-structure spectroscopy; Maximum power density; Non-precious metal catalysts; Proton exchange membrane fuel cell (PEMFCs); Proton exchange membrane fuel cells (PEMFC),Carbon nanofibers;Carbonization;Catalysts;Cobalt;Coordination reactions;Density functional theory;Doping (additives);Electrolytes;Electrolytic reduction;Nitrogen;Oxygen;Oxygen reduction reaction;Precious metals;Zinc compounds;Aberration-corrected STEM;Acidic electrolytes;Coordination structures;Electrocatalytic activity;Fine-structure spectroscopy;Maximum power density;Non-precious metal catalysts;Proton exchange membrane fuel cell (PEMFCs);Proton exchange membrane fuel cells (PEMFC),,,,,,,Royal Society of Chemistry,20507488,,JMCAE,,English,J. Mater. Chem. A,Article,Scopus,,2-s2.0-85081102001,,China,No email,,,"Zang, J.; Wang, F.; Cheng, Q.; Wang, G.; Ma, L.; Chen, C.; Yang, L.; Zou, Z.; Xie, D.; Yang, H."
"Elvington, M.C., Chung, H.T., Lin, L., Yin, X., Ganesan, P., Zelenay, P., Colon-Mercado, H.R.",Communication-on the lack of correlation between the voltammetric redox couple and orr activity of fe-n-c catalysts,2020,Journal of the Electrochemical Society,167,13,abb97c,,,,6,10.1149/1945-7111/abb97c,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85092440008&doi=10.1149%2F1945-7111%2Fabb97c&partnerID=40&md5=656bb031541a7e3c4981e588b64f2076,"Energy Materials, Savannah River National Laboratory, Aiken, SC, United States; Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China","Elvington, Mark C., Energy Materials, Savannah River National Laboratory, Aiken, SC, United States; Chung, Hoon Taek, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Lin, Ling, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Yin, Xi, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Ganesan, Prabhu, Energy Materials, Savannah River National Laboratory, Aiken, SC, United States; Zelenay, Piotr S., Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Colón-Mercado, Héctor R., Energy Materials, Savannah River National Laboratory, Aiken, SC, United States","Platinum group metal-free catalysts for polymer electrolyte fuel cells are analyzed in different electrolytes (H<inf>2</inf>SO<inf>4</inf> and HClO<inf>4</inf>) and at different pH values to gain insight into the oxygen reduction reaction (ORR) mechanism. Two Fe-N-C type catalysts showing a reversible voltammetric redox couple around 0.77 V vs RHE in HClO<inf>4</inf> electrolyte are investigated. A notable cathodic shift of the redox couple to 0.62 V is observed in H<inf>2</inf>SO<inf>4</inf> and is assigned to bisulfate adsorption. Concurrently, the ORR activity of the catalysts is unaffected, suggesting an independent nature of the reductive mechanism with the redox peak species. © 2020 The Electrochemical Society",,Catalyst activity; Chlorine compounds; Electrolytic reduction; Iron compounds; Oxygen reduction reaction; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Cathodic shifts; Gain insight; Orr activities; Platinum group metals; Polymer electrolyte fuel cells; Redox couple; Redox peaks; Voltammetric; Polyelectrolytes,Catalyst activity;Chlorine compounds;Electrolytic reduction;Iron compounds;Oxygen reduction reaction;Proton exchange membrane fuel cells (PEMFC);Solid electrolytes;Cathodic shifts;Gain insight;Orr activities;Platinum group metals;Polymer electrolyte fuel cells;Redox couple;Redox peaks;Voltammetric;Polyelectrolytes,"P. Zelenay; Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, 87545, United States; email: zelenay@lanl.gov",,,,,,IOP Publishing Ltd custserv@iop.org,00134651,,JESOA,,English,J Electrochem Soc,Article,Scopus,,2-s2.0-85092440008,,United States;China,lanl.gov,,,"Elvington, M.C.; Chung, H.T.; Lin, L.; Yin, X.; Ganesan, P.; Zelenay, P.; Colon-Mercado, H.R."
"Mazzucato, M., Durante, C.",Comparative Analysis of Rotating Electrode and Gas Diffusion Electrode Methods for Assessing Activity and Stability of Fe-N-C Based Catalysts in ORR,2023,Electrochimica Acta,463,,142801,,,,22,10.1016/j.electacta.2023.142801,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85164227340&doi=10.1016%2Fj.electacta.2023.142801&partnerID=40&md5=5f56438efe46b38e1acc6186599f076d,"Department of Chemical Sciences, Università degli Studi di Padova, Padua, PD, Italy","Mazzucato, Marco, Department of Chemical Sciences, Università degli Studi di Padova, Padua, PD, Italy; Durante, Christian, Department of Chemical Sciences, Università degli Studi di Padova, Padua, PD, Italy","Rotating (ring) disk electrode (R(R)DE) voltammetry is considered a simple means of benchmarking the oxygen reduction reaction (ORR) activity of platinum-free electrocatalysts for proton exchange membrane fuel cells or hydrogen peroxide electrocatalysts. However, the R(R)DE methodology has shown high variability across laboratories and reproducible ORR activities can be obtained when a strict experimental protocol is followed. Despite this, objections in the literature have been raised regarding the usefulness of screening measurements on RRDEs in identifying a good catalyst that maintains the same performance when switching from the RRDE to a gas diffusion electrode (GDE). As a result, new experimental approaches have been proposed in the literature to better evaluate a catalyst under conditions similar to those of a fuel cell or an electrolyzer. Our study, along with others, points out that even with a new electrochemical set-up, the dominant factors in the screening experimental protocol include the ink formulation, electrocatalyst film quality, and electrochemical procedures. In this study, a platinum-free Fe-N-C type catalyst (Fe2XC72) is considered a benchmark electrocatalyst for ORR. The activity and selectivity performances of the catalyst are evaluated and compared on an RRDE, a half-cell with a GDE electrode, and an H-cell with a GDE electrode but with a larger surface area. The impact of various experimental parameters, including catalyst loading and pH, on the electrocatalytic activity and selectivity, are evaluated and the different techniques, although not completely comparable, manage on individual aspects to produce similar if not overlapping results. Furthermore, explicit experimental procedures and measurement protocols are reviewed and revised. © 2023 Elsevier Ltd",Electrocatalysis; GDE; H2O2; ORR; PEMFC; PGM-free,Benchmarking; Catalyst selectivity; Diffusion in gases; Electrocatalysis; Electrocatalysts; Electrodes; Electrolysis; Electrolytic reduction; Iron compounds; Platinum; Electrochemicals; Experimental protocols; Gas diffusion electrodes; H 2O 2; Oxygen reduction reaction; P.E.M.F.C; Performance; PGM-free; Reaction activity; ]+ catalyst; Proton exchange membrane fuel cells (PEMFC),Electrocatalysis;GDE;H2O2;ORR;PEMFC;PGM-free;Benchmarking;Catalyst selectivity;Diffusion in gases;Electrocatalysts;Electrodes;Electrolysis;Electrolytic reduction;Iron compounds;Platinum;Electrochemicals;Experimental protocols;Gas diffusion electrodes;H 2O 2;Oxygen reduction reaction;P.E.M.F.C;Performance;Reaction activity;]+ catalyst;Proton exchange membrane fuel cells (PEMFC),"C. Durante; Department of Chemical Sciences, University of Padova, via Marzolo 1, Padova, 35131, Italy; email: christian.durante@unipd.it",,,,,,Elsevier Ltd,00134686,,ELCAA,,English,Electrochim Acta,Article,Scopus,,2-s2.0-85164227340,,Italy,unipd.it,,,"Mazzucato, M.; Durante, C."
"Charalampopoulos, G., Daletou, M.K.",Comparative development and evaluation of Fe-N-C electrocatalysts for the oxygen reduction reaction: The effect of pyrolysis and iron-bipyridine structures,2025,MATERIALS REPORTS: ENERGY,5,2,100328,,,10,4,10.1016/j.matre.2025.100328,,"[Charalampopoulos, Georgios; Daletou, Maria K.] FORTH ICEHT, Fdn Res & Technol, Hellas Inst Chem Engn Sci, Stadiou Str,POB 1414, GR-26504 Patras, Greece; [Charalampopoulos, Georgios] Univ Patras, Chem Dept, Patras 26504, Greece",,"Proton exchange membrane fuel cells (PEMFCs) constitute a promising avenue for environmentally friendly power generation. However, the reliance on unsustainable platinum-based electrocatalysts used at the electrodes poses challenges to the commercial viability of PEMFCs. Non-platinum group metal (non-PGM) alternatives, like nitrogen-coordinated transition metals in atomic dispersion (M-N-C catalysts), show significant potential. This work presents a comparative study of two distinct sets of Fe-N-C materials, prepared by pyrolyzing hybrid composites of polyaniline (PANI) and iron (II) chloride on a hard template. One set uses bipyridine (BPy) as an additional nitrogen source and iron ligand, offering an innovative approach. The findings reveal that the choice of pyrolysis temperature and atmosphere influences the catalyst properties. The use of ammonia in pyrolysis emerges as a crucial parameter for promoting atomic dispersion of iron, as well as increasing surface area and porosity. The optimal catalyst, prepared using BPy and ammonia, exhibits a half-wave potential of 0.834 V in 0.5 M H2SO4 (catalyst loading of 0.6 mg cm-2), a mass activity exceeding 3 A g-1 and high stability in acidic electrolyte, positioning it as a promising non-PGM structure in the field.",PEM fuel cells; Oxygen reduction reaction; Non-PGM electrocatalysts; ORR activity; Fe-N-C structures,HIGH-PERFORMANCE; ACTIVE-SITES; CATALYSTS; HYDROGEN; SYSTEM,PEM fuel cells;Oxygen reduction reaction;Non-PGM electrocatalysts;ORR activity;Fe-N-C structures;HIGH-PERFORMANCE;ACTIVE-SITES;CATALYSTS;HYDROGEN;SYSTEM,riadal@iceht.forth.gr,,"16 DONGHUANGCHENGGEN NORTH ST, Building 5, Room 411, BEIJING, DONGCHENG DISTRICT 100009, PEOPLES R CHINA",,,,KEAI PUBLISHING LTD,,,,,English,MATER REP-ENERGY,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:001514946400001,2-s2.0-105001880930,Greece,iceht.forth.gr,FORTH ICEHT;Univ Patras,"FORTH ICEHT, Greece;Univ Patras, Greece","Charalampopoulos, Georgios; Daletou, Maria K."
"Yuan, X.X., Sha, H.D., Ding, X.L., Kong, H.C., Lin, H., Wen, W., Huang, T.Z., Guo, Z., Ma, Z.F., Yang, Y.",Comparative investigation on the properties of carbon-supported cobalt-polypyrrole pyrolyzed at various conditions as electrocatalyst towards oxygen reduction reaction,2014,INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,39,28,,15937,15947,11,11,10.1016/j.ijhydene.2014.03.205,,"[Yuan, Xianxia; Sha, Hao-Dong; Ding, Xin-Long; Kong, Hai-Chuan; Ma, Zi-Feng] Shanghai Jiao Tong Univ, Dept Chem Engn, Shanghai 200240, Peoples R China; [Lin, He; Wen, Wen; Guo, Zhi] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China; [Yang, Yong] Xiamen Univ, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China; [Yang, Yong] Xiamen Univ, Dept Chem, Xiamen 361005, Peoples R China; [Ding, Xin-Long] Shanghai Keyuan Chem & Gas Engn Design Co Ltd, Shanghai 200235, Peoples R China; [Huang, Taizhong] Univ jinan, Sch Chem & Chem Engn, Shandong Prov Key Lab Fluorine Chem & Chem Mat, Jinan 250022, Shandong, Peoples R China",,"A series of non-precious metal catalysts named as Co-PPy-TsOH/C towards oxygen reduction reaction (ORR) were synthesized by pyrolyzing carbon supported cobalt-polypyrrole at various temperatures for diverse durations. The catalytic activity of these catalysts was evaluated with electrochemical techniques of cyclic voltammetry, rotating disk electrode and rotating ring-disk electrode. Physicochemical techniques, such as XRD, TEM and XPS, were employed to characterize the structure/morphology of the catalysts in order to understand the effects of pyrolysis conditions on the ORR activity. The results showed that both pyrolysis temperature and the duration have essential effects on the structure/morphology as well as ORR activity of the Co-PPy-TsOH/C catalysts, pyrolyzing the precursor at 800 degrees C for 2 h is the optimal condition to synthesize the catalyst with the best ORR performance. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.",Oxygen reduction reaction; Non-precious metal catalysts; Pyrolysis conditions,PEM FUEL-CELLS; ALKALINE-MEDIUM; CATALYSTS; PERFORMANCE; NITROGEN; POLYMER; ACID; ELECTROCHEMISTRY; PYRROLE; BLACK,Oxygen reduction reaction;Non-precious metal catalysts;Pyrolysis conditions;PEM FUEL-CELLS;ALKALINE-MEDIUM;CATALYSTS;PERFORMANCE;NITROGEN;POLYMER;ACID;ELECTROCHEMISTRY;PYRROLE;BLACK,yuanxx519@163.com,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",International Conference on Electrochemical Materials and Technologies for Clean Sustainable Energy (ICES),"Guangzhou, PEOPLES R CHINA","JUL 05-09, 2013",PERGAMON-ELSEVIER SCIENCE LTD,0360-3199,,,,English,INT J HYDROGEN ENERG,Article; Proceedings Paper,WoS,Chemistry; Electrochemistry; Energy & Fuels,WOS:000342861500073,,China,163.com,Shanghai Jiao Tong Univ;Chinese Acad Sci;Xiamen Univ;Shanghai Keyuan Chem & Gas Engn Design Co Ltd;Univ jinan,"Shanghai Jiao Tong Univ, China;Chinese Acad Sci, China;Xiamen Univ, China;Shanghai Keyuan Chem & Gas Engn Design Co Ltd, China;Univ jinan, China","Yuan, Xianxia; Sha, Hao-Dong; Ding, Xin-Long; Kong, Hai-Chuan; Lin, He; Wen, Wen; Huang, Taizhong; Guo, Zhi; Ma, Zi-Feng; Yang, Yong"
"Savastenko, N.A., Anklam, K., Quade, A., Bruser, M., Schmuhl, A., Bruser, V.",Comparative study of plasma-treated non-precious catalysts for oxygen and hydrogen peroxide reduction reactions,2011,Energy and Environmental Science,4,9,,3461,3472,,21,10.1039/c1ee01163d,https://www.scopus.com/inward/record.uri?eid=2-s2.0-80052198399&doi=10.1039%2Fc1ee01163d&partnerID=40&md5=17874d313fd24799ef6bf2f58f40781c,"Leibniz-Institut für Plasmaforschung und Technologie e.V., Greifswald, Germany; AMT Analysenmesstechnik GmbH, Rostock, Germany","Savastenko, Natalie A., Leibniz-Institut für Plasmaforschung und Technologie e.V., Greifswald, Germany; Anklam, Kirsten, Leibniz-Institut für Plasmaforschung und Technologie e.V., Greifswald, Germany; Quade, Antje, Leibniz-Institut für Plasmaforschung und Technologie e.V., Greifswald, Germany; Brüser, Manuela, Leibniz-Institut für Plasmaforschung und Technologie e.V., Greifswald, Germany; Schmuhl, Andreas, AMT Analysenmesstechnik GmbH, Rostock, Germany; Brüser, Volker, Leibniz-Institut für Plasmaforschung und Technologie e.V., Greifswald, Germany","The performance of plasma-treated non-precious catalysts is discussed in the light of their application for oxygen and hydrogen peroxide reduction reactions. Six different Fe and Co porphyrins and phthalocyanines were used as precursors. The precursors were mixed with a carbon support and treated with an Ar-, N <inf>2</inf>- and Ar:O <inf>2</inf>-radio frequency (RF) plasma to obtain carbon supported Fe-N/C or Co-N/C catalysts. Additionally, the effect of plasma pretreatment of the catalyst's support was studied. The electrochemical properties of these catalysts were evaluated by cyclic voltammetry (CV) and rotating disc electrode (RDE) techniques (ORR) and for hydrogen peroxide (H <inf>2</inf>O <inf>2</inf>) reduction reaction. The difference in activity of the porphyrin-based catalyst treated by plasma and the Pt catalyst was less for H <inf>2</inf>O <inf>2</inf> reduction reaction than for ORR. Selected samples were also tested in a HCOOH/H <inf>2</inf>O <inf>2</inf> proton exchange membrane fuel cell (PEMFC). The maximum power of the HCOOH/H <inf>2</inf>O <inf>2</inf> fuel cell with plasma treated catalyst was 1.4-fold higher than that of the fuel cell with noble metal based catalysts (Pt/C). The catalysts were also characterized in terms of their morphology, structure and composition by atomic force microscopy (AFM), attenuated total reflection infrared spectroscopy (ATR FT-IR), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). A correlation was found between the activity and concentration of nitrogen on the surface of the catalysts. The AFM investigations revealed morphological changes which accompanied the transformation of the catalyst precursor into the catalytic material. © 2011 The Royal Society of Chemistry.",,A-carbon; AFM; ATR FTIR; Attenuated total reflection infrared spectroscopy; Catalyst precursors; Catalytic materials; Comparative studies; Hydrogen peroxide reduction; Maximum power; Morphological changes; Non-precious catalysts; Plasma pre-treatment; Pt catalysts; Radio frequency plasma; Reduction reaction; Rotating disc electrode; Atomic force microscopy; Atomic spectroscopy; Cyclic voltammetry; Electrochemical properties; Hydrogen; Hydrogen peroxide; Infrared spectroscopy; Oxidation; Oxygen; Photoelectron spectroscopy; Plasmas; Platinum; Porphyrins; Precious metals; Proton exchange membrane fuel cells (PEMFC); Reduction; X ray diffraction; X ray photoelectron spectroscopy; Catalyst supports; atomic force microscopy; catalyst; cobalt; comparative study; concentration (composition); electrochemistry; electrode; fuel cell; hydrogen peroxide; iron; oxygen; performance assessment; pigment; plasma; porphyrin; reduction; X-ray diffraction; X-ray spectroscopy,A-carbon;AFM;ATR FTIR;Attenuated total reflection infrared spectroscopy;Catalyst precursors;Catalytic materials;Comparative studies;Hydrogen peroxide reduction;Maximum power;Morphological changes;Non-precious catalysts;Plasma pre-treatment;Pt catalysts;Radio frequency plasma;Reduction reaction;Rotating disc electrode;Atomic force microscopy;Atomic spectroscopy;Cyclic voltammetry;Electrochemical properties;Hydrogen;Hydrogen peroxide;Infrared spectroscopy;Oxidation;Oxygen;Photoelectron spectroscopy;Plasmas;Platinum;Porphyrins;Precious metals;Proton exchange membrane fuel cells (PEMFC);Reduction;X ray diffraction;X ray photoelectron spectroscopy;Catalyst supports;catalyst;cobalt;comparative study;concentration (composition);electrochemistry;electrode;fuel cell;iron;performance assessment;pigment;plasma;porphyrin;X-ray diffraction;X-ray spectroscopy,"N.A. Savastenko; Leibniz-Institute for Plasma Science and Technology, 17489, Greifswald, 2 Felix-Hausdorff-Strasse, Germany; email: savastenko@inp-greifswald.de",,,,,,,17545692,,,,English,Energy Environ. Sci.,Article,Scopus,,2-s2.0-80052198399,,Germany,inp-greifswald.de,,,"Savastenko, N.A.; Anklam, K.; Quade, A.; Bruser, M.; Schmuhl, A.; Bruser, V."
"Pedersen, A., Pandya, J., Leonzio, G., Serov, A., Bernardi, A., Stephens, I.E.L., Titirici, M.M., Petit, C., Chachuat, B.",Comparative techno-economic and life-cycle analysis of precious versus non-precious metal electrocatalysts: the case of PEM fuel cell cathodes,2023,GREEN CHEMISTRY,25,24,,10458,10471,14,39,10.1039/d3gc03206j,,"[Pedersen, Angus; Stephens, Ifan E. L.] Imperial Coll London, Royal Sch Mines, Dept Mat, London SW7, England; [Pedersen, Angus; Pandya, Jinil; Leonzio, Grazia; Bernardi, Andrea; Titirici, Maria-Magdalena; Petit, Camille; Chachuat, Benoit] Imperial Coll London, Dept Chem Engn, London SW7, England; [Leonzio, Grazia] Univ Cagliari, Dept Mech Chem & Mat Engn, via Marengo 2, I-09123 Cagliari, Italy; [Serov, Alexey] Oak Ridge Natl Lab, Electrificat & Energy Infrastruct Div, Oak Ridge, TN USA; [Bernardi, Andrea; Chachuat, Benoit] Imperial Coll London, Sargent Ctr Proc Syst Engn, London SW7 2AZ, England; [Titirici, Maria-Magdalena] Tohoku Univ, Adv Inst Mat Res WPI AIMR, 2-1-1 Katahira, Aoba Ku, Sendai, Miyagi 9808577, Japan",,"Sluggish kinetics in the oxygen reduction reaction (ORR) require significant quantities of expensive Pt-based nanoparticles on carbon (Pt/C) at the cathode of proton exchange membrane fuel cells (PEMFCs). This catalyst requirement hinders their large-scale implementation. Single atom Fe in N-doped C (Fe-N-C) electrocatalysts offer the best non-Pt-based ORR activities to date, but their environmental impacts have not been studied and their production costs are rarely quantified. Herein, we report a comparative life-cycle assessment and techno-economic analysis of replacing Pt/C with Fe-N-C at the cathode of an 80 kW PEMFC stack. In the baseline scenario (20 g(Pt/C)vs. 690 g(Fe-N-C)), we estimate that Fe-N-C could reduce damages on ecosystems and human health by 88-90% and 30-44%, respectively, while still increasing global warming potential by 53-92% and causing a comparable impact on resource depletion. The environmental impacts of Pt/C predominantly arise from the Pt precursor while those of Fe-N-C are presently dominated by the electricity consumption. The monetized costs of environmental externalities for both Fe-N-C and Pt/C catalysts exceed their respective direct production costs. Based on catalyst performance with learning curve analysis at 500 000 PEMFC stacks per annum, we estimate replacing Pt/C with Fe-N-C would increase PEMFC stack cost from 13.8 to 41.6 USD per kW. The cost increases despite a reduction in cathode catalyst production cost from 3.41 to 0.79 USD per kW (excluding environmental externalities). To be cost-competitive with a Pt-based PEMFC stack delivering 2020 US Department of Energy target of 1160 mW cm(-2) (at 0.657 V), the same stack with an Fe-N-C cathode would need to reach 874 mW cm(-2), equivalent to a 200% performance improvement. These findings demonstrate the need for continued Fe-N-C activity development with sustainable synthesis routes in mind to replace Pt-based cathode catalyst in PEMFCs. Based on forecasting scenarios of fuel cell vehicle deployment targets, we find that Pt consumption would be constrained by Pt supply.",,OXYGEN REDUCTION; FREE CATALYSTS; IMPACT; OPTIMIZATION; COST,OXYGEN REDUCTION;FREE CATALYSTS;IMPACT;OPTIMIZATION;COST,b.chachuat@imperial.ac.uk,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,1463-9262,,,,English,GREEN CHEM,Article,WoS,Chemistry; Science & Technology - Other Topics,WOS:001108220100001,2-s2.0-85179093612,United Kingdom;Italy;United States;Japan,imperial.ac.uk,Imperial Coll London;Univ Cagliari;Oak Ridge Natl Lab;Tohoku Univ,"Imperial Coll London, United Kingdom;Univ Cagliari, Italy;Oak Ridge Natl Lab, United States;Tohoku Univ, Japan","Pedersen, Angus; Pandya, Jinil; Leonzio, Grazia; Serov, Alexey; Bernardi, Andrea; Stephens, Ifan E. L.; Titirici, Maria-Magdalena; Petit, Camille; Chachuat, Benoit"
"Bevilacqua, N., Gokhale, R., Serov, A., Banerjee, R., Schmid, M., Atanassov, P., Zeis, R.","Comparing Novel PGM-Free, Platinum, and Alloyed Platinum Catalysts for HT-PEMFCs",2018,POLYMER ELECTROLYTE FUEL CELLS AND ELECTROLYZERS 18 (PEFC&E 18),86,13,,221,229,9,13,10.1149/08613.0221ecst,,"[Bevilacqua, N.; Banerjee, R.; Schmid, M.; Zeis, R.] Helmholtz Inst Ulm HIU, Karlsruhe Inst Technol KIT, D-89081 Ulm, Germany; [Gokhale, R.; Serov, A.; Atanassov, P.] Univ New Mexico, Ctr Microengn Mat CMEM, Albuquerque, NM 87131 USA; [Gokhale, R.; Serov, A.; Atanassov, P.] Univ New Mexico, Chem & Biol Engn Dept, Albuquerque, NM 87131 USA; [Zeis, R.] Inst Phys Chem, Karlsruhe Inst Technol KIT, D-76131 Karlsruhe, Germany",,"Electrochemical Impedance Spectroscopy (EIS) constitutes a well-established method for characterizing the losses in a polymer electrolyte membrane fuel cell (PEMFC). However, without further analysis, the EI spectrum yields only qualitative insight into the mechanism and contribution of each of the losses in the fuel cell. The distribution of relaxation times (DRT) method allows the quantification of each process contributing to the performance loss in the cell. The application of aforementioned methods for various catalysts allows the explanation of performance differences of the investigated catalysts based on the respective contribution of each major loss mechanism. We tested a platinum (Pt) catalyst, a platinum-cobalt (Pt3Co) alloy catalyst, and a platinum group metal-free (PGM-free) iron-nitrogen-carbon (Fe-N-C) catalyst and found that the Oxygen Reduction Reaction (ORR) is not the dominant loss factor. Against our expectation, the mass transport loss in the PGM-free catalyst is severely dominating. The higher performance of the alloy catalyst can be explained by both, an improved mass transport and a lower ORR resistivity.",,RELAXATION-TIMES; PERFORMANCE,RELAXATION-TIMES;PERFORMANCE,,"Jones, DJ; Gasteiger, H; Uchida, H; Schmidt, TJ; Buechi, F; SwiderLyons, KE; Pivovar, BS; Pintauro, PN; Ramani, VK; Fenton, JM; Strasser, P; Ayers, KE; Weber, AZ; Fuller, TF; Mantz, RA; Xu, H; Coutanceau, C; Mitsushima, S; Narayan, S; Shirvanian, P; Kim, YT; GochiPonce, Y","65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA",18th Symposium on Polymer Electrolyte Fuel Cells and Electrolyzers (PEFC and E) held during the AiMES Meeting / ECS and SMEQ Joint International Meeting,"Cancun, MEXICO","SEP 30-OCT 04, 2018",ELECTROCHEMICAL SOC INC,1938-5862,978-1-60768-860-0,,,English,ECS TRANSACTIONS,Proceedings Paper,WoS,Electrochemistry; Energy & Fuels,WOS:000542035400023,2-s2.0-85058326830,Germany;United States,No email,Helmholtz Inst Ulm HIU;Univ New Mexico;Inst Phys Chem,"Helmholtz Inst Ulm HIU, Germany;Univ New Mexico, United States;Inst Phys Chem, Germany","Bevilacqua, N.; Gokhale, R.; Serov, A.; Banerjee, R.; Schmid, M.; Atanassov, P.; Zeis, R."
"Yeoh, K.H., Chang, Y.H.R., Chew, K.H., Jiang, J., Yoon, T.L., Ong, D.S., Goh, B.T.",Computational Screening of a Single-Atom Catalyst Supported by Monolayer Nb2S2C for Oxygen Reduction Reaction,2024,LANGMUIR,40,7,,3569,3576,8,2,10.1021/acs.langmuir.3c03188,,"[Yeoh, K. H.] Sunway Univ, Jeffrey Sachs Ctr Sustainable Dev, Bandar Sunway 47500, Selangor, Malaysia; [Chang, Y. H. R.] Univ Teknol MARA, Fac Appl Sci, Kota Samarahan 94300, Sarawak, Malaysia; [Chew, K. -h.] Zhejiang Expo New Mat Co Ltd, Wenzhou 325802, Peoples R China; [Chew, K. -h.] Zhejiang Sci Tech Univ, Dept Phys, Key Lab Opt Field Manipulat Zhejiang Prov, Hangzhou 310018, Peoples R China; [Jiang, J.] Eindhoven Univ Technol, Mat Simulat & Modelling, Dept Appl Phys, NL-5612 Eindhoven, Netherlands; [Jiang, J.] Univ Rennes, ENSCR, CNRS, ISCR UMR6226, F-35000 Rennes, France; [Yoon, T. L.] Univ Sains Malaysia, Sch Phys, George Town 11800, Usm, Malaysia; [Ong, D. S.] Multimedia Univ, Fac Engn, Persiaran Multimedia, Cyberjaya 63100, Selangor, Malaysia; [Goh, B. T.] Univ Malaya, Fac Sci, Low Dimens Mat Res Ctr LDMRC, Dept Phys, Kuala Lumpur 50603, Malaysia",,"The search for high-performance catalysts to improve the catalytic activity for an oxygen reduction reaction (ORR) is crucial for developing a proton exchange membrane fuel cell. Using the first-principles method, we have performed computational screening on a series of transition metal (TM) atoms embedded in monolayer Nb2S2C to enhance the ORR activity. Through the scaling relationship and volcano plot, our results reveal that the introduction of a single Ni or Rh atom through substitutional doping into monolayer Nb2S2C yields promising ORR catalysts with low overpotentials of 0.52 and 0.42 V, respectively. These doped atoms remain intact on the monolayer Nb2S2C even at elevated temperatures. Importantly, the catalytic activity of the Nb2S2C doped with a TM atom can be effectively correlated with an intrinsic descriptor, which can be computed based on the number of d orbital electrons and the electronegativity of TM and O atoms.",,FUEL-CELL; TRENDS; ELECTROCATALYSIS; ELECTROLYSIS; OXIDATION; GRAPHENE; HYDROGEN; ORIGIN; WATER,FUEL-CELL;TRENDS;ELECTROCATALYSIS;ELECTROLYSIS;OXIDATION;GRAPHENE;HYDROGEN;ORIGIN;WATER,keathoey@sunway.edu.my; robincyh@uitm.edu.my,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,0743-7463,,,38329924,English,LANGMUIR,Article,WoS,Chemistry; Materials Science,WOS:001167250800001,2-s2.0-85187252052,Malaysia;China;Netherlands;France,sunway.edu.my,Sunway Univ;Univ Teknol MARA;Zhejiang Expo New Mat Co Ltd;Zhejiang Sci Tech Univ;Eindhoven Univ Technol;Univ Rennes;Univ Sains Malaysia;Multimedia Univ;Univ Malaya,"Sunway Univ, Malaysia;Univ Teknol MARA, Malaysia;Zhejiang Expo New Mat Co Ltd, China;Zhejiang Sci Tech Univ, China;Eindhoven Univ Technol, Netherlands;Univ Rennes, France;Univ Sains Malaysia, Malaysia;Multimedia Univ, Malaysia;Univ Malaya, Malaysia","Yeoh, K. H.; Chang, Y. H. R.; Chew, K. -h.; Jiang, J.; Yoon, T. L.; Ong, D. S.; Goh, B. T."
"Cho, A., Park, B.J., Han, J.W.",Computational Screening of Single-Metal-Atom Embedded Graphene-Based Electrocatalysts Stabilized by Heteroatoms,2022,Frontiers in Chemistry,10,,873609,,,,17,10.3389/fchem.2022.873609,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85128681977&doi=10.3389%2Ffchem.2022.873609&partnerID=40&md5=a2c6e72bc2213fef6fd5940148885119,"Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea","Cho, Ara, Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; Park, Byoung-joon, Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; Han, Jeongwoo, Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea","Metal-N-doped carbon is a promising replacement for non-precious-metal catalysts such as Pt for the oxygen reduction reaction (ORR) in polymer electrolyte membrane fuel cells (PEMFCs). Although these materials have relatively good catalytic activity and are cost-effective, they still have lower ORR activity than Pt, and so improving their performances is greatly required. In this study, high-throughput screening was employed based on density functional theory (DFT) calculations to search for good candidate catalysts with a transition metal atom coordinated by heteroatoms (B, N, S, O, and P) embedded in a graphene structure. In addition, coordinating a transition metal with two types of heteroatom dopants in a graphene structure was also considered. We calculated the binding energies of ORR intermediates on metal-heteroatom-based graphene structures because they are known to play a key role in ORR. Based on our results, the new group of electrocatalysts imparts excellent ORR activity for PEMFCs, and we suggest that our approach provides useful insight into exploring other promising candidate catalysts. © © 2022 Cho, Park and Han.",computational screening; electrocatalysts; heteroatom doping; metal-nitrogen-doped carbon; oxygen reduction reaction; single-metal-atom catalysts,,computational screening;electrocatalysts;heteroatom doping;metal-nitrogen-doped carbon;oxygen reduction reaction;single-metal-atom catalysts,"J.W. Han; Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, South Korea; email: jwhan@postech.ac.kr",,,,,,Frontiers Media S.A.,,,,,English,Front. Chem.,Article,Scopus,,2-s2.0-85128681977,,South Korea,postech.ac.kr,,,"Cho, A.; Park, B.J.; Han, J.W."
"Bao, C.Z., Yang, B.L., Zhai, L.L., Xiang, Z.H.",CoN4 active sites coupled with low-loading Pt as advanced oxygen electrocatalyst for proton exchange membrane fuel cells,2025,AICHE JOURNAL,71,6,e18763,,,9,1,10.1002/aic.18763,,"[Bao, Chunzhu; Yang, Bolong; Zhai, Lingling; Xiang, Zhonghua] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China; [Bao, Chunzhu] Longyuan Beijing New Energy Engn Design & Res Inst, Comprehens Energy Dept, Beijing, Peoples R China; [Yang, Bolong] Xian Polytech Univ, Sch Environm & Chem Engn, Xian Key Lab Text Chem Engn Auxiliaries, Xian, Peoples R China",,"Proton exchange membrane fuel cells (PEMFCs) are regarded as a cornerstone of next-generation energy conversion technologies due to zero emission and high energy efficiency. However, the high cost and scarcity of conventional Pt-based electrocatalysts hinder its commercialization. Herein, we successfully developed a platinum and cobalt bimetallic covalent organic polymer (Pt-CoNC) electrocatalyst with low Pt loading (0.96 wt%) for the oxygen reduction reaction (ORR) by integrating Pt sites with carbon materials featuring Co-N4 active centers. This unique structural design not only effectively mitigates the high cost associated with Pt-based catalysts but also notably boosts the activity and stability of non-precious metal catalysts. The results verified that the half-wave potential of Pt-CoNC in the acidic ORR was increased by 105 mV as compared with pure cobalt phthalocyanine-based covalent organic polymer (COP-Co). Furthermore, the as-assembled PEMFC device achieved a peak power density of 1.14 W cm-2 under an H2-O2 atmosphere, which is comparable to commercialized 20% Pt/C catalysts.",oxygen reduction reaction; proton exchange membrane fuel cells; Pt-CoNC catalyst; single-atom catalyst,N-C; CATALYSTS,oxygen reduction reaction;proton exchange membrane fuel cells;Pt-CoNC catalyst;single-atom catalyst;N-C;CATALYSTS,yangbl@xpu.edu.cn; lingling.zhai@buct.edu.cn; xiangzh@mail.buct.edu.cn,,"111 RIVER ST, HOBOKEN 07030-5774, NJ USA",,,,WILEY,0001-1541,,,,English,AICHE J,Article,WoS,Engineering,WOS:001429232900001,2-s2.0-85218678608,China,xpu.edu.cn,Beijing Univ Chem Technol;Longyuan Beijing New Energy Engn Design & Res Inst;Xian Polytech Univ,"Beijing Univ Chem Technol, China;Longyuan Beijing New Energy Engn Design & Res Inst, China;Xian Polytech Univ, China","Bao, Chunzhu; Yang, Bolong; Zhai, Lingling; Xiang, Zhonghua"
"Leng, D., Tang, H., Yang, M., Zhang, J., Zhang, Y., Qin, J., Liu, Q., Lu, H., Yin, F.",Co/N-doped carbon nanotubes-grafted porous carbon sheets architecture as efficient electrocatalyst for oxygen reduction reaction,2021,Journal of Alloys and Compounds,871,,159566,,,,31,10.1016/j.jallcom.2021.159566,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85103085958&doi=10.1016%2Fj.jallcom.2021.159566&partnerID=40&md5=2e0992af6ff496ffd93ae6db20178aa8,"School of Physics and Information Technology, Shaanxi Normal University, Xi'an, Shaanxi, China; Key Laboratory of Applied Surface and Colloid Chemistry, Shaanxi Normal University, Xi'an, Shaanxi, China; Key Laboratory of Syngas Conversion of Shaanxi Province, Shaanxi Normal University, Xi'an, Shaanxi, China","Leng, Deying, School of Physics and Information Technology, Shaanxi Normal University, Xi'an, Shaanxi, China; Tang, Houbing, School of Physics and Information Technology, Shaanxi Normal University, Xi'an, Shaanxi, China; Yang, Mingming, Key Laboratory of Applied Surface and Colloid Chemistry, Shaanxi Normal University, Xi'an, Shaanxi, China; Zhang, Jinniu, School of Physics and Information Technology, Shaanxi Normal University, Xi'an, Shaanxi, China; Zhang, Yafeng, School of Physics and Information Technology, Shaanxi Normal University, Xi'an, Shaanxi, China; Qin, Juan, School of Physics and Information Technology, Shaanxi Normal University, Xi'an, Shaanxi, China; Liu, Qianru, School of Physics and Information Technology, Shaanxi Normal University, Xi'an, Shaanxi, China; Lu, Hongbing, School of Physics and Information Technology, Shaanxi Normal University, Xi'an, Shaanxi, China; Yin, Feng, School of Physics and Information Technology, Shaanxi Normal University, Xi'an, Shaanxi, China, Key Laboratory of Syngas Conversion of Shaanxi Province, Shaanxi Normal University, Xi'an, Shaanxi, China","The development of high performance and low-cost non-precious metal catalysts (NPMCs) for the oxygen reduction reaction (ORR) to replace platinum-based catalysts is significant in facilitating the commercialization of proton exchange membrance fuel cells (PEMFCs). In this work, a low-cost and effective approach is employed for producing Co/N-doped carbon nanotubes/porous carbon sheets (Co/N-CNT/PCS) catalysts by one-pot annealing of Co salt, melamine and polyvinylpyrrolidone (PVP). The prepared catalysts exhibit a N-doped carbon nanotubes-grafted porous carbon sheets structure, in which Co nanoparticles (Co NPs) encapsulated in bamboo-like CNTs. When compared with a commercial platinum carbon (Pt/C) catalyst in an alkaline solution, one such catalyst (Co/N-CNT/PCS800) displays comparable ORR electrocatalytic activity as well as improved long-team stability and methanol tolerance, arising from the combined effect of high specific surface area, large pore volume and the cooperation of pyridinic-N and graphitic-N. Moreover, given the scalability and economy of this synthesis, Co/N-CNT/PCS catalysts produced in this way are likely to emerge as a major contender as an ORR catalysts in PEMFCs. © 2021 Elsevier B.V.",Carbon nanotubes; Co/N-doped carbon; Oxygen reduction reaction; Porous carbon,Carbon nanotubes; Costs; Electrocatalysts; Electrolytic reduction; Grafting (chemical); Oxygen; Platinum; Porous materials; Proton exchange membrane fuel cells (PEMFC); Carbon sheets; Co/N-doped carbon; Doped carbons; Electrocatalyst for oxygen reduction reactions; High-low; N-doped; Oxygen reduction reaction; Porous carbons; Proton-exchange; ]+ catalyst; Doping (additives),Carbon nanotubes;Co/N-doped carbon;Oxygen reduction reaction;Porous carbon;Costs;Electrocatalysts;Electrolytic reduction;Grafting (chemical);Oxygen;Platinum;Porous materials;Proton exchange membrane fuel cells (PEMFC);Carbon sheets;Doped carbons;Electrocatalyst for oxygen reduction reactions;High-low;N-doped;Porous carbons;Proton-exchange;]+ catalyst;Doping (additives),"F. Yin; School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710119, China; email: Fengyin@snnu.edu.cn",,,,,,Elsevier Ltd,09258388,,JALCE,,English,J Alloys Compd,Article,Scopus,,2-s2.0-85103085958,,China,snnu.edu.cn,,,"Leng, D.; Tang, H.; Yang, M.; Zhang, J.; Zhang, Y.; Qin, J.; Liu, Q.; Lu, H.; Yin, F."
"Yang, H.J., Zhang, P.Y., Yi, X.Y., Yan, C., Pang, D.W., Chen, L.N., Wang, S.B., Wang, C.R., Liu, B.H., Zhang, G.N., Zhou, Z.Y., Li, X.F.",Constructing highly utilizable Fe-N4 single-atom sites by one-step gradient pyrolysis for electroreduction of O2 and CO2,2022,CHEMICAL ENGINEERING JOURNAL,440,,135749,,,8,37,10.1016/j.cej.2022.135749,,"[Yang, Huijuan; Yi, Xiaoyu; Yan, Cheng; Wang, ShengBao; Wang, Chunran; Liu, Bohua; Zhang, Gaini; Li, Xifei] Xian Univ Technol, Shaanxi Int Joint Res Ctr Surface Technol Energy, Sch Mat Sci & Engn, Inst Adv Electrochem Energy, Xian 710048, Peoples R China; [Zhang, Pengyang; Chen, Lina; Zhou, Zhiyou] Xiamen Univ, Coll Chem & Chem Engn, Innovat Ctr Chem Energy Mat, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China; [Pang, Dawei] Beijing Univ Technol, Inst Microstruct & Property Adv Mat, Beijing 100124, Peoples R China",,"Fe-N4 single-atom catalysts (SACs) have been investigated extensively in various energy conversion reaction. However, large amount of untouchable Fe-N4 sites buried in the dense carbon skeletons greatly restrict the maximization of catalytic performance. Therefore, rational construction of catalyst nanostructure to effectively expose Fe-N4 single atom sites is eagerly desired. Here, we report a one-step gradient pyrolysis method by using quaternary ammonia polysulfone (QAPS) polymer with a lower carbonization temperature to segregate precursor particles (ZIF-8 and polyaniline) to construct mesopores at 4-9 nm, thereby tellingly increasing the accessibility of Fe-N4 single atom sites. Nitrite reduction method revealed that the prepared catalyst had a three-fold increase in active sites density compared to catalyst without QAPS. Thus, it exhibits a terrific peak power density (1.15 W cm-2) in proton exchange membrane fuel cells and a superior CO partial current density (121 mA cm-2) with 99 % Faradaic efficiency for CO at 0.5 V in flow cells.",Fe -N 4 single atoms; the Fe -N 4 sites utilization; Proton exchange membrane fuel cells; CO 2 electroreduction,OXYGEN REDUCTION ACTIVITY; N-C ELECTROCATALYST; ACTIVE-SITES; CARBON; PERFORMANCE; TRANSPORT; CATALYST; COORDINATION; EXPOSURE; NITROGEN,Fe -N 4 single atoms;the Fe -N 4 sites utilization;Proton exchange membrane fuel cells;CO 2 electroreduction;OXYGEN REDUCTION ACTIVITY;N-C ELECTROCATALYST;ACTIVE-SITES;CARBON;PERFORMANCE;TRANSPORT;CATALYST;COORDINATION;EXPOSURE;NITROGEN,3zhouzy@xmu.edu.cn; i@xaut.edu.cn,,"PO BOX 564, 1001 LAUSANNE, SWITZERLAND",,,,ELSEVIER SCIENCE SA,1385-8947,,,,English,CHEM ENG J,Article,WoS,Engineering,WOS:000796355900006,2-s2.0-85126688582,China,xmu.edu.cn,Xian Univ Technol;Xiamen Univ;Beijing Univ Technol,"Xian Univ Technol, China;Xiamen Univ, China;Beijing Univ Technol, China","Yang, Huijuan; Zhang, Pengyang; Yi, Xiaoyu; Yan, Cheng; Pang, Dawei; Chen, Lina; Wang, ShengBao; Wang, Chunran; Liu, Bohua; Zhang, Gaini; Zhou, Zhiyou; Li, Xifei"
"Han, A., Sun, W., Wan, X., Cai, D., Wang, X., Li, F., Shui, J., Wang, D.",Construction of Co4 Atomic Clusters to Enable Fe−N4 Motifs with Highly Active and Durable Oxygen Reduction Performance,2023,Angewandte Chemie - International Edition,62,30,e202303185,,,,270,10.1002/anie.202303185,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85161702105&doi=10.1002%2Fanie.202303185&partnerID=40&md5=a709d21534c3dfbf747c3770e4061a74,"Institute of Metal Research Chinese Academy of Sciences, Shenyang, Liaoning, China; Department of Chemistry, Tsinghua University, Beijing, China; Department of Chemistry, Capital Normal University, Beijing, Beijing, China; Beihang University, Beijing, China; School of Chemical Engineering and Technology, Sun Yat-Sen University, Guangzhou, Guangdong, China; Robert R. McCormick School of Engineering and Applied Science, Evanston, IL, United States; Laboratory of Advanced Materials, Fudan University, Shanghai, China","Han, Ali, Institute of Metal Research Chinese Academy of Sciences, Shenyang, Liaoning, China, Department of Chemistry, Tsinghua University, Beijing, China; Sun, Wenming, Department of Chemistry, Capital Normal University, Beijing, Beijing, China; Wan, Xin, Beihang University, Beijing, China; Cai, Dandan, School of Chemical Engineering and Technology, Sun Yat-Sen University, Guangzhou, Guangdong, China; Wang, Xijun, Robert R. McCormick School of Engineering and Applied Science, Evanston, IL, United States; Li, Feng, Laboratory of Advanced Materials, Fudan University, Shanghai, China; Shui, Jianglan, Beihang University, Beijing, China; Wang, Dingsheng, Department of Chemistry, Tsinghua University, Beijing, China","Fe−N−C catalysts with single-atom Fe−N<inf>4</inf> configurations are highly needed owing to the high activity for oxygen reduction reaction (ORR). However, the limited intrinsic activity and dissatisfactory durability have significantly restrained the practical application of proton-exchange membrane fuel cells (PEMFCs). Here, we demonstrate that constructing adjacent metal atomic clusters (ACs) is effective in boosting the ORR performance and stability of Fe−N<inf>4</inf> catalysts. The integration of Fe−N<inf>4</inf> configurations with highly uniform Co<inf>4</inf> ACs on the N-doped carbon substrate (Co<inf>4</inf>@/Fe<inf>1</inf>@NC) is realized through a “pre-constrained” strategy using Co<inf>4</inf> molecular clusters and Fe(acac)<inf>3</inf> implanted carbon precursors. The as-developed Co<inf>4</inf>@/Fe<inf>1</inf>@NC catalyst exhibits excellent ORR activity with a half-wave potential (E<inf>1/2</inf>) of 0.835 V vs. RHE in acidic media and a high peak power density of 840 mW cm−2 in a H<inf>2</inf>−O<inf>2</inf> fuel cell test. First-principles calculations further clarify the ORR catalytic mechanism on the identified Fe−N<inf>4</inf> that modified with Co<inf>4</inf> ACs. This work provides a viable strategy for precisely establishing atomically dispersed polymetallic centers catalysts for efficient energy-related catalysis. © 2023 Wiley-VCH GmbH.",Atomic Clusters; Fuel Cell; Oxygen Reduction Reaction; Single-Atom Catalysts,Atoms; Carbon; Catalysis; Catalyst activity; Doping (additives); Electrolytic reduction; Iron compounds; Proton exchange membrane fuel cells (PEMFC); Atomic clusters; High activity; Intrinsic activities; Oxygen Reduction; Oxygen reduction reaction; Performance; Proton-exchange membranes fuel cells; Single-atom catalyst; Single-atoms; ]+ catalyst; Oxygen,Atomic Clusters;Fuel Cell;Oxygen Reduction Reaction;Single-Atom Catalysts;Atoms;Carbon;Catalysis;Catalyst activity;Doping (additives);Electrolytic reduction;Iron compounds;Proton exchange membrane fuel cells (PEMFC);High activity;Intrinsic activities;Oxygen Reduction;Performance;Proton-exchange membranes fuel cells;Single-atom catalyst;Single-atoms;]+ catalyst;Oxygen,"D. Wang; Department of Chemistry, Tsinghua University, Beijing, 100084, China; email: wangdingsheng@mail.tsinghua.edu.cn",,,,,,John Wiley and Sons Inc,14337851,,ACIEF,37222657,English,Angew. Chem. Int. Ed.,Article,Scopus,,2-s2.0-85161702105,,China;United States,mail.tsinghua.edu.cn,,,"Han, A.; Sun, W.; Wan, X.; Cai, D.; Wang, X.; Li, F.; Shui, J.; Wang, D."
"Liu, Y., Li, Q., Liang, Y., Liang, J., Sui, X., Wang, Z.",Controlled preparation of Fe-N-C catalyst with ordered macroporous framework for superior acidic oxygen reduction performance,2025,Journal of Alloys and Compounds,1036,,182115,,,,1,10.1016/j.jallcom.2025.182115,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105010147835&doi=10.1016%2Fj.jallcom.2025.182115&partnerID=40&md5=01798f81c401817d75f5b118535f33be,"College of Materials Science and Engineering, Shenzhen University, Shenzhen, Guangdong, China; MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China","Liu, Yuzhe, College of Materials Science and Engineering, Shenzhen University, Shenzhen, Guangdong, China; Li, Qi, College of Materials Science and Engineering, Shenzhen University, Shenzhen, Guangdong, China; Liang, Yuhan, College of Materials Science and Engineering, Shenzhen University, Shenzhen, Guangdong, China; Liang, Junhao, College of Materials Science and Engineering, Shenzhen University, Shenzhen, Guangdong, China; Sui, Xulei, College of Materials Science and Engineering, Shenzhen University, Shenzhen, Guangdong, China; Wang, Zhenbo, College of Materials Science and Engineering, Shenzhen University, Shenzhen, Guangdong, China, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China","The non-precious metal Fe-N-C catalyst is regarded as a potential substitute for the precious metal catalysts for the oxygen reduction reaction (ORR) application. However, its catalytic activity and stability still fall short of those of the precious metal catalysts. Here, Fe-N-C catalyst with an ordered macroporous framework was achieved through using polystyrene (PS) as templates. The results indicate the particle size and structural orderliness of PS templates have great influence on the morphology and the catalytic performance of the obtained Fe-N-C catalysts. The optimized catalyst, derived from ordered PS with 200 nm, exhibits exceptional ORR activity in acidic media with a half-wave potential of 0.885 V (vs. RHE), surpassing commercial Pt/C (0.847 V) and Fe-N-C without PS counterparts (0.796 V), and superior mass activity (26.54 A g⁻¹, 0.8 V) and kinetic current density (14.7 mA cm⁻²,0.85 V), while maintaining outstanding durability under 30,000 potential cycles (18 mV loss). The catalyst, as the cathode in an H₂/O₂ fuel cell, exhibits a peak power density of 0.83 W cm⁻². This excellent activity arises from its regular morphology combined with ordered macroporous framework facilitating active site exposure and reactant diffusion. The regularly arranged template-induced structural ordering enhances the graphitization and integrity of carbon matrix during pyrolysis, promoting the stability. These findings establish a template-size-dependent design principle for non-precious metal catalysts, offering a viable pathway to balance activity-stability trade-offs in proton-exchange membrane fuel cells and related electrochemical energy technologies. © 2025 Elsevier B.V.",Fe-N-C catalyst; Ordered macropores; Oxygen reduction; PEMFC; Polystyrene templates,Catalyst activity; Electrolytic reduction; Iron compounds; Morphology; Oxygen; Oxygen reduction reaction; Particle size; Platinum; Platinum compounds; Fe-N-C catalyst; Macropores; Macroporous frameworks; Ordered macropore; Ordered macroporous; Oxygen Reduction; P.E.M.F.C; Polystyrene template; Precious-metal catalysts; ]+ catalyst; Economic and social effects; Proton exchange membrane fuel cells (PEMFC),Fe-N-C catalyst;Ordered macropores;Oxygen reduction;PEMFC;Polystyrene templates;Catalyst activity;Electrolytic reduction;Iron compounds;Morphology;Oxygen;Oxygen reduction reaction;Particle size;Platinum;Platinum compounds;Macropores;Macroporous frameworks;Ordered macropore;Ordered macroporous;P.E.M.F.C;Polystyrene template;Precious-metal catalysts;]+ catalyst;Economic and social effects;Proton exchange membrane fuel cells (PEMFC),"X. Sui; College of Materials Science and Engineering, Shenzhen Key Laboratory of Special Functional Materials, Shenzhen Engineering Laboratory for Advance Technology of Ceramics, Guangdong Research Center for Interfacial Engineering of Functional Materials, Guangdong Provincial Key Laboratory of New Energy Materials Service Safety, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China; email: suixulei@szu.edu.cn; Z. Wang; College of Materials Science and Engineering, Shenzhen Key Laboratory of Special Functional Materials, Shenzhen Engineering Laboratory for Advance Technology of Ceramics, Guangdong Research Center for Interfacial Engineering of Functional Materials, Guangdong Provincial Key Laboratory of New Energy Materials Service Safety, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China; email: wangzhenbo@szu.edu.cn",,,,,,Elsevier Ltd,09258388,,JALCE,,English,J Alloys Compd,Article,Scopus,,2-s2.0-105010147835,,China,szu.edu.cn,,,"Liu, Y.; Li, Q.; Liang, Y.; Liang, J.; Sui, X.; Wang, Z."
"Zhao, Y., Yin, P.F., Yang, Y.Y., Wang, R.G., Gong, C.R., Li, J.S., Guo, J.X., Wang, Q.L., Ling, T.",Converting Fe-N-C Single-atom Catalyst to a New FeNxSey Cluster Catalyst for Proton-exchange Membrane Fuel Cells,2025,ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,64,9,e202419501,,,9,18,10.1002/anie.202419501,,"[Zhao, Yang; Yin, Pengfei; Wang, Ruguang; Gong, Cairong; Li, Jisi; Guo, Jiaxin; Wang, Quanlu; Ling, Tao] Tianjin Univ, Key Lab Adv Ceram & Machining Technol, Sch Mat Sci & Engn, Minist Educ,Tianjin Key Lab Composite & Funct Mat, Tianjin 300072, Peoples R China; [Yang, Yuanyuan] Ningxia Univ, Coll Chem & Chem Engn, Yinchuan 750021, Ningxia, Peoples R China",,"Iron-nitrogen-carbon (Fe-N-C) single-atom catalyst is the most promising alternative to platinum catalyst for proton-exchange membrane fuel cells (PEMFCs), however its high performance cannot be maintained for a long enough time in device operation. The construction of a new Fe coordination environment that is completely different from the square-planar Fe N4 configuration in classic Fe-N-C catalyst is expected to break the current stability limits of Pt-free catalysts, which however remains unexplored. Here, we report, for the first time, the conversion of Fe-N-C catalyst to a new FeNxSey cluster catalyst, where the active Fe sites are three-dimensionally (3D) co-coordinated by N and Se atoms. Due to this unique Fe coordination configuration, the FeNxSey catalyst exhibits much better 4e(-) ORR activity and selectivity than the state-of-the-art Fe-N-C catalyst. Specifically, the yields of hydrogen peroxide (H2O2) and center dot OH radicals on the FeNxSey catalyst are only one-quarter and one-third of that on the Fe-N-C counterpart, respectively. Therefore, the FeNxSey catalyst exhibits outstanding cyclic stability, losing only 10 mV in half-wave potential E1/2 after 10,000 potential cycles, much smaller than that of the Fe-N-C catalyst (56 mV), representing the most stable Pt-free catalysts ever reported for PEMFCs. More significantly, the 3D co-coordination structure effectively inhibits the Fe demetallization of the FeNxSey catalyst in the presence of H2O2. As a result, the FeNxSey based PEMFC shows excellent durability, with the current density attenuation significantly lower than that of the Fe-N-C based device after accelerated durability testing. Our work provides guidance for the development of next-generation Pt-free catalysts for PEMFCs.",acidic oxygen reduction reaction; proton-exchange membrane fuel cells; platinum-free catalysts; coordination configuration; metal demetallizaiton,OXYGEN REDUCTION; ACTIVE-SITES; IDENTIFICATION; DURABILITY; IMPROVE; IRON,acidic oxygen reduction reaction;proton-exchange membrane fuel cells;platinum-free catalysts;coordination configuration;metal demetallizaiton;OXYGEN REDUCTION;ACTIVE-SITES;IDENTIFICATION;DURABILITY;IMPROVE;IRON,lingt04@tju.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,,,,39835461,English,ANGEW CHEM INT EDIT,Article,WoS,Chemistry,WOS:001413874800001,2-s2.0-85217408188,China,tju.edu.cn,Tianjin Univ;Ningxia Univ,"Tianjin Univ, China;Ningxia Univ, China","Zhao, Yang; Yin, Pengfei; Yang, Yuanyuan; Wang, Ruguang; Gong, Cairong; Li, Jisi; Guo, Jiaxin; Wang, Quanlu; Ling, Tao"
"Xia, F., Li, B., An, B., Zachman, M.J., Xie, X., Liu, Y., Xu, S., Saha, S., Wu, Q., Gao, S., Abdul Razak, I.B., Brown, D.E., Ramani, V., Wang, R., Marks, T.J., Shao, Y., Cheng, Y.",Cooperative Atomically Dispersed Fe-N4 and Sn-Nx Moieties for Durable and More Active Oxygen Electroreduction in Fuel Cells,2024,Journal of the American Chemical Society,146,49,,33569,33578,,17,10.1021/jacs.4c11121,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85210997010&doi=10.1021%2Fjacs.4c11121&partnerID=40&md5=861340cd0e6c99f693fdf700bba62849,"The University of Tennessee, Knoxville, Knoxville, TN, United States; Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, IL, United States; Oak Ridge National Laboratory, Oak Ridge, TN, United States; Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA, United States; Department of Chemistry, Northwestern University, Evanston, IL, United States; Jinetics Inc., Santa Clara, CA, United States; Department of Energetics, McKelvey School of Engineering, St. Louis, MO, United States; Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, United States; Department of Physics, Northern Illinois University, DeKalb, IL, United States; Applied Materials Division, Argonne National Laboratory, Lemont, IL, United States","Xia, Fan, The University of Tennessee, Knoxville, Knoxville, TN, United States, Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, IL, United States; Li, Bomin, The University of Tennessee, Knoxville, Knoxville, TN, United States; An, Bowen, The University of Tennessee, Knoxville, Knoxville, TN, United States; Zachman, Michael J., Oak Ridge National Laboratory, Oak Ridge, TN, United States; Xie, Xiaohong, Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA, United States; Liu, Yiqi, Department of Chemistry, Northwestern University, Evanston, IL, United States; Xu, Shicheng, Jinetics Inc., Santa Clara, CA, United States; Saha, Sulay, Department of Energetics, McKelvey School of Engineering, St. Louis, MO, United States; Wu, Qin, Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, United States; Gao, Siyuan, Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, IL, United States; Abdul Razak, Iddrisu Bachokun, Department of Physics, Northern Illinois University, DeKalb, IL, United States; Brown, Dennis E., Department of Physics, Northern Illinois University, DeKalb, IL, United States; Ramani, Vijay K., Department of Energetics, McKelvey School of Engineering, St. Louis, MO, United States; Wang, Rongyue, Applied Materials Division, Argonne National Laboratory, Lemont, IL, United States; Marks, Tobin J., Department of Chemistry, Northwestern University, Evanston, IL, United States; Shao, Yuyan, Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA, United States; Cheng, Yingwen, The University of Tennessee, Knoxville, Knoxville, TN, United States, Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, IL, United States","One grand challenge for deploying porous carbons with embedded metal-nitrogen-carbon (M-N-C) moieties as platinum group metal (PGM)-free electrocatalysts in proton-exchange membrane fuel cells is their fast degradation and inferior activity. Here, we report the modulation of the local environment at Fe-N<inf>4</inf> sites via the application of atomic Sn-N<inf>x</inf> sites for simultaneously improved durability and activity. We discovered that Sn-N<inf>x</inf> sites not only promote the formation of the more stable D2 FeN<inf>4</inf>C<inf>10</inf> sites but also invoke a unique D3 SnN<inf>x</inf>-FeIIN<inf>4</inf> site that is characterized by having atomically dispersed bridged Sn-N<inf>x</inf> and Fe-N<inf>4</inf>. This new D3 site exhibits significantly improved stability against demetalation and several times higher turnover frequency for the oxygen reduction reaction (ORR) due to the shift of the reaction pathway from a single-site associative mechanism to a dual-site dissociative mechanism with the adjacent Sn site facilitating a lower overpotential cleavage of the O-O bond. This mechanism bypasses the formation of the otherwise inevitable intermediate that is responsible for demetalation, where two hydroxyl intermediates bind to one Fe site. As a result, a mesoporous Fe/Sn-PNC catalyst exhibits a positively shifted ORR half-wave potential and more than 50% lower peroxide formation. This, in combination with the stable D3 site and enriched D2 Fe sites, significantly enhanced the catalyst’s durability as demonstrated in membrane electrode assemblies using complementary accelerated durability testing protocols. © 2024 American Chemical Society.",,Bioremediation; Electrolysis; Oxygen reduction reaction; Photodissociation; Tin alloys; Active oxygen; Demetalation; Embedded metals; Fe sites; Grand Challenge; Nitrogen-carbon; Oxygen electro reductions; Porous carbons; ]+ catalyst; Electrolytic reduction; carbon; inorganic compound; iron nitride; metal; nitrogen; platinum; tin nitride; unclassified drug; hydroxyl group; oxygen; peroxide; phosphoglucomutase; proton; adsorption; Article; bioengineering; catalyst; chemical reaction; cytotoxicity; density functional theory; drug synthesis; electrochemical analysis; elemental analysis; energy dispersive X ray spectroscopy; mass spectrometry; nonhuman; oxidation; oxygen electroreduction; scanning electron microscopy; spectroscopy; temperature; transmission electron microscopy; X ray absorption spectroscopy; X ray diffraction; article; controlled study; degradation; electrode; fuel; pharmaceutics; reaction analysis,Bioremediation;Electrolysis;Oxygen reduction reaction;Photodissociation;Tin alloys;Active oxygen;Demetalation;Embedded metals;Fe sites;Grand Challenge;Nitrogen-carbon;Oxygen electro reductions;Porous carbons;]+ catalyst;Electrolytic reduction;carbon;inorganic compound;iron nitride;metal;nitrogen;platinum;tin nitride;unclassified drug;hydroxyl group;oxygen;peroxide;phosphoglucomutase;proton;adsorption;Article;bioengineering;catalyst;chemical reaction;cytotoxicity;density functional theory;drug synthesis;electrochemical analysis;elemental analysis;energy dispersive X ray spectroscopy;mass spectrometry;nonhuman;oxidation;oxygen electroreduction;scanning electron microscopy;spectroscopy;temperature;transmission electron microscopy;X ray absorption spectroscopy;X ray diffraction;controlled study;degradation;electrode;fuel;pharmaceutics;reaction analysis,"Q. Wu; Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, 11973, United States; email: qinwu@bnl.gov; Y. Shao; Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, 99354, United States; email: yuyan.shao@pnnl.gov; Y. Cheng; Department of Chemistry, University of Tennessee, Knoxville, 37996, United States; email: ycheng@utk.edu",,,,,,American Chemical Society,00027863,,JACSA,39620942,English,J. Am. Chem. Soc.,Article,Scopus,,2-s2.0-85210997010,,United States,bnl.gov,,,"Xia, F.; Li, B.; An, B.; Zachman, M.J.; Xie, X.; Liu, Y.; Xu, S.; Saha, S.; Wu, Q.; Gao, S.; Abdul Razak, I.B.; Brown, D.E.; Ramani, V.; Wang, R.; Marks, T.J.; Shao, Y.; Cheng, Y."
"Zhang, Y., Wen, Z., Li, J., Yang, C.C., Jiang, Q.",Coordination environment engineering of single-atom catalysts for the oxygen reduction reaction,2023,Materials Chemistry Frontiers,7,17,,3595,3624,,16,10.1039/d3qm00146f,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85160438756&doi=10.1039%2Fd3qm00146f&partnerID=40&md5=9686e5009e8f2704fbd995e60afb7abd,"School of Materials Science and Engineering, Jilin University, Changchun, Jilin, China","Zhang, Ying, School of Materials Science and Engineering, Jilin University, Changchun, Jilin, China; Wen, Zi, School of Materials Science and Engineering, Jilin University, Changchun, Jilin, China; Li, Jian, School of Materials Science and Engineering, Jilin University, Changchun, Jilin, China; Yang, Chuncheng, School of Materials Science and Engineering, Jilin University, Changchun, Jilin, China; Jiang, Qing, School of Materials Science and Engineering, Jilin University, Changchun, Jilin, China","Benefiting from high efficiency and environmental friendliness, Zn-air batteries, fuel cells and electrochemical H<inf>2</inf>O<inf>2</inf> production have attracted significant attention in the energy field. However, the oxygen reduction reaction (ORR), which takes place at the cathode and involves a multi-electron transfer process, has become a barrier to the widespread applications of these pollution-free systems. It is urgent to develop efficient catalysts for the ORR. Single-atom catalysts (SACs), particularly M-N-C SACs (M = non-precious metal atom), have emerged as attractive candidates with maximum metal atom utilization, uniform active centers, strong metal-support interaction and well-defined active sites. In this review, recent developments in improving the intrinsic activity of M-N-C SACs were summarized, emphasizing the impact of the surrounding environment on the ORR performance of single-atom sites as determined by experimental investigations and density functional theory (DFT) simulations. In addition, advanced characterization techniques, synthesis strategies and the applications of M-N-C SACs in Zn-air batteries, proton exchange membrane fuel cells (PEMFCs) and H<inf>2</inf>O<inf>2</inf> production were also documented. This review may stimulate the intensive exploration of highly active M-N-C SACs for practical applications in the near future. © 2023 The Royal Society of Chemistry",,Atoms; Catalyst activity; Coordination reactions; Density functional theory; Electrolytic reduction; Oxygen; Proton exchange membrane fuel cells (PEMFC); Coordination environment; Electrochemicals; Energy fields; Environment engineering; Environmental friendliness; Higher efficiency; Metal atoms; Oxygen reduction reaction; Single-atoms; ]+ catalyst; Electron transport properties,Atoms;Catalyst activity;Coordination reactions;Density functional theory;Electrolytic reduction;Oxygen;Proton exchange membrane fuel cells (PEMFC);Coordination environment;Electrochemicals;Energy fields;Environment engineering;Environmental friendliness;Higher efficiency;Metal atoms;Oxygen reduction reaction;Single-atoms;]+ catalyst;Electron transport properties,"C.C. Yang; Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, and School of Materials Science and Engineering, Jilin University, Changchun, 130022, China; email: ccyang@jlu.edu.cn; Q. Jiang; Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, and School of Materials Science and Engineering, Jilin University, Changchun, 130022, China; email: jiangq@jlu.edu.cn",,,,,,Royal Society of Chemistry,,,,,English,Mater. Chem. Front.,Review,Scopus,,2-s2.0-85160438756,,China,jlu.edu.cn,,,"Zhang, Y.; Wen, Z.; Li, J.; Yang, C.C.; Jiang, Q."
"Meng, X., Zhang, X., Rageloa, J., Liu, Z., Wang, W.",Coordination strategy to prepare high-performance Fe-Nx catalysts for Al-air batteries,2023,Journal of Power Sources,567,,232988,,,,21,10.1016/j.jpowsour.2023.232988,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85150462330&doi=10.1016%2Fj.jpowsour.2023.232988&partnerID=40&md5=e5cfd488e4d99b421dfc9d80397e1fba,"Tianjin University, Tianjin, China; Forschungszentrum Jülich GmbH, Julich, Germany","Meng, Xu, Tianjin University, Tianjin, China; Zhang, Xuemeng, Tianjin University, Tianjin, China; Rageloa, Justin, Tianjin University, Tianjin, China; Liu, Zigeng, Forschungszentrum Jülich GmbH, Julich, Germany; Wang, Wei, Tianjin University, Tianjin, China","Oxygen reduction reaction (ORR) is the core reaction of energy conversion devices, such as proton exchange membrane fuel cells and Al-air batteries. Thus, there is an urgent demand for efficient and stable electrocatalysts to accelerate the ORR process. In this study, we present a novel method for preparing Fe-Nx catalysts through the use of electrospinning technology. The catalyst has a one-dimensional fiber structure. Succinonitrile (SN) is used as a complexing agent to stable Fe ions and prevent them from agglomerating during carbonization, thereby forming high-density Fe-Nx sites. The Fe<inf>3</inf>C nanoparticles produced during pyrolysis can improve the catalytic activity of the Fe-Nx site. The performance of the catalyst was evaluated using a rotating disk electrode (RDE) test in a 0.1 M KOH solution, exhibiting a half-wave potential of 0.925 V vs RHE, which surpasses that of the commercial Pt/C electrode (0.86 V). The assembled aluminum-air battery has an open potential of 2.01 V and a maximum power of 98 mW/cm2. This work provides an innovative method for the direct preparation of Fe–N–C catalysts via electrospinning. © 2023 Elsevier B.V.",Al-air batteries; Electrospinning; Fe–N–C; Oxygen reduction reaction; PAN,Aluminum compounds; Carbonization; Catalyst activity; Coordination reactions; Electrocatalysts; Electrodes; Electrolytic reduction; Iron compounds; Oxygen; Oxygen reduction reaction; Potassium hydroxide; Proton exchange membrane fuel cells (PEMFC); Rotating disks; Al-air battery; Coordination strategy; Energy conversion devices; Fe–N–C; PAN; Performance; Proton-exchange membranes fuel cells; Reaction process; ]+ catalyst; Electrospinning,Al-air batteries;Electrospinning;Fe–N–C;Oxygen reduction reaction;PAN;Aluminum compounds;Carbonization;Catalyst activity;Coordination reactions;Electrocatalysts;Electrodes;Electrolytic reduction;Iron compounds;Oxygen;Potassium hydroxide;Proton exchange membrane fuel cells (PEMFC);Rotating disks;Al-air battery;Coordination strategy;Energy conversion devices;Performance;Proton-exchange membranes fuel cells;Reaction process;]+ catalyst,"W. Wang; School of Chemical Engineering and Technology, Tianjin University, Tianjin, China; email: wangweipaper@tju.edu.cn",,,,,,Elsevier B.V.,03787753,0444894810,JPSOD,,English,J Power Sources,Article,Scopus,,2-s2.0-85150462330,,China;Germany,tju.edu.cn,,,"Meng, X.; Zhang, X.; Rageloa, J.; Liu, Z.; Wang, W."
"Zhu, J.H., Fang, Z.Y., Yang, X.X., Chen, M.J., Chen, Z.Y., Qiu, F., Wang, M.J., Liu, P., Xu, Q., Zhuang, X.D., Wu, G.",Core-Shell Structured Fe-N-C Catalysts with Enriched Iron Sites inSurface Layers for Proton-Exchange Membrane Fuel Cells,2022,ACS CATALYSIS,12,11,,6409,6417,9,48,10.1021/acscatal.2c01358,,"[Zhu, Jinhui; Fang, Ziyu; Chen, Zhenying; Qiu, Feng; Zhuang, Xiaodong] Shanghai Jiao Tong Univ, Frontiers Sci Ctr Transformat Mol, State Key Lab Met Matrix Composites,Sch Chem & Ch, Mesoentropy Matter Lab,Shanghai Key Lab Elect Ins, Shanghai 200240, Peoples R China; [Zhu, Jinhui; Yang, Xiaoxuan; Chen, Mengjie; Wu, Gang] SUNY Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA; [Wang, Mengjia; Liu, Pan] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China; [Xu, Qing] Chinese Acad Sci, Shanghai Adv Res Inst, CAS Key Lab Low Carbon Convers Sci & Engn, Shanghai 201210, Peoples R China",,"Carbon-supported andnitrogen-coordinatedsingleironsitematerials (denoted as Fe-N-C) are the most promising platinum group metal(PGM)-free cathode catalysts for the oxygen reduction reaction (ORR) becauseof their encouraging activity and continuously improved stability. However,current Fe-N-C catalysts derived from zeolitic imidazolate framework-8 (ZIF-8)nanocrystal precursors via thermal activation at high temperatures often sufferfrom low accessible Fe sites because the most active sites are buried within bulkcarbon nanoparticles. The morphology limitation significantly mitigates thecritical three-phase interfaces for creating effective active sites, which requiressufficient ionomer coverage for conducting protons therefore inhibiting the masstransfer of reactants (i.e., O2) within electrodes in proton-exchange membranefuel cells. Herein, we report an effective strategy for designing a core-shellcomposite precursor consisting of a polyhedron N-doped porous carbon corefrom ZIF-8 and a shell from an Fe(III) tetraphenylporphyrin chloride-basedconjugated microporous polymer. The resulting core-shell structured Fe-N-C catalyst contains most of the atomic Fe sites at theshell layer with increased density. The unique catalyst design can shorten the diffusion distance of H+and O2and facilitate H2Oproduct removal, promoting the promoted ORR in thick PGM-free cathodes. Hence, the membrane electrode assembly with optimalFe-N-C catalysts achieved encouraging current densities of 32 mA cm-2at 0.9 ViR???free(1.0 bar O2) and 102 mA cm-2at 0.8 V (1.0bar air) and a peak power density of 0.43 W cm-2(1.0 bar air). This work provides an approach to constructing critical M-N-Ccatalysts with easily accessible single metal active sites in surface layers for the ORR and other critical electrocatalytic reactions.",proton-exchange membrane fuel cells; enhanced mass transport; oxygen reduction reaction; Fe-N-C catalysts; single Fe sites,NITROGEN-CARBON CATALYSTS; OXYGEN REDUCTION; ACTIVE-SITES; CATHODE CATALYSTS; ELECTROCATALYSTS; PERFORMANCE; IDENTIFICATION; FRAMEWORK,proton-exchange membrane fuel cells;enhanced mass transport;oxygen reduction reaction;Fe-N-C catalysts;single Fe sites;NITROGEN-CARBON CATALYSTS;OXYGEN REDUCTION;ACTIVE-SITES;CATHODE CATALYSTS;ELECTROCATALYSTS;PERFORMANCE;IDENTIFICATION;FRAMEWORK,zhuang@sjtu.edu.cn; gangwu@buffalo.edu,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2155-5435,,,,English,ACS CATAL,Article,WoS,Chemistry,WOS:000810516000013,2-s2.0-85131161832,China;United States,sjtu.edu.cn,Shanghai Jiao Tong Univ;SUNY Buffalo;Chinese Acad Sci,"Shanghai Jiao Tong Univ, China;SUNY Buffalo, United States;Chinese Acad Sci, China","Zhu, Jinhui; Fang, Ziyu; Yang, Xiaoxuan; Chen, Mengjie; Chen, Zhenying; Qiu, Feng; Wang, Mengjia; Liu, Pan; Xu, Qing; Zhuang, Xiaodong; Wu, Gang"
"Zhang, W., Pan, J.K., Yu, Y.F., Zhang, X.J., Wang, J.H., Chen, W.X., Zhuang, G.L.",Correlation of the spin state and catalytic property of M-N4 single-atom catalysts in oxygen reduction reactions,2023,Physical Chemistry Chemical Physics,25,16,,11673,11683,,16,10.1039/d3cp00010a,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85153536362&doi=10.1039%2Fd3cp00010a&partnerID=40&md5=12944dce9002bab4167028ed88db44a6,"Institute of Industrial Catalysis, Zhejiang University of Technology, Hangzhou, Zhejiang, China; Ltd., Xiamen, Fujian, China","Zhang, Wei, Institute of Industrial Catalysis, Zhejiang University of Technology, Hangzhou, Zhejiang, China; Pan, Jinkong, Institute of Industrial Catalysis, Zhejiang University of Technology, Hangzhou, Zhejiang, China, Ltd., Xiamen, Fujian, China; Yu, Yifan, Institute of Industrial Catalysis, Zhejiang University of Technology, Hangzhou, Zhejiang, China; Zhang, Xianjie, Institute of Industrial Catalysis, Zhejiang University of Technology, Hangzhou, Zhejiang, China; Wang, Jiahao, Institute of Industrial Catalysis, Zhejiang University of Technology, Hangzhou, Zhejiang, China; Chen, Wenxian, Institute of Industrial Catalysis, Zhejiang University of Technology, Hangzhou, Zhejiang, China; Zhuang, Guilin, Institute of Industrial Catalysis, Zhejiang University of Technology, Hangzhou, Zhejiang, China","The rational design of high-performance catalysts for oxygen reduction reactions (ORRs) is of great importance for large-scale applications in the field of proton-exchange membrane fuel cells and the green synthesis of H<inf>2</inf>O<inf>2</inf>. The effect of spin states of paramagnetic metal ions on the selectivity of ORRs is significant for single-atom catalysts (SACs). In this work, via spin-polarization density functional theory (DFT) calculations, we systematically investigated the popular paramagnetic metal-nitrogen graphene (M-N<inf>4</inf>-C, M = Mn, Fe, and Co) SACs to mainly focus on the correlation of spin states and catalytic performance (e.g. activity and selectivity). Both thermodynamically and kinetically, it was found that Co-N<inf>4</inf>-C (S = 1/2) has excellent 2e− oxygen reduction performance (hydrogen peroxide production) with an ultralow overpotential of 0.03 V, and the hydrogenation of OOH* is the rate-determining step (RDS) with an energy barrier of 1.20 eV. The 4e− ORR tends to occur along the OOH dissociation pathway (O* + OH*) on Co-N<inf>4</inf>-C (S = 3/2), in which OOH* decomposition is the RDS with an energy barrier of 1.01 eV. It is proved that the spin magnetic moment is the key factor to regulate the ORR property via multi-angle electronic analysis. The spin states of catalysts play a crucial role in the activity and selectivity of ORRs mainly by manipulating the bond strength between OOH and catalysts. This will provide new insights for the rational design of ORR catalysts with magnetic metals. © 2023 The Royal Society of Chemistry.",,Catalyst selectivity; Density functional theory; Design for testability; Electrolytic reduction; Energy barriers; Magnetic moments; Metal ions; Paramagnetism; Proton exchange membrane fuel cells (PEMFC); Spin dynamics; Catalytic properties; Large-scale applications; Oxygen reduction reaction; Performance; Proton-exchange membranes fuel cells; Rate determining step; Rational design; Single-atoms; Spin state; ]+ catalyst; Spin polarization,Catalyst selectivity;Density functional theory;Design for testability;Electrolytic reduction;Energy barriers;Magnetic moments;Metal ions;Paramagnetism;Proton exchange membrane fuel cells (PEMFC);Spin dynamics;Catalytic properties;Large-scale applications;Oxygen reduction reaction;Performance;Proton-exchange membranes fuel cells;Rate determining step;Rational design;Single-atoms;Spin state;]+ catalyst;Spin polarization,"G.-L. Zhuang; Institute of Industrial Catalysis, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, China; email: glzhuang@zjut.edu.cn",,,,,,Royal Society of Chemistry,14639076,,PPCPF,37051874,English,Phys. Chem. Chem. Phys.,Article,Scopus,,2-s2.0-85153536362,,China,zjut.edu.cn,,,"Zhang, W.; Pan, J.-K.; Yu, Y.-F.; Zhang, X.-J.; Wang, J.-H.; Chen, W.-X.; Zhuang, G.-L."
"Kramm, U.I., Lefevre, M., Larouche, N., Schmeisser, D., Dodelet, J.P.",Correlations between mass activity and physicochemical properties of Fe/N/C catalysts for the ORR in PEM fuel cell via 57Fe Mössbauer spectroscopy and other techniques,2014,Journal of the American Chemical Society,136,3,,978,985,,495,10.1021/ja410076f,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84892989579&doi=10.1021%2Fja410076f&partnerID=40&md5=7addbe8a1806761d6f1aa6301231031b,"Department of Applied Physics and Sensors, Brandenburg University of Technology Cottbus-Senftenberg, Cottbus, Brandenburg, Germany; Institut National de la Recherche Scientifique, Quebec, QC, Canada; Canetique Electrocatalysis Inc., Varennes, QC, Canada","Kramm, Ulrike Ingrid, Department of Applied Physics and Sensors, Brandenburg University of Technology Cottbus-Senftenberg, Cottbus, Brandenburg, Germany, Institut National de la Recherche Scientifique, Quebec, QC, Canada; Lefèvre, Michel, Canetique Electrocatalysis Inc., Varennes, QC, Canada; Larouche, Nicholas, Institut National de la Recherche Scientifique, Quebec, QC, Canada; Schmeißer, Dieter, Department of Applied Physics and Sensors, Brandenburg University of Technology Cottbus-Senftenberg, Cottbus, Brandenburg, Germany; Dodelet, Jean Pol, Institut National de la Recherche Scientifique, Quebec, QC, Canada","The aim of this work is to clarify the origin of the enhanced PEM-FC performance of catalysts prepared by the procedures described in Science 2009, 324, 71 and Nat. Commun. 2011, 2, 416. Catalysts were characterized after a first heat treatment in argon at 1050 °C (Ar) and a second heat treatment in ammonia at 950 °C (Ar + NH<inf>3</inf>). For the NC catalysts a variation of the nitrogen precursor was also implemented. 57Fe Mössbauer spectroscopy, X-ray photoelectron spectroscopy, neutron activation analysis, and N<inf>2</inf> sorption measurements were used to characterize all catalysts. The results were correlated to the mass activity of these catalysts measured at 0.8 V in H<inf>2</inf>/O<inf>2</inf> PEM-FC. It was found that all catalysts contain the same FeN<inf>4</inf>-like species already found in INRS Standard (Phys. Chem. Chem. Phys. 2012, 14, 11673). Among all FeN<inf>4</inf>-like species, only D1 sites, assigned to FeN<inf>4</inf>/C, and D3, assigned to N-FeN<inf>2+2</inf>/C sites, were active for the oxygen reduction reaction (ORR). The difference between INRS Standard and the new catalysts is simply that there are many more D1 and D3 sites available in the new catalysts. All (Ar + NH<inf>3</inf>)-type catalysts have a much larger porosity than Ar-type catalysts, while the maximum number of their active sites is only slightly larger after a second heat treatment in NH<inf>3</inf>. The large difference in activity between the Ar-type catalysts and the Ar + NH<inf>3</inf> ones stems from the availability of the sites to perform ORR, as many sites of the Ar-type catalysts are secluded in the material, while they are available at the surface of the Ar + NH<inf>3</inf>-type catalysts. © 2013 American Chemical Society.",,Active site; Mass activity; Oxygen reduction reaction; PEM fuel cell; Physicochemical property; Sorption measurements; Ssbauer spectroscopies; Electrolytic reduction; Heat treatment; Photoelectrons; Proton exchange membrane fuel cells (PEMFC); Wetlands; X ray photoelectron spectroscopy; Catalyst activity; ammonia; argon; carbon; iron; iron 57; nitrogen; phenanthroline; phthalocyanine; porphyrin; absorption; adsorption; article; catalysis; catalyst; electrical equipment; electron; heat treatment; magnetism; Mossbauer spectroscopy; neutron activation analysis; physical chemistry; polarization; porosity; proton exchange membrane fuel cell; pyrolysis; transmission electron microscopy,Active site;Mass activity;Oxygen reduction reaction;PEM fuel cell;Physicochemical property;Sorption measurements;Ssbauer spectroscopies;Electrolytic reduction;Heat treatment;Photoelectrons;Proton exchange membrane fuel cells (PEMFC);Wetlands;X ray photoelectron spectroscopy;Catalyst activity;ammonia;argon;carbon;iron;iron 57;nitrogen;phenanthroline;phthalocyanine;porphyrin;absorption;adsorption;article;catalysis;catalyst;electrical equipment;electron;magnetism;Mossbauer spectroscopy;neutron activation analysis;physical chemistry;polarization;porosity;proton exchange membrane fuel cell;pyrolysis;transmission electron microscopy,"U.I. Kramm; Department of Applied Physics and Sensors, Brandenburgische Technische Universität Cottbus Senftenberg, 03046 Cottbus, Konrad-Wachsmann-Allee 17, Germany; email: kramm@tu-cottbus.de",,,,,,,00027863,,JACSA,,English,J. Am. Chem. Soc.,Article,Scopus,,2-s2.0-84892989579,,Germany;Canada,tu-cottbus.de,,,"Kramm, U.I.; Lefevre, M.; Larouche, N.; Schmeisser, D.; Dodelet, J.-P."
"Wang, Q.Y., Guo, J., Zhao, J.Q., Wang, W., Lu, S., Qie, J.M., Rummeli, M.H., Yang, R.Z.",Coupled soft-hard template-derived hierarchical porous Fe-N/C electrocatalysts facilitating efficient oxygen reduction in proton exchange membrane fuel cells,2026,CARBON,246,,120928,,,9,0,10.1016/j.carbon.2025.120928,,"[Wang, Qunying; Guo, Jie; Zhao, Jiaqing; Wang, Wei; Lu, Shan; Rummeli, Mark H.; Yang, Ruizhi] Soochow Univ, Soochow Inst Energy & Mat Innovat, Coll Energy, Suzhou 215006, Peoples R China; [Wang, Qunying; Qie, Junmao] Inner Mongolia Univ Sci & Technol, Sch Energy & Environm, Baotou 014010, Peoples R China; [Rummeli, Mark H.] VSB Tech Univ Ostrava, Electron Beam Emergent Addit Mfg EBEAM Ctr, Ctr Nanotechnl CNT, Ctr Energy & Environm Technol, 17 Listopadu 15, Ostrava 70833, Czech Republic; [Rummeli, Mark H.] IFW Dresden, Inst Mat Chem, 20 Helmholtz Str, D-01069 Dresden, Germany",,"Due to the high energy conversion efficiency and environmental friendliness, proton exchange membrane fuel cells (PEMFCs) have attracted significant attentions for advancing clean energy technologies. However, the sluggish kinetics of the cathodic oxygen reduction reaction (ORR) severely limits the performance of PEMFCs. The high cost and poor durability of platinum-based electrocatalysts necessitate the development of alternative low-cost transition metal and N co-doped carbon (TM-N-C) catalysts. Nevertheless, the ORR activity of TM-N-C is limited by the low density of exposed active sites TM-Nx on carbon. Herein, a combined high internal phase emulsion (HIPE) soft template and ZnO hard template is developed to fabricate porous Fe and N co-doped carbon (HP-Fe-N/C) catalyst. This coupled soft-hard template approach enables the construction of a hierarchical porous structure with high exposure of Fe-Nx active sites and significantly promoted mass transport during ORR. The resultant HP-Fe-N/C demonstrates superior ORR electrocatalytic activity, achieving a high half-wave potential of 0.75 V in 0.1 M HClO4 and 0.89 V in 0.1 M KOH aqueous solution. When applied as a catalyst for the cathode of PEMFCs, the HP-Fe-N/C delivers a remarkable peak power density of 528.4 mW cm-2 and a high retention rate of 88.5 % of its initial current density after working for 10 h. This work provides a new approach for the fabrication of well-controlled hierarchical porous carbon-based electrocatalysts for the PEMFC.",Proton-exchange membrane fuel cells; Oxygen reduction reaction; Catalysts; Fe-N/C; Soft-hard template,METAL-FREE ELECTROCATALYST; N-C; CARBON; CATALYSIS; OXIDATION,Proton-exchange membrane fuel cells;Oxygen reduction reaction;Catalysts;Fe-N/C;Soft-hard template;METAL-FREE ELECTROCATALYST;N-C;CARBON;CATALYSIS;OXIDATION,yangrz@suda.edu.cn,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0008-6223,,,,English,CARBON,Article,WoS,Chemistry; Materials Science,WOS:001598896000001,2-s2.0-105019528453,China;Czech Republic;Germany,suda.edu.cn,Soochow Univ;Inner Mongolia Univ Sci & Technol;VSB Tech Univ Ostrava;IFW Dresden,"Soochow Univ, China;Inner Mongolia Univ Sci & Technol, China;VSB Tech Univ Ostrava, Czech Republic;IFW Dresden, Germany","Wang, Qunying; Guo, Jie; Zhao, Jiaqing; Wang, Wei; Lu, Shan; Qie, Junmao; Rummeli, Mark H.; Yang, Ruizhi"
"Zhou, F.Y., Ruan, Y., Zhu, M.Z., Gao, X.P., Guo, W.X., Liu, X.K., Wang, W.Y., Chen, M., Wu, G., Yao, T., Zhou, H., Wu, Y.",Coupling Single-Atom Sites and Ordered Intermetallic PtM Nanoparticles for Efficient Catalysis in Fuel Cells,2023,SMALL,19,45,,,,7,17,10.1002/smll.202302328,,"[Zhou, Fangyao; Ruan, Yaner; Zhu, Mengzhao; Gao, Xiaoping; Guo, Wenxin; Wang, Wenyu; Chen, Min; Wu, Geng; Zhou, Huang; Wu, Yuen] Univ Sci & Technol China, Sch Chem & Mat Sci, Hefei 230026, Peoples R China; [Liu, Xiaokang; Yao, Tao] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Peoples R China; [Wu, Yuen] Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China",,"The design of an efficient catalytic system with low Pt loading and excellent stability for the acidic oxygen reduction reaction is still a challenge for the extensive application of proton-exchange membrane fuel cells. Here, a gas-phase ordered alloying strategy is proposed to construct an effective synergistic catalytic system that blends PtM intermetallic compounds (PtM IMC, M = Fe, Cu, and Ni) and dense isolated transition metal sites (M-N-4) on nitrogen-doped carbon (NC). This strategy enables Pt nanoparticles and defects on the NC support to timely trap flowing metal salt without partial aggregation, which is attributed to the good diffusivity of gaseous transition metal salts with low boiling points. In particular, the resulting Pt1Fe1 IMC cooperating with Fe-N-4 sites achieves cooperative oxygen reduction with a half-wave potential up to 0.94 V and leads to a high mass activity of 0.51 A mg(Pt)(-1) and only 23.5% decay after 30 k cycles, both of which exceed DOE 2025 targets. This strategy provides a method for reducing Pt loading in fuel cells by integrating Pt-based intermetallics and single transition metal sites to produce an efficient synergistic catalytic system.",gas-phase ordered alloying strategy; intermetallic compounds; proton-exchange membrane fuel cells; single atom catalysts; synergistic catalytic systems,OXYGEN REDUCTION; CARBON; SHELL; PLATINUM; ROBUST,gas-phase ordered alloying strategy;intermetallic compounds;proton-exchange membrane fuel cells;single atom catalysts;synergistic catalytic systems;OXYGEN REDUCTION;CARBON;SHELL;PLATINUM;ROBUST,huangz02@ustc.edu.cn; yuenwu@ustc.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1613-6810,,,37431211,English,SMALL,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:001025504200001,2-s2.0-85164455061,China,ustc.edu.cn,Univ Sci & Technol China;Dalian Natl Lab Clean Energy,"Univ Sci & Technol China, China;Dalian Natl Lab Clean Energy, China","Zhou, Fangyao; Ruan, Yaner; Zhu, Mengzhao; Gao, Xiaoping; Guo, Wenxin; Liu, Xiaokang; Wang, Wenyu; Chen, Min; Wu, Geng; Yao, Tao; Zhou, Huang; Wu, Yuen"
"Chai, D., Min, X., Harada, T., Nakanishi, S., Zhang, X.",Covalent triazine framework anchored with atomically dispersed iron as an efficient catalyst for advanced oxygen reduction,2021,Colloids and Surfaces A: Physicochemical and Engineering Aspects,628,,127240,,,,9,10.1016/j.colsurfa.2021.127240,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85111888858&doi=10.1016%2Fj.colsurfa.2021.127240&partnerID=40&md5=58c3e7be292ff1f9b40d4d0751c43e6a,"School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, China; Research Center for Solar Energy Chemistry, The University of Osaka, Suita, Osaka, Japan; Ltd., Zhuhai, Guangdong, China","Chai, Dan, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, China; Min, Xiaoteng, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, China; Harada, Takashi, Research Center for Solar Energy Chemistry, The University of Osaka, Suita, Osaka, Japan; Nakanishi, Shuji, Research Center for Solar Energy Chemistry, The University of Osaka, Suita, Osaka, Japan; Zhang, Xiongwen, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, China, Ltd., Zhuhai, Guangdong, China","Developing non-precious metal electrocatalysts with high-performance is an urgent need for market entry of proton exchange membrane fuel cells (PEMFCs). Transition metal-nitrogen-carbon catalysts are suggested as efficient oxygen reduction reaction (ORR) electrocatalysts in PEMFCs. However, uncontrollable agglomeration or inhomogeneous microstructure are often generated during the thermolysis of metal/nitrogen/carbon-containing precursors, which results in incomplete active site exposure and inferior mass transport. In this study, a facile step-wise polymerization, subsequent pyrolysis method and then with NH<inf>3</inf> activation is explored to construct highly efficient Fe modified all-triazine C<inf>3</inf>N<inf>3</inf> framework for cathodic reaction of fuel cells. Due to its high specific surface area (641 m2 g−1), uniform distribution of active species, micro/mesoporous structure, conductive network and high pyridinic N and graphitic N content, the as-made Fe-C<inf>3</inf>N<inf>3</inf>-750-NH<inf>3</inf> catalyst delivers atomic sized Fe species, dominant four-electron pathway, attractive ORR performance and good stability relative to commercial Pt/C electrocatalyst. Inexpensive raw materials and facile preparation combined with superior electrocatalytic performance make Fe-C<inf>3</inf>N<inf>3</inf>-750-NH<inf>3</inf> a promising ORR catalyst, opening new avenues for application of nanostructured polymers in fuel cells. © 2021 Elsevier B.V.",Covalent triazine framework; Fe-N-C catalyst; Non-precious metal; Oxygen reduction,Ammonia; Electrocatalysts; Electrolysis; Iron; Oxygen; Precious metals; Proton exchange membrane fuel cells (PEMFC); Covalent triazine framework; Efficient catalysts; Fe-N-C catalyst; NH$-3$; Nitrogen-carbon; Non-precious metals; Oxygen Reduction; Oxygen reduction reaction; Proton-exchange membranes fuel cells; ]+ catalyst; Electrolytic reduction; iron; transition element; triazine; Article; catalyst; chemical reaction; chemical structure; covalent bond; energy dispersive X ray spectroscopy; oxygen reduction reaction; performance; polymerization; pore size distribution; pyrolysis; surface area; transmission electron microscopy; X ray photoemission spectroscopy,Covalent triazine framework;Fe-N-C catalyst;Non-precious metal;Oxygen reduction;Ammonia;Electrocatalysts;Electrolysis;Iron;Oxygen;Precious metals;Proton exchange membrane fuel cells (PEMFC);Efficient catalysts;NH$-3$;Nitrogen-carbon;Non-precious metals;Oxygen reduction reaction;Proton-exchange membranes fuel cells;]+ catalyst;Electrolytic reduction;transition element;triazine;Article;catalyst;chemical reaction;chemical structure;covalent bond;energy dispersive X ray spectroscopy;performance;polymerization;pore size distribution;pyrolysis;surface area;transmission electron microscopy;X ray photoemission spectroscopy,"X. Zhang; Key Laboratory of Thermal-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi'an Jiaotong University, 710049, China; email: xwenz@mail.xjtu.edu.cn",,,,,,Elsevier B.V.,09277757,,CPEAE,,English,Colloids Surf. A Physicochem. Eng. Asp.,Article,Scopus,,2-s2.0-85111888858,,China;Japan,mail.xjtu.edu.cn,,,"Chai, D.; Min, X.; Harada, T.; Nakanishi, S.; Zhang, X."
"Banham, D., Kishimoto, T., Zhou, Y.J., Sato, T., Bai, K., Ozaki, J., Imashiro, Y., Ye, S.Y.",Critical advancements in achieving high power and stable nonprecious metal catalyst-based MEAs for real-world proton exchange membrane fuel cell applications,2018,SCIENCE ADVANCES,4,3,eaar7180,,,7,244,10.1126/sciadv.aar7180,,"[Banham, Dustin; Zhou, Yingjie; Bai, Kyoung; Ye, Siyu] Ballard Power Syst, 9000 Glenlyon Pkwy, Burnaby, BC V5J 5J8, Canada; [Kishimoto, Takeaki; Sato, Tetsutaro; Imashiro, Yasuo] Nisshinbo Holdings Inc, Business Dev Dept, Midori Ku, 1-2-3 Onodai, Chiba 2670056, Japan; [Kishimoto, Takeaki] Gunma Univ, Grad Sch Sci & Technol, Div Environm Engn Sci, 1-5-1 Tenjin Cho, Kiryu, Gunma 3768515, Japan; [Ozaki, Jun-ichi] Gunma Univ, Fac Sci & Technol, Int Res & Educ Ctr Element Sci, Gunma 3768515, Japan",,"Despite great progress in the development of nonprecious metal catalysts (NPMCs) over the past several decades, the performance and stability of these promising catalysts have not yet achieved commercial readiness for proton exchange membrane fuel cells (PEMFCs). Through rational design of the cathode catalyst layer (CCL), we demonstrate the highest reported performance for an NPMC-based membrane electrode assembly (MEA), achieving a peak power of 570 mW/cm(2) under air. This record performance is achieved using a precommercial catalyst for which nearly all pores are <3 nm in diameter, challenging previous beliefs regarding the need for larger catalyst pores to achieve high current densities. This advance is achieved at industrially relevant scales (50 cm(2) MEA) using a precommercial NPMC. In situ electrochemical analysis of the CCLs is also used to help gain insight into the degradation mechanism observed during galvanostatic testing. Overall, the performance of this NPMC-based MEA has achieved commercial readiness and will be introduced into an NPMC-based product for portable power applications.",,OXYGEN REDUCTION REACTION; IRON-BASED CATALYSTS; N-C CATALYSTS; CATHODE CATALYST; ACTIVE-SITES; NONPLATINUM CATALYSTS; ORGANIC-FRAMEWORK; FE/N/C CATALYSTS; PERFORMANCE; STABILITY,OXYGEN REDUCTION REACTION;IRON-BASED CATALYSTS;N-C CATALYSTS;CATHODE CATALYST;ACTIVE-SITES;NONPLATINUM CATALYSTS;ORGANIC-FRAMEWORK;FE/N/C CATALYSTS;PERFORMANCE;STABILITY,dustin.banham@ballard.com; siyu.ye@ballard.com,,"1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA",,,,AMER ASSOC ADVANCEMENT SCIENCE,2375-2548,,,29582018,English,SCI ADV,Article,WoS,Science & Technology - Other Topics,WOS:000431373300036,2-s2.0-85044480269,Canada;Japan,ballard.com,Ballard Power Syst;Nisshinbo Holdings Inc;Gunma Univ,"Ballard Power Syst, Canada;Nisshinbo Holdings Inc, Japan;Gunma Univ, Japan","Banham, Dustin; Kishimoto, Takeaki; Zhou, Yingjie; Sato, Tetsutaro; Bai, Kyoung; Ozaki, Jun-ichi; Imashiro, Yasuo; Ye, Siyu"
"Guo, L.M., Wan, X., Liu, Q.T., Liu, X.F., Shang, J.X., Yu, R.H., Shui, J.L.",Critical role of carbon support in metal nanoaggregate facilitating Fe-N-C catalyst for PEM fuel cell application,2024,JOURNAL OF ENERGY CHEMISTRY,97,,,669,676,8,14,10.1016/j.jechem.2024.07.008,,"[Guo, Liming; Wan, Xin; Liu, Qingtao; Liu, Xiaofang; Shang, Jiaxiang; Yu, Ronghai; Shui, Jianglan] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China; [Shui, Jianglan] Tianmushan Lab, Hangzhou 310023, Zhejiang, Peoples R China",,"Metal nanoaggregates can simultaneously enhance the activity and stability of Fe-N-C catalysts in proton-exchange-membrane fuel cells (PEMFC). Previous studies on the relevant mechanism have focused on the direct interaction between FeN4 4 active sites and metal nanoaggregates. However, the role of carbon support that hosts metal nanoaggregates and active sites has been overlooked. Here, a Fe-N-C catalyst encapsulating inactive gold nanoparticles is prepared as a model catalyst to investigate the electronic tuning of Au nanoparticles (NPs) towards the carbon support. Au NPs donate electrons to carbon support, making it rich in p electrons, which reduces the work function and regulates the electronic configuration of the FeN4 4 sites for an enhanced ORR activity. Meanwhile, the electron-rich carbon support can mitigate the electron depletion of FeN4 4 sites caused by carbon support oxidation, thereby preserving its high activity. The yield and accumulation of H2O2 2 O 2 are thus alleviated, which delays the oxidation of the catalyst and benefits the stability. Due to the electron-rich carbon support, the composite catalyst achieves a top-level peak power density of 0.74 W/cm2 2 in a 1.5 bar H2 2-air PEMFC, as well as the improved stability. This work elucidates the key role of carbon support in the performance enhancement of the FeN-C/metal nanoaggregate composite catalysts for fuel cell application. (c) 2024 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights are reserved, including those for text and data mining, AI training, and similar technologies.",Fuel cells; Oxygen reduction reaction; Fe-N-C; Hetero-structure catalyst; Carbon support,OXYGEN REDUCTION; DOPED GRAPHENE; ACTIVE-SITES; DURABILITY; IRON; ELECTROCATALYSTS; NANOPARTICLES; PERFORMANCE; IDENTIFICATION; MODULATION,Fuel cells;Oxygen reduction reaction;Fe-N-C;Hetero-structure catalyst;Carbon support;OXYGEN REDUCTION;DOPED GRAPHENE;ACTIVE-SITES;DURABILITY;IRON;ELECTROCATALYSTS;NANOPARTICLES;PERFORMANCE;IDENTIFICATION;MODULATION,liuxf05@buaa.edu.cn; shuijianglan@buaa.edu.cn,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2095-4956,,,,English,J ENERGY CHEM,Article,WoS,Chemistry; Energy & Fuels; Engineering,WOS:001278877800001,2-s2.0-85199067644,China,buaa.edu.cn,Beihang Univ;Tianmushan Lab,"Beihang Univ, China;Tianmushan Lab, China","Guo, Liming; Wan, Xin; Liu, Qingtao; Liu, Xiaofang; Shang, Jiaxiang; Yu, Ronghai; Shui, Jianglan"
"Lin, Y.H., Li, W.J., Wang, Z.Y., Zheng, Y., Zhang, Y.N., Fu, X.G.",Current advances and performance enhancement of single atom M-N-C catalysts for PEMFCs,2025,FRONTIERS IN ENERGY,19,5,,642,669,28,0,10.1007/s11708-025-1004-6,,"[Lin, Yanhong; Li, Wenjun; Wang, Zeyu; Fu, Xiaogang] Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Atom Control & Catalysis Engn Lab, Xian 710072, Peoples R China; [Zhang, Yining] Yulin Innovat Inst Clean Energy, Yulin 719000, Shanxi, Peoples R China; [Zheng, Yun] Fuzhou Univ, Inst New Energy Mat & Engn, Sch Mat Sci & Engn, Fuzhou 350108, Peoples R China",,"Single-atom transition metal-nitrogen-doped carbons (SA M-N-Cs) catalysts are promising alternatives to platinum-based catalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). However, enhancing their performance for practical applications remains a significant challenge. This review summarizes recent advances in enhancing the intrinsic activity of SA M-N-C catalysts through various strategies, such as tuning the coordination environment and local structure of central metal atoms, heteroatom doping, and the creation of dual-/multi metal sites. Additionally, it discusses methods to increase the density of M-Nx active sites, including chelation, defect capture, cascade anchoring, spatial confinement, porous structure design, and secondary doping. Finally, it outlines future directions for developing highly active and stable SA M-N-C catalysts, providing a comprehensive framework for the design of advanced catalysts.",single atom catalysts; metal-nitrogen-carbon; oxygen reduction reaction (ORR); catalytic performance; proton exchange membrane fuel cells (PEMFCs),OXYGEN REDUCTION REACTION; ACTIVE-SITES; POROUS CARBON; DOPED CARBON; FUEL-CELLS; EFFICIENT; FE; IRON; ORR; ELECTROCATALYSIS,single atom catalysts;metal-nitrogen-carbon;oxygen reduction reaction (ORR);catalytic performance;proton exchange membrane fuel cells (PEMFCs);OXYGEN REDUCTION REACTION;ACTIVE-SITES;POROUS CARBON;DOPED CARBON;FUEL-CELLS;EFFICIENT;FE;IRON;ORR;ELECTROCATALYSIS,zhangyn@dnlyl.ac.cn; xiaogangfu@nwpu.edu.cn,,"CHAOYANG DIST, 4, HUIXINDONGJIE, FUSHENG BLDG, BEIJING 100029, PEOPLES R CHINA",,,,HIGHER EDUCATION PRESS,2095-1701,,,,English,FRONT ENERGY,Review,WoS,Energy & Fuels,WOS:001484598600001,2-s2.0-105004668825,China,dnlyl.ac.cn,Northwestern Polytech Univ;Yulin Innovat Inst Clean Energy;Fuzhou Univ,"Northwestern Polytech Univ, China;Yulin Innovat Inst Clean Energy, China;Fuzhou Univ, China","Lin, Yanhong; Li, Wenjun; Wang, Zeyu; Zheng, Yun; Zhang, Yining; Fu, Xiaogang"
"Wu, G.",Current challenge and perspective of PGM-free cathode catalysts for PEM fuel cells,2017,FRONTIERS IN ENERGY,11,3,,286,298,13,90,10.1007/s11708-017-0477-3,,"[Wu, Gang] SUNY Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA",,"To significantly reduce the cost of proton exchange membrane fuel cells, platinum-group metal (PGM)-free cathode catalysts are highly desirable. Current M-N-C (M: Fe, Co or Mn) catalysts are considered the most promising due to their encouraging performance. The challenge thus has been their stability under acidic conditions, which has hindered their use for any practical applications. In this review, based on the author's research experience in the field for more than 10 years, current challenges and possible solutions to overcome these problems were discussed. The current Edisonian approach (i.e., trial and error) to developing PGM-free catalysts has been ineffective in achieving revolutionary breakthroughs. Novel synthesis techniques based on a more methodological approach will enable atomic control and allow us to achieve optimal electronic and geometric structures for active sites uniformly dispersed within the 3D architectures. Structural and chemical controlled precursors such as metal-organic frameworks are highly desirable for making catalysts with an increased density of active sites and strengthening local bonding structures among N, C and metals. Advanced electrochemical and physical characterization, such as electron microscopy and X-ray absorption spectroscopy should be combined with first principle density functional theory (DFT) calculations to fully elucidate the active site structures.",oxygen reduction; fuel cells; cathode; nonprecious metal catalysts; carbon nanocomposites,OXYGEN-REDUCTION REACTION; NITROGEN-DOPED GRAPHENE; METAL-ORGANIC FRAMEWORKS; TRANSITION-METAL; ELECTROCATALYTIC ACTIVITY; CARBON; IRON; FE; POLYANILINE; EVOLUTION,oxygen reduction;fuel cells;cathode;nonprecious metal catalysts;carbon nanocomposites;OXYGEN-REDUCTION REACTION;NITROGEN-DOPED GRAPHENE;METAL-ORGANIC FRAMEWORKS;TRANSITION-METAL;ELECTROCATALYTIC ACTIVITY;CARBON;IRON;FE;POLYANILINE;EVOLUTION,gangwu@buffalo.edu,,"CHAOYANG DIST, 4, HUIXINDONGJIE, FUSHENG BLDG, BEIJING 100029, PEOPLES R CHINA",,,,HIGHER EDUCATION PRESS,2095-1701,,,,English,FRONT ENERGY,Review,WoS,Energy & Fuels,WOS:000410770500007,2-s2.0-85020489995,United States,buffalo.edu,SUNY Buffalo,"SUNY Buffalo, United States","Wu, Gang"
"Wong, W.Y., Rani, M.A.A.A., Loh, K.S., Lim, K.L., Minggu, L.J.",Current progress on rational design of porous MOF-derived transition metal-nitrogen-carbon as oxygen reduction reaction catalysts for proton exchange membrane fuel cells,2025,CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY,52,,101001,,,11,3,10.1016/j.cogsc.2025.101001,,"[Wong, Wai Yin; Rani, Muhammad Amirul Aiman Abdul; Loh, Kee Shyuan; Lim, Kean Long; Minggu, Lorna Jeffery] Univ Kebangsaan Malaysia, Fuel Cell Inst, Ukm Bangi 43600, Selangor, Malaysia",,"The pursuit of sustainable energy solutions has driven significant research into oxygen reduction reaction (ORR) catalysts. trogen-carbon (TM-N-C) catalysts emerge as a promising alternative to platinum due to their abundance, high surface area, and potential for single-atom catalyst formation. However, challenges related to intrinsic activity and durability hinder their widespread adoption. This mini-review highlights current advancements in MOF-derived TM-N-C catalyst development, including strategies to modulate electronic properties, create open pore structures, and introduce supportive materials. These approaches aim to enhance both activity and stability for proton exchange membrane fuel cell applications. The recent works with highest proton exchange membrane fuel cell performance and stability will be highlighted. Future research direction is proposed to achieve improved sustainability and optimal performance in various fuel cell environments.",Transition metal-nitrogen-carbon; metal-organic framework; porous; carbon; oxygen reduction reaction,N-C CATALYST; FE,Transition metal-nitrogen-carbon;metal-organic framework;porous;carbon;oxygen reduction reaction;N-C CATALYST;FE,waiyin.wong@ukm.edu.my,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2452-2236,,,,English,CURR OPIN GREEN SUST,Article,WoS,Chemistry; Science & Technology - Other Topics,WOS:001427329300001,2-s2.0-85217419349,Malaysia,ukm.edu.my,Univ Kebangsaan Malaysia,"Univ Kebangsaan Malaysia, Malaysia","Wong, Wai Yin; Rani, Muhammad Amirul Aiman Abdul; Loh, Kee Shyuan; Lim, Kean Long; Minggu, Lorna Jeffery"
"Banham, D., Ye, S.",Current status and future development of catalyst materials and catalyst layers for proton exchange membrane fuel cells: An industrial perspective,2017,ACS Energy Letters,2,3,,629,638,,544,10.1021/acsenergylett.6b00644,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85029065636&doi=10.1021%2Facsenergylett.6b00644&partnerID=40&md5=bf0cd84d23465344529717a1d28eaaeb,"Ballard Power Systems, Burnaby, BC, Canada","Banham, Dustin William H., Ballard Power Systems, Burnaby, BC, Canada; Ye, Siyu, Ballard Power Systems, Burnaby, BC, Canada","Proton exchange membrane fuel cells (PEMFCs) have already penetrated many commercial markets (e.g., portable power, backup power, materials handling, and buses) and are poised to greatly expand in the automotive market with both Toyota and Hyundai recently commercializing small fleets. As this occurs, catalysts for PEMFCs will experience ever greater demands on cost, activity, and durability. This Perspective outlines the technology timeline and characteristics of the most promising catalysts currently being developed and discusses the remaining challenges for both platinum group metal and nonprecious metal catalysts. Finally, the importance of combined catalyst and catalyst layer design strategies is highlighted, and a brief discussion on the future outlook of this field is provided. © 2017 American Chemical Society.",,Catalysts; Commerce; Materials handling; Automotive markets; Catalyst material; Commercial market; Design strategies; Non-precious metal catalysts; Platinum group metals; Proton exchange membrane fuel cell (PEMFCs); Technology Timeline; Proton exchange membrane fuel cells (PEMFC),Catalysts;Commerce;Materials handling;Automotive markets;Catalyst material;Commercial market;Design strategies;Non-precious metal catalysts;Platinum group metals;Proton exchange membrane fuel cell (PEMFCs);Technology Timeline;Proton exchange membrane fuel cells (PEMFC),"S. Ye; Ballard Power Systems, Burnaby, 9000 Glenlyon Parkway, V5J 5J8, Canada; email: siyu.ye@ballard.com",,,,,,American Chemical Society service@acs.org,,,,,English,ACS Energy Lett.,Review,Scopus,,2-s2.0-85029065636,,Canada,ballard.com,,,"Banham, D.; Ye, S."
"Pollet, B.G., Kocha, S.S., Staffell, I.",Current status of automotive fuel cells for sustainable transport,2019,CURRENT OPINION IN ELECTROCHEMISTRY,16,,,90,95,6,369,10.1016/j.coelec.2019.04.021,,"[Pollet, Bruno G.] Norwegian Univ Sci & Technol NTNU, Fac Engn, Dept Energy & Proc Engn, NO-7491 Trondheim, Norway; [Kocha, Shyam S.] Fuel Cells & Electrolyzer, Golden, CO 80401 USA; [Staffell, Iain] Imperial Coll London, Fac Nat Sci, Ctr Environm Policy, London SW7 1NE, England",,"Automotive proton-exchange membrane fuel cells (PEMFCs) have finally reached a state of technological readiness where several major automotive companies are commercially leasing and selling fuel cell electric vehicles, including Toyota, Honda, and Hyundai. These now claim vehicle speed and acceleration, refueling time, driving range, and durability that rival conventional internal combustion engines and in most cases outperform battery electric vehicles. The residual challenges and areas of improvement which remain for PEMFCs are performance at high current density, durability, and cost. These are expected to be resolved over the coming decade while hydrogen infrastructure needs to become widely available. Here, we briefly discuss the status of automotive PEMFCs, misconceptions about the barriers that platinum usage creates, and the remaining hurdles for the technology to become broadly accepted and implemented.",Fuel cell vehicles; PEM fuel cells; Platinum; Non-precious metal catalysts; Hydrogen,HYDROGEN,Fuel cell vehicles;PEM fuel cells;Platinum;Non-precious metal catalysts;Hydrogen,bruno.g.pollet@ntnu.no,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2451-9103,,,,English,CURR OPIN ELECTROCHE,Review,WoS,Chemistry; Electrochemistry; Materials Science,WOS:000485814400014,2-s2.0-85066749776,Norway;United States;United Kingdom,ntnu.no,Norwegian Univ Sci & Technol NTNU;Fuel Cells & Electrolyzer;Imperial Coll London,"Norwegian Univ Sci & Technol NTNU, Norway;Fuel Cells & Electrolyzer, United States;Imperial Coll London, United Kingdom","Pollet, Bruno G.; Kocha, Shyam S.; Staffell, Iain"
"Liu, Y.L., Li, G., Chen, M., Liu, Y.R., Qiu, T.Y., Han, X.Q., Li, J., Li, R.S., Shi, X.D., Kang, Z.Y., Pan, Q.H., Tian, X.L., Rao, P.",Curved Fe-N4 sites endows effective oxygen reduction reaction in acid medium,2025,CHEMICAL ENGINEERING JOURNAL,521,,167202,,,7,0,10.1016/j.cej.2025.167202,,"[Liu, Yalin; Chen, Min; Liu, Yurong; Qiu, Tianyu; Han, Xingqi; Li, Jing; Li, Ruisong; Shi, Xiaodong; Kang, Zhenye; Pan, Qinhe; Tian, Xinlong; Rao, Peng] Hainan Univ, Sch Chem Engn & Technol, State Key Lab Trop Ocean Engn Mat & Mat Evaluat, Hainan Prov Key Lab Fine Chem, Haikou 570228, Peoples R China; [Li, Gai] Hainan Normal Univ, Sch Chem & Chem Engn, Key Lab Electrochem Energy Storage & Energy Conver, Haikou 571158, Hainan, Peoples R China",,"Fe-N-C catalysts have emerged as the most promising alternatives to Pt-based materials for the oxygen reduction reaction (ORR) while their insufficient activity and stability remain big obstacles to the widespread application. Herein, curved Fe-N4 active sites are reported to overcome the inherent trade-off activity and stability, and the resultant catalyst (FeSA-NCc) demonstrates desirable ORR performance with a high half-wave potential of 0.836 V in acid medium. Moreover, FeSA-NCc exhibits durability over 30,000 cycles under harsh acid medium, and delivers an excellent practical performance while assembled into the proton-exchange-membrane fuel cells, exhibits a high peak power density of 755 mW cm-2 in H2-O2 fuel cell. Theoretical calculations elucidate that the concave geometry lowers the energy barrier for *O, *OH, and OH-formation while elevating the energy threshold for Fe dissolution, thereby breaking the conventional activity-stability dichotomy.",Fuel cells; Oxygen reduction reaction; Fe-N-C; Single-atom catalysts; Curved Fe-N(4 )sites,,Fuel cells;Oxygen reduction reaction;Fe-N-C;Single-atom catalysts;Curved Fe-N(4 )sites,qiuty@hainanu.edu.cn; hanxq@hainanu.edu.cn; panqh@hainanu.edu.cn; raopeng@hainanu.edu.cn,,"PO BOX 564, 1001 LAUSANNE, SWITZERLAND",,,,ELSEVIER SCIENCE SA,1385-8947,,,,English,CHEM ENG J,Article,WoS,Engineering,WOS:001583154500010,2-s2.0-105013488349,China,hainanu.edu.cn,Hainan Univ;Hainan Normal Univ,"Hainan Univ, China;Hainan Normal Univ, China","Liu, Yalin; Li, Gai; Chen, Min; Liu, Yurong; Qiu, Tianyu; Han, Xingqi; Li, Jing; Li, Ruisong; Shi, Xiaodong; Kang, Zhenye; Pan, Qinhe; Tian, Xinlong; Rao, Peng"
"Peng, Q., Zhou, J., Chen, J.T., Zhang, T., Sun, Z.M.",Cu single atoms on Ti2CO2 as a highly efficient oxygen reduction catalyst in a proton exchange membrane fuel cell,2019,JOURNAL OF MATERIALS CHEMISTRY A,7,45,,26062,26070,9,132,10.1039/c9ta08297b,,"[Peng, Qiong; Zhou, Jian; Chen, Jiatian; Zhang, Tian; Sun, Zhimei] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China; [Peng, Qiong; Zhou, Jian; Chen, Jiatian; Zhang, Tian; Sun, Zhimei] Beihang Univ, Int Res Inst Multidisciplinary Sci, Ctr Integrated Computat Mat Engn, Beijing 100191, Peoples R China",,"Although carbon-based single-atom catalysts (SACs), especially Fe-N-C, have been demonstrated as highly promising electrocatalysts for the oxygen reduction reaction (ORR) in alkaline media, their application remains a great challenge in acidic proton exchange membrane fuel cells (PEMFCs). Here, by performing high throughput first-principles calculations for 3d, 4d and 5d transition-metal single atoms immobilized on two-dimensional (2D) titanium carbide (Ti2CT and Ti3C2T) surfaces as active sites, we rationally design SACs towards a highly efficient ORR and further propose a composition descriptor to provide atomic-level insights into the structure-activity relationship. Significantly, the parameters involved in the present descriptor can be conveniently obtained from the periodic table of elements. More importantly, we found that the Ti2CO2-supported non-noble Cu SACs exhibit excellent ORR activity with much lower overpotential (0.25 V) than that of Pt/C (0.4 V), high selectivity for 4e oxygen reduction, excellent stability and acid-resistance and are quite promising ORR catalysts for PEMFCs. The present method can be extended to other 2D transition-metal carbides, i.e., MXenes.",,HETEROSTRUCTURES; ELECTROCATALYST; OXIDATION; PLATINUM; CAPACITY; HYDROGEN; DESIGN; COPPER; SITES; WATER,HETEROSTRUCTURES;ELECTROCATALYST;OXIDATION;PLATINUM;CAPACITY;HYDROGEN;DESIGN;COPPER;SITES;WATER,jzhou@buaa.edu.cn; zmsun@buaa.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000509471800033,2-s2.0-85075268673,China,buaa.edu.cn,Beihang Univ,"Beihang Univ, China","Peng, Qiong; Zhou, Jian; Chen, Jiatian; Zhang, Tian; Sun, Zhimei"
"Chung, H.T., Johnston, C.M., Artyushkova, K., Ferrandon, M., Myers, D.J., Zelenay, P.",Cyanamide-derived non-precious metal catalyst for oxygen reduction,2010,ELECTROCHEMISTRY COMMUNICATIONS,12,12,,1792,1795,4,142,10.1016/j.elecom.2010.10.027,,"[Chung, Hoon T.; Johnston, Christina M.; Zelenay, Piotr] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA; [Artyushkova, Kateryna] Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA; [Ferrandon, Magali; Myers, Deborah J.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA",,"Cyanamide was used in the preparation series of metal-nitrogen-carbon (M-N-C) oxygen reduction catalysts. The best catalyst, treated at 1050 degrees C, shows good performance versus previously reported non-precious metal catalysts with an OCV similar to 1.0 V and a current density of 105 mA/cm(2) (iR-corrected) at 0.80 V in H-2/O-2 fuel cell testing (catalyst loading: 4 mg cm(-2)). Although nitrogen content has been previously correlated positively with ORR activity, no such trend is observed here for any nitrogen type. The combined effects of nitrogen and sulfur incorporation into the carbon may account for the high activity of the 1050 degrees C catalyst. (C) 2010 Elsevier B.V. All rights reserved.",Polymer electrolyte fuel cell; Oxygen reduction reaction; Non-precious metal catalyst,PEM FUEL-CELLS; NITROGEN; ELECTROLYTE; PYROLYSIS,Polymer electrolyte fuel cell;Oxygen reduction reaction;Non-precious metal catalyst;PEM FUEL-CELLS;NITROGEN;ELECTROLYTE;PYROLYSIS,zelenay@lanl.gov,,"360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA",,,,ELSEVIER SCIENCE INC,1388-2481,,,,English,ELECTROCHEM COMMUN,Article,WoS,Electrochemistry,WOS:000285904700032,,United States,lanl.gov,Los Alamos Natl Lab;Univ New Mexico;Argonne Natl Lab,"Los Alamos Natl Lab, United States;Univ New Mexico, United States;Argonne Natl Lab, United States","Chung, Hoon T.; Johnston, Christina M.; Artyushkova, Kateryna; Ferrandon, Magali; Myers, Deborah J.; Zelenay, Piotr"
"Chon, G., Suk, M., Jaouen, F., Chung, M.W., Choi, C.H.",Deactivation of Fe-N-C catalysts during catalyst ink preparation process,2021,Catalysis Today,359,,,9,15,,9,10.1016/j.cattod.2019.03.067,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85064173851&doi=10.1016%2Fj.cattod.2019.03.067&partnerID=40&md5=9049aa479db0f94d50caeff40e58757e,"School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea; Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France","Chon, Gajeon, School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea; Suk, Minhee, School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea; Jaouen, Frédéric, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Chung, Min-wook, School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea; Choi, Chang Hyuck, School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea","The membrane electrode assembly (MEA) is a core component of low-temperature fuel cells. The first step of MEA manufacturing is the preparation of a catalyst ink suspension in which the catalyst powder is homogeneously dispersed in a liquid solvent through mechanical or sonic agitation. In this work, we have studied the effects of catalyst dispersion in water or alcohol solutions and subsequent drying processes on the physicochemical properties of Fe-N-C catalysts and their electrocatalytic oxygen reduction activities. We find that dispersing the model Fe-N-C catalyst comprising only FeN<inf>x</inf>C<inf>y</inf> moieties in water and subsequent drying treatment change neither its bulk structure nor surface composition, as indicated by various spectroscopic measurements before and after treatment. However, zeta potential measurements, which are very sensitive to the chemistry of functionalities present on the carbon surface, reveal that the Fe-N-C catalyst becomes slightly more acidic, and that the change in their acido-basicity is magnified with a) increasing treatment temperature and b) repetitions of a same wetting/drying treatment. This small change in the surface acido-basicity of the Fe-N-C catalyst results in a measurable and reproducible decrease in its electrocatalytic activity, which shows a positive correlation with the zeta potential changes measured at pH = 1. Observed on the Fe-N-C catalyst but not on Pt/C, it is surmised that the electrocatalytic activities of the oxygen-reducing FeN<inf>x</inf>C<inf>y</inf> moieties are influenced by the surface chemistry of the carbonaceous support. Since catalyst wetting and drying processes are essential for MEA fabrication for fuel cells, these results suggest that careful attention should be paid to the conditions employed to prepare and dry catalytic inks for the family of Fe-N-C catalysts in order to obtain their highest possible ORR activity. © 2019 Elsevier B.V.",Fe-N-C catalysts; Ink preparation; Non-precious metal catalysts; Oxygen reduction reaction; Proton-exchange membrane fuel cells; Sonication,Alkalinity; Catalysts; Drying; Electrolytic reduction; Gas fuel purification; Iron metallography; Oxygen; Oxygen reduction reaction; Physicochemical properties; Platinum compounds; Proton exchange membrane fuel cells (PEMFC); Sonication; Temperature; Water treatment; Wetting; Zeta potential; Electrocatalytic activity; Electrocatalytic oxygen reduction; Low temperature fuel cells; Membrane electrode assemblies; Non-precious metal catalysts; Spectroscopic measurements; Wetting and drying process; Zeta potential measurements; Iron compounds,Fe-N-C catalysts;Ink preparation;Non-precious metal catalysts;Oxygen reduction reaction;Proton-exchange membrane fuel cells;Sonication;Alkalinity;Catalysts;Drying;Electrolytic reduction;Gas fuel purification;Iron metallography;Oxygen;Physicochemical properties;Platinum compounds;Proton exchange membrane fuel cells (PEMFC);Temperature;Water treatment;Wetting;Zeta potential;Electrocatalytic activity;Electrocatalytic oxygen reduction;Low temperature fuel cells;Membrane electrode assemblies;Spectroscopic measurements;Wetting and drying process;Zeta potential measurements;Iron compounds,"M.W. Chung; School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, South Korea; email: cmw21sky@gist.ac.kr",,,,,,Elsevier B.V.,09205861,,CATTE,,English,Catal Today,Article,Scopus,,2-s2.0-85064173851,,South Korea;France,gist.ac.kr,,,"Chon, G.; Suk, M.; Jaouen, F.; Chung, M.W.; Choi, C.H."
"Sohn, Y., Kim, D.G., Lee, J.H., Lee, S., Hwang, I.S., Lee, S.H., Yoo, S.J., Kim, P.",Defect-controlled Fe-N-doped carbon nanofiber by ball-milling for oxygen reduction reaction,2020,KOREAN JOURNAL OF CHEMICAL ENGINEERING,37,6,,938,945,8,11,10.1007/s11814-020-0522-5,,"[Sohn, Yeonsun; Kim, Dong-gun; Lee, Ji Ho; Lee, Sujin; Hwang, In Seon; Lee, Soo-Hyoung; Kim, Pil] Jeonbuk Natl Univ, Sch Chem Engn, Sch Semicond & Chem Engn, Solar Energy Res Ctr, Jeonju 54896, Jeonbuk, South Korea; [Yoo, Sung Jong] Korea Inst Sci & Technol, Fuel Cell Res Ctr, Seoul 02792, South Korea; [Yoo, Sung Jong] Univ Sci & Technol UST, KIST Sch, Div Energy & Environm Technol, Seoul 02792, South Korea; [Yoo, Sung Jong] Kyung Hee Univ, KHU KIST Dept Converging Sci & Technol, Seoul 02447, South Korea",,"We demonstrate that control of the defect level on carbon materials is effective for enhancing the oxygen reduction reaction (ORR) performance of nonprecious-metal catalysts. Vapor-grown carbon nanofiber (VGCNF) with high crystallinity and high electronic conductivity was chosen as the substrate of our ORR catalysts. To induce defects on the VGCNF, it was subjected to ball-milling for various controlled times, yielding BMx-VGCNF (x represents the ball-milling time, 0-6 h). The defect level introduced on the VGCNF was effectively regulated by controlling the ball-milling time. Although the density of defect sites increased with increasing ball-milling time, the surface area was high-est in BM2-VGCNF. Nonprecious-metal ORR catalysts (BMx-Fe-VGCNF) were prepared by NH3 pyrolysis of Fe-ion-adsorbed BMx-VGCNF. The ball-milling of VGCNF was effective to introduce nitrogen onto the catalyst. In particular, the controlled ball-milling was important to generate highly active sites on the catalyst surface. Among the catalysts studied, BM2-Fe-VGCNF exhibited the best ORR performance, which was 2.5-times greater than that of BMx-Fe-VGCNF (x=4, 6).",Fuel Cells; Oxygen Reduction Reaction (ORR); Non-precious Metal Catalysts; High-energy Ball-mill; Vapor Grown Carbon Nano Fiber (VGCNF),PEM FUEL-CELLS; HIGH-PERFORMANCE; ACTIVE-SITES; ELECTROCATALYSTS; CATALYSTS; IRON; FABRICATION; MECHANISM; SURFACES; CARBIDE,Fuel Cells;Oxygen Reduction Reaction (ORR);Non-precious Metal Catalysts;High-energy Ball-mill;Vapor Grown Carbon Nano Fiber (VGCNF);PEM FUEL-CELLS;HIGH-PERFORMANCE;ACTIVE-SITES;ELECTROCATALYSTS;CATALYSTS;IRON;FABRICATION;MECHANISM;SURFACES;CARBIDE,kimpil1@jbnu.ac.kr,,"F.5, 119, ANAM-RO, SEONGBUK-GU, SEOUL 136-075, SOUTH KOREA",,,,KOREAN INSTITUTE CHEMICAL  ENGINEERS,0256-1115,,,,English,KOREAN J CHEM ENG,Article,WoS,Chemistry; Engineering,WOS:000538547300002,,South Korea,jbnu.ac.kr,Jeonbuk Natl Univ;Korea Inst Sci & Technol;Univ Sci & Technol UST;Kyung Hee Univ,"Jeonbuk Natl Univ, South Korea;Korea Inst Sci & Technol, South Korea;Univ Sci & Technol UST, South Korea;Kyung Hee Univ, South Korea","Sohn, Yeonsun; Kim, Dong-gun; Lee, Ji Ho; Lee, Sujin; Hwang, In Seon; Lee, Soo-Hyoung; Yoo, Sung Jong; Kim, Pil"
"Zhu, W.K., Liu, H.T., Pei, Y.B., Liu, T., Zhang, J.F., Liu, X., Wang, L.Q., Feng, Y.J., Yin, Y., Guiver, M.D.",Defect-Engineered ZIF-Derived Non-Pt Cathode Catalyst at 1.5 mg cm-2 Loading for Proton Exchange Membrane Fuel Cells,2023,SMALL,19,43,,,,10,12,10.1002/smll.202302090,,"[Zhu, Weikang; Liu, Haotian; Pei, Yabiao; Liu, Tao; Zhang, Junfeng; Liu, Xin; Wang, Lianqin; Yin, Yan; Guiver, Michael D.] Tianjin Univ, Sch Mech Engn, State Key Lab Engines, Tianjin 300072, Peoples R China; [Zhang, Junfeng; Yin, Yan; Guiver, Michael D.] Tianjin Univ, Natl Ind Educ Platform Energy Storage, Tianjin 300072, Peoples R China; [Feng, Yingjie] SINOPEC Beijing Res Inst Chem Ind Co Ltd, Dept Catalyt Sci, Beijing 100013, Peoples R China; [Guiver, Michael D.] HaiHe Lab Sustainable Chem Transformat, Tianjin 300192, Peoples R China",,"Due to the sluggish kinetics of the oxygen reduction reaction (ORR) by non-Pt based catalyst, high loading of catalyst is required to achieve satisfactory fuel cell performance, which inevitably leads to the increase of the catalyst layer thickness with serious mass transport resistance. Herein, a defective zeolitic imidazolate framework (ZIF) derived Co/Fe-N-C catalyst with small mesopores (2-4 nm) and high density of CoFe atomic active sites are prepared by regulating the Fe dosage and pyrolysis temperature. Molecular dynamics simulation and electrochemical tests indicate that > 2 nm mesopores show insignificant influence on the diffusion process of O-2 and H2O molecules, leading to the high utilization of active sites and low mass transport resistance. The proton exchange membrane fuel cell (PEMFC) shows a high-power density of 755 mW cm(-2) with only 1.5 mg cm(-2) of non-Pt catalyst in the cathode. No apparent performance loss caused by concentration difference can be observed, in particular in the high current density region (1 A cm(-2)). This work emphasizes the importance of small mesopore design in the Co/Fe-N-C catalyst, which is anticipated to provide essential guidance for the application of non-Pt catalysts.",defective zeolitic imidazolate frameworks (ZIFs); mass transport; mesopores; oxygen reduction reaction; proton exchange membrane fuel cells (PEMFCs),OXYGEN REDUCTION; METAL; NANOCAGES,defective zeolitic imidazolate frameworks (ZIFs);mass transport;mesopores;oxygen reduction reaction;proton exchange membrane fuel cells (PEMFCs);OXYGEN REDUCTION;METAL;NANOCAGES,geosign@tju.edu.cn; fengyj.bjhy@sinopec.com; yanyin@tju.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1613-6810,,,37376859,English,SMALL,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:001015468600001,2-s2.0-85163371847,China,tju.edu.cn,Tianjin Univ;SINOPEC Beijing Res Inst Chem Ind Co Ltd;HaiHe Lab Sustainable Chem Transformat,"Tianjin Univ, China;SINOPEC Beijing Res Inst Chem Ind Co Ltd, China;HaiHe Lab Sustainable Chem Transformat, China","Zhu, Weikang; Liu, Haotian; Pei, Yabiao; Liu, Tao; Zhang, Junfeng; Liu, Xin; Wang, Lianqin; Feng, Yingjie; Yin, Yan; Guiver, Michael D."
"Liu, J., Daio, T., Sasaki, K., Lyth, S.M.",Defective nitrogen-doped graphene foam: Clarifying the role of nitrogen in non-precious ORR catalysts,2014,ECS Transactions,64,3,,271,280,,2,10.1149/06403.0271ecst,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921306075&doi=10.1149%2F06403.0271ecst&partnerID=40&md5=e90a00f507c0faff56fa487ec12a04ea,"Faculty of Engineering, Kyushu University, Fukuoka, Fukuoka, Japan; International Research Center for Hydrogen Energy, Kyushu University, Fukuoka, Fukuoka, Japan; Next-Generation Fuel Cell Research Center (NEXT-FC), Kyushu University, Fukuoka, Fukuoka, Japan; International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka, Fukuoka, Japan","Liu, Jianfeng, Faculty of Engineering, Kyushu University, Fukuoka, Fukuoka, Japan; Daio, Takeshi, International Research Center for Hydrogen Energy, Kyushu University, Fukuoka, Fukuoka, Japan; Sasaki, Kazunari, Faculty of Engineering, Kyushu University, Fukuoka, Fukuoka, Japan, International Research Center for Hydrogen Energy, Kyushu University, Fukuoka, Fukuoka, Japan, Next-Generation Fuel Cell Research Center (NEXT-FC), Kyushu University, Fukuoka, Fukuoka, Japan, International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka, Fukuoka, Japan; Lyth, Stephen Matthew, International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka, Fukuoka, Japan","Iron-free, nitrogen-doped graphene foam is presented as a model electrocatalyst system for studying the role of nitrogen in the oxygen reduction reaction in non-precious Fe/N/C-based electrocatalysts. Due to the large surface area and high porosity, these electrocatalysts display high activity in rotating ring-disk electrode voltammetry measurements. The electron transfer number is as high as 3.6, despite the metal-free nature of this electrocatalyst. The sample with the highest activity has a significantly larger proportion of tertiary/graphite-like nitrogen, and therefore this is proposed as a 4-electron oxygen reduction active site in acid environment. © The Electrochemical Society.",,Doping (additives); Electrocatalysts; Electrolytic reduction; Graphene; Nitrogen; Oxygen; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Acid environment; Electron transfer; Large surface area; Nitrogen doped graphene; Orr catalysts; Oxygen Reduction; Oxygen reduction reaction; Rotating ring-disk electrode; Solid electrolytes,Doping (additives);Electrocatalysts;Electrolytic reduction;Graphene;Nitrogen;Oxygen;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Acid environment;Electron transfer;Large surface area;Nitrogen doped graphene;Orr catalysts;Oxygen Reduction;Oxygen reduction reaction;Rotating ring-disk electrode;Solid electrolytes,,"Shinohara, K.; Narayanan, S.R.; Swider-Lyons, K.; Weber, A.; Coutanceau, C.; Mantz, R.; Gasteiger, H.A.; Jones, D.; Edmundson, M.; Mitsushima, S.; Ramani, V.; Meas, Y.; Fuller, T.; Uchida, H.; Buchi, F.N.; Perry, K.A.; Schmidt, T.J.; Fenton, J.M.; Strasser, P.",,"14th Polymer Electrolyte Fuel Cell Symposium, PEFC 2014 - 226th ECS Meeting",Cancun,2014-10-05 through 2014-10-09,Electrochemical Society Inc. ecs@electrochem.org,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-84921306075,,Japan,No email,,,"Liu, J.; Daio, T.; Sasaki, K.; Lyth, S.M."
"Eriksson, B., Jaouen, F., Lindbergh, G., Lindstrom, R.W., Lagergren, C.",Degradation and lifetime evaluation of Fe-N-C based catalyst in PEMFC,2015,,,,,223,224,,0,,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84994570920&partnerID=40&md5=5c43201c03827fa28b7e34dabea62853,"Applied Electrochemistry, The Royal Institute of Technology (KTH), Stockholm, Stockholms, Sweden; Equipe AIME, Université de Montpellier, Montpellier, Occitanie, France","Eriksson, Björn, Applied Electrochemistry, The Royal Institute of Technology (KTH), Stockholm, Stockholms, Sweden; Jaouen, Frédéric, Equipe AIME, Université de Montpellier, Montpellier, Occitanie, France; Lindbergh, Göran, Applied Electrochemistry, The Royal Institute of Technology (KTH), Stockholm, Stockholms, Sweden; Lindström, Rakel Wreland, Applied Electrochemistry, The Royal Institute of Technology (KTH), Stockholm, Stockholms, Sweden; Lagergren, Carina, Applied Electrochemistry, The Royal Institute of Technology (KTH), Stockholm, Stockholms, Sweden","The restricted lifetime of Fe-N-C based catalysts is often assumed to be connected to the operating temperature. This study will investigate how the cell performance, electrode structure and composition vary over time, at different cell temperatures. At lower temperature, one may expect an increase in radical's stability, but a decrease in reactivity. Results show that the electrode degenerates over time, and that the electrochemical performance decay is similar for 40, 60, and 80° C. However, the loss of active sites is higher at higher temperature. This suggests that indirect production of radicals via H<inf>2</inf>O<inf>2</inf> production during ORR is higher at higher temperatures and is a key degradation mechanism for this Fe-N-C catalyst.",Degradation; NPMC; Proton exchange membrane fuel cell (PEMFC),Catalysts; Degradation; Electrochemical electrodes; Electrodes; Cell temperature; Degradation mechanism; Electrochemical performance; Electrode structure; Lifetime evaluation; Lower temperatures; NPMC; Operating temperature; Proton exchange membrane fuel cells (PEMFC),Degradation;NPMC;Proton exchange membrane fuel cell (PEMFC);Catalysts;Electrochemical electrodes;Electrodes;Cell temperature;Degradation mechanism;Electrochemical performance;Electrode structure;Lifetime evaluation;Lower temperatures;Operating temperature;Proton exchange membrane fuel cells (PEMFC),,"Barchiesi, C.; Chianella, M.; Cigolotti, V.",,"6th European Fuel Cell Technology and Applications Conference - Piero Lunghi Conference, EFC 2015",Naples,2015-12-16 through 2015-12-18,ENEA,,9788882863241,,,English,"Eur. Fuel Cell Technol. Appl. Conf. - Piero Lunghi Conf., EFC",Conference paper,Scopus,,2-s2.0-84994570920,,Sweden;France,No email,,,"Eriksson, B.; Jaouen, F.; Lindbergh, G.; Lindstrom, R.W.; Lagergren, C."
"Xia, D.S., Yu, C.C., Zhao, Y.H., Wei, Y.P., Wu, H.Y., Kang, Y.Q., Li, J., Gan, L., Kang, F.Y.","Degradation and regeneration of Fe-Nx active sites for the oxygen reduction reaction: the role of surface oxidation, Fe demetallation and local carbon microporosity",2021,CHEMICAL SCIENCE,12,34,,11576,11584,9,51,10.1039/d1sc03754d,,"[Xia, Dongsheng; Yu, Chenchen; Zhao, Yinghao; Wei, Yinping; Wu, Haiyan; Kang, Yongqiang; Li, Jia; Gan, Lin; Kang, Feiyu] Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Inst Mat Res, Shenzhen 518055, Peoples R China; [Xia, Dongsheng; Yu, Chenchen; Zhao, Yinghao; Wei, Yinping; Wu, Haiyan; Kang, Yongqiang; Li, Jia; Gan, Lin; Kang, Feiyu] Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Shenzhen Geim Graphene Res Ctr, Shenzhen 518055, Peoples R China; [Li, Jia; Kang, Feiyu] Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Guangdong Prov Key Lab Thermal Management Engn &, Shenzhen 518055, Peoples R China",,"The severe degradation of Fe-N-C electrocatalysts during a long-term oxygen reduction reaction (ORR) has become a major obstacle for application in proton-exchange membrane fuel cells. Understanding the degradation mechanism and regeneration of aged Fe-N-C catalysts would be of particular interest for extending their service life. Herein, we show that the by-product hydrogen peroxide during the ORR not only results in the oxidation of the carbon surface but also causes the demetallation of Fe active sites. Quantitative analysis reveals that the Fe demetallation constitutes the main reason for catalyst degradation, while previously reported carbon surface oxidation plays a minor role. We further reveal that post thermal annealing of the aged catalysts can transform the oxygen functional groups on the carbon surface into micropores. These newly formed micropores not only help to increase the active-site density but also the intrinsic ORR activity of the neighbouring Fe-N-4 sites, both contributing to complete activity recovery of aged Fe-N-C catalysts.",,IRON-BASED CATALYSTS; C CATALYSTS; ELECTROCATALYSTS; STABILITY; PERFORMANCE,IRON-BASED CATALYSTS;C CATALYSTS;ELECTROCATALYSTS;STABILITY;PERFORMANCE,li.jia@sz.tsinghua.edu.cn; lgan@sz.tsinghua.edu.cn; fykang@mail.tsinghua.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2041-6520,,,34567505,English,CHEM SCI,Article,WoS,Chemistry,WOS:000680835400001,2-s2.0-85114198317,China,sz.tsinghua.edu.cn,Tsinghua Univ,"Tsinghua Univ, China","Xia, Dongsheng; Yu, Chenchen; Zhao, Yinghao; Wei, Yinping; Wu, Haiyan; Kang, Yongqiang; Li, Jia; Gan, Lin; Kang, Feiyu"
"Li, L., Zhou, W., Xie, L., Yang, C., Meng, X., Gao, J.",Degradation Mechanisms and Durability Improvement Strategies of Fe-N-C Catalysts for Oxygen Reduction Reaction; Fe-N-C 氧还原电催化剂的失活机制及延寿策略,2024,Progress in Chemistry,36,3,,376,392,,4,10.7536/PC230725,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85191768409&doi=10.7536%2FPC230725&partnerID=40&md5=3af605e42e4569f86346dc04531a7619,"Harbin Institute of Technology, Harbin, Heilongjiang, China; Harbin Institute of Technology, Harbin, Heilongjiang, China","Li, Longhao, Harbin Institute of Technology, Harbin, Heilongjiang, China; Zhou, Wei, Harbin Institute of Technology, Harbin, Heilongjiang, China; Xie, Liang, Harbin Institute of Technology, Harbin, Heilongjiang, China; Yang, Chaowei, Harbin Institute of Technology, Harbin, Heilongjiang, China; Meng, Xiaoxiao, Harbin Institute of Technology, Harbin, Heilongjiang, China, Harbin Institute of Technology, Harbin, Heilongjiang, China; Gao, Jihui, Harbin Institute of Technology, Harbin, Heilongjiang, China","Among the many non-precious metal catalysts that have been reported so far, M-N-C catalysts based on transition metal-nitrogen-carbon structure are considered as the most promising candidates to replace Pt-based catalysts for oxygen reduction reaction. Compared with other M-N-C catalysts, Fe-N-C catalysts exhibit the highest ORR activity in acidic environments due to the suitable adsorption energy of oxygen-containing intermediates and thermodynamically favorable 4e pathway. However, the practical application of this catalyst is still limited by the challenge of insufficient stability under the high voltage and strong acidic conditions of PEMFC. Thus, the preparation of stable and efficient Fe-N-C catalysts still faces many challenges. In this review, we systematically summarize the common synthesis methods of Fe-N-C catalysts, including spatial confinement method and template-assisted strategy, outline the half-cell and single-cell test methods used to evaluate the catalyst stability, and analyze the reasons for the discrepancies between the two test results. In order to design highly stable catalysts, a clear knowledge and understanding of the degradation mechanism is required, so we describe four possible degradation mechanisms for Fe-N-C catalysts: demetallization, carbon oxidation, protonation, and microporous water flooding, subsequently we propose some specific strategies to enhance the stability of Fe-N-C catalysts. Finally, the future development direction of Fe-N-C catalysts is discussed in this review. It is hoped that the comprehensive and in-depth study of Fe-N-C catalysts will guide the design and development of highly stable Fe-N-C catalysts for the application of PEMFC. © 2024 Chinese Academy of Sciences. All rights reserved.",degradation mechanisms; durability improvement strategies; Fe-N-C electrocatalysts; oxygen reduction reaction; proton exchange membrane fuel cell; stability,,degradation mechanisms;durability improvement strategies;Fe-N-C electrocatalysts;oxygen reduction reaction;proton exchange membrane fuel cell;stability,"W. Zhou; School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China; email: hitzhouw@hit.edu.cn; X. Meng; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China; email: mengxiaoxiao@hit.edu.cn",,,,,,Chinese Academy of Sciences,1005281X,,,,Chinese,Progr. Chem.,Article,Scopus,,2-s2.0-85191768409,,China,hit.edu.cn,,,"Li, L.; Zhou, W.; Xie, L.; Yang, C.; Meng, X.; Gao, J."
"Goellner, V., Baldizzone, C., Schuppert, A., Sougrati, M.T., Mayrhofer, K., Jaouen, F.",Degradation of Fe/N/C catalysts upon high polarization in acid medium,2014,PHYSICAL CHEMISTRY CHEMICAL PHYSICS,16,34,,18454,18462,9,201,10.1039/c4cp02882a,,"[Goellner, Vincent; Sougrati, Moulay Tahar; Jaouen, Frederic] Inst Charles Gerhardt Montpellier, UMR 5253, F-34095 Montpellier 5, France; [Baldizzone, Claudio; Schuppert, Anna; Mayrhofer, Karl] Max Planck Inst Eisenforsch GmbH, Dept Interface Chem & Surface Engn, D-40237 Dusseldorf, Germany",,"A comprehensive study of the degradation of a highly active Fe/N/C catalyst in acid medium is reported. An accelerated aging protocol was applied in the temperature range of 20 to 80 degrees C. From fundamental rotating-disc electrode studies and polymer electrolyte membrane fuel cell investigations combined with identical-location electron microscopy and Mossbauer spectroscopy at various stages of degradation, important insights into the structural and chemical changes of the catalyst were obtained. Most importantly, the degradation is strongly enhanced at elevated temperature, which is correlated to (i) increased carbon-corrosion rate and (ii) parallel non-preferential dissolution of the FeNx-based active sites. The degradation not only leads to a decreased ORR kinetics over time but also induces significant charge- and mass-transport resistances due to the collapse of the electrode structure.",,MEMBRANE FUEL-CELLS; OXYGEN REDUCTION REACTION; CARBON CORROSION; IRON PHTHALOCYANINE; CATHODE CATALYSTS; ELECTROCATALYSTS; SURFACE; POLYANILINE; PERFORMANCE; STABILITY,MEMBRANE FUEL-CELLS;OXYGEN REDUCTION REACTION;CARBON CORROSION;IRON PHTHALOCYANINE;CATHODE CATALYSTS;ELECTROCATALYSTS;SURFACE;POLYANILINE;PERFORMANCE;STABILITY,frederic.jaouen@univ-montp2.fr,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,1463-9076,,,25070913,English,PHYS CHEM CHEM PHYS,Article,WoS,Chemistry; Physics,WOS:000341064600048,2-s2.0-84905841432,France;Germany,univ-montp2.fr,Inst Charles Gerhardt Montpellier;Max Planck Inst Eisenforsch GmbH,"Inst Charles Gerhardt Montpellier, France;Max Planck Inst Eisenforsch GmbH, Germany","Goellner, Vincent; Baldizzone, Claudio; Schuppert, Anna; Sougrati, Moulay Tahar; Mayrhofer, Karl; Jaouen, Frederic"
"Zhan, Y.F., Zeng, H.B., Zhao, T.Y., Situ, A., Yang, L.G., Zhang, Z.H., Li, P.Z., Wang, Z.C., Wen, J.X., Xie, F.Y., Chen, J., Tang, X.F., Meng, H.",Densely accessible single atom Fe sites dispersed on porous carbon as highly stable and active ORR catalyst for PEMFC,2024,INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,56,,,1049,1056,8,35,10.1016/j.ijhydene.2023.12.238,,"[Zhan, Yunfeng; Zhao, Tianyou; Situ, Ailan; Yang, Lingui; Zhang, Zehong; Li, Pingzhen; Wang, Zhaochen; Wen, Jinxiu; Tang, Xiufeng] Wuyi Univ, Res Ctr Flexible Sensing Mat & Devices, Sch Appl Phys & Mat, Jiangmen 529020, Guangdong, Peoples R China; [Zeng, Hongbin; Meng, Hui] Jinan Univ, Guangdong Prov Engn Technol Res Ctr Vacuum Coating, Guangzhou Key Lab Vacuum Coating Technol & New Ene, Dept Phys,Siyuan Lab, Guangzhou 510632, Guangdong, Peoples R China; [Xie, Fangyan; Chen, Jian] Sun Yat Sen Univ, Instrumental Anal & Res Ctr, Sch Chem, Guangzhou 510275, Guangdong, Peoples R China",,"Single-atom Fe-N-C catalysts have received ever-growing interest in proton exchange membrane fuel cells (PEMFCs) application for their utmost atomic utilization in oxygen reduction reaction (ORR). However, developing atomically dispersed Fe-N-C catalysts with both satisfactory activity and excellent stability presents great challenges. Herein, a template-activator combined strategy is developed to construct ORR catalysts with densely accessible single-atom Fe sites dispersed on hierarchically porous carbon networks. The optimized catalyst exhibits excellent oxygen reduction activity with a half-wave potential of 0.84 V and surprising stability with 93.6% retention of the initial current density after 24 hours of chronoamperometric test in acidic media. Notably, when assembled in a H2-O2 fuel cell, it shows remarkable long-term durability with only 16% loss in current density during the first 10 hours.",Oxygen reduction reaction; Single-atom catalysts; Porous carbon; Template-activator,OXYGEN REDUCTION REACTION; FUEL-CELLS; ELECTROCATALYSTS; PERFORMANCE; CHALLENGES; STABILITY; DESIGN; IRON,Oxygen reduction reaction;Single-atom catalysts;Porous carbon;Template-activator;FUEL-CELLS;ELECTROCATALYSTS;PERFORMANCE;CHALLENGES;STABILITY;DESIGN;IRON,puscj@mail.sysu.edu.cn; tbrenda@sina.com; tmh@jnu.edu.cn,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0360-3199,,,,English,INT J HYDROGEN ENERG,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels,WOS:001155914800001,2-s2.0-85181693782,China,mail.sysu.edu.cn,Wuyi Univ;Jinan Univ;Sun Yat Sen Univ,"Wuyi Univ, China;Jinan Univ, China;Sun Yat Sen Univ, China","Zhan, Yunfeng; Zeng, Hongbin; Zhao, Tianyou; Situ, Ailan; Yang, Lingui; Zhang, Zehong; Li, Pingzhen; Wang, Zhaochen; Wen, Jinxiu; Xie, Fangyan; Chen, Jian; Tang, Xiufeng; Meng, Hui"
"Mani, A., Birss, V.I.",Dependence of the oxygen reduction reaction at sol-gel derived Co-based catalysts on acidic solution pH and temperature,2012,Journal of Electroanalytical Chemistry,687,,,102,110,,8,10.1016/j.jelechem.2012.09.041,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84870283961&doi=10.1016%2Fj.jelechem.2012.09.041&partnerID=40&md5=f7726022cfeb74427ed904067d66708d,"Department of Chemistry, University of Calgary, Calgary, AB, Canada; Department of Chemistry, Simon Fraser University, Burnaby, BC, Canada","Mani, Ana, Department of Chemistry, University of Calgary, Calgary, AB, Canada, Department of Chemistry, Simon Fraser University, Burnaby, BC, Canada; Birss, Viola Ingrid, Department of Chemistry, University of Calgary, Calgary, AB, Canada","This work is focused on the oxygen reduction reaction (ORR) at non-precious metal catalysts formed using a modified sol-gel (SG) synthesis approach, in which carbon and nitrogen were added in the form of either ethylenediamine (en) or 1,2-phenylenediamine (pda) to a pre-formed Co oxide gel. It was confirmed that the Co-pda-derived material, when heat-treated at 900 °C, is a much better ORR catalyst than the analogous en-derived material, heat-treated to its optimum of 700 °C, giving an activity about 10-11 times higher and a lower H<inf>2</inf>O<inf>2</inf> yield. The ORR was examined over a range of acidic solutions (all at room temperature and an oxygen pressure of 1 atmosphere). For both catalysts, the reaction rate was found to be independent of the H + concentration at pH < 2.5, with the Co-pda and -en catalysts giving a transfer coefficient of ca. 1 and 0.5-0.7, respectively. At pH > 2.5, an unusual pH response was seen, suggestive of the development of local pH conditions inside the catalyst layer. While the catalysts were stable only to solution temperatures of ca. 55 °C, the ORR activation energy in the kinetic (E<inf>act</inf> = 34 kJ/mol) and diffusion controlled (E<inf>act</inf> = 8.8 kJ/mol) regions could still be determined. Based on all of these results, a possible mechanism for the ORR at below and above pH 2.5, for both the Co-pda and Co-en catalysts, was proposed. © 2012 Elsevier B.V. All rights reserved.",Ethylenediamine (en); Kinetics; Mechanism; Oxygen reduction; Phenylenediamine (pda); Proton exchange membrane fuel cells (PEMFCs),Activation energy; Electrolytic reduction; Enzyme kinetics; Mechanisms; Precious metals; Proton exchange membrane fuel cells (PEMFC); Reaction rates; Sol-gel process; Sol-gels; Synthesis (chemical); Acidic solutions; Carbon and nitrogen; Catalyst layers; Co-based catalysts; Co-oxides; Diffusion controlled; Ethylenediamine (en); Non-precious metal catalysts; Oxygen pressure; Oxygen Reduction; Oxygen reduction reaction; pH condition; PH response; Phenylenediamines; Room temperature; Solution temperature; Transfer coefficient; Catalysts,Ethylenediamine (en);Kinetics;Mechanism;Oxygen reduction;Phenylenediamine (pda);Proton exchange membrane fuel cells (PEMFCs);Activation energy;Electrolytic reduction;Enzyme kinetics;Mechanisms;Precious metals;Proton exchange membrane fuel cells (PEMFC);Reaction rates;Sol-gel process;Sol-gels;Synthesis (chemical);Acidic solutions;Carbon and nitrogen;Catalyst layers;Co-based catalysts;Co-oxides;Diffusion controlled;Non-precious metal catalysts;Oxygen pressure;Oxygen reduction reaction;pH condition;PH response;Phenylenediamines;Room temperature;Solution temperature;Transfer coefficient;Catalysts,"A. Mani; Department of Chemistry, University of Calgary, Calgary, AB T2N 1N4, 2500 University Drive N.W., Canada; email: amani@sfu.ca",,,,,,Elsevier B.V.,15726657,,JECHE,,English,J Electroanal Chem,Article,Scopus,,2-s2.0-84870283961,,Canada,sfu.ca,,,"Mani, A.; Birss, V.I."
"Parida, S.K., Ganguly, D., Barik, T., Sharma, R.K., Amirthapandian, S., Jena, H., Sundara, R.",Design and Performance Enhancement of Cobalt-Encapsulated Nitrogen-Doped Carbon Nanofiber Electrocatalyst through Ionic Liquid Modification for Efficient Oxygen Reduction,2023,ACS Applied Nano Materials,6,3,,1975,1984,,11,10.1021/acsanm.2c04945,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85147107332&doi=10.1021%2Facsanm.2c04945&partnerID=40&md5=c928f2df22b3020ef3f48a1ab6ea5328,"Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, TN, India; Indira Gandhi Centre for Atomic Research, Kalpakkam, TN, India; Department of Physics, Indian Institute of Technology Madras, Chennai, TN, India; Department of Chemistry, National Institute of Technology Rourkela, Rourkela, OR, India; Indus 2 Synchrotron Facility, Raja Ramanna Centre for Advanced Technology, Indore, MP, India; Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, TN, India","Parida, Sanjit Kumar, Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, TN, India, Indira Gandhi Centre for Atomic Research, Kalpakkam, TN, India; Ganguly, Dipsikha, Department of Physics, Indian Institute of Technology Madras, Chennai, TN, India; Barik, Tulasi, Department of Chemistry, National Institute of Technology Rourkela, Rourkela, OR, India; Sharma, Rajendra Kumar, Indus 2 Synchrotron Facility, Raja Ramanna Centre for Advanced Technology, Indore, MP, India; Amirthapandian, Sankarakumar, Indira Gandhi Centre for Atomic Research, Kalpakkam, TN, India, Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, TN, India; Jena, Hrudananda N., Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, TN, India, Indira Gandhi Centre for Atomic Research, Kalpakkam, TN, India; Sundara, Ramaprabhu, Department of Physics, Indian Institute of Technology Madras, Chennai, TN, India","The design of platinum-group-metal-free (PGM-free) electrocatalysts with appreciable activity and durability toward the oxygen reduction reaction (ORR) in acidic environments is a big challenge. Here, we report an efficient oxygen reduction activity of a Co-encapsulated nitrogen-doped carbon with nanofiber networks and its ionic liquid-modified interface in an acidic medium. The robust structure of the nanofibers embedded on a rigid framework derived from a zeolitic imidazole framework (ZIF-67) delivers promising activity and durability to the catalyst comparable to the state-of-the-art Pt/C. The ionic-liquid-modified catalyst shows a half-wave potential of 0.71 V vs RHE in oxygen-saturated 0.5 M H<inf>2</inf>SO<inf>4</inf> along with activity reduction by only 11 mV (E<inf>1/2</inf>) after 5000 cycles of the accelerated durability test. The catalyst also retains 71% of its original current during the short-term durability test. Furthermore, the electron transfer number and H<inf>2</inf>O<inf>2</inf> yield of the catalyst during the ORR approaches 3.88-3.90 and 5.9-4.8% in the potential range 0.4-0.7 V vs RHE. The ORR performance of the ionic-liquid-modified catalyst is superior among all ionic liquid-based non-PGM catalysts reported so far in acidic media. © 2023 American Chemical Society.",ADT; electrocatalyst; NCNF; ORR; PEMFC; PGMs,Carbon nanofibers; Catalyst activity; Cobalt; Doping (additives); Durability; Electrolytic reduction; Ionic liquids; Nitrogen; Oxygen; Proton exchange membrane fuel cells (PEMFC); Acidic media; ADT; Design enhancement; Modified catalysts; NCNF; Oxygen Reduction; Oxygen reduction reaction; P.E.M.F.C; PGM; ]+ catalyst; Electrocatalysts,ADT;electrocatalyst;NCNF;ORR;PEMFC;PGMs;Carbon nanofibers;Catalyst activity;Cobalt;Doping (additives);Durability;Electrolytic reduction;Ionic liquids;Nitrogen;Oxygen;Proton exchange membrane fuel cells (PEMFC);Acidic media;Design enhancement;Modified catalysts;Oxygen Reduction;Oxygen reduction reaction;P.E.M.F.C;PGM;]+ catalyst;Electrocatalysts,"H. Jena; Materials Chemistry Division, Materials Chemistry and Metal Fuel Cycle Group, IGCAR, Kalpakkam, 603102, India; email: hnje@igcar.gov.in; R. Sundara; Alternative Energy Nanotechnology Laboratory, Nano Functional Materials Technology Centre (NFMTC), Department of Physics, Indian Institute of Technology Madras, Chennai, 600036, India; email: ramp@iitm.ac.in",,,,,,American Chemical Society,,,,,English,ACS Appl. Nano Mat.,Article,Scopus,,2-s2.0-85147107332,,India,igcar.gov.in,,,"Parida, S.K.; Ganguly, D.; Barik, T.; Sharma, R.K.; Amirthapandian, S.; Jena, H.; Sundara, R."
"Gong, M., Mehmood, A., Guilherme Buzanich, A., Fellinger, T.P., Jackson, C., Cui, J., Drazic, G., Kucernak, A.",Designing Co–N/C Cathode Catalysts with Dense Atomic Cobalt Sites for Enhanced PEMFC Performance,2025,Advanced Science,,,,,,,0,10.1002/advs.202516060,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105019262378&doi=10.1002%2Fadvs.202516060&partnerID=40&md5=5ef472fb23f5e54b3daedb2ccd03f4fd,"White City Campus, Imperial College London, London, United Kingdom; Division 3.6 Electrochemical Energy Materials, Bundesanstalt für Materialforschung und -Prüfung, Berlin, Berlin, Germany; Division Structure Analysis, Bundesanstalt für Materialforschung und -Prüfung, Berlin, Berlin, Germany; Department of Chemical Engineering, Imperial College London, London, United Kingdom; Department of Materials Chemistry, National Institute of Chemistry Ljubljana, Ljubljana, Slovenia","Gong, Mengjun, White City Campus, Imperial College London, London, United Kingdom; Mehmood, Asad, Division 3.6 Electrochemical Energy Materials, Bundesanstalt für Materialforschung und -Prüfung, Berlin, Berlin, Germany; Guilherme Buzanich, Ana Oliveira, Division Structure Analysis, Bundesanstalt für Materialforschung und -Prüfung, Berlin, Berlin, Germany; Fellinger, Tim Patrick, Division 3.6 Electrochemical Energy Materials, Bundesanstalt für Materialforschung und -Prüfung, Berlin, Berlin, Germany; Jackson, Colleen, White City Campus, Imperial College London, London, United Kingdom; Cui, Junyi, White City Campus, Imperial College London, London, United Kingdom, Department of Chemical Engineering, Imperial College London, London, United Kingdom; Dražic̈, Goran, Department of Materials Chemistry, National Institute of Chemistry Ljubljana, Ljubljana, Slovenia; Kucernak, A. R.J., White City Campus, Imperial College London, London, United Kingdom","Metal-nitrogen/carbon (M-N/C) catalysts, particularly those incorporating Fe, Co, or Mn, are among the most promising non-platinum group catalysts for the acidic oxygen reduction reaction (ORR) in fuel cells. This study reports a Co-N/C catalyst featuring high (3 wt%) cobalt content exclusively present as atomic sites. Extended X-ray absorption fine structure analysis confirms a tetrapyridinic Co-N<inf>4</inf> coordination environment in the optimized (3.0)Co-N/CΔ catalyst. The high cobalt loading leads to a significant density of electrochemically accessible active sites, 3.58 × 1019 sites g−1, quantified via the nitrite stripping method. The catalyst demonstrates excellent ORR activity in a rotating ring-disk electrode setup, achieving a half-wave potential (E<inf>1/2</inf>) of 0.76 V at a low loading of 0.2 mg cm−2 and a mass activity of 3.5 A g−1 at 0.80 V<inf>RHE</inf>. Single-cell hydrogen-oxygen PEMFC tests achieve a peak power density exceeding 1.3 W cm−2 (iR-corrected). Under hydrogen-air condition, the catalyst delivers 0.54 A cm−2 at 0.60 V (0.39 W cm−2). Despite the intrinsically higher turnover frequency of Fe-based sites, the optimized (3.0)Co-N/CΔ catalyst achieves similar fuel cell performance to that of Fe-N/C, highlighting the critical role of site density in overall activity. © 2025 The Author(s). Advanced Science published by Wiley-VCH GmbH.",non-precious single atom catalyst; oxygen reduction reaction; proton-exchange membrane fuel cell,Atoms; Catalyst activity; Cobalt; Cobalt compounds; Cobalt deposits; Electrolytic reduction; Hydrogen; Iron compounds; Oxygen; Oxygen reduction reaction; X ray absorption; Cathode catalyst; Cobalt sites; Nitrogen-carbon; Non-precious single atom catalyst; P.E.M.F.C; Performance; Proton-exchange membranes fuel cells; Single-atoms; ]+ catalyst; Proton exchange membrane fuel cells (PEMFC),non-precious single atom catalyst;oxygen reduction reaction;proton-exchange membrane fuel cell;Atoms;Catalyst activity;Cobalt;Cobalt compounds;Cobalt deposits;Electrolytic reduction;Hydrogen;Iron compounds;Oxygen;X ray absorption;Cathode catalyst;Cobalt sites;Nitrogen-carbon;P.E.M.F.C;Performance;Proton-exchange membranes fuel cells;Single-atoms;]+ catalyst;Proton exchange membrane fuel cells (PEMFC),"A. Kucernak; Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, London, W12 0BZ, United Kingdom; email: anthony@imperial.ac.uk",,,,,,John Wiley and Sons Inc,,,,,English,Adv. Sci.,Article,Scopus,,2-s2.0-105019262378,,United Kingdom;Germany;Slovenia,imperial.ac.uk,,,"Gong, M.; Mehmood, A.; Guilherme Buzanich, A.; Fellinger, T.-P.; Jackson, C.; Cui, J.; Drazic, G.; Kucernak, A."
"Li, J.K., Bruller, S., Sabarirajan, D.C., Ranjbar-Sahraie, N., Sougrati, M.T., Cavaliere, S., Jones, D., Zenyuk, I.V., Zitolo, A., Jaouen, F.",Designing the 3D Architecture of PGM-Free Cathodes for H2/Air Proton Exchange Membrane Fuel Cells,2019,ACS APPLIED ENERGY MATERIALS,2,10,,7211,7222,23,48,10.1021/acsaem.9b01181,,"[Li, Jingkun; Bruller, Sebastian; Ranjbar-Sahraie, Nastaran; Sougrati, Moulay Tahar; Cavaliere, Sara; Jones, Deborah; Jaouen, Frederic] Univ Montpellier, CNRS, Inst Charles Gerhardt Montpellier, ENSCM,UMR 5253, Pl Eugene Bataillon, F-34095 Montpellier 5, France; [Sabarirajan, Dinesh C.] Tufts Univ, Dept Mech Engn, 200 Boston Ave,Suite 2600, Medford, MA 02155 USA; [Zenyuk, Iryna V.] Univ Calif Irvine, Dept Chem & Biomol Engn, Natl Fuel Cell Res Ctr, Irvine, CA 92697 USA; [Zitolo, Andrea] Orme Merisiers, Synchrotron SOLEIL, BP 48, F-91192 Gif Sur Yvette, France",,"Metal-nitrogen-carbon catalysts have emerged as the most promising platinum group metal-free catalysts toward oxygen reduction reaction for proton exchange membrane fuel cell (PEMFC) applications. However, their large-scale implementation in H-2/air PEMFCs is still hindered by the low density of active sites in such materials, implying the need for thick active layers with inferior mass-transport properties. In this work, the coelectrospinning of nano-ZIF-8 (a zeolitic imidazolate framework) and polyacrylonitrile results in anisotropic and microporous FeNC fibers, offering an effective approach toward active layers with hierarchical micro-, meso-, and macroporosity. X-ray computed tomography performed on the cathode ex situ reveals enhanced macroporosity of fibrous FeNC layers compared to a nonfibrous one derived from nano-ZIF-8. Applied in operando in a PEMFC, X-ray tomography showed abundant water-free macroporous voids in the fibrous FeNC layer, beneficial for the transport of reactants and products toward and away from the active sites. The combination of the Fe precursor in the electrospun solution and the high voltage applied during electrospinning is however also shown to enhance the formation of metallic Fe particles after pyrolysis, which is detrimental to the density of atomically dispersed FeNx active sites. FeNC fibrous morphology with higher density of FeNx active sites, obtained with a modified electrospinning process or other techniques, therefore holds great potential to replace Pt/C with MNC cathodes in H-2/air PEMFCs.",proton exchange membrane fuel cell; oxygen reduction reaction; iron-nitrogen-carbon catalyst; electrospinning; mass transport,OXYGEN REDUCTION ACTIVITY; N-C CATALYSTS; FE/N/C-CATALYSTS; ACTIVE-SITES; DOPED CARBON; IRON-OXIDE; PERFORMANCE; NANOFIBERS; ORR; ELECTROCATALYSTS,proton exchange membrane fuel cell;oxygen reduction reaction;iron-nitrogen-carbon catalyst;electrospinning;mass transport;OXYGEN REDUCTION ACTIVITY;N-C CATALYSTS;FE/N/C-CATALYSTS;ACTIVE-SITES;DOPED CARBON;IRON-OXIDE;PERFORMANCE;NANOFIBERS;ORR;ELECTROCATALYSTS,jingkun.li@umontpellier.fr; sara.cavaliere@umontpellier.fr; frederic.jaouen@umontpellier.fr,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2574-0962,,,,English,ACS APPL ENERG MATER,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000502688800029,2-s2.0-85073145340,France;United States,umontpellier.fr,Univ Montpellier;Tufts Univ;Univ Calif Irvine;Orme Merisiers,"Univ Montpellier, France;Tufts Univ, United States;Univ Calif Irvine, United States;Orme Merisiers, France","Li, Jingkun; Bruller, Sebastian; Sabarirajan, Dinesh C.; Ranjbar-Sahraie, Nastaran; Sougrati, Moulay Tahar; Cavaliere, Sara; Jones, Deborah; Zenyuk, Iryna V.; Zitolo, Andrea; Jaouen, Frederic"
"Im, K., Jang, J.H., Heo, J., Kim, D., Lee, K.S., Lim, H.K., Kim, J., Yoo, S.J.",Design of Co-NC as efficient electrocatalyst: The unique structure and active site for remarkable durability of proton exchange membrane fuel cells,2022,APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY,308,,121220,,,10,57,10.1016/j.apcatb.2022.121220,,"[Im, Kyungmin; Kim, Jinsoo; Yoo, Song Jong] Kyung Hee Univ, Dept Converging Sci & Technol, KHU KIST, 26 Kyungheedae ro, Seoul 02447, South Korea; [Im, Kyungmin; Jang, Jue-Hyuk; Yoo, Song Jong] Korea Inst Sci & Technol, Ctr Hydrogen Fuel Cell Res, Seoul 02792, South Korea; [Heo, Jinseo; Lim, Hyung-Kyu] Kangwon Natl Univ, Dept Chem Engn, Interdisciplinary Program Adv Funct Mat & Devices, Chunchon 24341, South Korea; [Kim, Donghwi; Kim, Jinsoo] Kyung Hee Univ, Dept Chem Engn Integrated Engn, 1732 Deogyeong daero, Yongin 17104, South Korea; [Lee, Kug-Seung] Pohang Univ Sci & Technol POSTECH, Pohang Accelerator Lab PAL, Pohang, South Korea; [Yoo, Song Jong] Univ Sci & Technol UST, KIST Sch, Div Energy & Environm Technol, Seoul 02792, South Korea",,"Fe-N-C catalysts are promising alternatives to the platinum-group catalysts for use in oxygen reduction reactions of proton exchange membrane fuel cells. However, Fe-N-C catalysts suffer from poor durability, compared to non-precious metal catalysts, because of their accelerated demetallation by the Fenton reaction. In this study, we report the synthesis of a melamine-encapsulated Co-ZnO-C composite as a precursor and template for zeoliteimidazole-frameworks (ZIF-8). This approach allows formation of Co-N-C for constructing unique structures at meso-and macropore scales, while maintaining microporosity. Density functional theory analysis confirms the superior stability of the Co-N-C catalyst over other M-N-C catalysts (M = Fe, Ni, Cr, and Mn). Furthermore, it reveals that a closed interaction between the Co-N4 moiety and organic adducts enhances oxophilicity, which prefers a 4-electron ORR activity. The Co-NC catalyst with a developed pore structure shows remarkable durability (6.7% performance degradation for 100 h) and full cell performance in H-2/O-2 under 1 bar of back pressure (723 mW/cm(2) of maximum power density). Consequently, the unique structure of the synthesized catalyst successfully translates to the computationally-established ORR activity in the half-cell; superior durability is seen in the real device operation and stability analysis. This work is expected to support next-generation fuel cell development.",Fuel cells; Spray pyrolysis; Composite materials; Oxygen reduction; Cobalt active site,OXYGEN REDUCTION REACTION; HIGH-PERFORMANCE; CATALYSTS; IRON; NANOFIBERS; NITROGEN,Fuel cells;Spray pyrolysis;Composite materials;Oxygen reduction;Cobalt active site;OXYGEN REDUCTION REACTION;HIGH-PERFORMANCE;CATALYSTS;IRON;NANOFIBERS;NITROGEN,hklim@kangwon.ac.kr; jkim21@khu.ac.kr; ysj@kist.re.kr,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0926-3373,,,,English,APPL CATAL B-ENVIRON,Article,WoS,Chemistry; Engineering,WOS:000788163800001,2-s2.0-85125264870,South Korea,kangwon.ac.kr,Kyung Hee Univ;Korea Inst Sci & Technol;Kangwon Natl Univ;Pohang Univ Sci & Technol POSTECH;Univ Sci & Technol UST,"Kyung Hee Univ, South Korea;Korea Inst Sci & Technol, South Korea;Kangwon Natl Univ, South Korea;Pohang Univ Sci & Technol POSTECH, South Korea;Univ Sci & Technol UST, South Korea","Im, Kyungmin; Jang, Jue-Hyuk; Heo, Jinseo; Kim, Donghwi; Lee, Kug-Seung; Lim, Hyung-Kyu; Kim, Jinsoo; Yoo, Song Jong"
"Chen, Y., Lin, J.",Design of efficient noble metal single-atom and cluster catalysts toward low-temperature preferential oxidation of CO in H2,2023,INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,48,64,,24788,24808,21,11,10.1016/j.ijhydene.2022.09.299,,"[Chen, Yang] Liaoning Univ, Inst Clean Energy Chem, Coll Chem, Shenyang 110036, Peoples R China; [Lin, Jian] Chinese Acad Sci, Dalian Inst Chem Phys, CAS Key Lab Sci & Technol Appl Catalysis, Dalian 116023, Peoples R China",,"The preferential oxidation of CO in H2 is attractive for the removal of trace amounts of CO to meet the requirement of proton-exchange membrane fuel cells (PEMFCs) application. The key is to design highly effective catalysts that work well in a wide range of low tem-peratures. Here, the recent progress in Au and Pt group metal catalysts for the PROX re-action is summarized, covering those with single-atom and cluster dispersed metal species with remarkable performance. Firstly, the progress of some representative catalysts is overviewed, with an emphasis on the strategies for improving low-temperature activity, selectivity, and stability. Then, special attention is focused on the key parameters affecting performance in the PROX reaction. Moreover, the reaction mechanisms in terms of adsorption and activation of reactants are discussed. Finally, the challenges and oppor-tunities are offered for guiding the design of advanced noble metal catalysts toward the PROX process. & COPY; 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.",Hydrogen; Single-atom catalysts; Clusters; CO oxidation; Mechanism,CERIA-SUPPORTED CATALYSTS; CARBON-MONOXIDE; SELECTIVE OXIDATION; H-2-RICH STREAM; HYDROGEN PROX; PLATINUM NANOPARTICLES; VERSATILE APPLICATION; FACILE SYNTHESIS; ACTIVE CATALYST; RECENT PROGRESS,Hydrogen;Single-atom catalysts;Clusters;CO oxidation;Mechanism;CERIA-SUPPORTED CATALYSTS;CARBON-MONOXIDE;SELECTIVE OXIDATION;H-2-RICH STREAM;HYDROGEN PROX;PLATINUM NANOPARTICLES;VERSATILE APPLICATION;FACILE SYNTHESIS;ACTIVE CATALYST;RECENT PROGRESS,jianlin@dicp.ac.cn,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0360-3199,,,,English,INT J HYDROGEN ENERG,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels,WOS:001048302100001,2-s2.0-85141887181,China,dicp.ac.cn,Liaoning Univ;Chinese Acad Sci,"Liaoning Univ, China;Chinese Acad Sci, China","Chen, Yang; Lin, Jian"
"Yang, Q., He, L., Ke, C., Zhong, J., Yang, W.",Design of Fe-Nx/Tungsten Carbide for Efficient Electrocatalyst Oxygen Reduction in Acidic Media,2023,Israel Journal of Chemistry,63,12,e202100053,,,,1,10.1002/ijch.202100053,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85114720757&doi=10.1002%2Fijch.202100053&partnerID=40&md5=5cd20e354211db3e407b4bc6ca443043,"College of Materials Science and Engineering, Huaqiao University, Quanzhou, Fujian, China","Yang, Qingxia, College of Materials Science and Engineering, Huaqiao University, Quanzhou, Fujian, China; He, Lijuan, College of Materials Science and Engineering, Huaqiao University, Quanzhou, Fujian, China; Ke, Chunyu, College of Materials Science and Engineering, Huaqiao University, Quanzhou, Fujian, China; Zhong, Jiaqiang, College of Materials Science and Engineering, Huaqiao University, Quanzhou, Fujian, China; Yang, Weihua, College of Materials Science and Engineering, Huaqiao University, Quanzhou, Fujian, China","Improving the activity and stability of Fe/N/C catalyst in oxygen reduction reaction (ORR) is a huge challenge in the commercial application of polymer electrolyte membrane fuel cells (PEMFCs). In the past decade, there have been significant break-throughs in the performance of transition metal catalysts, but little progress has been made in their stability. Herein, a zinc-based zeolite imidazole framework (ZIF-8) and tungsten carbide engaged strategy was reported to prepare Fe/N/C catalyst. Particularly, physical vapor deposition (PVD) was used to trap tungsten carbide nanoparticles with particle size of less than 3 nm limited into the FeNC catalytic micropores to synthesis composite catalyst (WC@FeNC). Compared with original Fe/N/C cata-lysts, confined WC nanoparticles in Fe/N/C porous has improved the ORR activity (2.7 mA mg−1 vs. 2.2 mA mg−1 at 0.85 V vs. RHE) as well as stability (decay 18.7 mV vs. 21.6 mV after 10 h charged) in 0.1 M H<inf>2</inf>SO<inf>4</inf>. This work puts forward some unique insights for improving the stability of transition metal oxygen reduction catalysts. © 2021 Wiley-VCH GmbH.",Fe/N/C catalyst; fuel cells; ORR performance,,Fe/N/C catalyst;fuel cells;ORR performance,"W. Yang; College of Materials Science and Engineering, Huaqiao University, Xiamen, 361021, China; email: yangwh@hqu.edu.cn",,,,,,John Wiley and Sons Inc,00212148,,ISJCA,,English,Isr. J. Chem.,Article,Scopus,,2-s2.0-85114720757,,China,hqu.edu.cn,,,"Yang, Q.; He, L.; Ke, C.; Zhong, J.; Yang, W."
"Liu, J., Zhang, T.",Design of Membrane Electrode Assembly with Non-precious Metal Catalyst for Self-humidifying Proton Exchange Membrane Fuel Cell,2024,"PROCEEDINGS OF THE 10TH HYDROGEN TECHNOLOGY CONVENTION, VOL 1, WHTC 2023",393,,,401,411,11,0,10.1007/978-981-99-8631-6_39,,"[Liu, Jing; Zhang, Tong] Tongji Univ, Sch Automot Studies, Shanghai 201804, Peoples R China",,"High cost is one of the key factors restricting the industrialization and commercialization of proton exchange membrane fuel cells (PEMFCs). In this paper, a low-cost membrane electrode assembly (MEA) is prepared by using a self-made non-precious metal catalyst. Through the polarization curve test of fuel cell, the optimal loading of Fe-N-S-C catalyst and the optimal ratio with Nafion ionomer are studied. When the loading of Fe-N-S-C catalyst is 2.0 mg cm(-2) and the ratio of Nafion ionomer to Fe-N-S-C catalyst is 3:7, the performance of the PEMFC is the best. The performance of MEA under different relative humidity (RH) and inlet pressure is also explored. The experimental results show that the MEA can still maintain good performance under the condition of 40% RH, which shows that this MEA has a certain self-humidifying ability. Because the nonprecious metal catalyst layer is too thick, the performance of PEMFC can be improved by increasing the inlet pressure appropriately. The durability of MEA with non-precious metal catalyst is poor, and there is still a lot of work to be done to improve the stability and durability.",Non-precious metal catalyst; MEA fabrication; Self-humidifying,GRAPHENE,Non-precious metal catalyst;MEA fabrication;Self-humidifying;GRAPHENE,tzhang@tongji.edu.cn,"Sun, H; Pei, W; Dong, Y; Yu, H; You, S","152 BEACH ROAD, #21-01/04 GATEWAY EAST, SINGAPORE, 189721, SINGAPORE",10th Hydrogen Technology Convention (WHTC),"Foshan, PEOPLES R CHINA","MAY 22-26, 2023",SPRINGER-VERLAG SINGAPORE PTE LTD,0930-8989,978-981-99-8633-0; 978-981-99-8631-6; 978-981-99-8630-9,,,English,SPRINGER PROC PHYS,Proceedings Paper,WoS,Chemistry; Electrochemistry; Energy & Fuels,WOS:001269480200039,2-s2.0-85184278587,China,tongji.edu.cn,Tongji Univ,"Tongji Univ, China","Liu, Jing; Zhang, Tong"
"Yin, Y., Liu, J., Chang, Y.F., Zhu, Y.Z., Xie, X., Qin, Y.Z., Zhang, J.F., Jiao, K., Du, Q., Guiver, M.D.",Design of Pt-C/Fe-N-S-C cathode dual catalyst layers for proton exchange membrane fuel cells under low humidity,2019,ELECTROCHIMICA ACTA,296,,,450,457,8,36,10.1016/j.electacta.2018.11.048,,"[Yin, Yan; Liu, Jing; Chang, Yafei; Xie, Xu; Qin, Yanzhou; Zhang, Junfeng; Jiao, Kui; Du, Qing; Guiver, Michael D.] Tianjin Univ, State Key Lab Engines, 135 Yaguan Rd, Tianjin 300350, Peoples R China; [Zhu, Yuanzhi; Guiver, Michael D.] Tianjin Univ, Collaborat Innovat Ctr Chem Sci & Engn, 92 Weijin Rd, Tianjin 300072, Peoples R China",,"A novel Pt-C/Fe-N-S-C cathode dual catalyst layer (CDCL) is prepared using the method of catalyst sprayed membrane. The membrane electrode assembly (MEA) fabricated from CDCL exhibits excellent water absorption and retention ability, which improves the performance of the corresponding proton exchange membrane fuel cell (PEMFC) at low humidity conditions. Fe-N-S-C catalysts with high Brunauer-Emmett-Teller surface area exhibit a remarkable water vapor sorption capacity. The effects of Fe-N-S-C content, relative humidity, and operating temperature on the performance of MEAs are investigated systematically. It is found that the optimum Fe-N-S-C content is 1.5-2.0 mg cm(-2) and the preferable operating temperature is 70 degrees C. The MEAs with CDCLs show superior performance at 20% relative humidity due to the enhanced water retention ability resulting from the Fe-N-S-C catalysts. At a constant voltage of 0.5 Vat 70 degrees C and 20% relative humidity, the novel self-humidifying MEA shows better durability than the conventional MEA (60% loss after 4 h). (C) 2018 Elsevier Ltd. All rights reserved.",Self-humidifying; Cathode dual catalyst layer; Water retention; Low humidity; Non-precious metal catalyst,OXYGEN REDUCTION REACTION; RELATIVE-HUMIDITY; SELF-HUMIDIFICATION; COMPOSITE MEMBRANES; PEMFC PERFORMANCE; HYDROGEN-PEROXIDE; IONOMER CONTENT; ELECTROLYTE; TEMPERATURE; WATER,Self-humidifying;Cathode dual catalyst layer;Water retention;Low humidity;Non-precious metal catalyst;OXYGEN REDUCTION REACTION;RELATIVE-HUMIDITY;SELF-HUMIDIFICATION;COMPOSITE MEMBRANES;PEMFC PERFORMANCE;HYDROGEN-PEROXIDE;IONOMER CONTENT;ELECTROLYTE;TEMPERATURE;WATER,geosign@tju.edu.cn; michael.guiver@outlook.com,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000454822400050,2-s2.0-85057156804,China,tju.edu.cn,Tianjin Univ,"Tianjin Univ, China","Yin, Yan; Liu, Jing; Chang, Yafei; Zhu, Yuanzhi; Xie, Xu; Qin, Yanzhou; Zhang, Junfeng; Jiao, Kui; Du, Qing; Guiver, Michael D."
"Mehmood, A., Ali, B., Gong, M., Gyu Kim, M., Kim, J.Y., Bae, J.H., Kucernak, A., Kang, Y.M., Nam, K.W.",Development of a highly active Fe–N–C catalyst with the preferential formation of atomic iron sites for oxygen reduction in alkaline and acidic electrolytes,2021,Journal of Colloid and Interface Science,596,,,148,157,,26,10.1016/j.jcis.2021.03.081,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85103795888&doi=10.1016%2Fj.jcis.2021.03.081&partnerID=40&md5=0f32d14816dfa21e09067d987a31fbd2,"Department of Energy and Materials Engineering, Dongguk University, Seoul, Seoul, South Korea; Department of Chemistry, Imperial College London, London, United Kingdom; Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; Advanced Analysis Center, Korea Institute of Science and Technology, Seoul, South Korea; Department of Materials Science and Engineering, Korea University, Seoul, South Korea","Mehmood, Asad, Department of Energy and Materials Engineering, Dongguk University, Seoul, Seoul, South Korea, Department of Chemistry, Imperial College London, London, United Kingdom; Ali, Basit, Department of Energy and Materials Engineering, Dongguk University, Seoul, Seoul, South Korea; Gong, Mengjun, Department of Chemistry, Imperial College London, London, United Kingdom; Gyu Kim, Min, Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; Kim, Jiyoung, Advanced Analysis Center, Korea Institute of Science and Technology, Seoul, South Korea; Bae, Jee-hwan, Advanced Analysis Center, Korea Institute of Science and Technology, Seoul, South Korea; Kucernak, A. R.J., Department of Chemistry, Imperial College London, London, United Kingdom; Kang, Yongmook, Department of Materials Science and Engineering, Korea University, Seoul, South Korea; Nam, Kyungwan, Department of Energy and Materials Engineering, Dongguk University, Seoul, Seoul, South Korea","Nitrogen-doped porous carbons containing atomically dispersed iron are prime candidates for substituting platinum-based catalysts for oxygen reduction reaction (ORR) in fuel cells. These carbon catalysts are classically synthesized via complicated routes involving multiple heat-treatment steps to form the desired Fe-N<inf>x</inf> sites. We herein developed a highly active Fe–N–C catalyst comprising of exclusive Fe-N<inf>x</inf> sites by a simplified solid-state synthesis protocol involving only a single heat-treatment. Imidazole is pyrolyzed in the presence of an inorganic salt-melt resulting in highly porous carbon sheets decorated with abundant Fe-N<inf>x</inf> centers, which yielded a high density of electrochemically accessible active sites (1.36 × 1019 sites g−1) as determined by the in situ nitrite stripping technique. The optimized catalyst delivered a remarkable ORR activity with a half-wave potential (E<inf>1/2</inf>) of 0.905 V<inf>RHE</inf> in alkaline electrolyte surpassing the benchmark Pt catalyst by 55 mV. In acidic electrolyte, an E<inf>1/2</inf> of 0.760 V<inf>RHE</inf> is achieved at a low loading level (0.29 mg cm−2). In PEMFC tests, a current density of 2.3 mA cm−2 is achieved at 0.90 V<inf>iR-free</inf> under H<inf>2</inf>–O<inf>2</inf> conditions, reflecting high kinetic activity of the optimized catalyst. © 2021 Elsevier Inc.",Fe–N–C; Fuel cells; Non-precious metal catalysts; Oxygen reduction reaction; Site density,Carbon; Catalyst activity; Doping (additives); Electrolytic reduction; Heat treatment; Iron; Iron compounds; Oxygen; Oxygen reduction reaction; Porous materials; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Acidic electrolytes; Alkaline electrolytes; Carbon catalysts; Half-wave potential; Kinetic activity; Oxygen Reduction; Platinum based catalyst; Solid-state synthesis; Nitrogen compounds; carbon; electrolyte; ferrous chloride; hydrogen peroxide; iron; nitrogen; oxygen; Article; catalyst; current density; extended X ray absorption fine structure spectroscopy; high resolution transmission electron microscopy; high temperature; physical chemistry; polymerization; pore size distribution; porosity; priority journal; pyrolysis; reduction (chemistry); scanning electron microscopy; surface area; synthesis; transmission electron microscopy; X ray absorption near edge structure spectroscopy; X ray absorption spectroscopy; X ray photoemission spectroscopy,Fe–N–C;Fuel cells;Non-precious metal catalysts;Oxygen reduction reaction;Site density;Carbon;Catalyst activity;Doping (additives);Electrolytic reduction;Heat treatment;Iron;Iron compounds;Oxygen;Porous materials;Proton exchange membrane fuel cells (PEMFC);Solid electrolytes;Acidic electrolytes;Alkaline electrolytes;Carbon catalysts;Half-wave potential;Kinetic activity;Oxygen Reduction;Platinum based catalyst;Solid-state synthesis;Nitrogen compounds;electrolyte;ferrous chloride;hydrogen peroxide;nitrogen;Article;catalyst;current density;extended X ray absorption fine structure spectroscopy;high resolution transmission electron microscopy;high temperature;physical chemistry;polymerization;pore size distribution;porosity;priority journal;pyrolysis;reduction (chemistry);scanning electron microscopy;surface area;synthesis;transmission electron microscopy;X ray absorption near edge structure spectroscopy;X ray absorption spectroscopy;X ray photoemission spectroscopy,"A. Mehmood; Department of Energy and Materials Engineering, Dongguk University, Seoul, 04620, South Korea; email: a.mehmood@imperial.ac.uk",,,,,,Academic Press Inc.,00219797,,JCISA,33839348,English,J. Colloid Interface Sci.,Article,Scopus,,2-s2.0-85103795888,,South Korea;United Kingdom,imperial.ac.uk,,,"Mehmood, A.; Ali, B.; Gong, M.; Gyu Kim, M.; Kim, J.-Y.; Bae, J.-H.; Kucernak, A.; Kang, Y.-M.; Nam, K.-W."
"Morita, A., Ishii, T., Ozaki, J.I.",Development of an electrochemical system to measure high-temperature oxygen reduction for the electrochemical evaluation of Pt/C and non-precious metal catalysts,2024,International Journal of Hydrogen Energy,55,,,904,908,,6,10.1016/j.ijhydene.2023.11.131,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85179680665&doi=10.1016%2Fj.ijhydene.2023.11.131&partnerID=40&md5=75739164338850535b304ee15557625d,"Faculty of Science and Technology, Gunma University, Maebashi, Gunma, Japan","Morita, Aoi, Faculty of Science and Technology, Gunma University, Maebashi, Gunma, Japan; Ishii, Takafumi, Faculty of Science and Technology, Gunma University, Maebashi, Gunma, Japan; Ozaki, Junichi, Faculty of Science and Technology, Gunma University, Maebashi, Gunma, Japan","In polymer electrolyte fuel cells, the oxygen reduction reaction (ORR) rate increases at high temperatures. Therefore, ORR catalysts must be designed for use at high temperatures and require evaluation. To address the problem of decreased dissolved oxygen concentrations in conventional channel flow double electrode (CFDE) systems, this study develops a CFDE system capable of electrochemical measurement at 120 °C that can evaluate the ORR activity of Pt-supported carbon (Pt/C) and carbon-based non-precious metal catalysts (NPMC). The ORR activity increased with an increasing reaction temperature, regardless of the catalyst, and the current density ratios at 120 °C and room temperature were estimated to be 2.4 and 5.4 for Pt/C and NPMC, respectively. This indicates that the NPMC ORR activity increased significantly with the increasing reaction temperature. This increased activation energy, which is approximately 2.3 times greater than that of Pt/C at the overpotential of 0.38 V, contributes to a significant increase in the ORR activity at higher temperatures. © 2023 Hydrogen Energy Publications LLC",Channel flow double electrode; Non-precious metal catalyst; Oxygen reduction reaction; Pt/C catalyst,Activation energy; Carbon; Catalysts; Channel flow; Dissolved oxygen; Electrochemical electrodes; Electrolytic reduction; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Carbon catalysts; Channel flow double electrodes; Electrode systems; Highest temperature; Non-precious metal catalysts; Oxygen reduction reaction; Pt-supported carbon catalyst; Reaction activity; Reaction temperature; ]+ catalyst; Precious metals,Channel flow double electrode;Non-precious metal catalyst;Oxygen reduction reaction;Pt/C catalyst;Activation energy;Carbon;Catalysts;Channel flow;Dissolved oxygen;Electrochemical electrodes;Electrolytic reduction;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Carbon catalysts;Channel flow double electrodes;Electrode systems;Highest temperature;Non-precious metal catalysts;Pt-supported carbon catalyst;Reaction activity;Reaction temperature;]+ catalyst;Precious metals,"T. Ishii; International Research and Education Center for Element Science, Faculty of Science and Technology, Gunma University, Kiryu, 1-5-1 Tenjin-cho, Gunma, 376-8515, Japan; email: ishii@gunma-u.ac.jp",,,,,,Elsevier Ltd,03603199,0080311393,IJHED,,English,Int J Hydrogen Energy,Article,Scopus,,2-s2.0-85179680665,,Japan,gunma-u.ac.jp,,,"Morita, A.; Ishii, T.; Ozaki, J.-I."
"Wang, Z.H., Zhang, J., Lu, S.F., Xiang, Y., Shao, Z.P., Jiang, S.P.","Development of In Situ Formed Metal Pyrophosphates (MP2O7, Where M = Sn, Ti, and Zr)/PA/PBI Based Composite Membranes for Fuel Cells",2023,ADVANCED SUSTAINABLE SYSTEMS,7,3,,,,17,11,10.1002/adsu.202200432,,"[Wang, Zehua; Shao, Zongping; Jiang, San Ping] Curtin Univ, WA Sch Mines Minerals Energy & Chem Engn, Perth, WA 6102, Australia; [Zhang, Jin; Lu, Shanfu; Xiang, Yan] Beihang Univ, Sch Space & Environm, Beijing Key Lab Bioinspired Energy Mat & Devices, Beijing 100191, Peoples R China; [Jiang, San Ping] Foshan Xianhu Lab Adv Energy Sci & Technol, Guangdong Lab, Foshan 528216, Peoples R China",,"Development of high temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) at elevated temperatures is important for the enhancement of tolerance toward CO impurities and for the development of non-precious metal catalysts. The key challenge in such HT-PEMFCs is the high temperature polymer electrolyte membranes. Herein, the development of in situ formed metal pyrophosphates (MP2O7, where M = Sn, Ti, and Zr) in phosphoric acid doped polybenzimidazole (PA/PBI) composite membranes for HT-PEMFCs is reported. The formation mechanism of MP2O7, and characteristics of MP2O7/PA/PBI composite membranes are studied in detail. In contrast to the rapid decay in performance of pristine PA/PBI membrane cells, the in situ formed MP2O7/PA/PBI composite membranes show significantly higher proton conductivity, improved performance, and stability at elevated temperatures of 200-250 degrees C. The best results are obtained on the in situ formed SnP2O7/PA/PBI composite membrane cells, exhibiting a high peak power density of 476 mW cm(-2) and proton conductivity of 51.3 mS cm(-1) at 250 degrees C. The excellent durability of SnP2O7/PA/PBI composite membrane is due to the uniform distribution of in situ formed SnP2O7 nanoparticles in PBI membranes and the formation of a gel-like region, thin and irregular amorphous layer on the SnP2O7 with the high acid retention ability. This effectively alleviates the PA leaching at elevated temperatures of the new HT-PEMFCs.",acid retention; high temperature polymer electrolyte membrane fuel cells; metal pyrophosphates; SnP2O7; polybenzimidazole composite membranes,PROTON CONDUCTIVITY; PHOSPHORIC-ACID; NANOCOMPOSITE MEMBRANES; GRAPHENE OXIDE; TEMPERATURE; POLYBENZIMIDAZOLE; PBI; DURABILITY; ENHANCEMENT; DISSOLUTION,acid retention;high temperature polymer electrolyte membrane fuel cells;metal pyrophosphates;SnP2O7;polybenzimidazole composite membranes;PROTON CONDUCTIVITY;PHOSPHORIC-ACID;NANOCOMPOSITE MEMBRANES;GRAPHENE OXIDE;TEMPERATURE;POLYBENZIMIDAZOLE;PBI;DURABILITY;ENHANCEMENT;DISSOLUTION,lusf@buaa.edu.cn; s.jiang@curtin.edu.au,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,2366-7486,,,,English,ADV SUSTAIN SYST,Article,WoS,Science & Technology - Other Topics; Materials Science,WOS:000903667100001,2-s2.0-85145037224,Australia;China,buaa.edu.cn,Curtin Univ;Beihang Univ;Foshan Xianhu Lab Adv Energy Sci & Technol,"Curtin Univ, Australia;Beihang Univ, China;Foshan Xianhu Lab Adv Energy Sci & Technol, China","Wang, Zehua; Zhang, Jin; Lu, Shanfu; Xiang, Yan; Shao, Zongping; Jiang, San Ping"
"Jahromi, H.S., Saxena, S., Sridhar, S., Ghantasala, M.K., Guda, R., Rozhkova, E.A.",DEVELOPMENT OF NICKEL-ZIF-8 DOPED NITROGEN REDUCED GRAPHENE OXIDE CATALYTIC MATERIALS FOR PEM FUEL CELL,2023,"PROCEEDINGS OF ASME 2023 INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, IMECE2023, VOL 7",,,,,,9,3,,,"[Jahromi, Hassan Shirzadi; Sridhar, Sudharsan; Ghantasala, Muralidhar K.] Western Michigan Univ, Mech & Aerosp Engn Dept, Kalamazoo, MI 49008 USA; [Saxena, Shivi; Guda, Ramakrishna] Western Michigan Univ, Chem Dept, Kalamazoo, MI 49008 USA; [Rozhkova, Elena A.] Argonne Natl Lab, Ctr Nanoscale Mat, Lemont, IL USA",,"This paper presents the results of our investigation on new catalyst materials for Proton-exchange membrane (PEM) fuel cells. The sluggish kinetics of the oxygen reduction reaction (ORR) and poor electrochemical durability of platinum-based catalysts necessitated the study of new materials. Recently, pyrolytic transition metal nitrogen-carbon material (M-N-C) based catalysts have gained considerable attention for their unique electronic structure and other physical properties, which can facilitate better ionic and electronic conductivities. Specifically, nickel-nitrogen-carbon (Ni-N-C) catalysts have demonstrated favorable catalytic activity and durability due to their fast electron transfer rates and improved kinetic reaction rates. This study describes a facile method for synthesizing Nitrogen-doped and pristine reduced graphene oxide (N-rGO and rGO) with Metal-Organic Framework (MOF) material, in making N-rGO-Ni-ZIFx and rGO-Ni-ZIFx Several characterization techniques, including FTIR, Raman spectroscopy, XRD, SEM, and EDS, were employed to assess the physical and chemical properties that impact the electrochemical performance of the synthesized materials. Based on the results obtained, it can be inferred that the inclusion of the transition metal and the process of high-temperature pyrolysis (at 600oC) have a considerable influence on the improvement of ORR activity. The N-rGO-Ni-ZIFx-600 sample exhibits superior ORR activity in acidic media, displaying comparable redox peaks to those observed with the commercially available 40 wt% Pt/C catalyst. The correlation of different properties with their respective electrochemical activity is discussed in this paper.",PEM Fuel cell; Catalyst modification; ZIF-8; MOF supported catalyst,OXYGEN-REDUCTION,PEM Fuel cell;Catalyst modification;ZIF-8;MOF supported catalyst;OXYGEN-REDUCTION,,,"THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA",ASME International Mechanical Engineering Congress and Exposition (IMECE),"New Orleans, LA","OCT 29-NOV 02, 2023",AMER SOC MECHANICAL ENGINEERS,,978-0-7918-8764-6,,,English,,Proceedings Paper,WoS,Engineering; Mechanics,WOS:001216784500045,2-s2.0-85185541258,United States,No email,Western Michigan Univ;Argonne Natl Lab,"Western Michigan Univ, United States;Argonne Natl Lab, United States","Jahromi, Hassan Shirzadi; Saxena, Shivi; Sridhar, Sudharsan; Ghantasala, Muralidhar K.; Guda, Ramakrishna; Rozhkova, Elena A."
"Eren, E.O., Ozkan, N., Devrim, Y.",Development of non-noble Co-N-C electrocatalyst for high-temperature proton exchange membrane fuel cells,2020,INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,45,58,,33957,33967,11,10,10.1016/j.ijhydene.2020.09.025,,"[Eren, Enis Oguzhan; Ozkan, Necati] Middle East Tech Univ, Polymer Sci & Technol, TR-06800 Ankara, Turkey; [Devrim, Yilser] Atilim Univ, Energy Syst Engn, TR-06836 Ankara, Turkey",,"The development of a non-noble Co-N/MWCNT (MWCNT = multi-walled carbon nano tubes) electrocatalyst is achieved through the high-temperature pyrolysis method and successfully characterized by five-step physico-chemical analysis. By utilizing high resolution analytical surface characterization methods, the chemical states of elements are determined, and the presence of Co-N-x sites is confirmed. ORR activity of a Co-N/MWCNT is found to be auspicious. The maximum number of transferred-electron (n) and the diffusion-limiting current density (j(d)) are calculated as 3.95 and 4.53 mA.cm(-2), respectively. The catalyst is further evaluated under a single-cell test station. The test results show that the current and power density values of Co-N/MWCNT are found superior to those of the commercial Pt/C at the 150 degrees C and 160 degrees C (e.g., 57 vs. 69 mW.cm(-2) at 150 degrees C). Due to some stability issues, it is observed that the performance of the Co-N/MWCNT catalyst is slightly decreased while switching the temperature towards 180 degrees C. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.",Co-N/MWCNT; ORR; High-temperature; PEM fuel cell; Catalysis; Non-noble,OXYGEN REDUCTION REACTION; IRON-BASED CATALYSTS; ACTIVE-SITES; FE-N/C; CARBON NANOTUBES; ACID; PERFORMANCE; FRAMEWORK; IDENTIFICATION; CHALLENGES,Co-N/MWCNT;ORR;High-temperature;PEM fuel cell;Catalysis;Non-noble;OXYGEN REDUCTION REACTION;IRON-BASED CATALYSTS;ACTIVE-SITES;FE-N/C;CARBON NANOTUBES;ACID;PERFORMANCE;FRAMEWORK;IDENTIFICATION;CHALLENGES,nozkan@metu.edu.tr,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0360-3199,,,,English,INT J HYDROGEN ENERG,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels,WOS:000593705100017,,Turkey,metu.edu.tr,Middle East Tech Univ;Atilim Univ,"Middle East Tech Univ, Turkey;Atilim Univ, Turkey","Eren, Enis Oguzhan; Ozkan, Necati; Devrim, Yilser"
"Li, X., Popov, B.N.",Development of non-precious metal catalysts for oxygen reduction reaction in fuel cells with high activity and stability,2011,ECS Transactions,41,1,,2333,2339,,0,10.1149/1.3635767,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84866391142&doi=10.1149%2F1.3635767&partnerID=40&md5=c1b7a83d6af705b4618740bb4d9d5a74,"Center for Electrochemical Engineering, Molinaroli College of Engineering and Computing, Columbia, SC, United States","Li, Xuguang, Center for Electrochemical Engineering, Molinaroli College of Engineering and Computing, Columbia, SC, United States; Popov, Branko N., Center for Electrochemical Engineering, Molinaroli College of Engineering and Computing, Columbia, SC, United States","Non-precious metal catalysts (NPMCs) with high activity and stability are developed for oxygen reduction reaction (ORR) in alkaline membrane fuel cell (AMFC). A variety of important parameters determining the performance of AMFC are systematically investigated, including the ratio of catalyst to ionomer at cathode, the flow rates of oxygen and air, and the fuel cell operating temperatures. An optimum catalyst/ionomer ratio range of 7:3 to 8:2 was found for the NPMC-based cathode in both H<inf>2</inf>/O<inf>2</inf> and H <inf>2</inf>/air cases. The operating temperature was demonstrated to play the crucial role in determining the AMFC performances. © 2011 ECS - The Electrochemical Society.",,Alkaline fuel cells; Catalysts; Cathodes; Electrolytic reduction; Oxygen; Oxygen reduction reaction; Polyelectrolytes; Precious metals; Proton exchange membrane fuel cells (PEMFC); Temperature; Alkaline membrane fuel cells; Cell operating temperature; High activity; Non-precious metal catalysts; Operating temperature; Solid electrolytes,Alkaline fuel cells;Catalysts;Cathodes;Electrolytic reduction;Oxygen;Oxygen reduction reaction;Polyelectrolytes;Precious metals;Proton exchange membrane fuel cells (PEMFC);Temperature;Alkaline membrane fuel cells;Cell operating temperature;High activity;Non-precious metal catalysts;Operating temperature;Solid electrolytes,,,,"11th Polymer Electrolyte Fuel Cell Symposium, PEFC 11 - 220th ECS Meeting",,,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-84866391142,,United States,No email,,,"Li, X.; Popov, B.N."
"Liu, G., Li, X.G., Ganesan, P., Popov, B.N.",Development of non-precious metal oxygen-reduction catalysts for PEM fuel cells based on N-doped ordered porous carbon,2009,APPLIED CATALYSIS B-ENVIRONMENTAL,93,1-2,,156,165,10,407,10.1016/j.apcatb.2009.09.025,,"[Liu, Gang; Li, Xuguang; Ganesan, Prabhu; Popov, Branko N.] Univ S Carolina, Dept Chem Engn, Ctr Electrochem Engn, Columbia, SC 29208 USA",,"N-doped ordered porous carbon (CNx) was synthesized via a nano-casting process using polyacrylonitrile (PAN) as the carbon and nitrogen precursor and mesoporous silica as a hard template. Nitrogen adsorption/desorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) were used to characterize the synthesized CNx and the derived non-precious metal oxygen-reduction catalysts. The CNx exhibited a highly ordered porosity and high graphitization with a surface area of 1132 m(2) g(-1) and a nitrogen content of 6.88 at.%. The non-precious metal oxygen-reduction catalysts were prepared by pyrolyzing iron acetate-impregnated CNx in argon, followed by post-treatments. Optimizations of the iron loading and the pyrolyzing temperature were also explored. The catalytic activities of the CNx products for the oxygen reduction reaction (ORR) were examined by rotating disc electrode (RDE) measurements and single-cell tests. The onset potential for oxygen reduction in 0.5 M H2SO4 of the best catalyst was as high as 0.88 V vs. normal hydrogen electrode (NHE). The current density obtained in an H-2/O-2 proton exchange membrane fuel cell (PEMFC) was as high as 0.6 A cm(-2) at 0.5 V with a cathode catalyst loading of 2 mg cm(-2). (C) 2009 Elsevier B.V. All rights reserved.",N-doped carbon; Ordered porosity; Oxygen reduction reaction; Non-precious metal catalysts; PEM fuel cells,FE-BASED CATALYSTS; CO-BASED CATALYSTS; ELECTROCATALYTIC ACTIVITY; MESOPOROUS CARBON; FACILE SYNTHESIS; O-2 REDUCTION; ACTIVE-CARBON; PYROLYSIS; BLACK; SITE,N-doped carbon;Ordered porosity;Oxygen reduction reaction;Non-precious metal catalysts;PEM fuel cells;FE-BASED CATALYSTS;CO-BASED CATALYSTS;ELECTROCATALYTIC ACTIVITY;MESOPOROUS CARBON;FACILE SYNTHESIS;O-2 REDUCTION;ACTIVE-CARBON;PYROLYSIS;BLACK;SITE,popov@cec.sc.edu,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0926-3373,,,,English,APPL CATAL B-ENVIRON,Article,WoS,Chemistry; Engineering,WOS:000272251600020,2-s2.0-71749112803,United States,cec.sc.edu,Univ S Carolina,"Univ S Carolina, United States","Liu, Gang; Li, Xuguang; Ganesan, Prabhu; Popov, Branko N."
"Vengatesan, S., Cho, E., Oh, I.H.",Development of non-precious oxygen reduction reaction catalyst for polymer electrolyte membrane fuel cells based on substituted cobalt porphyrins,2012,KOREAN JOURNAL OF CHEMICAL ENGINEERING,29,5,,621,626,6,14,10.1007/s11814-011-0225-z,,"[Vengatesan, Singaram; Cho, Eunae; Oh, In-Hwan] Korea Inst Sci & Technol, Fuel Cell Res Ctr, Seoul 136791, South Korea",,"Active and stable cobalt-based non-precious metal catalysts for the oxygen reduction reaction (ORR) in PEM fuel cells were developed through high-temperature pyrolysis of metal-porphyrins supported on carbon. The roles of substituted porphyrins, carbon support, and catalyst loading on ORR activity were studied using rotating disc electrode (RDE) measurements. It was observed that the carbon support plays a major role in improving the catalytic activity. The results showed that among the supported catalysts, the homemade mesocarbon-supported cobalt-porphyrin catalyst with 20 wt% loading displayed higher ORR activity; the cell performance showed maximum current density of 1.1 A cm(-2) at 0.13 V in H-2/O-2 fuel cells.",Non-precious Metal Catalyst; Metal-porphyrin; ORR Activity; Rotating Disc Electrode; Polymer Electrolyte Membrane Fuel Cells,FE-BASED CATALYSTS; CARBON-BLACK; IRON; ELECTROCATALYSTS; PYROLYSIS; STABILITY; PEMFCS,Non-precious Metal Catalyst;Metal-porphyrin;ORR Activity;Rotating Disc Electrode;Polymer Electrolyte Membrane Fuel Cells;FE-BASED CATALYSTS;CARBON-BLACK;IRON;ELECTROCATALYSTS;PYROLYSIS;STABILITY;PEMFCS,eacho@kist.re.kr,,"F.5, 119, ANAM-RO, SEONGBUK-GU, SEOUL 136-075, SOUTH KOREA",,,,KOREAN INSTITUTE CHEMICAL  ENGINEERS,0256-1115,,,,English,KOREAN J CHEM ENG,Article,WoS,Chemistry; Engineering,WOS:000303491600011,2-s2.0-84860571904,South Korea,kist.re.kr,Korea Inst Sci & Technol,"Korea Inst Sci & Technol, South Korea","Vengatesan, Singaram; Cho, Eunae; Oh, In-Hwan"
"Zhao, W.W., Niu, W.J., Li, R.J., Yu, B.X., Cai, C.Y., Wang, F.M., Xu, L.Y.",Developments and perspectives of transition metal-nitrogen-carbon catalysts with a regulated coordination environment for enhanced oxygen reduction reaction performance,2024,Inorganic Chemistry Frontiers,12,2,,479,514,,11,10.1039/d4qi02430c,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85211040662&doi=10.1039%2Fd4qi02430c&partnerID=40&md5=a9b095f3d02ed91707fb0a3ad97d8620,"State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou, Gansu, China; School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, Gansu, China","Zhao, Weiwei, State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou, Gansu, China, School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, Gansu, China; Niu, Wenjun, State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou, Gansu, China, School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, Gansu, China; Li, Ruji, State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou, Gansu, China, School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, Gansu, China; Yu, Bingxin, State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou, Gansu, China, School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, Gansu, China; Cai, Chenyu, State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou, Gansu, China, School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, Gansu, China; Wang, Fuming, State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou, Gansu, China, School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, Gansu, China; Xu, Liyang, State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou, Gansu, China, School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, Gansu, China","Owing to the sluggish kinetics of the oxygen reduction reaction (ORR) at the cathode in proton exchange membrane fuel cells (PEMFCs) and metal-air batteries, high-performance catalysts are usually required to reduce the reaction overpotential in these devices for practical applications. Among the various electrocatalysts, the most effective are platinum group metal (PGM) catalysts; however, they suffer from the drawbacks of high cost, scarcity, and poor cycling stability. Accordingly, platinum group metal-free (PGM-free) catalysts, especially transition metal and nitrogen co-doped carbon (TM-N-C) catalysts, including single-atom catalysts and single-atom and cluster/nanoparticle catalysts, have recently received increasing attention due to their low-cost, high atom-utilization and remarkable ORR performance. However, TM-N-C catalysts with different local coordination environments typically exhibit completely different ORR catalytic activity and selectivity in both alkaline and acidic media. Therefore, the research progress on TM-N-C catalysts with a regulated coordination environment for enhanced ORR performance are systematically summarized in this review. Specially, the strategies for regulating the coordination environment of TM-N-C catalysts are emphasized, including coordination number regulation, types of N regulation, heteroatom coordination or doping in M-N<inf>x</inf>, and synergies of clusters or nanoparticles in M-N<inf>x</inf>. Finally, the key challenges and prospects regarding the future development of catalysts with a regulated coordination environment for ORR in this emerging field are discussed. © 2025 The Royal Society of Chemistry.",,Bioremediation; Metal-air batteries; Oxygen reduction reaction; Palladium; Palladium compounds; Platinum; Semiconductor doping; Zero-carbon; Carbon catalysts; Co-doped; Coordination environment; Doped carbons; Nitrogen-carbon; Platinum group metals; Reaction performance; Single-atoms; ]+ catalyst; Electrolytic reduction,Bioremediation;Metal-air batteries;Oxygen reduction reaction;Palladium;Palladium compounds;Platinum;Semiconductor doping;Zero-carbon;Carbon catalysts;Co-doped;Coordination environment;Doped carbons;Nitrogen-carbon;Platinum group metals;Reaction performance;Single-atoms;]+ catalyst;Electrolytic reduction,"W.-J. Niu; State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou, 730050, China; email: niuwenjun@lut.edu.cn",,,,,,Royal Society of Chemistry,20521545,,,,English,Inorg. Chem. Front.,Review,Scopus,,2-s2.0-85211040662,,China,lut.edu.cn,,,"Zhao, W.-W.; Niu, W.-J.; Li, R.-J.; Yu, B.-X.; Cai, C.-Y.; Wang, F.-M.; Xu, L.-Y."
"Chung, H.T., Cullen, D.A., Higgins, D., Sneed, B.T., Holby, E.F., More, K.L., Zelenay, P.",Direct atomic-level insight into the active sites of a high-performance PGM-free ORR catalyst,2017,SCIENCE,357,6350,,479,483,5,1541,10.1126/science.aan2255,,"[Chung, Hoon T.; Higgins, Drew; Zelenay, Piotr] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA; [Cullen, David A.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA; [Sneed, Brian T.; More, Karren L.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA; [Holby, Edward F.] Los Alamos Natl Lab, Sigma Div, Oak Ridge, TN 37831 USA",,"Platinum group metal-free (PGM-free) metal-nitrogen-carbon catalysts have emerged as a promising alternative to their costly platinum (Pt)-based counterparts in polymer electrolyte fuel cells (PEFCs) but still face some major challenges, including (i) the identification of the most relevant catalytic site for the oxygen reduction reaction (ORR) and (ii) demonstration of competitive PEFC performance under automotive-application conditions in the hydrogen (H2)-air fuel cell. Herein, we demonstrate H2-air performance gains achieved with an iron-nitrogen-carbon catalyst synthesized with two nitrogen precursors that developed hierarchical porosity. Current densities recorded in the kinetic region of cathode operation, at fuel cell voltages greater than similar to 0.75 V, were the same as those obtained with a Pt cathode at a loading of 0.1 milligram of Pt per centimeter squared. The proposed catalytic active site, carbon-embedded nitrogen-coordinated iron (FeN4), was directly visualized with aberration-corrected scanning transmission electron microscopy, and the contributions of these active sites associated with specific lattice-level carbon structures were explored computationally.",,OXYGEN REDUCTION REACTION; NONPRECIOUS METAL CATALYST; NITROGEN-DOPED GRAPHENE; PEM FUEL-CELL; CATHODE CATALYSTS; CARBON; IRON; ELECTROCATALYSTS; POLYANILINE; ELECTROREDUCTION,OXYGEN REDUCTION REACTION;NONPRECIOUS METAL CATALYST;NITROGEN-DOPED GRAPHENE;PEM FUEL-CELL;CATHODE CATALYSTS;CARBON;IRON;ELECTROCATALYSTS;POLYANILINE;ELECTROREDUCTION,zelenay@lanl.gov,,"1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA",,,,AMER ASSOC ADVANCEMENT SCIENCE,0036-8075,,,28774924,English,SCIENCE,Article,WoS,Science & Technology - Other Topics,WOS:000406840100032,,United States,lanl.gov,Los Alamos Natl Lab;Oak Ridge Natl Lab,"Los Alamos Natl Lab, United States;Oak Ridge Natl Lab, United States","Chung, Hoon T.; Cullen, David A.; Higgins, Drew; Sneed, Brian T.; Holby, Edward F.; More, Karren L.; Zelenay, Piotr"
"Xia, D.S., Yang, X., Xie, L., Wei, Y.P., Jiang, W., Dou, M., Li, X.N., Li, J., Gan, L., Kang, F.Y.",Direct Growth of Carbon Nanotubes Doped with Single Atomic Fe-N4 Active Sites and Neighboring Graphitic Nitrogen for Efficient and Stable Oxygen Reduction Electrocatalysis,2019,ADVANCED FUNCTIONAL MATERIALS,29,49,1906174,,,10,242,10.1002/adfm.201906174,,"[Xia, Dongsheng; Yang, Xin; Wei, Yinping; Jiang, Wulv; Dou, Miao; Li, Jia; Gan, Lin; Kang, Feiyu] Tsinghua Univ, Grad Sch Shenzhen, Shenzhen Geim Graphene Res Ctr, Div Energy & Environm, Shenzhen 518055, Peoples R China; [Xie, Lin] Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China; [Li, Xuning] Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 639798, Singapore",,"Single atomic Fe-N-x moieties embedded on a high surface area carbon (Fe-N/C) represents one of the most promising nonprecious metal electrocatalysts for the oxygen reduction reaction (ORR) in polymer electrolyte membrane fuel cells. While significant progress has been made in the preparation of Fe-N/C catalysts with high-density Fe-N-x sites, key structural descriptors determining the intrinsic activity of the Fe center remain elusive, and effective ways to enhance the intrinsic activity are still lacking. Moreover, most Fe-N/C catalysts developed to date are built on carbons with rather low graphitization degree, which suffer from relatively severe carbon corrosion and thereby poor stability. The direct growth of carbon nanotubes doped with high-density Fe-N-x sites neighbored with graphitic-nitrogen-rich environment is reported here, which are successfully applied as a both active and stable ORR electrocatalyst in fuel cells. Combining both experiments and density functional theory calculations, it is revealed that the neighboring graphitic nitrogen can effectively induce higher filling degree of d-orbitals and simultaneously decrease on-site magnetic moment (namely, lowered spin) of the Fe center, which can optimize the binding energies of ORR intermediates and thereby substantially enhance intrinsic ORR activity.",carbon nanotubes; graphitic nitrogen; oxygen reduction reaction; single atomic FeN4; stability,PEM FUEL-CELL; IRON-BASED CATALYSTS; FE-BASED CATALYSTS; METAL ELECTROCATALYSTS; ELECTROREDUCTION; STABILITY; GRAPHENE; DENSITY; SUPPORT; ORR,carbon nanotubes;graphitic nitrogen;oxygen reduction reaction;single atomic FeN4;stability;PEM FUEL-CELL;IRON-BASED CATALYSTS;FE-BASED CATALYSTS;METAL ELECTROCATALYSTS;ELECTROREDUCTION;GRAPHENE;DENSITY;SUPPORT;ORR,lijia@phys.tsinghua.edu.cn; lgan@sz.tsinghua.edu.cn; fykang@mail.tsinghua.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1616-301X,,,,English,ADV FUNCT MATER,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000486257900001,2-s2.0-85073809723,China;Singapore,phys.tsinghua.edu.cn,Tsinghua Univ;Southern Univ Sci & Technol;Nanyang Technol Univ,"Tsinghua Univ, China;Southern Univ Sci & Technol, China;Nanyang Technol Univ, Singapore","Xia, Dongsheng; Yang, Xin; Xie, Lin; Wei, Yinping; Jiang, Wulv; Dou, Miao; Li, Xuning; Li, Jia; Gan, Lin; Kang, Feiyu"
"Normile, S.J., Sabarirajan, D.C., Calzada, O., de Andrade, V., Xiao, X., Mandal, P., Parkinson, D.Y., Serov, A., Atanassov, P., Zenyuk, I.",Direct observations of liquid water formation at nano- and micro-scale in platinum group metal-free electrodes by operando X-ray computed tomography,2018,Materials Today Energy,9,,,187,197,,68,10.1016/j.mtener.2018.05.011,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85047267268&doi=10.1016%2Fj.mtener.2018.05.011&partnerID=40&md5=7f55e70ce9f454f2973bcbab8191f075,"Tufts School of Engineering, Medford, MA, United States; The Advanced Photon Source, Lemont, IL, United States; Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Center for Micro-Engineered Materials, University of New Mexico School of Engineering, Albuquerque, NM, United States; Tufts School of Engineering, Medford, MA, United States","Normile, Stanley J., Tufts School of Engineering, Medford, MA, United States; Sabarirajan, Dinesh C., Tufts School of Engineering, Medford, MA, United States; Calzada, Osvaldo, Tufts School of Engineering, Medford, MA, United States; de Andrade, Vincent Joseph, The Advanced Photon Source, Lemont, IL, United States; Xiao, Xianghui, The Advanced Photon Source, Lemont, IL, United States; Mandal, Pratiti, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Parkinson, Dilworth Y., Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Serov, Alexey Alexandrovich, Center for Micro-Engineered Materials, University of New Mexico School of Engineering, Albuquerque, NM, United States; Atanassov, Plamen B., Center for Micro-Engineered Materials, University of New Mexico School of Engineering, Albuquerque, NM, United States; Zenyuk, Iryna V., Tufts School of Engineering, Medford, MA, United States, Tufts School of Engineering, Medford, MA, United States","Platinum group metal (PGM)-free catalyst materials are promising alternatives to Platinum-based catalysts for use in polymer electrolyte fuel cells (PEFCs). The reduced cost and abundancy of the PGM-free catalyst materials can be potentially transformative. Catalytic activity, associated with atomically dispersed transition metal active sites, is intimately linked with the emerging morphology of the carbonaceous graphene-like material at nano-scale. Optimizing the morphology of these PGM-free catalyst layers for enhanced transport properties at the nano and micro-scales is critical for achieving overall performance, expressed as power-density, needed to make such materials technologically attractive. Unfortunately, the current understandings of both morphology and transport processes are very limited due to the novelty of the materials and the challenges in designing operando characterization techniques. In order to bridge these gaps in understanding, we used operando synchrotron X-ray computed tomography to visualize water transport in operating PEFCs. We found that liquid water pooled at the components interfaces and within larger catalyst layer voids. In the smaller macro-pores, ionomer swelling was observed under humidified conditions with nano X-ray computed tomography. These previously unknown insights will provide guidance on electrode and interface design to improve water management and power density of the PEFC with cost-effective PGM-free electrocatalysts. © 2018 Elsevier Ltd",Operando synchrotron X-ray computed tomography; Polymer electrolyte fuel cells; Transition metal-nitrogen-carbon catalysts,Catalyst activity; Computerized tomography; Cost effectiveness; Electrocatalysts; Electrodes; Morphology; Nanotechnology; Phase interfaces; Platinum; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Swelling; Transition metals; X rays; Characterization techniques; Direct observations; Nitrogen-carbon; Platinum based catalyst; Platinum group metals; Polymer electrolyte fuel cells; Synchrotron x rays; X-ray computed tomography; Solid electrolytes,Operando synchrotron X-ray computed tomography;Polymer electrolyte fuel cells;Transition metal-nitrogen-carbon catalysts;Catalyst activity;Computerized tomography;Cost effectiveness;Electrocatalysts;Electrodes;Morphology;Nanotechnology;Phase interfaces;Platinum;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Swelling;Transition metals;X rays;Characterization techniques;Direct observations;Nitrogen-carbon;Platinum based catalyst;Platinum group metals;Synchrotron x rays;X-ray computed tomography;Solid electrolytes,"I.V. Zenyuk; Department of Mechanical Engineering, Tufts University, Medford, 02155, United States; email: Iryna.Zenyuk@tufts.edu",,,,,,Elsevier Ltd,,,,,English,Mater. Today Energy,Article,Scopus,,2-s2.0-85047267268,,United States,tufts.edu,,,"Normile, S.J.; Sabarirajan, D.C.; Calzada, O.; de Andrade, V.; Xiao, X.; Mandal, P.; Parkinson, D.Y.; Serov, A.; Atanassov, P.; Zenyuk, I."
"Choi, I.A., Kwak, D.H., Han, S.B., Park, J.Y., Park, H.S., Ma, K.B., Kim, D.H., Won, J.E., Park, K.W.",Doped porous carbon nanostructures as non-precious metal catalysts prepared by amino acid glycine for oxygen reduction reaction,2017,APPLIED CATALYSIS B-ENVIRONMENTAL,211,,,235,244,10,59,10.1016/j.apcatb.2017.04.039,,"[Choi, In-Ae; Kwak, Da-Hee; Han, Sang-Beom; Park, Jin-Young; Park, Hyun-Seok; Ma, Kyeng-Bae; Kim, Do-Hyoung; Won, Ji-Eun; Park, Kyung-Won] Soongsil Univ, Dept Chem Engn, Seoul 156743, South Korea",,"To replace Pt-based catalysts for oxygen reduction reactions in polymer electrolyte membrane fuel cells, various carbon nanostructures doped by transition metals and heteroatoms have been investigated. In this study, we synthesized bi-modal porous iron and nitrogen doped carbon nanostructures as non precious metal catalysts using glycine as a dopant and carbon source in the presence of iron salt. The samples exhibited a bi-modal porous structure consisting of macro- and meso-pores of 500 and 20 nm, respectively, and specific surface areas of 214-740 m(2) g(-1), which facilitate electrochemical reactions due to increased amounts of electrochemical active sites and favorable mass transport. Furthermore, the porous carbon nanostructures showed considerable amounts of dopants, high crystallinity, and excellent electrical conductivity. Especially, the sample prepared using 500 and 20 nm silica beads with both glycine and iron salt showed improved catalytic activity in both acidic and alkaline media comparable to that of a commercial Pt catalyst. (C) 2017 Elsevier B.V. All rights reserved.",Glycine; Doping source; Porous carbon; Non-precious metal catalyst; Oxygen reduction reaction,PEM FUEL-CELLS; ACTIVE-SITE; ELECTROCATALYTIC ACTIVITY; IRON PHTHALOCYANINE; CATHODE CATALYST; NITROGEN; EFFICIENT; GRAPHENE; PERFORMANCE; FE,Glycine;Doping source;Porous carbon;Non-precious metal catalyst;Oxygen reduction reaction;PEM FUEL-CELLS;ACTIVE-SITE;ELECTROCATALYTIC ACTIVITY;IRON PHTHALOCYANINE;CATHODE CATALYST;NITROGEN;EFFICIENT;GRAPHENE;PERFORMANCE;FE,kwpark@ssu.ac.kr,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0926-3373,,,,English,APPL CATAL B-ENVIRON,Article,WoS,Chemistry; Engineering,WOS:000400816200024,2-s2.0-85018642722,South Korea,ssu.ac.kr,Soongsil Univ,"Soongsil Univ, South Korea","Choi, In-Ae; Kwak, Da-Hee; Han, Sang-Beom; Park, Jin-Young; Park, Hyun-Seok; Ma, Kyeng-Bae; Kim, Do-Hyoung; Won, Ji-Eun; Park, Kyung-Won"
"Zhang, J., Bai, L., Jin, C., Xiao, M.Y., Liu, J.J.",Doping oxygen triggered electrocatalytic activity of carbon interpenetrating networks in acid electrolyte,2022,INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,47,80,,33999,34011,13,3,10.1016/j.ijhydene.2022.08.003,,"[Zhang, Jin; Bai, Lu; Jin, Chun; Xiao, Mingyue; Liu, Jingjun] Beijing Univ Chem Technol, Beijing Key Lab Electrochem Proc & Technol Mat, Beijing 100029, Peoples R China; [Liu, Jingjun] Beijing Univ Chem Technol, Beijing 100029, Peoples R China",,"The Fe-N-C catalysts may be promising candidates for replacing platinum group metal (PGM) catalysts to solve sluggish oxygen reduction reaction (ORR) kinetics in the proton exchange membrane fuel cells. However, the activity of Fe-N-C catalysts still has a certain gap compared with commercial Pt/C. Here, we provide a way to increase the intrinsic ac-tivity of Fe-N-C catalysts by designing active sites like ketone functional groups. A self-supporting interpenetrating network catalyst, composed of carbon nanotube (CNT) and carbon nanoparticle (CNP), is synthesized via multiple carbon sources (zinc-zeolitic imi-dazolate frameworks, polyaniline). The interpenetrating network features abundant ke-tone functional groups. The density functional theory (DFT) results prove that ketone groups can promote the ORR activity of FeN4 active sites. This offers a new idea for improving the activity of Fe-N-C catalysts co-doped by oxygen and nitrogen in acidic systems.(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.",Carbon; Composite; Active sites; Oxygen functional groups; Oxygen reduction reaction,REDUCTION REACTION ACTIVITY; FE-N-C; HIGHLY EFFICIENT; METAL ELECTROCATALYSTS; WORK FUNCTION; CATALYSTS; PERFORMANCE; ALKALINE; SITES; POLYANILINE,Carbon;Composite;Active sites;Oxygen functional groups;Oxygen reduction reaction;REDUCTION REACTION ACTIVITY;FE-N-C;HIGHLY EFFICIENT;METAL ELECTROCATALYSTS;WORK FUNCTION;CATALYSTS;PERFORMANCE;ALKALINE;SITES;POLYANILINE,liujingjun@mail.buct.edu.cn,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0360-3199,,,,English,INT J HYDROGEN ENERG,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels,WOS:000872789400008,2-s2.0-85137066521,China,mail.buct.edu.cn,Beijing Univ Chem Technol,"Beijing Univ Chem Technol, China","Zhang, Jin; Bai, Lu; Jin, Chun; Xiao, Mingyue; Liu, Jingjun"
"Yuan, L.J., Liu, B., Shen, L., Dai, Y., Li, Q., Liu, C., Gong, W., Sui, X., Wang, Z.",d-Orbital Electron Delocalization Realized by Axial Fe4C Atomic Clusters Delivers High-Performance Fe–N–C Catalysts for Oxygen Reduction Reaction,2023,Advanced Materials,35,39,2305945,,,,129,10.1002/adma.202305945,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85173164953&doi=10.1002%2Fadma.202305945&partnerID=40&md5=ed9abc4ff22805a7ad7f37a62e59239c,"Guangdong Research Center for Interfacial Engineering of Functional Materials, Shenzhen University, Shenzhen, Guangdong, China; MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China; College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, Hebei, China","Yuan, Longji, Guangdong Research Center for Interfacial Engineering of Functional Materials, Shenzhen University, Shenzhen, Guangdong, China; Liu, Bo, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China; Shen, Lixiao, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, Hebei, China; Dai, Yunkun, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China; Li, Qi, Guangdong Research Center for Interfacial Engineering of Functional Materials, Shenzhen University, Shenzhen, Guangdong, China; Liu, Chang, Guangdong Research Center for Interfacial Engineering of Functional Materials, Shenzhen University, Shenzhen, Guangdong, China; Gong, Wei, Guangdong Research Center for Interfacial Engineering of Functional Materials, Shenzhen University, Shenzhen, Guangdong, China; Sui, Xulei, Guangdong Research Center for Interfacial Engineering of Functional Materials, Shenzhen University, Shenzhen, Guangdong, China; Wang, Zhenbo, Guangdong Research Center for Interfacial Engineering of Functional Materials, Shenzhen University, Shenzhen, Guangdong, China, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China","Fe–N–C catalyst for oxygen reduction reaction (ORR) has been considered as the most promising nonprecious metal catalyst due to its comparable catalytic performance to Pt in proton exchange membrane fuel cells (PEMFCs). The active centers of Fe–pyrrolic N<inf>4</inf> have been proven to be extremely active for ORR. However, forming a stable Fe–pyrrolic N<inf>4</inf> structure is a huge challenge. Here, a Cyan-Fe–N–C catalyst with Fe–pyrrolic N<inf>4</inf> as the intrinsic active center is constructed with the help of axial Fe<inf>4</inf>C atomic clusters, which shows a half-wave potential of up to 0.836 V (vs. RHE) in the acid environment. More remarkably, it delivers a high power density of 870 and 478 mW cm−2 at 1.0 bar in H<inf>2</inf>–O<inf>2</inf> and H<inf>2</inf>–Air fuel cells, respectively. According to theoretical calculation and in situ spectroscopy, the axial Fe<inf>4</inf>C can provide strong electronic perturbation to Fe–N<inf>4</inf> active centers, leading to the d-orbital electron delocalization of Fe and forming the Fe–pyrrolic N<inf>4</inf> bond with high charge distribution, which stabilizes the Fe–pyrrolic N<inf>4</inf> structure and optimizes the OH* adsorption during the catalytic process. This work proposes a new strategy to adjust the electronic structure of single-atom catalysts based on the strong interaction between single atoms and atomic clusters. © 2023 Wiley-VCH GmbH.",atomic clusters; electron delocalization; Fe–N–C; interaction mechanism; oxygen reduction reaction,Atoms; Electrolytic reduction; Electronic structure; Iron compounds; Oxygen; Proton exchange membrane fuel cells (PEMFC); Active center; Atomic clusters; D orbitals; Electron delocalization; Fe–N–C; Interaction mechanisms; Orbital electrons; Oxygen reduction reaction; Pyrrolic; ]+ catalyst; Catalysts,atomic clusters;electron delocalization;Fe–N–C;interaction mechanism;oxygen reduction reaction;Atoms;Electrolytic reduction;Electronic structure;Iron compounds;Oxygen;Proton exchange membrane fuel cells (PEMFC);Active center;D orbitals;Interaction mechanisms;Orbital electrons;Pyrrolic;]+ catalyst;Catalysts,"X.-L. Sui; Shenzhen Key Laboratory of Special Functional Materials, Shenzhen Engineering Laboratory for Advance Technology of Ceramics, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China; email: suixulei@szu.edu.cn; Z.-B. Wang; Shenzhen Key Laboratory of Special Functional Materials, Shenzhen Engineering Laboratory for Advance Technology of Ceramics, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China; email: wangzhb@hit.edu.cn",,,,,,John Wiley and Sons Inc,09359648,,ADVME,37450565,English,Adv Mater,Article,Scopus,,2-s2.0-85173164953,,China,szu.edu.cn,,,"Yuan, L.-J.; Liu, B.; Shen, L.; Dai, Y.; Li, Q.; Liu, C.; Gong, W.; Sui, X.; Wang, Z."
"Yang, H., Wang, X., Wang, S., Zhang, P., Xiao, C., Maleki Kheimeh Sari, H., Liu, J., Jia, J., Cao, B., Qin, J., Xiao, W., Zhou, Z.Y., Li, X.",Double boosting single atom Fe–N4 sites for high efficiency O2 and CO2 electroreduction,2021,Carbon,182,,,109,116,,51,10.1016/j.carbon.2021.05.038,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85107578107&doi=10.1016%2Fj.carbon.2021.05.038&partnerID=40&md5=649234c4b716e5e2247aab74a4fcbf5b,"Institute of Advanced Electrochemical Energy, Xi'an University of Technology, Xi'an, Shaanxi, China; Shaanxi International Joint Research Center of Surface Technology for Energy Storage Materials, Xi'an, Shaanxi, China; School of Chemistry, Beihang University, Beijing, China; Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen, Fujian, China; College of Chemistry and Environmental Science, Inner Mongolia Normal University China, Hohhot, Nei Mongol, China","Yang, Huijuan, Institute of Advanced Electrochemical Energy, Xi'an University of Technology, Xi'an, Shaanxi, China, Shaanxi International Joint Research Center of Surface Technology for Energy Storage Materials, Xi'an, Shaanxi, China; Wang, Xingpu, School of Chemistry, Beihang University, Beijing, China; Wang, Shengbao, Institute of Advanced Electrochemical Energy, Xi'an University of Technology, Xi'an, Shaanxi, China, Shaanxi International Joint Research Center of Surface Technology for Energy Storage Materials, Xi'an, Shaanxi, China; Zhang, Pengyang, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen, Fujian, China; Xiao, Chi, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen, Fujian, China; Maleki Kheimeh Sari, Hirbod, Institute of Advanced Electrochemical Energy, Xi'an University of Technology, Xi'an, Shaanxi, China, Shaanxi International Joint Research Center of Surface Technology for Energy Storage Materials, Xi'an, Shaanxi, China; Liu, Jihu, Institute of Advanced Electrochemical Energy, Xi'an University of Technology, Xi'an, Shaanxi, China, Shaanxi International Joint Research Center of Surface Technology for Energy Storage Materials, Xi'an, Shaanxi, China; Jia, Jingchun, College of Chemistry and Environmental Science, Inner Mongolia Normal University China, Hohhot, Nei Mongol, China; Cao, Bin, Institute of Advanced Electrochemical Energy, Xi'an University of Technology, Xi'an, Shaanxi, China, Shaanxi International Joint Research Center of Surface Technology for Energy Storage Materials, Xi'an, Shaanxi, China; Qin, Jian, Institute of Advanced Electrochemical Energy, Xi'an University of Technology, Xi'an, Shaanxi, China, Shaanxi International Joint Research Center of Surface Technology for Energy Storage Materials, Xi'an, Shaanxi, China; Xiao, Wei, Institute of Advanced Electrochemical Energy, Xi'an University of Technology, Xi'an, Shaanxi, China, Shaanxi International Joint Research Center of Surface Technology for Energy Storage Materials, Xi'an, Shaanxi, China; Zhou, Zhiyou, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen, Fujian, China; Li, Xifei, Institute of Advanced Electrochemical Energy, Xi'an University of Technology, Xi'an, Shaanxi, China, Shaanxi International Joint Research Center of Surface Technology for Energy Storage Materials, Xi'an, Shaanxi, China","Metal-N<inf>4</inf> single-atom catalysts have emerged as the frontier of catalysis. However, the low metal loading and abundance of single atoms embedded in carbon skeleton hinder their practical application. Herein, we report an effective “trapping and exposing” strategy for constructing single-atom Fe–N<inf>4</inf> catalysts with high density of single-atom active sites. The strategy involves the strong binding of metal ions to sucrose (trapping) to prevent the migration and agglomeration of Fe3+, followed by the introduction of a mesoporous structure using an SBA-15 template to achieve sufficient exposure of the Fe–N<inf>4</inf> sites (exposing). The as-prepared catalyst comprises Fe–N<inf>4</inf> moieties (10.8 wt%) with a hierarchical structure. Density functional theory calculations reveal that the chelating reaction between sucrose and Fe3+ ions has a low free energy, resulting in the formation of highly dispersed Fe–N<inf>4</inf> single atoms. The single-atom catalyst displays a high peak power density of 0.784 W cm−2 in a H<inf>2</inf>–O<inf>2</inf> proton exchange membrane fuel cell and achieves an impressive CO current density of 109 A g−1 at negligible overpotentials in a flow cell. This work provides an efficient strategy for designing high-performance single-atom catalysts for practical electrocatalysis applications. © 2021 Elsevier Ltd",Electrocatalysts; Electrochemical CO2 reduction; Fe–N4; High active site density; O2 reduction reaction,Atoms; Binding sites; Catalyst activity; Density functional theory; Electrocatalysis; Electrocatalysts; Electrolytic reduction; Free energy; Iron compounds; Metal ions; Metals; Proton exchange membrane fuel cells (PEMFC); Sugar (sucrose); Electro reduction; Electrochemical CO2 reduction; Fe$+3+$; Fe–N4; High active site density; Higher efficiency; Metal abundances; O2 reduction reaction; Single-atoms; ]+ catalyst; Carbon dioxide,Electrocatalysts;Electrochemical CO2 reduction;Fe–N4;High active site density;O2 reduction reaction;Atoms;Binding sites;Catalyst activity;Density functional theory;Electrocatalysis;Electrolytic reduction;Free energy;Iron compounds;Metal ions;Metals;Proton exchange membrane fuel cells (PEMFC);Sugar (sucrose);Electro reduction;Fe$+3+$;Higher efficiency;Metal abundances;Single-atoms;]+ catalyst;Carbon dioxide,"X. Li; Institute of Advanced Electrochemical Energy, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, China; email: xfli@xaut.edu.cn; Z. Zhou; State Key Laboratory of Physical Chemistry of Solid Surfaces, Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China; email: zhouzy@xmu.edu.cn",,,,,,Elsevier Ltd,00086223,,CRBNA,,English,Carbon,Article,Scopus,,2-s2.0-85107578107,,China,xaut.edu.cn,,,"Yang, H.; Wang, X.; Wang, S.; Zhang, P.; Xiao, C.; Maleki Kheimeh Sari, H.; Liu, J.; Jia, J.; Cao, B.; Qin, J.; Xiao, W.; Zhou, Z.-Y.; Li, X."
"Brea, C., Hu, G.",Dual-Atom Catalysts for the Oxygen Reduction Reaction: Unraveling Atomic Structures under Reaction Conditions,2025,Journal of the American Chemical Society,147,22,,19210,19216,,5,10.1021/jacs.5c04776,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105005874800&doi=10.1021%2Fjacs.5c04776&partnerID=40&md5=07c3898aac27e626d208ac2848948dd2,"Department of Chemistry and Biochemistry, Queens College, City University of New York, Flushing, NY, United States; The Graduate Center, New York, NY, United States; College of Engineering, Atlanta, GA, United States; Georgia Institute of Technology, Atlanta, GA, United States","Brea, Courtney, Department of Chemistry and Biochemistry, Queens College, City University of New York, Flushing, NY, United States, The Graduate Center, New York, NY, United States; Hu, Guoxiang, College of Engineering, Atlanta, GA, United States, Georgia Institute of Technology, Atlanta, GA, United States","Metal-nitrogen-carbon (M-N-C, M = Mn, Fe, Co, Ni, Cu, Zn, and Pt) dual-atom catalysts (DACs) show great potential for the oxygen reduction reaction (ORR) at the cathode of proton exchange membrane fuel cells (PEMFCs). During catalytic reactions, multiple reactants and intermediates interact with the active sites, yet understanding their dynamic structural evolution under the operating conditions remains challenging. In this study, we analyze 186 heteronuclear FeM-N-C DACs using ab initio thermodynamic phase diagrams and find that OH-ligated structures become predominant at higher applied potentials. This indicates that catalytic activity is governed by electrochemically modified metal sites rather than by the bare structures. We further investigate the catalytic mechanism of these ligated structures and reveal that the ORR limiting potential can be efficiently predicted from the phase diagrams. Among the 186 DACs studied, 29 were found to outperform Pt-based catalysts, with FeCo-N-C DACs demonstrating the highest activity. Our computational predictions align well with experimental observations, highlighting the crucial role of dynamic structural changes under reaction conditions in enhancing the electrocatalytic performance of DACs. © 2025 The Authors. Published by American Chemical Society.",,Crystal atomic structure; Reaction intermediates; Active site; Catalytic reactions; Heteronuclear; Nitrogen-carbon; Operating condition; Oxygen reduction reaction; Proton-exchange membranes fuel cells; Reaction conditions; Structural evolution; ]+ catalyst; Electrolytic reduction; graphene; proton; water; carbon; oxygen; Article; catalyst; conjugation; crystal structure; dual atom catalyst; electrochemical analysis; electron; entropy; equilibrium constant; nonhuman; oxygen reduction; reduction (chemistry); simulation; solvation; thermodynamics; ab initio calculation; article; atom; catalysis; cathode electrode; controlled study; fuel; prediction,Crystal atomic structure;Reaction intermediates;Active site;Catalytic reactions;Heteronuclear;Nitrogen-carbon;Operating condition;Oxygen reduction reaction;Proton-exchange membranes fuel cells;Reaction conditions;Structural evolution;]+ catalyst;Electrolytic reduction;graphene;proton;water;carbon;oxygen;Article;catalyst;conjugation;crystal structure;dual atom catalyst;electrochemical analysis;electron;entropy;equilibrium constant;nonhuman;oxygen reduction;reduction (chemistry);simulation;solvation;thermodynamics;ab initio calculation;atom;catalysis;cathode electrode;controlled study;fuel;prediction,"G. Hu; School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, 30332, United States; email: emma.hu@mse.gatech.edu",,,,,,American Chemical Society,00027863,,JACSA,40407746,English,J. Am. Chem. Soc.,Article,Scopus,,2-s2.0-105005874800,,United States,mse.gatech.edu,,,"Brea, C.; Hu, G."
"Tao, J., Guan, X., Yang, X., Bai, J., Li, C., Liu, X., Shao, M., Xiao, M., Liu, C., Xing, W.",Dual-function synergy in boron-doped Fe-N-C: enhanced site density and intrinsic activity,2025,Chemical Science,16,39,,18152,18160,,0,10.1039/d5sc05135e,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105018116605&doi=10.1039%2Fd5sc05135e&partnerID=40&md5=f3a88e3d38c091c88c3b09eb4b3fcb05,"State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Energy Institute, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, Guangdong, China","Tao, Jinjing, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Guan, Xin, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Yang, Xiaolong, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Bai, Jingsen, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Li, Chuanfu, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Liu, Xiaohui, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Shao, Minhua, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Energy Institute, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, Guangdong, China; Xiao, Meiling, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Liu, Changpeng, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Xing, Wei, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China","Atomically dispersed transition metal, nitrogen co-doped carbon (M-N-C) is hailed as the most promising platinum alternative for the oxygen reduction reaction (ORR); however, its practical deployment is bottlenecked by inferior intrinsic activity and insufficient site density. Herein, we report a sodium borohydride (NaBH<inf>4</inf>) assisted synthesis strategy to achieve dual enhancement of active site density and intrinsic activity. This strategy endows a B-doped catalyst (denoted as Fe-sZ8-N-C) with a high active site density of 2.26 × 1020 sites per g, a two-fold enhancement over conventional Fe-N-C. Besides, the intrinsic activity of the catalyst is improved from 0.96 e per site per s to 1.5 e per site per s. Density functional theory (DFT) calculations reveal that the boron-modulated coordination structure switches the ORR pathway from associative OOH dissociation to direct O<inf>2</inf> cleavage while weakening intermediate adsorption strength, thereby boosting intrinsic activity. When assembled in practical PEMFC devices, the optimized Fe-sZ8-N-C catalyst delivers an exceptional peak power density of 1.3 W cm−2 under H<inf>2</inf>-O<inf>2</inf> conditions at 80 °C, demonstrating its potential for fuel cell applications. © 2025 The Royal Society of Chemistry.",,Boron; Catalyst activity; Density functional theory; Doping (additives); Electrolytic reduction; Iron compounds; Oxygen reduction reaction; Platinum; Active site density; Boron-doped; Co-doped; Doped carbons; Dual function; Intrinsic activities; Site density; Sodium borohydrides; ]+ catalyst; Sodium Borohydride,Boron;Catalyst activity;Density functional theory;Doping (additives);Electrolytic reduction;Iron compounds;Oxygen reduction reaction;Platinum;Active site density;Boron-doped;Co-doped;Doped carbons;Dual function;Intrinsic activities;Site density;Sodium borohydrides;]+ catalyst;Sodium Borohydride,"M. Xiao; State Key Laboratory of Electroanalytic Chemistry, Jilin Province Key Laboratory of Low Carbon Chemistry Power, Jilin Provincial Science and Technology Innovation Center of Hydrogen Energy, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: mlxiao@ciac.ac.cn; C. Liu; State Key Laboratory of Electroanalytic Chemistry, Jilin Province Key Laboratory of Low Carbon Chemistry Power, Jilin Provincial Science and Technology Innovation Center of Hydrogen Energy, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: liuchp@ciac.ac.cn; W. Xing; State Key Laboratory of Electroanalytic Chemistry, Jilin Province Key Laboratory of Low Carbon Chemistry Power, Jilin Provincial Science and Technology Innovation Center of Hydrogen Energy, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: xingwei@ciac.ac.cn",,,,,,Royal Society of Chemistry,20416520,,CSHCC,,English,Chem. Sci.,Article,Scopus,,2-s2.0-105018116605,,China;Hong Kong,ciac.ac.cn,,,"Tao, J.; Guan, X.; Yang, X.; Bai, J.; Li, C.; Liu, X.; Shao, M.; Xiao, M.; Liu, C.; Xing, W."
"Liu, S., Mamtaz, M.R.B., Jia, C., Lu, H., Wang, S., Meyer, Q., Zhao, C.",Dual Metal Fe–Mn–N–C Sites with Improved Stability for the Oxygen Reduction Reaction in Proton Exchange Membrane Fuel Cell,2025,Small Methods,9,8,2500116,,,,0,10.1002/smtd.202500116,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105002290208&doi=10.1002%2Fsmtd.202500116&partnerID=40&md5=a3cbd9e239b34dcff2263236e7d23d78,"School of Chemistry, UNSW Sydney, Sydney, NSW, Australia; School of Chemical Engineering, The University of Queensland, Brisbane, QLD, Australia","Liu, Shiyang, School of Chemistry, UNSW Sydney, Sydney, NSW, Australia; Mamtaz, Md Raziun Bin, School of Chemistry, UNSW Sydney, Sydney, NSW, Australia; Jia, Chen, School of Chemistry, UNSW Sydney, Sydney, NSW, Australia; Lu, Haijiao, School of Chemical Engineering, The University of Queensland, Brisbane, QLD, Australia; Wang, Shuhao, School of Chemistry, UNSW Sydney, Sydney, NSW, Australia; Meyer, Q., School of Chemistry, UNSW Sydney, Sydney, NSW, Australia; Zhao, Chuan, School of Chemistry, UNSW Sydney, Sydney, NSW, Australia","Low-cost and durable hydrogen fuel cells are crucial for the success of the hydrogen economy. While Fe–N–C catalysts are amongst the most promising low-cost alternative to platinum (Pt) for the oxygen reduction reaction, their unsatisfactory durability is the grand challenge faced by the field due to iron demetallation, carbon corrosion and electrode collapse. Herein, a dual-metal single-atom Fe–Mn–N–C catalyst with superior stability (49% loss in peak power density) than Fe–N–C catalysts (66% loss) over 96 h of continuous operations in H<inf>2</inf>–O<inf>2</inf> fuel cells is reported. Advanced operando electrochemical and post-mortem physical measurements shed light on the underlying mechanism. The iron–manganese bond anchors the iron strongly in the Fe–Mn–N–C centre, which lowers the hydrogen peroxide yield as a result. Operando electrochemical measurements reveal a more stable triple-phase boundary environment for the Fe–Mn–N–C catalyst than for Fe–N–C. Specifically, a combination of cyclic voltammetry and impedance spectroscopy with the distribution of relaxation times reveals that the iron demetallation and carbon corrosion are respectively 20% and 30% slower for the Fe–Mn–N–C catalyst than the Fe–N–C catalyst in hydrogen fuel cells. Altogether, this dual-metal site strategy paves the way for improving the stability of Pt-free catalysts for hydrogen fuel cells. © 2025 The Author(s). Small Methods published by Wiley-VCH GmbH.",dual-metal single-atom; Fe–Mn; hydrogen fuel cells; oxygen reduction reaction; platinum-free,Bioremediation; Electrochemical corrosion; Electrolytic reduction; Electron spin resonance spectroscopy; Hydrogen bonds; Hydrogen fuels; Hydrogen peroxide; Oxygen reduction reaction; Palladium; Platinum; Cell/B.E; Dual metals; Dual-metal single-atom; Fe–mn; Hydrogen fuel cells; Low-costs; Platinum-free; Single-atoms; ]+ catalyst; Cyclic voltammetry; carbon; hydrogen; hydrogen peroxide; iron; manganese; metal; oxygen; platinum; proton; article; atom; catalyst; controlled study; corrosion; cyclic voltammetry; electrode; fuel; impedance spectroscopy; membrane; relaxation time,dual-metal single-atom;Fe–Mn;hydrogen fuel cells;oxygen reduction reaction;platinum-free;Bioremediation;Electrochemical corrosion;Electrolytic reduction;Electron spin resonance spectroscopy;Hydrogen bonds;Hydrogen fuels;Hydrogen peroxide;Palladium;Platinum;Cell/B.E;Dual metals;Low-costs;Single-atoms;]+ catalyst;Cyclic voltammetry;carbon;hydrogen;iron;manganese;metal;oxygen;proton;article;atom;catalyst;controlled study;corrosion;electrode;fuel;impedance spectroscopy;membrane;relaxation time,"Q. Meyer; School of Chemistry, Faculty of Science, University of New South Wales, Sydney, 2052, Australia; email: q.meyer@unsw.edu.au; C. Zhao; School of Chemistry, Faculty of Science, University of New South Wales, Sydney, 2052, Australia; email: chuan.zhao@unsw.edu.au",,,,,,John Wiley and Sons Inc,,,,40207785,English,Small Methods,Article,Scopus,,2-s2.0-105002290208,,Australia,unsw.edu.au,,,"Liu, S.; Mamtaz, M.R.B.; Jia, C.; Lu, H.; Wang, S.; Meyer, Q.; Zhao, C."
"Chen, C.L., Sun, M.R., Wang, K.X., Li, Y.J.","Dual-metal single-atomic catalyst: The challenge in synthesis, characterization, and mechanistic investigation for electrocatalysis",2022,SMARTMAT,3,4,,533,564,32,112,10.1002/smm2.1085,,"[Chen, Changli; Sun, Mengru; Wang, Kaixuan; Li, Yujing] Beijing Inst Technol, Expt Ctr Adv Mat, Sch Mat Sci & Engn, Beijing Key Lab Construct Tailorable Adv Funct Mat, Beijing 100081, Peoples R China",,"Dual-metal single-atom catalysts (DACs), featuring high atomic utilization efficiency, excellent selectivity, and stability originating from the atomically dispersed nature, have emerged as a new frontier in heterogeneous electrocatalysis due to the synergistic effect between diversified metal active sites in promoting their catalytic activity. In this review, the recent progress and development on the syntheses, characterizations, theoretical uniqueness, and applications for various catalytic reactions and devices (oxygen reduction reaction, oxygen evolution reaction, hydrogen evolution reaction, CO2 reduction reaction, N-2 reduction reaction, proton exchange membrane fuel cells) are summarized and reviewed. Specifically, the synergistic effect between the two metal centers and electronic structures of catalysts is systematically discussed. Moreover, the future challenges and prospects in developing practical DACs are proposed as a possible direction for further investigation.",dual-metal single-atomic catalyst; electrocatalysis; proton exchange membrane fuel cells,OXYGEN REDUCTION REACTION; CO2 REDUCTION; ELECTROCHEMICAL REDUCTION; HYDROGEN EVOLUTION; LAYER DEPOSITION; CARBON-DIOXIDE; ACTIVE-SITES; BIFUNCTIONAL ELECTROCATALYSTS; NANOPOROUS GRAPHENE; ORGANIC FRAMEWORKS,dual-metal single-atomic catalyst;electrocatalysis;proton exchange membrane fuel cells;OXYGEN REDUCTION REACTION;CO2 REDUCTION;ELECTROCHEMICAL REDUCTION;HYDROGEN EVOLUTION;LAYER DEPOSITION;CARBON-DIOXIDE;ACTIVE-SITES;BIFUNCTIONAL ELECTROCATALYSTS;NANOPOROUS GRAPHENE;ORGANIC FRAMEWORKS,yjli@bit.edu.cn,,"111 RIVER ST, HOBOKEN 07030-5774, NJ USA",,,,WILEY,2766-8525,,,,English,SMARTMAT,Review,WoS,Chemistry; Materials Science,WOS:000901579700001,2-s2.0-85168443962,China,bit.edu.cn,Beijing Inst Technol,"Beijing Inst Technol, China","Chen, Changli; Sun, Mengru; Wang, Kaixuan; Li, Yujing"
"Dey, G., Jana, R., Saifi, S., Kumar, R., Bhattacharyya, D., Datta, A., Sinha, A.S.K., Aijaz, A.",Dual Single-Atomic Co-Mn Sites in Metal-Organic-Framework-Derived N-Doped Nanoporous Carbon for Electrochemical Oxygen Reduction,2023,ACS NANO,17,19,,19155,19167,13,57,10.1021/acsnano.3c05379,,"[Dey, Gargi; Saifi, Shadab; Aijaz, Arshad] Rajiv Gandhi Inst Petr Technol RGIPT Jais, Dept Sci & Humanities, Amethi 229304, Uttar Pradesh, India; [Jana, Rajkumar; Datta, Ayan] Indian Assoc Cultivat Sci IACS, Sch Chem Sci, Kolkata 700032, India; [Kumar, Ravi; Bhattacharyya, D.] Bhabha Atom Res Ctr, Atom & Mol Phys Div, Mumbai 400085, India; [Sinha, A. S. K.] Rajiv Gandhi Inst Petr Technol RGIPT Jais, Dept Chem Engn & Biochem Engn, Amethi 229304, Uttar Pradesh, India",,"Synthesizing dual single-atom catalysts (DSACs) with atomically isolated metal pairs is a challenging task but can be an effective way to enhance the performance for electrochemical oxygen reduction reaction (ORR). Herein, well-defined DSACs of Co-Mn, stabilized in N-doped porous carbon polyhedra (named CoMn/NC), are synthesized using high-temperature pyrolysis of a Co/Mn-doped zeolitic imidazolate framework. The atomically isolated Co-Mn site in CoMn/NC is recognized by combining microscopic as well as spectroscopic techniques. CoMn/NC exhibited excellent ORR activities in alkaline (E (1/2) = 0.89 V) as well as in acidic (E (1/2) = 0.82 V) electrolytes with long-term durability and enhanced methanol tolerance. Density functional theory (DFT) suggests that the Co-Mn site is efficiently activating the O-O bond via bridging adsorption, decisive for the 4e- oxygen reduction process. Though the Co-Mn sites favor O-2 activation via the dissociative ORR mechanism, stronger adsorption of the intermediates in the dissociative path degrades the overall ORR activity. Our DFT studies conclude that the ORR on an Co-Mn site mainly occurs via bridging side-on O-2 adsorption following thermodynamically and kinetically favorable associative mechanistic pathways with a lower overpotential and activation barrier. CoMn/NC performed excellently as a cathode in a proton exchange membrane (PEM) fuel cell and rechargeable Zn-air battery with high peak power densities of 970 and 176 mW cm(-2), respectively. This work provides the guidelines for the rational design and synthesis of nonprecious DSACs for enhancing the ORR activity as well as the robustness of DSACs and suggests a design of multifunctional robust electrocatalysts for energy storage and conversion devices.",MOF-derived nanostructured materials; dual single-atomcatalysts; oxygen reduction reaction; PEM fuel cell; Zn-air battery,ZINC-AIR BATTERIES; ELECTROCATALYSTS; CATALYSIS; FE; NANOPARTICLES; CHALLENGES; EFFICIENT; DESIGN; ALLOY,MOF-derived nanostructured materials;dual single-atomcatalysts;oxygen reduction reaction;PEM fuel cell;Zn-air battery;ZINC-AIR BATTERIES;ELECTROCATALYSTS;CATALYSIS;FE;NANOPARTICLES;CHALLENGES;EFFICIENT;DESIGN;ALLOY,spad@iacs.res.in; aaijaz@rgipt.ac.in,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1936-0851,,,37774140,English,ACS NANO,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science,WOS:001076037900001,2-s2.0-85173579055,India,iacs.res.in,Rajiv Gandhi Inst Petr Technol RGIPT Jais;Indian Assoc Cultivat Sci IACS;Bhabha Atom Res Ctr,"Rajiv Gandhi Inst Petr Technol RGIPT Jais, India;Indian Assoc Cultivat Sci IACS, India;Bhabha Atom Res Ctr, India","Dey, Gargi; Jana, Rajkumar; Saifi, Shadab; Kumar, Ravi; Bhattacharyya, D.; Datta, Ayan; Sinha, A. S. K.; Aijaz, Arshad"
"Liu, F., Zhang, X.Q., Zhang, X.L., Wang, L.L., Liu, M.M., Zhang, J.J.",Dual-template strategy for electrocatalyst of cobalt nanoparticles encapsulated in nitrogen-doped carbon nanotubes for oxygen reduction reaction,2021,JOURNAL OF COLLOID AND INTERFACE SCIENCE,581,,,523,532,10,27,10.1016/j.jcis.2020.07.008,,"[Liu, Fang; Zhang, Xinquan; Zhang, Xiaolong] Univ Shanghai Sci & Technol, Sch Mat Sci & Engn, Shanghai 200093, Peoples R China; [Zhang, Xinquan; Zhang, Xiaolong; Wang, Linlin; Liu, Minmin; Zhang, Jiujun] Shanghai Univ, Coll Sci, Inst Sustainable Energy, Shanghai 200444, Peoples R China",,"Development of non-precious metal catalysts (NPMCs) with high performance and stability has impor-tant value for oxygen reduction reaction (ORR) of fuel cells. In this paper, a novel structure of nitrogen-doped carbon nanotubes-encapsulated cobalt nanoparticles (Co@NCNTs) is synthesized by a simple dual-template strategy using silica colloid and tri-block copolymer (polyethylene oxide polypropylene oxide-polyethylene oxide, PEO-PPO-PEO, F127) as hard and soft templates, respectively. The Co@NCNTs-800 synthesized at 800 degrees C shows an excellent ORR performance, which can be attributed to the desirable combination of their unique one-dimensional carbon nanotube structure, the adequate nitrogen doping level, the large surface area created by the dual-template strategy, and the synergistic effect between graphitic carbon layer and cobalt nanoparticles. The doped N atoms can provide coordination sites for cobalt nanoparticles and form NAC moieties as dominant active sites, which provide positive effect on catalytic ORR activity. The graphitic carbon layers can protect cobalt nanoparticles against agglomeration and electrolyte corrosion, while cobalt nanoparticles can activate the bordering graphitic carbon layers and further increase ORR activities. This dual-template synthetic strategy provides an opportunity to promote the catalytic performance of NPMCs for application of polymer electrolyte membrane fuel cells. (C) 2020 Elsevier Inc. All rights reserved.",Dual-template; Nitrogen-doped; Carbon nanotubes; Cobalt nanoparticles; Oxygen reduction reaction; Polymer electrolyte membrane fuel cell,EFFICIENT BIFUNCTIONAL ELECTROCATALYST; GRAPHITIC LAYERS; EVOLUTION; CATALYSTS; ORR; NANOWIRES; CATHODE; FOAM; NANOCOMPOSITES; ALKALINE,Dual-template;Nitrogen-doped;Carbon nanotubes;Cobalt nanoparticles;Oxygen reduction reaction;Polymer electrolyte membrane fuel cell;EFFICIENT BIFUNCTIONAL ELECTROCATALYST;GRAPHITIC LAYERS;EVOLUTION;CATALYSTS;ORR;NANOWIRES;CATHODE;FOAM;NANOCOMPOSITES;ALKALINE,liumm@shu.edu.cn,,"525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA",,,,ACADEMIC PRESS INC ELSEVIER SCIENCE,0021-9797,,,32818675,English,J COLLOID INTERF SCI,Article,WoS,Chemistry,WOS:000591642300008,2-s2.0-85089436508,China,shu.edu.cn,Univ Shanghai Sci & Technol;Shanghai Univ,"Univ Shanghai Sci & Technol, China;Shanghai Univ, China","Liu, Fang; Zhang, Xinquan; Zhang, Xiaolong; Wang, Linlin; Liu, Minmin; Zhang, Jiujun"
"Osmieri, L., Cullen, D.A., Chung, H.T., Ahluwalia, R.K., Neyerlin, K.C.",Durability evaluation of a Fe–N–C catalyst in polymer electrolyte fuel cell environment via accelerated stress tests,2020,Nano Energy,78,,105209,,,,71,10.1016/j.nanoen.2020.105209,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85089423073&doi=10.1016%2Fj.nanoen.2020.105209&partnerID=40&md5=cb2d14e6af46bc350623bef58b0039ef,"National Renewable Energy Laboratory, Golden, CO, United States; Oak Ridge National Laboratory, Oak Ridge, TN, United States; Los Alamos National Laboratory, Los Alamos, NM, United States; Argonne National Laboratory, Lemont, IL, United States","Osmieri, Luigi, National Renewable Energy Laboratory, Golden, CO, United States; Cullen, David A., Oak Ridge National Laboratory, Oak Ridge, TN, United States; Chung, Hoon Taek, Los Alamos National Laboratory, Los Alamos, NM, United States; Ahluwalia, Rajesh K., Argonne National Laboratory, Lemont, IL, United States; Neyerlin, Kenneth C., National Renewable Energy Laboratory, Golden, CO, United States","An “atomically-dispersed” iron-nitrogen-carbon (Fe–N–C) catalyst was used to provide a systematic comparison of platinum group metal (PGM)-free electrocatalyst degradation as a function of accelerated stress tests (ASTs) in an acidic polymer electrolyte fuel cell (PEFC). It was determined that the majority of catalyst degradation was caused by cell operation in presence of O<inf>2</inf>. In contrast, potential cycling of the Fe–N–C-containing cathode under inert atmosphere over typical PEFC cathode operation from 0.95 to 0.6 V had little to no effect. The increase in kinetic overpotential is shown to be the major source of the PEFC performance decrease during the ASTs. These results continue to showcase the need for development of robust PGM-free electrocatalysts in concert with improved electrochemical performance. © 2020",Accelerated stress test; Active sites loss; Durability; Kinetic overpotential; PGM-Free catalyst,Cathodes; Durability; Electrocatalysts; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Accelerated stress; Catalyst degradation; Cathode operations; Durability evaluation; Electrochemical performance; Inert atmospheres; Platinum group metals; Polymer electrolyte fuel cells; Polyelectrolytes,Accelerated stress test;Active sites loss;Durability;Kinetic overpotential;PGM-Free catalyst;Cathodes;Electrocatalysts;Proton exchange membrane fuel cells (PEMFC);Solid electrolytes;Accelerated stress;Catalyst degradation;Cathode operations;Durability evaluation;Electrochemical performance;Inert atmospheres;Platinum group metals;Polymer electrolyte fuel cells;Polyelectrolytes,"K.C. Neyerlin; National Renewable Energy Laboratory, Golden, 80401, United States; email: kenneth.neyerlin@nrel.gov",,,,,,Elsevier Ltd,22112855,,,,English,Nano Energy,Article,Scopus,,2-s2.0-85089423073,,United States,nrel.gov,,,"Osmieri, L.; Cullen, D.A.; Chung, H.T.; Ahluwalia, R.K.; Neyerlin, K.C."
"Bisello, A., Baricci, A., Casalegno, A., Odgaard, M., Serov, A., Atanassov, P.",DURABILITY ISSUES IN PRECIOUS-GROUP-METAL FREE PEMFC CATHODES,2017,,,,,163,164,,0,,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85173567114&partnerID=40&md5=6c73eb67d1c18b17948d40b3e2d3a25b,"Politecnico di Milano, Milan, MI, Italy; EWII Fuel Cells A/S, Odense, Denmark; Center for Micro-Engineered Materials, University of New Mexico School of Engineering, Albuquerque, NM, United States","Bisello, A., Politecnico di Milano, Milan, MI, Italy; Baricci, Andrea, Politecnico di Milano, Milan, MI, Italy; Casalegno, Andrea, Politecnico di Milano, Milan, MI, Italy; Odgaard, Madeleine, EWII Fuel Cells A/S, Odense, Denmark; Serov, Alexey Alexandrovich, Center for Micro-Engineered Materials, University of New Mexico School of Engineering, Albuquerque, NM, United States; Atanassov, Plamen B., Center for Micro-Engineered Materials, University of New Mexico School of Engineering, Albuquerque, NM, United States","Replacement of noble metal catalysts used in oxygen reduction reaction (ORR) is a research goal in the proton membrane fuel cells. In this work, mass transport limiting phenomena in Fe-N-C catalyst layers are studied. A specific methodology, that combines in-situ characterization of performance and modelling activity, is adopted to elucidate the contribution of electronic/ionic transport losses in catalyst layer with controlled properties. CCL impedance spectra, which take into account ORR activation and electron, proton, and oxygen transport losses are simulated. Analysis shows that a regime of mixed ion and electron transport limitations describes correctly the main features of impedance spectra. Degradation is negligible under nitrogen at 0.6V, supporting catalysts materials oxidation or water formation as main reasons for performance loss. © EFC 2017 - Proceedings of the 7th European Fuel Cell Piero Lunghi Conference.",Electrochemical impedance spectroscopy; Mass transport limitations; Non platinum group metal catalysts; PEMFC model,Catalysts; Electrolytic reduction; Electron transport properties; Iron compounds; Oxygen; Platinum; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Catalysts layers; Electrochemical-impedance spectroscopies; Mass transport limitation; Metal catalyst; Non platinum group metal catalyst; Non-platinum; Oxygen reduction reaction; P.E.M.F.C; PEMFC model; Platinum group metals; Electrochemical impedance spectroscopy,Electrochemical impedance spectroscopy;Mass transport limitations;Non platinum group metal catalysts;PEMFC model;Catalysts;Electrolytic reduction;Electron transport properties;Iron compounds;Oxygen;Platinum;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Catalysts layers;Electrochemical-impedance spectroscopies;Mass transport limitation;Metal catalyst;Non platinum group metal catalyst;Non-platinum;Oxygen reduction reaction;P.E.M.F.C;Platinum group metals,; ; ,"Cigolotti, V.; Barchiesi, C.; Chianella, M.",,"7th European Fuel Cell Piero Lunghi Conference, EFC 2017",Naples,2017-12-12 through 2017-12-15,ENEA,,9788882863241,,,English,EFC - Proc. Eur. Fuel Cell Piero Lunghi Conf.,Conference paper,Scopus,,2-s2.0-85173567114,,Italy;Denmark;United States,No email,,,"Bisello, A.; Baricci, A.; Casalegno, A.; Odgaard, M.; Serov, A.; Atanassov, P."
"Ding, S., Ning, K., Yuan, B., Pasa, W., Yin, S., Liu, J.",Durability of Fe-N/C Catalysts with Different Nanostructures for Electrochemical Oxygen Reduction in Alkaline Solution; 碱性溶液中不同微观结构的Fe-N/C催化剂氧还原性能的稳定性对比研究,2020,Wuji Cailiao Xuebao/Journal of Inorganic Materials,35,8,,953,958,,3,10.15541/jim20190547,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85090388463&doi=10.15541%2Fjim20190547&partnerID=40&md5=37d010cafb258e39eb0e7c20aee535ef,"College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, Shanghai, China; Key Laboratory of Clean Power Generation and Environmental Protection Technology in Mechanical Industry, Shanghai, Shanghai, China; Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials, Nanning, Guangxi, China","Ding, Sheng, College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, Shanghai, China; Ning, Kai, College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, Shanghai, China; Yuan, Bingxia, College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, Shanghai, China; Pasa, André Avelino, College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, Shanghai, China, Key Laboratory of Clean Power Generation and Environmental Protection Technology in Mechanical Industry, Shanghai, Shanghai, China; Yin, Shibin, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials, Nanning, Guangxi, China; Liu, Jianfeng, College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, Shanghai, China, Key Laboratory of Clean Power Generation and Environmental Protection Technology in Mechanical Industry, Shanghai, Shanghai, China, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials, Nanning, Guangxi, China","The mechanism of Fe-N/C catalysts in oxygen reduction reactions is critical to the development of efficient, sustainable non-noble metal catalysts in polymer electrolyte membrane fuel cells, but it is still in controversy. In order to understand the relationship between composition and the nanostructure of material and the electro¬chemical activity, this study developed a type of Fe-N/C catalyst with high electrochemical activity, which contained Fe-N<inf>x</inf> active sites and Fe/Fe<inf>3</inf>C nanocrystals encapsulated with nitrogen-doped carbon nanotubes. Despite being free of precious metals, the as-prepared catalyst displays high oxygen reduction reactions (ORR) activity in alkaline medium with the half-wave po¬tential of 0.86 V(vs RHE), the mass activity of 18.84 A/g at 0.77 V(vs RHE), and the maximum current density of -4.3 mA•cm-2. Meanwhile, the electron transfer number is 3.7 at 0.2 V(vs RHE), revealing that the 4-electron ORR reaction exists in the catalyst. The excellent electrochemical activity is attributed to the graphene-encapsulated metallic Fe/Fe<inf>3</inf>C nanocrystals which improves the conductivity after the growth of N-doped carbon nanotubes, and the relatively high proportion of Fe-N<inf>x</inf> active sites distributed on the surface of Fe/Fe<inf>3</inf>C nanoparticles. This study provides a certain reference and basis for the further study of non-noble metal catalyst and their wide application in commercial production. © 2020, Science Press. All right reserved.",Catalyst; Electrochemistry; Nanomaterial; Oxygen reduction reaction,Alkalinity; Carbon nanotubes; Doping (additives); Electrolytic reduction; Iron compounds; Nanocrystals; Oxygen; Oxygen reduction reaction; Polyelectrolytes; Precious metals; Proton exchange membrane fuel cells (PEMFC); Alkaline solutions; Chemical activities; Commercial productions; Electrochemical activities; Electrochemical oxygen reduction; Maximum current density; Nitrogen doped carbon nanotubes; Non-noble metal catalysts; Catalyst activity,Catalyst;Electrochemistry;Nanomaterial;Oxygen reduction reaction;Alkalinity;Carbon nanotubes;Doping (additives);Electrolytic reduction;Iron compounds;Nanocrystals;Oxygen;Polyelectrolytes;Precious metals;Proton exchange membrane fuel cells (PEMFC);Alkaline solutions;Chemical activities;Commercial productions;Electrochemical activities;Electrochemical oxygen reduction;Maximum current density;Nitrogen doped carbon nanotubes;Non-noble metal catalysts;Catalyst activity,"J. Liu; College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, China; email: janice.liujianfeng@gmail.com",,,,,,Science Press wangjing@neigae.ac.cn,1000324X,,WCXUE,,English,Wuji Cailiao Xuebao,Article,Scopus,,2-s2.0-85090388463,,China,gmail.com,,,"Ding, S.; Ning, K.; Yuan, B.; Pasa, W.; Yin, S.; Liu, J."
"Na, G., Hwang, W., Shin, H., Park, S., Park, J.E., Lee, J., Shin, Y., Choi, H., Shim, J., Yeom, K., Sung, Y.E.",Durable and Active Nitrogen-Coordinated Iron Single-Atom Catalyst for Proton Exchange Membrane Fuel Cells Through Carbon Encapsulation,2024,ADVANCED ENERGY MATERIALS,14,30,,,,9,15,10.1002/aenm.202400565,,"[Na, Geumbi; Hwang, Wonchan; Shin, Heejong; Park, Subin; Lee, Jongmin; Shin, Yoojin; Choi, Hosung; Shim, Jaehyuk; Yeom, Kyungbeen; Sung, Yung-Eun] Inst Basic Sci IBS, Ctr Nanoparticle Res, Seoul 08826, South Korea; [Na, Geumbi; Hwang, Wonchan; Shin, Heejong; Park, Subin; Lee, Jongmin; Shin, Yoojin; Choi, Hosung; Shim, Jaehyuk; Yeom, Kyungbeen; Sung, Yung-Eun] Seoul Natl Univ, Inst Chem Proc, Sch Chem & Biol Engn, Seoul 08826, South Korea; [Park, Ji Eun] Tech Univ Korea, Grad Sch Knowledge Based Technol & Energy, Shihung 15703, South Korea",,"Significant advancements in the activity of nitrogen-coordinated iron single-atom catalysts (Fe-N-C) have attracted attention as potential alternatives to Pt-based cathodes in proton exchange membrane fuel cells. However, their limited stability in acidic environments hinders their practical application. Moreover, achieving a synchronous enhancement of both the activity and stability of the Fe sites while preventing demetallation or carbon corrosion remains a formidable challenge. Herein, a synthesis method for Fe-N-C is introduced that exhibits remarkable durability, featuring a protective carbon encapsulation formed by applying an additional heterocyclic organic compound coating. It is demonstrated that stability can be enhanced by converting edge-rich Fe sites into highly stable FeN4 moieties through precise control of the robustness and packing density of the carbon encapsulation. Furthermore, electrochemical redox behavior along with in situ spectroscopies and online differential electrochemical mass spectrometry provide insights into the structural characteristics of each Fe site and their stabilities. The accelerated stress testing and a long-term test (>100 h) exhibit that the robust carbon encapsulation can successfully prevent corrosion of carbon support and ensure durable Fe sites during operation.",carbon encapsulation; electrochemical stability; nitrogen-coordinated iron single-atom catalysts; oxygen reduction reaction; proton exchange membrane fuel cells,OXYGEN REDUCTION; ELECTRODE PERFORMANCE; SITES; ELECTROCATALYST,carbon encapsulation;electrochemical stability;nitrogen-coordinated iron single-atom catalysts;oxygen reduction reaction;proton exchange membrane fuel cells;OXYGEN REDUCTION;ELECTRODE PERFORMANCE;SITES;ELECTROCATALYST,ysung@snu.ac.kr,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1614-6832,,,,English,ADV ENERGY MATER,Article,WoS,Chemistry; Energy & Fuels; Materials Science; Physics,WOS:001222211500001,2-s2.0-85192828923,South Korea,snu.ac.kr,Inst Basic Sci IBS;Seoul Natl Univ;Tech Univ Korea,"Inst Basic Sci IBS, South Korea;Seoul Natl Univ, South Korea;Tech Univ Korea, South Korea","Na, Geumbi; Hwang, Wonchan; Shin, Heejong; Park, Subin; Park, Ji Eun; Lee, Jongmin; Shin, Yoojin; Choi, Hosung; Shim, Jaehyuk; Yeom, Kyungbeen; Sung, Yung-Eun"
"Xiao, F., Xu, G.L., Sun, C.J., Hwang, I., Xu, M.J., Wu, H.W., Wei, Z.D., Pan, X.Q., Amine, K., Shao, M.H.",Durable hybrid electrocatalysts for proton exchange membrane fuel cells,2020,NANO ENERGY,77,,105192,,,8,33,10.1016/j.nanoen.2020.105192,,"[Xiao, Fei; Wu, Hsi-wen; Shao, Minhua] Hong Kong Univ Sci & Technol, Dept Chem & Biol Engn, Kowloon, Clear Water Bay, Hong Kong, Peoples R China; [Xu, Gui-Liang; Sun, Cheng-Jun; Hwang, Inhui; Amine, Khalil] Argonne Natl Lab, Chem Sci & Engn Div, 9700 South Cass Ave, Lemont, IL 60439 USA; [Hwang, Inhui] Jeonbuk Natl Univ, Dept Phys Educ, Jeonju 54896, South Korea; [Hwang, Inhui] Jeonbuk Natl Univ, Inst Fus Sci, Jeonju 54896, South Korea; [Xu, Mingjie; Shao, Minhua] Hong Kong Univ Sci & Technol, Fok Ying Tung Res Inst, Guangzhou 511458, Peoples R China; [Xu, Mingjie; Pan, Xiaoqing] Univ Calif Irvine, Dept Chem Engn & Mat Sci, Irvine, CA 92697 USA; [Wei, Zidong] Chongqing Univ, Coll Chem & Chem Engn, Chongqing 400044, Peoples R China; [Shao, Minhua] Hong Kong Univ Sci & Technol, Energy Inst, Kowloon, Clear Water Bay, Hong Kong, Peoples R China; [Amine, Khalil] Stanford Univ, Mat Sci & Engn, Stanford, CA 94305 USA; [Amine, Khalil] Imam Abdulrahman Bin Faisal Univ IAU, IRMC, Dammam 34212, Saudi Arabia",,"The low durability of carbon-based non-precious metal electrocatalysts hinders their practical applications in proton exchange membrane fuel cells (PEMFCs). In this study, we rationally design a hybrid Pt-Fe-N-C electrocatalyst with unprecedented durability. It consists of abundant Pt and Fe single atoms homogeneously dispersed on the nitrogen-doped carbon support and a small amount of Pt-Fe alloy nanoparticles. A PEMFC with Pt-Fe-N-C as the cathode shows a larger peak power density (0.75 W cm(-2)) than that with Fe-N-C as the cathode (0.50 W cm(-2)). The remarkable durability of Pt-Fe-N-C is reflected from no noticeable drop in the half-wave potential after 70000 potential cycles between 0.6 and 1.0 V in the liquid cell, and 80% current retention after 85 h of potential hold at 0.4 V in the fuel cell. This work demonstrates the feasibility of improving the durability of Fe-N-C material via ultra-low Pt doping and makes non-precious metal electrocatalysts be close to achieving commercial metrics.",Single-atom catalyst; Oxygen reduction reaction; Durability; Proton exchange membrane fuel cells,OXYGEN REDUCTION REACTION; METAL-ORGANIC FRAMEWORKS; N-C CATALYSTS; SINGLE-ATOM; IRON; PERFORMANCE; ELECTROLYTE; DURABILITY; CARBON; IDENTIFICATION,Single-atom catalyst;Oxygen reduction reaction;Durability;Proton exchange membrane fuel cells;METAL-ORGANIC FRAMEWORKS;N-C CATALYSTS;SINGLE-ATOM;IRON;PERFORMANCE;ELECTROLYTE;CARBON;IDENTIFICATION,amine@anl.gov; kemshao@ust.hk,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2211-2855,,,,English,NANO ENERGY,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000581738300076,2-s2.0-85088919322,China;United States;South Korea;Saudi Arabia,anl.gov,Hong Kong Univ Sci & Technol;Argonne Natl Lab;Jeonbuk Natl Univ;Univ Calif Irvine;Chongqing Univ;Stanford Univ;Imam Abdulrahman Bin Faisal Univ IAU,"Hong Kong Univ Sci & Technol, China;Argonne Natl Lab, United States;Jeonbuk Natl Univ, South Korea;Univ Calif Irvine, United States;Chongqing Univ, China;Stanford Univ, United States;Imam Abdulrahman Bin Faisal Univ IAU, Saudi Arabia","Xiao, Fei; Xu, Gui-Liang; Sun, Cheng-Jun; Hwang, Inhui; Xu, Mingjie; Wu, Hsi-wen; Wei, Zidong; Pan, Xiaoqing; Amine, Khalil; Shao, Minhua"
"Xie, C., Chen, W., Wang, Y.Y., Yang, Y.H., Wang, S.Y.","Dynamic evolution processes in electrocatalysis: structure evolution, characterization and regulation",2024,CHEMICAL SOCIETY REVIEWS,53,22,,10852,10877,26,62,10.1039/d3cs00756a,,"[Xie, Chao; Yang, Yahui] Hunan Normal Univ, Coll Chem & Chem Engn, Changsha 410081, Peoples R China; [Chen, Wei; Wang, Yanyong; Wang, Shuangyin] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Prov Hunan Key Lab Graphene Mat & Devices, Changsha 410082, Peoples R China; [Xie, Chao] Hunan Normal Univ, Inst Interdisciplinary Studies, Changsha 410081, Peoples R China",,"Reactions on electrocatalytic interfaces often involve multiple processes, including the diffusion, adsorption, and conversion of reaction species and the interaction between reactants and electrocatalysts. Generally, these processes are constantly changing rather than being in a steady state. Recently, dynamic evolution processes on electrocatalytic interfaces have attracted increasing attention owing to their significant roles in catalytic reaction kinetics. In this review, we aim to provide insights into the dynamic evolution processes in electrocatalysis to emphasize the importance of unsteady-state processes in electrocatalysis. Specifically, the dynamic structure evolution of electrocatalysts, methods for the characterization of the dynamic evolution and the strategies for the regulation of the dynamic evolution for improving electrocatalytic performance are summarized. Finally, the conclusion and outlook on the research on dynamic evolution processes in electrocatalysis are presented. It is hoped that this review will provide a deeper understanding of dynamic evolution in electrocatalysis, and studies of electrocatalytic reaction processes and kinetics on the unsteady-state microscopic spatial and temporal scales will be given more attention. Dynamic evolution processes in electrocatalysis, including structure evolution of electrocatalysts, characterization methods and regulation strategies for dynamic evolution in electrocatalysis.",,PEM FUEL-CELL; SINGLE-ATOM CATALYSTS; OXYGEN REDUCTION; CORE-SHELL; ELECTROCHEMICAL REDUCTION; RAMAN-SPECTROSCOPY; WATER OXIDATION; CO2 REDUCTION; SURFACE; COPPER,PEM FUEL-CELL;SINGLE-ATOM CATALYSTS;OXYGEN REDUCTION;CORE-SHELL;ELECTROCHEMICAL REDUCTION;RAMAN-SPECTROSCOPY;WATER OXIDATION;CO2 REDUCTION;SURFACE;COPPER,xc9229@outlook.com; yangyahui2002@sina.com; shuangyinwang@hnu.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,0306-0012,,,39382539,English,CHEM SOC REV,Review,WoS,Chemistry,WOS:001328903000001,,China,outlook.com,Hunan Normal Univ;Hunan Univ,"Hunan Normal Univ, China;Hunan Univ, China","Xie, Chao; Chen, Wei; Wang, Yanyong; Yang, Yahui; Wang, Shuangyin"
"Miao, Z.P., Li, S.Z., Priest, C., Wang, T.Y., Wu, G., Li, Q.",Effective Approaches for Designing Stable M-Nx/C Oxygen-Reduction Catalysts for Proton-Exchange-Membrane Fuel Cells,2022,ADVANCED MATERIALS,34,52,2200595,,,20,83,10.1002/adma.202200595,,"[Miao, Zhengpei; Li, Shenzhou; Wang, Tanyuan; Li, Qing] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China; [Miao, Zhengpei] Hainan Univ, Sch Mat Sci & Engn, State Key Lab Marine Resource Utilizat South Chin, Haikou 570228, Hainan, Peoples R China; [Priest, Cameron; Wu, Gang] SUNY Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA",,"The large-scale commercialization of proton-exchange-membrane fuel cells (PEMFCs) is extremely limited by their costly platinum-group metals (PGMs) catalysts, which are used for catalyzing the sluggish oxygen reduction reaction (ORR) kinetics at the cathode. Among the reported PGM-free catalysts so far, metal-nitrogen-carbon (M-N-x/C) catalysts hold a great potential to replace PGMs catalysts for the ORR due to their excellent initial activity and low cost. However, despite tremendous progress in this field in the past decade, their further applications are restricted by fast degradation under practical conditions. Herein, the theoretical fundamentals of the stability of the M-N-x/C catalysts are first introduced in terms of thermodynamics and kinetics. The primary degradation mechanisms of M-N-x/C catalysts and the corresponding mitigating strategies are discussed in detail. Finally, the current challenges and the prospects for designing highly stable M-N-x/C catalysts are outlined.",degradation mechanisms; M-N; (x); C catalysts; oxygen reduction reaction; proton-exchange-membrane fuel cells; stability,DENSITY-FUNCTIONAL THEORY; NITROGEN-DOPED CARBON; DUAL-METAL SITES; ACTIVE-SITES; FE/N/C-CATALYSTS; C CATALYSTS; CORROSION-RESISTANCE; CATHODE CATALYSTS; PYRIDINE-LIKE; STABILITY,degradation mechanisms;M-N;(x);C catalysts;oxygen reduction reaction;proton-exchange-membrane fuel cells;stability;DENSITY-FUNCTIONAL THEORY;NITROGEN-DOPED CARBON;DUAL-METAL SITES;ACTIVE-SITES;FE/N/C-CATALYSTS;CORROSION-RESISTANCE;CATHODE CATALYSTS;PYRIDINE-LIKE,qing_li@hust.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,0935-9648,,,35338536,English,ADV MATER,Review,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000815608300001,2-s2.0-85132566584,China;United States,hust.edu.cn,Huazhong Univ Sci & Technol;Hainan Univ;SUNY Buffalo,"Huazhong Univ Sci & Technol, China;Hainan Univ, China;SUNY Buffalo, United States","Miao, Zhengpei; Li, Shenzhou; Priest, Cameron; Wang, Tanyuan; Wu, Gang; Li, Qing"
"Lee, C., Uhm, Y.R., Sun, G.M., Choi-Yim, H.",Effect of Acidic Washing Treatment for Fe-N/C Catalyst Synthesized Using E-beam Irradiation,2023,JOURNAL OF THE KOREAN MAGNETICS SOCIETY,33,3,,110,113,4,1,10.4283/JKMS.2023.33.3.110,,"[Lee, Chaewon; Uhm, Young Rang; Sun, Gwang-Min] Korea Atom Energy Res Inst KAERI, HANARO Utilizat Div, Daejeon 34057, South Korea; [Lee, Chaewon; Choi-Yim, Haein] Sookmyung Womens Univ, Dept Appl Phys, Seoul 04310, South Korea",,"Fe-N/C electrocatalysts was synthesized using electron beam (e-beam) irradiation to improve the oxygen reduction reaction activity in the polymer electrolyte membrane fuel cells. After synthesizing, the characteristics of catalyst before and after acid washing treatment were measured in the rotating disk electrode (RDE). It was confirmed that the catalyst was successfully synthesized measured using TEM, XRD, and Mossbauer spectroscopy. However, the formation of some impurities, such as oxides, were also confirmed. The electrochemical properties during oxygen reduction reaction (ORR) was enhanced after the acidic washing treatment of the catalyst.",Mossbauer spectroscopy; E-beam irradiation synthesis; Fe-N; C catalyst; oxygen reduction reaction (ORR),FUEL-CELL; IRON,Mossbauer spectroscopy;E-beam irradiation synthesis;Fe-N;C catalyst;oxygen reduction reaction (ORR);FUEL-CELL;IRON,uyrang@kaeri.re.kr,,"KOREA SCIENCES & TECHNOL CTR, RM 905, YEOKSAM-DONG 635-4, KANGNAM-KU, SEOUL, 135-703, SOUTH KOREA",,,,KOREAN MAGNETICS SOC,1598-5385,,,,English,J KOREAN MAGN SOC,Article,WoS,Physics,WOS:001044603000005,,South Korea,kaeri.re.kr,Korea Atom Energy Res Inst KAERI;Sookmyung Womens Univ,"Korea Atom Energy Res Inst KAERI, South Korea;Sookmyung Womens Univ, South Korea","Lee, Chaewon; Uhm, Young Rang; Sun, Gwang-Min; Choi-Yim, Haein"
"Zhang, Q., Zhu, T., Qing, X., Qiao, J., Sun, S.",Effect of acid-leaching on carbon-supported copper phthalocyanine tetrasulfonic acid tetrasodium salt (CuTSPc/C) for oxygen reduction reaction in alkaline electrolyte: Active site studies,2015,RSC Advances,5,62,,50344,50352,,12,10.1039/c5ra06314k,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84935920200&doi=10.1039%2Fc5ra06314k&partnerID=40&md5=dd2dba3836478a7a534ad379d0a71b6d,"Key Laboratory of Green Chemical Media and Reactions, Henan Normal University, Xinxiang, Henan, China; College of Environmental Science and Engineering, Donghua University, Shanghai, Shanghai, China; Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada","Zhang, Qing, Key Laboratory of Green Chemical Media and Reactions, Henan Normal University, Xinxiang, Henan, China; Zhu, Taishan, College of Environmental Science and Engineering, Donghua University, Shanghai, Shanghai, China; Qing, Xin, College of Environmental Science and Engineering, Donghua University, Shanghai, Shanghai, China; Qiao, Jinli, Key Laboratory of Green Chemical Media and Reactions, Henan Normal University, Xinxiang, Henan, China, College of Environmental Science and Engineering, Donghua University, Shanghai, Shanghai, China; Sun, Shuhui, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada","Although non-precious metal catalysts (NPMCs) have been extensively studied as low-cost catalyst alternatives to Pt, in particular for the oxygen reduction reaction (ORR) in polymer electrolyte membrane fuel cells (PEMFCs), the nature of the active ORR catalytic sites is still a subject of controversy. In this work, using carbon-supported copper phthalocyanine tetrasulfonic acid tetrasodium salt (CuTSPc/C) nanoparticles as the target catalyst, the effects of the transition metal Cu on the ORR active sites are systematically studied using both rotating disk electrode (RDE) and rotating ring disk electrode (RRDE) techniques in alkaline electrolyte. The results show that acid-leaching can significantly decrease the ORR activity of the CuTSPc/C catalyst, with the half-wave potential negatively shifted by more than 50 mV compared to the catalyst before acid-leaching. The electron transfer number of the ORR process catalyzed by the catalyst before acid-leaching remained at about 3.85 over the whole tested potential range from -0.6 to -0.1 V, while this number greatly decreased from 3.82 at -0.55 V to 3.53 at -0.1 V after acid-leaching. The H<inf>2</inf>O<inf>2</inf> produced accordingly increased sharply from 7.8% to 22%. XRD and TEM results indicate that acid-leaching is an effective method to remove metal-Cu. XPS analysis reveals that metal-Cu is essential in the ORR active site structure, and also plays a key part in the stabilization of the active N and S species. © The Royal Society of Chemistry 2015.",,Carbon; Catalyst activity; Catalysts; Copper; Electrodes; Electrolytes; Electrolytic reduction; Field effect transistors; Fuel cells; Leaching; Metal nanoparticles; Metals; Nitrogen compounds; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Rotating disks; Transition metal compounds; Transition metals; Active site structure; Alkaline electrolytes; Copper phthalocyanine tetrasulfonic acid; Non-precious metal catalysts; Oxygen reduction reaction; Polymer electrolyte membrane fuel cell (PEMFCs); Rotating disk electrodes; Rotating ring-disk electrode techniques; Solid electrolytes,Carbon;Catalyst activity;Catalysts;Copper;Electrodes;Electrolytes;Electrolytic reduction;Field effect transistors;Fuel cells;Leaching;Metal nanoparticles;Metals;Nitrogen compounds;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Rotating disks;Transition metal compounds;Transition metals;Active site structure;Alkaline electrolytes;Copper phthalocyanine tetrasulfonic acid;Non-precious metal catalysts;Oxygen reduction reaction;Polymer electrolyte membrane fuel cell (PEMFCs);Rotating disk electrodes;Rotating ring-disk electrode techniques;Solid electrolytes,,,,,,,Royal Society of Chemistry,,,RSCAC,,English,RSC Adv.,Article,Scopus,,2-s2.0-84935920200,,China;Canada,No email,,,"Zhang, Q.; Zhu, T.; Qing, X.; Qiao, J.; Sun, S."
"Unsal, S., Schmidt, T.J., Herranz, J.",Effect of aggregate size and film quality on the electrochemical properties of non-noble metal catalysts in rotating ring disk electrode measurements,2023,Electrochimica Acta,445,,142024,,,,11,10.1016/j.electacta.2023.142024,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85148320464&doi=10.1016%2Fj.electacta.2023.142024&partnerID=40&md5=2c00168ced2be1a4b0468fb6e9554297,"Electrochemistry Laboratory, Paul Scherrer Institut, Villigen, AG, Switzerland; Laboratory of Physical Chemistry, ETH Zürich, Zurich, ZH, Switzerland","Ünsal, Seçil, Electrochemistry Laboratory, Paul Scherrer Institut, Villigen, AG, Switzerland; Schmidt, Thomas J., Electrochemistry Laboratory, Paul Scherrer Institut, Villigen, AG, Switzerland, Laboratory of Physical Chemistry, ETH Zürich, Zurich, ZH, Switzerland; Herranz, Juan, Electrochemistry Laboratory, Paul Scherrer Institut, Villigen, AG, Switzerland","Non-noble metal catalysts (NNMCs) are promising candidates to replace the high-cost Pt-based catalysts required to catalyze the oxygen reduction reaction (ORR) in the cathode of proton exchange membrane fuel cells (PEMFCs), and their electrochemical properties (i.e., ORR-activity and H<inf>2</inf>O vs. H<inf>2</inf>O<inf>2</inf> selectivity) are commonly studied using rotating ring disk electrode (RRDE) measurements. However, such RRDE measurements are often performed using high NNMC-loadings that can lead to underestimated H<inf>2</inf>O<inf>2</inf>-yields. These effects can be curtailed by using lower loadings entailing the preparation of thin films whose homogeneity reportedly impacts the RRDE-results observed for Pt-based catalyst, but of unknown effects in the NNMC field. To shed light on this matter, in this study we investigated the effect of film thickness and quality on the electrochemical behavior of three NNMCs featuring different aggregate sizes ranging from ≈ 5 μm to ≈ 100 nm. The RRDE-results displayed a significant enhancement in the ORR limiting current of the NNMC with a smaller particle size that we tied to its improved mass transport properties. Moreover, improving the thin film quality led to a ≈ 2-fold enhancement of the H<inf>2</inf>O<inf>2</inf>-yield (vs. a similarly loaded, yet non-homogeneous NNMC-film) that demonstrates the importance of this parameter for the ORR-selectivity trends inferred from these RRDE measurements. © 2023 The Authors",Fuel cell; Hydrogen peroxide; Oxygen reduction reaction; Platinum group metal free catalysts; Single atom catalysts,Aggregates; Electrochemical electrodes; Electrochemical properties; Electrolytic reduction; Film preparation; Oxygen; Particle size; Platinum; Proton exchange membrane fuel cells (PEMFC); Rotating disks; Thin films; Aggregate size; Metal-free catalysts; Non-noble metal catalysts; Oxygen reduction reaction; Platinum group metal free catalyst; Platinum group metals; Rotating ring-disc electrode; Single atom catalyst; Single-atoms; ]+ catalyst; Catalysts,Fuel cell;Hydrogen peroxide;Oxygen reduction reaction;Platinum group metal free catalysts;Single atom catalysts;Aggregates;Electrochemical electrodes;Electrochemical properties;Electrolytic reduction;Film preparation;Oxygen;Particle size;Platinum;Proton exchange membrane fuel cells (PEMFC);Rotating disks;Thin films;Aggregate size;Metal-free catalysts;Non-noble metal catalysts;Platinum group metal free catalyst;Platinum group metals;Rotating ring-disc electrode;Single atom catalyst;Single-atoms;]+ catalyst;Catalysts,"J. Herranz; Electrochemistry Laboratory, Paul Scherrer Institut, Villigen, 5232, Switzerland; email: juan.herranz@psi.ch",,,,,,Elsevier Ltd,00134686,,ELCAA,,English,Electrochim Acta,Article,Scopus,,2-s2.0-85148320464,,Switzerland,psi.ch,,,"Unsal, S.; Schmidt, T.J.; Herranz, J."
"Fruehwald, H.M., Zenkina, O.V., Easton, E.B.",Effect of carbon support on Fe-N3/C model active site for the oxygen reduction reaction,2019,ECS Transactions,92,8,,523,532,,2,10.1149/09208.0523ecst,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85077499145&doi=10.1149%2F09208.0523ecst&partnerID=40&md5=10dfecbb4744c99590b25239cd19b12b,"Electrochemical Materials Lab, Ontario Tech University, Oshawa, ON, Canada","Fruehwald, Holly M., Electrochemical Materials Lab, Ontario Tech University, Oshawa, ON, Canada; Zenkina, Olena V., Electrochemical Materials Lab, Ontario Tech University, Oshawa, ON, Canada; Easton, E. Bradley, Electrochemical Materials Lab, Ontario Tech University, Oshawa, ON, Canada","We report on an investigation of the role carbon support has on a model non-precious metal catalyst for the oxygen reduction reaction (ORR) prepared through molecularly defined terpyridine moiety covalently embedded into high surface area carbon support (Black Pearls 2000) is reported. A terpyridine modified catalyst was previously prepared and allowed for the controlled deposition of one specific and unique N3/C active site on the surface of the support. The effect of changing the porosity of the carbon was analyzed for its oxygen reduction activity and characterized using thermogravimetric analysis, pore size determination, and rotating disk measurements. This system showed that by using a more microporous support, the activity for the oxygen reduction reaction decreased due to different active sites forming on the high surface area support. © The Electrochemical Society.",,Carbon; Catalyst activity; Electrolytic cells; Oxygen; Oxygen reduction reaction; Polyelectrolytes; Pore size; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Thermogravimetric analysis; Carbon support; Controlled deposition; Effect of carbons; High surface area; Microporous support; Modified catalysts; Non-precious metal catalysts; Oxygen Reduction; Electrolytic reduction,Carbon;Catalyst activity;Electrolytic cells;Oxygen;Oxygen reduction reaction;Polyelectrolytes;Pore size;Proton exchange membrane fuel cells (PEMFC);Solid electrolytes;Thermogravimetric analysis;Carbon support;Controlled deposition;Effect of carbons;High surface area;Microporous support;Modified catalysts;Non-precious metal catalysts;Oxygen Reduction;Electrolytic reduction,,"Swider-Lyons, K.; Uchida, H.; Buechi, F.; Mustain, W.E.; Pivovar, B.S.; Pintauro, P.N.; Weber, A.Z.; Jones, D.; Gasteiger, H.; Rice, C.A.; Strasser, P.; Kjeang, E.; Shinohara, K.; Mitsushima, S.; Kim, Y.-T.; Schmidt, T.J.; Fenton, J.M.; Mantz, R.A.; Lakshmanan, B.; Xu, H.",,"Symposium on Polymer Electrolyte Fuel Cells and Electrolyzers 19, PEFC and E 2019 - 236th ECS Meeting",Atlanta,2019-10-13 through 2019-10-17,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-85077499145,,Canada,No email,,,"Fruehwald, H.M.; Zenkina, O.V.; Easton, E.B."
"Zhang, X.Y., Liu, Q.T., Shui, J.L.",Effect of Catalyst Layer Hydrophobicity on Fe-N-C Proton Exchange Membrane Fuel Cells,2020,CHEMELECTROCHEM,7,7,,1775,1780,6,20,10.1002/celc.202000351,,"[Zhang, Xinyue; Liu, Qingtao; Shui, Jianglan] Beihang Univ, Sch Mat Sci & Engn, 37 Xueyuan Rd, Beijing 100083, Peoples R China",,"The hydrophobicity of the cathode catalyst layer (CCL) affects the performance of the proton exchange membrane fuel cell (PEMFC) by adjusting the water management of the catalyst layer, which has been extensively studied in Pt-based catalysts. Here, the effect of the hydrophobicity of Fe-N-C CCL on the performance of the PEMFC is investigated. The hydrophobicity of the Fe-N-C CCL is tuned by polytetrafluoroethylene (PTFE) by using three addition methods: 1) coat PTFE on Fe-N-C powder and heat-treat; 2) mix PTFE emulsion with Fe-N-C ink and then brush the electrode; and 3) transfer a ground PTFE/Fe-N-C composite film onto the gas diffusion layer by the decal method. For each PTFE addition method, the optimized PTFE amount can increase the power density of Fe-C-N PEMFC by 15.1 %, 26.6 %, and 87.2 %, respectively. At the same time, it is found that enhanced hydrophobicity reduces the initial current decay rate of the Fe-N-C CCLs, but their residual current densities are close after a 50 h durability test at 0.5 V in a H-2-O-2 PEMFC. It can be concluded that the hydrophobicity of the Fe-N-C CLL has a great influence on the power density of the fuel cell, but the influence on the long-term durability of the fuel cell is negligible.",PEMFC; Fe-N-C; catalyst layers; hydrophobicity; durability,OXYGEN REDUCTION REACTION; METAL-ORGANIC-FRAMEWORK; ACTIVE-SITES; PERFORMANCE; CATHODE; PEMFC; ELECTROCATALYSTS; CARBON; DURABILITY; STABILITY,PEMFC;Fe-N-C;catalyst layers;hydrophobicity;durability;OXYGEN REDUCTION REACTION;METAL-ORGANIC-FRAMEWORK;ACTIVE-SITES;PERFORMANCE;CATHODE;ELECTROCATALYSTS;CARBON;STABILITY,shuijianglan@buaa.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,2196-0216,,,,English,CHEMELECTROCHEM,Article,WoS,Electrochemistry,WOS:000525948800034,,China,buaa.edu.cn,Beihang Univ,"Beihang Univ, China","Zhang, Xinyue; Liu, Qingtao; Shui, Jianglan"
"Byeon, A., Lee, K.J., Lee, M.J., Lee, J.S., Lee, I.H., Park, H.Y., Lee, S.Y., Yoo, S.J., Jang, J.H., Kim, H.J., Kim, J.Y.",Effect of Catalyst Pore Size on the Performance of Non-Precious Fe/N/C-Based Electrocatalysts for High-Temperature Polymer Electrolyte Membrane Fuel Cells,2018,CHEMELECTROCHEM,5,14,,1805,1810,6,27,10.1002/celc.201800093,,"[Byeon, Ayeong; Lee, Kyung Jin; Lee, Min Jae; Lee, Ju Sung; Lee, In Hyuk; Park, Hee-Young; Lee, So Young; Yoo, Sung Jong; Jang, Jong Hyun; Kim, Hyoung-Juhn; Kim, Jin Young] Korea Inst Sci & Technol, Fuel Cell Res Ctr, Seoul 136791, South Korea; [Jang, Jong Hyun; Kim, Jin Young] Korea Univ, Green Sch, Seoul 02841, South Korea; [Yoo, Sung Jong; Jang, Jong Hyun; Kim, Hyoung-Juhn; Kim, Jin Young] Univ Sci & Technol, Daejeon 305355, South Korea",,"Owing to the high cost of technologies utilizing the oxygen reduction reaction (ORR) in fuel cell applications, considerable efforts have been recently made to develop non-precious metal electrocatalysts for the commercialization of the low-temperature polymer electrolyte membrane fuel cells (LT-PEMFCs). By extension, non-precious-metal electrocatalysts can be a cost-effective solution for the commercialization of high-temperature PEMFCs (HT-PEMFCs). However, no previous reports have been published regarding the applicability. Herein, we demonstrate that a hierarchical mesoporous iron and nitrogen co-doped carbon (Fe/N/C) electrocatalyst is able to efficiently electrocatalyze the ORR in a phosphoric acid electrolyte with a half-wave potential of 0.72 V (only 170 mV deviation from conventional Pt/C) and high selectivity (electron-transfer number > 3.95) with a mild overpotential. Furthermore, we fabricated HT-PEMFC devices on the basis of hierarchical mesoporous Fe/N/C electrocatalysts and non-aqueous electrolytes, which exhibited a high performance, over 20 mW/cm (2). Besides, the optimal hierarchical porosity of the mesoporous Fe/N/C catalyst contributes to its high ORR activity. It is considered that it provides a large surface area for electrocatalytic ORR, and improves the proton and oxygen transport properties.",HT-PEMFC; non-precious metal catalysts; oxygen reduction reaction; oxygen transport resistance; proton transport resistance,OXYGEN REDUCTION REACTION; CATHODE CATALYST; ACTIVE-SITES; IRON; POLYBENZIMIDAZOLE; NANOSPHERES; PEMFC; LEVEL,HT-PEMFC;non-precious metal catalysts;oxygen reduction reaction;oxygen transport resistance;proton transport resistance;CATHODE CATALYST;ACTIVE-SITES;IRON;POLYBENZIMIDAZOLE;NANOSPHERES;PEMFC;LEVEL,jinykim@kist.re.kr,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,2196-0216,,,,English,CHEMELECTROCHEM,Article,WoS,Electrochemistry,WOS:000438339200006,2-s2.0-85047436048,South Korea,kist.re.kr,Korea Inst Sci & Technol;Korea Univ;Univ Sci & Technol,"Korea Inst Sci & Technol, South Korea;Korea Univ, South Korea;Univ Sci & Technol, South Korea","Byeon, Ayeong; Lee, Kyung Jin; Lee, Min Jae; Lee, Ju Sung; Lee, In Hyuk; Park, Hee-Young; Lee, So Young; Yoo, Sung Jong; Jang, Jong Hyun; Kim, Hyoung-Juhn; Kim, Jin Young"
"Wang, Q.X., Cui, Y., Li, Y.Q., Lu, S.F., Xiang, Y.",Effect of Controllable Pyrolysis of Ionomers in Fe-N-C Cathode Catalytic Layer on Cell Performance and Stability of Membrane Electrode Assembly,2023,ACTA CHIMICA SINICA,81,10,,1350,1356,7,2,10.6023/A23040167,,"[Wang, Qingxin; Cui, Yong; Li, Yunqi; Lu, Shanfu; Xiang, Yan] Beihang Univ, Beijing Key Lab Bioinspired Energy Mat & Devices, Sch Energy & Power Engn, Beijing 100191, Peoples R China",,"Non-precious metal M-N-C catalysts have a low density of active sites, which requires increasing the catalyst loading amount per unit area to obtain sufficient active sites to ensure the required apparent output current of the proton exchange membrane fuel cells (PEMFCs). This inevitably increases the thickness of the catalytic layer. On the one hand, a thick catalytic layer increases the resistance to material transfer, and on the other hand, a thick catalytic layer is more prone to causing ""flooding"" problems, which further worsens the material transfer problem of the catalytic layer. To address the water flooding and material transfer efficiency challenges of Fe-N-C cathode catalytic layers, this study employed controlled pyrolysis of perfluorinated sulfonic acid ionomer side chains with hydrophilic sulfonic acid groups within the catalytic layer. The in-situ modulation of the hydrophilic-hydrophobic balance at the active sites of the catalyst creates an efficient three-phase interface, enabling high ion conductivity and efficient water and oxygen transport within the Fe-N-C catalytic layer. Consequently, the output performance and stability of the membrane electrode are significantly improved. The results demonstrate that the degree of sulfonic acid group pyrolysis within the catalytic layer ionomer can be effectively controlled by adjusting the pyrolysis temperature and duration. Using a catalytic layer with an ionomer to Fe-N-C catalyst mass ratio (I/C) of 0.5 as a model, the perfluorinated sulfonic acid ionomer's sulfonic acid group decomposition rate was 16.3% after 40 minutes of heat treatment at 250. under a N2 atmosphere, resulting in an increased hydrophobicity of the catalytic layer surface, as indicated by a surface water contact angle increasing from 113 degrees to 134 degrees while maintaining high ion conductivity. The corresponding membrane electrode exhibited optimal output performance, with a peak power density of 359.7 mW.cm(-2), representing a 38% improvement over the pre-treatment electrode. Additionally, under a constant voltage of 0.4 V, the material transfer resistance of the heat-treated catalytic layer decreased by 29.8% to 242.48 m Omega.cm(2) compared to the pre-treatment condition. During the 20-hour constant voltage discharge test at 0.4 V, the heat-treated Fe-N-C catalytic layer exhibited higher discharge current density than the untreated membrane electrode. This study demonstrates that partially controlled pyrolysis of catalytic layer ionomer is an effective method for improving the performance and stability of M-N-C non-precious metal catalyst membrane electrode fuel cells.",proton exchange membrane fuel cells (PEMFCs); non-precious metal catalyst layers; teat treatment; flooding; perfluorosulfonic acid ionomer,OXYGEN REDUCTION REACTION; ACTIVE-SITES,proton exchange membrane fuel cells (PEMFCs);non-precious metal catalyst layers;teat treatment;flooding;perfluorosulfonic acid ionomer;OXYGEN REDUCTION REACTION;ACTIVE-SITES,yunqi_li@buaa.edu.cn; lusf@buaa.edu.cn,,"16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA",,,,SCIENCE PRESS,0567-7351,,,,Chinese,ACTA CHIM SINICA,Article,WoS,Chemistry,WOS:001095595900011,2-s2.0-85175821542,China,buaa.edu.cn,Beihang Univ,"Beihang Univ, China","Wang, Qingxin; Cui, Yong; Li, Yunqi; Lu, Shanfu; Xiang, Yan"
"Khandavalli, S., Iyer, R., Park, J.H., Myers, D.J., Neyerlin, K.C., Ulsh, M., Mauger, S.A.",Effect of Dispersion Medium Composition and Ionomer Concentration on the Microstructure and Rheology of Fe-N-C Platinum Group Metal-free Catalyst Inks for Polymer Electrolyte Membrane Fuel Cells,2020,Langmuir,36,41,,12247,12260,,43,10.1021/acs.langmuir.0c02015,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85093877999&doi=10.1021%2Facs.langmuir.0c02015&partnerID=40&md5=d3e65a9d03516b8ac06bf70ec8d578f8,"Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO, United States; Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States","Khandavalli, Sunilkumar, Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO, United States; Iyer, Radhika, Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO, United States; Park, Jaehyung, Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Myers, Deborah J., Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Neyerlin, Kenneth C., Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO, United States; Ulsh, Michael J., Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO, United States; Mauger, Scott A., Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO, United States","We present an investigation of the microstructure and rheological behavior of catalyst inks consisting of Fe-N-C platinum group metal-free catalysts and a perfluorosulfonic acid ionomer in a dispersion medium (DM) of water and 1-propanol (nPA). The effects of the ionomer-to-catalyst (I/C) ratio and weight percentage of water (H2O %) in the DM on the ink microstructure were studied. Steady-shear and dynamic-oscillatory-shear rheology, in combination with synchrotron X-ray scattering, was utilized to understand interparticle interactions and the level of agglomeration of the inks. In the absence of the ionomer, the inks were significantly agglomerated, approaching a gel-like microstructure for catalyst concentrations as low as 2 wt %. The effect of H2O % in the DM on particle agglomeration was found to vary with particle concentration. In concentrated inks (≥2 wt % catalyst), increasing H2O % was found to increase agglomeration because of the hydrophobic nature of the catalysts. In dilute inks (<1 wt % catalyst), the trend was reversed with increasing H2O %, suggesting that electrostatic interactions are dominating the behavior. In inks with 5 wt % catalyst, the addition of an ionomer was found to significantly stabilize the catalyst against agglomeration. Maximum stability was observed at 0.35 I/C for all DM H2O % studied. At high ionomer concentrations (I/C > 0.35), interesting differences were observed between nPA-rich inks (H2O % ≤ 50%) and H2O-rich (82% H2O) inks. The nPA-rich inks remained predominantly stable - ink viscosity only weakly increased with I/C and the Newtonian behavior was maintained for I/C up to 0.9. In contrast, the H2O-rich inks exhibited a significant increase in viscoelasticity with increasing I/C, suggesting flocculation of the catalyst by the ionomer. These differences suggest that the nature of the interactions between the ionomer and catalyst is highly dependent on the H2O % in the DM. ©",,Agglomeration; Association reactions; Catalysts; Dispersions; Elasticity; Ionomers; Microstructure; Platinum; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); X ray scattering; Catalyst concentration; Inter-particle interaction; Oscillatory shear rheology; Particle agglomerations; Particle concentrations; Perfluorosulfonic acid ionomers; Platinum group metals; Synchrotron X-ray scattering; Iron compounds,Agglomeration;Association reactions;Catalysts;Dispersions;Elasticity;Ionomers;Microstructure;Platinum;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);X ray scattering;Catalyst concentration;Inter-particle interaction;Oscillatory shear rheology;Particle agglomerations;Particle concentrations;Perfluorosulfonic acid ionomers;Platinum group metals;Synchrotron X-ray scattering;Iron compounds,"S.A. Mauger; Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, 80401, United States; email: scott.mauger@nrel.gov",,,,,,American Chemical Society,07437463,,LANGD,32970944,English,Langmuir,Article,Scopus,,2-s2.0-85093877999,,United States,nrel.gov,,,"Khandavalli, S.; Iyer, R.; Park, J.H.; Myers, D.J.; Neyerlin, K.C.; Ulsh, M.; Mauger, S.A."
"Schonvogel, D., Nagappan, N.K., Muller-Hulstede, J., Bengen, N., Wagner, P.",Effect of Fe-N-Cs as Catalytic Active Support for Platinum towards ORR in Acidic Environment,2023,Journal of the Electrochemical Society,170,11,114518,,,,1,10.1149/1945-7111/ad09f4,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85177778122&doi=10.1149%2F1945-7111%2Fad09f4&partnerID=40&md5=023e419a618884b039a3aa84d03a43a1,"Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany","Schonvogel, Dana, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany; Nagappan, Nambi Krishnan, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany; Müller-Hülstede, Julia, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany; Bengen, Nina, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany; Wagner, Peter, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany","Metal-nitrogen-carbon (M-N-C) compounds such as Fe-N-Cs are currently the most promising platinum group metal free catalysts for oxygen reduction in acidic environment. Regarding the overriding goal of reducing PEMFC production costs by reducing the platinum content, the use of Fe-N-Cs as catalytic active support for low Pt amounts is investigated in this study. Activity and stability of Pt in different contents on a commercial Fe-N-C is compared to Pt on a typical carbon black. Pt nanoparticles are well-distributed on both support substrate classes. Although the electrochemical surface and mass activity of Pt is lower on Fe-N-C compared to carbon black, the Fe-N-C has a contribution to total ORR activity depending on the Pt/Fe-N-C ratio, which is quantified. In the low Pt content case of 1 wt%, the ORR activity is increased by factor of two in presence of Fe-N-C. This boosting effect on ORR activity is important for future strategies to lower the Pt content in PEMFCs. © 2023 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.",,Carbon black; Electrolytic reduction; Iron compounds; Platinum; Acidic environment; Active supports; Carbon compounds; Metal-free catalysts; Nitrogen-carbon; Oxygen Reduction; P.E.M.F.C; Platinum group metals; Production cost; Pt nanoparticles; Proton exchange membrane fuel cells (PEMFC),Carbon black;Electrolytic reduction;Iron compounds;Platinum;Acidic environment;Active supports;Carbon compounds;Metal-free catalysts;Nitrogen-carbon;Oxygen Reduction;P.E.M.F.C;Platinum group metals;Production cost;Pt nanoparticles;Proton exchange membrane fuel cells (PEMFC),"D. Schonvogel; German Aerospace Center (DLR), Institute of Engineering Thermodynamics, Oldenburg, 26129, Germany; email: dana.schonvogel@dlr.de",,,,,,Institute of Physics,00134651,,JESOA,,English,J Electrochem Soc,Article,Scopus,,2-s2.0-85177778122,,Germany,dlr.de,,,"Schonvogel, D.; Nagappan, N.K.; Muller-Hulstede, J.; Bengen, N.; Wagner, P."
"Li, R., Li, X., Liu, Q., Yue, H., Meng, Y., Tian, Y.",Effect of Fe–N–C single atom/cluster catalyst on ORR of PEMFC,2025,International Journal of Hydrogen Energy,139,,,718,729,,4,10.1016/j.ijhydene.2025.05.294,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105005945179&doi=10.1016%2Fj.ijhydene.2025.05.294&partnerID=40&md5=cc15b7a904935bf17be3086b46321ebe,"Jiangsu University, Zhenjiang, Jiangsu, China; Jiangsu University, Zhenjiang, Jiangsu, China; Ltd. (CST), Shaoxing, China; College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xinyang, Shaanxi, China","Li, Ruina, Jiangsu University, Zhenjiang, Jiangsu, China, Ltd. (CST), Shaoxing, China; Li, Xuwen, Jiangsu University, Zhenjiang, Jiangsu, China; Liu, Qingcheng, Jiangsu University, Zhenjiang, Jiangsu, China; Yue, Hua, Ltd. (CST), Shaoxing, China; Meng, Yang, Ltd. (CST), Shaoxing, China; Tian, Yuanyuan, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xinyang, Shaanxi, China","With the continuous advancement of fuel cell technology, the exploration and development of highly efficient non - precious - metal catalysts for the oxygen reduction reaction (ORR) have emerged as a focal point of research. Fe–N–C catalysts have attracted much attention due to their excellent performance and low cost, and coupling single-atom catalysts (SACs) with atomic clusters (ACs) is an effective method to improve catalyst activity. This study used the pyrolysis method to synthesize iron atom catalysts (Fe–N–C SACs) and iron cluster coupled catalysts (Fe–N–C SACs/ACs) on ZIF-8 carbon support. It evaluated the catalyst performance through electrochemical testing. The experimental results showed that the introduction of Fe clusters improved the half-wave potential of the catalyst to 0.399 V, which represented an 8.2 % enhancement compared to the SAC catalyst and reached 87.1 % of that of the commercial Pt–C catalyst, and reduced the Tafel slope to 61.47 mV dec−1, effectively improving the ORR activity of the catalyst. We constructed FeN<inf>4</inf> single atom catalyst models and FeN<inf>4</inf>/Fe<inf>4</inf>N<inf>6</inf> single atom cluster catalyst models using density functional theory (DFT), analyzed their electronic structures and reaction mechanisms, and revealed the mechanism of action of iron clusters. DFT calculations showed that iron clusters altered the charge distribution of FeN<inf>4</inf> sites, reducing the rate determining step (RDS) (OH desorption) energy to 0.5 eV, which promoted the desorption of products and the re-adsorption of reactants. As a result, the superior electrocatalytic performance of Fe–N–C SAC/AC is attributed to the synergistic effect between iron clusters and single atoms, which is influenced by the coordination environment and provides new ideas for designing efficient ORR catalysts. © 2025 Hydrogen Energy Publications LLC",Cluster metal catalysts; Density functional theory; Fe–N–C; Fuel cell; Oxygen reduction reaction,Pyrolysis; Atomic clusters; Cluster metal; Cluster metal catalyst; Density-functional-theory; Fe–N–C; Iron cluster; Metal catalyst; Oxygen reduction reaction; Single-atoms; ]+ catalyst; Electrolytic reduction,Cluster metal catalysts;Density functional theory;Fe–N–C;Fuel cell;Oxygen reduction reaction;Pyrolysis;Atomic clusters;Cluster metal;Cluster metal catalyst;Density-functional-theory;Iron cluster;Metal catalyst;Single-atoms;]+ catalyst;Electrolytic reduction,"R. Li; School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China; email: liruina@ujs.edu.cn",,,,,,Elsevier Ltd,03603199,0080311393,IJHED,,English,Int J Hydrogen Energy,Article,Scopus,,2-s2.0-105005945179,,China,ujs.edu.cn,,,"Li, R.; Li, X.; Liu, Q.; Yue, H.; Meng, Y.; Tian, Y."
"Morozan, A., Sougrati, M.T., Goellner, V., Jones, D., Stievano, L., Jaouen, F.",Effect of Furfuryl Alcohol on Metal Organic Framework-based Fe/N/C Electrocatalysts for Polymer Electrolyte Membrane Fuel Cells,2014,ELECTROCHIMICA ACTA,119,,,192,205,14,69,10.1016/j.electacta.2013.12.022,,"[Morozan, Adina; Sougrati, Moulay Tahar; Goellner, Vincent; Jones, Deborah; Stievano, Lorenzo; Jaouen, Frederic] Univ Montpellier 2, Inst Charles Gerhardt Montpellier, UMR CNRS 5253, F-34095 Montpellier 5, France",,"Fe/N/C electrocatalysts for the oxygen reduction reaction (ORR) in polymer electrolyte membrane fuel cells (PEMFCs) have been synthesized from iron acetate ((FeAc)-Ac-II), 1,10-phenanthroline (phen), furfuryl alcohol (FA) and a thermally-decomposable metal-organic framework (MOF). The catalyst precursors have been prepared according to two main synthesis schemes. In the first one, a nitrogen-doped carbon was first synthesized from the MOF impregnated with FA, and this carbon was subsequently used as a microporous support for (FeAc)-Ac-II and phen. In the second approach, the FA-impregnated MOF was used as a support for (FeAc)-Ac-II and phen. The catalyst precursors prepared from these two approaches were subjected to a first pyrolysis in Ar and to a second pyrolysis in NH3. The effect of the pyrolysis temperature in Ar and heating rate were investigated. The as-prepared electrocatalysts were characterized by transmission electron microscopy, N-2 sorption analysis, as well as Mossbauer and X-ray absorption spectroscopies for the optimized catalysts. The electrochemical properties towards the ORR were investigated by rotating-disk electrode voltammetry and H-2-O-2 PEMFC tests. (C) 2013 Elsevier Ltd. All rights reserved.",Electrocatalyst; Metal-Organic Frameworks; Oxygen Reduction Reaction; Mossbauer spectroscopy; X-ray absorption spectroscopy,OXYGEN REDUCTION CATALYST; HIGH-SURFACE-AREA; ZEOLITIC IMIDAZOLATE FRAMEWORK; HIERARCHICALLY POROUS CARBON; HYDROGEN STORAGE CAPACITY; CATHODE CATALYSTS; IRON PHTHALOCYANINES; HEAT-TREATMENT; O-2 REDUCTION; ACTIVE-SITES,Electrocatalyst;Metal-Organic Frameworks;Oxygen Reduction Reaction;Mossbauer spectroscopy;X-ray absorption spectroscopy;OXYGEN REDUCTION CATALYST;HIGH-SURFACE-AREA;ZEOLITIC IMIDAZOLATE FRAMEWORK;HIERARCHICALLY POROUS CARBON;HYDROGEN STORAGE CAPACITY;CATHODE CATALYSTS;IRON PHTHALOCYANINES;HEAT-TREATMENT;O-2 REDUCTION;ACTIVE-SITES,frederic.jaouen@univ-montp2.fr,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000335877000027,2-s2.0-84891861049,France,univ-montp2.fr,Univ Montpellier 2,"Univ Montpellier 2, France","Morozan, Adina; Sougrati, Moulay Tahar; Goellner, Vincent; Jones, Deborah; Stievano, Lorenzo; Jaouen, Frederic"
"Zhu, H., Paddison, S.J., Zawodzinski, T.A.","Effect of ligand, support and solvent on the O2 binding of non-precious metal catalysts: An AB initio study",2012,ECS Transactions,45,2,,97,107,,2,10.1149/1.3701971,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84869019987&doi=10.1149%2F1.3701971&partnerID=40&md5=771e01c02d157e528f5224fc0533e245,"Tickle College of Engineering, Knoxville, TN, United States","Zhu, Hongjuan, Tickle College of Engineering, Knoxville, TN, United States; Paddison, Stephen J., Tickle College of Engineering, Knoxville, TN, United States; Zawodzinski, Thomas A., Tickle College of Engineering, Knoxville, TN, United States","Non-precious metal (NPM) catalysts have been under extensive studyto replace expensive platinum based catalysts utilized in the Oxygen Reduction Reaction (ORR) in polymer electrolyte membrane (PEM) fuel cells. In this work, density functional theory (DFT) calculations were undertakento understand the effect of structure, choice of the central metal, and support on a series of ML<inf>2</inf> catalysts where M = Cu(I), Cu(II), Fe(II), Fe(III), Ni(II), and Co(II), and L = diaminetriazole (M-N<inf>2</inf>). O<inf>2</inf> binding was determinedto involve the d-based anti-bonding d<inf>xz</inf> and d<inf>z2</inf> orbitals of thecatalysts and two singly occupied π* orbitals of O <inf>2</inf>. When the catalysts were considered in an aqueous media (i.e., unsupported), Fe(II) exhibited the strongest O<inf>2</inf> binding,followed by Co(II), Fe(III), Ni(II) and Cu(I); whereas the binding was observed in Cu(II).This order in the binding seems to correlate with the energy gap between the d orbitals of the metal cation and the π* of the triplet O <inf>2</inf>, with the smaller the gap resulting in stronger O<inf>2</inf> binding. When a support and an explicit solvent moleculewere considered, the catalysts showed comparable O<inf>2</inf> and H<inf>2</inf>O bindingmaking the O<inf>2</inf> binding through H<inf>2</inf>O displacement much less favorable. Hence, the difference in the binding Of H<inf>2</inf>O and O<inf>2</inf> is seen to be critical in evaluating the activity of the catalyst.",,Binding energy; Calculations; Catalyst activity; Chemical bonds; Cobalt compounds; Copper compounds; Electrolytic reduction; Iron compounds; Polyelectrolytes; Precious metals; Proton exchange membrane fuel cells (PEMFC); Antibonding; Aqueous media; Central metals; D orbitals; Density-functional theory calculations; Non-precious metal catalysts; Orbitals; Oxygen reduction reaction; Platinum based catalyst; ]+ catalyst; Density functional theory,Binding energy;Calculations;Catalyst activity;Chemical bonds;Cobalt compounds;Copper compounds;Electrolytic reduction;Iron compounds;Polyelectrolytes;Precious metals;Proton exchange membrane fuel cells (PEMFC);Antibonding;Aqueous media;Central metals;D orbitals;Density-functional theory calculations;Non-precious metal catalysts;Orbitals;Oxygen reduction reaction;Platinum based catalyst;]+ catalyst;Density functional theory,,,,Tutorials on Electrocatalysis in Low Temperature Fuel Cells - 221st ECS Meeting,,,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-84869019987,,United States,No email,,,"Zhu, H.; Paddison, S.J.; Zawodzinski, T.A."
"Yoon, H.S., Jung, W.S.",Effect of Nitrogen Precursors in Non-precious Metal Catalysts on Activity for the Oxygen Reduction Reaction,2022,KOREAN CHEMICAL ENGINEERING RESEARCH,60,1,,151,158,8,2,10.9713/kcer.2022.60.1.151,,"[Yoon, Ho Seok; Jung, Won Suk] Hankyong Natl Univ, Sch Food Biotechnol & Chem Engn, 327 Jungang Ro, Anseong 17579, South Korea; [Jung, Won Suk] Hankyong Natl Univ, Res Ctr Chem Technol, 327 Jungang Ro, Anseong 17579, Gyeonggi Do, South Korea",,"Iron and nitrogen coordinated carbon catalyst (Fe-N-C) is the most promising non-precious metal catalyst (NPMC) studied to alternate the Pt-group oxygen reduction reaction (ORR) catalyst. In this work, Fe/N/C type catalysts are prepared by four different nitrogen precursors; N, N, N', N'-tetramethylethylenecliamine (TMEDA), 1,2-ethylenediamine (EDA), m-dicyanobenzene (DCB), dicyandiamide (DCDA) which can chelate a transition metal; In addition, the catalysts conducted the pyrolysis process at four different temperatures of 700, 800, 900, 1000 degrees C to investigate the ORR activities depend on pyrolysis temperature and to find an appropriate temperature. The characterizations of catalysts were investigated by scanning electron microscope-energy dispersive X-ray spectrometer (SEM-EDS), X-ray diffraction (XRD), and element analysis (EA). The electrocatalytic activity was measured by ORR polarization, also the electron transfer number was calculated from the slope of the K-L plot. The FeNC-EDA-800 which were prepared at pyrolysis temperature of 800 degrees C with EDA showed better ORR activity than the other catalysts.",Polymer electrolyte membrane fuel cells; Oxygen reduction reaction; Non-precious metal; catalysts; nitrogen sources,POROUS CARBON; N-C; CATHODE CATALYST; ALLOY CATALYST; HOLLOW SPHERES; FE; SITES; PERFORMANCE; DURABILITY; COMPLEXES,Polymer electrolyte membrane fuel cells;Oxygen reduction reaction;Non-precious metal;catalysts;nitrogen sources;POROUS CARBON;N-C;CATHODE CATALYST;ALLOY CATALYST;HOLLOW SPHERES;FE;SITES;PERFORMANCE;DURABILITY;COMPLEXES,dennis966@hknu.ac.kr; jungw@hknu.ac.kr,,"F.5, 119, ANAM-RO, SEONGBUK-GU, SEOUL 136-075, SOUTH KOREA",,,,KOREAN INSTITUTE CHEMICAL  ENGINEERS,0304-128X,,,,Korean,KOREAN CHEM ENG RES,Article,WoS,Engineering,WOS:000753380000007,2-s2.0-85128459407,South Korea,hknu.ac.kr,Hankyong Natl Univ,"Hankyong Natl Univ, South Korea","Yoon, Ho Seok; Jung, Won Suk"
"Zierdt, T., Mueller-Huelstede, J., Schmies, H., Schonvogel, D., Wagner, P., Friedrich, K.A.",Effect of Polytetrafluorethylene Content in Fe-N-C-Based Catalyst Layers of Gas Diffusion Electrodes for HT-PEM Fuel Cell Applications,2024,CHEMELECTROCHEM,11,5,,,,10,6,10.1002/celc.202300583,,"[Zierdt, Tanja; Mueller-Huelstede, Julia; Schmies, Henrike; Schonvogel, Dana; Wagner, Peter] German Aerosp Ctr DLR, Inst Engn Thermodynam, Carl von Ossietzky Str 15, D-26129 Oldenburg, Germany; [Friedrich, K. Andreas] German Aerosp Ctr DLR, Inst Engn Thermodynam, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germany; [Zierdt, Tanja; Friedrich, K. Andreas] Univ Stuttgart, Inst Bldg Energet Thermotechnol & Energy Storage I, Pfaffenwaldring 31, D-70569 Stuttgart, Germany",,"Fe-N-C catalysts are a promising alternative to replace cost-intensive Pt-based catalysts in high temperature polymer electrolyte membrane fuel cell (HT-PEMFC) electrodes. However, the electrode fabrication needs to be adapted for this new class of catalysts. In this study, gas diffusion electrodes (GDEs) are fabricated using a commercial Fe-N-C catalyst and different polytetrafluorethylene (PTFE) binder ratios, varying from 10 to 50 wt % in the catalyst layer (CL). The oxygen reduction reaction performance is investigated under HT-PEMFC conditions (160 degrees C, conc. H3PO4 electrolyte) in a half-cell setup. The acidophilic character of the Fe-N-C catalyst leads to intrusion of phosphoric acid electrolyte into the CL. The strength of the acid penetration depends on the PTFE content, which is visible via the contact angles. The 10 wt % PTFE GDE is less capable to withdraw product water and electrolyte and results into the lowest half-cell performance. Higher PTFE contents counterbalance the acid drag into the CL and impede flooding. The power density at around 130 mA mgCatalyst-2 increases by 34 % from 10 to 50 wt % PTFE. Platinum-based electrodes are cost-intensive and partly poisoned by phosphate ions (proton conductor) in the high temperature polymer electrolyte membrane fuel cell (HT-PEMFC). Fe-N-C-based electrodes do not contain noble metals and are not poisoned by phosphate ions. These catalysts show sufficient performance, however are still outperformed and less stable compared to Pt-catalyst in HT-PEMFC cells. Therefore, investigation of Fe-N-C electrodes is necessary.image",Electrocatalyst; Fe-N-C; Gas Diffusion Electrode; High-Temperature PEMFC; PTFE,PGM-FREE; ELECTROCATALYSTS; PERFORMANCE; ADSORPTION; CARBON; BINDER,Electrocatalyst;Fe-N-C;Gas Diffusion Electrode;High-Temperature PEMFC;PTFE;PGM-FREE;ELECTROCATALYSTS;PERFORMANCE;ADSORPTION;CARBON;BINDER,tanja.zierdt@dlr.de,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,2196-0216,,,,English,CHEMELECTROCHEM,Article,WoS,Electrochemistry,WOS:001140994900001,2-s2.0-85182209664,Germany,dlr.de,German Aerosp Ctr DLR;Univ Stuttgart,"German Aerosp Ctr DLR, Germany;Univ Stuttgart, Germany","Zierdt, Tanja; Mueller-Huelstede, Julia; Schmies, Henrike; Schonvogel, Dana; Wagner, Peter; Friedrich, K. Andreas"
"Gumeci, C., Leonard, N., Liu, Y.C., McKinney, S., Halevi, B., Barton, S.C.",Effect of pyrolysis pressure on activity of Fe-N-C catalysts for oxygen reduction,2015,JOURNAL OF MATERIALS CHEMISTRY A,3,43,,21494,21500,7,34,10.1039/c5ta05995j,,"[Gumeci, Cenk; Leonard, Nathaniel; Liu, Yuanchao; Barton, Scott Calabrese] Michigan State Univ, Dept Chem Engn & Mat Sci, E Lansing, MI 48824 USA; [McKinney, Samuel; Halevi, Barr] Pajarito Powder LLC, Albuquerque, NM 87102 USA",,"Iron and nitrogen doped carbon, Fe-N-C, catalysts are synthesized by high pressure pyrolysis of Ketjenblack carbon, melamine and iron acetate precursor mixture in a closed, reusable scale-up stainless steel reactor. The effects of precursor loading with constant precursor ratios on obtained pressure, nitrogen retention and oxygen reduction reaction (ORR) activities are studied. The results indicate that higher precursor loading increases the gas phase pressure and improves nitrogen retention and ORR activity. Furthermore, a relationship is found between active site density, nitrogen retention and pressure that suggests that the limiting reaction may be an adsorption process driven via high pressure of volatile intermediates from the melamine.",,PEM FUEL-CELL; METAL ELECTROCATALYSTS; CARBON SUPPORTS; IRON; GRAPHENE; ADSORPTION; COMPOSITE; CATHODE; CNX,PEM FUEL-CELL;METAL ELECTROCATALYSTS;CARBON SUPPORTS;IRON;GRAPHENE;ADSORPTION;COMPOSITE;CATHODE;CNX,cenk.gumeci@nissan-usa.com; scb@msu.edu,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000364020400012,,United States,nissan-usa.com,Michigan State Univ;Pajarito Powder LLC,"Michigan State Univ, United States;Pajarito Powder LLC, United States","Gumeci, Cenk; Leonard, Nathaniel; Liu, Yuanchao; McKinney, Samuel; Halevi, Barr; Barton, Scott Calabrese"
"Gianola, G., Cosenza, A., Roiron, C., Pirri, C.F., Specchia, S., Atanassov, P., Zeng, J.",Effect of silica leaching treatment during template-assisted synthesis on the performance of FeNC catalysts for oxygen reduction reaction,2025,Electrochimica Acta,525,,146085,,,,4,10.1016/j.electacta.2025.146085,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105001043114&doi=10.1016%2Fj.electacta.2025.146085&partnerID=40&md5=1e88c80ed43bd4f7ff71835760eb3d54,"Istituto Italiano di Tecnologia, Genoa, GE, Italy; Politecnico di Torino, Turin, TO, Italy; Samueli School of Engineering, Irvine, CA, United States","Gianola, Giulia, Istituto Italiano di Tecnologia, Genoa, GE, Italy, Politecnico di Torino, Turin, TO, Italy; Cosenza, Alessio, Samueli School of Engineering, Irvine, CA, United States; Roiron, Camille, Samueli School of Engineering, Irvine, CA, United States; Pirri, Fabrizio C., Istituto Italiano di Tecnologia, Genoa, GE, Italy, Politecnico di Torino, Turin, TO, Italy; Specchia, Stefania, Politecnico di Torino, Turin, TO, Italy; Atanassov, Plamen B., Samueli School of Engineering, Irvine, CA, United States; Zeng, Juqin, Istituto Italiano di Tecnologia, Genoa, GE, Italy, Politecnico di Torino, Turin, TO, Italy","The development of cost-effective and environmentally sustainable electrocatalysts is crucial for advancing the commercialization of proton exchange membrane fuel cells (PEMFCs). In this work, we investigate the effect of different silica leaching strategies on the synthesis of iron-nitrogen-carbon (FeNC) electrocatalysts for the oxygen reduction reaction (ORR). Three FeNC samples were prepared using SBA-15 mesoporous silica as the template and subjected to varying removal techniques: hydrofluoric acid (HF), sodium hydroxide followed by hydrochloric acid (NaOH+HCl), and an acid-free Teflon-assisted process. Physical-chemical characterization reveals significant differences in the surface area and porosity of the three catalysts. The specific surface areas of FeNC treated with NaOH+HCl and HF are 1352 m²/g and 1403 m²/g, respectively, while the Teflon-treated sample exhibits a much lower value of 732 m²/g. Electrochemical tests using a rotating ring disk electrode (RRDE) apparatus demonstrate superior ORR activity of the FeNC treated with NaOH+HCl, achieving onset potentials of 0.93 V<inf>RHE</inf> and 0.81 V<inf>RHE</inf> in alkaline and acidic media, respectively, outperforming the HF- and Teflon-treated counterparts. The HF treatment, while effective in removing silica and metallic impurities, poses environmental and safety challenges. The Teflon-assisted approach, despite its promise as a greener alternative, results in a lower surface area and diminished ORR activity, with onset potentials of 0.89 V<inf>RHE</inf> and 0.76 V<inf>RHE</inf> in alkaline and acidic media, respectively. This study highlights the importance of optimizing silica removal methods to balance the catalyst performance, safety and sustainability, with the NaOH+HCl method emerging as the most effective approach for producing high-performance FeNC ORR catalysts for fuel cell applications. © 2025",Activity; Iron-nitrogen-carbon catalyst; Mesoporous; Oxygen reduction reaction; Silica removal,Bioremediation; Electrolysis; Electrolytic reduction; Mesopores; Mesoporous materials; Oxygen reduction reaction; Rate constants; Activity; Carbon catalysts; Iron nitrogen; Iron-nitrogen-carbon catalyst; Mesoporous; Nitrogen-carbon; Silica removal; Surface area; ]+ catalyst; Leaching,Activity;Iron-nitrogen-carbon catalyst;Mesoporous;Oxygen reduction reaction;Silica removal;Bioremediation;Electrolysis;Electrolytic reduction;Mesopores;Mesoporous materials;Rate constants;Carbon catalysts;Iron nitrogen;Nitrogen-carbon;Surface area;]+ catalyst;Leaching,"G. Gianola; Center for Sustainable Future Technologies, Istituto Italiano di Tecnologia, Torino, Via Livorno, 60, 10144, Italy; email: giulia.gianola@iit.it",,,,,,Elsevier Ltd,00134686,,ELCAA,,English,Electrochim Acta,Article,Scopus,,2-s2.0-105001043114,,Italy;United States,iit.it,,,"Gianola, G.; Cosenza, A.; Roiron, C.; Pirri, C.F.; Specchia, S.; Atanassov, P.; Zeng, J."
"Chen, X., Zhang, Y., Zhao, X., Yu, H., Zhang, H.",Effect of the Axial Halogen Ligand on the Oxygen Reduction Reaction Performance of Transition Metal-Nitrogen-Carbon Catalysts,2023,Journal of Physical Chemistry C,127,29,,14107,14116,,16,10.1021/acs.jpcc.3c02628,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85165875592&doi=10.1021%2Facs.jpcc.3c02628&partnerID=40&md5=60be07fefa98e0d5717f8e125461ec51,"Center for Computational Chemistry and Molecular Simulation, Southwest Petroleum University China, Chengdu, Sichuan, China; Key Laboratory of Fine Chemical Application Technology of Luzhou, Luzhou, China; Department of Technical Physics, Itä-Suomen yliopisto, Kuopio, IS, Finland; Institute of Photovoltaics, Southwest Petroleum University China, Chengdu, Sichuan, China","Chen, Xin, Center for Computational Chemistry and Molecular Simulation, Southwest Petroleum University China, Chengdu, Sichuan, China, Key Laboratory of Fine Chemical Application Technology of Luzhou, Luzhou, China; Zhang, Yizhen, Center for Computational Chemistry and Molecular Simulation, Southwest Petroleum University China, Chengdu, Sichuan, China; Zhao, Xiuyun, Department of Technical Physics, Itä-Suomen yliopisto, Kuopio, IS, Finland; Yu, Hua, Institute of Photovoltaics, Southwest Petroleum University China, Chengdu, Sichuan, China; Zhang, Hui, Center for Computational Chemistry and Molecular Simulation, Southwest Petroleum University China, Chengdu, Sichuan, China","The high cost of a cathode oxygen reduction reaction (ORR) catalyst is the key technical bottleneck of developing the proton-exchange membrane fuel cell. The performance of the commonly studied ORR materials is hindered by unfavorable scaling relationships for binding energies of reaction intermediates. In this work, the density functional theory calculations are applied to explore the binding behaviors of ORR intermediates and catalytic mechanism on axially halogen-coordinated M-N-C catalysts (MN<inf>4</inf>X<inf>n</inf>, M = Fe, Co, Ni; X = F, Cl, Br, I; n = 0-2). The results show that all MN<inf>4</inf> can serve stably to avoid aggregation and dissolution. The favorable scaling relationship for ORR intermediates and matchless theoretical highest ORR activity at volcano peak unravel intrinsically why the M-N-C SACs hold a state-of-the-art place for ORR performance. The CoN<inf>4</inf>Cl and CoN<inf>4</inf>Br stand out with the ultralow ORR overpotential values of 0.25 and 0.26 V, respectively. Finally, a new intrinsic descriptor φ is proposed to appropriately describe the ORR activity of the non-axial-coordinated and axial-coordinated M-N-C catalysts. These findings reveal the intrinsic advantages of M-N-C SACs for ORR catalysis and rationally provide theoretical insights into designing advanced SAC materials. © 2023 American Chemical Society.",,Binding energy; Bromine compounds; Carbon; Catalysis; Catalysts; Chlorine compounds; Cobalt compounds; Density functional theory; Electrolytic reduction; Manganese compounds; Nitrogen; Oxygen; Proton exchange membrane fuel cells (PEMFC); Transition metals; Carbon catalysts; Halogen ligands; High costs; Nitrogen-carbon; Oxygen reduction reaction; Proton-exchange membranes fuel cells; Reaction activity; Reaction performance; Scaling relationships; ]+ catalyst; Reaction intermediates,Binding energy;Bromine compounds;Carbon;Catalysis;Catalysts;Chlorine compounds;Cobalt compounds;Density functional theory;Electrolytic reduction;Manganese compounds;Nitrogen;Oxygen;Proton exchange membrane fuel cells (PEMFC);Transition metals;Carbon catalysts;Halogen ligands;High costs;Nitrogen-carbon;Oxygen reduction reaction;Proton-exchange membranes fuel cells;Reaction activity;Reaction performance;Scaling relationships;]+ catalyst;Reaction intermediates,"X. Chen; Center for Computational Chemistry and Molecular Simulation, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, 610500, China; email: chenxin830107@pku.edu.cn; H. Zhang; Center for Computational Chemistry and Molecular Simulation, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, 610500, China; email: huizhang@swpu.edu.cn",,,,,,American Chemical Society,19327447,,,,English,J. Phys. Chem. C,Article,Scopus,,2-s2.0-85165875592,,China;Finland,pku.edu.cn,,,"Chen, X.; Zhang, Y.; Zhao, X.; Yu, H.; Zhang, H."
"Lee, J.S., Jung, W.S.",Effect of the Ratio of Oxidizing Agent to Monomer for Polyaniline Synthesis on the Activity of Catalyst for Oxygen Reduction Reaction in Anion Exchange Membrane Fuel Cells,2024,POLYMER-KOREA,48,3,,318,325,8,1,10.7317/pk.2024.48.3.318,,"[Lee, Jae Sang] Hankyong Natl Univ, Sch Food Biotechnol & Chem Engn, 327 Jungang Ro, Anseong 17579, South Korea; [Jung, Won Suk] Hankyong Natl Univ, Res Ctr Chem Technol, 327 Jungang Ro, Anseong 17579, South Korea",,"Anion exchange membrane fuel cells are attractive while proton exchange membrane fuel cells need costly precious metal for the catalysts and have durability issue. Anion exchange membrane fuel cells have low activation energy and use non-precious metals as catalysts for the oxygen reduction reaction, which can operate the system with low cost. In this study, we study the polyaniline-derived catalysts with different molar ratios of monomer to oxidizing agent for the activity toward the oxygen reduction reaction. As a function of molar ratio of monomer and oxidizing agent, the physical property and the catalytic activity are observed by various electrochemical characterizations and physicochemical techniques. The research can help the commercialization of anion exchange membrane fuel cells since the conductive polymer is widely used for the synthesis of non-precious metal catalysts, provided the optimal condition for the polyaniline synthesis in the electrochemical application.",anion exchange membrane fuel cells; polyaniline; oxidizing agent; activity; non-precious metal catalyst,CARBON NANOTUBES; NANOFIBERS,anion exchange membrane fuel cells;polyaniline;oxidizing agent;activity;non-precious metal catalyst;CARBON NANOTUBES;NANOFIBERS,jungw@hknu.ac.kr,,"ROOM 601, HATCHON BUILDING, 831 YEOKSAM-DONG, KANGNAM-KU, SEOUL 135-792, SOUTH KOREA",,,,POLYMER SOC KOREA,0379-153X,,,,Korean,POLYM-KOREA,Article,WoS,Polymer Science,WOS:001314307200012,2-s2.0-85195119512,South Korea,hknu.ac.kr,Hankyong Natl Univ,"Hankyong Natl Univ, South Korea","Lee, Jae Sang; Jung, Won Suk"
"Xu, P., Chen, W., Wang, Q., Zhu, T., Wu, M., Qiao, J., Chen, Z., Zhang, J.","Effects of transition metal precursors (Co, Fe, Cu, Mn, or Ni) on pyrolyzed carbon supported metal-aminopyrine electrocatalysts for oxygen reduction reaction",2015,RSC Advances,5,8,,6195,6206,,69,10.1039/c4ra11643g,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921928232&doi=10.1039%2Fc4ra11643g&partnerID=40&md5=000a3ea61aec7ede0af56d9c2eeef377,"Donghua University, Shanghai, Shanghai, China; State Grid Shanghai Songjiang Electric Power Supply Company, Shanghai, Shanghai, China; Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada","Xu, Pan, Donghua University, Shanghai, Shanghai, China; Chen, Wenzhao, Donghua University, Shanghai, Shanghai, China; Wang, Qiang, State Grid Shanghai Songjiang Electric Power Supply Company, Shanghai, Shanghai, China; Zhu, Taishan, Donghua University, Shanghai, Shanghai, China; Wu, Mingjie, Donghua University, Shanghai, Shanghai, China; Qiao, Jinli, Donghua University, Shanghai, Shanghai, China; Chen, Zhongwei, Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada; Zhang, Jiujun, Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada","In the past four decades, non-precious metal catalysts (NPMCs) have been extensively studied as low-cost catalyst alternatives to Pt for the oxygen reduction reaction (ORR) in polymer electrolyte membrane (PEM) fuel cells. However, the role of transition metal playing in the catalysts' active sites is still a subject of controversy. In order to further clarify the nature of the active sites of NPMCs, in this work, using aminopyrine (Apyr) as the nitrogen precursor, Co-, Fe-, Cu-, Mn-, and Ni-incorporated nitrogen-containing electrocatalysts are synthesized for fuel cell ORR in alkaline media. The catalysts' ORR performance can be significantly improved by pyrolysis when the catalysts are incorporated by different transition metals. The observed catalytic activity order is: Co 蠑 Fe ∼ Cu > Mn 蠑 Ni. However, with respect to the electron transfer numbers (selectivity), the order is: Fe > Mn > Co 蠑 Cu > Ni. XRD results reveal that Mn and Fe are more likely to be combined with S than Co, Ni and Cu. XPS analysis indicates that N concentration has a negative correlation with S concentration in the pyrolyzed catalysts, indicating a competitive mechanism between N and S on catalyst surfaces when metal sulfate is applied as the transition metal precursor. For ORR active site identification, the surface N species analysis reveals that catalyst containing more M-N group would give a higher catalytic ORR activity, while the metal incorporation is essential in the ORR active site structure, forming the M-N<inf>x</inf>/C catalysts rather than just serving to catalyze the formation of N/C active sites. © The Royal Society of Chemistry 2015.",,Catalysts; Electrocatalysts; Electrolytic reduction; Fuel cells; Manganese; Metals; Nickel; Nitrogen; Oxygen; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Pyrolysis; Transition metals; Active site structure; Competitive mechanisms; Low cost catalysts; Metal incorporation; Negative correlation; Non-precious metal catalysts; Oxygen reduction reaction; Polymer electrolyte membranes; Catalyst activity,Catalysts;Electrocatalysts;Electrolytic reduction;Fuel cells;Manganese;Metals;Nickel;Nitrogen;Oxygen;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Pyrolysis;Transition metals;Active site structure;Competitive mechanisms;Low cost catalysts;Metal incorporation;Negative correlation;Non-precious metal catalysts;Oxygen reduction reaction;Polymer electrolyte membranes;Catalyst activity,,,,,,,Royal Society of Chemistry,,,RSCAC,,English,RSC Adv.,Article,Scopus,,2-s2.0-84921928232,,China;Canada,No email,,,"Xu, P.; Chen, W.; Wang, Q.; Zhu, T.; Wu, M.; Qiao, J.; Chen, Z.; Zhang, J."
"Oh, T., Kim, J.Y., Shin, Y., Engelhard, M., Weil, K.S.",Effects of tungsten oxide addition on the electrochemical performance of nanoscale tantalum oxide-based electrocatalysts for proton exchange membrane (PEM) fuel cells,2011,JOURNAL OF POWER SOURCES,196,15,,6099,6103,5,34,10.1016/j.jpowsour.2011.03.058,,"[Oh, Takkeun; Kim, Jin Yong; Shin, Yongsoon; Engelhard, Mark; Weil, K. Scott] Pacific NW Natl Lab, Richland, WA 99352 USA",,"In the present study, the properties of non-platinum based nanoscale tantalum oxide/tungsten oxide-carbon composite catalysts were investigated for potential use in catalyzing the oxygen reduction reaction on the cathode side of a PEM fuel cell. All of the tantalum oxide-based catalysts exhibit high ORR on-set potentials, comparable with the commercial Pt/C catalyst even though oxygen reduction current was limited. The tungsten oxide doping to tantalum oxide improved catalytic performance. The performance enhancement was due to a decrease in resistance polarization with increasing tungsten content mainly due to the decrease in resistance polarization. XPS results indicate that the oxidation state of tungsten is +6 and that of the tantalum is +5, suggesting that excess oxygen is generated in the resulting oxide structure. This compositional effect seems to reduce resistance polarization by altering the surface chemistry of the tantalum oxide and enhancing the reaction steps such as surface diffusion. Maximum performance was achieved with a catalyst containing 32 mol% of tungsten oxide, reaching a mass specific current density of similar to 7% that of the commercial Pt/C catalyst at 0.6 V vs. NNE and similar to 35% at 0.2 V vs. NHE. In term of area-specific current density, five-fold increase in loading of the doped catalyst leads to a 4-4.5 fold increase in area specific current density at 0.6V vs. NNE, reaching 66% that of the Pt/C catalyst at 100 rpm and 35% at 2400 rpm. Published by Elsevier B.V.",PEM; ORR; Tantalum oxide-based catalyst; Non-PGM catalyst,OXYGEN REDUCTION REACTION; CATALYTIC-ACTIVITY; ELECTRODE; CATHODES,PEM;ORR;Tantalum oxide-based catalyst;Non-PGM catalyst;OXYGEN REDUCTION REACTION;CATALYTIC-ACTIVITY;ELECTRODE;CATHODES,Jin.Kim@pnl.gov,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:000292068300014,2-s2.0-79956360334,United States,pnl.gov,Pacific NW Natl Lab,"Pacific NW Natl Lab, United States","Oh, Takkeun; Kim, Jin Yong; Shin, Yongsoon; Engelhard, Mark; Weil, K. Scott"
"Zhang, J.L., Zhang, L., Bezerra, C.W.B., Li, H., Xia, Z.T., Zhang, J.J., Marques, A.L.B., Marques, E.P.",EIS-assisted performance analysis of non-noble metal electrocatalyst (Fe-N/C)-based PEM fuel cells in the temperature range of 23-80 °C,2009,ELECTROCHIMICA ACTA,54,6,,1737,1743,7,33,10.1016/j.electacta.2008.10.006,,"[Zhang, Jianlu; Zhang, Lei; Bezerra, Cicero W. B.; Li, Hui; Xia, Zetao; Zhang, Jiujun] Natl Res Council Canada, Inst Fuel Cell Innovat, Vancouver, BC V6T 1W5, Canada; [Li, Hui; Marques, Aldala L. B.; Marques, Edmar P.] Univ Fed Maranhao, Dept Chem, BR-65080040 Sao Luis, MA, Brazil",,"A carbon-supported non-noble metal catalyst, Fe-N/C,was used as the cathode catalyst to construct membrane electrolyte assemblies (MEAs) for a proton exchange membrane (PEM) fuel cell. The performance of such a fuel cell was then tested and diagnosed using electrochemical impedance spectroscopy (EIS) in the temperature range of 23-8 degrees C. Based on the EIS measurements, individual resistances, such as charger transfer resistance and membrane resistance, were obtained and used to simulate polarization curves (current-voltage (I-V) curves). A close agreement between the simulated I-V curves and the measured curves demonstrates consistency between the polarization and EIS data. The temperature-dependent parameters obtained via EIS, such as apparent exchange current densities and electrolyte membrane conductivities. were also used to acquire activation energies for both the oxygen reduction reaction (ORR) catalyzed by an Fe-N/C catalyst and the proton transport process across the electrolyte membrane. In addition, the maximum power densities for such a fuel cell were also analyzed. (C) 2008 Elsevier Ltd. All rights reserved.",PEM fuel cells; Non-noble metal (carbon-supported iron-nitrogen) catalyst; AC impedance/electrochemical impedance spectroscopy (EIS); Oxygen reduction reaction (ORR); Exchange current density,OXYGEN REDUCTION REACTION; AC-IMPEDANCE; WATER-CONTENT; CARBON-BLACK; MEMBRANE; DEPENDENCE; DIAGNOSIS; CATALYST,PEM fuel cells;Non-noble metal (carbon-supported iron-nitrogen) catalyst;AC impedance/electrochemical impedance spectroscopy (EIS);Oxygen reduction reaction (ORR);Exchange current density;OXYGEN REDUCTION REACTION;AC-IMPEDANCE;WATER-CONTENT;CARBON-BLACK;MEMBRANE;DEPENDENCE;DIAGNOSIS;CATALYST,jiujun.zhang@nrc.gc.ca,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000263441800013,2-s2.0-58249141764,Canada;Brazil,nrc.gc.ca,Natl Res Council Canada;Univ Fed Maranhao,"Natl Res Council Canada, Canada;Univ Fed Maranhao, Brazil","Zhang, Jianlu; Zhang, Lei; Bezerra, Cicero W. B.; Li, Hui; Xia, Zetao; Zhang, Jiujun; Marques, Aldala L. B.; Marques, Edmar P."
"Ismail, N., Qin, F., Fang, C., Liu, D., Liu, B., Liu, X., Wu, Z.L., Chen, Z., Chen, W.",Electrocatalytic acidic oxygen evolution reaction: From nanocrystals to single atoms,2021,Aggregate,2,4,e106,,,,52,10.1002/agt2.106,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85160627042&doi=10.1002%2Fagt2.106&partnerID=40&md5=6a5dcdf97ad968ee195a4432eb283481,"Department of Materials Physics and Chemistry, Beijing Institute of Technology, Beijing, China; Research Institute of Petroleum Exploration and Development, Beijing, China","Ismail, Nadia, Department of Materials Physics and Chemistry, Beijing Institute of Technology, Beijing, China; Qin, Fengjuan, Department of Materials Physics and Chemistry, Beijing Institute of Technology, Beijing, China; Fang, Chaohe, Research Institute of Petroleum Exploration and Development, Beijing, China; Liu, Dan, Department of Materials Physics and Chemistry, Beijing Institute of Technology, Beijing, China; Liu, Bihan, Department of Materials Physics and Chemistry, Beijing Institute of Technology, Beijing, China; Liu, Xiangyu, Department of Materials Physics and Chemistry, Beijing Institute of Technology, Beijing, China; Wu, Zilong, Department of Materials Physics and Chemistry, Beijing Institute of Technology, Beijing, China; Chen, Zhuo, Department of Materials Physics and Chemistry, Beijing Institute of Technology, Beijing, China; Chen, Wenxing, Department of Materials Physics and Chemistry, Beijing Institute of Technology, Beijing, China","Hydrogen is the most preferred choice as an energy source to replace the nonrenewable energy resources such as fossil fuels due to its beneficial features of abundance, ecofriendly, and outstanding gravimetric energy density. Splitting water through a proton exchange membrane (PEM) electrolyzer is a well-known method of hydrogen production. But the major impediment is the sluggish kinetics of oxygen evolution reaction (OER). Currently, scientists are struggling to build out an acid-stable electrocatalyst for OER with low overpotential and excellent stability. In this review, the reaction mechanism and characterization parameters of OER are introduced, and then the improvement method of metal nanocatalysts (noble metal catalysts and noble metal-free catalysts) in acidic media is discussed. Particularly, the application of single-atom catalysts in acidic OER is summarized, which is current researching focus. At the same time, we also briefly introduced the cluster phenomenon, which is easy to occur in the preparation of single-atom catalysts. More importantly, we summarized the in situ characterization methods such as in situ X-ray absorption spectroscopy, in situ X-ray photoelectron spectroscopy, and so forth, which are conducive to further understanding of OER reaction intermediates and active sites. Finally, we put forward some opinions on the development of acidic OER. © 2021 The Authors. Aggregate published by John Wiley & Sons Australia, Ltd on behalf of South China University of Technology and AIE Institute.",acidic media; in situ characterization; nanocatalysis; oxygen evolution reaction; single-atom catalysis,Atoms; Electrocatalysts; Fossil fuels; High resolution transmission electron microscopy; Hydrogen production; Nanocatalysts; Precious metals; Proton exchange membrane fuel cells (PEMFC); Reaction intermediates; Reaction kinetics; X ray absorption spectroscopy; X ray photoelectron spectroscopy; Acidic media; Eco-friendly; Electrocatalytic; Energy source; In-situ characterization; Nanocatalysis; Non-renewable energy resources; Single-atom catalyse; Single-atoms; ]+ catalyst; Oxygen,acidic media;in situ characterization;nanocatalysis;oxygen evolution reaction;single-atom catalysis;Atoms;Electrocatalysts;Fossil fuels;High resolution transmission electron microscopy;Hydrogen production;Nanocatalysts;Precious metals;Proton exchange membrane fuel cells (PEMFC);Reaction intermediates;Reaction kinetics;X ray absorption spectroscopy;X ray photoelectron spectroscopy;Eco-friendly;Electrocatalytic;Energy source;In-situ characterization;Non-renewable energy resources;Single-atom catalyse;Single-atoms;]+ catalyst;Oxygen,"Z. Chen; Energy & Catalysis Center, Department of Materials Physics and Chemistry, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, China; email: zchen@bit.edu.cn; W. Chen; Energy & Catalysis Center, Department of Materials Physics and Chemistry, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, China; email: wxchen@bit.edu.cn; C. Fang; CNPC Research Institute of Petroleum Exploration & Development, Beijing, China; email: fangch69@petrochina.com.cn",,,,,,John Wiley and Sons Inc,27668541,,,,English,Aggreg.,Review,Scopus,,2-s2.0-85160627042,,China,bit.edu.cn,,,"Ismail, N.; Qin, F.; Fang, C.; Liu, D.; Liu, B.; Liu, X.; Wu, Z.-L.; Chen, Z.; Chen, W."
"Bhosale, T.S., Nisly, N., Molter, T., Rubio, S.J.B., Tasnim, H., Salamanca, S.T., Suib, S.L.",Electrochemical Hydrogen Separation and Recovery by Non-Platinum Group Metal Anode Catalyst (α-MoO3) on High-Temperature Proton Exchange Membrane Fuel Cell Stack,2025,ADVANCED ENERGY MATERIALS,,,,,,13,0,10.1002/aenm.202505653,,"[Bhosale, Tejas S.; Nisly, Nathaniel; Rubio, Samantha Joy B.; Tasnim, Habiba; Salamanca, Santiago T.; Suib, Steven L.] Univ Connecticut, Dept Chem, Storrs, CT 06269 USA; [Suib, Steven L.] Univ Connecticut, Inst Mat Sci, Storrs, CT 06269 USA; [Molter, Trent] Skyre INC, East Hartford, CT USA",,"The high-temperature proton exchange membrane fuel cell (HT-PEMFC) is a promising, clean, and highly efficient method for hydrogen recovery from plasma pyrolysis assembly (PPA) effluent, which requires an efficient electrochemical hydrogen pumping assembly that can tolerate carbon monoxide and limit side reactions with acetylene. A Platinum Group Metal (PGM) catalyst yields good durability for PEMFCs but poses a challenge due to its high cost and low tolerance to toxic gases. Tremendous effort is needed to develop non-PGM catalysts with improved performance, durability, and hydrogen recovery. In this work, we report a new mesoporous MoO3 anode catalyst that exhibits dual activity of HER and HOR, a state-of-the-art among Platinum (Pt)-free anode materials. The MoO3 catalyst displayed promising HER activity at a low overpotential of -120 mV vs RHE and showed comparable HOR activity (5.3 mW cm-2) with a platinum catalyst (8.8 mW cm-2), using Nafion and Celtec-P membranes under H2/air conditions. In H2CO/C2H2/air conditions at 150 degrees C, the MoO3 catalyst displayed hydrogen recovery of 43% using Nafion. In 46 h, it exhibited a constant 2.3% recovery using Celtec-P membrane, whereas the Pt-catalyst decreased from 18 to 0.6%. The results indicate a sustainable and cost-effective fuel cell system without compromising electrochemical efficiency.",high-temperature fuel cell; hor and her catalyst; hydrogen recovery; mesoporous catalyst,SURFACE; ELECTRODE; EVOLUTION; XPS; PERFORMANCE; GRAPHENE; CATHODE,high-temperature fuel cell;hor and her catalyst;hydrogen recovery;mesoporous catalyst;SURFACE;ELECTRODE;EVOLUTION;XPS;PERFORMANCE;GRAPHENE;CATHODE,steven.suib@uconn.edu,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1614-6832,,,,English,ADV ENERGY MATER,Article; Early Access,WoS,Chemistry; Energy & Fuels; Materials Science; Physics,WOS:001632565000001,2-s2.0-105024099652,United States,uconn.edu,Univ Connecticut;Skyre INC,"Univ Connecticut, United States;Skyre INC, United States","Bhosale, Tejas S.; Nisly, Nathaniel; Molter, Trent; Rubio, Samantha Joy B.; Tasnim, Habiba; Salamanca, Santiago T.; Suib, Steven L."
"Han, T., Dale, N., Adjemian, K., Nallathambi, V., Barton, S.C.",Electrochemical oxidation of surface oxides to partially recover the performance of non-PGM catalyst under fuel cell operation,2011,ECS Transactions,41,1,,2289,2296,,9,10.1149/1.3635762,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84866395112&doi=10.1149%2F1.3635762&partnerID=40&md5=8106462f3330662a2a248eec470d03a7,"Nissan Technical Center North America, Farmington Hills, MI, United States; College of Engineering, East Lansing, MI, United States","Han, Taehee, Nissan Technical Center North America, Farmington Hills, MI, United States; Dale, Nilesh V., Nissan Technical Center North America, Farmington Hills, MI, United States; Adjemian, Kev T., Nissan Technical Center North America, Farmington Hills, MI, United States; Nallathambi, Vijayadurga, College of Engineering, East Lansing, MI, United States; Barton, Scott Calabrese Calabrese, College of Engineering, East Lansing, MI, United States","An iron based metal-nitrogen-carbon (MNC) type oxygen reduction reaction catalyst was tested for in-situ polarization performance and durability. High open circuit voltage (OCV) of ∼0.97 V and high activities were observed. Current density around 750 mA/cm2 was obtained at 0.6 V <inf>iR-free</inf>/RHE and volumetric current density of 31 A/cm3 was obtained at 0.8 V<inf>iR-free</inf>. A significant decrease in polarization after start-stop durability test was observed for this catalyst. An attempt was made to recover the in-situ performance after start-stop durability test by running the fuel cell at steady state current density. Partial performance recovery was achieved from the significantly degraded MNC based membrane electrode assembly (MEA). However, performance could not be recovered indefinitely due to eventual carbon loss. © 2011 ECS - The Electrochemical Society.",,Carbon; Catalysts; Current density; Durability; Electrochemical oxidation; Electrolytic reduction; Open circuit voltage; Oxygen reduction reaction; Polarization; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Recovery; Durability test; Fuel cell operation; Membrane electrode assemblies; Non-PGM catalysts; Performance recovery; Situ polarization; Steady-state currents; Volumetric currents; Solid electrolytes,Carbon;Catalysts;Current density;Durability;Electrochemical oxidation;Electrolytic reduction;Open circuit voltage;Oxygen reduction reaction;Polarization;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Recovery;Durability test;Fuel cell operation;Membrane electrode assemblies;Non-PGM catalysts;Performance recovery;Situ polarization;Steady-state currents;Volumetric currents;Solid electrolytes,,,,"11th Polymer Electrolyte Fuel Cell Symposium, PEFC 11 - 220th ECS Meeting",,,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-84866395112,,United States,No email,,,"Han, T.; Dale, N.; Adjemian, K.; Nallathambi, V.; Barton, S.C."
"Silva, W.O., Silva, G.C., Webster, R.F., Benedetti, T.M., Tilley, R.D., Ticianelli, E.A.",Electrochemical Reduction of CO2 on Nitrogen-Doped Carbon Catalysts With and Without Iron,2019,CHEMELECTROCHEM,6,17,,4626,4636,11,20,10.1002/celc.201901144,,"[Silva, Wanderson O.; Silva, Gabriel C.; Ticianelli, Edson A.] Sao Carlos Inst Chem USP, Dept Phys Chem, Av Trabalhador Sao Carlense 400, Sao Carlos, SP, Brazil; [Webster, Richard F.; Tilley, Richard D.] Univ New South Wales, Mark Wainwright Analyt Ctr, Electron Microscope Unit, Sydney, NSW 2052, Australia; [Benedetti, Tania M.; Tilley, Richard D.] Univ New South Wales, Sch Chem, Sydney, NSW 2052, Australia",,"The carbon dioxide reduction reaction (CO2RR) catalyzed by N-doped carbon materials was studied under operando conditions by on line differential electrochemical mass spectrometry and in-line gas chromatography. Fe/NC electrocatalysts were synthesized by using a Fe+2-impregnated pyridyl/triazine complex heat treated at 800 degrees C in nitrogen (Fe/NC(N-2)) or ammonia (Fe/NC(NH3)) atmospheres; an iron-free nitrogen-doped carbon electrocatalyst (NC(NH3)) was also synthesized and included for comparison. Here, superior CO faradaic efficiencies were evidenced for NC(NH3) compared to Fe/NC(NH3), independently of the applied electrode potential; however, much larger overall catalytic activity for the promotion of the CO2RR and/or HER has been observed for Fe/NC(NH3), generating different stoichiometric ratios of syngas (CO/H-2). Another important evidence is that N-pyridinic groups, even in absence of Fe-N-4 moieties and presence of high iron nanoparticles loading, play an important role as active sites for selective CO2 reduction to CO at low overpotentials.",carbon dioxide reduction reaction (CO2RR); electrocatalysis; syngas; N-doped carbon electrocatalysts; on-line DEMS,PEM FUEL-CELL; N-C CATALYST; OXYGEN REDUCTION; FE/N/C-CATALYSTS; METAL-ELECTRODES; XPS SPECTRA; DIOXIDE; SITES; ELECTROCATALYSTS; IDENTIFICATION,carbon dioxide reduction reaction (CO2RR);electrocatalysis;syngas;N-doped carbon electrocatalysts;on-line DEMS;PEM FUEL-CELL;N-C CATALYST;OXYGEN REDUCTION;FE/N/C-CATALYSTS;METAL-ELECTRODES;XPS SPECTRA;DIOXIDE;SITES;ELECTROCATALYSTS;IDENTIFICATION,edsont@igsc.usp.br,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,2196-0216,,,,English,CHEMELECTROCHEM,Article,WoS,Electrochemistry,WOS:000485947800035,,Brazil;Australia,igsc.usp.br,Sao Carlos Inst Chem USP;Univ New South Wales,"Sao Carlos Inst Chem USP, Brazil;Univ New South Wales, Australia","Silva, Wanderson O.; Silva, Gabriel C.; Webster, Richard F.; Benedetti, Tania M.; Tilley, Richard D.; Ticianelli, Edson A."
"Masa, J., Schilling, T., Bron, M., Schuhmann, W.",Electrochemical synthesis of metal-polypyrrole composites and their activation for electrocatalytic reduction of oxygen by thermal treatment,2012,ELECTROCHIMICA ACTA,60,,,410,418,9,39,10.1016/j.electacta.2011.11.076,,"[Masa, Justus; Schilling, Thorsten; Bron, Michael; Schuhmann, Wolfgang] Ruhr Univ Bochum, D-44780 Bochum, Germany; [Schilling, Thorsten; Bron, Michael] Univ Halle Wittenberg, Inst Chem Tech Chem 1, D-06120 Halle, Saale, Germany",,"This work presents a new approach for synthesis of oxygen reduction catalysts constituted of a transition metal, nitrogen and carbon, by thermal treatment of electrochemically synthesized metal-polypyrrole (M-PPy) composites on glassy carbon electrodes. The synthesis procedure involves immobilization of PPy on glassy carbon followed by dosing of metal (M = Mn, Fe and Co) particles, alternately, by electropolymerization and electrochemical reduction respectively. Electrochemical characterization by cyclic voltammetry (CV) and hydrodynamic rotating disk electrode (ROE) measurements show that the M-PPy composites inherently catalyse the electroreduction of oxygen under acidic conditions. The activity of the composites is significantly augmented when they are heat treated at high temperatures (450-850 degrees C) under a continuous flow of nitrogen. The presence of metallic entities within the M-PPy composite structures and in the structures ensuing after heat treatment was confirmed by energy dispersive X-ray (EDX) analysis. (C) 2011 Elsevier Ltd. All rights reserved.",Metal-polypyrrole composites; Electrocatalytic reduction of oxygen; Thermal treatment; Non-precious metal catalysts,FE-BASED CATALYSTS; PEM FUEL-CELLS; HEAT-TREATMENT; C-N; STABILITY; ELECTRODE; PYRROLE; ELECTROPOLYMERIZATION; COBALT,Metal-polypyrrole composites;Electrocatalytic reduction of oxygen;Thermal treatment;Non-precious metal catalysts;FE-BASED CATALYSTS;PEM FUEL-CELLS;HEAT-TREATMENT;C-N;STABILITY;ELECTRODE;PYRROLE;ELECTROPOLYMERIZATION;COBALT,wolfgang.schuhmann@rub.de,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000300142100056,,Germany,rub.de,Ruhr Univ Bochum;Univ Halle Wittenberg,"Ruhr Univ Bochum, Germany;Univ Halle Wittenberg, Germany","Masa, Justus; Schilling, Thorsten; Bron, Michael; Schuhmann, Wolfgang"
"Sgarbi, R., Kumar, K., Savel'eva, V.A., Dubau, L., Chattot, R., Martin, V., Mermoux, M., Bordet, P., Glatzel, P., Ticianelli, E.A., Jaouen, F., Maillard, F.",Electrochemical transformation of Fe-N-C catalysts into iron oxides in alkaline medium and its impact on the oxygen reduction reaction activity,2022,Applied Catalysis B: Environmental,311,,121366,,,,36,10.1016/j.apcatb.2022.121366,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85127858728&doi=10.1016%2Fj.apcatb.2022.121366&partnerID=40&md5=cc201fcdc49b55df3f7d1b67b39cdc29,"Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Universidade de São Paulo, Sao Paulo, SP, Brazil; European Synchrotron Radiation Facility, Grenoble, Auvergne-Rhone-Alpes, France; Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Université de Montpellier, Montpellier, Occitanie, France","Sgarbi, Ricardo, Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France, Universidade de São Paulo, Sao Paulo, SP, Brazil; Kumar, Kavita, Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Savel’eva, Viktoriia A., European Synchrotron Radiation Facility, Grenoble, Auvergne-Rhone-Alpes, France; Dubau, Laetitia, Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Chattot, Raphaël, European Synchrotron Radiation Facility, Grenoble, Auvergne-Rhone-Alpes, France; Martin, Vincent, Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Mermoux, Michel, Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Bordet, P., Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Glatzel, Pieter, European Synchrotron Radiation Facility, Grenoble, Auvergne-Rhone-Alpes, France; Ticianelli, Edson Antonio, Universidade de São Paulo, Sao Paulo, SP, Brazil; Jaouen, Frédéric, Université de Montpellier, Montpellier, Occitanie, France; Maillard, Frédéric M., Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France, Universidade de São Paulo, Sao Paulo, SP, Brazil","Precious metal-free Fe-N-C catalysts efficiently electrocatalyze the oxygen reduction reaction both in acid and alkaline electrolyte. Their stability is however limited in acidic medium, but generally accepted to be much higher in alkaline electrolyte. Herein, by combining advanced electron and X-ray based techniques, we provide comprehensive evidence of a Fe dissolution/reprecipitation mechanism, which partially transforms single Fe atoms into Fe oxide nanoparticles and Fe carbide nanoparticles into Fe carbide core@Fe oxide shell nanoparticles, and is independent on the gas atmosphere used during the accelerated stress tests. Our work shows that Fe-N-C materials based on zero-valent Fe nanoparticles should be designed so that all Fe nanoparticles are protected by a defect-free graphite shell, for improved durability. For single atom Fe-N-C catalysts, the present study raises the question of a possible synergy between minute amount of Fe oxide nanoparticles and Fe-N<inf>x</inf>C<inf>y</inf> single-atom sites, leading to the higher apparent durability of this catalyst. © 2022 Elsevier B.V.",Anion-exchange membrane fuel cell; Earth-abundant metal catalyst; Fe oxide formation; Metal-N-C catalyst; Oxygen reduction reaction,Alkaline fuel cells; Carbides; Durability; Electrolytes; Electrolytic reduction; Ion exchange membranes; Iron oxides; Nanocatalysts; Nanoparticles; Oxygen; Proton exchange membrane fuel cells (PEMFC); Alkaline electrolytes; Anion-exchange membrane fuel cells; Earth-abundant metal catalyst; Fe oxide; Fe oxide formation; Metal catalyst; Metal-N-C catalyst; Oxide formation; Oxygen reduction reaction; ]+ catalyst; Atoms,Anion-exchange membrane fuel cell;Earth-abundant metal catalyst;Fe oxide formation;Metal-N-C catalyst;Oxygen reduction reaction;Alkaline fuel cells;Carbides;Durability;Electrolytes;Electrolytic reduction;Ion exchange membranes;Iron oxides;Nanocatalysts;Nanoparticles;Oxygen;Proton exchange membrane fuel cells (PEMFC);Alkaline electrolytes;Anion-exchange membrane fuel cells;Fe oxide;Metal catalyst;Oxide formation;]+ catalyst;Atoms,"F. Maillard; Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, Grenoble, 38000, France; email: frederic.maillard@lepmi.grenoble-inp.fr",,,,,,Elsevier B.V.,09263373,,ACBEE,,English,Appl. Catal. B Environ.,Article,Scopus,,2-s2.0-85127858728,,France;Brazil,lepmi.grenoble-inp.fr,,,"Sgarbi, R.; Kumar, K.; Savel'eva, V.A.; Dubau, L.; Chattot, R.; Martin, V.; Mermoux, M.; Bordet, P.; Glatzel, P.; Ticianelli, E.A.; Jaouen, F.; Maillard, F."
"Ly, A., Murphy, E., Wang, H., Huang, Y., Ferro, G., Guo, S., Asset, T., Liu, Y., Zenyuk, I.V., Atanassov, P.",Electrochemical trends of a hybrid platinum and metal–nitrogen–carbon catalyst library for the oxygen reduction reaction,2023,EES Catalysis,2,2,d3ey00235g,624,637,,19,10.1039/d3ey00235g,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85187530333&doi=10.1039%2Fd3ey00235g&partnerID=40&md5=42d1c79b1cd8ce3d667755e37db4ab37,"Samueli School of Engineering, Irvine, CA, United States; Samueli School of Engineering, Irvine, CA, United States; Université de Strasbourg, Strasbourg, Grand Est, France","Ly, Alvin, Samueli School of Engineering, Irvine, CA, United States; Murphy, Eamonn, Samueli School of Engineering, Irvine, CA, United States; Wang, Hanson, Samueli School of Engineering, Irvine, CA, United States; Huang, Ying, Samueli School of Engineering, Irvine, CA, United States; Ferro, Giovanni, Samueli School of Engineering, Irvine, CA, United States; Guo, Shengyuan, Samueli School of Engineering, Irvine, CA, United States; Asset, Tristan, Université de Strasbourg, Strasbourg, Grand Est, France; Liu, Yuanchao, Samueli School of Engineering, Irvine, CA, United States; Zenyuk, Iryna V., Samueli School of Engineering, Irvine, CA, United States, Samueli School of Engineering, Irvine, CA, United States; Atanassov, Plamen B., Samueli School of Engineering, Irvine, CA, United States, Samueli School of Engineering, Irvine, CA, United States","Enhancing the activity and durability of Pt nanoparticles for the oxygen reduction reaction (ORR) is of critical importance in achieving an optimal, cost-efficient proton exchange membrane fuel cell (PEMFC) catalyst. Aimed at improving the intrinsic catalytic activity and durability of the Pt nanoparticles, this work utilizes a library of fourteen 3d, 4d, 5d, and f metal atomically dispersed metal–nitrogen–carbon (M–N–C) catalysts as active supports, synthesizing a corresponding library of Pt/M–N–C catalysts. XPS and XANES measurements indicate a reduced oxidation state of the Pt nanoparticles due to interactions with the M–N–C support. Further alteration of the electronic structure of the Pt nanoparticles arising from interactions with the M–N<inf>x</inf> sites is evidenced through the CO oxidation peak, which experiences broadening, shoulder formation and peak shifting over varying M–N–C supports. ORR performance reveals the significantly enhanced intrinsic catalytic activity of the Pt nanoparticles on M–N–Cs over a Pt/C standard, through specific activity calculations. This work demonstrates the application of highly active hybrid Pt/M–N–C catalysts, showcasing the variation in activity as one traverses the periodic table, while highlighting important design criteria to achieve highly active and durable ORR catalysts. © 2024 The Author(s).",,,,"P. Atanassov; Department of Materials Science and Engineering, National Fuel Cell Research Center (NFCRC), University of California-Irvine, Irvine, 92697, United States; email: plamen.atanassov@uci.edu",,,,,,Royal Society of Chemistry,,,,,English,EES Catal.,Article,Scopus,,2-s2.0-85187530333,,United States;France,uci.edu,,,"Ly, A.; Murphy, E.; Wang, H.; Huang, Y.; Ferro, G.; Guo, S.; Asset, T.; Liu, Y.; Zenyuk, I.V.; Atanassov, P."
"Gharaibeh, S.A., Birss, V.I.",Electrochemistry of Fe-Phenylenediamine Derived Cathode Catalysts Supported on Carbon,2010,ELECTRODE PROCESSES RELEVANT TO FUEL CELL TECHNOLOGY,28,23,,47,54,8,3,10.1149/1.3502336,,"[Gharaibeh, S. A.; Birss, V. I.] Univ Calgary, Dept Chem, Calgary, AB T2N 1N4, Canada",,"The primary goal of this work has been to better understand the oxygen reduction (ORR) activity of a series of Fe-N-C catalysts, formed by mixing Fe chloride with o-phenylenediamine (PDA) followed by heat treatment (HT). It is shown that, for HT at less than 500 degrees C, significant redox chemistry, typical of a o-PDA redox polymer, is revealed in fully deaerated acidic solutions. This redox chemistry disappears at higher HT temperatures, arguing that the ORR active site arises from the thermal decomposition product of the PDA surface polymer. By electrodepositing PDA, either from a solution of o-PDA or from one also containing Fe3+, followed by ORR studies, it is demonstrated that the presence of Fe in the PDA film serves to enhance the ORR activity.",,PEM FUEL-CELLS; OXYGEN REDUCTION; O-2 REDUCTION; SURFACE; IRON; ELECTROCATALYSTS; MONOMERS; GOLD,PEM FUEL-CELLS;OXYGEN REDUCTION;O-2 REDUCTION;SURFACE;IRON;ELECTROCATALYSTS;MONOMERS;GOLD,,"Birss, V; Mustain, W; Wilkinson, D; Kulesza, P; Ota, K","65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA",Symposium on Electrode Processes Relevant to Fuel Cell Technology held during the 217th Meeting of the Electrochemical-Society (ECS),"Vancouver, CANADA","APR 25-30, 2010",ELECTROCHEMICAL SOC INC,1938-5862,978-1-60768-199-1,,,English,ECS TRANSACTIONS,Proceedings Paper,WoS,Electrochemistry; Energy & Fuels,WOS:000317178800005,,Canada,No email,Univ Calgary,"Univ Calgary, Canada","Gharaibeh, S. A.; Birss, V. I."
"Zhang, B., Chen, X.J.",Electronic communication between transition metal nanoparticle and single atom: Endohedral metallofullerenes single-atom catalysts for oxygen reduction reaction catalysis,2023,COMPUTATIONAL AND THEORETICAL CHEMISTRY,1227,,114242,,,8,2,10.1016/j.comptc.2023.114242,,"[Chen, Xianjun] Key Lab Fine Chem Applicat Technol Luzhou, Luzhou 646099, Peoples R China; Sichuan Vocat Coll Chem Technol, Luzhou 646005, Peoples R China",,"Civil-used proton exchange membrane fuel cell (PEMFC) may be the potential candidate for the construction of the global new energy system including the use of hydrogen energy. Nevertheless, the cathode oxygen reduction reaction (ORR) occurs sluggishly, reining the conversion efficiency of it, which hinders the further commercialization of PEMFC. Currently, the replacement of undesirable Pt catalysts by more stable and economical catalytic materials is the main topic in the field of ORR. Herein, ferromagnetic metal-based endohedral metallofullerenes (EMFs) electrocatalyst with single-atomic shell decoration (M4@MN4C60, M = Fe, Co, Ni) are theoretically constructed and evaluated by the density functional theory method. The encapsulation energy calculation reveals that the synthesis of all EMFs requires additional external energy supply, which can explain why few successfully experimental synesis of EMFs have been reported. Among all studied catalysts, the CoN4C60 stands out with the highest ORR performance comparable to Pt, and the Fe- and Ni- based EMFs shows considerable activity enhancement after the cluster encapsulation. The electronic structure calculation reveals that the encapsulated Fe4 cluster leads to an electron accumulation around the Fe atom in active center, thereby weakening the *OH binding and enhance the ORR performance.",Oxygen reduction reaction; Density functional theory; Fullerene; Single -atom catalyst; Cluster,GRAPHENE; VEHICLE; SITES; C-60,Oxygen reduction reaction;Density functional theory;Fullerene;Single -atom catalyst;Cluster;GRAPHENE;VEHICLE;SITES;C-60,327119606@qq.com,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2210-271X,,,,English,COMPUT THEOR CHEM,Article,WoS,Chemistry,WOS:001038226900001,2-s2.0-85165106134,China,qq.com,Key Lab Fine Chem Applicat Technol Luzhou;Luzhou 646005,"Key Lab Fine Chem Applicat Technol Luzhou, China;Luzhou 646005, China","Zhang, Bo; Chen, Xianjun"
"Muuli, K., Mooste, M., Akula, S., Gudkova, V., Otsus, M., Kikas, A., Aruvali, J., Treshchalov, A., Kisand, V., Tamm, A., Krumme, A., Cavaliere, S., Tammeveski, K.",Electrospun Carbon Nanofibre-Based Catalysts Prepared with Co and Fe Phthalocyanine for Oxygen Reduction in Acidic Medium,2023,CHEMELECTROCHEM,10,17,,,,12,12,10.1002/celc.202300131,,"[Muuli, Kaur; Mooste, Marek; Akula, Srinu; Tammeveski, Kaido] Univ Tartu, Inst Chem, Ravila 14a, EE-50411 Tartu, Estonia; [Gudkova, Viktoria; Krumme, Andres] Tallinn Univ Technol, Dept Mat & Environm Technol, Ehitajate Tee 5, EE-19086 Tallinn, Estonia; [Otsus, Markus; Kikas, Arvo; Treshchalov, Alexey; Kisand, Vambola; Tamm, Aile] Univ Tartu, Inst Phys, W Ostwald Str 1, EE-50411 Tartu, Estonia; [Aruvali, Jaan] Univ Tartu, Inst Ecol & Earth Sci, Vanemuise 46, EE-51014 Tartu, Estonia; [Cavaliere, Sara] Univ Montpellier, ENSCM, CNRS, ICGM, Montpellier, France",,"A Pt-free cathode catalyst is necessary for proton-exchange membrane fuel cell (PEMFC) to enable the widespread use of these environmentally friendly energy conversion devices at affordable price. Herein, a pyrolyzed electrospun carbon nanofibre (CNF) catalyst is prepared embedded with cobalt(II) phthalocyanine and iron(II) phthalocyanine compounds to provide the transition metal N-4-macrocyclic complex-derived sites (MNX) possessing better electrocatalytic oxygen reduction reaction (ORR) activity. The physical characterisation showed the nanofibrous structure of catalyst with rough surface texture and considerable amount of N, Fe, and Co. The D-MN4-CNF-IL-A catalyst prepared using ionic liquid as a porogen displayed the best electrocatalytic activity for O-2 electroreduction proceeding via 4e(-) pathway in 0.5 M H2SO4 electrolyte solution with the ORR onset and half-wave potential of 0.83 and 0.71 V vs reversible hydrogen electrode (RHE), respectively.",carbon nanofibres; electrospinning; non-precious metal catalyst; oxygen reduction reaction; proton-exchange membrane fuel cell,STYRENE-ACRYLONITRILE COPOLYMER; METAL-ORGANIC FRAMEWORK; CATHODE CATALYSTS; HIGH-PERFORMANCE; NANOTUBE COMPOSITES; TRANSITION-METAL; NITROGEN; ELECTROCATALYSTS; EFFICIENT; SITES,carbon nanofibres;electrospinning;non-precious metal catalyst;oxygen reduction reaction;proton-exchange membrane fuel cell;STYRENE-ACRYLONITRILE COPOLYMER;METAL-ORGANIC FRAMEWORK;CATHODE CATALYSTS;HIGH-PERFORMANCE;NANOTUBE COMPOSITES;TRANSITION-METAL;NITROGEN;ELECTROCATALYSTS;EFFICIENT;SITES,kaido.tammeveski@ut.ee,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,2196-0216,,,,English,CHEMELECTROCHEM,Article,WoS,Electrochemistry,WOS:001027621600001,2-s2.0-85164776204,Estonia;France,ut.ee,Univ Tartu;Tallinn Univ Technol;Univ Montpellier,"Univ Tartu, Estonia;Tallinn Univ Technol, Estonia;Univ Montpellier, France","Muuli, Kaur; Mooste, Marek; Akula, Srinu; Gudkova, Viktoria; Otsus, Markus; Kikas, Arvo; Aruvali, Jaan; Treshchalov, Alexey; Kisand, Vambola; Tamm, Aile; Krumme, Andres; Cavaliere, Sara; Tammeveski, Kaido"
"Zamani, P., Higgins, D., Hassan, F., Jiang, G.P., Wu, J., Abureden, S., Chen, Z.W.",Electrospun Iron-Polyaniline-Polyacrylonitrile Derived Nanofibers as Non-Precious Oxygen Reduction Reaction Catalysts for PEM Fuel Cells,2014,ELECTROCHIMICA ACTA,139,,,111,116,6,74,10.1016/j.electacta.2014.07.007,,"[Zamani, Pouyan; Higgins, Drew; Hassan, Fathy; Jiang, Gaopeng; Wu, Jason; Abureden, Salah; Chen, Zhongwei] Univ Waterloo, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada",,"Replacing high cost platinum (Pt) catalysts with alternative non-precious materials for the oxygen reduction reaction (ORR) is highly desirable to reduce the cost of polymer electrolyte membrane fuel cell (PEMFC) systems. Transition metal-nitrogen-carbon complexes (M-N-C) prepared by high temperature heat treatment techniques are the most promising class of non-precious materials with respect to ORR activity and stability. In this work, one-dimensional nanofibers are prepared by electrospinning an iron-polyaniline/polyacrylonitrile (Fe-PANI-PAN) metal-polymer blend, followed by subsequent heat treatment. This represents the first time a blend of polymers (PANI-PAN) has been used to prepare M-N-C nanofiber catalysts via electrospinning. The addition of 10 wt. % PANI to the electrospinning mixture provides 100 and 70 mV improvements to the ORR onset potential and half-wave potential, respectively, rendering the most active non-precious ORR nanofiber catalysts prepared by electrospinning to date. The high activity is attributed to the porous structure of the nanofibers, combined with increased nitrogen contents provided by the PANI incorporation. (C) 2014 Elsevier Ltd. All rights reserved.",Oxygen Reduction Reaction; Non-precious catalyst; PEM fuel cell; lron-polyaniline-polyacrylonitrile blend; Electrospun nanofiber,CATHODE CATALYSTS; ELECTROCATALYTIC ACTIVITY; CARBON NANOFIBERS; SUPPORTED PLATINUM; NANOTUBES; COBALT; MEDIA,Oxygen Reduction Reaction;Non-precious catalyst;PEM fuel cell;lron-polyaniline-polyacrylonitrile blend;Electrospun nanofiber;CATHODE CATALYSTS;ELECTROCATALYTIC ACTIVITY;CARBON NANOFIBERS;SUPPORTED PLATINUM;NANOTUBES;COBALT;MEDIA,zhwchen@uwaterloo.ca,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000342275200017,2-s2.0-84905002577,Canada,uwaterloo.ca,Univ Waterloo,"Univ Waterloo, Canada","Zamani, Pouyan; Higgins, Drew; Hassan, Fathy; Jiang, Gaopeng; Wu, Jason; Abureden, Salah; Chen, Zhongwei"
"Cui, J.Y., Min, J.Y., Wang, H., Shui, J.L., Peng, L.S., Kang, Z.Y., Liu, J.Y., Chen, Q.J., Bai, S., Liu, Y.R.",Elongated Fe-N-C containing trace atomic Co dopants for high power density PEMFCs,2024,INDUSTRIAL CHEMISTRY & MATERIALS,2,4,,634,643,10,2,10.1039/d4im00043a,,"[Cui, Jiayao; Min, Junyong; Wang, Hao; Bai, Shuo; Liu, Yanrong] Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, State Key Lab Mesosci & Engn,Beijing Key Lab Ion L, Beijing 100190, Peoples R China; [Cui, Jiayao; Liu, Yanrong] Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China; [Wang, Hao; Liu, Yanrong] Henan Univ, Zhengzhou Inst Emerging Ind Technol, Longzihu New Energy Lab, Zhengzhou 450000, Peoples R China; [Shui, Jianglan; Liu, Jieyuan] Beihang Univ, Sch Mat Sci & Engn, Beijing, Peoples R China; [Peng, Lishan; Chen, Qingjun] Chinese Acad Sci, Ganjiang Innovat Acad, Ganzhou 341000, Peoples R China; [Kang, Zhenye] Hainan Univ, Sch Chem Engn & Technol, Hainan Prov Key Lab Fine Chem, State Key Lab Marine Resource Utilizat South China, Haikou 570228, Peoples R China",,"Developing single-atom Fe-N4/C catalysts is crucial for the large-scale implementation of proton exchange membrane fuel cells (PEMFCs). While Fe-N4/C catalysts are inherently active in accelerating the slow ORR process, their performance is still inferior to that of Pt/C. Herein, a trace Co-doped Fe single-atom catalyst (Fe(tCo)-N-C) containing more active Fe2N8 sites has been synthesized. Interestingly, compared with typical FeN4 sites in an Fe-N-C electrocatalyst, the Fe2N8 sites generate a larger Fe-N bond length due to Co-doping. The elongated Fe-N bond in Fe2N8 lowers the d-band center and charge density of iron sites, enhancing the ORR process by facilitating the formation of *OOH and generation and desorption of *OH. Fe(tCo)-N-C manifested excellent acidic and alkaline ORR activity, with a half-wave potential (E1/2) of 0.80 V in HClO4 solution and 0.89 V in KOH medium. More importantly, high peak power densities (Pmax) were realized by applying Fe(tCo)-N-C in PEMFCs, with the Pmax reaching 890 mW cm-2 in H2-O2 and 380 mW cm-2 in H2-air. Additionally, trace Co dopants in the catalyst improved carbon graphitization and provided high ORR catalytic stability. This research introduces an innovative approach to engineering highly active Fe2N8 sites, providing valuable insights for the sustainable progress of PEMFC technology.Keywords: Proton exchange membrane fuel cells; Oxygen reduction reaction; Platinum-group-metal-free catalysts; Single-atom catalysts; Bimetallic active sites.",,CATALYSTS; PERFORMANCE; SITES,CATALYSTS;PERFORMANCE;SITES,haowang@ipe.ac.cn; qjchen@ipe.ac.cn; yrliu@ipe.ac.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2755-2608,,,,English,IND CHEM MATER,Article,WoS,Engineering; Materials Science,WOS:001362853600001,,China,ipe.ac.cn,Chinese Acad Sci;Univ Chinese Acad Sci;Henan Univ;Beihang Univ;Hainan Univ,"Chinese Acad Sci, China;Univ Chinese Acad Sci, China;Henan Univ, China;Beihang Univ, China;Hainan Univ, China","Cui, Jiayao; Min, Junyong; Wang, Hao; Shui, Jianglan; Peng, Lishan; Kang, Zhenye; Liu, Jieyuan; Chen, Qingjun; Bai, Shuo; Liu, Yanrong"
"Wang, H., Osmieri, L., Yu, H.R., Zachman, M.J., Park, J.H., Kariuki, N.N., Cetinbas, F.C., Khandavalli, S., Mauger, S., Myers, D.J., Cullen, D.A., Neyerlin, K.C.",Elucidating the impact of the ionomer equivalent weight on a platinum group metal-free PEMFC cathode via oxygen limiting current,2023,SUSMAT,3,1,,72,90,19,11,10.1002/sus2.106,,"[Wang, Hao; Osmieri, Luigi; Khandavalli, Sunilkumar; Mauger, Scott; Neyerlin, Kenneth C.] Natl Renewable Energy Lab, Chem & Nanosci Ctr, Golden, CO 80401 USA; [Yu, Haoran; Zachman, Michael J.; Cullen, David A.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN USA; [Park, Jae Hyung; Kariuki, Nancy N.; Myers, Deborah J.] Argonne Natl Lab, Chem Sci & Engn Div, Lemont, IL USA; [Cetinbas, Firat C.] Argonne Natl Lab, Nucl Sci & Engn Div, Lemont, IL USA",,"Leveraging the interactions between ionomer and catalyst can increase the performance of proton exchange membrane fuel cells. The impacts of the equivalent weight (EW) of perfluorosulfonic acid-based ionomers on the platinum group metal-free electrode structure and fuel cell performance have not been fully explored. Four membrane electrode assemblies (MEAs) were prepared by using a commercial Fe-N-C catalyst, two perfluorosulfonic acid ionomers with different EWs, that is, Aquivion 720 (A720) and Nafion 1100 (N1100), and two ionomer-to-catalyst (I/C) ratios. The four MEAs were characterized to understand the impact of the ionomer EW and content on the capacitance, proton conductivity, and mass transport on the cathode. The mass transport resistance was measured for the first time using a new oxygen reduction reaction limiting current method enabling to couple the effects of oxygen diffusion with liquid water generation. Low EW ionomer combined with a moderate I/C results in improved performance due to its enhanced proton conductivity. However, when used at high I/C, it can cause severe water flooding at high current density due to the enhanced liquid water uptake, especially at high relative humidity, resulting in lower catalyst utilization and higher mass transport resistance.",ionomer equivalent weight; limiting current; mass transport; oxygen reduction reaction; PGM-free catalyst; proton exchange membrane fuel cell,PERFLUOROSULFONIC ACID IONOMERS; FUEL-CELL PERFORMANCE; REDUCTION ACTIVITY; FREE CATALYSTS; ORR; MODEL; IRON,ionomer equivalent weight;limiting current;mass transport;oxygen reduction reaction;PGM-free catalyst;proton exchange membrane fuel cell;PERFLUOROSULFONIC ACID IONOMERS;FUEL-CELL PERFORMANCE;REDUCTION ACTIVITY;FREE CATALYSTS;ORR;MODEL;IRON,losmieri@lanl.gov; kenneth.neyerlin@nrel.gov,,"111 RIVER ST, HOBOKEN 07030-5774, NJ USA",,,,WILEY,2766-8479,,,,English,SUSMAT,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science,WOS:000903761100001,,United States,lanl.gov,Natl Renewable Energy Lab;Oak Ridge Natl Lab;Argonne Natl Lab,"Natl Renewable Energy Lab, United States;Oak Ridge Natl Lab, United States;Argonne Natl Lab, United States","Wang, Hao; Osmieri, Luigi; Yu, Haoran; Zachman, Michael J.; Park, Jae Hyung; Kariuki, Nancy N.; Cetinbas, Firat C.; Khandavalli, Sunilkumar; Mauger, Scott; Myers, Deborah J.; Cullen, David A.; Neyerlin, Kenneth C."
"Sudarsono, W., Wong, W.Y., Loh, K.S., Kok, K.Y., Syarif, N., Abidin, A.F.Z., Hamada, I.",Elucidating the roles of the Fe-Nx active sites and pore characteristics on Fe-Pani-biomass-derived RGO as oxygen reduction catalysts in PEMFCs,2022,Materials Research Bulletin,145,,111526,,,,13,10.1016/j.materresbull.2021.111526,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85113323819&doi=10.1016%2Fj.materresbull.2021.111526&partnerID=40&md5=181cc52dc286dd39051ea4e6c7478733,"Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia; Agensi Nuklear Malaysia, Bangi, Selangor, Malaysia; Department of Chemistry, Universitas Sriwijaya, Indralaya, South Sumatra, Indonesia; Department of Precision Engineering, The University of Osaka, Suita, Osaka, Japan","Sudarsono, Wulandhari, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia; Wong, W. Y., Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia; Loh, Kee Shyuan, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia; Kok, Kuanying, Agensi Nuklear Malaysia, Bangi, Selangor, Malaysia; Syarif, Nirwan, Department of Chemistry, Universitas Sriwijaya, Indralaya, South Sumatra, Indonesia; Abidin, Azim Fitri Zainul, Department of Precision Engineering, The University of Osaka, Suita, Osaka, Japan; Hamada, Ikutaro, Department of Precision Engineering, The University of Osaka, Suita, Osaka, Japan","Pyrolysed Fe-N-C catalysts are foreseen to be promising noble-free cathode catalysts for proton exchange membrane fuel cells. Nevertheless, efforts are required to overcome active site degradation, which is influenced by the meso/macroporous composition of the catalyst and support. Reduced graphene oxide from Sengon wood is seen as a potential support for Fe-polyaniline (Pani) catalysts due to its hierarchical porous structure that depends on N/C ratio. This work reveals that the Fe-N<inf>4</inf> moiety serves as the active site, which is confirmed by XPS and first-principles calculations. Fe-Pani-RGO 2:0.2, with the highest content of Fe-N<inf>4</inf> and specific surface area, results in the highest ORR activity with E<inf>onset</inf> =0.84 V, E<inf>1/</inf><inf>2</inf> = 0.79 V, and J<inf>D</inf> = 5.5 mA/cm2. Although micropores are important for hosting the active sites that contribute to high ORR activity, in regard to single-cell performance, the role of meso‑/macropores is crucial for achieving higher overall performance. © 2021",biomass RGO; Fe-Pani-RGO; noble-free; ORR activity; pore characteristics,Calculations; Catalyst activity; Catalyst supports; Electrolytic reduction; Graphene; Iron compounds; Oxygen; Polyaniline; Proton exchange membrane fuel cells (PEMFC); Active pores; Active site; Biomass RGO; Fe-fe-polyaniline-RGO; Noble-free; ORR activity; Oxygen reduction catalysts; Pore characteristics; Site characteristics; ]+ catalyst; Biomass,biomass RGO;Fe-Pani-RGO;noble-free;ORR activity;pore characteristics;Calculations;Catalyst activity;Catalyst supports;Electrolytic reduction;Graphene;Iron compounds;Oxygen;Polyaniline;Proton exchange membrane fuel cells (PEMFC);Active pores;Active site;Fe-fe-polyaniline-RGO;Oxygen reduction catalysts;Site characteristics;]+ catalyst;Biomass,"W.Y. Wong; Fuel Cell Institute, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Malaysia; email: waiyin.wong@ukm.edu.my",,,,,,Elsevier Ltd,00255408,,MRBUA,,English,Mater Res Bull,Article,Scopus,,2-s2.0-85113323819,,Malaysia;Indonesia;Japan,ukm.edu.my,,,"Sudarsono, W.; Wong, W.Y.; Loh, K.S.; Kok, K.-Y.; Syarif, N.; Abidin, A.F.Z.; Hamada, I."
"Osmieri, L., Ahluwalia, R.K., Wang, X., Chung, H.T., Yin, X., Kropf, A.J., Park, J.H., Cullen, D.A., More, K.L., Zelenay, P., Myers, D.J., Neyerlin, K.C.",Elucidation of Fe-N-C electrocatalyst active site functionality via in-situ X-ray absorption and operando determination of oxygen reduction reaction kinetics in a PEFC,2019,Applied Catalysis B: Environmental,257,,117929,,,,72,10.1016/j.apcatb.2019.117929,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85068939530&doi=10.1016%2Fj.apcatb.2019.117929&partnerID=40&md5=54c8994263881c6019f5b21b3d023a5e,"National Renewable Energy Laboratory, Golden, CO, United States; Argonne National Laboratory, Lemont, IL, United States; Los Alamos National Laboratory, Los Alamos, NM, United States; Oak Ridge National Laboratory, Oak Ridge, TN, United States","Osmieri, Luigi, National Renewable Energy Laboratory, Golden, CO, United States; Ahluwalia, Rajesh K., Argonne National Laboratory, Lemont, IL, United States; Wang, Xiaohua, Argonne National Laboratory, Lemont, IL, United States; Chung, Hoon Taek, Los Alamos National Laboratory, Los Alamos, NM, United States; Yin, Xi, Los Alamos National Laboratory, Los Alamos, NM, United States; Kropf, Arthur Jeremy, Argonne National Laboratory, Lemont, IL, United States; Park, Jaehyung, Argonne National Laboratory, Lemont, IL, United States; Cullen, David A., Oak Ridge National Laboratory, Oak Ridge, TN, United States; More, Karren L., Oak Ridge National Laboratory, Oak Ridge, TN, United States; Zelenay, Piotr S., Los Alamos National Laboratory, Los Alamos, NM, United States; Myers, Deborah J., Argonne National Laboratory, Lemont, IL, United States; Neyerlin, Kenneth C., National Renewable Energy Laboratory, Golden, CO, United States","In the past decade the notable effort placed on improving intrinsic electrochemical kinetics of platinum group metal (PGM)-free electrocatalysts for the oxygen reduction reaction (ORR) has led to a significant improvement in both performance and understanding of this class of electrocatalysts. However, a limited amount of this development and understanding has been undertaken using operando electrochemical diagnostics at the membrane electrode assembly (MEA) level. In this work, the operando ORR kinetics on an atomically dispersed iron-nitrogen-carbon ((AD)Fe-N-C) PGM-free electrocatalyst have been examined to extract the reaction order and the activation energy of the ORR. The experiments were carefully designed to ensure the stability/predictability of the electrocatalyst during the data collection process and thus validate the relevance of the values obtained for the aforementioned parameters. A kinetic model that considers a potential-dependent availability of active sites (θ) is proposed. Active site availability is shown to be a function of both the change in the oxidation state (n<inf>R</inf>) and the redox potential at which the metal center transitions from a higher oxidation state to a lower one The resulting model fitting parameters for n<inf>R</inf> and (0.71 and 0.788 V, respectively) obtained from the analysis of operando data correlate well with those from in situ X-ray absorption near edge structure measurements (n<inf>R</inf> = 0.57) and in situ cyclic voltammetry measurements (0.75 V < < 0.8 V) in the MEA environment. The resulting model provides an excellent fit of MEA performance across the range of pressures, temperatures, and potentials under which the data were collected. © 2019",Activation energy; Fe-N-C catalyst; Modeling; Polymer electrolyte fuel cell; Reaction order,Activation energy; Cyclic voltammetry; Electrocatalysts; Electrolytic reduction; Iron compounds; Kinetics; Models; Oxygen; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Reaction kinetics; Redox reactions; X ray absorption; X ray absorption near edge structure spectroscopy; Data collection process; Electrochemical kinetics; Membrane electrode assemblies; Platinum group metals; Polymer electrolyte fuel cells; Potential-dependent; Reaction orders; Voltammetry measurements; Oxygen reduction reaction,Activation energy;Fe-N-C catalyst;Modeling;Polymer electrolyte fuel cell;Reaction order;Cyclic voltammetry;Electrocatalysts;Electrolytic reduction;Iron compounds;Kinetics;Models;Oxygen;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Reaction kinetics;Redox reactions;X ray absorption;X ray absorption near edge structure spectroscopy;Data collection process;Electrochemical kinetics;Membrane electrode assemblies;Platinum group metals;Polymer electrolyte fuel cells;Potential-dependent;Reaction orders;Voltammetry measurements;Oxygen reduction reaction,"K.C. Neyerlin; National Renewable Energy Laboratory, Golden, 80401, United States; email: kenneth.neyerlin@nrel.gov",,,,,,Elsevier B.V.,09263373,,ACBEE,,English,Appl. Catal. B Environ.,Article,Scopus,,2-s2.0-85068939530,,United States,nrel.gov,,,"Osmieri, L.; Ahluwalia, R.K.; Wang, X.; Chung, H.T.; Yin, X.; Kropf, A.J.; Park, J.H.; Cullen, D.A.; More, K.L.; Zelenay, P.; Myers, D.J.; Neyerlin, K.C."
"Zhong, L., Hu, Y., Cleemann, L.N., Pan, C., Svaerke, J., Jensen, J.O., Li, Q.",Encapsulated iron-based oxygen reduction electrocatalysts by high pressure pyrolysis,2017,International Journal of Hydrogen Energy,42,36,,22887,22896,,9,10.1016/j.ijhydene.2017.07.093,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85027123580&doi=10.1016%2Fj.ijhydene.2017.07.093&partnerID=40&md5=1eef5fa294069c20d8af8ca34e4eba59,"Department of Energy Conversion and Storage, Technical University of Denmark, Lyngby, Hovedstaden, Denmark","Zhong, Lijie, Department of Energy Conversion and Storage, Technical University of Denmark, Lyngby, Hovedstaden, Denmark; Hu, Yang, Department of Energy Conversion and Storage, Technical University of Denmark, Lyngby, Hovedstaden, Denmark; Cleemann, Lars Nilausen, Department of Energy Conversion and Storage, Technical University of Denmark, Lyngby, Hovedstaden, Denmark; Pan, Chao, Department of Energy Conversion and Storage, Technical University of Denmark, Lyngby, Hovedstaden, Denmark; Sværke, Jakob, Department of Energy Conversion and Storage, Technical University of Denmark, Lyngby, Hovedstaden, Denmark; Jensen, Jens Oluf, Department of Energy Conversion and Storage, Technical University of Denmark, Lyngby, Hovedstaden, Denmark; Li, Qingfeng, Department of Energy Conversion and Storage, Technical University of Denmark, Lyngby, Hovedstaden, Denmark","Non-precious metal catalysts (NPMCs) are candidate materials to replace platinum for proton exchange membrane fuel cells (PEMFCs). Herein we reported a type of iron-based NPMCs prepared by high pressure pyrolysis for the oxygen reduction reaction (ORR) in acidic media. The catalysts are in form of carbon microspheres in a sub-microscale consisting of iron-containing nanoparticles encapsulated by graphitic layers. By tailoring temperatures and duration of pyrolysis, the best ORR catalyst was achieved at 700 °C and 75 min, which exhibits an onset potential of 0.85 V at 0.1 mA cm−2 and a half-wave potential of 0.72 V in acid media. After 10,000 potential cycles, only 25 mV shift of half-wave potential is observed showing excellent stability. An analogue material prepared from nitrogen-free precursors shows significant electrochemical activity though it is much lower than that from the nitrogen containing precursors and can be improved by post treatment in ammonia. These results indicate the contribution to the catalysis from surface nitrogen functionalities and encapsulated metal-containing nanoparticles. © 2017 Hydrogen Energy Publications LLC",Encapsulated structure; Fuel cells; High-pressure pyrolysis; Non-precious metal catalysts; Oxygen reduction reaction,Ammonia; Electrocatalysts; Electrolysis; Electrolytic reduction; Fuel cells; Iron; Metal nanoparticles; Nitrogen; Oxygen; Oxygen reduction reaction; Precious metals; Pyrolysis; Candidate materials; Carbon microspheres; Electrochemical activities; Half-wave potential; High pressure; Metal-containing nanoparticles; Non-precious metal catalysts; Proton exchange membrane fuel cell (PEMFCs); Proton exchange membrane fuel cells (PEMFC),Encapsulated structure;Fuel cells;High-pressure pyrolysis;Non-precious metal catalysts;Oxygen reduction reaction;Ammonia;Electrocatalysts;Electrolysis;Electrolytic reduction;Iron;Metal nanoparticles;Nitrogen;Oxygen;Precious metals;Pyrolysis;Candidate materials;Carbon microspheres;Electrochemical activities;Half-wave potential;High pressure;Metal-containing nanoparticles;Proton exchange membrane fuel cell (PEMFCs);Proton exchange membrane fuel cells (PEMFC),"Q. Li; Department of Energy Conversion and Storage, Technical University of Denmark, Kemitorvet B207, Kgs. Lyngby, DK-2800, Denmark; email: qfli@dtu.dk",,,,,,Elsevier Ltd,03603199,0080311393,IJHED,,English,Int J Hydrogen Energy,Article,Scopus,,2-s2.0-85027123580,,Denmark,dtu.dk,,,"Zhong, L.; Hu, Y.; Cleemann, L.N.; Pan, C.; Svaerke, J.; Jensen, J.O.; Li, Q."
"Glibin, V.P., Dodelet, J.P., Zhang, G.X.",Energetics and thermodynamic stability of potential F(II)-hexa-aza-active sites for O2 reduction in PEM fuel cells,2022,SUSMAT,2,6,,731,748,18,10,10.1002/sus2.94,,"[Glibin, Vassili P.] Univ Western Ontario, Dept Chem & Biochem Engn, London, ON N6A 5B9, Canada; [Dodelet, Jean-Pol; Zhang, Gaixia] Inst Natl Rech Sci INRS, Energie Mat Telecommun Res Ctr, Varennes, PQ J3X 1P7, Canada; [Zhang, Gaixia] Ecole Technol Super ETS, Dept Elect Engn, 1100 Rue Notre Dame Ouest, Montreal, PQ H3C 1K3, Canada",,"We present here a thermodynamic assessment of the stability behavior in acid environment at 298 and 353 K (80 degrees C) of two iron (II) hexa-aza-macrocyclic complexes and of an hexa-aza-iron-based site ((FeN(4+2))-N-II/C) that should potentially be active for the oxygen reduction reaction in proton exchange membrane (PEM) fuel cells. The calculations of the equilibrium constant (K-c) for the demetallation reaction indicate that the iron (II)-hexa-aza-macrocyclic complexes and (FeN(4+2))-N-II/C are chemically stable in an acid medium at 298 and 353 K. Compared with two other potential model sites ((FeN4)-N-II/C and (FeN(2+2))-N-II/C that were thought to be present in the same Fe-based catalysts, K-c of (FeN(4+2))-N-II/C is two to three orders of magnitude smaller at 353 K, and three to four orders of magnitude smaller at 298 K, than K-c for (FeN4)-N-II/C or (FeN(2+2))-N-II/C, revealing the great chemical stability of (FeN(4+2))-N-II. In this work, we discuss about a novel proposition that the two catalytic sites active in these Fe-based catalysts are (FeN4)-N-II/C and (FeN(4+2))-N-II/C. This proposition is in agreement with the durability behavior of these catalysts in PEM fuel cells and also with their known physico-chemical characterizations. The origin of the fast and slow decay behaviors of the different sites, which are active at the Fe-N-C-based cathode of PEM fuel cells, is also discussed.",active site; fuel cell; oxygen reduction reaction; thermodynamic stability,OXYGEN REDUCTION; ORBITAL ELECTRONEGATIVITY; CATALYTIC SITES; ATOMIC CHARGES; ACTIVE-SITES; CARBON; EQUALIZATION; COMPLEXES; DENSITY; ELECTROCATALYSTS,active site;fuel cell;oxygen reduction reaction;thermodynamic stability;OXYGEN REDUCTION;ORBITAL ELECTRONEGATIVITY;CATALYTIC SITES;ATOMIC CHARGES;ACTIVE-SITES;CARBON;EQUALIZATION;COMPLEXES;DENSITY;ELECTROCATALYSTS,vassili.glibin@gmail.com; jean-pol.dodelet@inrs.ca; gaixia.zhang@etsmtl.ca,,"111 RIVER ST, HOBOKEN 07030-5774, NJ USA",,,,WILEY,2766-8479,,,,English,SUSMAT,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science,WOS:000888433200001,,Canada,gmail.com,Univ Western Ontario;Inst Natl Rech Sci INRS;Ecole Technol Super ETS,"Univ Western Ontario, Canada;Inst Natl Rech Sci INRS, Canada;Ecole Technol Super ETS, Canada","Glibin, Vassili P.; Dodelet, Jean-Pol; Zhang, Gaixia"
"Fu, X.G., Hassan, F.M., Zamani, P., Jiang, G.P., Higgins, D.C., Choi, J.Y., Wang, X.L., Xu, P., Liu, Y.R., Chen, Z.W.",Engineered architecture of nitrogenous graphene encapsulating porous carbon with nano-channel reactors enhancing the PEM fuel cell performance,2017,NANO ENERGY,42,,,249,256,8,45,10.1016/j.nanoen.2017.10.051,,"[Fu, Xiaogang; Hassan, Fathy M.; Zamani, Pouyan; Jiang, Gaopeng; Higgins, Drew C.; Choi, Ja-Yeon; Wang, Xiaolei; Xu, Pan; Liu, Yanru; Chen, Zhongwei] Univ Waterloo, Dept Chem Engn, 200 Univ Ave W, Waterloo, ON N2L 3G1, Canada; [Higgins, Drew C.] Stanford Univ, Shriram Ctr, Dept Chem Engn, 443 Via Ortega, Stanford, CA 94305 USA",,"Nanoscale architecturing of platinum group metal-free (PGM-free) electrocatalysts is expected to dramatically improve the overall catalytic performance for oxygen reduction reaction (ORR). Desired structures and morphologies for boosting active site density and enhancing mass and charge transfer are essential for developing next-generation PGM-free electrocatalysts. Herein, we report the design of a M-N-C type catalyst consisting of 3-dimensional graphitic meso-porous carbon spheres wrapped with 2-dimensional graphenized sheets. This heterostructure comprises resultant large electroactive surface area, abundant pore channels, and tuned chemical structures, which provide improved electrocatalytic performance. Meanwhile, these pore structures can be regarded as nano-channel reactors to catalyze ORR with easily accessible active sites, effective mass transfer, and smooth charge transfer. The obtained catalyst delivers a high maximum power density of 0.83 W cm(-2) in a single H-2-O-2 fuel cell measurement, ranking it as one of the most promising PGM-free catalysts in proton exchange membrane fuel cells (PEMFCs). Moreover, reasonable fuel cell stability was also observed through accelerated degradation testing. This work provides a new avenue for PGM-free catalysts design that can be a step towards practical commercial of PEMFCs.",In-situ graphene; Porous carbon spheres; Oxygen reduction reaction; Catalyst; Fuel cells,OXYGEN-REDUCTION CATALYSTS; SULFUR-DOPED GRAPHENE; METAL ELECTROCATALYSTS; O-2 ELECTROREDUCTION; FE/N/C CATALYSTS; ACTIVE-SITES; PLATINUM; POLYMER; IRON; POLYANILINE,In-situ graphene;Porous carbon spheres;Oxygen reduction reaction;Catalyst;Fuel cells;OXYGEN-REDUCTION CATALYSTS;SULFUR-DOPED GRAPHENE;METAL ELECTROCATALYSTS;O-2 ELECTROREDUCTION;FE/N/C CATALYSTS;ACTIVE-SITES;PLATINUM;POLYMER;IRON;POLYANILINE,zhwchen@uwaterloo.ca,,"PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS",,,,ELSEVIER SCIENCE BV,2211-2855,,,,English,NANO ENERGY,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000418344200030,2-s2.0-85032935524,Canada;United States,uwaterloo.ca,Univ Waterloo;Stanford Univ,"Univ Waterloo, Canada;Stanford Univ, United States","Fu, Xiaogang; Hassan, Fathy M.; Zamani, Pouyan; Jiang, Gaopeng; Higgins, Drew C.; Choi, Ja-Yeon; Wang, Xiaolei; Xu, Pan; Liu, Yanru; Chen, Zhongwei"
"Ding, S.C., Barr, J.A., Shi, Q.R., Zeng, Y.C., Tieu, P., Lyu, Z., Fang, L.Z., Li, T., Pan, X.Q., Beckman, S.P., Du, D., Lin, H.F., Li, J.C., Wu, G., Lin, Y.H.",Engineering Atomic Single Metal-FeN4Cl Sites with Enhanced Oxygen-Reduction Activity for High-Performance Proton Exchange Membrane Fuel Cells,2022,ACS NANO,,,,,,10,145,10.1021/acsnano.2c06459,,"[Ding, Shichao; Barr, Jordan Alysia; Lyu, Zhaoyuan; Beckman, Scott P.; Du, Dan; Li, Jin-Cheng; Lin, Yuehe] Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA; [Shi, Qiurong; Zeng, Yachao; Wu, Gang] SUNY Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA; [Tieu, Peter] Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA; [Fang, Lingzhe; Li, Tao] Northern Illinois Univ, Dept Chem & Biochem, De Kalb, IL 60115 USA; [Pan, Xiaoqing] Univ Calif Irvine, Irvine Mat Res Inst IMRI, Irvine, CA 92697 USA; [Li, Tao] Argonne Natl Lab, Xray Sci Div, Lemont, IL 60439 USA; [Lin, Hongfei] Washington State Univ, Voiland Sch Chem Engn & Bioengn, Pullman, WA 99164 USA",,"Fe-N-C single-atomic metal site catalysts (SACs) have garnered tremendous interest in the oxygen reduction reaction (ORR) to substitute Pt-based catalysts in proton exchange membrane fuel cells. Nowadays, efforts have been devoted to modulating the electronic structure of metal single-atomic sites for enhancing the catalytic activities of Fe- N-C SACs, like doping heteroatoms to modulate the electronic structure of the Fe-N-x active center. However, most strategies use uncontrolled long-range interactions with heteroatoms on the Fe-N-x substrate, and thus the effect may not precisely control near-range coordinated interactions. Herein, the chlorine (Cl) is used to adjust the Fe-N-x active center via a near-range coordinated interaction. The synthesized FeN4Cl SAC likely contains the FeN4Cl active sites in the carbon matrix. The additional Fe-Cl coordination improves the instrinsic ORR activity compared with normal FeNx SAC, evidenced by density functional theory calculations, the measured ORR half-wave potential (E-1/2, 0.818 V), and excellent membrane electrode assembly performance.",Fe-N-C; single-atom catalysts; heteroatoms; fuel cells; oxygen reduction,NITROGEN-DOPED CARBON; ELECTROCATALYSTS; CATALYSTS; COORDINATION; NANOWIRES; SURFACE,Fe-N-C;single-atom catalysts;heteroatoms;fuel cells;oxygen reduction;NITROGEN-DOPED CARBON;ELECTROCATALYSTS;CATALYSTS;COORDINATION;NANOWIRES;SURFACE,jin-cheng.li@wsu.edu; gangwu@buffalo.edu; yuehe.lin@wsu.edu,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1936-0851,,,36094168,English,ACS NANO,Article; Early Access,WoS,Chemistry; Science & Technology - Other Topics; Materials Science,WOS:000859016300001,2-s2.0-85138821882,United States,wsu.edu,Washington State Univ;SUNY Buffalo;Univ Calif Irvine;Northern Illinois Univ;Argonne Natl Lab,"Washington State Univ, United States;SUNY Buffalo, United States;Univ Calif Irvine, United States;Northern Illinois Univ, United States;Argonne Natl Lab, United States","Ding, Shichao; Barr, Jordan Alysia; Shi, Qiurong; Zeng, Yachao; Tieu, Peter; Lyu, Zhaoyuan; Fang, Lingzhe; Li, Tao; Pan, Xiaoqing; Beckman, Scott P.; Du, Dan; Lin, Hongfei; Li, Jin-Cheng; Wu, Gang; Lin, Yuehe"
"Wang, H., Yin, F.X., Liu, N., Kou, R.H., He, X.B., Sun, C.J., Chen, B.H., Liu, D.J., Yin, H.Q.",Engineering Fe–Fe3C@Fe–N–C Active Sites and Hybrid Structures from Dual Metal–Organic Frameworks for Oxygen Reduction Reaction in H2–O2 Fuel Cell and Li–O2 Battery,2019,Advanced Functional Materials,29,23,1901531,,,,212,10.1002/adfm.201901531,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85063984460&doi=10.1002%2Fadfm.201901531&partnerID=40&md5=f3f65824dc724a3d9019bfc07184c2d5,"College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, China; Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, Jiangsu, China; Changzhou Institute of Advanced Materials, Beijing University of Chemical Technology, Beijing, China; College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, China; X-ray Science Division, The Advanced Photon Source, Lemont, IL, United States; Key Laboratory of Advanced Reactor Engineering and Safety, Tsinghua University, Beijing, China","Wang, Hao, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, China, Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Yin, Fengxiang, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, Jiangsu, China, Changzhou Institute of Advanced Materials, Beijing University of Chemical Technology, Beijing, China; Liu, Ning, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, China; Kou, Ronghui, X-ray Science Division, The Advanced Photon Source, Lemont, IL, United States; He, Xiaobo, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, Jiangsu, China, Changzhou Institute of Advanced Materials, Beijing University of Chemical Technology, Beijing, China; Sun, Chengjun, X-ray Science Division, The Advanced Photon Source, Lemont, IL, United States; Chen, Biaohua, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, China; Liu, Dijia, Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Yin, Huaqiang, Key Laboratory of Advanced Reactor Engineering and Safety, Tsinghua University, Beijing, China","Dual metal–organic frameworks (MOFs, i.e., MIL-100(Fe) and ZIF-8) are thermally converted into Fe–Fe<inf>3</inf>C-embedded Fe–N-codoped carbon as platinum group metal (PGM)-free oxygen reduction reaction (ORR) electrocatalysts. Pyrolysis enables imidazolate in ZIF-8 rearranged into highly N-doped carbon, while Fe from MIL-100(Fe) into N-ligated atomic sites concurrently with a few Fe–Fe<inf>3</inf>C nanoparticles. Upon precise control of MOF compositions, the optimal catalyst is highly active for the ORR in half-cells (0.88 V in base and 0.79 V versus RHE in acid in half-wave potential), a proton exchange membrane fuel cell (0.76 W cm−2 in peak power density) and an aprotic Li–O<inf>2</inf> battery (8749 mAh g−1 in discharge capacity), representing a state-of-the-art PGM-free ORR catalyst. In the material, amorphous carbon with partial graphitization ensures high active site exposure and fast charge transfer simultaneously. Macropores facilitate mass transport to the catalyst surface, followed by oxygen penetration in micropores to reach the infiltrated active sites. Further modeling simulations shed light on the true Fe–Fe<inf>3</inf>C contribution to the catalyst performance, suggesting Fe<inf>3</inf>C enhances oxygen affinity, while metallic Fe promotes *OH desorption as the rate-determining step at the nearby Fe–N–C sites. These findings demonstrate MOFs as model system for rational design of electrocatalyst for energy-based functional applications. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",H2–O2 fuel cell; iron–nitrogen–carbon; Li–O2 battery; metal–organic frameworks; oxygen reduction reaction,Amorphous carbon; Catalyst activity; Cell engineering; Charge transfer; Charging (batteries); Doping (additives); Electrocatalysts; Electrolytic reduction; Fuel cells; Iron; Oxygen; Secondary batteries; Catalyst performance; Discharge capacities; Functional applications; Half-wave potential; Oxygen reduction reaction; Peak power densities; Platinum group metals; Rate determining step; Proton exchange membrane fuel cells (PEMFC),H2–O2 fuel cell;iron–nitrogen–carbon;Li–O2 battery;metal–organic frameworks;oxygen reduction reaction;Amorphous carbon;Catalyst activity;Cell engineering;Charge transfer;Charging (batteries);Doping (additives);Electrocatalysts;Electrolytic reduction;Fuel cells;Iron;Oxygen;Secondary batteries;Catalyst performance;Discharge capacities;Functional applications;Half-wave potential;Peak power densities;Platinum group metals;Rate determining step;Proton exchange membrane fuel cells (PEMFC),"F.-X. Yin; Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, China; email: yinfx@mail.buct.edu.cn",,,,,,Wiley-VCH Verlag info@wiley-vch.de,1616301X,,AFMDC,,English,Adv. Funct. Mater.,Article,Scopus,,2-s2.0-85063984460,,China;United States,mail.buct.edu.cn,,,"Wang, H.; Yin, F.-X.; Liu, N.; Kou, R.-H.; He, X.-B.; Sun, C.-J.; Chen, B.-H.; Liu, D.-J.; Yin, H.-Q."
"Wang, Q., Shang, L., Sun-Waterhouse, D., Zhang, T., Waterhouse, G.I.N.",Engineering local coordination environments and site densities for high-performance Fe-N-C oxygen reduction reaction electrocatalysis,2021,SmartMat,2,2,,154,175,,101,10.1002/smm2.1033,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85111486904&doi=10.1002%2Fsmm2.1033&partnerID=40&md5=55e0767c233a2f72bd0b511844d5547f,"School of Chemical Sciences, University of Auckland, Auckland, AUK, New Zealand; Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Sciences, Beijing, China","Wang, Qing, School of Chemical Sciences, University of Auckland, Auckland, AUK, New Zealand; Shang, Lu, Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Sciences, Beijing, China; Sun-Waterhouse, Dongxiao, School of Chemical Sciences, University of Auckland, Auckland, AUK, New Zealand; Zhang, Tierui, Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Sciences, Beijing, China; Waterhouse, Geoffrey I. N., School of Chemical Sciences, University of Auckland, Auckland, AUK, New Zealand","Fe-N-C catalysts represent very promising cathode catalysts for polymer electrolyte fuel cells, owing to their outstanding activity for the oxygen reduction reaction (ORR), especially in alkaline media. In this review, we summarize recent advances in the design and synthesis of Fe-N-C catalysts rich in highly dispersed FeN<inf>x</inf> active sites. Special emphasis is placed on emerging strategies for tuning the electronic structure of the Fe atoms to enhance the ORR activity, and also maximizing the surface concentration of FeN<inf>x</inf> sites that are catalytically accessible during ORR. While great progress has been made over the past 5 years in the development of Fe-N-C catalyst for ORR, significant technical obstacles still need to be overcome to enable the large-scale application of Fe-N-C materials as cathode catalysts in real-world fuel cells. © 2021 The Authors. SmartMat published by Tianjin University and John Wiley &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#x0026; Sons Australia, Ltd.",Fe-N-C; local coordination environment; oxygen reduction reaction; site density,Catalyst activity; Cathodes; Coordination reactions; Electrocatalysis; Electronic structure; Iron compounds; Oxygen; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Cathode catalyst; Coordination environment; Coordination sites; Environment density; Fe-N-C; Local coordination; Local coordination environment; Oxygen reduction reaction; Site density; ]+ catalyst; Electrolytic reduction,Fe-N-C;local coordination environment;oxygen reduction reaction;site density;Catalyst activity;Cathodes;Coordination reactions;Electrocatalysis;Electronic structure;Iron compounds;Oxygen;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Cathode catalyst;Coordination environment;Coordination sites;Environment density;Local coordination;]+ catalyst;Electrolytic reduction,"G. Waterhouse; School of Chemical Sciences, The University of Auckland, Auckland, New Zealand; email: g.waterhouse@auckland.ac.nz; T. Zhang; Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry (TIPC), Chinese Academy of Sciences (CAS), Beijing, No. 29 Zhongguancun East Road, Haidian District, 100190, China; email: tierui@mail.ipc.ac.cn",,,,,,John Wiley & Sons Inc,27668525,,,,English,SmartMat,Review,Scopus,,2-s2.0-85111486904,,New Zealand;China,auckland.ac.nz,,,"Wang, Q.; Shang, L.; Sun-Waterhouse, D.; Zhang, T.; Waterhouse, G.I.N."
"Chen, C., Li, Y., Huang, A., Liu, X., Li, J., Zhang, Y., Chen, Z., Zhuang, Z., Wu, Y., Cheong, W.C., Tan, X., Sun, K., Xu, Z., Liu, D., Wang, Z., Zhou, K., Chen, C.",Engineering Molecular Heterostructured Catalyst for Oxygen Reduction Reaction,2023,Journal of the American Chemical Society,145,39,,21273,21283,,57,10.1021/jacs.3c05371,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85174080560&doi=10.1021%2Fjacs.3c05371&partnerID=40&md5=a4d2b1fc7977b710cbad6215b9ac4e90,"Department of Chemistry, Tsinghua University, Beijing, China; School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, China; Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, Canada; School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, China; Beijing University of Chemical Technology, Beijing, China; Beijing Institute of Aerospace Testing Technology, Beijing, Beijing, China; College of Materials Science and Engineering, Fuzhou University, Fuzhou, Fujian, China; Faculty of Innovation Engineering, Macau University of Science and Technology, Taipa, Macao","Chen, Chang, Department of Chemistry, Tsinghua University, Beijing, China, School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, China; Li, Yifan, School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, China, Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, Canada; Huang, Aijian, Department of Chemistry, Tsinghua University, Beijing, China, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, China; Liu, Xuerui, Beijing University of Chemical Technology, Beijing, China; Li, Jiazhan, Department of Chemistry, Tsinghua University, Beijing, China; Zhang, Yu, Department of Chemistry, Tsinghua University, Beijing, China; Chen, Zhiqiang, Beijing Institute of Aerospace Testing Technology, Beijing, Beijing, China; Zhuang, Zeweng, College of Materials Science and Engineering, Fuzhou University, Fuzhou, Fujian, China; Wu, Yue, College of Materials Science and Engineering, Fuzhou University, Fuzhou, Fujian, China; Cheong, Weng Chon, Faculty of Innovation Engineering, Macau University of Science and Technology, Taipa, Macao; Tan, Xin, Department of Chemistry, Tsinghua University, Beijing, China; Sun, Kaian, Department of Chemistry, Tsinghua University, Beijing, China; Xu, Zhichuan (Jason), Department of Chemistry, Tsinghua University, Beijing, China; Liu, Di, Department of Chemistry, Tsinghua University, Beijing, China; Wang, Zhiguo, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, China; Zhou, Kebin, School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, China; Chen, Chen, Department of Chemistry, Tsinghua University, Beijing, China","Introducing a second metal species into atomically dispersed metal-nitrogen-carbon (M-N-C) catalysts to construct diatomic sites (DASs) is an effective strategy to elevate their activities and stabilities. However, the common pyrolysis-based method usually leads to substantial uncertainty for the formation of DASs, and the precise identification of the resulting DASs is also rather difficult. In this regard, we developed a two-step specific-adsorption strategy (pyrolysis-free) and constructed a DAS catalyst featuring FeCo “molecular heterostructures” (FeCo-MHs). In order to rule out the possibility of the two apparently neighboring (in the electron microscopy image) Fe/Co atoms being dispersed respectively on the top/bottom surfaces of the carbon support and thus forming “false” MHs, we conducted in situ rotation (by 8°, far above the critical angle of 5.3°) and directly identified the individual FeCo-MHs. The formation of FeCo-MHs could modulate the magnetic moments of the metal centers and increase the ratio of low-spin Fe(II)-N<inf>4</inf> moiety; thus the intrinsic activity could be optimized at the apex of the volcano-plot (a relationship as a function of magnetic moments of metal-phthalocyanine complexes and catalytic activities). The FeCo-MHs catalyst displays an exceptional ORR activity (E<inf>1/2</inf> = 0.95 V) and could be used to construct high-performance cathodes for hydroxide exchange membrane fuel cells and zinc-air batteries. © 2023 American Chemical Society",,Carbon; Catalyst activity; Electrolytic reduction; Iron compounds; Molecular oxygen; Proton exchange membrane fuel cells (PEMFC); Pyrolysis; Carbon catalysts; Diatomics; Dispersed metals; Electron microscopy images; Metal species; Nitrogen-carbon; Oxygen reduction reaction; Specific adsorption; Uncertainty; ]+ catalyst; Magnetic moments; carbon; carbon nanotube; hydroxide; iron; oxygen; zinc; Article; catalyst; electron microscopy; engineering; inductively coupled plasma mass spectrometry; linear sweep voltammetry; molecular heterostructured catalyst; nonhuman; pyrolysis; scanning electron microscopy; transmission electron microscopy; wavelet transform; X ray absorption spectroscopy,Carbon;Catalyst activity;Electrolytic reduction;Iron compounds;Molecular oxygen;Proton exchange membrane fuel cells (PEMFC);Pyrolysis;Carbon catalysts;Diatomics;Dispersed metals;Electron microscopy images;Metal species;Nitrogen-carbon;Oxygen reduction reaction;Specific adsorption;Uncertainty;]+ catalyst;Magnetic moments;carbon nanotube;hydroxide;iron;oxygen;zinc;Article;catalyst;electron microscopy;engineering;inductively coupled plasma mass spectrometry;linear sweep voltammetry;molecular heterostructured catalyst;nonhuman;scanning electron microscopy;transmission electron microscopy;wavelet transform;X ray absorption spectroscopy,"K. Zhou; School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China; email: kbzhou@ucas.ac.cn; C. Chen; Engineering Research Center of Advanced Rare Earth Materials, Department of Chemistry, Tsinghua University, Beijing, 100084, China; email: cchen@mail.tsinghua.edu.cn",,,,,,American Chemical Society,00027863,,JACSA,37729633,English,J. Am. Chem. Soc.,Article,Scopus,,2-s2.0-85174080560,,China;Canada;Macao,ucas.ac.cn,,,"Chen, C.; Li, Y.; Huang, A.; Liu, X.; Li, J.; Zhang, Y.; Chen, Z.; Zhuang, Z.; Wu, Y.; Cheong, W.-C.; Tan, X.; Sun, K.; Xu, Z.; Liu, D.; Wang, Z.; Zhou, K.; Chen, C."
"Zhang, H.G., Osgood, H., Xie, X.H., Shao, Y.Y., Wu, G.",Engineering nanostructures of PGM-free oxygen-reduction catalysts using metal-organic frameworks,2017,NANO ENERGY,31,,,331,350,20,346,10.1016/j.nanoen.2016.11.033,,"[Zhang, Hanguang; Osgood, Hannah; Wu, Gang] Univ Buffalo State Univ New York, Dept Chem & Biol Engn, Buffalo, NY 14260 USA; [Xie, Xiaohong; Shao, Yuyan] Pacific Northwest Natl Lab, Richland, WA 99352 USA",,"Oxygen reduction reaction (ORR) is one of the essential electrochemical reactions for the energy conversion and storage devices such as fuel cells and metal-air batteries. However, a large amount of Pt is required for catalyzing the kinetically sluggish ORR at the air cathode, therefore greatly limiting their large scale implementation. Development of high-performance platinum group-metal (PGM)-free ORR catalysts has been a long-term goal for these clean energy technologies. However, current PGM-free catalysts are still significantly suffering from insufficient activity and limited durability especially in more challenging acidic media, such as proton exchange membrane (PEM) fuel cells. Recently, metal-organic frameworks (MOFs), constructed from bridging metal ions and ligands, have emerged as a new type of attractive precursors for the synthesis of PGM-free catalysts, which has led to encouraging performance improvement. Compared to other catalyst precursors, MOF5 have well-defined crystal structure with readily tunable chemistry and contain all required elements (e.g., carbon, nitrogen, and metal). Here, we provide an account of recent innovative PGM-free catalyst design and synthesis derived from the unique MOF precursors with special emphasis on engineering nanostructure and morphology of catalysts. We aim to provide new insights into the design and synthesis of advanced PGM-free catalysts with increased density of active sites and controlled bonding in 3D frame network. In addition, we also discuss the possibility to use the well-defined MOF precursors for building up model systems to elucidate the structure-property correlations and the nature of active sites.",Electrocatalysts; Oxygen reduction; Platinum group-metal (PGM)-free; Metal-organic frameworks; Nanostructures,NITROGEN-DOPED CARBON; HIGH-SURFACE-AREA; ONE-STEP SYNTHESIS; PEM FUEL-CELLS; POROUS CARBON; HIGHLY EFFICIENT; CATHODE CATALYSTS; FE/N/C-CATALYSTS; NONPRECIOUS ELECTROCATALYSTS; IMIDAZOLATE FRAMEWORK,Electrocatalysts;Oxygen reduction;Platinum group-metal (PGM)-free;Metal-organic frameworks;Nanostructures;NITROGEN-DOPED CARBON;HIGH-SURFACE-AREA;ONE-STEP SYNTHESIS;PEM FUEL-CELLS;POROUS CARBON;HIGHLY EFFICIENT;CATHODE CATALYSTS;FE/N/C-CATALYSTS;NONPRECIOUS ELECTROCATALYSTS;IMIDAZOLATE FRAMEWORK,yuyan.shao@pnnl.gov; gangwu@buffalo.edu,,"PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS",,,,ELSEVIER SCIENCE BV,2211-2855,,,,English,NANO ENERGY,Review,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000393446500038,,United States,pnnl.gov,Univ Buffalo State Univ New York;Pacific Northwest Natl Lab,"Univ Buffalo State Univ New York, United States;Pacific Northwest Natl Lab, United States","Zhang, Hanguang; Osgood, Hannah; Xie, Xiaohong; Shao, Yuyan; Wu, Gang"
"Ma, Z., Wan, Z., Zhao, S., Li, J., Du, J., Wang, X.",Engineering the d-Orbital Electronic Delocalization of Atomic Fe–Co Dual-Metal Sites through Fe3C Nanoparticle Integration to Enhance Oxygen Reduction,2025,ACS Applied Materials and Interfaces,17,36,,50665,50675,,0,10.1021/acsami.5c09457,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105015506480&doi=10.1021%2Facsami.5c09457&partnerID=40&md5=97311f5f682e1891ea0ace3ce2fac44f,"College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, China; Laboratory of Advanced Materials and Energy Electrochemistry, Taiyuan University of Technology, Taiyuan, Shanxi, China","Ma, Zizai, College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, China; Wan, Zihao, Laboratory of Advanced Materials and Energy Electrochemistry, Taiyuan University of Technology, Taiyuan, Shanxi, China; Zhao, Shuaili, Laboratory of Advanced Materials and Energy Electrochemistry, Taiyuan University of Technology, Taiyuan, Shanxi, China; Li, Jinping, College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, China; Du, Jianping, College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, China; Wang, Xiaoguang, Laboratory of Advanced Materials and Energy Electrochemistry, Taiyuan University of Technology, Taiyuan, Shanxi, China","Bimetallic single-atom catalysts have garnered considerable interest in the field of the oxygen reduction reaction due to their unique electronic configurations and synergistic catalytic effects. However, precise modulation of d-orbital electron distribution at single-atom sites and comprehensive elucidation of the underlying catalytic mechanisms continue to present significant challenges. Herein, the FeCo(mlm)–N–C catalyst, integrating atomically dispersed Fe–Co dual-metal sites and Fe<inf>3</inf>C nanoparticles, was synthesized by using an encapsulation and ligand exchange strategy. Comprehensive analyses and theoretical simulations reveal that the incorporation of Fe<inf>3</inf>C nanoparticles induces significant d-orbital electron delocalization at the Fe active sites. This tailored electronic configuration effectively modulates Fe d–O p hybridization between the Fe active sites and adsorbed OH*. Consequently, it optimizes the occupancies of bonding and antibonding orbitals, thereby accelerating OH* desorption. This mechanism enables FeCo(mlm)–N–C to exhibit excellent catalytic performance and remarkable stability in both acidic and alkaline environments, while demonstrating superior activity in zinc-air batteries and proton exchange membrane fuel cells. This work not only presents a highly efficient non-noble metal electrocatalyst but also provides valuable insights into the rational development of advanced transition metal–nitrogen–carbon catalysts for energy-related applications. © 2025 American Chemical Society",delocalization; dual-metal sites; hybridization; nanoparticles; oxygen reduction reaction,Alkalinity; Atoms; Binary alloys; Catalysis; Catalyst activity; Chemical bonds; Cobalt alloys; Electrocatalysts; Iron; Iron compounds; Metal nanoparticles; Oxygen; Oxygen reduction reaction; Synthesis (chemical); D orbitals; Delocalizations; Dual metals; Dual-metal site; Electronic configuration; Hybridisation; Metal sites; Single-atoms; ]+ catalyst; Electrolytic reduction; carbon; metal; nanoparticle; oxygen; proton; transition element; zinc; article; atom; catalysis; catalyst; controlled study; desorption; electron; encapsulation; fuel; hybridization; membrane; pharmaceutics; simulation,delocalization;dual-metal sites;hybridization;nanoparticles;oxygen reduction reaction;Alkalinity;Atoms;Binary alloys;Catalysis;Catalyst activity;Chemical bonds;Cobalt alloys;Electrocatalysts;Iron;Iron compounds;Metal nanoparticles;Oxygen;Synthesis (chemical);D orbitals;Delocalizations;Dual metals;Dual-metal site;Electronic configuration;Hybridisation;Metal sites;Single-atoms;]+ catalyst;Electrolytic reduction;carbon;metal;nanoparticle;proton;transition element;zinc;article;atom;catalyst;controlled study;desorption;electron;encapsulation;fuel;membrane;pharmaceutics;simulation,"Z. Ma; College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, 030024, China; email: mazizai@tyut.edu.cn; X. Wang; Laboratory of Advanced Materials and Energy Electrochemistry, Institute of New Carbon Materials, College of Material Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China; email: wangxiaoguang@tyut.edu.cn",,,,,,American Chemical Society,19448244,,,40882154,English,ACS Appl. Mater. Interfaces,Article,Scopus,,2-s2.0-105015506480,,China,tyut.edu.cn,,,"Ma, Z.; Wan, Z.; Zhao, S.; Li, J.; Du, J.; Wang, X."
"Qiao, M., Titirici, M.M.",Engineering the Interface of Carbon Electrocatalysts at the Triple Point for Enhanced Oxygen Reduction Reaction,2018,Chemistry - A European Journal,24,69,,18374,18384,,54,10.1002/chem.201804610,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85056473662&doi=10.1002%2Fchem.201804610&partnerID=40&md5=11406dbb09c3ff41a6edca1cce6a2d0c,"Queen Mary University of London, London, United Kingdom; Materials Research Institute, Queen Mary University of London, London, United Kingdom","Qiao, Mo, Queen Mary University of London, London, United Kingdom; Titirici, Maria Magdalena, Queen Mary University of London, London, United Kingdom, Materials Research Institute, Queen Mary University of London, London, United Kingdom","The aqueous oxygen reduction reaction (ORR) has recently received increased attention due to its critical role in clean and sustainable energy-generation technologies, such as proton exchange membranes (PEM) fuel cells, alkaline fuel cells and Zn–air batteries. The sluggish kinetics associated with ORR result from multistep electron-transfer process. The slow kinetics are partially related to the O<inf>2</inf> adsorption process onto the catalyst, which happens at the triple-phase boundary (TPB) of the electrocatalyst–electrolyte–oxygen interface. Hence, tremendous efforts have been devoted to improving the intrinsic properties of electrocatalysts such as active sites, electrical conductivity and porosity. Engineering the electrocatalyst's interfacial properties is another critical issue in ORR, however less described in the literature. The surface of the catalyst provides the microenvironment for the triple boundary interface reaction, which directly influences its electrocatalytic activity and the kinetics. This Minireview is a summary of the existing literature on manipulating the interfacial surface of non-precious metal catalysts at the triple point between the solid catalyst, the aqueous electrolyte and the O<inf>2</inf> gas with the aim of improving the ORR efficiency. Various approaches towards improving the wettability and nanostructuring the catalyst surface to boost the activity of the surface-active sites and provide improved stability are discussed. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",electrocatalysis; interface reaction; non-precious metal catalysts; oxygen reduction reaction; triple-phase boundary,Alkaline fuel cells; Carbon; Catalyst activity; Electrocatalysis; Electrocatalysts; Electrolytic reduction; Electron transport properties; Kinetics; Nanocatalysts; Oxygen; Precious metals; Proton exchange membrane fuel cells (PEMFC); Reaction kinetics; Electrical conductivity; Electrocatalytic activity; Interface reactions; Multi-step electron transfer; Non-precious metal catalysts; Oxygen reduction reaction; Proton exchange membranes fuel cells; Triple phase boundary; Solid electrolytes,electrocatalysis;interface reaction;non-precious metal catalysts;oxygen reduction reaction;triple-phase boundary;Alkaline fuel cells;Carbon;Catalyst activity;Electrocatalysts;Electrolytic reduction;Electron transport properties;Kinetics;Nanocatalysts;Oxygen;Precious metals;Proton exchange membrane fuel cells (PEMFC);Reaction kinetics;Electrical conductivity;Electrocatalytic activity;Interface reactions;Multi-step electron transfer;Proton exchange membranes fuel cells;Triple phase boundary;Solid electrolytes,"M.-M. Titirici; School of Engineering and Materials Science, Queen Mary University of London, London, Mile End Road, E1 4NS, United Kingdom; email: m.m.titirici@qmul.ac.uk",,,,,,Wiley-VCH Verlag info@wiley-vch.de,09476539,,CEUJE,30307068,English,Chem. Eur. J.,Review,Scopus,,2-s2.0-85056473662,,United Kingdom,qmul.ac.uk,,,"Qiao, M.; Titirici, M.-M."
"Holst-Olesen, K., Reda, M., Hansen, H.A., Vegge, T., Arenz, M.",Enhanced Oxygen Reduction Activity by Selective Anion Adsorption on Non-Precious-Metal Catalysts,2018,ACS Catalysis,8,8,,7104,7112,,80,10.1021/acscatal.8b01584,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85048988207&doi=10.1021%2Facscatal.8b01584&partnerID=40&md5=4ab990a558d108732020b175bcf7bae1,"Department of Chemistry, Københavns Universitet, Copenhagen, Hovedstaden, Denmark; Department of Energy Conversion and Storage, Technical University of Denmark, Lyngby, Hovedstaden, Denmark; Department of Chemistry and Biochemistry, University of Bern, Bern, BE, Switzerland","Holst-Olesen, Kaspar, Department of Chemistry, Københavns Universitet, Copenhagen, Hovedstaden, Denmark; Reda, Mateusz, Department of Energy Conversion and Storage, Technical University of Denmark, Lyngby, Hovedstaden, Denmark; Hansen, Heine Anton, Department of Energy Conversion and Storage, Technical University of Denmark, Lyngby, Hovedstaden, Denmark; Vegge, Tejs, Department of Energy Conversion and Storage, Technical University of Denmark, Lyngby, Hovedstaden, Denmark; Arenz, Matthias, Department of Chemistry and Biochemistry, University of Bern, Bern, BE, Switzerland","Non-precious-metal catalysts (NPMC) are promising alternatives to platinum-based catalysts for the oxygen reduction reaction (ORR), which is the cathode reaction in fuel cells. In this paper, we focus on an iron-nitrogen-carbon (Fe/N/C) catalyst, in comparison to platinum, and investigate how these different types of catalysts behave toward selective anion poisoning. The catalysts are studied with respect to their ORR activity, using the rotating disk electrode (RDE) technique in aqueous HClO<inf>4</inf>, H<inf>2</inf>SO<inf>4</inf>, H<inf>3</inf>PO<inf>4</inf>, and HCl electrolytes, and the results are supported by density functional theory (DFT) calculations. We find that the ORR on the Fe/N/C catalyst is less affected by anion poisoning than platinum. Surprisingly, it is seen that phosphoric acid not only does not poison the Fe/N/C catalyst, but instead promotes the ORR; this finding is in sharp contrast to the poisoning effect observed on platinum. This is a highly important finding, as modern high-temperature proton exchange fuel cells (HT-PEMFCs) employ membranes consisting of phosphoric acid that is immobilized into a polybenzimidazole (PBI) matrix. © 2018 American Chemical Society.",,Catalyst poisoning; Chlorine compounds; Density functional theory; Electrodes; Electrolytic reduction; Ions; Oxygen; Phosphoric acid; Platinum; Precious metals; Proton exchange membrane fuel cells (PEMFC); Rotating disks; Cathode reactions; Non-precious metal catalysts; Oxygen reduction reaction; Platinum based catalyst; Poisoning effects; Polybenzimidazole; Proton exchange fuel cells; Rotating disk electrodes; Phosphoric acid fuel cells (PAFC),Catalyst poisoning;Chlorine compounds;Density functional theory;Electrodes;Electrolytic reduction;Ions;Oxygen;Phosphoric acid;Platinum;Precious metals;Proton exchange membrane fuel cells (PEMFC);Rotating disks;Cathode reactions;Non-precious metal catalysts;Oxygen reduction reaction;Platinum based catalyst;Poisoning effects;Polybenzimidazole;Proton exchange fuel cells;Rotating disk electrodes;Phosphoric acid fuel cells (PAFC),"T. Vegge; Department of Energy Conversion and Storage, Technical University of Denmark, Kgs Lyngby, 2800, Denmark; email: teve@dtu.dk",,,,,,American Chemical Society service@acs.org,21555435,,ACCAC,,English,ACS Catal.,Article,Scopus,,2-s2.0-85048988207,,Denmark;Switzerland,dtu.dk,,,"Holst-Olesen, K.; Reda, M.; Hansen, H.A.; Vegge, T.; Arenz, M."
"Zhao, J.Q., Guo, J., Wang, W., Wei, X., Lu, J.H., Ren, C.J., Wu, J., Xin, Y., Yang, R.Z.",Enhanced Oxygen Reduction on Hemin-Derived Fe-N Codoped Hierarchically Porous Carbon for Proton Exchange Membrane Fuel Cells,2025,ENERGY & FUELS,39,20,,9576,9584,9,1,10.1021/acs.energyfuels.5c00522,,"[Zhao, Jiaqing; Guo, Jie; Wang, Wei; Wei, Xian; Lu, Jiahao; Ren, Chaojie; Yang, Ruizhi] Soochow Univ, Soochow Inst Energy & Mat Innovat, Coll Energy, Suzhou 215006, Peoples R China; [Zhao, Jiaqing; Xin, Yu] Soochow Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China; [Wu, Jiao] Shanxi Univ, Sch Elect Power Civil Engn & Architecture, Taiyuan 030006, Peoples R China",,"Although Pt-based catalysts demonstrate superior activity for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs), their exorbitant cost and scarcity hinder large-scale commercialization. Therefore, it is crucial to develop inexpensive and high-performance ORR catalysts to replace Pt-based catalysts. Herein, Fe-N codoped hierarchically ordered porous carbon catalysts (Fe-N-HOPC) are fabricated using Hemin as a precursor and three-dimensionally ordered SiO2 nanoparticles as a hard template. The incorporation of the hard template not only increases the specific surface area of the catalyst (124.8 m2 g-1) but also effectively prevents the formation of agglomerated Fe nanoparticles during the carbonization process. The as-fabricated Fe-N-HOPC exhibits excellent ORR catalytic activity under acidic conditions with a half-wave potential (E 1/2) of 0.74 V, high selectivity of nearly four-electron transfer, and appreciable stability. As a cathode catalyst in a PEMFC, a peak power density of 405.3 mW cm-2 is delivered and a current density retention of 93.4% after 10 h of operation is achieved. This work provides a facile template-assisted method for designing and tuning of highly active Fe-N-C nonprecious metal catalysts toward practical ORR in PEMFC.",,CATALYSTS; ELECTROCATALYST; NETWORK; IRON,CATALYSTS;ELECTROCATALYST;NETWORK;IRON,jiaow@sxu.edu.cn; yuxin@suda.edu.cn; yangrz@suda.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,0887-0624,,,,English,ENERG FUEL,Article,WoS,Energy & Fuels; Engineering,WOS:001485355400001,2-s2.0-105004893071,China,sxu.edu.cn,Soochow Univ;Shanxi Univ,"Soochow Univ, China;Shanxi Univ, China","Zhao, Jiaqing; Guo, Jie; Wang, Wei; Wei, Xian; Lu, Jiahao; Ren, Chaojie; Wu, Jiao; Xin, Yu; Yang, Ruizhi"
"Junaidi, N.H.A., Wong, W.Y., Loh, K.S., Rahman, S., Choo, T.F., Wu, B.",Enhanced oxygen reduction reaction catalyst stability and durability of MXene-supported Fe-N-C catalyst for proton exchange membrane fuel cell application,2023,JOURNAL OF ALLOYS AND COMPOUNDS,968,,171898,,,12,29,10.1016/j.jallcom.2023.171898,,"[Junaidi, Norhamizah Hazirah Ahmad; Wong, Wai Yin; Loh, Kee Shyuan] Univ Kebangsaan Malaysia, Fuel Cell Inst, Bangi 43600, Selangor, Malaysia; [Rahman, Saidur] Sunway Univ, Res Ctr Nanomat & Energy Technol, Sch Engn & Technol, Jalan Univ, Petaling Jaya 47500, Selangor, Malaysia; [Choo, Thye Foo] Agensi Nuklear Malaysia, Kajang 43000, Selangor, Malaysia; [Wu, Bo] H2Green Ningbo New Energy Technol Co Ltd, 3F Bldg 17,Fugang Elect Commerce Mall, 5000 Airpor, Ningbo, Zhejiang, Peoples R China; [Rahman, Saidur] Univ Lancaster, Sch Engn, Lancaster LA1 4YW, England",,"The wide application of proton exchange membrane fuel cells (PEMFCs) is hindered by their slow oxygen reduction reaction (ORR) at the cathode. To increase their practicality and economic viability, non-noble metal catalysts are developed to boost the cathodic reaction. However, they exhibit lower activity than noble metal catalysts and suffer from durability issues. In this study, multilayer Ti3C2Tx MXene is used as the catalyst support for a non-noble metal Fe-N-C catalyst for ORR. Fe-N-C is synthesized by doping Fe ions into a zeolitic imidazole framework (ZIF-8) precursor. MXene is introduced after the first pyrolysis with different mass ratios. A second pyrolysis heat treatment is employed to optimize the catalyst activity and stability. The optimized Fe-N-C/ Ti3C2Tx-(4:1)- 500 composite catalyst demonstrates higher ORR activity (Eonset = 0.88 V vs. RHE) than Fe-N-C (Eonset = 0.83 V vs. RHE) catalyst. Its stability is better than commercial Pt/C for over 10,000 s based on a chronoamperometry test. More than 94% of the current remains after 10,000 s for the composite catalyst, while Pt/C only retains 61%. The durability investigation involving load cycle and start-stop cycle protocols further substantiates the durability of the Fe-N-C/Ti3C2Tx-(4:1)- 500 catalyst for ORR. In addition, the use of Ti3C2Tx MXene as the catalyst support for Fe-N-C improves PEMFC performance with an 80.8% increment in power density compared to that without MXene support.",Stable catalyst; Fe-N-C; Multilayer MXene; Oxygen reduction reaction; PEMFC,ELECTROCATALYST; NANOPARTICLES; NITROGEN,Stable catalyst;Fe-N-C;Multilayer MXene;Oxygen reduction reaction;PEMFC;ELECTROCATALYST;NANOPARTICLES;NITROGEN,waiyin.wong@ukm.edu.my,,"PO BOX 564, 1001 LAUSANNE, SWITZERLAND",,,,ELSEVIER SCIENCE SA,0925-8388,,,,English,J ALLOY COMPD,Article,WoS,Chemistry; Materials Science; Metallurgy & Metallurgical Engineering,WOS:001079128100001,2-s2.0-85170578846,Malaysia;China;United Kingdom,ukm.edu.my,Univ Kebangsaan Malaysia;Sunway Univ;Agensi Nuklear Malaysia;H2Green Ningbo New Energy Technol Co Ltd;Univ Lancaster,"Univ Kebangsaan Malaysia, Malaysia;Sunway Univ, Malaysia;Agensi Nuklear Malaysia, Malaysia;H2Green Ningbo New Energy Technol Co Ltd, China;Univ Lancaster, United Kingdom","Junaidi, Norhamizah Hazirah Ahmad; Wong, Wai Yin; Loh, Kee Shyuan; Rahman, Saidur; Choo, Thye Foo; Wu, Bo"
"Barkholtz, H.M., Chong, L., Kaiser, Z.B., Xu, T., Liu, D.J.",Enhanced performance of non-PGM catalysts in air operated PEM-fuel cells,2016,INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,41,47,,22598,22604,7,20,10.1016/j.ijhydene.2016.08.193,,"[Barkholtz, Heather M.; Chong, Lina; Kaiser, Zachary B.; Liu, Di-Jia] Argonne Natl Lab, Chem Sci & Engn Div, 9700 S Cass Ave, Lemont, IL 60439 USA; [Barkholtz, Heather M.; Xu, Tao] Northern Illinois Univ, Dept Chem & Biochem, 1425 W Lincoln Hwy, De Kalb, IL 60115 USA",,"A non-platinum group metal (non-PGM) oxygen reduction catalyst was prepared from ""support-free"" zeolitic imidazolate framework (ZIF) precursor and tested in the proton exchange membrane fuel cell with air as the cathode feed. The iron nitrogen and carbon composite (Fe-N-C) based catalyst has high specific surface area decorated uniformly with active sites, which redefines the triple phase boundary (TPB) and requires re-optimization of the cathodic membrane electrode fabrication to ensure efficient mass and charge transports to the catalyst surface. This study reports an effort in optimizing catalytic ink formulation for the membrane electrode preparation and its impact to the fuel cell performance under air. Through optimization, the fuel cell areal current density as high as 115.2 mA/cm(2) at 0.8 V or 147.6 mA/cm(2) at 0.8 ViR-free has been achieved under one bar air. Impacts on fuel cell internal impedance and the water formation are also investigated. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.",Oxygen reduction reaction; Fuel cell; Non-platinum group metal; MOF; Fe-N-C catalyst,OXYGEN REDUCTION REACTION; ZEOLITIC IMIDAZOLATE FRAMEWORK; METAL-ORGANIC FRAMEWORKS; GAS-DIFFUSION ELECTRODES; NITROGEN-DOPED CARBON; NAFION CONTENT; LAYER; ELECTROCATALYSTS; IRON; OPTIMIZATION,Oxygen reduction reaction;Fuel cell;Non-platinum group metal;MOF;Fe-N-C catalyst;ZEOLITIC IMIDAZOLATE FRAMEWORK;METAL-ORGANIC FRAMEWORKS;GAS-DIFFUSION ELECTRODES;NITROGEN-DOPED CARBON;NAFION CONTENT;LAYER;ELECTROCATALYSTS;IRON;OPTIMIZATION,djliu@anl.gov,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",Conference on Electrolysis and Fuel Cell Discussions (EFCD) - Challenges Towards Zero Platinum for Oxygen Reduction,"La Grande Motte, FRANCE","SEP 13-16, 2015",PERGAMON-ELSEVIER SCIENCE LTD,0360-3199,,,,English,INT J HYDROGEN ENERG,Article; Proceedings Paper,WoS,Chemistry; Electrochemistry; Energy & Fuels,WOS:000389786500073,2-s2.0-84997456773,United States,anl.gov,Argonne Natl Lab;Northern Illinois Univ,"Argonne Natl Lab, United States;Northern Illinois Univ, United States","Barkholtz, Heather M.; Chong, Lina; Kaiser, Zachary B.; Xu, Tao; Liu, Di-Jia"
"Yasuda, S., Uchibori, Y., Wakeshima, M., Hinatsu, Y., Ogawa, H., Yano, M., Asaoka, H.",Enhancement of Fe-N-C carbon catalyst activity for the oxygen reduction reaction: effective increment of active sites by a short and repeated heating process,2018,RSC Advances,8,66,,37600,37605,,13,10.1039/C8RA08359B,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85057015196&doi=10.1039%2FC8RA08359B&partnerID=40&md5=107e739d20f44d3e647b7aad59211542,"Research Group for Nanoscale Structure and Function of Advanced Materials, Japan Atomic Energy Agency, Kashiwa, Chiba, Japan; Department of Chemistry, Hokkaido University, Sapporo, Hokkaido, Japan; Research Group for Radiation Materials Engineering, Japan Atomic Energy Agency, Kashiwa, Chiba, Japan","Yasuda, Satoshi, Research Group for Nanoscale Structure and Function of Advanced Materials, Japan Atomic Energy Agency, Kashiwa, Chiba, Japan; Uchibori, Yosuke, Department of Chemistry, Hokkaido University, Sapporo, Hokkaido, Japan; Wakeshima, Makoto, Department of Chemistry, Hokkaido University, Sapporo, Hokkaido, Japan; Hinatsu, Yukio, Department of Chemistry, Hokkaido University, Sapporo, Hokkaido, Japan; Ogawa, Hiroaki, Research Group for Radiation Materials Engineering, Japan Atomic Energy Agency, Kashiwa, Chiba, Japan; Yano, Masahiro, Research Group for Nanoscale Structure and Function of Advanced Materials, Japan Atomic Energy Agency, Kashiwa, Chiba, Japan; Asaoka, Hidehito, Research Group for Nanoscale Structure and Function of Advanced Materials, Japan Atomic Energy Agency, Kashiwa, Chiba, Japan","Controlling the formation of Fe-N-C catalytic sites is crucial to activate the oxygen reduction reaction (ORR) for realization of non-precious electrocatalysts in proton exchange membrane fuel cells (PEMFCs). We present a quantitative study on the effect of a newly obtained thermal history on the formation of Fe-N-C catalytic sites. A short and repeated heating process is employed as the new thermal history, where short heating (1 min) followed by quenching is applied to a sample with arbitrary repetition. Through electrochemical quantitative analysis, it is found that the new process effectively increases the Fe-N-C mass-based site density (MSD) to almost twice that achieved using a conventional continuous heating process, while the turn-over frequency (TOF) is independent of the process. Elemental analysis shows that the new process effectively suppresses the thermal desorption of Fe and N atoms during the initial formation stage and consequently contributes to an increase in the Fe-N-C site density. The resultant catalytic activity (gravimetric kinetic current density (0.8 V vs. RHE)) is 1.8 times higher than that achieved with the continuous heating process. The results indicate that fine control of the thermal history can effectively increase the catalytic activity and provide guidelines for further activation of non-precious ORR electrocatalysts for PEMFCs. © The Royal Society of Chemistry.",,Carbon; Chemical analysis; Electrocatalysts; Electrolytic reduction; Heating; Iron compounds; Oxygen; Proton exchange membrane fuel cells (PEMFC); Continuous heating; Kinetic currents; ORR electrocatalysts; Oxygen reduction reaction; Proton exchange membrane fuel cell (PEMFCs); Quantitative study; Thermal history; Turnover frequency; Catalyst activity,Carbon;Chemical analysis;Electrocatalysts;Electrolytic reduction;Heating;Iron compounds;Oxygen;Proton exchange membrane fuel cells (PEMFC);Continuous heating;Kinetic currents;ORR electrocatalysts;Oxygen reduction reaction;Proton exchange membrane fuel cell (PEMFCs);Quantitative study;Thermal history;Turnover frequency;Catalyst activity,"S. Yasuda; Research Group for Nanoscale Structure and Function of Advanced Materials, Advanced Science Research Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai, 319-1195, Japan; email: yasuda.satoshi@jaea.go.jp",,,,,,Royal Society of Chemistry,,,RSCAC,,English,RSC Adv.,Article,Scopus,,2-s2.0-85057015196,,Japan,jaea.go.jp,,,"Yasuda, S.; Uchibori, Y.; Wakeshima, M.; Hinatsu, Y.; Ogawa, H.; Yano, M.; Asaoka, H."
"Nematollahi, P., Neyts, E.C.",Enhancement of Mn-N-C single atom catalysts via sulfur and/or oxygen co-doping for oxygen reduction in acidic conditions: Unveiling the catalyst durability in fuel cells,2024,MOLECULAR CATALYSIS,553,,113745,,,8,9,10.1016/j.mcat.2023.113745,,"[Nematollahi, Parisa; Neyts, Erik C.] Univ Antwerp, Dept Chem, Res Grp Plasmant, NANOlab Ctr Excellence, Univ Pl 1, B-2610 Antwerp, Belgium",,"Carbon-supported single Mn sites coordinated with nitrogen (Mn-N-C) catalysts are amongst the most favorable platinum group metal-free (PGM-free) catalysts for proton exchange membrane fuel cells (PEMFCs). However, the high overpotential of these catalysts, limits their application for oxygen reduction reaction (ORR). Experi-ments showed that O and S heteroatom co-doping increases the catalytic activity of Mn-N-C catalysts for elec-trochemical gas conversion. This prompted us to perform a systematic investigation of the formed co-doped configurations at the atomic scale and to study the corresponding reaction mechanisms for oxygen reduction in acidic environment. All probable configurations for Mn-NxOySz/C10 complexes are considered and the most stable and durable structures are selected as ORR active catalysts. Our results confirm the strong stabilization of the Mn sites over N4- and N3-doped carbonaceous support and consequently their stability against oxidation in contrast to other O and/or S co-doped heterostructures.",Heteroatom doping; Oxygen reduction reaction; Mn-N-C catalyst; co-doping; fuel cell,METAL-FREE ELECTROCATALYSTS; DOPED CARBON; FE; GRAPHENE,Heteroatom doping;Oxygen reduction reaction;Mn-N-C catalyst;co-doping;fuel cell;METAL-FREE ELECTROCATALYSTS;DOPED CARBON;FE;GRAPHENE,parisa.nematollahi@uantwerpen.be,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2468-8231,,,,English,MOL CATAL,Article,WoS,Chemistry,WOS:001140568800001,2-s2.0-85179607559,Belgium,uantwerpen.be,Univ Antwerp,"Univ Antwerp, Belgium","Nematollahi, Parisa; Neyts, Erik C."
"Cho, Y., Park, S., Oh, S., Kang, J.S., Kim, M.G., Yoo, S.J.",Enhancing Active Site Density in Fe-NC Electrocatalysts via 2D Structural Engineering for Efficient Oxygen Reduction,2025,KOREAN JOURNAL OF CHEMICAL ENGINEERING,42,14,,3395,3403,9,0,10.1007/s11814-025-00488-z,,"[Cho, Yoonbin; Park, Subin; Oh, Sion; Kim, Myeong-Geun; Yoo, Sung Jong] Korea Inst Sci & Technol KIST, Ctr Hydrogen & Fuel Cells, 5 Hwarang Ro 14 Gil, Seoul 02792, South Korea; [Cho, Yoonbin; Kang, Jin Soo] Seoul Natl Univ, Dept Energy Syst Engn, Seoul 08826, South Korea; [Oh, Sion] Kyung Hee Univ, KHU KIST Dept Converging Sci & Technol, 26 Kyungheedae Ro, Seoul 02447, South Korea; [Kang, Jin Soo] Seoul Natl Univ, Dept Energy Resources Engn, Seoul 08826, South Korea; [Kang, Jin Soo] Seoul Natl Univ, Res Inst Energy & Resources, Seoul 08826, South Korea; [Kang, Jin Soo] Inst Basic Sci IBS, Ctr Nanoparticle Res, Seoul 08826, South Korea; [Kim, Myeong-Geun; Yoo, Sung Jong] Univ Sci & Technol UST, KIST Sch, Div Energy & Environm Technol, Daejeon 34113, South Korea",,"Enhancing the active site density of metal-nitrogen-carbon (M-NC) catalysts is critical for improving their oxygen reduction reaction (ORR) performance in proton exchange membrane fuel cells (PEMFCs). In this study, we report a two-dimensional (2D) Fe-NC sheet catalyst designed to maximize active site exposure through structural engineering. Unlike conventional three-dimensional (3D) Fe-NC catalysts, the 2D Fe-NC sheet exhibits a significantly higher surface area and increased Fe-N4 site density, leading to enhanced ORR kinetics. The expanded electrochemical interface and improved active site accessibility contribute to superior site utilization and mass transport properties. Electrochemical evaluations confirm that the 2D Fe-NC sheet outperforms its 3D counterpart in ORR activity, demonstrating higher half-wave potential and turnover frequency. Furthermore, PEMFC single-cell tests reveal that the 2D Fe-NC sheet achieves comparable performance to previously reported M-NC catalysts, particularly when combined with 3D structures to mitigate aggregation effects. This study highlights the importance of morphology engineering in optimizing M-NC catalysts for efficient PEMFC applications.",Fuel cell; Oxygen reduction reaction; Electrocatalyst; M-N-C; 2D structure,CATALYSTS,Fuel cell;Oxygen reduction reaction;Electrocatalyst;M-N-C;2D structure;CATALYSTS,mgkim@kist.re.kr; ysj@kist.re.kr,,"F.5, 119, ANAM-RO, SEONGBUK-GU, SEOUL 136-075, SOUTH KOREA",,,,KOREAN INSTITUTE CHEMICAL  ENGINEERS,0256-1115,,,,English,KOREAN J CHEM ENG,Article,WoS,Chemistry; Engineering,WOS:001503463600001,2-s2.0-105007320942,South Korea,kist.re.kr,Korea Inst Sci & Technol KIST;Seoul Natl Univ;Kyung Hee Univ;Inst Basic Sci IBS;Univ Sci & Technol UST,"Korea Inst Sci & Technol KIST, South Korea;Seoul Natl Univ, South Korea;Kyung Hee Univ, South Korea;Inst Basic Sci IBS, South Korea;Univ Sci & Technol UST, South Korea","Cho, Yoonbin; Park, Subin; Oh, Sion; Kang, Jin Soo; Kim, Myeong-Geun; Yoo, Sung Jong"
"Martinaiou, I., Daletou, M.K.",Enhancing Electrode Efficiency in Proton Exchange Membrane Fuel Cells with PGM-Free Catalysts: A Mini Review,2024,ENERGIES,17,14,3443,,,26,8,10.3390/en17143443,,"[Martinaiou, Ioanna; Daletou, Maria K.] Fdn Res & Technol Hellas FORTH, Inst Chem Engn Sci ICEHT, Stadiou Str, GR-26504 Platani Rion, Greece",,"Proton Exchange Membrane Fuel Cells (PEMFCs) represent a promising green solution for energy production, traditionally relying on platinum-group-metal (PGM) electrocatalysts. However, the increasing cost and limited global availability of PGMs have motivated extensive research into alternative catalyst materials. PGM-free oxygen reduction reaction (ORR) catalysts typically consist of first-row transition metal ions (Fe, Co) embedded in a nitrogen-doped carbon framework. Key factors affecting their efficacy include intrinsic activity and catalyst degradation. Thus, alternative materials with improved characteristics and the elucidation of reaction and degradation mechanisms have been the main concerns and most frequently explored research paths. High intrinsic activity and active site density can ensure efficient reaction rates, while durability towards corrosion, carbon oxidation, demetallation, and deactivation affects cell longevity. However, when moving to the actual application in PEMFCs, electrode engineering, which involves designing the catalyst layer, and other critical operational factors affecting fuel cell performance play a critical role. Electrode fabrication parameters such as ink formulation and deposition techniques are thoroughly discussed herein, explicating their impact on the electrode microstructure and formed electrochemical interface and subsequent performance. Adjusting catalyst loading, ionomer content, and porosity are part of the optimization. More specifically, porosity and hydrophobicity determine reactant transport and water removal. High catalyst loadings can enhance performance but result in thicker layers that hinder mass transport and water management. Moreover, the interaction between ionomer and catalyst affects proton conductivity and catalyst utilization. Strategies to improve the three-phase boundary through the proper ionomer amount and distribution influence catalyst utilization and water management. It is critical to find the right balance, which is influenced by the catalyst-ionomer ratio and affinity, the catalyst properties, and the layer fabrication. Overall, understanding how composition and fabrication parameters impact electrode properties and behaviour such as proton conductivity, mass transport, water management, and electrode-electrolyte interfaces is essential to maximize electrochemical performance. This review highlights the necessity for integrated approaches to unlock the full potential of PGM-free materials in PEMFC technology. Clear prospects for integrating PGM-free catalysts will drive cleaner and more cost-effective, sustainable, and commercially viable energy solutions.",PEMFC; oxygen reduction reaction; PGM-free catalysts; electrode engineering; electrochemical performance,OXYGEN REDUCTION REACTION; N-C CATALYSTS; METAL-FREE ELECTRODES; ACTIVE-SITES; CARBON CATALYSTS; FE/N/C-CATALYSTS; MASS-TRANSPORT; PERFORMANCE; IRON; FE,PEMFC;oxygen reduction reaction;PGM-free catalysts;electrode engineering;electrochemical performance;N-C CATALYSTS;METAL-FREE ELECTRODES;ACTIVE-SITES;CARBON CATALYSTS;FE/N/C-CATALYSTS;MASS-TRANSPORT;PERFORMANCE;IRON;FE,imartinaiou@iceht.forth.gr; riadal@iceht.forth.gr,,"MDPI AG, Grosspeteranlage 5, CH-4052 BASEL, SWITZERLAND",,,,MDPI,,,,,English,ENERGIES,Review,WoS,Energy & Fuels,WOS:001277618600001,,Greece,iceht.forth.gr,Fdn Res & Technol Hellas FORTH,"Fdn Res & Technol Hellas FORTH, Greece","Martinaiou, Ioanna; Daletou, Maria K."
"Rahbarshendi, F., Charkhesht, V., Mojarrad, N.R., Cetiner, B., Kaplan, B.Y.",Enhancing PEM fuel cell performance and durability with CeO2-Modified Fe-N-C hollow-fiber cathodes,2025,ELECTROCHIMICA ACTA,541,,147329,,,10,0,10.1016/j.electacta.2025.147329,,"[Rahbarshendi, Faezeh; Charkhesht, Vahid] Sabanci Univ, Fac Engn & Nat Sci, TR-34956 Istanbul, Turkiye; [Mojarrad, Naeimeh Rajabalizadeh; Cetiner, Busra; Kaplan, Begum Yarar] Sabanci Univ, Nanotechnol Res & Applicat Ctr SUNUM, TR-34956 Istanbul, Turkiye",,"In this study, Fe-N-C catalyst-based hollow-fiber cathodes were fabricated via a core-shell electrospinning technique to increase surface area, promote uniform catalyst and Nafion (R) distribution, and achieve highly conductive and porous cathode structures for proton exchange membrane (PEM) fuel cells. Morphological analysis confirmed the successful fabrication of Fe-N-C hollow-fiber cathodes with a highly porous structure, as verified by porosimetry. Membrane electrode assemblies (MEAs) incorporating these cathodes (3.0 mg.cm(-2) Fe-N-C) were evaluated for fuel cell performance and durability and compared to MEAs using air-sprayed and single-fiber cathodes. The effect of cerium oxide (CeO2) as a radical scavenger was also investigated to improve durability of the electrode. Among the tested configurations, hollow-fiber cathodes with CeO2 exhibited superior performance, achieving a peak power density of 96.1 mW.cm-2 at end-of-test (EOT) with a 14.4 % improvement compared to CeO2-free cathode. Single-fiber cathodes with CeO2 also showed enhanced performance, attributed to reduced hydrogen peroxide (H2O2) formation. Electrochemical impedance spectroscopy (EIS) confirmed the role of CeO2 in suppressing H2O2 formation, thereby improving both performance and durability. These results highlight the potential of CeO2-modified Fe-N-C hollow-fiber cathodes as promising cathode materials for PEM fuel cells.",Fe-N-C catalyst; CeO2 additive; Core-shell electrospinning; Hollow fibers; PEM fuel cells,OXYGEN REDUCTION; FREE CATALYST; TEMPERATURE; MEMBRANE; OXIDE,Fe-N-C catalyst;CeO2 additive;Core-shell electrospinning;Hollow fibers;PEM fuel cells;OXYGEN REDUCTION;FREE CATALYST;TEMPERATURE;MEMBRANE;OXIDE,begumyarar@sabanciuniv.edu,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:001583620700002,2-s2.0-105015092799,Turkiye,sabanciuniv.edu,Sabanci Univ,"Sabanci Univ, Turkiye","Rahbarshendi, Faezeh; Charkhesht, Vahid; Mojarrad, Naeimeh Rajabalizadeh; Cetiner, Busra; Kaplan, Begum Yarar"
"Herranz, J., Lefevre, M., Dodelet, J.P.",Enhancing the performance of non-noble metal catalysts for the reduction of o2 in pem fuel cells: Is the adsorption of iron the limiting factor for increasing the site density of the catalysts?,2009,ECS Transactions,16,2 PART 1,,431,441,,0,10.1149/1.2981877,https://www.scopus.com/inward/record.uri?eid=2-s2.0-63149196610&doi=10.1149%2F1.2981877&partnerID=40&md5=052d58758ea6a115db89f444796d48b0,"Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada","Herranz, Juan, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Lefèvre, Michel, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Dodelet, Jean Pol, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada","The adsorption of iron II acetate over two microporous carbon blacks of different surface properties was studied in order to determine if the maximum of iron II adsorption from solution limits the activity of Fe/N/C catalysts for ORR made with these carbon supports. Whereas one of these carbons only had oxygenderived functionalities over its surface, the other one contained both oxygen and nitrogen bearing functionalities. Their points of zero charge (PZC) were first determined to be 3.9 and 8.8, respectively. Adsorption curves showing the evolution of the metallic uptake with the pH revealed that both carbon supports are able to adsorb 100% of the positive Fe ions in solution at pH>4, and this up to 0.8 wt% Fe. Therefore, the adsorption of iron is not the factor responsible for the limited site density of Fe/N/C catalysts having a Fe content ≤ 0.8 wt% loaded either by adsorption or by wet-impregnation of the carbon supports. The uptake of the cationic iron appears to be exclusively induced by the oxygen groups on the carbon surface. © The Electrochemical Society.",,Adsorption; Carbon; Catalyst activity; Gas fuel purification; Microporosity; Oxygen; Precious metals; Proton exchange membrane fuel cells (PEMFC); Adsorption curves; Adsorption from solution; Carbon support; Carbon surface; Micro-porous carbons; Non-noble metal catalysts; Oxygen and nitrogens; Wet impregnation; Iron compounds,Adsorption;Carbon;Catalyst activity;Gas fuel purification;Microporosity;Oxygen;Precious metals;Proton exchange membrane fuel cells (PEMFC);Adsorption curves;Adsorption from solution;Carbon support;Carbon surface;Micro-porous carbons;Non-noble metal catalysts;Oxygen and nitrogens;Wet impregnation;Iron compounds,,,,"Proton Exchange Membrane Fuel Cells 8, PEMFC - 214th ECS Meeting",,,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-63149196610,,Canada,No email,,,"Herranz, J.; Lefevre, M.; Dodelet, J.-P."
"Primbs, M., Sun, Y., Roy, A., Malko, D., Mehmood, A., Sougrati, M.T., Blanchard, P.Y., Granozzi, G., Kosmala, T., Daniel, G., Atanassov, P., Sharman, J., Durante, C., Kucernak, A., Jones, D., Jaouen, F., Strasser, P.",Establishing reactivity descriptors for platinum group metal (PGM)-free Fe-N-C catalysts for PEM fuel cells,2020,Energy and Environmental Science,13,8,,2480,2500,,270,10.1039/d0ee01013h,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85089890650&doi=10.1039%2Fd0ee01013h&partnerID=40&md5=250b878aa4c97a192b13b62a1361e3e7,"Department of Chemistry, Technische Universität Berlin, Berlin, Germany; Université de Montpellier, Montpellier, Occitanie, France; Department of Chemistry, Imperial College London, London, United Kingdom; Department of Chemical Sciences, Università degli Studi di Padova, Padua, PD, Italy; National Fuel Cell Research Center, Samueli School of Engineering, Irvine, CA, United States; Johnson Matthey Plc, London, United Kingdom","Primbs, Mathias J.M., Department of Chemistry, Technische Universität Berlin, Berlin, Germany; Sun, Yanyan, Department of Chemistry, Technische Universität Berlin, Berlin, Germany; Roy, Aaron, Université de Montpellier, Montpellier, Occitanie, France; Malko, Daniel, Department of Chemistry, Imperial College London, London, United Kingdom; Mehmood, Asad, Department of Chemistry, Imperial College London, London, United Kingdom; Sougrati, Moulay T., Université de Montpellier, Montpellier, Occitanie, France; Blanchard, Pierre Yves, Université de Montpellier, Montpellier, Occitanie, France; Granozzi, Gaetano, Department of Chemical Sciences, Università degli Studi di Padova, Padua, PD, Italy; Kosmala, Tomasz, Department of Chemical Sciences, Università degli Studi di Padova, Padua, PD, Italy; Daniel, Giorgia, Department of Chemical Sciences, Università degli Studi di Padova, Padua, PD, Italy; Atanassov, Plamen B., National Fuel Cell Research Center, Samueli School of Engineering, Irvine, CA, United States; Sharman, Jonathan D.B., Johnson Matthey Plc, London, United Kingdom; Durante, Christian, Department of Chemical Sciences, Università degli Studi di Padova, Padua, PD, Italy; Kucernak, A. R.J., Department of Chemistry, Imperial College London, London, United Kingdom; Jones, Deborah Jacqueline, Université de Montpellier, Montpellier, Occitanie, France; Jaouen, Frédéric, Université de Montpellier, Montpellier, Occitanie, France; Strasser, Peter, Department of Chemistry, Technische Universität Berlin, Berlin, Germany","We report a comprehensive analysis of the catalytic oxygen reduction reaction (ORR) reactivity of four of today's most active benchmark platinum group metal-free (PGM-free) iron/nitrogen doped carbon electrocatalysts (Fe-N-Cs). Our analysis reaches far beyond previous such attempts in linking kinetic performance metrics, such as electrocatalytic mass-based and surface area-based catalytic activity with previously elusive kinetic metrics such as the active metal site density (SD) and the catalytic turnover frequency (TOF). Kinetic ORR activities, SD and TOF values were evaluated using in situ electrochemical NO2- reduction as well as an ex situ gaseous CO cryo chemisorption. Experimental ex situ and in situ Fe surface site densities displayed remarkable quantitative congruence. Plots of SD versus TOF (""reactivity maps"") are utilized as new analytical tools to deconvolute ORR reactivities and thus enabling rational catalyst developments. A microporous catalyst showed large SD values paired with low TOF, while mesoporous catalysts displayed the opposite. Trends in Fe surface site density were linked to molecular nitrogen and Fe moieties (D1 and D2 from 57Fe Mössbauer spectroscopy), from which pore locations of catalytically active D1 and D2 sites were established. This cross-laboratory analysis, its employed experimental practices and analytical methodologies are expected to serve as a widely accepted reference for future, knowledge-based research into improved PGM-free fuel cell cathode catalysts. © 2020 The Royal Society of Chemistry.",,Electrocatalysts; Electrolytic reduction; Iron; Iron compounds; Iron metallography; Kinetics; Knowledge based systems; Metal analysis; Oxygen reduction reaction; Platinum; Proton exchange membrane fuel cells (PEMFC); Analytical methodology; Comprehensive analysis; Laboratory analysis; Mesoporous catalysts; Platinum group metals; Reactivity descriptors; Ssbauer spectroscopies; Surface site density; Catalyst activity; catalyst; electrode; fuel cell; molecular analysis; nitrogen; platinum group element; quantitative analysis; reduction,Electrocatalysts;Electrolytic reduction;Iron;Iron compounds;Iron metallography;Kinetics;Knowledge based systems;Metal analysis;Oxygen reduction reaction;Platinum;Proton exchange membrane fuel cells (PEMFC);Analytical methodology;Comprehensive analysis;Laboratory analysis;Mesoporous catalysts;Platinum group metals;Reactivity descriptors;Ssbauer spectroscopies;Surface site density;Catalyst activity;catalyst;electrode;fuel cell;molecular analysis;nitrogen;platinum group element;quantitative analysis;reduction,"P. Strasser; Department of Chemistry, Chemical Engineering Division, Technical University of Berlin, Berlin, 10623, Germany; email: pstrasser@tu-berlin.de; D. Jones; ICGM, Univ., Montpellier, ENSCM, Montpellier, France; email: Deborah.Jones@umontpellier.fr; F. Jaouen; ICGM, Univ., Montpellier, ENSCM, Montpellier, France; email: frederic.jaouen@umontpellier.fr; A. Kucernak; Department of Chemistry, Imperial College London South Kensington, London, SW7 2AZ, United Kingdom; email: anthony@imperial.ac.uk; C. Durante; Department of Chemical Sciences, University of Padova, Padova, Via Marzolo 1, 35131, Italy; email: christian.durante@unipd.it; J. Sharman; Johnson Matthey Technology Center, Blount's Court Sonning Common, Reading, RG4 9NH, United Kingdom; email: jonathan.sharman@matthey.com",,,,,,Royal Society of Chemistry orders@rsc.org,17545692,,,,English,Energy Environ. Sci.,Article,Scopus,,2-s2.0-85089890650,,Germany;France;United Kingdom;Italy;United States,tu-berlin.de,,,"Primbs, M.; Sun, Y.; Roy, A.; Malko, D.; Mehmood, A.; Sougrati, M.T.; Blanchard, P.-Y.; Granozzi, G.; Kosmala, T.; Daniel, G.; Atanassov, P.; Sharman, J.; Durante, C.; Kucernak, A.; Jones, D.; Jaouen, F.; Strasser, P."
"Muthukrishnan, A., Nabae, Y.",Estimation of the rate constants for the 2×2-electron ORR by combining the voltammograms of O2 and H2O2 reduction reactions,2016,ECS Transactions,75,14,,869,874,,3,10.1149/07514.0869ecst,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84991677395&doi=10.1149%2F07514.0869ecst&partnerID=40&md5=f48288b3b4d54bfe21287962c58be598,"Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan","Muthukrishnan, Azhagumuthu, Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; Nabae, Yuta, Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan","A modified-Damjanovic model was developed in order to estimate the real rate constants from the overestimated ones on the Fe-N/C catalyst. The metal-free N/C catalyst did not show good catalytic activity towards H<inf>2</inf>O<inf>2</inf> reduction reaction, indicating the need of Fe for the follow up H2O2 reduction reaction in the 2×2-electron ORR. The H<inf>2</inf>O<inf>2</inf> reduction rate constants on Fe-N/C catalyst were used to extract the real rate constants. © 2016 The Electrochemical Society.",,Catalyst activity; Electrolytic reduction; Oxygen reduction reaction; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Follow up; Metal free; Reduction rate; Reduction reaction; Voltammograms; Rate constants,Catalyst activity;Electrolytic reduction;Oxygen reduction reaction;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Solid electrolytes;Follow up;Metal free;Reduction rate;Reduction reaction;Voltammograms;Rate constants,,"Jones, D.J.; Uchida, H.; Gasteiger, H.A.; Swider-Lyons, K.; Buchi, F.N.; Pintauro, P.N.; Pivovar, B.S.; Ayers, K.E.; Perry, K.A.; Shirvanian, P.; Weber, A.Z.; Ramani, V.K.; Strasser, P.; Mantz, R.A.; Shinohara, K.; Mitsushima, S.; Coutanceau, C.; Fenton, J.M.; Schmidt, T.J.; Fuller, T.F.; Narayanan, S.R.; Kim, Y.T.; Zhuang, L.; Sun, S.G.",,"Symposium on Polymer Electrolyte Fuel Cells 16, PEFC 2016 - PRiME 2016/230th ECS Meeting",Honolulu,2016-10-02 through 2016-10-07,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-84991677395,,Japan,No email,,,"Muthukrishnan, A.; Nabae, Y."
"Hubert, M.A., King, L.A., Jaramillo, T.F.",Evaluating the Case for Reduced Precious Metal Catalysts in Proton Exchange Membrane Electrolyzers,2022,ACS Energy Letters,7,1,,17,23,,114,10.1021/acsenergylett.1c01869,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85120480907&doi=10.1021%2Facsenergylett.1c01869&partnerID=40&md5=ea9ed4d3eb1aa42bb4d167b1fbc07cbf,"SUNCAT Center for Interface Science and Catalysis, Stanford, CA, United States; Faculty of Science and Engineering, Manchester Metropolitan University, Manchester, Greater Manchester, United Kingdom; Manchester Metropolitan University, Manchester, Greater Manchester, United Kingdom; SUNCAT Center for Interface Science and Catalysis, Stanford, CA, United States","Hubert, McKenzie A., SUNCAT Center for Interface Science and Catalysis, Stanford, CA, United States; King, Laurie A., Faculty of Science and Engineering, Manchester Metropolitan University, Manchester, Greater Manchester, United Kingdom, Manchester Metropolitan University, Manchester, Greater Manchester, United Kingdom; Jaramillo, Thomas Francisco, SUNCAT Center for Interface Science and Catalysis, Stanford, CA, United States, SUNCAT Center for Interface Science and Catalysis, Stanford, CA, United States","Proton exchange membrane (PEM) water electrolyzers are a key technology in decarbonizing hydrogen production. Though the market for PEM electrolyzer systems is growing, there are concerns that the cost and availability of precious metal catalysts utilized in today’s commercial systems can limit deployment. Herein, we show that while the availability of Ir should not impede deployment in the near term, the inelasticity of the Ir commodity price is cause for immediate concern. We emphasize that diversifying catalyst materials, even with other precious metals, can reduce system costs and mitigate supply chain risk. Furthermore, we analyze the trade-offs between catalyst capital cost and catalyst activity for a range of operating conditions (i.e., capacity factor, electricity price). The framework presented herein is a first step toward establishing performance targets (i.e., activity, stability, material cost) for reduced precious metal and non-precious metal catalysts as a function of PEM electrolyzer operating conditions. © 2021 American Chemical Society",,Catalyst activity; Commerce; Cost reduction; Economic and social effects; Hydrogen production; Precious metals; Proton exchange membrane fuel cells (PEMFC); Supply chains; Catalyst material; Commercial systems; Commodity prices; Decarbonising; Electrolyzers; Key technologies; Operating condition; Precious-metal catalysts; Proton exchange membrane electrolyzers; Proton exchange membranes; Electrolytic cells,Catalyst activity;Commerce;Cost reduction;Economic and social effects;Hydrogen production;Precious metals;Proton exchange membrane fuel cells (PEMFC);Supply chains;Catalyst material;Commercial systems;Commodity prices;Decarbonising;Electrolyzers;Key technologies;Operating condition;Precious-metal catalysts;Proton exchange membrane electrolyzers;Proton exchange membranes;Electrolytic cells,"T.F. Jaramillo; SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, 94305, United States; email: jaramillo@stanford.edu",,,,,,American Chemical Society,,,,,English,ACS Energy Lett.,Article,Scopus,,2-s2.0-85120480907,,United States;United Kingdom,stanford.edu,,,"Hubert, M.A.; King, L.A.; Jaramillo, T.F."
"Fukunaga, H., Shimoyama, T., Takahashi, N., Takatsuka, T., Kishimoto, H.",Evaluation of Nitrogen Species and Microstructre of Silk-Derived Activated Carbon as Non-Precious Metal Catalyst for PEFC Cathode,2013,ECS Transactions,50,2,,1831,1838,,1,10.1149/05002.1831ecst,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84885767364&doi=10.1149%2F05002.1831ecst&partnerID=40&md5=143a95fc08c1cd69a8fde39afbe594aa,"Department of Fine Materials Engineering, Shinshu University, Matsumoto, Nagano, Japan; Dai Nippon Printing Co., Ltd., Tokyo, Tokyo, Japan","Fukunaga, Hiroshi, Department of Fine Materials Engineering, Shinshu University, Matsumoto, Nagano, Japan; Shimoyama, T., Department of Fine Materials Engineering, Shinshu University, Matsumoto, Nagano, Japan; Takahashi, Nobuhide, Department of Fine Materials Engineering, Shinshu University, Matsumoto, Nagano, Japan; Takatsuka, Toru, Department of Fine Materials Engineering, Shinshu University, Matsumoto, Nagano, Japan; Kishimoto, Hiroshi, Dai Nippon Printing Co., Ltd., Tokyo, Tokyo, Japan","Silk-derived activated carbon (SAC) was prepared by steam activation and milling process. SAC yield increased by using milling process instead of steam activation. However, surface area decreased. By ball milling process, nitrogen and oxygen species, which existed inside the as-prepared SAC, appeared at the surface, thus decreasing ORR activity. ORR activity recovered by sintering after milling. By ammonia treatment of SAC, atomic ratio of nitrogen (expecially pyridine-type) increased. Change in graphitetype nitrogen was small. E <inf>ORR</inf> showed little change with and without ammonia treatment. Oxygen reduction current showed remarkable increase, due to increase in surface area. The results suggest that, for SAC, E<inf>ORR</inf> is dominated by the degree of carbonization and current is dominated by the surface area. © The Electrochemical Society.",,Activated carbon; Ammonia; Ball milling; Carbonization; Catalysts; Chemical activation; Electrolytic reduction; Milling (machining); Nitrogen; Oxygen; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Silk; Sintering; Ammonia treatment; Ball milling process; Milling process; Nitrogen species; Non-precious metal catalysts; Oxygen reduction currents; Oxygen species; Steam activation; Solid electrolytes,Activated carbon;Ammonia;Ball milling;Carbonization;Catalysts;Chemical activation;Electrolytic reduction;Milling (machining);Nitrogen;Oxygen;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Silk;Sintering;Ammonia treatment;Ball milling process;Milling process;Nitrogen species;Non-precious metal catalysts;Oxygen reduction currents;Oxygen species;Steam activation;Solid electrolytes,,,,"12th Polymer Electrolyte Fuel Cell Symposium, PEFC 2012 - 222nd ECS Meeting",,,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-84885767364,,Japan,No email,,,"Fukunaga, H.; Shimoyama, T.; Takahashi, N.; Takatsuka, T.; Kishimoto, H."
"Tolosana-Moranchel, A., Bibent, N., de la Fuente, J.L.G., Sougrati, M.T., Jaouen, F., Gianolio, D., Retuerto, M., Rojas, S.",Evaluation of the performance and detection of the oxygen reduction reaction kinetics of metal doped imine framework in proton exchange membrane fuel cells,2025,CATALYSIS TODAY,456,,115320,,,12,0,10.1016/j.cattod.2025.115320,,"[Tolosana-Moranchel, Alvaro; de la Fuente, Jose Luis Gomez; Retuerto, Maria; Rojas, Sergio] CSIC, Inst Catalisis & Petroleoquim, Grp Energia & Quim Sostenibles, Marie Curie 2, Madrid 28049, Spain; [Bibent, Nicolas; Sougrati, Moulay Tahar; Jaouen, Frederic] Univ Montpellier, ICGM, CNRS, ENSCM, F-34293 Montpellier, France; [Gianolio, Diego] Diamond Light Source, Harwell Sci & Innovat Campus, Didcot OX11 0DE, England",,"Fe/N/C based catalysts are the best positioned ones to replace the state-of-the-art Pt-based catalysts for the oxygen reduction reaction (ORR) in Proton Exchange Membrane Fuel Cells (PEMFCs). Here, a Fe/N/C catalyst characterized by a high N/C ratio, has been synthesized from the pyrolysis of a N-rich imine-based polymer. In acidic electrolyte (0.1 M HClO4) the catalyst demonstrates notable ORR activity with Eonset and E1/2 values of 1.09 and 0.77 V vs. RHE, respectively. Furthermore, the catalyst's performance has been assessed in a single cell PEMFC setup. The optimization of the membrane electrode assembly (MEA) with the Fe/N/C catalyst entails examining various ionomer to catalyst ratios (I/C) as well as two coating methods: spray coating and drop casting. The optimized MEA achieved a cell performance of 725 mA cm-2 at 0.3 V and a power density close to 220 mW cm-2. In order to understand the factors influencing PEMFC polarisation curves, electrochemical impedance spectroscopy (EIS) was performed under potentiostatic conditions. The effect of operational parameters, such as ionomer to catalyst ratios (I/C) and the use of either O2 or air at the anode feed, has been investigated. EIS spectra allow the calculation of the distribution of relaxation times (DRT), providing insights into the rate and resistance of the ORR process occurring at the MEA. Notably, the cathode with an I/C= 2, prepared by drop casting, exhibited superior performance attributed to reduced ORR resistances. The current density and power density reached with the 25 cm2 MEA are comparable to those obtained with the 5 cm2 MEA using O2 as cathode reactant.",Fe/N/C; ORR; PGM-free; PEMFC; Imine-based framework; Distribution of relaxation times,ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; MASS-TRANSPORT LIMITATIONS; GAS-DIFFUSION ELECTRODES; N-C CATALYSTS; RELAXATION-TIMES; TRANSIENT TECHNIQUES; POLYMER; SITES,Fe/N/C;ORR;PGM-free;PEMFC;Imine-based framework;Distribution of relaxation times;ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY;MASS-TRANSPORT LIMITATIONS;GAS-DIFFUSION ELECTRODES;N-C CATALYSTS;RELAXATION-TIMES;TRANSIENT TECHNIQUES;POLYMER;SITES,alvaro.tolosana@csic.es,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0920-5861,,,,English,CATAL TODAY,Article,WoS,Chemistry; Engineering,WOS:001478901200001,2-s2.0-105003192713,Spain;France;United Kingdom,csic.es,CSIC;Univ Montpellier;Diamond Light Source,"CSIC, Spain;Univ Montpellier, France;Diamond Light Source, United Kingdom","Tolosana-Moranchel, Alvaro; Bibent, Nicolas; de la Fuente, Jose Luis Gomez; Sougrati, Moulay Tahar; Jaouen, Frederic; Gianolio, Diego; Retuerto, Maria; Rojas, Sergio"
"Fu, X.G., Gao, R., Jiang, G.P., Li, M., Li, S., Luo, D., Hu, Y.F., Yuan, Q.X., Huang, W.X., Zhu, N., Yang, L., Mao, Z.Y., Xiong, J.W., Yu, A.P., Chen, Z.W., Bai, Z.Y.",Evolution of atomic-scale dispersion of FeNx in hierarchically porous 3D air electrode to boost the interfacial electrocatalysis of oxygen reduction in PEMFC,2021,NANO ENERGY,83,,105734,,,12,59,10.1016/j.nanoen.2020.105734,,"[Fu, Xiaogang; Yang, Lin; Bai, Zhengyu] Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Fine Chem Green, Sch Chem & Chem Engn,Minist Educ, Key Lab Green Chem Media & React, Xinxiang 453007, Henan, Peoples R China; [Fu, Xiaogang; Gao, Rui; Jiang, Gaopeng; Li, Matthew; Li, Shuang; Luo, Dan; Yu, Aiping; Chen, Zhongwei] Univ Waterloo, Waterloo Inst Nanotechnol, Dept Chem Engn, 200 univ Ave W, Waterloo, ON N2L 3G1, Canada; [Hu, Yongfeng; Zhu, Ning] Univ Saskatchewan, Canadian Light Source, Saskatoon, SK S7N 0X4, Canada; [Yuan, Qingxi; Huang, Wanxia] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China; [Mao, Zhiyu; Xiong, Junwei] WenZhou JiuYuan Li Battery Technol Dev Co LTD, Wenzhou, Peoples R China",,"Metal-nitrogen-carbon (M-N-C) materials show great advantages for catalyzing the oxygen reduction reaction (ORR) in proton-exchange membrane fuel cells (PEMFCs). However, both the low density of single atomic (SA) MNx active sites and restricted mass transfer render these M-N-C based air electrodes inferior in cell performance. In this study, a new ZIF8-derived Fe-N-C catalyst/electrode design combining local chemistry tuning and primary morphology tailoring to address the above two critical issues is shown. The introduction of nitrogencarbon defects in ZIF8 host enables a controlled atomic-scale dispersion of FeNx moieties, increasing their content in support materials. Also, the simultaneous structural arrangement of individual ZIF8 nano-grains endows the catalyst with a unique porous micro-spheric morphology. This result in an advanced 3D air electrode featuring dense SA FeNx sites and ample, multiscale macro-sized pore channels, which can significantly increase the intrinsic catalytic activity, facilitate bulk mass transport, and generate more effective triple-phase interfaces for ORR. The present catalyst/electrode design exhibits a record large peak power density of ca. 0.60 W cm-2 under practical air conditions. This approach provides a feasible way for boosting the air cathode interfacial ORR and further enlightens electrode designs for energy devices involving multiphase electrochemical reactions.",FeNx active sites; Oxygen reduction reaction; Hierarchically porous air electrode; Proton exchange membrane fuel cells,N-C CATALYSTS; FUEL-CELL; ACTIVE-SITES; ELECTROCHEMICAL IMPEDANCE; METAL ELECTROCATALYSTS; CATHODE CATALYST; FE/N/C CATALYSTS; CARBON; LAYER; MICROSTRUCTURE,FeNx active sites;Oxygen reduction reaction;Hierarchically porous air electrode;Proton exchange membrane fuel cells;N-C CATALYSTS;FUEL-CELL;ACTIVE-SITES;ELECTROCHEMICAL IMPEDANCE;METAL ELECTROCATALYSTS;CATHODE CATALYST;FE/N/C CATALYSTS;CARBON;LAYER;MICROSTRUCTURE,baizhengyu@htu.edu.cn,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2211-2855,,,,English,NANO ENERGY,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000640489200001,2-s2.0-85100005131,China;Canada,htu.edu.cn,Henan Normal Univ;Univ Waterloo;Univ Saskatchewan;Chinese Acad Sci;WenZhou JiuYuan Li Battery Technol Dev Co LTD,"Henan Normal Univ, China;Univ Waterloo, Canada;Univ Saskatchewan, Canada;Chinese Acad Sci, China;WenZhou JiuYuan Li Battery Technol Dev Co LTD, China","Fu, Xiaogang; Gao, Rui; Jiang, Gaopeng; Li, Matthew; Li, Shuang; Luo, Dan; Hu, Yongfeng; Yuan, Qingxi; Huang, Wanxia; Zhu, Ning; Yang, Lin; Mao, Zhiyu; Xiong, Junwei; Yu, Aiping; Chen, Zhongwei; Bai, Zhengyu"
"Yang, Y.B., Li, Y., Wang, X., Ge, J., Liu, C., Xing, W.",Exploration of anode anti-CO poisoning in proton exchange membrane fuel cell,2021,Journal of Molecular Science,37,6,,527,536,,0,10.13563/j.cnki.jmolsci.2021.04.023,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85218828982&doi=10.13563%2Fj.cnki.jmolsci.2021.04.023&partnerID=40&md5=0489c6ec7db699ab9389211cfc5fa58c,"State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China","Yang, Yuanbo, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Li, Yang, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Wang, Xian, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Ge, Junjie, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Liu, Changpeng, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Xing, Wei, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China","As a feasible technical route to promote the global energy transition, hydrogen energy has gradually become a hot topic in the energy field. At present, the power density of the proton exchange membrane fuel cell (PEMFC) that uses hydrogen as fuel has reached the requirements of practical applications, but the commercialization of hydrogen fuel cell vehicles is restricted by the cost of hydrogen. Industrial by-product hydrogen, natural gas reforming hydrogen production can provide PEMFC with a large amount of lowcost hydrogen, but because the small amount of CO contained therein will significantly poison the anode catalyst of PEMFC, its adsorption on the surface of the catalyst will prevent the adsorption and desorption of hydrogen and hinder the catalytic oxidation of fuel. Therefore, anti-CO poisoning of anode is an unavoidable problem in the process of commercial application of PEMFC. The single-atom catalyst (SAC) is a new type of heterogeneous catalyst with atomically dispersed active centers. It has extremely high atom utilization and excellent reactivity and selectivity. With its excellent performance and low metal cost, SAC has injected strong kinetic energy into the development of the field of anti-CO poisoning. The CO poisoning resistance of PEMFC should essentially be started from the perspective of catalysts. Adopting various methods to promote the catalytic oxidation of CO by a single atom will be the main direction of future research. There are two main ideas for anti-CO poisoning of PEMFC. One is to purify hydrogen-rich gas to remove CO in H<inf>2</inf> in advance; the other is to prepare a new type of anti-CO poisoning electrocatalyst to oxidize CO or reduce the poisoning effect of CO. The above two anti-poisoning from the perspective of catalyst strategy is the current research hotspot. At present, it has been widely accepted that the CO oxidation reaction mechanism is mainly based on the MvK mechanism and the L-H mechanism. Under the acidic conditions related to PEMFC, the traditional anode anti-poisoning electrocatalyst catalyzes the CO oxidation following the L-H mechanism, and its CO resistance receptivity is usually attributed to electronic effects and dual-function mechanisms. In recent years, most reports on the application of SAC in CO poisoning are based on precious metals, such as Pt, Au, Pd, Ir, Rh and Ru, etc. We mainly discuss the above the research progress of precious metal SAC as CO preferential oxidation catalyst and electrocatalyst in the field of anti-CO poisoning, to help clarify the reaction mechanism, and to propose a promising SAC for future practical applications. © 2021, Department of Chemistry, Northeast Normal University. All rights reserved.",Anti-CO poisoning; CO oxidation; Hydrogen anode; Proton exchange membrane fuel cell; Single atom catalyst,,Anti-CO poisoning;CO oxidation;Hydrogen anode;Proton exchange membrane fuel cell;Single atom catalyst,"J.-J. Ge; State Key Laboratory of Electroanalytic Chemistry, Jilin Province Key Laboratory of Low Carbon Chemistry Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: gejj@ciaic.ac.cn; C.-P. Liu; State Key Laboratory of Electroanalytic Chemistry, Jilin Province Key Laboratory of Low Carbon Chemistry Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: liuchp@ciac.ac.cn; W. Xing; State Key Laboratory of Electroanalytic Chemistry, Jilin Province Key Laboratory of Low Carbon Chemistry Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: xingwei@ciac.ac.cn",,,,,,"Department of Chemistry, Northeast Normal University",10009035,,,,Chinese,J. Mol. Sci.,Article,Scopus,,2-s2.0-85218828982,,China,ciaic.ac.cn,,,"Yang, Y.-B.; Li, Y.; Wang, X.; Ge, J.; Liu, C.; Xing, W."
"Chen, S.Q., Xiang, S.L., Tan, Z.H., Li, H.Y., Yan, X.H., Yin, J.W., Shen, S.Y., Zhang, J.L.",Exploration of the oxygen transport behavior in non-precious metal catalyst-based cathode catalyst layer for proton exchange membrane fuel cells,2022,FRONTIERS IN ENERGY,17,1,,123,133,11,10,10.1007/s11708-022-0849-1,,"[Chen, Shiqu; Tan, Zehao; Li, Huiyuan; Yan, Xiaohui; Yin, Jiewei; Shen, Shuiyun; Zhang, Junliang] Shanghai Jiao Tong Univ, Inst Fuel Cells, Sch Mech Engn, Shanghai 200240, Peoples R China; [Xiang, Silei] Tsinghua Univ, Sch Vehicle & Mobil, State Key Lab Automot Safety & Energy, Beijing 100084, Peoples R China",,"High cost has undoubtedly become the biggest obstacle to the commercialization of proton exchange membrane fuel cells (PEMFCs), in which Pt-based catalysts employed in the cathodic catalyst layer (CCL) account for the major portion of the cost. Although non-precious metal catalysts (NPMCs) show appreciable activity and stability in the oxygen reduction reaction (ORR), the performance of fuel cells based on NPMCs remains unsatisfactory compared to those using Pt-based CCL. Therefore, most studies on NPMC-based fuel cells focus on developing highly active catalysts rather than facilitating oxygen transport. In this work, the oxygen transport behavior in CCLs based on highly active Fe-N-C catalysts is comprehensively explored through the elaborate design of two types of membrane electrode structures, one containing low-Pt-based CCL and NPMC-based dummy catalyst layer (DCL) and the other containing only the NPMC-based CCL. Using Zn-N-C based DCLs of different thickness, the bulk oxygen transport resistance at the unit thickness in NPMC-based CCL was quantified via the limiting current method combined with linear fitting analysis. Then, the local and bulk resistances in NPMC-based CCLs were quantified via the limiting current method and scanning electron microscopy, respectively. Results show that the ratios of local and bulk oxygen transport resistances in NPMC-based CCL are 80% and 20%, respectively, and that an enhancement of local oxygen transport is critical to greatly improve the performance of NPMC-based PEMFCs. Furthermore, the activity of active sites per unit in NPMC-based CCLs was determined to be lower than that in the Pt-based CCL, thus explaining worse cell performance of NPMC-based membrane electrode assemblys (MEAs). It is believed that the development of NPMC-based PEMFCs should proceed not only through the design of catalysts with higher activity but also through the improvement of oxygen transport in the CCL.",proton exchange membrane fuel cells (PEMFCs); non-precious metal catalyst (NPMC); cathode catalyst layer (CCL); local and bulk oxygen transport resistance,REDUCTION REACTION; N-C; ORGANIC FRAMEWORK; MASS-TRANSPORT; POROUS CARBON; DOPED CARBON; RESISTANCE; ELECTROCATALYSTS; PERFORMANCE; ALKALINE,proton exchange membrane fuel cells (PEMFCs);non-precious metal catalyst (NPMC);cathode catalyst layer (CCL);local and bulk oxygen transport resistance;REDUCTION REACTION;N-C;ORGANIC FRAMEWORK;MASS-TRANSPORT;POROUS CARBON;DOPED CARBON;RESISTANCE;ELECTROCATALYSTS;PERFORMANCE;ALKALINE,shuiyun_shen@sjtu.edu.cn,,"CHAOYANG DIST, 4, HUIXINDONGJIE, FUSHENG BLDG, BEIJING 100029, PEOPLES R CHINA",,,,HIGHER EDUCATION PRESS,2095-1701,,,,English,FRONT ENERGY,Article,WoS,Energy & Fuels,WOS:000884648300001,2-s2.0-85141952937,China,sjtu.edu.cn,Shanghai Jiao Tong Univ;Tsinghua Univ,"Shanghai Jiao Tong Univ, China;Tsinghua Univ, China","Chen, Shiqu; Xiang, Silei; Tan, Zehao; Li, Huiyuan; Yan, Xiaohui; Yin, Jiewei; Shen, Shuiyun; Zhang, Junliang"
"Shahraei, A., Martinaiou, I., Creutz, K.A., Kubler, M., Weidler, N., Ranecky, S.T., Wallace, W.D.Z., Nowroozi, M.A., Clemens, O., Stark, R.W., Kramm, U.I.",Exploring Active Sites in Multi-Heteroatom-Doped Co-Based Catalysts for Hydrogen Evolution Reactions,2018,CHEMISTRY-A EUROPEAN JOURNAL,24,48,,12480,12484,5,20,10.1002/chem.201802684,,"[Shahraei, Ali; Martinaiou, Ioanna; Kramm, Ulrike I.] Tech Univ Darmstadt, Grad Sch Excellence Energy Sci & Engn, Otto Berndt Str 3, D-64287 Darmstadt, Germany; [Shahraei, Ali; Kuebler, Markus; Wallace, W. David Z.; Kramm, Ulrike I.] Tech Univ Darmstadt, Dept Chem, Otto Berndt Str 3, D-64287 Darmstadt, Germany; [Martinaiou, Ioanna; Creutz, K. Alexander; Weidler, Natascha; Ranecky, Simon T.; Nowroozi, Mohammad Ali; Clemens, Oliver; Stark, Robert W.; Kramm, Ulrike I.] Tech Univ Darmstadt, Dept Mat & Earth Sci, Otto Berndt Str 3, D-64287 Darmstadt, Germany",,"Today, metal-N- as well as metal-S-doped carbon materials are known to catalyze the hydrogen evolution reaction (HER). However, especially N- and S-co-doped catalysts reach highest activity, but it remains unclear if the activity is related to MNx or MSy (M=metal) sites. In this work we apply a simple method for multi-heteroatom doping and investigate the effect of cobalt content on the HER in acidic medium. The CoNx and CoSy sites were evidenced on the basis of structural characterization by Raman, X-ray induced photoelectron spectroscopy, and TEM. The presence of sulfur enables the formation of a larger number of CoNx sites. Structure-performance relationship proves that the HER activity is dominated by CoNx rather than CoSy sites. The most active catalysts also exhibit an excellent stability under galvanostatic conditions making them of interest for electrolyser application.",carbon; cobalt; energy conversion; heterogeneous catalysis; hydrogen evolution reaction; non-precious metal catalysts,OXYGEN-REDUCTION REACTION; PEM FUEL-CELLS; ME-N-C; CARBON NANOTUBES; TRANSITION-METAL; NITROGEN; FE; ELECTROCATALYSTS; NANOPARTICLES; PYROLYSIS,carbon;cobalt;energy conversion;heterogeneous catalysis;hydrogen evolution reaction;non-precious metal catalysts;OXYGEN-REDUCTION REACTION;PEM FUEL-CELLS;ME-N-C;CARBON NANOTUBES;TRANSITION-METAL;NITROGEN;FE;ELECTROCATALYSTS;NANOPARTICLES;PYROLYSIS,kramm@ese.tu-darmstadt.de,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,0947-6539,,,29862591,English,CHEM-EUR J,Article,WoS,Chemistry,WOS:000442846800005,,Germany,ese.tu-darmstadt.de,Tech Univ Darmstadt,"Tech Univ Darmstadt, Germany","Shahraei, Ali; Martinaiou, Ioanna; Creutz, K. Alexander; Kuebler, Markus; Weidler, Natascha; Ranecky, Simon T.; Wallace, W. David Z.; Nowroozi, Mohammad Ali; Clemens, Oliver; Stark, Robert W.; Kramm, Ulrike I."
"Wan, X., Shui, J.L.",Exploring Durable Single-Atom Catalysts for Proton Exchange Membrane Fuel Cells,2022,ACS ENERGY LETTERS,7,5,,1696,1705,10,101,10.1021/acsenergylett.2c00473,,"[Wan, Xin; Shui, Jianglan] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China",,"Exploring low-cost, highly active, and durable oxygen reductioncatalysts is essential for the widespread use of proton exchange membrane fuelcells. Fe-N-C catalysts with nitrogen-coordinated single-atom (Fe-Nx) activesites are the most promising candidates due to their highest activity in acidmedia among platinum-group-metal-free catalysts. However, the application ofFe-N-C catalysts in realistic fuel cells is still hindered by the conundrum ofinsufficient stability. This review focuses on the understanding of thestructure-stability relationship of Fe-N-C catalysts, which provides valuableguidance for the rational material design toward improved stability. The mostsignificant achievements in recent years are the discovery of several site-specificdegradation mechanisms and the identification of intrinsically stable activesites. The development of Fe-free single-atom catalysts is also discussed as analternative solution",,OXYGEN REDUCTION REACTION; N-C CATALYSTS; METAL-ORGANIC-FRAMEWORK; ACTIVE-SITES; CATHODE CATALYSTS; FE; STABILITY; PERFORMANCE; IRON; IDENTIFICATION,OXYGEN REDUCTION REACTION;N-C CATALYSTS;METAL-ORGANIC-FRAMEWORK;ACTIVE-SITES;CATHODE CATALYSTS;FE;STABILITY;PERFORMANCE;IRON;IDENTIFICATION,shuijianglan@buaa.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2380-8195,,,,English,ACS ENERGY LETT,Review,WoS,Chemistry; Electrochemistry; Energy & Fuels; Science & Technology - Other Topics; Materials Science,WOS:000802291300016,2-s2.0-85128862104,China,buaa.edu.cn,Beihang Univ,"Beihang Univ, China","Wan, Xin; Shui, Jianglan"
"Zhang, L., Chen, N., Gao, Z., He, R., Zhang, X., Wang, Y., Xiong, K.",Exploring the synergistic regulation mechanism of N/C coordination and OH ligands on the bifunctional oxygen electrode activity in Co-N-C doped graphene,2025,Applied Surface Science,702,,163298,,,,1,10.1016/j.apsusc.2025.163298,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105003266320&doi=10.1016%2Fj.apsusc.2025.163298&partnerID=40&md5=ad24d728f2eaf00ad4cd2a3f40b7dc0b,"Department of Physics, Kunming Medical University, Kunming, Yunnan, China; Ministry of Education School of Microelectronics, Southern University of Science and Technology, Shenzhen, Guangdong, China; School of Physics and Astronomy, Yunnan University, Kunming, Yunnan, China; Materials Genome Institute, Yunnan University, Kunming, Yunnan, China","Zhang, Linlin, Department of Physics, Kunming Medical University, Kunming, Yunnan, China; Chen, Nan, Ministry of Education School of Microelectronics, Southern University of Science and Technology, Shenzhen, Guangdong, China; Gao, Zhen, School of Physics and Astronomy, Yunnan University, Kunming, Yunnan, China; He, Rui, Department of Physics, Kunming Medical University, Kunming, Yunnan, China; Zhang, Xinyu, Department of Physics, Kunming Medical University, Kunming, Yunnan, China; Wang, Yanning, Department of Physics, Kunming Medical University, Kunming, Yunnan, China; Xiong, Kai, Materials Genome Institute, Yunnan University, Kunming, Yunnan, China","Metal–air batteries and proton exchange membrane fuel cells hold great promise for sustainable energy conversion but are limited by sluggish oxygen reduction and evolution reaction kinetics and high noble metal costs. Transition metal–nitrogen–carbon (M−N−C) materials are economical alternatives; however, the effects of specific coordination environments and hydroxyl ligands on Co–N–C catalysts remain underexplored. Herein, we developed 15 Co–N–C doped graphene models featuring four-coordinate, three-coordinate, and hydroxyl-functionalized sites and systematically investigated their bifunctional catalytic performance via density functional theory (DFT). Our results reveal that in four-coordinate configurations, increasing nitrogen content enhances oxygen intermediate adsorption and lowers the overpotential. In three-coordinate systems, CoN<inf>3</inf> and CoN<inf>2</inf>C<inf>1</inf> exhibit low oxygen evolution reaction (OER) overpotentials (0.32 V and 0.30 V, respectively) through an optimized *OOH dissociation pathway. Additionally, hydroxyl ligands markedly improve oxygen reduction reaction (ORR) kinetics, with Co(OH)N<inf>3</inf> achieving an overpotential of 0.41 V as the OH group acts as an “electron storage site” to modulate Co 3d states, balancing O<inf>2</inf> activation and intermediate desorption. These findings offer a new strategy beyond static coordination tuning, highlighting the potential of dynamic ligand engineering in single-atom catalysts. Overall, our study clarifies the link between coordination structure and catalytic performance, paving the way for further advancements in designing efficient, stable non-precious metal electrocatalysts for sustainable energy applications. © 2025",Co–N–C single atom catalysts; Density Functional Theory (DFT); Hydroxyl Modification; N/C Coordination; Oxygen Evolution Reaction (OER); Oxygen Reduction Reaction (ORR),Bioremediation; Design for testability; Electrolytic reduction; Energy conservation; Metal-air batteries; Oxygen evolution reaction; Oxygen reduction reaction; Photodissociation; Rate constants; Sustainable development; Temperature scales; Co–N–C single atom catalyst; Density functional theory; Density-functional-theory; Evolution reactions; Hydroxyl modification; N/C coordination; Oxygen evolution; Single-atoms; ]+ catalyst; Ligands,Co–N–C single atom catalysts;Density Functional Theory (DFT);Hydroxyl Modification;N/C Coordination;Oxygen Evolution Reaction (OER);Oxygen Reduction Reaction (ORR);Bioremediation;Design for testability;Electrolytic reduction;Energy conservation;Metal-air batteries;Oxygen evolution reaction;Oxygen reduction reaction;Photodissociation;Rate constants;Sustainable development;Temperature scales;Co–N–C single atom catalyst;Density functional theory;Density-functional-theory;Evolution reactions;Oxygen evolution;Single-atoms;]+ catalyst;Ligands,"L. Zhang; Department of Physics, Mathematics and Computer Science, Kunming Medical University, Kunming, China; email: ynuzll@163.com",,,,,,Elsevier B.V.,01694332,0873392558,ASUSE,,English,Appl Surf Sci,Article,Scopus,,2-s2.0-105003266320,,China,163.com,,,"Zhang, L.; Chen, N.; Gao, Z.; He, R.; Zhang, X.; Wang, Y.; Xiong, K."
"Chen, T., Hao, C., Chen, Z., Li, J., Lin, C., Shen, P.K., Tian, Z.Q.",Exposure engineering of active sites of Co-N-C for efficient oxygen reduction reaction,2025,Chemical Engineering Journal,505,,159449,,,,13,10.1016/j.cej.2025.159449,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85214565305&doi=10.1016%2Fj.cej.2025.159449&partnerID=40&md5=f89b7e5d55da787e7f1c76f7538a6c97,"State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China","Chen, Ting, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Hao, Chao, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Chen, Zhenyu, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Li, Jiawang, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Lin, Changqing, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Shen, Peikang, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Tian, Zhiqun, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China","Efficiently exposing active sites of transition metal-nitrogen-carbon (M−N−C) catalysts for the oxygen reduction reaction (ORR) is crucial for developing cost-effective fuel cells and metal-air batteries. Herein, a Co salt-induced strategy of tuning active sites exposure of Co-N-C was developed by pyrolyzing a new precursor of Co2+ coordinated polymer with bis(imino)-pyridine-based ligands, which was synthesized by polymerizing 2,6-diacetylpyridine (DAP) and 2,6-diaminopurine (DAM) via a condensation reaction. Results show that the morphology and active site exposure of the Co-N-C depend significantly on the Co salts used in the precursor. Co-N-C synthesized with Co(NO<inf>3</inf>)<inf>2</inf> exhibits a bamboo-like nanotube structure with CoN<inf>4</inf> moieties embedded at the edges and steps of graphite lattices, offering high electrochemical surface area. Its half-wave potential for ORR is 0.90 V in 0.1 M KOH and 0.76 V in 0.5 M H<inf>2</inf>SO<inf>4</inf>, which are much higher than those of Co-N-C with CoCl<inf>2</inf> featuring nanoplate-like structures. Full cell tests confirm its excellent ORR performance, achieving a maximum power output of 221 mW cm−2 in a Zn-air battery and 408 mW cm−2 in a proton exchange membrane fuel cell. Theoretical calculations reveal that the CoN<inf>4</inf> moiety at the graphite edge has a lower d-band center compared to bulk-hosted CoN<inf>4</inf>, increasing the antibonding orbital filling of Co-OH* bonds and thereby enhancing ORR. Additionally, encapsulated Co nanoparticles further improve ORR through enhanced electron transfer. These findings highlight the crucial role of Co sources in forming Co-N-C with efficiently exposed active sites, offering new insights for advanced M−N−C catalyst design. © 2025 Elsevier B.V.",Edged CoN4 site; Fuel cells; Oxygen reduction reaction; Transition metal-nitrogen-carbon; Zn-Air batteries,Carbon capture and utilization; Carbon sequestration; Cell engineering; Direct air capture; Electrolytic reduction; Oxygen reduction reaction; Potassium hydroxide; Sulfur compounds; Zero-carbon; Active site; Carbon catalysts; Cost effective; Edged CoN4 site; Metal-air battery; Nitrogen-carbon; Site exposure; Synthesised; Transition metal-nitrogen-carbon; Condensation reactions,Edged CoN4 site;Fuel cells;Oxygen reduction reaction;Transition metal-nitrogen-carbon;Zn-Air batteries;Carbon capture and utilization;Carbon sequestration;Cell engineering;Direct air capture;Electrolytic reduction;Potassium hydroxide;Sulfur compounds;Zero-carbon;Active site;Carbon catalysts;Cost effective;Metal-air battery;Nitrogen-carbon;Site exposure;Synthesised;Condensation reactions,"Z.Q. Tian; Collaborative Innovation Center of Sustainable Energy Materials, School of Physical Science and Technology, Guangxi University, Institute of Science and Technology for Carbon Peak & Neutrality, Guangxi Key Laboratory of Electrochemical Energy Materials, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning, 530004, China; email: tianzhiqun@gxu.edu.cn",,,,,,Elsevier B.V.,13858947,,CMEJA,,English,Chem. Eng. J.,Article,Scopus,,2-s2.0-85214565305,,China,gxu.edu.cn,,,"Chen, T.; Hao, C.; Chen, Z.; Li, J.; Lin, C.; Shen, P.K.; Tian, Z.Q."
"Damjanovic, A.M., Freiberg, A.T.S., Siebel, A., Koyuturk, B., Menga, D., Krempl, K., Madkikar, P., Proux, O., Gasteiger, H.A., Piana, M.",Ex situ/Operando X-Ray Absorption Spectroscopy on Fe0.07Zr0.93O2-δ/C vs. Fe-N-C as Pt-Group-Metal-Free Oxygen Reduction Reaction Catalysts in Proton Exchange Membrane Fuel Cells,2023,CHEMELECTROCHEM,10,13,,,,13,6,10.1002/celc.202300185,,"[Damjanovic, Ana Marija; Freiberg, Anna Theresa Sophie; Siebel, Armin; Koyutuerk, Burak; Menga, Davide; Krempl, Kevin; Madkikar, Pankaj; Gasteiger, Hubert Andreas; Piana, Michele] Tech Univ Munich, Chair Tech Electrochem, Catalysis Res Ctr, TUM Sch Nat Sci, D-85748 Garching, Germany; [Proux, Olivier] Univ Grenoble Alpes, Observ Sci Univers Grenoble OSUG, IRD, INRAe,UAR832,CNRS, F-38041 Grenoble, France",,"In this study, ex situ and operando X-ray absorption spectroscopy (XAS) is employed to shed light on structure and degradation mechanism of Fe-based catalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). Ex situ XAS on pristine Fe0.07Zr0.93O2-delta/C catalyst confirms the incorporation of Fe3+ in the ZrO2 structure and clearly exclude any significant presence of Fe-N-C-type structures. The edge shift in data on in-house aged samples demonstrates a mixed oxidation state of Fe (Fe3+ and Fe2+), consistent with Fe demetalation from the ZrO2 structure. Furthermore, a more symmetric coordination in the pre-edge shape points towards the formation of oxidic Fe clusters upon aging. Fe demetalation is inferred also from the edge shift to higher energy (presence of Fe3+) in operando XAS data at 0.3 V, due to Fe phases not electrically polarizable/reducible at the applied voltage. Electrochemical data exclude any correlation between extent of aging and type of test, also for a commercial Fe-N-C catalyst by Pajarito Powder. The observed faster aging for Fe0.07Zr0.93O2-delta compared to Fe-N-C is attributed to an improved mass transport to/from active sites, manifest also in very similar initial current densities at 0.3 V, despite much higher catalyst activity for Fe-N-C.",electrocatalysis; platinum-group-metal free; proton exchange membrane fuel cells; oxygen reduction reaction; operando X-ray absorption spectroscopy,IRON-BASED CATALYSTS; FE/N/C-CATALYSTS; O-2 REDUCTION; IDENTIFICATION; STABILITY; CARBON; SITES; DEGRADATION; ZRO2; ELECTROCATALYSTS,electrocatalysis;platinum-group-metal free;proton exchange membrane fuel cells;oxygen reduction reaction;operando X-ray absorption spectroscopy;IRON-BASED CATALYSTS;FE/N/C-CATALYSTS;O-2 REDUCTION;IDENTIFICATION;STABILITY;CARBON;SITES;DEGRADATION;ZRO2;ELECTROCATALYSTS,michele.piana@tum.de,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,2196-0216,,,,English,CHEMELECTROCHEM,Article,WoS,Electrochemistry,WOS:001000539900001,,Germany;France,tum.de,Tech Univ Munich;Univ Grenoble Alpes,"Tech Univ Munich, Germany;Univ Grenoble Alpes, France","Damjanovic, Ana Marija; Freiberg, Anna Theresa Sophie; Siebel, Armin; Koyutuerk, Burak; Menga, Davide; Krempl, Kevin; Madkikar, Pankaj; Proux, Olivier; Gasteiger, Hubert Andreas; Piana, Michele"
"Gorlin, Y., Jaramillo, T.F.",Ex-situ spectroscopy study of manganese oxide catalytic surfaces under reaction conditions relevant to oxygen reduction and oxygen evolution,2011,ECS Transactions,41,1,,1701,1707,,7,10.1149/1.3635701,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84866387023&doi=10.1149%2F1.3635701&partnerID=40&md5=8ee030073d9abc94cf2c2449768aed69,"Stanford Engineering, Stanford, CA, United States","Gorlin, Yelena, Stanford Engineering, Stanford, CA, United States; Jaramillo, Thomas Francisco, Stanford Engineering, Stanford, CA, United States","In our previous work, we developed a promising non-precious metal catalyst with bifunctional activity for the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER). We identified the catalyst as manganese (III) oxide with some α- Mn<inf>2</inf>O<inf>3</inf> crystallinity in its initial state, but needed to further characterize the catalyst to understand its properties under reaction conditions. In this work, we performed cyclic voltammetry in an inert gas environment to identify electrochemical features of the catalyst and used ex-situ x-ray photoelectron spectroscopy (XPS) to probe the surface oxidation state of manganese after exposing the catalyst to ORR or OER potentials. XPS did not detect a surface oxidation state difference between samples tested at ORR and OER potentials, while electrochemical methods could discern a difference in the oxidation state upon re-insertion of the samples into an electrochemical cell. This result suggested an extremely shallow depth of electrochemical oxidation. © 2011 ECS-The Electrochemical Society.",,Catalyst activity; Crystallinity; Cyclic voltammetry; Electrochemical oxidation; Electrolytic reduction; Inert gases; Manganese metallography; Manganese oxide; Oxygen; Oxygen evolution reaction; Oxygen reduction reaction; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Surface reactions; X ray photoelectron spectroscopy; Bifunctional activity; Catalytic surfaces; Electrochemical features; ELectrochemical methods; Non-precious metal catalysts; Oxygen evolution reaction (oer); Reaction conditions; Surface oxidations; Solid electrolytes,Catalyst activity;Crystallinity;Cyclic voltammetry;Electrochemical oxidation;Electrolytic reduction;Inert gases;Manganese metallography;Manganese oxide;Oxygen;Oxygen evolution reaction;Oxygen reduction reaction;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Surface reactions;X ray photoelectron spectroscopy;Bifunctional activity;Catalytic surfaces;Electrochemical features;ELectrochemical methods;Non-precious metal catalysts;Oxygen evolution reaction (oer);Reaction conditions;Surface oxidations;Solid electrolytes,,,,"11th Polymer Electrolyte Fuel Cell Symposium, PEFC 11 - 220th ECS Meeting",,,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-84866387023,,United States,No email,,,"Gorlin, Y.; Jaramillo, T.F."
"Kim, Y., Asset, T., Wei, F., Atanassov, P., Secanell, M., Barralet, J., Gostick, J.T.",Fabrication of platinum group metal-free catalyst layer with enhanced mass transport characteristics via an electrospraying technique,2021,Materials Today Energy,20,,100641,,,,15,10.1016/j.mtener.2021.100641,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85100458651&doi=10.1016%2Fj.mtener.2021.100641&partnerID=40&md5=5a3373af04d8f4c6a8cf35aa4cad42c4,"Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada; Samueli School of Engineering, Irvine, CA, United States; Department of Mechanical Engineering, University of Alberta, Edmonton, AB, Canada; Faculty of Dentistry, Université McGill, Montreal, QC, Canada","Kim, Yongwook, Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada; Asset, Tristan, Samueli School of Engineering, Irvine, CA, United States; Wei, Fei, Department of Mechanical Engineering, University of Alberta, Edmonton, AB, Canada; Atanassov, Plamen B., Samueli School of Engineering, Irvine, CA, United States; Secanell, Marc M., Department of Mechanical Engineering, University of Alberta, Edmonton, AB, Canada; Barralet, Jake E., Faculty of Dentistry, Université McGill, Montreal, QC, Canada; Gostick, Jeff T., Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada","The performance of platinum group metal-free (PGM-free) catalyst layers suffers from mass transport limitations owing to the thickness required to achieve sufficiently high loading to match the performance of the Pt-based electrodes. A more detailed understanding of the PGM-free electrode structure is of a great importance to further improve their performance, but the nanoscale structure presents a challenge. In the present study, a non-PGM catalyst was synthesized by the sacrificial support method, and the electrospraying technique was used to fabricate catalyst layer electrodes. Electrodes with substantially different structural properties were obtained by varying the electrospraying parameters such as ink flow rate and the distance between the needle and the substrate. A wide range of structural properties of these non-PGM electrodes were experimentally measured, including thickness, porosity, pore size distribution, specific surface area, and the mass transport characteristics in the form of tortuosity. In general, the non-PGM catalyst layers fabricated by the electrospraying technique had much lower tortuosity than conventional catalyst layers due to a combination of highly porous structure and larger interagglomerate pores reducing the impact of the Knudsen effect. Geometric tortuosity was also obtained by adjusting the measured effective diffusivity values to remove the Knudsen effect, and it was found that electrosprayed and conventional layers follow a similar trend with porosity. © 2021 Elsevier Ltd",Electrospray; Knudsen diffusion; PEM fuel cell; Platinum group metal-free catalysts; Tortuosity,Electrodes; Fabrication; Platinum; Pore size; Structural properties; Conventional catalyst; Effective diffusivities; Electrode structure; Mass transport limitation; Nanoscale structure; Platinum group metals; Porous structures; Transport characteristics; Catalysts,Electrospray;Knudsen diffusion;PEM fuel cell;Platinum group metal-free catalysts;Tortuosity;Electrodes;Fabrication;Platinum;Pore size;Structural properties;Conventional catalyst;Effective diffusivities;Electrode structure;Mass transport limitation;Nanoscale structure;Platinum group metals;Porous structures;Transport characteristics;Catalysts,"J.T. Gostick; Department of Chemical Engineering, University of Waterloo, Waterloo, N2L 3G1, Canada; email: jgostick@uwaterloo.ca",,,,,,Elsevier Ltd,,,,,English,Mater. Today Energy,Article,Scopus,,2-s2.0-85100458651,,Canada;United States,uwaterloo.ca,,,"Kim, Y.; Asset, T.; Wei, F.; Atanassov, P.; Secanell, M.; Barralet, J.; Gostick, J.T."
"Choi, C.H., Park, S.H., Woo, S.I.",Facile growth of N-doped CNTs on Vulcan carbon and the effects of iron content on electrochemical activity for oxygen reduction reaction,2012,International Journal of Hydrogen Energy,37,5,,4563,4570,,36,10.1016/j.ijhydene.2011.08.086,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84856751630&doi=10.1016%2Fj.ijhydene.2011.08.086&partnerID=40&md5=2fbaeb91b52a6a8a210dcb4b7d45002b,"Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea","Choi, Chang Hyuck, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Park, Sung Hyeon, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Woo, Seongihl IIhl, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea","In order to develop cheap electrochemical oxygen reduction reaction (ORR) catalysts, N-doped CNTs grafted on Vulcan carbon were synthesized via pyrolysis of dicyandiamide on Fe <inf>2</inf>O <inf>3</inf>/C. Various contents of iron in Fe <inf>2</inf>O <inf>3</inf>/C (0, 20, 40 and 60 wt. %) were used as supports to investigate the effects and roles of iron content on ORR. It was shown that the iron acted as a promoter for doping nitrogen into carbon; as the iron content increased, the amount of nitrogen doping also increased. TEM and element analysis results indicated that iron induced growth of CNTs and facilitated N-doping in carbon. However, further increase in iron content higher than 20 wt. % showed negative effects on the ORR activity due to a decrease of the surface area of the prepared catalysts. Hence, the catalyst with the highest performance was observed when dicyandiamide was pyrolyzed with Fe <inf>2</inf>O <inf>3</inf>/C 20 wt. % (Fe-N-C-20) and the order of activity towards ORR was Fe-N-C-20 > Fe-N-C-40 > Fe-N-C-60 > Fe-N-C-0 > Vulcan XC-72R. Copyright © 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.",CNTs; Fe; Nitrogen doped carbon; Oxygen reduction reaction; PEMFC,CNTs; Dicyandiamide; Electrochemical activities; Electrochemical oxygen reduction; Element analysis; Iron content; N-doped; N-Doping; Nitrogen doped carbon; Nitrogen-doping; Oxygen reduction reaction; Surface area; Catalysts; Electrolytic reduction; Iron; Nitrogen; Proton exchange membrane fuel cells (PEMFC); Pyrolysis; Carbon,CNTs;Fe;Nitrogen doped carbon;Oxygen reduction reaction;PEMFC;Dicyandiamide;Electrochemical activities;Electrochemical oxygen reduction;Element analysis;Iron content;N-doped;N-Doping;Nitrogen-doping;Surface area;Catalysts;Electrolytic reduction;Iron;Nitrogen;Proton exchange membrane fuel cells (PEMFC);Pyrolysis;Carbon,"S.I. Woo; Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, South Korea; email: siwoo@kaist.ac.kr",,,,,,,03603199,0080311393,IJHED,,English,Int J Hydrogen Energy,Conference paper,Scopus,,2-s2.0-84856751630,,South Korea,kaist.ac.kr,,,"Choi, C.H.; Park, S.H.; Woo, S.I."
"Tong, L., Shao, Z.G., Qian, Y.S., Li, W.M.",Facile ionothermal synthesis of mesoporous Fe-Nx-C composites as efficient catalysts for oxygen reduction in acid media,2017,JOURNAL OF MATERIALS CHEMISTRY A,5,8,,3832,3838,7,41,10.1039/c6ta10190a,,"[Tong, Lei; Shao, ZongGui; Qian, YaSheng; Li, WenMu] Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Optoelect Mat Chem & Phys, Fuzhou 350002, Peoples R China; [Tong, Lei; Shao, ZongGui; Qian, YaSheng] Univ Chinese Acad Sci, Beijing 100049, Peoples R China",,"The development of high performance non-precious catalysts is still significant for the promising wide application of proton-exchange membrane (PEM) fuel cells. In this work, a facile ionothermal polymerization approach was developed to synthesize highly active covalent triazine framework (CTF) derived Fe-N-x-C catalysts for mediating the cathodic reaction of fuel cells. The impacts of the heating temperature, dosage of ZnCl2, and dinitrile aromatic monomers on the oxygen reduction reaction (ORR) activity of Fe-N-x-C catalysts were systematically discussed. High performance CTF-derived Fe-N-x-C catalysts were successfully obtained, among which the FB7 exhibits an extraordinary ORR performance in 0.1 M HClO4 aqueous solution. The linear sweep voltammetry (LSV) results show that there are only 14 mV and 25 mV slightly negative shifts of the onset potential (E-onset) and half-wave potential (E-1/2) of FB7 comparing with those of commercial Pt/C (20 mu g Pt per cm(2)). Besides, FB7 also shows better electrochemical stability and methanol-tolerance than Pt/C. This outstanding ORR performance of FB7 is attributed to its excellent percolation properties and high density of active sites.",,NITROGEN-DOPED CARBON; PEM FUEL-CELLS; HIERARCHICALLY POROUS CARBON; FE/N/C-CATALYSTS; ACTIVE-SITE; ELECTROCATALYSTS; IRON; POLYMER; ELECTROLYTE; FRAMEWORKS,NITROGEN-DOPED CARBON;PEM FUEL-CELLS;HIERARCHICALLY POROUS CARBON;FE/N/C-CATALYSTS;ACTIVE-SITE;ELECTROCATALYSTS;IRON;POLYMER;ELECTROLYTE;FRAMEWORKS,liwm@fjirsm.ac.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000395309800011,,China,fjirsm.ac.cn,Chinese Acad Sci;Univ Chinese Acad Sci,"Chinese Acad Sci, China;Univ Chinese Acad Sci, China","Tong, Lei; Shao, ZongGui; Qian, YaSheng; Li, WenMu"
"Wang, K.X., Chu, Y.Y., Zhang, X.X., Zhao, R.C., Tan, X.Y.",Facile Method to Synthesize a High-Activity S-Doped Fe/SNC Single-Atom Catalyst by Metal-Organic Frameworks for Oxygen Reduction Reaction in Acidic Medium,2021,ENERGY & FUELS,35,24,,20243,20249,7,14,10.1021/acs.energyfuels.1c03198,,"[Wang, Kuixiao; Chu, Yuanyuan; Zhang, Xiaoxiao; Zhao, Ruochen; Tan, Xiaoyao] Tiangong Univ, State Key Lab Separat Membranes & Membrane Proc, Tianjin 300387, Peoples R China; [Wang, Kuixiao; Chu, Yuanyuan; Zhang, Xiaoxiao; Zhao, Ruochen; Tan, Xiaoyao] Tiangong Univ, Sch Chem Engn & Technol, Tianjin 300387, Peoples R China",,"Fe/NC single-atom catalysts containing atomically dispersed FeN4 moieties have exhibited encouraging activity comparable to that of Pt in aqueous acids and outstanding performance in practical proton exchange membrane fuel cells (PEMFCs). However, it is still challenging to design dispersive exposed Fe single atoms against agglomeration and tune Fe-Nx coordination configuration to maximize the intrinsic activity of each active site. Introducing a heteroatom, such as S, could effectively improve the activity of the Fe/NC catalyst. In this work, we synthesized a novel catalyst (denoted as Fe/SNC) by pyrolyzing Fe(SCN)(3) and ZIF-8 precursors under media conditions. This in situ S-doped catalyst showed better activity (half-wave potential positively shifted by 25 mV) and stability (improved 18%) compared to the Fe/NC catalyst in 0.5M H2SO4 solution.",,CARBON; SITES; IRON; ELECTROCATALYSTS; GRAPHENE; SULFUR; IDENTIFICATION; PARTICLES,CARBON;SITES;IRON;ELECTROCATALYSTS;GRAPHENE;SULFUR;IDENTIFICATION;PARTICLES,chuyuanyuan@tiangong.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,0887-0624,,,,English,ENERG FUEL,Article,WoS,Energy & Fuels; Engineering,WOS:000760881300033,2-s2.0-85120376893,China,tiangong.edu.cn,Tiangong Univ,"Tiangong Univ, China","Wang, Kuixiao; Chu, Yuanyuan; Zhang, Xiaoxiao; Zhao, Ruochen; Tan, Xiaoyao"
"Zou, J., Chen, C., Chen, Y., Zhu, Y., Cheng, Q., Zou, L., Zou, Z., Yang, H.",Facile Steam-Etching Approach to Increase the Active Site Density of an Ordered Porous Fe-N-C Catalyst to Boost Oxygen Reduction Reaction,2022,ACS Catalysis,12,8,,4517,4525,,72,10.1021/acscatal.2c00408,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85128168956&doi=10.1021%2Facscatal.2c00408&partnerID=40&md5=6dbd3b84270e5d8cb3143705d47bd8a7,"Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; University of Chinese Academy of Sciences, Beijing, China","Zou, Jian, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China, University of Chinese Academy of Sciences, Beijing, China; Chen, Chi, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; Chen, Yubin, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China, University of Chinese Academy of Sciences, Beijing, China; Zhu, Yanping, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China, University of Chinese Academy of Sciences, Beijing, China; Cheng, Qingqing, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; Zou, Liangliang, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; Zou, Zhiqiang, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; Yang, Hui, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China","Developing facile and effective strategies to improve the active site density of transition-metal and nitrogen codoped carbon (M-N-C) catalysts for oxygen reduction reaction (ORR) remains a challenge. Herein, we propose ordered templates and a steam-etching synergetic approach to increase the active site density of Fe-N-C catalysts with interconnected ordered porous structures. The steam etching corrodes inactive amorphous carbon while active sites are well preserved. X-ray absorption fine structure and fitting result reveal the uniform distribution of atomically dispersed Fe-N<inf>4</inf>active sites. The steam etching dramatically increases the active site density by 4.6 times, which is verified by the NO adsorption-reduction experiments. As a result, the ORR mass activity of the ordered macroporous Fe-N-C catalyst treated by steam etching at 800 °C (OM-Fe-N-C-steam-800) is 1.8 times higher than that of Ar-protected one. The proton-exchange membrane fuel cell employing the OM-Fe-N-C-steam-800 catalyst delivered an enhanced peak power density of 0.78 W cm-2compared to that of Ar-protected counterpart (0.63 W cm-2). © 2022 American Chemical Society. All rights reserved.",active site density; Fe-N-C catalyst; ordered porous structure; oxygen reduction reaction; steam etching,Amorphous carbon; Catalyst activity; Electrolytic reduction; Iron compounds; Oxygen; Porosity; Proton exchange membrane fuel cells (PEMFC); Steam; Transition metals; X ray absorption; Active site; Active site density; Fe-N-C catalyst; Nitrogen codoped; Ordered porous; Ordered porous structure; Oxygen reduction reaction; Porous structures; Steam etching; ]+ catalyst; Etching,active site density;Fe-N-C catalyst;ordered porous structure;oxygen reduction reaction;steam etching;Amorphous carbon;Catalyst activity;Electrolytic reduction;Iron compounds;Oxygen;Porosity;Proton exchange membrane fuel cells (PEMFC);Steam;Transition metals;X ray absorption;Active site;Nitrogen codoped;Ordered porous;Porous structures;]+ catalyst;Etching,,,,,,,American Chemical Society,21555435,,ACCAC,,English,ACS Catal.,Article,Scopus,,2-s2.0-85128168956,,China,No email,,,"Zou, J.; Chen, C.; Chen, Y.; Zhu, Y.; Cheng, Q.; Zou, L.; Zou, Z.; Yang, H."
"Lee, J.H., Park, M.J., Jung, J., Ryu, J., Cho, E., Nam, S.W., Kim, J.Y., Yoon, C.W.",Facile synthesis of hollow Fe-N-C hybrid nanostructures for oxygen reduction reactions,2014,INORGANICA CHIMICA ACTA,422,,,3,7,5,9,10.1016/j.ica.2014.08.039,,"[Lee, Jin Hee; Park, Min Jung; Jung, Juhae; Ryu, Jaeyune; Cho, EunAe; Nam, Suk-Woo; Kim, Jin Young; Yoon, Chang Won] Korea Inst Sci & Technol, Fuel Cell Res Ctr, Seoul 136791, South Korea; [Park, Min Jung] Korea Univ Sci & Technol, Dept Energy & Environm Engn, Taejon, South Korea; [Yoon, Chang Won] Korea Univ Sci & Technol, Dept Clean Energy & Chem Engn, Taejon, South Korea",,"A novel Fe-N-C composite material with a hollow graphitized nanostructure is prepared by pyrolyzing iron-chelating, nitrogen-containing precursors adsorbed on carbon black spheres for use in the oxygen reduction reaction (ORR) of polymer electrolyte membrane fuel cells (PEMFCs). The resulting composite hybrid exhibits excellent electrocatalytic activity and a four-electron dominated ORR pathway in an alkaline solution. The efficient catalytic activity of the prepared Fe-N-C is mainly attributed to the effective incorporation of nitrogen and iron atoms into the graphitized matrices and high electrical conductivity due to the interconnected structure. Furthermore, the hybrid material shows superior catalytic durability in the alkaline medium even after 3000 cyclic voltammetry cycles, making it a good candidate for a cathodic electrocatalyst in PEMFCs. (C) 2014 Elsevier B. V. All rights reserved.",Hollow graphitic structure; Fe-N-C nanocomposite; Oxygen reduction reaction,NITROGEN-DOPED GRAPHENE; MEMBRANE FUEL-CELLS; METAL CATALYSTS; CARBON; ELECTROCATALYSTS; PHTHALOCYANINE; NANOPARTICLES; COMPOSITE; NANOCOMPOSITES; ELECTROLYTE,Hollow graphitic structure;Fe-N-C nanocomposite;Oxygen reduction reaction;NITROGEN-DOPED GRAPHENE;MEMBRANE FUEL-CELLS;METAL CATALYSTS;CARBON;ELECTROCATALYSTS;PHTHALOCYANINE;NANOPARTICLES;COMPOSITE;NANOCOMPOSITES;ELECTROLYTE,jinykim@kist.re.kr; cwyoon@kist.re.kr,,"PO BOX 564, 1001 LAUSANNE, SWITZERLAND",,,,ELSEVIER SCIENCE SA,0020-1693,,,,English,INORG CHIM ACTA,Article,WoS,Chemistry,WOS:000343585800002,2-s2.0-84908005628,South Korea,kist.re.kr,Korea Inst Sci & Technol;Korea Univ Sci & Technol,"Korea Inst Sci & Technol, South Korea;Korea Univ Sci & Technol, South Korea","Lee, Jin Hee; Park, Min Jung; Jung, Juhae; Ryu, Jaeyune; Cho, EunAe; Nam, Suk-Woo; Kim, Jin Young; Yoon, Chang Won"
"Tao, X., Lu, R., Ni, L., Gridin, V., Al-Hilfi, S.H., Qiu, Z., Zhao, Y., Kramm, U.I., Zhou, Y., Mullen, K.",Facilitating the acidic oxygen reduction of Fe-N-C catalysts by fluorine-doping,2022,Materials Horizons,9,1,,417,424,,62,10.1039/d1mh01307f,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85122856745&doi=10.1039%2Fd1mh01307f&partnerID=40&md5=4fa3d62d403b736855c4aad5418ee4a4,"Jiangsu University, Zhenjiang, Jiangsu, China; Max Planck Institute for Polymer Research, Mainz, Rheinland-Pfalz, Germany; School of Materials Science and Engineering, State Key Laboratory of Silicate Materials for Architectures, Wuhan, Hubei, China; Department of Materials and Earth Sciences, Technische Universität Darmstadt, Darmstadt, Hessen, Germany","Tao, Xiafang, Jiangsu University, Zhenjiang, Jiangsu, China, Max Planck Institute for Polymer Research, Mainz, Rheinland-Pfalz, Germany; Lu, Ruihu, School of Materials Science and Engineering, State Key Laboratory of Silicate Materials for Architectures, Wuhan, Hubei, China; Ni, Lingmei, Department of Materials and Earth Sciences, Technische Universität Darmstadt, Darmstadt, Hessen, Germany; Gridin, Vladislav, Department of Materials and Earth Sciences, Technische Universität Darmstadt, Darmstadt, Hessen, Germany; Al-Hilfi, Samir H., Max Planck Institute for Polymer Research, Mainz, Rheinland-Pfalz, Germany; Qiu, Zijie, Max Planck Institute for Polymer Research, Mainz, Rheinland-Pfalz, Germany; Zhao, Y., School of Materials Science and Engineering, State Key Laboratory of Silicate Materials for Architectures, Wuhan, Hubei, China; Kramm, Ulrike Ingrid, Department of Materials and Earth Sciences, Technische Universität Darmstadt, Darmstadt, Hessen, Germany; Zhou, Yazhou, Jiangsu University, Zhenjiang, Jiangsu, China, Max Planck Institute for Polymer Research, Mainz, Rheinland-Pfalz, Germany; Müllen, Klaus, Max Planck Institute for Polymer Research, Mainz, Rheinland-Pfalz, Germany","As the alternatives to expensive Pt-based materials for the oxygen reduction reaction (ORR), iron/nitrogen co-doped carbon catalysts (FeNC) with dense FeNx active sites are promising candidates to promote the commercialization of proton exchange membrane fuel cells. Herein, we report a synthetic approach using perfluorotetradecanoic acid (PFTA)-modified metal-organic frameworks as precursors for the synthesis of fluorine-doped FeNC (F-FeNC) with improved ORR performance. The utilization of PFTA surfactants causes profound changes of the catalyst structure including F-doping into graphitic carbon, increased micropore surface area and Brunauer-Emmett-Teller (BET) surface area (up to 1085 m2 g-1), as well as dense FeNx sites. The F-FeNC catalyst exhibits an improved ORR activity with a high E1/2 of 0.83 V (vs. RHE) compared to the pristine FeNC material (E1/2 = 0.80 V). A fast decay occurs in the first 10 000 potential cycles for the F-FeNC catalyst, but high durability is still maintained up to another 50 000 cycles. Density functional theory calculations reveal that the strongly withdrawing fluorine atoms doped on the graphitic carbon can optimize the electronic structure of the FeNx active center and decrease the adsorption energy of ORR intermediates. © 2021 The Royal Society of Chemistry.",,Carbon; Catalyst activity; Density functional theory; Electrolytic reduction; Electronic structure; Fluorine; Organometallics; Oxygen; Proton exchange membrane fuel cells (PEMFC); Co-doped; Doped carbons; Fluorine doping; Fluorine-doped; Graphitic carbons; Iron nitrogen; Oxygen Reduction; Oxygen reduction reaction; Perfluorotetradecanoic acid; ]+ catalyst; Iron compounds,Carbon;Catalyst activity;Density functional theory;Electrolytic reduction;Electronic structure;Fluorine;Organometallics;Oxygen;Proton exchange membrane fuel cells (PEMFC);Co-doped;Doped carbons;Fluorine doping;Fluorine-doped;Graphitic carbons;Iron nitrogen;Oxygen Reduction;Oxygen reduction reaction;Perfluorotetradecanoic acid;]+ catalyst;Iron compounds,"Y. Zhou; School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China; email: yazhou@ujs.edu.cn; Y. Zhou; School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China; email: yazhou@ujs.edu.cn; K. Müllen; Max Planck Institute for Polymer Research, Mainz, 55128, Germany; email: muellen@mpip-mainz.mpg.de; U.I. Kramm; Department of Materials and Earth Science, Department of Chemistry, Technical University Darmstadt, Darmstadt, Otto-Berndt-Straße 3, 64287, Germany; email: kramm@ese.tu-darmstadt.de",,,,,,Royal Society of Chemistry,20516347,,,34762085,English,Mater. horizons,Article,Scopus,,2-s2.0-85122856745,,China;Germany,ujs.edu.cn,,,"Tao, X.; Lu, R.; Ni, L.; Gridin, V.; Al-Hilfi, S.H.; Qiu, Z.; Zhao, Y.; Kramm, U.I.; Zhou, Y.; Mullen, K."
"Liu, X., Liu, H., Chen, C., Zou, L., Li, Y., Zhang, Q., Yang, B., Zou, Z., Yang, H.",Fe2N nanoparticles boosting FeNx moieties for highly efficient oxygen reduction reaction in Fe-N-C porous catalyst,2019,Nano Research,12,7,,1651,1657,,109,10.1007/s12274-019-2415-7,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85065043880&doi=10.1007%2Fs12274-019-2415-7&partnerID=40&md5=c3fb68ed66ab5f3b4382a684eb8c2843,"Center for Energy Storage and Conversion, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; University of Chinese Academy of Sciences, Beijing, China; School of Physical Science and Technology, ShanghaiTech University, Shanghai, China; Evergrande Neoenergy Technology Group, Shanghai, China","Liu, Xiao, Center for Energy Storage and Conversion, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China, University of Chinese Academy of Sciences, Beijing, China; Liu, Hong, University of Chinese Academy of Sciences, Beijing, China, School of Physical Science and Technology, ShanghaiTech University, Shanghai, China; Chen, Chi, Center for Energy Storage and Conversion, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; Zou, Liangliang, Center for Energy Storage and Conversion, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; Li, Yuan, Evergrande Neoenergy Technology Group, Shanghai, China; Zhang, Qing, Evergrande Neoenergy Technology Group, Shanghai, China; Yang, Bo, School of Physical Science and Technology, ShanghaiTech University, Shanghai, China; Zou, Zhiqiang, Center for Energy Storage and Conversion, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; Yang, Hui, Center for Energy Storage and Conversion, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China","Replacing Pt-based electrocatalysts for the oxygen reduction reaction (ORR) with high performance and low-cost non-precious metal catalysts is crucial for the commercialization of fuel cells. Herein, we present a highly efficient Fe-N-C porous ORR electrocatalyst with FeN<inf>x</inf>moieties promoted by Fe<inf>2</inf>N nanoparticles derived from Fe-doped zeolitic imidazolate framework. The best-performing Fe-N-C/HPC-NH<inf>3</inf>catalyst exhibits a superior ORR activity with an onset (E<inf>0</inf>) and half-wave (E<inf>1/2</inf>) potential of 0.945 and 0.803 V (RHE), respectively, which is comparable to those of the commercial Pt/C in acidic media. Probing and acid-leaching experiments prove that FeN<inf>x</inf> moieties play an important role in the ORR and the Fe<inf>2</inf>N can further improve the ORR activity. Density functional theory calculation reveals a synergistic effect that the existence of Fe<inf>2</inf>N weakens the adsorption of ORR intermediates on active sites and lowers the reaction free energy of the potential limiting step, thus facilitating the ORR. Both experimental evidence and theoretical analysis for the enhancement of ORR activity by Fe<inf>2</inf>N decoration in Fe-N-C catalyst might inspire a new strategy for rational design of high performance non-precious metal catalysts. [Figure not available: see fulltext.]. © 2019, Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature.",Fe2N nanoparticle; FeNx moiety; non-precious metal; oxygen reduction reaction; proton exchange membrane fuel cell,Costs; Density functional theory; Electrocatalysts; Electrolytic reduction; Free energy; Metal nanoparticles; Oxygen; Precious metals; Proton exchange membrane fuel cells (PEMFC); Reaction intermediates; Experimental evidence; FeNx moiety; Non-precious metal catalysts; Non-precious metals; ORR electrocatalysts; Oxygen reduction reaction; Pt-based electrocatalyst; Zeolitic imidazolate frameworks; Iron compounds,Fe2N nanoparticle;FeNx moiety;non-precious metal;oxygen reduction reaction;proton exchange membrane fuel cell;Costs;Density functional theory;Electrocatalysts;Electrolytic reduction;Free energy;Metal nanoparticles;Oxygen;Precious metals;Proton exchange membrane fuel cells (PEMFC);Reaction intermediates;Experimental evidence;Non-precious metal catalysts;Non-precious metals;ORR electrocatalysts;Pt-based electrocatalyst;Zeolitic imidazolate frameworks;Iron compounds,"H. Yang; Center for Energy Storage and Conversion, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, China; email: yangh@sari.ac.cn",,,,,,Tsinghua University Press wyl-dhh@tsinghua.edu.cn,19980124,,,,English,Nano. Res.,Article,Scopus,,2-s2.0-85065043880,,China,sari.ac.cn,,,"Liu, X.; Liu, H.; Chen, C.; Zou, L.; Li, Y.; Zhang, Q.; Yang, B.; Zou, Z.; Yang, H."
"Kim, M., Lim, J., Bak, J., Song, D., Oh, S., Cho, E.",Fe and N Codoped Mesoporous Carbon Nanofiber as a Nonprecious Metal Catalyst for Oxygen Reduction Reaction and a Durable Support for Pt Nanoparticles,2019,ACS Sustainable Chemistry and Engineering,7,20,,17544,17552,,15,10.1021/acssuschemeng.9b05118,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85073005099&doi=10.1021%2Facssuschemeng.9b05118&partnerID=40&md5=bb0fdcf91298a5df4d5b0d41efba5893,"Korea Advanced Institute of Science and Technology, Daejeon, South Korea","Kim, Minjoong, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Lim, Jeonghoon, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Bak, Junu, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Song, Donghoon, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Oh, Sekwon, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Cho, Eun Ae, Korea Advanced Institute of Science and Technology, Daejeon, South Korea","Cost reduction and long-term durability are crucial issues for the commercialization of polymer electrolyte membrane fuel cells. To accomplish these goals, herein, we report an electrospun iron and nitrogen codoped mesoporous carbon nanofiber (Fe-N-MCNF) for use as both a low-cost nonprecious metal catalyst and a durable support of platinum nanoparticles. Silica nanoparticles and polyvinyl acetate are used together as porogens to create mesopores. As a synergetic effect of these two types of porogens, numerous mesopores are successfully formed inside of the carbon nanofibers. The highly mesoporous structure increases the specific surface area and improves the diffusion kinetics of the reactants, leading to an increase in the effective surface area of the Fe-N-MCNFs for electrochemical reactions. Therefore, the Fe-N-MCNFs can have high oxygen reduction reaction activity alone in an acidic solution and the ability to provide a large surface area for platinum nanoparticles as a support. The platinum nanoparticles on the Fe-N-MCNFs are highly stable under an oxidative potential condition of fuel cells due to the high corrosion resistance of the graphitized carbon structure. This work demonstrates that Fe-N-MCNF can be utilized as both a low-cost catalyst and a durable support in practical fuel cell applications. © © 2019 American Chemical Society.",Catalyst support; Electrospinning; Mesoporous carbon nanofiber; Nonprecious metal catalyst; Oxygen reduction reaction; Porogens,Carbon nanofibers; Corrosion resistance; Cost reduction; Electrolytic reduction; Electrospinning; Iron; Mesoporous materials; Metal nanoparticles; Nanocatalysts; Oxygen; Platinum; Polyelectrolytes; Polyvinyl acetates; Proton exchange membrane fuel cells (PEMFC); Silica; Silica nanoparticles; Effective surface area; Electrochemical reactions; Mesoporous carbon nanofibers; Mesoporous structures; Non-precious metal catalysts; Oxygen reduction reaction; Platinum nano-particles; Porogens; Catalyst supports,Catalyst support;Electrospinning;Mesoporous carbon nanofiber;Nonprecious metal catalyst;Oxygen reduction reaction;Porogens;Carbon nanofibers;Corrosion resistance;Cost reduction;Electrolytic reduction;Iron;Mesoporous materials;Metal nanoparticles;Nanocatalysts;Oxygen;Platinum;Polyelectrolytes;Polyvinyl acetates;Proton exchange membrane fuel cells (PEMFC);Silica;Silica nanoparticles;Effective surface area;Electrochemical reactions;Mesoporous carbon nanofibers;Mesoporous structures;Non-precious metal catalysts;Platinum nano-particles;Catalyst supports,"E. Cho; Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Yuseong-gu, Daejeon, 291 Daehak-ro, 34141, South Korea; email: eacho@kaist.ac.kr",,,,,,American Chemical Society service@acs.org,,,,,English,ACS Sustainable Chem. Eng.,Article,Scopus,,2-s2.0-85073005099,,South Korea,kaist.ac.kr,,,"Kim, M.; Lim, J.; Bak, J.; Song, D.; Oh, S.; Cho, E."
"Tian, J., Birry, L., Jaouen, F., Dodelet, J.P.",Fe-based catalysts for oxygen reduction in proton exchange membrane fuel cells with cyanamide as nitrogen precursor and/or pore-filler,2011,ELECTROCHIMICA ACTA,56,9,,3276,3285,10,38,10.1016/j.electacta.2011.01.029,,"[Tian, J.; Birry, L.; Jaouen, F.; Dodelet, J. P.] INRS Energie, Mat & Telecommun, Varennes, PQ J3X 1S2, Canada",,"Fe/N/C catalysts for oxygen reduction reaction were synthesized via impregnation or ballmilling. The role of cyanamide (CM) as nitrogen precursor and/or pore-filler for a highly microporous carbon (Black Pearls 2000) was investigated. The use of CM in this work resulted in two main differences compared with phenanthroline from our previous work: (i) ballmilling the precursors did not result in improved activity of the resulting catalysts, and (ii) the activity after the first pyrolysis in argon was relatively high, but did not increase after a second pyrolysis in NH3. These differences may be explained by TGA measurements of both pore-fillers, where complete gasification of CM is observed at temperatures above 750 degrees C in Ar, while pyrolysis of phenanthroline in Ar results in 20 wt% residual carbon-based material. Consequently, when using CM as pore-filler with a highly microporous carbon support, the maximum microporous surface area and nitrogen content is reached after only a single pyrolysis in Ar. The most active catalyst prepared with CM was obtained by pyrolysing in Ar at 950 degrees C a catalyst precursor containing 1 wt% Fe, 80 wt% CM and Black Pearls 2000. This catalyst possessed about 1/6th the catalytic activity of best reported using phenanthroline as a pore-filler. Changing the carbon support had effects on the activity and stability of the catalysts. The catalysts made with a non-porous furnace black (N330) or carbon nanotubes as a carbon support were more stable but less performing than those using carbon supports having high microporous surface area like Black Pearls 2000 or Ketjenblack. The desirable properties for a pore-filler molecule used in the synthesis of Fe/N/C-catalysts by the pore-filling method are discussed. (C) 2011 Elsevier Ltd. All rights reserved.",Polymer electrolyte membrane fuel cells; Oxygen reduction reaction; Non-noble metal catalysts; Planetary ballmilling,CATHODE CATALYST; CARBON-BLACK; PYROLYZED PORPHYRINS; ACTIVE-SITES; CO-PPY/C; ELECTROCATALYSTS; IRON; ELECTROREDUCTION; COTMPP; ORR,Polymer electrolyte membrane fuel cells;Oxygen reduction reaction;Non-noble metal catalysts;Planetary ballmilling;CATHODE CATALYST;CARBON-BLACK;PYROLYZED PORPHYRINS;ACTIVE-SITES;CO-PPY/C;ELECTROCATALYSTS;IRON;ELECTROREDUCTION;COTMPP;ORR,Jaouen@emt.inrs.ca; Dodelet@emt.inrs.ca,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000290084700024,2-s2.0-79953209994,Canada,emt.inrs.ca,INRS Energie,"INRS Energie, Canada","Tian, J.; Birry, L.; Jaouen, F.; Dodelet, J. P."
"Garcia, A., Retuerto, M., Dominguez, C., Pascual, L., Ferrer, P., Gianolio, D., Serrano, A., Assmann, P., Garcia-Sanchez, D.G., Pena, M.A., Rojas, S.",Fe doped porous triazine as efficient electrocatalysts for the oxygen reduction reaction in acid electrolyte,2020,Applied Catalysis B: Environmental,264,,118507,,,,32,10.1016/j.apcatb.2019.118507,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85076359164&doi=10.1016%2Fj.apcatb.2019.118507&partnerID=40&md5=1cbd333ddb69f066b1e760e071d56844,"CSIC - Instituto de Catálisis y Petroleoquímica (ICP), Madrid, Madrid, Spain; CSIC - Instituto de Catálisis y Petroleoquímica (ICP), Madrid, Madrid, Spain; Diamond Light Source, Didcot, Oxfordshire, United Kingdom; European Synchrotron Radiation Facility, Grenoble, Auvergne-Rhone-Alpes, France; Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany","García, Álvaro, CSIC - Instituto de Catálisis y Petroleoquímica (ICP), Madrid, Madrid, Spain; Retuerto, María, CSIC - Instituto de Catálisis y Petroleoquímica (ICP), Madrid, Madrid, Spain; Domínguez, Carlota, CSIC - Instituto de Catálisis y Petroleoquímica (ICP), Madrid, Madrid, Spain; Pascual, Laura, CSIC - Instituto de Catálisis y Petroleoquímica (ICP), Madrid, Madrid, Spain; Ferrer, Pilar, Diamond Light Source, Didcot, Oxfordshire, United Kingdom; Gianolio, D., Diamond Light Source, Didcot, Oxfordshire, United Kingdom; Serrano, A., European Synchrotron Radiation Facility, Grenoble, Auvergne-Rhone-Alpes, France; Aßmann, Pia, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany; Garcia-Sanchez, Daniel, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany; Peña, Miguel A., Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany; Rojas, S., Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany","In this work, we report the synthesis of Fe/N/C electrocatalysts using triazine based porous organic polymers as precursors. Iron-doped triazine porous organic polymers were obtained by in situ polymerization of iron precursor and 1,2- or 1,4- dicyanobenzene (DCB). In order to obtain the actual catalyst, the polymer obtained was subjected to thermal treatment under NH<inf>3</inf>. The catalysts obtained exhibit activity and durability for the oxygen reduction reaction in acid electrolyte. Thorough characterization of the catalysts reveal the formation of several types of iron species, including metallic iron, iron carbides and Fe-Nx moieties. The latter species is the main responsible for the high activity measured for the oxygen reduction reaction in acid electrolyte. 1,2-DCB results in more active catalysts than 1,4-DCB due to the higher fraction of FeNx ensembles in the former, probably because vicinal positions of N-bearing groups are more prone to coordinate Fe atoms. © 2019 The Author(s)",Fe-N; NPMC; ORR; PEMFC; Triazine,Ammonia; Carbides; Catalyst activity; Electrocatalysts; Electrolytes; Electrolytic reduction; Organic polymers; Oxygen; Oxygen reduction reaction; Proton exchange membrane fuel cells (PEMFC); Acid electrolytes; Active catalyst; In-situ polymerization; Iron carbides; Iron precursors; NPMC; Porous organic polymers; Triazine; Iron compounds,Fe-N;NPMC;ORR;PEMFC;Triazine;Ammonia;Carbides;Catalyst activity;Electrocatalysts;Electrolytes;Electrolytic reduction;Organic polymers;Oxygen;Oxygen reduction reaction;Proton exchange membrane fuel cells (PEMFC);Acid electrolytes;Active catalyst;In-situ polymerization;Iron carbides;Iron precursors;Porous organic polymers;Iron compounds,"M. Retuerto; Grupo de Energía y Química Sostenibles, Instituto de Catálisis y Petroleoquímca, CSIC, Madrid, Marie Curie 2, 28049, Spain; email: m.retuerto@csic.es",,,,,,Elsevier B.V.,09263373,,ACBEE,,English,Appl. Catal. B Environ.,Article,Scopus,,2-s2.0-85076359164,,Spain;United Kingdom;France;Germany,csic.es,,,"Garcia, A.; Retuerto, M.; Dominguez, C.; Pascual, L.; Ferrer, P.; Gianolio, D.; Serrano, A.; Assmann, P.; Garcia-Sanchez, D.G.; Pena, M.A.; Rojas, S."
"Zhang, L., Lee, K., Bezerra, C.W.B., Zhang, J., Zhang, J.",Fe loading of a carbon-supported Fe-N electrocatalyst and its effect on the oxygen reduction reaction,2009,Electrochimica Acta,54,26,,6631,6636,,66,10.1016/j.electacta.2009.06.049,https://www.scopus.com/inward/record.uri?eid=2-s2.0-69249156149&doi=10.1016%2Fj.electacta.2009.06.049&partnerID=40&md5=18d1f5609daf6a21c9bd6ed1e1f94acb,"Institute for Fuel Cell Innovation, National Research Council Canada, Ottawa, ON, Canada; Departamento de Química, Universidade Federal do Maranhão, Sao Luis, MA, Brazil","Zhang, Lei, Institute for Fuel Cell Innovation, National Research Council Canada, Ottawa, ON, Canada; Lee, Kunchan, Institute for Fuel Cell Innovation, National Research Council Canada, Ottawa, ON, Canada; Bezerra, C. W.B., Departamento de Química, Universidade Federal do Maranhão, Sao Luis, MA, Brazil; Zhang, Jianlu, Institute for Fuel Cell Innovation, National Research Council Canada, Ottawa, ON, Canada; Zhang, Jiujun, Institute for Fuel Cell Innovation, National Research Council Canada, Ottawa, ON, Canada","Carbon-supported non-noble metal catalysts with Fe as the metal and tripyridyl triazine (TPTZ) as the ligand (Fe-TPTZ/C) were synthesized using a simple chemical method. How the Fe loading in this Fe-TPTZ/C catalyst affected the ORR activity was investigated using several Fe loadings: 0.2, 0.4, 0.7, 2.7, 4.7, 5.8 and 7.8 wt%. The as-prepared catalysts were then heat-treated at 800 °C in an N<inf>2</inf> environment to obtain catalysts of Fe-N/C. Energy dispersive X-ray spectroscopy (EDX) was used to identify the Fe-N/C catalysts. These Fe-N/C catalysts showed significant ORR activity improvement over the as-prepared Fe-TPTZ/C catalysts. The kinetics of the ORR catalyzed by the catalysts with different Fe loadings was studied using the rotating disk electrode technique. It was observed that a 4.7 wt% Fe loading yielded the best catalytic ORR activity. Regarding the overall ORR electron transfer number, it was found that as the catalyst's Fe loading increased, the overall ORR electron transfer number changed from 2.9 to 3.9, suggesting that increasing the Fe loading could alter the ORR mechanism from a 2-electron to a 4-electron transfer dominated process. The Tafel method was also used to obtain one important kinetic parameter: the exchange current density. A fuel cell was assembled using a membrane electrode assembly with 4.7 wt% Fe loaded Fe-N/C as the cathode catalyst, and the cell was tested for both performance and durability, yielding a 1000-h lifetime. Crown Copyright © 2009.","2,4,6-Tris(2-pyridyl)-1,3,5-triazine (TPTZ); Electrocatalyst; Iron (Fe)-nitrogen (N); Oxygen reduction reaction (ORR); Proton exchange membrane (PEM) fuel cell","2,4,6-Tris(2-pyridyl)-1,3,5-triazine (TPTZ); A-carbon; Cathode catalyst; Chemical method; Electron transfer; Energy dispersive X ray spectroscopy; Exchange current densities; Iron (Fe)-nitrogen (N); Membrane electrode assemblies; Non-noble metal catalysts; Oxygen reduction reaction; Oxygen reduction reaction (ORR); Proton exchange membrane (PEM) fuel cell; Rotating disk electrodes; Catalysis; Catalyst activity; Cell membranes; Electrocatalysts; Electrolytic reduction; Electron transitions; Fuel cells; Oxygen; Precious metals; Protons; Rotating disks; Loading","2,4,6-Tris(2-pyridyl)-1,3,5-triazine (TPTZ);Electrocatalyst;Iron (Fe)-nitrogen (N);Oxygen reduction reaction (ORR);Proton exchange membrane (PEM) fuel cell;A-carbon;Cathode catalyst;Chemical method;Electron transfer;Energy dispersive X ray spectroscopy;Exchange current densities;Membrane electrode assemblies;Non-noble metal catalysts;Oxygen reduction reaction;Rotating disk electrodes;Catalysis;Catalyst activity;Cell membranes;Electrocatalysts;Electrolytic reduction;Electron transitions;Fuel cells;Oxygen;Precious metals;Protons;Rotating disks;Loading","J. Zhang; Institute for Fuel Cell Innovation, National Research Council of Canada, Vancouver, BC V6T 1W5, Canada; email: jiujun.zhang@nrc.gc.ca",,,,,,,00134686,,ELCAA,,English,Electrochim Acta,Article,Scopus,,2-s2.0-69249156149,,Canada;Brazil,nrc.gc.ca,,,"Zhang, L.; Lee, K.; Bezerra, C.W.B.; Zhang, J.; Zhang, J."
"Li, K., Zhao, J., Yuan, R., Chen, J., Li, H., Wang, X.",Fe-loading single-atom catalyst with hierarchical porous structure for accelerated ORR activity,2025,Ionics,31,2,,2021,2029,,3,10.1007/s11581-024-05990-8,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85212469437&doi=10.1007%2Fs11581-024-05990-8&partnerID=40&md5=1c8a9da6feae41ee9e7b3a9aef5cb87c,"Gac aion new energy automobile Co. Ltd., Guangzhou, China; College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, China","Li, Kaixiang, Gac aion new energy automobile Co. Ltd., Guangzhou, China; Zhao, Jinyu, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, China; Yuan, Ruipeng, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, China; Chen, Jiajun, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, China; Li, Huijun, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, China; Wang, Xiaomin, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, China","Fe–N-C is considered to be the most promising candidate for catalyzing oxygen reduction reaction (ORR), and its large-scale development is crucial to reducing the cost of proton exchange membrane fuel cells (PEMFCs). However, its simple and efficient synthesis still faces great challenges, and the microstructure changes in the pyrolysis process are not clear. Herein, we report a high-performance Fe–N-C catalyst, which is produced from the high-temperature pyrolysis of Fe-doped ZIF-8 precursor. The effect of pyrolysis temperature on the specific surface area, porous structure, and graphitization level of Fe–N-C catalyst is systematically studied. Eminently, Fe–N-C 1000, which was obtained via pyrolysis of Fe-ZIF-8 at 1000 °C, possesses highly dispersed Fe-N<inf>4</inf> active sites on the high surface area polyhedral, ensuring the high intrinsic activity. The simultaneous hierarchically ordered porous architecture provides a wealth of mass transfer channels to improve dynamic performance. It exhibits an outstanding ORR activity in acidic solution (E<inf>1/2</inf> of 0.791 V). High graphitization also enhances its corrosion resistance, showing superior stability (only change 20 mV after 5000 cycles in 0.5 M H<inf>2</inf>SO<inf>4</inf>). This work well demonstrates the importance of establishing the structural equilibrium of the catalyst under pyrolysis conditions for efficient ORR. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.",Fe–N-C electrocatalyst; Hierarchical porous structure; Metal–organic framework; Oxygen reduction reaction,Bioremediation; Electrolytic reduction; Graphitization; High temperature corrosion; Oxygen reduction reaction; Pyrolysis; Fe–N-C electrocatalyst; Hierarchical porous structures; Large-scale development; Metalorganic frameworks (MOFs); Proton-exchange membranes fuel cells; Reaction activity; Simple++; Single-atoms; ]+ catalyst; Corrosion resistance,Fe–N-C electrocatalyst;Hierarchical porous structure;Metal–organic framework;Oxygen reduction reaction;Bioremediation;Electrolytic reduction;Graphitization;High temperature corrosion;Pyrolysis;Hierarchical porous structures;Large-scale development;Metalorganic frameworks (MOFs);Proton-exchange membranes fuel cells;Reaction activity;Simple++;Single-atoms;]+ catalyst;Corrosion resistance,"X. Wang; College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China; email: wangxiaomin@tyut.edu.cn",,,,,,Springer Science and Business Media Deutschland GmbH,09477047,,,,English,Ionics,Article,Scopus,,2-s2.0-85212469437,,China,tyut.edu.cn,,,"Li, K.; Zhao, J.; Yuan, R.; Chen, J.; Li, H.; Wang, X."
"Yin, S.H., Yan, Y.N., Chen, L., Cheng, N.Y., Cheng, X.Y., Huang, R., Huang, H., Zhang, B.W., Jiang, Y.X., Sun, S.G.",FeN4 Active Sites Electronically Coupled with PtFe Alloys for Ultralow Pt Loading Hybrid Electrocatalysts in Proton Exchange Membrane Fuel Cells,2023,ACS NANO,18,1,,551,559,9,49,10.1021/acsnano.3c08570,,"[Yin, Shuhu; Yan, Ya-Ni; Chen, Long; Cheng, Xiaoyang; Huang, Rui; Jiang, Yan-Xia; Sun, Shi-Gang] Xiamen Univ, Coll Chem & Chem Engn & Discipline Intelligent Ins, Engn Res Ctr Electrochem Technol, State Key Lab Phys Chem Solid Surfaces,Minist Educ, Xiamen 361005, Peoples R China; [Cheng, Ningyan] Anhui Univ, Inst Phys Sci & Informat Technol, Mat & Intelligent Sensing Lab Anhui Prov, Key Lab Struct & Funct Regulat Hybrid Mat,Minist E, Hefei 230000, Peoples R China; [Huang, Huan] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China; [Zhang, Binwei] Chongqing Univ, Sch Chem & Chem Engn, Chongqing 400044, Peoples R China; [Zhang, Binwei] Inst Adv Interdisciplinary Studies, Ctr Adv Electrochem Energy, Chongqing 400044, Peoples R China",,"The exorbitant cost of Pt-based electrocatalysts and the poor durability of non-noble metal electrocatalysts for proton exchange membrane fuel cells limited their practical application. Here, FeN4 active sites electronically coupled with PtFe alloys (PtFe-FeNC) were successfully prepared by a vapor deposition strategy as an ultralow Pt loading (0.64 wt %) hybrid electrocatalyst. The FeN4 sites on the FeNC matrix are able to effectively anchor the PtFe alloys, thus inhibiting their aggregation during long-life cycling. These PtFe alloys, in turn, can efficiently restrain the leaching of the FeN4 sites from the FeNC matrix. Thus, the PtFe-FeNC demonstrated an improved Pt mass activity of 2.33 A mg(Pt)(-1) at 0.9 V toward oxygen reduction reaction, which is 12.9 times higher than that of commercial Pt/C (0.18 A mg(Pt)(-1)). It demonstrated great stability, with the Pt mass activity decreasing by only 9.4% after 70,000 cycles. Importantly, the fuel cell with an ultralow Pt loading in the cathode (0.012 mg(Pt) cm(-2)) displays a high Pt mass activity of 1.75 A mg(Pt)(-1) at 0.9 ViR-free, which is significantly better than commercial MEA (0.25 A mg(Pt)(-1)). Interestingly, PtFe-FeNC catalysts possess enhanced durability, exhibiting a 12.5% decrease in peak power density compared to the 51.7% decrease of FeNC.",ultralow Pt; PtFe alloys; iron-nitrogen-carbon; oxygen reduction reaction; PEMFC,OXYGEN REDUCTION; PERFORMANCE; CATALYSTS,ultralow Pt;PtFe alloys;iron-nitrogen-carbon;oxygen reduction reaction;PEMFC;OXYGEN REDUCTION;PERFORMANCE;CATALYSTS,binwei@cqu.edu.cn; yxjiang@xmu.edu.cn; sgsun@xmu.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1936-0851,,,38112383,English,ACS NANO,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science,WOS:001139537500001,2-s2.0-85180967157,China,cqu.edu.cn,Xiamen Univ;Anhui Univ;Chinese Acad Sci;Chongqing Univ;Inst Adv Interdisciplinary Studies,"Xiamen Univ, China;Anhui Univ, China;Chinese Acad Sci, China;Chongqing Univ, China;Inst Adv Interdisciplinary Studies, China","Yin, Shuhu; Yan, Ya-Ni; Chen, Long; Cheng, Ningyan; Cheng, Xiaoyang; Huang, Rui; Huang, Huan; Zhang, Binwei; Jiang, Yan-Xia; Sun, Shi-Gang"
"Wu, Y.L., Liang, G.F., Chen, D., Li, Z.L., Xu, J.C., Huang, G.J., Yang, M.Z., Zhang, H., Chen, J., Xie, F.Y., Jin, Y.S., Wang, N., Sun, S.H., Meng, H.",Fe-N4 Doped Carbon Nanotube Cathode Catalyst for PEM Fuel Cells,2021,ACS APPLIED MATERIALS & INTERFACES,13,41,,48923,48933,11,26,10.1021/acsami.1c15554,,"[Wu, Yinlong; Liang, Guofeng; Chen, Di; Li, Zilong; Xu, Jinchang; Huang, Guoju; Jin, Yanshuo; Wang, Nan; Meng, Hui] Jinan Univ, Guangdong Prov Engn Technol Res Ctr Vacuum Coatin, Dept Phys,Siyuan Lab,Guangzhou Key Lab Vacuum Coa, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou 510632, Guangdong, Peoples R China; [Yang, Muzi; Zhang, Hao; Chen, Jian; Xie, Fangyan] Sun Yat Sen Univ, Instrumental Anal & Res Ctr, Guangzhou 510275, Guangdong, Peoples R China; [Sun, Shuhui] Inst Natl Rech Sci, Ctr Energy Mat & Telecommun, Quebec City, PQ J3X 1S2, Canada",,"The earth-abundant iron and nitrogen doped carbon (Fe-N-C) catalyst has great potential to substitute noble metal catalysts for oxygen reduction reaction (ORR) in H-2-O-2 proton exchange membrane fuel cells (PEMFCs). Herein, we report the preparation of Fe-N-4 moiety doped carbon nanotubes (CNTs) by ball milling and two-step pyrolysis with dual metal-organic frameworks (MOFs) as the precursor. This catalyst shows high ORR catalytic performance and stability. Different from traditional inorganic iron sources, the MOF structure can effectively prevent the iron metal from aggregating during pyrolysis. In PEMFC, the catalyst shows high current density (0.39 A/cm(2) at 0.7 V) and power density (850 mW/cm(2)). Such a method brings inspiration for the reasonable design of FeNC catalysts with high catalytic activity for H-2-O-2 PEMFCs.",electrocatalysis; carbon nanotubes; oxygen reduction reaction; non-precious metal catalyst; polymer electrolyte membrane fuel cells,OXYGEN-REDUCTION REACTION; N-C CATALYSTS; METAL-ORGANIC FRAMEWORK; SINGLE-ATOM CATALYSTS; POROUS CARBON; ACTIVE-SITES; TEMPLATE SYNTHESIS; FE/N/C CATALYSTS; NITROGEN; ELECTROCATALYSTS,electrocatalysis;carbon nanotubes;oxygen reduction reaction;non-precious metal catalyst;polymer electrolyte membrane fuel cells;OXYGEN-REDUCTION REACTION;N-C CATALYSTS;METAL-ORGANIC FRAMEWORK;SINGLE-ATOM CATALYSTS;POROUS CARBON;ACTIVE-SITES;TEMPLATE SYNTHESIS;FE/N/C CATALYSTS;NITROGEN;ELECTROCATALYSTS,nanwang@jnu.edu.cn; shuhui@emt.inrs.ca; tmh@jnu.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1944-8244,,,34628849,English,ACS APPL MATER INTER,Article,WoS,Science & Technology - Other Topics; Materials Science,WOS:000710924900057,2-s2.0-85117853409,China;Canada,jnu.edu.cn,Jinan Univ;Sun Yat Sen Univ;Inst Natl Rech Sci,"Jinan Univ, China;Sun Yat Sen Univ, China;Inst Natl Rech Sci, Canada","Wu, Yinlong; Liang, Guofeng; Chen, Di; Li, Zilong; Xu, Jinchang; Huang, Guoju; Yang, Muzi; Zhang, Hao; Chen, Jian; Xie, Fangyan; Jin, Yanshuo; Wang, Nan; Sun, Shuhui; Meng, Hui"
"Xiao, F., Wang, Y., Xu, G.L., Yang, F., Zhu, S., Sun, C.J., Cui, Y., Xu, Z., Zhao, Q., Jang, J., Qiu, X., Liu, E., Drisdell, W.S., Wei, Z., Gu, M., Amine, K., Shao, M.",Fe-N-C Boosts the Stability of Supported Platinum Nanoparticles for Fuel Cells,2022,Journal of the American Chemical Society,144,44,,20372,20384,,136,10.1021/jacs.2c08305,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85141296795&doi=10.1021%2Fjacs.2c08305&partnerID=40&md5=8ac77d5b537a83c24a691d41c8cef634,"Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, China; Argonne National Laboratory, Lemont, IL, United States; Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Chongqing University, Chongqing, China; Stanford Engineering, Stanford, CA, United States; Materials Science and Nano-engineering Department, Mohammed VI Polytechnic University, Ben Guerir, Marrakesh-Safi, Morocco; Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, Guangdong, China; Energy Institute, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Institute for Research and Medical Consultations, Imam Abdulrahman Bin Faisal University, Dammam, Ash Sharqiyah, Saudi Arabia","Xiao, Fei, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Wang, Yian, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Xu, Guiliang ‑l, Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Yang, Fei, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, China; Zhu, Shangqian, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Sun, Chengjun, Argonne National Laboratory, Lemont, IL, United States; Cui, Yingdan, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Xu, Zhiwen, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Zhao, Qinglan, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Jang, Juhee, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Qiu, Xiaoyi, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Liu, Ershuai, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Drisdell, Walter S., Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Wei, Zidong, Chongqing University, Chongqing, China; Gu, M. Danny, Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, China; Amine, Khalil M., Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States, Stanford Engineering, Stanford, CA, United States, Materials Science and Nano-engineering Department, Mohammed VI Polytechnic University, Ben Guerir, Marrakesh-Safi, Morocco, Institute for Research and Medical Consultations, Imam Abdulrahman Bin Faisal University, Dammam, Ash Sharqiyah, Saudi Arabia; Shao, Minhua, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, Guangdong, China, Energy Institute, Hong Kong University of Science and Technology, Hong Kong, Hong Kong","The poor durability of Pt-based nanoparticles dispersed on carbon black is the challenge for the application of long-life polymer electrolyte fuel cells. Recent work suggests that Fe- and N-codoped carbon (Fe-N-C) might be a better support than conventional high-surface-area carbon. In this work, we find that the electrochemical surface area retention of Pt/Fe-N-C is much better than that of commercial Pt/C during potential cycling in both acidic and basic media. In situ inductively coupled plasma mass spectrometry studies indicate that the Pt dissolution rate of Pt/Fe-N-C is 3 times smaller than that of Pt/C during cycling. Density functional theory calculations further illustrate that the Fe-N-C substrate can provide strong and stable support to the Pt nanoparticles and alleviate the oxide formation by adjusting the electronic structure. The strong metal-substrate interaction, together with a lower metal dissolution rate and highly stable support, may be the reason for the significantly enhanced stability of Pt/Fe-N-C. This finding highlights the importance of carbon support selection to achieve a more durable Pt-based electrocatalyst for fuel cells. © 2022 American Chemical Society. All rights reserved.",,Carbon black; Dissolution; Electrocatalysts; Electronic structure; Iron compounds; Mass spectrometry; Nanoparticles; Platinum compounds; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Substrates; Acidic media; Basic media; Co-doped; Dissolution rates; Electrochemical surface area; High surface area; Long life; Platinum nanoparticles; Polymer electrolyte fuel cells; Potential cycling; Density functional theory; acid; carbon; iron; nitrogen; oxide; platinum nanoparticle; Article; carbon cycling; cells; chemical structure; density functional theory; dissolution; electrocatalyst; electrochemical analysis; electron; fuel cell; in situ hybridization; inductively coupled plasma mass spectrometry; molecular stability; retention time; surface area,Carbon black;Dissolution;Electrocatalysts;Electronic structure;Iron compounds;Mass spectrometry;Nanoparticles;Platinum compounds;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Substrates;Acidic media;Basic media;Co-doped;Dissolution rates;Electrochemical surface area;High surface area;Long life;Platinum nanoparticles;Polymer electrolyte fuel cells;Potential cycling;Density functional theory;acid;carbon;iron;nitrogen;oxide;platinum nanoparticle;Article;carbon cycling;cells;chemical structure;electrocatalyst;electrochemical analysis;electron;fuel cell;in situ hybridization;inductively coupled plasma mass spectrometry;molecular stability;retention time;surface area,"M. Shao; Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Kowloon, Clear Water Bay, 999077, Hong Kong; email: kemshao@ust.hk",,,,,,American Chemical Society,00027863,,JACSA,36283038,English,J. Am. Chem. Soc.,Article,Scopus,,2-s2.0-85141296795,,Hong Kong;United States;China;Morocco;Saudi Arabia,ust.hk,,,"Xiao, F.; Wang, Y.; Xu, G.-L.; Yang, F.; Zhu, S.; Sun, C.-J.; Cui, Y.; Xu, Z.; Zhao, Q.; Jang, J.; Qiu, X.; Liu, E.; Drisdell, W.S.; Wei, Z.; Gu, M.; Amine, K.; Shao, M."
"Workman, M.J., Serov, A., Tsui, L.K., Atanassov, P., Artyushkova, K.",Fe-N-C Catalyst Graphitic Layer Structure and Fuel Cell Performance,2017,ACS ENERGY LETTERS,2,7,,1489,1493,5,116,10.1021/acsenergylett.7b00391,,"[Workman, Michael J.; Serov, Alexey; Tsui, Lok-Kun; Atanassov, Plamen; Artyushkova, Kateryna] Univ New Mexico, Dept Chem & Biol Engn, Ctr Microengn Mat, Albuquerque, NM 87131 USA",,"For targeted development of platinum group metal free (PGM-free) catalysts for proton exchange membrane fuel cell applications, it is critically important to elucidate the catalytic moieties of Fe-N-C materials as they relate to the structure and morphology of the graphitic layers of carbon, the catalyst basic building blocks. In this Letter, X-ray diffraction analysis with a carbon-specific structure refinement algorithm was performed on 12 Fe-N-C catalysts. Samples with fewer graphitic layers exhibit increased kinetic performance in fuel cell testing. This trend is consistent with the dominant active species residing within the graphitic plane as opposed to at the edges. We also report the performance of an optimized catalyst based on structure property predictions derived in a recently published report. This catalyst produces 0.44 mA cm(-2) at 0.85 V and has a maximum power density of 490 mW cm(-2) in 1 bar O-2 (not iR corrected).",,OXYGEN REDUCTION REACTION; NITROGEN-CARBON ELECTROCATALYSTS; DENSITY-FUNCTIONAL THEORY; FE/N/C-CATALYSTS; ACTIVE-SITES; IRON; CATHODES,OXYGEN REDUCTION REACTION;NITROGEN-CARBON ELECTROCATALYSTS;DENSITY-FUNCTIONAL THEORY;FE/N/C-CATALYSTS;ACTIVE-SITES;IRON;CATHODES,kartyush@unm.edu,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2380-8195,,,,English,ACS ENERGY LETT,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Science & Technology - Other Topics; Materials Science,WOS:000405979900003,2-s2.0-85031105528,United States,unm.edu,Univ New Mexico,"Univ New Mexico, United States","Workman, Michael J.; Serov, Alexey; Tsui, Lok-Kun; Atanassov, Plamen; Artyushkova, Kateryna"
"Wang, L., Wan, X., Liu, S., Xu, L., Shui, J.",Fe-N-C catalysts for PEMFC: Progress towards the commercial application under DOE reference,2019,Journal of Energy Chemistry,39,,,77,87,,107,10.1016/j.jechem.2018.12.019,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85061821606&doi=10.1016%2Fj.jechem.2018.12.019&partnerID=40&md5=2c7453e892c876395df49407f101a551,"School of Materials Science and Engineering, Beihang University, Beijing, China; State Grid Corporation of China, Beijing, China","Wang, Lina, School of Materials Science and Engineering, Beihang University, Beijing, China; Wan, Xin, School of Materials Science and Engineering, Beihang University, Beijing, China; Liu, Shuangyu, State Grid Corporation of China, Beijing, China; Xu, Li, State Grid Corporation of China, Beijing, China; Shui, Jianglan, School of Materials Science and Engineering, Beihang University, Beijing, China","Proton exchange membrane fuel cells (PEMFC) have attracted much attention because of their high energy conversion efficiency, high power density and zero emission of pollutants. However, the high cost of the cathode platinum group metal (PGM) catalysts creates a barrier for the large-scale application of PEMFC. Tremendous efforts have been devoted to the development of low-cost PGM-free catalysts, especially the Fe-N-C catalysts, to replace the expensive PGM catalysts. However, the characterization methods and evaluation standards of the catalysts varies, which is not conducive to the comparison of PGM-free catalysts. U.S. Department of energy (DOE) is the only authority that specifies the testing standards and activity targets for PGM-free catalysts. In this review, the major breakthroughs of Fe-N-C catalysts are outlined with the reference of DOE standards and targets. The preparation and characteristics of these highly active Fe-N-C catalysts are briefly introduced. Moreover, the efforts on improving the mass transfer and the durability issue of Fe-N-C fuel cell are discussed. Finally, the prospective directions concerning the comprehensive evaluation of the Fe-N-C catalysts are proposed. © 2019 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences",Activity targets; Fe-N-C catalysts; PEMFC; Test standards; U.S. DOE,Catalysts; Conversion efficiency; Costs; Iron compounds; Mass transfer; Characterization methods; Commercial applications; Comprehensive evaluation; High energy conversions; Large-scale applications; Test standards; U.S. Department of Energy; U.S. DOE; Proton exchange membrane fuel cells (PEMFC),Activity targets;Fe-N-C catalysts;PEMFC;Test standards;U.S. DOE;Catalysts;Conversion efficiency;Costs;Iron compounds;Mass transfer;Characterization methods;Commercial applications;Comprehensive evaluation;High energy conversions;Large-scale applications;U.S. Department of Energy;Proton exchange membrane fuel cells (PEMFC),"L. Xu; Material Laboratory of State Grid Corporation of China, Global Energy Interconnection Research Institute, Beijing, 102211, China; email: sinoxuli@foxmail.com",,,,,,Elsevier B.V.,20954956,,,,English,J. Energy Chem.,Review,Scopus,,2-s2.0-85061821606,,China,foxmail.com,,,"Wang, L.; Wan, X.; Liu, S.; Xu, L.; Shui, J."
"Nabac, Y., Nagata, S., Aoki, T., Tanida, H., Imai, H.",Fe/N/C cathode catalyst prepared from a low content of fe precursor to obtain atomically dispersed metal center,2018,ECS Transactions,86,13,,559,565,,0,10.1149/08613.0559ecst,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85058294590&doi=10.1149%2F08613.0559ecst&partnerID=40&md5=d9ba52a9a245b077166a6f40f430d7cb,"Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; Device Analysis Department, Nissan Arc, Ltd., Yokosuka, Kanagawa, Japan","Nabac, Y., Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; Nagata, Shinsuke, Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; Aoki, Tsutomu, Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; Tanida, Hajime, Device Analysis Department, Nissan Arc, Ltd., Yokosuka, Kanagawa, Japan; Imai, Hideto, Device Analysis Department, Nissan Arc, Ltd., Yokosuka, Kanagawa, Japan","A Fe/N/C oxygen reduction catalyst was prepared from polyimide nano-particles containing a low content of Fe additive. The new preparation method can provide highly active ORR catalyst but can avoid the use of HCl, which was necessary to wash out extraordinary Fe species. The kinetics was investigated in detail by the RRDE voltammetry associated with the correction of the quasi-four electron reduction, and the contribution of 2+2 electron pathway is considerable. The obtained Fe(0.5)/PI catalyst was tested in MEA and exhibited a quite promising fuel cell performance. © 2018 by The Electrochemical Society. All rights reserved.",,Catalysts; Electrolytic reduction; Nanoparticles; Polyelectrolytes; Cathode catalyst; Content of Fe; Dispersed metals; Four-electron reduction; Fuel cell performance; Orr catalysts; Oxygen reduction catalysts; Preparation method; Proton exchange membrane fuel cells (PEMFC),Catalysts;Electrolytic reduction;Nanoparticles;Polyelectrolytes;Cathode catalyst;Content of Fe;Dispersed metals;Four-electron reduction;Fuel cell performance;Orr catalysts;Oxygen reduction catalysts;Preparation method;Proton exchange membrane fuel cells (PEMFC),,"Jones, D.J.; Gasteiger, H.; Uchida, H.; Schmidt, T.J.; Buechi, F.; Swider-Lyons, K.E.; Pivovar, B.S.; Pintauro, P.N.; Ramani, V.K.; Fenton, J.M.; Strasser, P.; Ayers, K.E.; Weber, A.Z.; Fuller, T.F.; Mantz, R.A.; Xu, H.; Coutanceau, C.; Mitsushima, S.; Narayan, S.; Shirvanian, P.; Kim, Y.-T.; Gochi-Ponce, Y.",,"Symposium on Polymer Electrolyte Fuel Cells and Electrolyzers 18, PEFC and E 2018 - AiMES 2018, ECS and SMEQ Joint International Meeting",Cancun,2018-09-30 through 2018-10-04,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-85058294590,,Japan,No email,,,"Nabac, Y.; Nagata, S.; Aoki, T.; Tanida, H.; Imai, H."
"Yuan, B., Nam, G., Li, P., Wang, S., Liu, X., Cho, J.",Fe-N-C combined with Fe 100-x-y-z P x O y N z porous hollow spheres on a phosphoric acid group-rich N-doped carbon as an electrocatalyst for zinc-air battery,2019,Applied Surface Science,481,,,498,504,,7,10.1016/j.apsusc.2019.03.137,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85063008712&doi=10.1016%2Fj.apsusc.2019.03.137&partnerID=40&md5=bfbd495b4816e7b8d299a8570fb9fde9,"State Key Laboratory Base of Eco-chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China; Department of Energy Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea","Yuan, Bing, State Key Laboratory Base of Eco-chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China; Nam, Gyutae, Department of Energy Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea; Li, Ping, State Key Laboratory Base of Eco-chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China; Wang, Shuai, State Key Laboratory Base of Eco-chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China; Liu, Xi'en, State Key Laboratory Base of Eco-chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China; Cho, Jaephil P., Department of Energy Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea","Replacing the commercial Pt/C with non-precious metal-based electrocatalysts in the proton exchange membrane fuel cells and metal-air batteries is still challenging. Herein, an electrocatalyst (described as Fe-N-C/Fe <inf>100-x-y-z</inf> P <inf>x</inf> O <inf>y</inf> N <inf>z</inf> /NPC, NPC is N, P co-doped carbon) composed of multiple active components, such as NPC, iron-based porous hollow spheres and Fe-N-C, is reported, which exhibits an excellent activity that is comparable to state-of-the-art Pt/C for half-cell and full zinc-air battery in alkaline media. This catalyst exhibits an excellent activity with a half-wave potential of 0.86 V for the ORR in alkaline media, which is 10 mV more positive than to that of Pt/C (0.85 V), and a gravimetric energy density for zinc-air battery is up to 675 Wh Kg <inf>zn</inf> −1 . The excellent activity is attributed to the synergetic effect of active NPC, iron-based porous hollow spheres (Fe <inf>100-x-y-z</inf> P <inf>x</inf> O <inf>y</inf> N <inf>z</inf> ) and Fe-N-C in its structure. In addition, phosphoric acid groups are partially remained in the structure for our catalyst that make the catalyst excellent hydrophilicity. This work adds a new member into family of non-precious metal-based ORR electrocatalysts. © 2019 Elsevier B.V.",Electrocatalyst; Non-noble mental; Oxygen reduction reaction; Zinc-air battery,Carbon; Catalyst activity; Doping (additives); Electrocatalysts; Electrolytic reduction; Fuel cells; Iron; Iron compounds; Metal-air batteries; Phosphoric acid; Precious metals; Proton exchange membrane fuel cells (PEMFC); Spheres; Zinc; Active components; Gravimetric energy densities; Half-wave potential; Non-noble mental; Non-precious metals; ORR electrocatalysts; Oxygen reduction reaction; Synergetic effect; Zinc air batteries,Electrocatalyst;Non-noble mental;Oxygen reduction reaction;Zinc-air battery;Carbon;Catalyst activity;Doping (additives);Electrocatalysts;Electrolytic reduction;Fuel cells;Iron;Iron compounds;Metal-air batteries;Phosphoric acid;Precious metals;Proton exchange membrane fuel cells (PEMFC);Spheres;Zinc;Active components;Gravimetric energy densities;Half-wave potential;Non-precious metals;ORR electrocatalysts;Synergetic effect;Zinc air batteries,"S. Wang; State Key Laboratory Base of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao, 266042, China; email: qustwangshuai@qust.edu.cn",,,,,,Elsevier B.V.,01694332,0873392558,ASUSE,,English,Appl Surf Sci,Article,Scopus,,2-s2.0-85063008712,,China;South Korea,qust.edu.cn,,,"Yuan, B.; Nam, G.; Li, P.; Wang, S.; Liu, X.; Cho, J."
"Wan, Y., Yu, L.H., Yang, B.X., Li, C.H., Fang, C., Guo, W., Xiao, F.X., Lin, Y.M.",Fe-N-C core-shell catalysts with single low-spin Fe(II)-N4 species for oxygen reduction reaction and high-performance proton exchange membrane fuel cells,2024,JOURNAL OF ENERGY CHEMISTRY,93,,,538,546,9,12,10.1016/j.jechem.2024.01.074,,"[Wan, Yan; Yang, Bingxin; Li, Caihong; Fang, Chen; Guo, Wei; Lin, Yangming] Chinese Acad Sci, Xiamen Inst Rare Earth Mat, Haixi Inst, Xiamen Key Lab Rare Earth Photoelect Funct Mat, Xiamen 361021, Fujian, Peoples R China; [Yu, Linhui] Chinese Acad Sci, Inst Urban Environm, CAS Key Lab Urban Pollutant Convers, Xiamen 361021, Fujian, Peoples R China; [Wan, Yan; Yang, Bingxin; Li, Caihong; Fang, Chen; Guo, Wei; Lin, Yangming] Chinese Acad Sci, Fujian Inst Res Struct Matter, Fuzhou 350002, Fujian, Peoples R China; [Xiao, Fang -Xing] Fuzhou Univ, Coll Mat Sci & Engn, New Campus, Minhou 350108, Fujian, Peoples R China; [Yang, Bingxin] Fujian Normal Univ, Coll Chem & Mat Sci, Fuzhou 350117, Fujian, Peoples R China",,"Fe -N -doped carbon materials (Fe -N -C) are promising candidates for oxygen reduction reaction (ORR) relative to Pt -based catalysts in proton exchange membrane fuel cells (PEMFCs). However, the intrinsic contributions of Fe -N4 moiety with different chemical/spin states (e.g. D1, D2, D3) to ORR are unclear since various states coexist inevitably. In the present work, Fe -N -C core-shell nanocatalyst with single lowspin Fe(II)-N4 species (D1) is synthesized and identified with ex -situ ultralow temperature M & ouml;ssbauer spectroscopy (T = 1.6 K) that could essentially differentiate various Fe -N4 states and invisible Fe -O species. By quantifying with CO -pulse chemisorption, site density and turnover frequency of Fe -N -C catalysts reach 2.4 x 1019 site g-1 and 23 e site -1 s-1 during the ORR, respectively. Half -wave potential (0.915 VRHE) of the Fe -N -C catalyst is more positive (approximately 54 mV) than that of Pt/C. Moreover, we observe that the performance of PEMFCs on Fe -N -C almost achieves the 2025 target of the US Department of Energy by demonstrating a current density of 1.037 A cm -2 combined with the peak power density of 0.685 W cm -2, suggesting the critical role of Fe(II)-N4 site (D1). After 500 h of running, PEMFCs still deliver a power density of 1.26 W cm -2 at 1.0 bar H2 -O2. An unexpected rate -determining step is figured out by isotopic labelling experiment and theoretical calculation. This work not only offers valuable insights regarding the intrinsic contribution of Fe -N4 with a single spin state to alkaline/acidic ORR, but also provides great opportunities for developing high-performance stable PEMFCs. (c) 2024 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.",Fuel cells; Oxygen reduction reaction; Non-platinum group metals (PGMs); Isotopic labelling; Active site; TOF,ACTIVE-SITES; MOLECULAR CALCULATIONS; FE/N/C-CATALYSTS; BASIS-SETS; CARBON; IRON; ELECTROCATALYSTS; MOSSBAUER; EFFICIENT; DENSITY,Fuel cells;Oxygen reduction reaction;Non-platinum group metals (PGMs);Isotopic labelling;Active site;TOF;ACTIVE-SITES;MOLECULAR CALCULATIONS;FE/N/C-CATALYSTS;BASIS-SETS;CARBON;IRON;ELECTROCATALYSTS;MOSSBAUER;EFFICIENT;DENSITY,fxxiao@fzu.edu.cn; xmlinyangming@fjirsm.ac.cn,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2095-4956,,,,English,J ENERGY CHEM,Article,WoS,Chemistry; Energy & Fuels; Engineering,WOS:001225750700001,2-s2.0-85187959105,China,fzu.edu.cn,Chinese Acad Sci;Fuzhou Univ;Fujian Normal Univ,"Chinese Acad Sci, China;Fuzhou Univ, China;Fujian Normal Univ, China","Wan, Yan; Yu, Linhui; Yang, Bingxin; Li, Caihong; Fang, Chen; Guo, Wei; Xiao, Fang -Xing; Lin, Yangming"
"Saveleva, V.A., Kumar, K., Theis, P., Salas, N.S., Kramm, U.I., Jaouen, F., Maillard, F., Glatzel, P.",Fe-N-C Electrocatalyst and Its Electrode: Are We Talking about the Same Material?,2023,ACS APPLIED ENERGY MATERIALS,6,2,,611,616,6,26,10.1021/acsaem.2c03736,,"[Kumar, Kavita; Maillard, Frederic] Univ Savoie Mont Blanc, Univ Grenoble Alpes, CNRS, Grenoble INP,LEPMI, F-38000 Grenoble, France; [Theis, Pascal; Salas, Nicole Segura; Kramm, Ulrike I.] Tech Univ Darmstadt, Dept Chem, Catalysts & Electrocatalysts Grp, D-64287 Darmstadt, Germany; [Jaouen, Frederic] Univ Montpellier, ICGM, CNRS, ENSCM, F-34293 Montpellier, France; [Saveleva, Viktoriia A.; Glatzel, Pieter] Tech Univ Darmstadt, Dept Chem, TU Darmstadt, Catalysts & Electrocatalysts Grp, D-64287 Darmstadt, Germany",,"Evaluation of the electrocatalyst performance data includes an electrode preparation step. Herein, we compare the structural composition of Fe-N-C materials, used to electrocatalyze the oxygen reduction reaction in proton-exchange membrane fuel cells, before and after catalyst layer preparation. The effects of this step on the electronic structure and local coordination of Fe were investigated by X-ray absorption (XAS) and emission spectroscopies (XES), for Fe-N-C materials prepared via different synthetic routes. This work underlines the importance of determining the Fe-N-C catalyst structure in the prepared electrode for further studies of the structure-activity-stability correlations.",electrocatalyst; X-ray absorption spectroscopy; X-ray emission spectroscopy; catalyst layer; Fe-N-C,MEMBRANE FUEL-CELLS; OXYGEN-REDUCTION; K-EDGE; CATALYSTS; SPECTROSCOPY; COORDINATION; PERFORMANCE; MINERALS,electrocatalyst;X-ray absorption spectroscopy;X-ray emission spectroscopy;catalyst layer;Fe-N-C;MEMBRANE FUEL-CELLS;OXYGEN-REDUCTION;K-EDGE;CATALYSTS;SPECTROSCOPY;COORDINATION;PERFORMANCE;MINERALS,viktoriia.saveleva@esrf.fr,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2574-0962,,,,English,ACS APPL ENERG MATER,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000911959000001,2-s2.0-85146187578,France;Germany,esrf.fr,Univ Savoie Mont Blanc;Tech Univ Darmstadt;Univ Montpellier,"Univ Savoie Mont Blanc, France;Tech Univ Darmstadt, Germany;Univ Montpellier, France","Saveleva, Viktoriia A.; Kumar, Kavita; Theis, Pascal; Salas, Nicole Segura; Kramm, Ulrike I.; Jaouen, Frederic; Maillard, Frederic; Glatzel, Pieter"
"Kumar, K., Asset, T., Li, X., Liu, Y., Yan, X., Chen, Y., Mermoux, M., Pan, X., Atanassov, P., Maillard, F., Dubau, L.",Fe-N-C Electrocatalysts' Durability: Effects of Single Atoms' Mobility and Clustering,2021,ACS Catalysis,11,2,,484,494,,76,10.1021/acscatal.0c04625,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099024112&doi=10.1021%2Facscatal.0c04625&partnerID=40&md5=1105e22a5ffa53c22d86595c7e820f0c,"Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Samueli School of Engineering, Irvine, CA, United States; Laboratoire de Physique des Solides, Orsay, Ile-de-France, France; Samueli School of Engineering, Irvine, CA, United States","Kumar, Kavita, Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Asset, Tristan, Samueli School of Engineering, Irvine, CA, United States; Li, Xiaoyan, Laboratoire de Physique des Solides, Orsay, Ile-de-France, France; Liu, Yuanchao, Samueli School of Engineering, Irvine, CA, United States; Yan, Xingxu, Samueli School of Engineering, Irvine, CA, United States; Chen, Yechuan, Samueli School of Engineering, Irvine, CA, United States; Mermoux, Michel, Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Pan, Xiaoqing, Samueli School of Engineering, Irvine, CA, United States; Atanassov, Plamen B., Samueli School of Engineering, Irvine, CA, United States; Maillard, Frédéric M., Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Dubau, Laetitia, Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France","Atomically dispersed (or single atom) iron-nitrogen-carbon (Fe-N-C) catalysts are promising alternatives to platinum group metal nanoparticles supported on dispersed carbon as a cathode material in proton-exchange membrane fuel cells. Here, the degradation mechanism of Fe-N-C catalysts, synthesized by the sacrificial support method (SSM), was investigated by conducting accelerated stress tests under the ""load cycling""protocol (i.e. from 0.6 to 1.0 V vs the reversible hydrogen electrode). Electrocatalyst activity toward the oxygen reduction reaction (ORR) was studied for a SSM-derived material, obtained by a single pyrolysis under a 7% H2 atmosphere (Fe-HT1) and juxtaposed to that of a catalyst derived from the same sample, but subjugated to a second pyrolysis under 10% NH3 (noted as Fe-HT2). Several findings can be highlighted: (i) the second pyrolysis results in the skewing of the mesopore size toward higher diameter, along with an increase in iron content and N-pyridinic moieties, leading to a combined benefit in terms of ORR activity and selectivity, (ii) the morphological changes of these catalysts during ageing are drastically different depending on whether they were exposed to a second pyrolysis as, for example, (iii) for Fe-HT2, the formation of Fe-clusters was observed after the load cycling ageing protocol performed at T = 80 °C, along with the partial corrosion of the amorphous domains. No clustering was observed at T = 60 °C concomitantly with a higher ORR mass activity retention providing some guidelines to improve the stability of Fe-N-C materials. © 2020 American Chemical Society.",atomically dispersed catalysts; Fe-N-C electrocatalysts; metallic clustering; oxygen reduction reaction (ORR); single atom mobility,Ammonia; Carbon; Catalyst selectivity; Cathodes; Corrosion; Degradation; Electrocatalysts; Electrolytic reduction; Iron; Metal fuels; Metal nanoparticles; Oxygen reduction reaction; Proton exchange membrane fuel cells (PEMFC); Pyrolysis; Accelerated stress; Degradation mechanism; Derived materials; Morphological changes; Orr activities; Platinum group metals; Reversible hydrogen electrodes; Support method; Iron compounds,atomically dispersed catalysts;Fe-N-C electrocatalysts;metallic clustering;oxygen reduction reaction (ORR);single atom mobility;Ammonia;Carbon;Catalyst selectivity;Cathodes;Corrosion;Degradation;Electrocatalysts;Electrolytic reduction;Iron;Metal fuels;Metal nanoparticles;Oxygen reduction reaction;Proton exchange membrane fuel cells (PEMFC);Pyrolysis;Accelerated stress;Degradation mechanism;Derived materials;Morphological changes;Orr activities;Platinum group metals;Reversible hydrogen electrodes;Support method;Iron compounds,"L. Dubau; Université Grenoble Alpes, Université Savoie Mont-Blanc, CNRS, Grenoble-INP, LEPMI, Grenoble, 38000, France; email: laetitia.dubau@lepmi.grenoble-inp.fr; P. Atanassov; Department of Chemical and Biomolecular Engineering, National Fuel Cell Research Center (NFCRC), University of California Irvine, Irvine, 92697, United States; email: plamen.atanassov@uci.edu",,,,,,American Chemical Society,21555435,,ACCAC,,English,ACS Catal.,Article,Scopus,,2-s2.0-85099024112,,France;United States,lepmi.grenoble-inp.fr,,,"Kumar, K.; Asset, T.; Li, X.; Liu, Y.; Yan, X.; Chen, Y.; Mermoux, M.; Pan, X.; Atanassov, P.; Maillard, F.; Dubau, L."
"Yang, L., Su, Y., Li, W., Kan, X.",Fe/N/C electrocatalysts for oxygen reduction reaction in PEM fuel cells using nitrogen-rich ligand as precursor,2015,Journal of Physical Chemistry C,119,21,,11311,11319,,40,10.1021/jp511576q,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930624462&doi=10.1021%2Fjp511576q&partnerID=40&md5=9ed2c1a1fb615147b5e6a15c0bf561bd,"Anhui Key Laboratory of Chemo-Biosensing, Anhui Normal University, Wuhu, Anhui, China; Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research On the Structure of Matter Chinese Academy of Sciences, Fuzhou, Fujian, China; University of Chinese Academy of Sciences, Beijing, China","Yang, Lingling, Anhui Key Laboratory of Chemo-Biosensing, Anhui Normal University, Wuhu, Anhui, China, Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research On the Structure of Matter Chinese Academy of Sciences, Fuzhou, Fujian, China; Su, Yumiao, Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research On the Structure of Matter Chinese Academy of Sciences, Fuzhou, Fujian, China, University of Chinese Academy of Sciences, Beijing, China; Li, Wenmu, Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research On the Structure of Matter Chinese Academy of Sciences, Fuzhou, Fujian, China, University of Chinese Academy of Sciences, Beijing, China; Kan, Xianwen, Anhui Key Laboratory of Chemo-Biosensing, Anhui Normal University, Wuhu, Anhui, China","High temperature pyrolysis can significantly improve the activity and stability of Fe-based catalysts. However, unwanted iron nanoparticles, which are proven inactive to oxygen reduction reaction (ORR), will form under this procedure. Herein, a nitrogen-rich and hindrance multifunctional 6,7-di(pyridin-2-yl)pteridine-2,4-diamine (DPPD) monomer was deliberately designed and synthesized. High content of thermally stable nitrogen in DPPD can increase the degree of coordination with iron and provide a high content of active nitrogen after pyrolysis. Distorted nitrogen-rich ferrous complex polymers were successfully prepared to keep iron ions well separated and prevent them from aggregating during the heat treatment. Carbon-supported Fe-based catalysts with different initial iron loadings from 0.2 to 4.0 wt % were obtained. Transmission electron microscopy (TEM) revealed that there were no obvious nanocrystals observed, even the initial iron loading was up to 2.0 wt %. The electrochemical performance of the Fe-based catalysts was evaluated via cyclic voltammetry (CV) and linear sweep voltammetry (LSV). The result shows that an Fe-based catalyst with 2.0 wt % initial iron loading is the best ORR catalyst in acid media among all the iron loadings. Typically, in basic media, the catalyst with 2.0 wt % initial iron loading exhibits comparable electrocatalytic activity to commercial Pt/C material via an efficient four-electron-dominant ORR pathway coupled with better methanol tolerance as well as durability. XPS measurements confirmed that the outstanding activity of the catalyst with 2.0 wt % initial iron loading was likely attributed to higher content of pyridinic nitrogen, providing the highest density of active site structures. © 2015 American Chemical Society.",,Carbon; Catalysts; Cyclic voltammetry; Electrocatalysts; Electrolytic reduction; Fuel cells; Ionization of gases; Iron; Iron compounds; Metal ions; Nitrogen; Proton exchange membrane fuel cells (PEMFC); Reduction; Transmission electron microscopy; Active site structure; Degree of coordination; Electrocatalytic activity; Electrochemical performance; High-temperature pyrolysis; Linear sweep voltammetry; Methanol tolerance; Oxygen reduction reaction; Catalyst activity,Carbon;Catalysts;Cyclic voltammetry;Electrocatalysts;Electrolytic reduction;Fuel cells;Ionization of gases;Iron;Iron compounds;Metal ions;Nitrogen;Proton exchange membrane fuel cells (PEMFC);Reduction;Transmission electron microscopy;Active site structure;Degree of coordination;Electrocatalytic activity;Electrochemical performance;High-temperature pyrolysis;Linear sweep voltammetry;Methanol tolerance;Oxygen reduction reaction;Catalyst activity,,,,,,,American Chemical Society service@acs.org,19327447,,,,English,J. Phys. Chem. C,Article,Scopus,,2-s2.0-84930624462,,China,No email,,,"Yang, L.; Su, Y.; Li, W.; Kan, X."
"Zhou, Y.Z., Chen, G.B., Wang, Q., Wang, D., Tao, X.F., Zhang, T.R., Feng, X.L., Mullen, K.",Fe-N-C Electrocatalysts with Densely Accessible Fe-N4 Sites for Efficient Oxygen Reduction Reaction,2021,ADVANCED FUNCTIONAL MATERIALS,31,34,2102420,,,9,199,10.1002/adfm.202102420,,"[Zhou, Yazhou; Tao, Xiafang; Mullen, Klaus] Max Planck Inst Polymer Res, D-55128 Mainz, Germany; [Zhou, Yazhou; Wang, Ding; Tao, Xiafang] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Jiangsu, Peoples R China; [Chen, Guangbo; Feng, Xinliang] Tech Univ Dresden, Ctr Adv Elect Dresden Cfaed, D-01062 Dresden, Germany; [Chen, Guangbo; Feng, Xinliang] Tech Univ Dresden, Fac Chem & Food Chem, D-01062 Dresden, Germany; [Wang, Qing; Zhang, Tierui] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China",,"The development of iron and nitrogen co-doped carbon (Fe-N-C) electrocatalysts for the oxygen reduction reaction (ORR) in proton-exchange membrane fuel cells (PEMFCs) is a grand challenge due to the low density of accessible Fe-N-4 sites. Here, an in situ trapping strategy using nitrogen-rich molecules (e.g., melamine, MA) is demonstrated to enhance the amount of accessible Fe-N-4 sites in Fe-N-C electrocatalysts. The melamine molecules can participate in the coordination of Fe ions in zeolitic imidazolate frameworks to form Fe-N-6 sites within precursors. These Fe-N-6 sites are then converted into atomically dispersed Fe-N-4 sites during a pyrolytic process. Remarkably, the Fe-N-C/MA exhibits a high single-atom Fe content (3.5 wt.%), a large surface area (1160 m(2) g(-1)), and a high density of accessible FeN4 sites (45.7 x 10(19) sites g(-1)). As a result, Fe-N-C/MA shows a much enhanced ORR activity with a half-wave potential of 0.83 V (vs the reversible hydrogen electrode) in a 0.5 m H2SO4 electrolyte solution and a good performance in a PEMFC system with an activity of 80 mA cm(-2) at 0.8 V under 1.0 bar H-2/air. This work offers a promising approach toward high-performance carbon-based ORR electrocatalysts.",Fe; -N; -C catalysts; nitrogen-rich molecules trapping; oxygen reduction reaction; proton exchange membrane fuel cells; site density,CARBIDE-DERIVED CARBON; ACTIVE-SITES; POROUS CARBON; IRON CATALYSTS; FUEL-CELLS; IDENTIFICATION; ELECTROREDUCTION; GRAPHENE; CATHODES; DENSITY,Fe;-N;-C catalysts;nitrogen-rich molecules trapping;oxygen reduction reaction;proton exchange membrane fuel cells;site density;CARBIDE-DERIVED CARBON;ACTIVE-SITES;POROUS CARBON;IRON CATALYSTS;FUEL-CELLS;IDENTIFICATION;ELECTROREDUCTION;GRAPHENE;CATHODES;DENSITY,yazhou@ujs.edu.cn; xinliang.feng@tu-dresden.de; muellen@mpip-mainz.mpg.de,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1616-301X,,,,English,ADV FUNCT MATER,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000662776000001,2-s2.0-85107949720,Germany;China,ujs.edu.cn,Max Planck Inst Polymer Res;Jiangsu Univ;Tech Univ Dresden;Chinese Acad Sci,"Max Planck Inst Polymer Res, Germany;Jiangsu Univ, China;Tech Univ Dresden, Germany;Chinese Acad Sci, China","Zhou, Yazhou; Chen, Guangbo; Wang, Qing; Wang, Ding; Tao, Xiafang; Zhang, Tierui; Feng, Xinliang; Mullen, Klaus"
"Wan, X., Liu, X.F., Li, Y.C., Yu, R.H., Zheng, L.R., Yan, W.S., Wang, H., Xu, M., Shui, J.L.",Fe-N-C electrocatalyst with dense active sites and efficient mass transport for high-performance proton exchange membrane fuel cells,2019,NATURE CATALYSIS,2,3,,259,268,10,1266,10.1038/s41929-019-0237-3,,"[Wan, Xin; Liu, Xiaofang; Li, Yongcheng; Yu, Ronghai; Wang, Hui; Shui, Jianglan] Beihang Univ, Sch Mat Sci & Engn, Beijing, Peoples R China; [Zheng, Lirong] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing, Peoples R China; [Yan, Wensheng] Univ Sci & Technol China, CAS Ctr Excellence Nanosci, Natl Synchrotron Radiat Lab, Hefei, Anhui, Peoples R China; [Xu, Ming] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & & Mold Technol, Wuhan, Hubei, Peoples R China",,"To achieve the US Department of Energy 2018 target set for platinum-group metal-free catalysts (PGM-free catalysts) in proton exchange membrane fuel cells, the low density of active sites must be overcome. Here, we report a class of concave Fe-N-C single-atom catalysts possessing an enhanced external surface area and mesoporosity that meets the 2018 PGM-free catalyst activity target, and a current density of 0.047 A cm(-2) at 0.88 ViR-free under 1.0 bar H-2-O-2. This performance stems from the high density of active sites, which is realized through exposing inaccessible Fe-N-4 moieties (that is, increasing their utilization) and enhancing the mass transport of the catalyst layer. Further, we establish structure-property correlations that provide a route for designing highly efficient PGM-free catalysts for practical application, achieving a power density of 1.18 W cm(-2) under 2.5 bar H-2-O-2, and an activity of 129 mA cm(-2) at 0.8 ViR-free under 1.0 bar H-2-air.",,METAL-ORGANIC FRAMEWORK; OXYGEN REDUCTION; FE/N/C CATALYSTS; CATHODE CATALYSTS; IRON; CARBON; IDENTIFICATION; SPECTROSCOPY; NANOFRAMES; ELECTRODE,METAL-ORGANIC FRAMEWORK;OXYGEN REDUCTION;FE/N/C CATALYSTS;CATHODE CATALYSTS;IRON;CARBON;IDENTIFICATION;SPECTROSCOPY;NANOFRAMES;ELECTRODE,ming.xu@hust.edu.cn; shuijianglan@buaa.edu.cn,,"MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND",,,,NATURE PUBLISHING GROUP,2520-1158,,,,English,NAT CATAL,Article,WoS,Chemistry,WOS:000461099900017,2-s2.0-85062453169,China,hust.edu.cn,Beihang Univ;Chinese Acad Sci;Univ Sci & Technol China;Huazhong Univ Sci & Technol,"Beihang Univ, China;Chinese Acad Sci, China;Univ Sci & Technol China, China;Huazhong Univ Sci & Technol, China","Wan, Xin; Liu, Xiaofang; Li, Yongcheng; Yu, Ronghai; Zheng, Lirong; Yan, Wensheng; Wang, Hui; Xu, Ming; Shui, Jianglan"
"Li, J.W., Lin, C.Q., Chen, Z.Y., Huang, J., Yang, B., Lin, M.J., Shen, P.K., Tian, Z.Q.",Fe-N-C Electrocatalyst with d-π Interaction Induced by Submicropore Vacancies for Durable Oxygen Reduction Reaction in Proton-Exchange Membrane Fuel Cells,2025,ACS CATALYSIS,15,24,,20512,20530,19,0,10.1021/acscatal.5c06689,,"[Li, Jiawang; Lin, Changqing; Chen, Zhenyu; Huang, Ji; Yang, Bin; Lin, Mingjie; Shen, Pei Kang; Tian, Zhi Qun] Guangxi Univ, Collaborat Innovat Ctr Sustainable Energy Mat, Sch Phys Sci & Technol, Nanning 530004, Peoples R China; [Li, Jiawang; Lin, Changqing; Chen, Zhenyu; Huang, Ji; Yang, Bin; Lin, Mingjie; Shen, Pei Kang; Tian, Zhi Qun] State Key Lab Featured Met Mat & Life Cycle Safety, Guangxi Key Lab Electrochem Energy Mat, Nanning 530004, Peoples R China",,"Transition metal-nitrogen-carbon composites (M-N-C), which hold great promise as Pt-free oxygen reduction reaction (ORR) catalysts, still encounter issues such as low activity and insufficient durability in practical proton-exchange membrane fuel cells (PEMFCs). Herein, we present a specific design of Fe-N-C featuring rich submicropore vacancies (Fe-N-C-SMV). This was developed through a simple MgCl2<middle dot>6H(2)O-assisted pyrolysis process of the complexing compound consisting of 1,10-phenanthroline and FeCl3. The submicropore vacancies (<1.0 nm) generated by MgCl2<middle dot>6H(2)O break the molecular orbital symmetry of the FeN4 moiety, inducing an additional d-pi interaction between Fe and the N dopant. This interaction not only significantly reduces the oxygen adsorption energy but also regulates the spin polarization of Fe, thereby effectively inhibiting the demetalation of Fe. As a result, the Fe-N-C-SMV delivered a half-wave potential of 0.84 V in 0.5 M H2SO4 and a minimal durability decay of 7.0 mV after 10,000 cycles. Moreover, it shows a high practical PEMFC performance, with a maximum power output of 822 mW cm(-2) and a relatively low degradation rate of 0.665 mA cm(-2) h(-1). The crucial role of submicropore vacancies in simultaneously enhancing Fe-N-C discovered in this work provides an inspiration for developing nonprecious metal electrocatalysts for ORR in PEMFCs.",transition metal-nitrogen-carbon; iron-nitrogen-carbon; oxygen reduction reaction; submicropore vacancies; proton-exchange membrane cells,IRON SITES; CATALYSTS; EFFICIENT; TOOL,transition metal-nitrogen-carbon;iron-nitrogen-carbon;oxygen reduction reaction;submicropore vacancies;proton-exchange membrane cells;IRON SITES;CATALYSTS;EFFICIENT;TOOL,tianzhiqun@gxu.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2155-5435,,,,English,ACS CATAL,Article,WoS,Chemistry,WOS:001627527800001,2-s2.0-105023141738,China,gxu.edu.cn,Guangxi Univ;State Key Lab Featured Met Mat & Life Cycle Safety,"Guangxi Univ, China;State Key Lab Featured Met Mat & Life Cycle Safety, China","Li, Jiawang; Lin, Changqing; Chen, Zhenyu; Huang, Ji; Yang, Bin; Lin, Mingjie; Shen, Pei Kang; Tian, Zhi Qun"
"Liu, S., Meyer, Q., Li, Y., Zhao, T., Su, Z., Ching, K., Zhao, C.",Fe-N-C/Fe nanoparticle composite catalysts for the oxygen reduction reaction in proton exchange membrane fuel cells,2022,Chemical Communications,58,14,,2323,2326,,25,10.1039/d1cc07042h,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124636221&doi=10.1039%2Fd1cc07042h&partnerID=40&md5=5d84c95ca2ed56099ff54b86dcb2f2d5,"School of Chemistry, UNSW Sydney, Sydney, NSW, Australia","Liu, Shiyang, School of Chemistry, UNSW Sydney, Sydney, NSW, Australia; Meyer, Q., School of Chemistry, UNSW Sydney, Sydney, NSW, Australia; Li, Ylbing Bing, School of Chemistry, UNSW Sydney, Sydney, NSW, Australia; Zhao, Tingwen, School of Chemistry, UNSW Sydney, Sydney, NSW, Australia; Su, Zhen, School of Chemistry, UNSW Sydney, Sydney, NSW, Australia; Ching, Karin, School of Chemistry, UNSW Sydney, Sydney, NSW, Australia; Zhao, Chuan, School of Chemistry, UNSW Sydney, Sydney, NSW, Australia","Replacing Pt-based catalysts with cost-effective, highly efficient, and durable platinum group metal-free catalysts for the oxygen reduction reaction (ORR) is crucial for commercializing hydrogen fuel cells. Herein, we present a highly active Fe-N-C electrocatalyst that contains both Fe nanoparticles and FeNx active sites derived from an Fe-doped carbonized zeolitic imidazolate framework (ZIF-8). It is found that adjusting the doping amount of Fe in the Fe-doped ZIF-8 precursor alters the morphology of the catalyst after heat treatment. The Fe-N-C-300 composite catalyst with the optimized Fe doping amount exhibits excellent activity, good stability, and remarkable methanol tolerance in the challenging acid environment. This study reveals that a suitable amount of Fe nanoparticles in the catalyst can alter the structure of the FeNx active moieties and increase three-phase boundaries to boost the mass transport, thus leading to improved fuel cell performance. This will have implications for using Fe-N-C catalysts in real applications, as the formation of Fe NPs during the synthesis and reaction is almost inevitable. © 2022 The Royal Society of Chemistry.",,Cost effectiveness; Electrolytic reduction; Iron; Iron compounds; Nanocatalysts; Nanoparticles; Oxygen; Oxygen reduction reaction; Proton exchange membrane fuel cells (PEMFC); Composite catalysts; Cost effective; Fe nanoparticles; Fe-doped; Metal-free catalysts; Platinum group metals; Proton-exchange membranes fuel cells; Pt-based catalyst; ]+ catalyst; Electrocatalysts; carbon nanoparticle; iron; iron nanoparticle; methanol; nitrogen; proton; unclassified drug; zeolitic imidazolate framework; activation analysis; Article; carbonization; catalyst; chemical structure; environmental impact; heat treatment; molecular stability; reaction optimization; reduction (chemistry); synthesis,Cost effectiveness;Electrolytic reduction;Iron;Iron compounds;Nanocatalysts;Nanoparticles;Oxygen;Oxygen reduction reaction;Proton exchange membrane fuel cells (PEMFC);Composite catalysts;Cost effective;Fe nanoparticles;Fe-doped;Metal-free catalysts;Platinum group metals;Proton-exchange membranes fuel cells;Pt-based catalyst;]+ catalyst;Electrocatalysts;carbon nanoparticle;iron nanoparticle;methanol;nitrogen;proton;unclassified drug;zeolitic imidazolate framework;activation analysis;Article;carbonization;catalyst;chemical structure;environmental impact;heat treatment;molecular stability;reaction optimization;reduction (chemistry);synthesis,"C. Zhao; School of Chemistry, The University of New South Wales, Sydney, 2052, Australia; email: chuan.zhao@unsw.edu.au",,,,,,Royal Society of Chemistry,13597345,,CHCOF,35076040,English,Chem. Commun.,Article,Scopus,,2-s2.0-85124636221,,Australia,unsw.edu.au,,,"Liu, S.; Meyer, Q.; Li, Y.; Zhao, T.; Su, Z.; Ching, K.; Zhao, C."
"Pedersen, A., Snitkoff-Sol, R.Z., Presman, Y., Dubau, L., Cai, R.S., Barrio, J., Haigh, S.J., Maillard, F., Stephens, I.E.L., Titirici, M.M., Elbaz, L.",Fe-N-C in Proton Exchange Membrane Fuel Cells: Impact of Ionomer Loading on Degradation and Stability,2025,ADVANCED ENERGY MATERIALS,15,25,,,,14,1,10.1002/aenm.202403920,,"[Pedersen, Angus; Stephens, Ifan E. L.] Imperial Coll London, Royal Sch Mines, Dept Mat, London SW7 2AZ, England; [Pedersen, Angus; Barrio, Jesus; Titirici, Maria-Magdalena] Imperial Coll London, Dept Chem Engn, London SW7 2AZ, England; [Pedersen, Angus; Snitkoff-Sol, Rifael Z.; Presman, Yan; Elbaz, Lior] Bar Ilan Univ, Inst Nanotechnol & Adv Mat, IL-5290002 Ramat Gan, Israel; [Pedersen, Angus; Snitkoff-Sol, Rifael Z.; Presman, Yan; Elbaz, Lior] Bar Ilan Univ, Dept Chem, Ramat Gan 5290002, Israel; [Dubau, Laetitia; Maillard, Frederic] Univ Grenoble Alpes, Univ Savoie Mont Blanc, CNRS, Grenoble INP,LEPMI, F-38000 Grenoble, France; [Cai, Rongsheng; Haigh, Sarah J.] Univ Manchester, Dept Mat, Manchester M13 9PL, England; [Cai, Rongsheng] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China; [Titirici, Maria-Magdalena] Tohoku Univ, Adv Inst Mat Res, WPI AIMR, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan",,"Fe single atoms in N-doped C (Fe-N-C) present the most promising replacement for carbon-supported Pt-based catalysts for the O2 reduction reaction at the cathode of proton exchange membrane fuel cells (PEMFCs). However, it remains unclear how the I/C ratio affects Fe-N-C degradation and the stability of single Fe atom active sites (FeNx). Here, an accelerated stress test (AST) protocol is combined with emerging electrochemical techniques for a porous Fe-N-C in PEMFC with a range of I/C ratios. The PEMFC current density degradation rates are found to be comparable; however, with increased I/C ratio the additional FeNx sites accessed are more stable, as shown by their higher active site stability number (electrons passed per FeNx lost) at the end of the AST protocol. Meanwhile, the initial rate of TOF decay is suppressed with increasing I/C. Electrochemical process changes are studied via distribution of relaxation times analysis. Minor changes in H+ and O2 transport resistance at low current density prove kinetic degradation dominants at high potentials. These findings demonstrate how electrochemical techniques can be combined with stability metrics to determine and deconvolute changes from the active site to device level electrochemical processes in PEMFCs.",distribution relaxation times; Fourier transformed alternating current voltammetry; ionomer; PEMFC; single atom catalyst,ACTIVE-SITE DENSITY; OXYGEN REDUCTION CATALYSTS; TURNOVER FREQUENCY; METAL; PERFORMANCE; IMPEDANCE,distribution relaxation times;Fourier transformed alternating current voltammetry;ionomer;PEMFC;single atom catalyst;ACTIVE-SITE DENSITY;OXYGEN REDUCTION CATALYSTS;TURNOVER FREQUENCY;METAL;PERFORMANCE;IMPEDANCE,a.pedersen19@imperial.ac.uk; m.titirici@imperial.ac.uk; lior.elbaz@biu.ac.il,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1614-6832,,,,English,ADV ENERGY MATER,Article,WoS,Chemistry; Energy & Fuels; Materials Science; Physics,WOS:001356964500001,2-s2.0-85208953104,United Kingdom;Israel;France;China;Japan,imperial.ac.uk,Imperial Coll London;Bar Ilan Univ;Univ Grenoble Alpes;Univ Manchester;Chinese Acad Sci;Tohoku Univ,"Imperial Coll London, United Kingdom;Bar Ilan Univ, Israel;Univ Grenoble Alpes, France;Univ Manchester, United Kingdom;Chinese Acad Sci, China;Tohoku Univ, Japan","Pedersen, Angus; Snitkoff-Sol, Rifael Z.; Presman, Yan; Dubau, Laetitia; Cai, Rongsheng; Barrio, Jesus; Haigh, Sarah J.; Maillard, Frederic; Stephens, Ifan E. L.; Titirici, Maria-Magdalena; Elbaz, Lior"
"Ren, H., Wang, Y., Yang, Y., Tang, X., Peng, Y., Peng, H., Xiao, L., Lu, J., Abruna, H.D., Zhuang, L.",Fe/N/C nanotubes with atomic Fe sites: A highly active cathode catalyst for alkaline polymer electrolyte fuel cells,2017,ACS Catalysis,7,10,,6485,6492,,152,10.1021/acscatal.7b02340,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85032699611&doi=10.1021%2Facscatal.7b02340&partnerID=40&md5=c7970a17e3d8d23891b68835ec46480b,"Wuhan University, Wuhan, Hubei, China; Wuhan University, Wuhan, Hubei, China; Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, United States","Ren, Huan, Wuhan University, Wuhan, Hubei, China; Wang, Ying, Wuhan University, Wuhan, Hubei, China, Wuhan University, Wuhan, Hubei, China; Yang, Yao, Wuhan University, Wuhan, Hubei, China; Tang, Xun, Wuhan University, Wuhan, Hubei, China; Peng, Yanqiu, Wuhan University, Wuhan, Hubei, China; Peng, Hanqing, Wuhan University, Wuhan, Hubei, China; Xiao, Li, Wuhan University, Wuhan, Hubei, China; Lu, Juntao, Wuhan University, Wuhan, Hubei, China; Abruña, Hèctor D., Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, United States; Zhuang, Lin, Wuhan University, Wuhan, Hubei, China, Wuhan University, Wuhan, Hubei, China","Fe-containing N-doped carbons (Fe/N/C) are a promising Pt-alternative catalyst for the oxygen reduction reaction (ORR) and are believed to be more stable in alkaline media than in acids and thus particularly suitable to be applied as the cathode catalyst for alkaline polymer electrolyte fuel cells (APEFCs). However, there has hitherto been no successful report on high-performance APEFC based on the Fe/N/C cathode, the reason for which is still not quite clear. Here we report a highperformance Fe/N/C catalyst and its application in APEFC. The catalyst precursor is adenosine, an environmentally benign Nrich biomolecule, which is polymerized via a solvothermal process and then carbonized through pyrolysis. The resulting Fe/N/C nanotubes are thoroughly characterized by a variety of microscopy and spectroscopy (SEM, TEM, XRD, XPS, Raman, Mössbauer, and STEM-EELS), which reveal a high surface N/C ratio (8 at%) and atomic Fe sites well dispersed at the wall of the nanotubes. The catalytic sites are identified to be Fe-N<inf>4</inf>. The volume-specific catalytic activity of the Fe/N/C catalyst toward the ORR is as good as that of the commercial 20 wt % Pt/C catalyst in alkaline solutions, and better in durability. The electronic conductivity of Fe/N/C turns out to be trivial in rotating-disk electrode experiments but key for fuel cell tests. The APEFC with Fe/N/C cathode (2 mg/cm2 in catalyst loading) exhibits a peak power density greater than 450 mW/cm2, the thus-far highest record in the literature for APEFC using a nonprecious metal cathode. Our findings not only deepen the understanding of the structure.activity relationship of the Fe/N/C catalyst but also mark a step toward its real application in APEFC. © 2017 American Chemical Society.",Alkaline polymer electrolyte fuel cells; Atomic Fe sites; Fe-containing N-doped carbons; Nanotubes; Nonprecious metal catalysts; Oxygen reduction reaction; Structure-activity relationship,Alkaline fuel cells; Atoms; Catalyst activity; Cathodes; Doping (additives); Electrolytic reduction; Electron energy loss spectroscopy; Gas fuel purification; Iron metallography; Nanocatalysts; Nanotubes; Oxygen reduction reaction; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Alkaline polymer electrolyte fuel cells; Fe sites; N-doped; Non-precious metal catalysts; Structure activity relationships; Polyelectrolytes,Alkaline polymer electrolyte fuel cells;Atomic Fe sites;Fe-containing N-doped carbons;Nanotubes;Nonprecious metal catalysts;Oxygen reduction reaction;Structure-activity relationship;Alkaline fuel cells;Atoms;Catalyst activity;Cathodes;Doping (additives);Electrolytic reduction;Electron energy loss spectroscopy;Gas fuel purification;Iron metallography;Nanocatalysts;Proton exchange membrane fuel cells (PEMFC);Solid electrolytes;Fe sites;N-doped;Non-precious metal catalysts;Structure activity relationships;Polyelectrolytes,"L. Xiao; College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China; email: chem.lily@whu.edu.cn",,,,,,American Chemical Society,21555435,,ACCAC,,English,ACS Catal.,Article,Scopus,,2-s2.0-85032699611,,China;United States,whu.edu.cn,,,"Ren, H.; Wang, Y.; Yang, Y.; Tang, X.; Peng, Y.; Peng, H.; Xiao, L.; Lu, J.; Abruna, H.D.; Zhuang, L."
"Charreteur, F., Jaouen, F., Ruggeri, S., Dodelet, J.P.",Fe/N/C non-precious catalysts for PEM fuel cells: Influence of the structural parameters of pristine commercial carbon blacks on their activity for oxygen reduction,2008,ELECTROCHIMICA ACTA,53,6,,2925,2938,14,310,10.1016/j.electacta.2007.11.002,,"[Charreteur, Fanny; Jaouen, Frederic; Ruggeri, Stephane; Dodelet, Jean-Pol] INRS Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada",,"Fifteen commercial SRCC furnace carbon blacks of various grades, ranging from N1 to N9, were used as carbon supports in the preparation of Fe/N/C type electrocatalysts for the oxygen reduction reaction (ORR) in PEM fuel cell conditions. All catalysts were prepared by loading the various carbon grades with 0.2 wt.% Fe as iron acetate and heat-treating the resulting material at 950 degrees C in pure NH3. This reaction provides the nitrogen content and the microporosity necessary to synthesize and host the Fe/N/C catalytic sites that perform ORR. The maximum catalytic activity (V-pr max) for each carbon grade was determined by optimizing pyrolysis time. The aim of this study is to determine which structural characteristics of the pristine carbon black are important for maximizing catalytic activity. Three structural parameters that influenced the catalytic site density on the carbon support were identified. They are: (i) the average particle diameter of the pristine carbon black, d(particle), available from BET area measurements; (ii) the amount of disordered phase which is proportional to W-D, the width at half maximum of the D peak in the Raman spectrum of the pristine carbon; and (iii) the mean size of the graphene layers characterizing the graphitic crystallites in the carbon black, L-a. The latter is available by Rietveld analysis of the XRD spectra of the pristine carbons. The best catalytic activities are obtained for the smallest d(particle), the largest W-D, and the largest L-a. Optimizing these three parameters maximizes the fraction of the pristine carbon black that becomes microporous upon reaction with NH3 and, therefore, enables the formation of Fe/N/C catalytic sites. A FeN2+2/C structure bridging two adjacent graphitic crystallites is proposed as a potential model for most of the catalytic sites present in such Fe/N/C type catalysts. (C) 2007 Elsevier Ltd. All rights reserved.",oxygen electroreduction; O-2 reduction; O-2 electroreduction; electrocatalyst; non-noble metal,HEAT-TREATMENT AFFECT; FE-BASED CATALYSTS; CATHODE CATALYST; O-2 REDUCTION; C-N; ELECTROCHEMICAL CHARACTERISTICS; NONNOBLE ELECTROCATALYSTS; RAMAN; SITE; PYROLYSIS,oxygen electroreduction;O-2 reduction;O-2 electroreduction;electrocatalyst;non-noble metal;HEAT-TREATMENT AFFECT;FE-BASED CATALYSTS;CATHODE CATALYST;C-N;ELECTROCHEMICAL CHARACTERISTICS;NONNOBLE ELECTROCATALYSTS;RAMAN;SITE;PYROLYSIS,jaouen@emt.inrs.ca; dodelet@emt.inrs.ca,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000253213600034,2-s2.0-37649017007,Canada,emt.inrs.ca,INRS Energie Mat & Telecommun,"INRS Energie Mat & Telecommun, Canada","Charreteur, Fanny; Jaouen, Frederic; Ruggeri, Stephane; Dodelet, Jean-Pol"
"Liu, G.C.K., Dahn, J.R.",Fe-N-C oxygen reduction catalysts supported on vertically aligned carbon nanotubes,2008,Applied Catalysis A: General,347,1,,43,49,,52,10.1016/j.apcata.2008.05.035,https://www.scopus.com/inward/record.uri?eid=2-s2.0-48049112026&doi=10.1016%2Fj.apcata.2008.05.035&partnerID=40&md5=01f6c53f0e1faa7f6b9de5123ff1d704,"Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS, Canada","Liu, Gary Chih Kang, Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS, Canada; Dahn, Jeff R., Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS, Canada","Non-noble metal electrocatalyst (Fe-N-C) for the oxygen reduction reaction (ORR) was sputter deposited onto films of vertically aligned carbon nanotubes (VACNT) and tested by the rotating ring disk electrode (RRDE) technique. The VACNT support was first synthesized at atmospheric pressure on a SiO<inf>2</inf>/Si wafer substrate in a simple tube furnace by iron-catalyzed chemical vapor deposition of ethylene and ammonia at a temperature of 720 °C. VACNT films, with CNT bundle height of 1.5 μm and CNT diameter of 50 nm, were loaded into a sputtering machine to deposit Fe-N-C materials onto the VACNT as support. Iron and carbon were sputtered in a nitrogen atmosphere in order to deposit an amorphous mixture of Fe-N-C material on the VACNT films. The Fe-N-C material supported on the VACNT films was then annealed in Ar at 800 °C to make the ORR electrocatalyst. The catalyst-coated VACNT was scraped off the SiO<inf>2</inf>/Si substrate and made into catalyst ink for testing by the RRDE technique. The impact of catalyst loading on the RRDE performance (disk current density and %H<inf>2</inf>O<inf>2</inf>) is discussed. © 2008 Elsevier B.V. All rights reserved.",Catalyst support; Electrocatalyst; Oxygen reduction reaction (ORR); Proton exchange membrane fuel cell (PEMFC); Rotating ring disk electrode (RRDE) technique; Vertically aligned carbon nanotubes (VACNT),Atmospheric pressure; Atmospherics; Carbon films; Catalysis; Electrocatalysts; Electrolytic reduction; Iron; Metallizing; Metals; Nanocomposites; Nanopores; Nanostructured materials; Nanostructures; Nanotechnology; Nanotubes; Oxygen; Precious metals; Pressure; Silicon compounds; Sputtering; electro catalysts; Noble metals; Oxygen reduction catalysts; Oxygen reduction reaction (ORR); Rotating ring-disk electrode (RRDE) technique; Vertically aligned carbon nanotubes (VACNF); Carbon nanotubes,Catalyst support;Electrocatalyst;Oxygen reduction reaction (ORR);Proton exchange membrane fuel cell (PEMFC);Rotating ring disk electrode (RRDE) technique;Vertically aligned carbon nanotubes (VACNT);Atmospheric pressure;Atmospherics;Carbon films;Catalysis;Electrocatalysts;Electrolytic reduction;Iron;Metallizing;Metals;Nanocomposites;Nanopores;Nanostructured materials;Nanostructures;Nanotechnology;Nanotubes;Oxygen;Precious metals;Pressure;Silicon compounds;Sputtering;electro catalysts;Noble metals;Oxygen reduction catalysts;Rotating ring-disk electrode (RRDE) technique;Vertically aligned carbon nanotubes (VACNF);Carbon nanotubes,"J.R. Dahn; Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS B3H 3J5, Canada; email: Jeff.Dahn@Dal.Ca",,,,,,,0926860X,,ACAGE,,English,Appl Catal A Gen,Article,Scopus,,2-s2.0-48049112026,,Canada,Dal.Ca,,,"Liu, G.C.-K.; Dahn, J.R."
"Barrio, J., Pedersen, A., Sarma, S.C., Bagger, A., Gong, M., Favero, S., Zhao, C.X., Garcia-Serres, R., Li, A.Y., Zhang, Q., Jaouen, F., Maillard, F., Kucernak, A., Stephens, I.E.L., Titirici, M.M.",FeNC Oxygen Reduction Electrocatalyst with High Utilization Penta-Coordinated Sites,2023,Advanced Materials,35,14,2211022,,,,106,10.1002/adma.202211022,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85148626296&doi=10.1002%2Fadma.202211022&partnerID=40&md5=2003355ef99eadb9369f46a59b6125cd,"Department of Materials, Imperial College London, London, United Kingdom; Department of Chemical Engineering, Imperial College London, London, United Kingdom; Department of Chemistry, Imperial College London, London, United Kingdom; Department of Chemical Engineering, Tsinghua University, Beijing, China; Chemistry and Biology of Metals, Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Institute of Molecular Chemistry and Materials, Université de Montpellier, Montpellier, Occitanie, France; Université Savoie Mont Blanc, Chambery, Auvergne-Rhone-Alpes, France; Tohoku University, Sendai, Miyagi, Japan","Barrio, Jesús, Department of Materials, Imperial College London, London, United Kingdom, Department of Chemical Engineering, Imperial College London, London, United Kingdom; Pedersen, Angus, Department of Materials, Imperial College London, London, United Kingdom, Department of Chemical Engineering, Imperial College London, London, United Kingdom; Sarma, Saurav Ch, Department of Chemical Engineering, Imperial College London, London, United Kingdom; Bagger, Alexander, Department of Chemical Engineering, Imperial College London, London, United Kingdom; Gong, Mengjun, Department of Chemistry, Imperial College London, London, United Kingdom; Favero, Silvia, Department of Chemical Engineering, Imperial College London, London, United Kingdom; Zhao, Changxin, Department of Chemical Engineering, Tsinghua University, Beijing, China; García-Serres, Ricardo, Chemistry and Biology of Metals, Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Li, Alain You, Department of Chemical Engineering, Imperial College London, London, United Kingdom; Zhang, Qiang, Department of Chemical Engineering, Tsinghua University, Beijing, China; Jaouen, Frédéric, Institute of Molecular Chemistry and Materials, Université de Montpellier, Montpellier, Occitanie, France; Maillard, Frédéric M., Université Savoie Mont Blanc, Chambery, Auvergne-Rhone-Alpes, France; Kucernak, A. R.J., Department of Chemistry, Imperial College London, London, United Kingdom; Stephens, Ifan E.L., Department of Materials, Imperial College London, London, United Kingdom; Titirici, Maria Magdalena, Department of Chemical Engineering, Imperial College London, London, United Kingdom, Tohoku University, Sendai, Miyagi, Japan","Atomic Fe in N-doped carbon (FeNC) electrocatalysts for oxygen (O<inf>2</inf>) reduction at the cathode of proton exchange membrane fuel cells are the most promising alternative to platinum-group-metal catalysts. Despite recent progress on atomic FeNC O<inf>2</inf> reduction, their controlled synthesis and stability for practical applications remain challenging. A two-step synthesis approach has recently led to significant advances in terms of Fe-loading and mass activity; however, the Fe utilization remains low owing to the difficulty of building scaffolds with sufficient porosity that electrochemically exposes the active sites. Herein, this issue is addressed by coordinating Fe in a highly porous nitrogen-doped carbon support (≈3295 m2 g−1), prepared by pyrolysis of inexpensive 2,4,6-triaminopyrimidine and a Mg2+ salt active site template and porogen. Upon Fe coordination, a high electrochemical active site density of 2.54 × 1019 sites g<inf>FeNC</inf>−1 and a record 52% FeN<inf>x</inf> electrochemical utilization based on in situ nitrite stripping are achieved. The Fe single atoms are characterized pre- and post-electrochemical accelerated stress testing by aberration-corrected high-angle annular dark field scanning transmission electron microscopy, showing no Fe clustering. Moreover, ex situ X-ray absorption spectroscopy and low-temperature Mössbauer spectroscopy suggest the presence of penta-coordinated Fe sites, which are further studied by density functional theory calculations. © 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH.",carbon materials; electrocatalysis; FeNC materials; oxygen reduction reaction; single atom catalysts,Atoms; Carbon; Coordination reactions; Density functional theory; Doping (additives); Electrocatalysis; Electrolytic reduction; High resolution transmission electron microscopy; Iron; Oxygen; Proton exchange membrane fuel cells (PEMFC); Scanning electron microscopy; Temperature; X ray absorption spectroscopy; Carbon material; Doped carbons; Electrochemicals; Fe in N-doped carbon material; N-doped; Oxygen reduction reaction; Single atom catalyst; Single-atoms; ]+ catalyst; Electrocatalysts,carbon materials;electrocatalysis;FeNC materials;oxygen reduction reaction;single atom catalysts;Atoms;Carbon;Coordination reactions;Density functional theory;Doping (additives);Electrolytic reduction;High resolution transmission electron microscopy;Iron;Oxygen;Proton exchange membrane fuel cells (PEMFC);Scanning electron microscopy;Temperature;X ray absorption spectroscopy;Carbon material;Doped carbons;Electrochemicals;Fe in N-doped carbon material;N-doped;Single atom catalyst;Single-atoms;]+ catalyst;Electrocatalysts,"M.-M. Titirici; Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom; email: m.titirici@imperial.ac.uk",,,,,,John Wiley and Sons Inc,09359648,,ADVME,,English,Adv Mater,Article,Scopus,,2-s2.0-85148626296,,United Kingdom;China;France;Japan,imperial.ac.uk,,,"Barrio, J.; Pedersen, A.; Sarma, S.C.; Bagger, A.; Gong, M.; Favero, S.; Zhao, C.-X.; Garcia-Serres, R.; Li, A.Y.; Zhang, Q.; Jaouen, F.; Maillard, F.; Kucernak, A.; Stephens, I.E.L.; Titirici, M.-M."
"Yu, C., Liang, L., Mu, Z., Yin, S., Liu, Y., Chen, S.",FeNC shell-stabilized L10-PtFe intermetallic nanoparticles for high-performance oxygen reduction,2025,Chinese Journal of Catalysis,75,,,125,136,,0,10.1016/S1872-2067(25)64661-4,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105012368354&doi=10.1016%2FS1872-2067%2825%2964661-4&partnerID=40&md5=046fa89f128fbb9b45776c65b83ba751,"College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, China","Yu, Chengwen, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, China; Liang, Lecheng, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, China; Mu, Zhangyan, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, China; Yin, Shaoqi, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, China; Liu, Yuwen, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, China; Chen, Shengli, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, China","In the pursuit of high-performance proton exchange membrane fuel cells (PEMFCs), obtaining durable Pt-based intermetallic catalysts with small particle sizes for oxygen reduction reaction (ORR) stands as a crucial yet challenging topic. Herein, we propose an idea of catalyst design utilizing Fe-phenanthroline (Phen) complex as precursor to integrate metal-nitrogen-carbon (M-N-C) with the strong anchoring effect into carbon shells, synthesizing highly ordered and small-sized (3.59 nm) PtFe intermetallic catalyst coated with iron-nitrogen-carbon (FeNC) shells (L1<inf>0</inf>-PtFe@FeNC). The strong Fe-Phen interaction ensures the uniform dispersion of Fe species on Pt seeds so as to form protective shells suppressing the agglomeration and dissolution of PtFe nanoparticles (NPs) under the high-temperature annealing or harsh operational conditions. It exhibits excellent mass activity (MA) that is about five-fold increase compared to the commercial Pt/C, as well as the significantly improved MA retention after 30,000 potential cycles (68.2% vs. 45.3%). Nitrogen-doped carbon (NC) shells and pure carbon (C) shells are used as comparison to demonstrate the advantages of FeNC shells. Durability test results show that NC and C shells obviously degrade after potential cycles, while well-preserved FeNC shells guarantee catalyst stability. Theoretical calculations reveal that the strong binding between FeNC shells and the Pt surface enhances the stability of both the nanoparticles and the FeNC shells. © 2025 Dalian Institute of Chemical Physics, the Chinese Academy of Sciences",Durability; Intermetallic PtFe; Iron-nitrogen-carbon; Oxygen reduction reaction; Surface coating,Binary alloys; Carbon; Catalysts; Iron; Iron alloys; Iron compounds; Nanoparticles; Nitrogen; Oxygen; Oxygen reduction reaction; Platinum; Platinum alloys; Shells (structures); Surface reactions; Carbon shells; Intermetallic ptfe; Iron nitrogen; Iron-nitrogen-carbon; Mass activity; Nitrogen-carbon; Performance; Surface coatings; ]+ catalyst; Durability; Electrolytic reduction; Intermetallics; Proton exchange membrane fuel cells (PEMFC),Durability;Intermetallic PtFe;Iron-nitrogen-carbon;Oxygen reduction reaction;Surface coating;Binary alloys;Carbon;Catalysts;Iron;Iron alloys;Iron compounds;Nanoparticles;Nitrogen;Oxygen;Platinum;Platinum alloys;Shells (structures);Surface reactions;Carbon shells;Iron nitrogen;Mass activity;Nitrogen-carbon;Performance;Surface coatings;]+ catalyst;Electrolytic reduction;Intermetallics;Proton exchange membrane fuel cells (PEMFC),"Y. Liu; Hubei Key Laboratory of Electrochemical Power Sources, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, 430072, China; email: ywliu@whu.edu.cn",,,,,,Science Press,18722067,,CJCHC,,English,Chin. J. Catal.,Article,Scopus,,2-s2.0-105012368354,,China,whu.edu.cn,,,"Yu, C.; Liang, L.; Mu, Z.; Yin, S.; Liu, Y.; Chen, S."
"Wu, X.Q., Sun, Z., Li, H., Guo, X.L., Huang, Z.F., Gao, R.J., Shi, C.X., Zhang, X.W., Pan, L., Zou, J.J.",Fe-N-C Support-Enhanced Pt Catalyst for High-Performance Oxygen Reduction,2025,CHEMCATCHEM,,,,,,8,0,10.1002/cctc.202501198,,"[Wu, Xinquan; Sun, Zhen; Li, Hao; Guo, Xiaolei; Huang, Zhen-Feng; Gao, Ruijie; Shi, Chengxiang; Zhang, Xiangwen; Pan, Lun; Zou, Ji-Jun] Tianjin Univ, Sch Chem Engn & Technol,Inst Mol Plus, Minist Educ,Key Lab Green Chem Technol, Natl Ind Educ Platform Energy Storage, Tianjin 300072, Peoples R China; [Wu, Xinquan; Sun, Zhen; Li, Hao; Guo, Xiaolei; Huang, Zhen-Feng; Gao, Ruijie; Shi, Chengxiang; Zhang, Xiangwen; Pan, Lun; Zou, Ji-Jun] Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China",,"Platinum-based catalysts are highly effective for the oxygen reduction reaction (ORR), but their prohibitive cost and insufficient activity impede large-scale commercialization. Herein, we report a Pt@Fe-NC electrocatalyst synthesized by depositing uniform platinum nanoparticles onto an iron-nitrogen-carbon (Fe-NC) support via an ethylene glycol reduction method. The Fe-NC support, prepared from an iron (II)-1,10-phenanthroline complex precursor to ensure high iron utilization, modulates the electronic structure of the Pt nanoparticles, thereby enhancing both catalytic activity and stability. The optimized Pt@Fe-NC catalyst (13.54 wt% Pt) exhibits exceptional ORR performance in acidic media, with a half-wave potential of 0.852 V and notable stability. When integrated into a zinc-air battery, the catalyst delivered a high specific capacity of 652.66 mAh gZn -1. Furthermore, a proton exchange membrane fuel cell (PEMFC) employing this catalyst achieved a high open-circuit voltage (OCV) of 0.964 V and a peak power density of 1.722 W cm-2, outperforming most previously reported Pt-based catalysts. This study highlights a synergistic strategy between Pt nanoparticles and metal-nitrogen-carbon (M-N-C) supports to boost ORR performance, presenting a viable path toward advanced, cost-effective catalysts for energy conversion devices like PEMFCs and zinc-air batteries.",Metal nitrogen carbon (M-N-C); Oxygen reduction reaction (ORR); Proton exchange membrane fuel cell (PEMFC); Pt-based catalyst; Zinc-air battery,NANOPARTICLES; PLATINUM; DURABILITY; CHALLENGES,Metal nitrogen carbon (M-N-C);Oxygen reduction reaction (ORR);Proton exchange membrane fuel cell (PEMFC);Pt-based catalyst;Zinc-air battery;NANOPARTICLES;PLATINUM;DURABILITY;CHALLENGES,zfhuang@tju.edu.cn; panlun76@tju.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1867-3880,,,,English,CHEMCATCHEM,Article; Early Access,WoS,Chemistry,WOS:001617980400001,2-s2.0-105022438880,China,tju.edu.cn,Tianjin Univ;Collaborat Innovat Ctr Chem Sci & Engn Tianjin,"Tianjin Univ, China;Collaborat Innovat Ctr Chem Sci & Engn Tianjin, China","Wu, Xinquan; Sun, Zhen; Li, Hao; Guo, Xiaolei; Huang, Zhen-Feng; Gao, Ruijie; Shi, Chengxiang; Zhang, Xiangwen; Pan, Lun; Zou, Ji-Jun"
"Xu, X., Shi, C., Li, Q., Chen, R., Chen, T.",Fe-N-Doped carbon foam nanosheets with embedded Fe2O3 nanoparticles for highly efficient oxygen reduction in both alkaline and acidic media,2017,RSC Advances,7,24,,14382,14388,,44,10.1039/c6ra27826d,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85014872530&doi=10.1039%2Fc6ra27826d&partnerID=40&md5=c739b222dee29210f15d80585a244997,"Institute of New Catalytic Materials Science, Nankai University, Tianjin, China","Xu, Xueyan, Institute of New Catalytic Materials Science, Nankai University, Tianjin, China; Shi, Chengxiang, Institute of New Catalytic Materials Science, Nankai University, Tianjin, China; Li, Qi, Institute of New Catalytic Materials Science, Nankai University, Tianjin, China; Chen, Rui, Institute of New Catalytic Materials Science, Nankai University, Tianjin, China; Chen, Tiehong, Institute of New Catalytic Materials Science, Nankai University, Tianjin, China","We report a facile two-step pyrolysis and acid leaching process to fabricate a high performance oxygen reduction reaction (ORR) electrocatalyst Fe<inf>2</inf>O<inf>3</inf>@Fe-N-C, which is composed of Fe-N-doped carbon foam nanosheets with embedded carbon coated Fe<inf>2</inf>O<inf>3</inf> nanoparticles to enhance the ORR performance in acidic medium. The ORR activities of the Fe<inf>2</inf>O<inf>3</inf>@Fe-N-C electrocatalysts obtained at different pyrolysis temperatures are investigated and the catalyst fabricated by pyrolysis at 800 °C displays the optimal activity. A rotating disk electrode (RDE) study reveals that it exhibits a positive half-wave potential of 0.535 V (vs. Ag/AgCl), high selectivity (4e− process), excellent long-term stability (96.3% of the initial current remaining after 20 000 s of continuous operation) and good tolerance against the methanol-crossover effect in acidic medium, making it a promising candidate for substituting the commercial Pt/C catalyst in polymer electrolyte membrane fuel cells (PEMFCs). The remarkable ORR activity originates from the cooperative effect of carbon coated Fe<inf>2</inf>O<inf>3</inf> nanocrystals and Fe-N-doped carbon foam nanosheets. Moreover, the porous structure, high specific surface area, and electron conductivity could contribute to the enhanced ORR performance. © The Royal Society of Chemistry.",,Catalyst selectivity; Catalysts; Doping (additives); Electrocatalysts; Electrolytes; Electrolytic reduction; Fuel cells; Nanoparticles; Nanosheets; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Pyrolysis; Rotating disks; Continuous operation; Electron conductivity; High specific surface area; Methanol crossover effects; Oxygen reduction reaction; Polymer electrolyte membrane fuel cell (PEMFCs); Pyrolysis temperature; Rotating disk electrodes; Foams,Catalyst selectivity;Catalysts;Doping (additives);Electrocatalysts;Electrolytes;Electrolytic reduction;Fuel cells;Nanoparticles;Nanosheets;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Pyrolysis;Rotating disks;Continuous operation;Electron conductivity;High specific surface area;Methanol crossover effects;Oxygen reduction reaction;Polymer electrolyte membrane fuel cell (PEMFCs);Pyrolysis temperature;Rotating disk electrodes;Foams,"T. Chen; Institute of New Catalytic Materials Science, School of Materials Science and Engineering, Key Laboratory of Advanced Energy Materials Chemistry (MOE), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin, 300350, China; email: chenth@nankai.edu.cn",,,,,,Royal Society of Chemistry,,,RSCAC,,English,RSC Adv.,Article,Scopus,,2-s2.0-85014872530,,China,nankai.edu.cn,,,"Xu, X.; Shi, C.; Li, Q.; Chen, R.; Chen, T."
"Zhang, Y.L., Chen, C., Zou, L., Zou, Z., Yang, H.",Fe-N Doped Hollow Carbon Nanospheres Linked by Carbon Nanotubes for Oxygen Reduction Reaction; Fe-N共掺杂的碳纳米管串联空心球对氧还原反应的电催化,2018,Journal of Electrochemistry,24,6,,726,732,,2,10.13208/j.electrochem.180842,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85148914849&doi=10.13208%2Fj.electrochem.180842&partnerID=40&md5=cd148791f6d9599518b679e51f2eaee9,"Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; University of Chinese Academy of Sciences, Beijing, China","Zhang, Yalin, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China, University of Chinese Academy of Sciences, Beijing, China; Chen, Chi, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; Zou, Liangliang, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; Zou, Zhiqiang, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; Yang, Hui, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China","The development of non-precious metal catalysts for oxygen reduction reaction (ORR) is essential for large-scale application of proton exchange membrane fuel cells.Herein, we present the in situ formed Fe-N doped hollow carbon nanospheres linked by carbon nanotubes composite, synthesized by using ZIF-8 as sacrificed template to form polydopamine (PDA) hollow nanospheres, followed by complexing with FeCl3, high temperature heat-treatment and NH3-etching.ZIF-8 was gradually decomposed simultaneously with PDA coating due to the loss of Zn2+ grabbed by PDA.NH3 etching resulted in the improved surface area, while the reducibility of NH3 resulted in the formation of Fe4N nanoparticles, which benefits the ORR activity of the catalyst.The half-wave potential of the as-prepared of PDA-Fe/N/C-NH3 was 0.79 V, only 60 mV lower than that of commercial Pt/C.The stability and methanol tolerance of PDA-Fe/N/C-NH3 were even superior to that of commercial Pt/C, indicating the good potential of PDA-Fe/N/C-NH3 for the application of fuel cells. © 2018 Journal of Electrochemistry. All rights reserved.",carbon nanotubes/hollow nanospheres composite; NH3-etching; non-precious metal catalyst; oxygen reduction reaction; polydopamine,,carbon nanotubes/hollow nanospheres composite;NH3-etching;non-precious metal catalyst;oxygen reduction reaction;polydopamine,"Z.-Q. Zou; Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, China; email: zouzq@sari.ac.cn; H. Yang; Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, China; email: yangh@sari.ac.cn",,,,,,Chinese Chemical Society,10063471,,,,Chinese,J. Electrochem.,Article,Scopus,,2-s2.0-85148914849,,China,sari.ac.cn,,,"Zhang, Y.-L.; Chen, C.; Zou, L.; Zou, Z.; Yang, H."
"Sirirak, R., Jarulertwathana, B., Laokawee, V., Susingrat, W., Sarakonsri, T.",FeNi alloy supported on nitrogen-doped graphene catalysts by polyol process for oxygen reduction reaction (ORR) in proton exchange membrane fuel cell (PEMFC) cathode,2017,RESEARCH ON CHEMICAL INTERMEDIATES,43,5,,2905,2919,15,28,10.1007/s11164-016-2802-6,,"[Sirirak, Reungruthai; Jarulertwathana, Benjaporn; Laokawee, Viratchara; Susingrat, Warapa] Chiang Mai Univ, Mat Sci Res Ctr, Fac Sci, Chiang Mai 50200, Thailand; [Sirirak, Reungruthai; Sarakonsri, Thapanee] Chiang Mai Univ, Dept Chem, Ctr Excellence Innovat Chem PERCH CIC, Fac Sci, Chiang Mai 50200, Thailand",,"A non-precious metal FeNi electrocatalyst (FeNi/NG) was prepared by a simple solution route called the polyol process for use as the oxygen reduction reaction (ORR) catalyst in polymer exchange membrane fuel cells. The nitrogen-doped graphene (NG) was synthesized from graphite oxide (GO) in a one-pot reactor via thermal annealing of GO-mixed melamine. The obtained NG presents high content of pyridinic-N and quaternary-N types with acceptable activity of ORR in acidic media by XPS and cyclic voltammetry techniques, respectively. The non-precious FeNi alloy nanoparticles (spherical-like nanoparticles mixed with hexagonal plate-like features) were successfully synthesized and well dispersed on the prepared NG by the polyol process confirmed by SEM-BSE and TEM analysis. The XRD and SAED results found FeNi and the carbon phase in the prepared catalysts. Finally, the CV technique shows that the peak potential of FeNi/NG is in the range of 0.12-0.34 V, which is close to that of the commercial Pt/C catalyst (0.35 V). To summarize, the obtained catalyst (FeNi/NG) revealed reliable electrocatalytic properties for ORR in a proton exchange membrane fuel cell cathode.",Non-precious metal catalyst; PEMFC; Oxygen reduction reaction; Nitrogen-doped graphene,,Non-precious metal catalyst;PEMFC;Oxygen reduction reaction;Nitrogen-doped graphene,reungruthai@gmail.com,,"VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS",,,,SPRINGER,0922-6168,,,,English,RES CHEM INTERMEDIAT,Article,WoS,Chemistry,WOS:000399256100014,2-s2.0-84994759840,Thailand,gmail.com,Chiang Mai Univ,"Chiang Mai Univ, Thailand","Sirirak, Reungruthai; Jarulertwathana, Benjaporn; Laokawee, Viratchara; Susingrat, Warapa; Sarakonsri, Thapanee"
"Byon, H.R., Suntivich, J., Crumlin, E.J., Shao-Horn, Y.",Fe-N-modified multi-walled carbon nanotubes for oxygen reduction reaction in acid,2011,PHYSICAL CHEMISTRY CHEMICAL PHYSICS,13,48,,21437,21445,9,76,10.1039/c1cp23029h,,"[Byon, Hye Ryung; Crumlin, Ethan J.; Shao-Horn, Yang] MIT, Dept Mech Engn, Cambridge, MA 02139 USA; [Byon, Hye Ryung; Suntivich, Jin; Shao-Horn, Yang] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA; [Byon, Hye Ryung; Suntivich, Jin; Crumlin, Ethan J.; Shao-Horn, Yang] MIT, Electrochem Energy Lab, Cambridge, MA 02139 USA",,"We report a facile synthesis of Fe-N-C catalysts based on the surface functionalization of multi-walled carbon nanotubes (MWCNTs), which show high activity and stability for oxygen reduction reaction (ORR) in acid. Fe-N-MWCNT catalysts, whose ORR mass activities could vary by 3-4 times depending on the choice of Fe precursors, were found to have considerably higher ORR mass activity and higher stability than N-modified MWCNTs (N-MWCNTs). The Fe-N-MWCNT catalyst with a dominant Fe-N-x moiety (with x approximate to 4) and a surface Fe/C ratio of similar to 0.004 exhibits the highest ORR mass activity in acid (similar to 0.7 mA mg(-1) Fe-N-MWCNT at 0.8 V vs. RHE), where the lower mass activity of other Fe-N-MWCNT catalysts can be attributed to lower Fe/C ratios and Fe-N-x moieties (with x smaller than 4) as revealed from X-ray photoelectron spectroscopy (XPS) and extended X-ray absorption fine structure (EXAFS) spectroscopy. Moreover, the enhanced stability of Fe-N-MWCNTs in comparison to N-MWCNTs can be attributed to less H2O2 production during ORR as determined from rotating ring disk electrode (RRDE) measurements, and higher activity for H2O2 electro-reduction by rotating disk electrode (RDE) measurements. The large surface Fe/C ratio and Fe-N-x moiety corresponding to high ORR activity and stability of Fe-N-MWCNTs demonstrate that surface functionalization can be very helpful to graft active catalytic sites onto carbon nanostructures, and to provide insights into the ORR mechanism of non-noble metal catalysts (NNMCs) for proton exchange membrane fuel cells (PEMFCs).",,PEM FUEL-CELLS; HIGH ELECTROCATALYTIC ACTIVITY; ACTIVE-SITES; O-2 REDUCTION; METAL ELECTROCATALYSTS; HEAT-TREATMENT; CATALYSTS; ELECTROLYTE; NITROGEN; IRON,PEM FUEL-CELLS;HIGH ELECTROCATALYTIC ACTIVITY;ACTIVE-SITES;O-2 REDUCTION;METAL ELECTROCATALYSTS;HEAT-TREATMENT;CATALYSTS;ELECTROLYTE;NITROGEN;IRON,shaohorn@mit.edu,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,1463-9076,,,22045408,English,PHYS CHEM CHEM PHYS,Article,WoS,Chemistry; Physics,WOS:000297560200030,2-s2.0-82655180413,United States,mit.edu,MIT,"MIT, United States","Byon, Hye Ryung; Suntivich, Jin; Crumlin, Ethan J.; Shao-Horn, Yang"
"Chen, C., Zhou, Z.Y., Wang, Y.C., Zhang, X., Yang, X.D., Zhang, X.S., Sun, S.G.","Fe, N, S-doped porous carbon as oxygen reduction reaction catalyst in acidic medium with high activity and durability synthesized using CaCl2 as template",2017,CHINESE JOURNAL OF CATALYSIS,38,4,,673,682,10,22,10.1016/S1872-2067(17)62807-9,,"[Chen, Chi; Zhang, Xinsheng; Sun, Shigang] East China Univ Sci & Technol, Coll Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China; [Chen, Chi; Zhou, Zhiyou; Wang, Yucheng; Zhang, Xue; Yang, Xiaodong; Sun, Shigang] Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Collaborat Innovat Ctr Chem Energy Mat, Coll Chem & Chem Engn, Xiamen 361005, Fujian, Peoples R China",,"Proton exchange membrane fuel cells suffer from the sluggish kinetics of the oxygen reduction reaction (ORR) and the high cost of Pt catalysts. In the present work, a high-performance ORR catalyst based on Fe, N, S-doped porous carbon (FeNS-PC) was synthesized using melamine formaldehyde resin as C and N precursors, Fe(SCN)(3) as Fe and S precursors, and CaCl2 as a template via a two-step heat treatment without a harsh template removal step. The results show that the catalyst treated at 900 degrees C (FeNS-PC-900) had a high surface area of 775 m(2)/g, a high mass activity of 10.2 A/g in an acidic medium, and excellent durability; the half-wave potential decreased by only 20 mV after 10000 potential cycles. The FeNS-PC-900 catalyst was used as the cathode in a proton exchange membrane fuel cell and delivered a peak power density of 0.49 W/cm(2). FeNS-PC-900 therefore has good potential for use in practical applications. (C) 2017, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.","Non-precious metal catalyst; Oxygen reduction reaction; Proton exchange membrane fuel cell; Fe, N, S-doped porous carbon; Melamine formaldehyde resin",MEMBRANE FUEL-CELLS; HIGH-PERFORMANCE ELECTROCATALYSTS; FE/N/C ORR CATALYST; POWER-DENSITY; POLYMER; IRON; NITROGEN; POLYANILINE; SHAPE,"Non-precious metal catalyst;Oxygen reduction reaction;Proton exchange membrane fuel cell;Fe, N, S-doped porous carbon;Melamine formaldehyde resin;MEMBRANE FUEL-CELLS;HIGH-PERFORMANCE ELECTROCATALYSTS;FE/N/C ORR CATALYST;POWER-DENSITY;POLYMER;IRON;NITROGEN;POLYANILINE;SHAPE",xszhang@ecust.edu.cn; sgsun@xmu.edu.cn,,"16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA",,,,SCIENCE PRESS,0253-9837,,,,English,CHINESE J CATAL,Article,WoS,Chemistry; Engineering,WOS:000400419900007,2-s2.0-85017624459,China,ecust.edu.cn,East China Univ Sci & Technol;Xiamen Univ,"East China Univ Sci & Technol, China;Xiamen Univ, China","Chen, Chi; Zhou, Zhiyou; Wang, Yucheng; Zhang, Xue; Yang, Xiaodong; Zhang, Xinsheng; Sun, Shigang"
"Negro, E., Videla, A.H.A.M., Baglio, V., Arico, A.S., Specchia, S., Koper, G.J.M.",Fe-N supported on graphitic carbon nano-networks grown from cobalt as oxygen reduction catalysts for low-temperature fuel cells,2015,APPLIED CATALYSIS B-ENVIRONMENTAL,166,,,75,83,9,74,10.1016/j.apcatb.2014.10.074,,"[Negro, Emanuela; Koper, Ger J. M.] Delft Univ Technol, Dept Chem Engn, NL-2628 BL Delft, Netherlands; [Videla, Alessandro H. A. Monteverde; Specchia, Stefania] Politecn Torino, Dept Appl Sci & Technol, I-10129 Turin, Italy; [Baglio, Vincenzo; Arico, Antonino S.] Ist Tecnol Avanzate Energia Nicola Giordano, Consiglio Nazl Ric, I-98126 Messina, Italy",,"Three iron-nitrogen-containing non-noble metal electrocatalysts supported on networked graphitic structures, carbon nano-networks (CNNs), were synthesized using a wet-impregnation method. The CNN supports were produced in-house by chemical vapor deposition of ethene over cobalt nanoparticles that were previously synthesized in bicontinuous microemulsions. The three CNN supports differed in cobalt content, ranging from 0.1 to 1.7% in weight. These CNN supports were used to prepare Fe-N/CNN electrocatalysts. The oxygen reduction reaction (ORR) activity was evaluated by rotating disk electrode measurements. Interestingly, the highest ORR activity belonged to the catalyst with the highest iron and cobalt content. The most promising catalyst was investigated as the cathode material in a polymer electrolyte membrane fuel cell (PEMFC) and a direct methanol fuel cell (DMFC). The maximum recorded power densities were 121 mW cm(-2) for PEMFC and 15 mW cm(-2) for DMFC, respectively. These values are superior or comparable to the best state of the art for similar materials. The durability to potential cycling was tested in half-cell studies and an activity loss around 10% was found after 1000 cycles, which is not significantly different from what is reported in the literature. The relatively simple synthesis approach and the cheap precursor materials make this electrocatalyst promising for low-temperature fuel cell applications. (C) 2014 Elsevier B.V. All rights reserved.",Iron-nitrogen electrocatalyst; Carbon nano-networks; PEM fuel cells; Direct methanol fuel cells; Oxygen reduction reaction,REDUCED GRAPHENE OXIDE; O-2 REDUCTION; CATHODE CATALYSTS; METAL-CATALYSTS; HEAT-TREATMENT; DOPED CARBON; HIGH-YIELD; ELECTROCATALYTIC ACTIVITY; X ELECTROCATALYSTS; FE/N/C CATALYSTS,Iron-nitrogen electrocatalyst;Carbon nano-networks;PEM fuel cells;Direct methanol fuel cells;Oxygen reduction reaction;REDUCED GRAPHENE OXIDE;O-2 REDUCTION;CATHODE CATALYSTS;METAL-CATALYSTS;HEAT-TREATMENT;DOPED CARBON;HIGH-YIELD;ELECTROCATALYTIC ACTIVITY;X ELECTROCATALYSTS;FE/N/C CATALYSTS,e.negro@tudelft.nl; stefania.specchia@polito.it,,"PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS",,,,ELSEVIER SCIENCE BV,0926-3373,,,,English,APPL CATAL B-ENVIRON,Article,WoS,Chemistry; Engineering,WOS:000348753400010,,Netherlands;Italy,tudelft.nl,Delft Univ Technol;Politecn Torino;Ist Tecnol Avanzate Energia Nicola Giordano,"Delft Univ Technol, Netherlands;Politecn Torino, Italy;Ist Tecnol Avanzate Energia Nicola Giordano, Italy","Negro, Emanuela; Videla, Alessandro H. A. Monteverde; Baglio, Vincenzo; Arico, Antonino S.; Specchia, Stefania; Koper, Ger J. M."
"Wang, Y.Z., Huang, W.Y., Hsieh, T.H., Jheng, L.C., Ho, K.S., Huang, S.W., Chao, L.",FeNxC based catalysts prepared by the calcination of iron-ethylenediamine@polyaniline as the cathode-catalyst of proton exchange membrane fuel cell,2019,Polymers,11,8,1368,,,,14,10.3390/polym11081368,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85071166279&doi=10.3390%2Fpolym11081368&partnerID=40&md5=40f78f4eb5eae489d4ee6ddc59bda735,"Department of Chemical and Materials Engineering, National Yunlin University of Science and Technology, Douliou, Yunlin, Taiwan; Department of Photonics, National Sun Yat-Sen University, Kaohsiung, Taiwan; Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan; Center for General Education, Taipei City University of Science and Technology, Taipei, Taiwan","Wang, Yenzen Zen, Department of Chemical and Materials Engineering, National Yunlin University of Science and Technology, Douliou, Yunlin, Taiwan; Huang, Wenyao, Department of Photonics, National Sun Yat-Sen University, Kaohsiung, Taiwan; Hsieh, Tar Hwa, Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan; Jheng, Li Cheng, Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan; Ho, Kaoshan, Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan; Huang, Sinwei, Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan; Chao, Liang, Center for General Education, Taipei City University of Science and Technology, Taipei, Taiwan","Calcinated tris(ethylenediamine)iron(III) chloride was used as a non-precious metal catalyst (NPMCs) for a proton exchanged membrane fuel cell (PEMFC) under the protection of polyaniline (PANI), which behaves as both nitrogen source and carbon supporter. The optimal ratio of FeCl<inf>3</inf>/EDA was found to be close to 1/3 under the consideration of the electrocatalytic performance, such as better oxygen reduction reaction (ORR) and higher power density. Two-stage calcination, one at 900 °C in N<inf>2</inf> and the other at 800 °C in mixed gases of N<inf>2</inf> and NH<inf>3</inf>, result in an FeNxC catalyst (FeNC-900-800-A) with pretty high specific surface area of 1098 m2·g-1 covered with both microand mesopores. The ORR active sites focused mainly on Fe-Nx bonding made of various pyridinic, pyrrolic, and graphitic N-s after calcination. The max. power density reaches 140 mW·cm-2 for FeNC-900-800-A, which is superior to other FeNxC catalysts, experiencing only one-stage calcination in N<inf>2</inf>. The FeNxC demonstrates only 10 mV half-wave-voltage (HWV) loss at 1600 rpm after 1000 redox cycles, as compared to be 27 mV for commercial Pt/C catalyst in the durability test. © 2019 by the author.",Ethylene diamine; FeNxC catalyst; Polyaniline; Two-stage calcination,Amines; Ammonia; Calcination; Catalysts; Chlorine compounds; Durability; Electrolytic reduction; Ethylene; Polyaniline; Proton exchange membrane fuel cells (PEMFC); Electrocatalytic performance; Ethylene diamine; Half-wave voltage; High specific surface area; Membrane fuel cells; Non-precious metal catalysts; Oxygen reduction reaction; Polyanilines (PAni); Iron compounds,Ethylene diamine;FeNxC catalyst;Polyaniline;Two-stage calcination;Amines;Ammonia;Calcination;Catalysts;Chlorine compounds;Durability;Electrolytic reduction;Ethylene;Proton exchange membrane fuel cells (PEMFC);Electrocatalytic performance;Half-wave voltage;High specific surface area;Membrane fuel cells;Non-precious metal catalysts;Oxygen reduction reaction;Polyanilines (PAni);Iron compounds,"W.-Y. Huang; Department of Photonics, National Sun Yat-sen University, Kaohsiung, 70 Lienhai Rd., 80424, Taiwan; email: wyhuang@faculty.nsysu.edu.tw",,,,,,MDPI AG indexing@mdpi.com Postfach Basel CH-4005,,,,,English,Polym.,Article,Scopus,,2-s2.0-85071166279,,Taiwan,faculty.nsysu.edu.tw,,,"Wang, Y.-Z.; Huang, W.-Y.; Hsieh, T.-H.; Jheng, L.-C.; Ho, K.-S.; Huang, S.-W.; Chao, L."
"Velazquez-Palenzuela, A., Zhang, L., Wang, L.C., Cabot, P.L., Brillas, E., Tsay, K., Zhang, J.J.","Fe-Nx/C electrocatalysts synthesized by pyrolysis of Fe(II)-2,3,5,6-tetra(2-pyridyl)pyrazine complex for PEM fuel cell oxygen reduction reaction",2011,ELECTROCHIMICA ACTA,56,13,,4744,4752,9,52,10.1016/j.electacta.2011.03.059,,"[Velazquez-Palenzuela, Amado; Zhang, Lei; Wang, Liucheng; Tsay, Ken; Zhang, Jiujun] Natl Res Council Canada, Inst Fuel Cell Innovat, Vancouver, BC V6T 1W5, Canada; [Velazquez-Palenzuela, Amado; Lluis Cabot, Pere; Brillas, Enric] Univ Barcelona, Dept Quim Fis, Lab Electroquim Dels Mat & Medi Ambient, E-08028 Barcelona, Spain; [Wang, Liucheng] Zhengzhou Univ, Chem Engn Coll, Zhengzhou 450001, Henan, Peoples R China",,"2,3,5,6-Tetra(2-pyridyl)pyrazine (TPPZ) was employed as a ligand to prepare an iron(II) complex (Fe-TPPZ) that served as a precursor to synthesize carbon-supported catalysts (Fe-N-x/C) through heattreatment at 600, 700, 800 and 900 degrees C under N-2 atmosphere. Both the structure and composition of the synthesized Fe-N-x/C were analyzed by X-ray diffraction and energy-dispersive X-ray microanalysis, respectively. The rotating disk and ring-disk electrode measurements showed that these catalysts have strong ORR activity with an overall 4-electron transfer process through a (2 + 2)-electron transfer mechanism, which was assigned to the catalytic function of the Fe-N-x center. A study on the heat-treatment temperature on the ORR activity showed that 800 degrees C is the optimal temperature for the synthesized catalysts. Furthermore, the effect of both catalyst and Nafion (R) ionomer loadings in the catalyst layer on the corresponding ORR activity was also investigated. The kinetic parameters such as the chemical reaction rate between O-2 and Fe-N-x/C (adduct formation reaction), the rate constant for the rate-determining step (RDS), and the electron numbers in the ORR, were obtained. The methanol tolerance of the catalyst was also tested. To validate the ORR activity, a membrane electrode assembly in which the cathode catalyst layer contained Fe-N-x/C was constructed and tested in a real fuel cell. The results obtained are encouraging when compared with similar non-noble catalysts. (C) 2011 Published by Elsevier Ltd.","Carbon-supported non-noble metal electrocatalysts; Oxygen reduction reaction; Iron-nitrogen complex; 2,3,5,6-Tetra(2-pyridyl)pyrazine (TPPZ); Kinetic parameters; PEM fuel cells; Methanol tolerance",HIGH-AREA CARBON; IRON PHTHALOCYANINES; ACID-MEDIUM; CATALYSTS; ELECTRODES; FE/N/C; PERFORMANCE; PARAMETERS; 2-ELECTRON; CATHODES,"Carbon-supported non-noble metal electrocatalysts;Oxygen reduction reaction;Iron-nitrogen complex;2,3,5,6-Tetra(2-pyridyl)pyrazine (TPPZ);Kinetic parameters;PEM fuel cells;Methanol tolerance;HIGH-AREA CARBON;IRON PHTHALOCYANINES;ACID-MEDIUM;CATALYSTS;ELECTRODES;FE/N/C;PERFORMANCE;PARAMETERS;2-ELECTRON;CATHODES",lei.zhang@nrc.gc.ca; wanglc@zzu.edu.cn,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000291524000006,,Canada;Spain;China,nrc.gc.ca,Natl Res Council Canada;Univ Barcelona;Zhengzhou Univ,"Natl Res Council Canada, Canada;Univ Barcelona, Spain;Zhengzhou Univ, China","Velazquez-Palenzuela, Amado; Zhang, Lei; Wang, Liucheng; Lluis Cabot, Pere; Brillas, Enric; Tsay, Ken; Zhang, Jiujun"
"Wu, Y.L., Huang, J.L., Lin, Z.P., Li, L.F., Liang, G.F., Jin, Y.Q., Huang, G.J., Zhang, H., Chen, J., Xie, F.Y., Jin, Y.S., Wang, N., Meng, H.",Fe-Nx doped carbon nanotube as a high efficient cathode catalyst for proton exchange membrane fuel cell,2021,CHEMICAL ENGINEERING JOURNAL,423,,130241,,,10,34,10.1016/j.cej.2021.130241,,"[Wu, Yinlong; Huang, Jilin; Lin, Zhipeng; Li, Longfu; Liang, Guofeng; Jin, Yan Qi; Huang, Guoju; Jin, Yanshuo; Wang, Nan; Meng, Hui] Jinan Univ, Guangdong Prov Key Lab Optic Fiber Sensing & Comm, Dept Phys,Guangdong Prov Engn Technol Res Ctr Vac, Siyuan Lab,Guangzhou Key Lab Vacuum Coating Techn, Guangzhou 510632, Guangdong, Peoples R China; [Zhang, Hao; Chen, Jian; Xie, Fangyan] Sun Yat Sen Univ, Instrumental Anal & Res Ctr, Guangzhou 510275, Guangdong, Peoples R China",,"In this work, we report our recent efforts in developing carbon nanotube cross-linking MOF-derived Fe/N/C catalysts as oxygen reduction electrocatalysts for fuel cell. It is witnessed that the carbon nanotube cross-linking strategy can effectively improve the activity and stability of fuel cell, which can be assigned to its fast and convenient electron conduction channels offered by loosely cross-linked carbon nanotubes. The results of 57Fe Mo center dot ssbauer spectroscopy show that there are three spin states of Fe-N4 structure in the material, of which lowspin state D1-FeIIN4 and high-spin state D3-N-FeN4 are both considered to be the main active sites of oxygen reduction reaction. For fuel cell, high performance of 0.732 A cm-2 at 0.7 V is reached. The novel cross-linking catalyst sheds light on the development of non-precious metal catalysts for fuel cells.",Oxygen reduction; Fuel cell; Cross-linking strategy; Metal organic frameworks,OXYGEN REDUCTION REACTION; METAL-ORGANIC FRAMEWORKS; IRON-BASED CATALYSTS; FE/N/C-CATALYSTS; ENERGY-STORAGE; SURFACE-AREA; ACTIVE-SITES; ELECTROCATALYSTS; ORR; IDENTIFICATION,Oxygen reduction;Fuel cell;Cross-linking strategy;Metal organic frameworks;OXYGEN REDUCTION REACTION;METAL-ORGANIC FRAMEWORKS;IRON-BASED CATALYSTS;FE/N/C-CATALYSTS;ENERGY-STORAGE;SURFACE-AREA;ACTIVE-SITES;ELECTROCATALYSTS;ORR;IDENTIFICATION,jinyanshuo@qq.com; nanwang@jnu.edu.cn; tmh@jnu.edu.cn,,"PO BOX 564, 1001 LAUSANNE, SWITZERLAND",,,,ELSEVIER SCIENCE SA,1385-8947,,,,English,CHEM ENG J,Article,WoS,Engineering,WOS:000683027100005,2-s2.0-85105587233,China,qq.com,Jinan Univ;Sun Yat Sen Univ,"Jinan Univ, China;Sun Yat Sen Univ, China","Wu, Yinlong; Huang, Jilin; Lin, Zhipeng; Li, Longfu; Liang, Guofeng; Jin, Yan Qi; Huang, Guoju; Zhang, Hao; Chen, Jian; Xie, Fangyan; Jin, Yanshuo; Wang, Nan; Meng, Hui"
"Singh, K.P., Bae, E.J., Yu, J.S.",Fe-P: A New Class of Electroactive Catalyst for Oxygen Reduction Reaction,2015,JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,137,9,,3165,3168,4,315,10.1021/ja511759u,,"[Singh, Kiran Pal; Bae, Eun Jin; Yu, Jong-Sung] Daegu Gyeongbuk Inst Sci & Technol DGIST, Dept Energy Syst Engn, Daegu 711873, South Korea",,"It has been long thought that Fe-N-C structure, where Fe is bonded with an electronegative heteroatom N, plays a key role as nonprecious Metal Catalyst for oxygen reduction reaction (ORR) in fuel tells. However, eledtrocatalytic activity of Fe bonded with electropositive heteroatom P has never been considered for ORR. Herein We report the electrocatalytic activity for ORR of new Fe-P-C.",,NITROGEN-DOPED CARBON; HIGH ELECTROCATALYTIC ACTIVITY; METAL-FREE ELECTROCATALYSTS; PEM FUEL-CELLS; ELECTROCHEMICAL PERFORMANCE; HYDROGEN EVOLUTION; IRON; GRAPHENE; CO; MORPHOLOGY,NITROGEN-DOPED CARBON;HIGH ELECTROCATALYTIC ACTIVITY;METAL-FREE ELECTROCATALYSTS;PEM FUEL-CELLS;ELECTROCHEMICAL PERFORMANCE;HYDROGEN EVOLUTION;IRON;GRAPHENE;CO;MORPHOLOGY,jsy119@gmail.com,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,0002-7863,,,25714509,English,J AM CHEM SOC,Article,WoS,Chemistry,WOS:000351187200004,,South Korea,gmail.com,Daegu Gyeongbuk Inst Sci & Technol DGIST,"Daegu Gyeongbuk Inst Sci & Technol DGIST, South Korea","Singh, Kiran Pal; Bae, Eun Jin; Yu, Jong-Sung"
"Li, S.L., Yuan, X.X., Kong, H.C., Xu, J., Ma, Z.F.",Fe-PPy-TsOH/C as Cathode Catalyst for Proton Exchange Membrane Fuel Cells,2017,JOURNAL OF INORGANIC MATERIALS,32,4,,393,399,7,3,10.15541/jim20160399,,"[Li Shu-Ling; Yuan Xian-Xia; Kong Hai-Chuan; Xu Jin; Ma Zi-Feng] Shanghai Jiao Tong Univ, Dept Chem Engn, Shanghai 200240, Peoples R China",,"Cathode catalyst is a dominant parameter hindering the development of proton exchange membrane fuel cells (PEMFCs), exploiting non-precious metal based catalysts with low cost and high activity has become an urgent task in recent decades. In this work, a non-precious metal based catalyst of heat-treated nitrogen doped carbon supported transition metal based catalyst (M-N/C catalyst) was chosen as the subject, and a series of Fe-PPy-TsOH/C catalysts were synthesized with iron salt as the metal precursor, BP 2000 carbon black as the carbon source, polypyrrole (PPy) as the nitrogen source, and methyl benzene sulfonic acid (TsOH) as the dopant. The effects of heat-treatment temperature and cobalt-doping on the phase structure, morphologyand catalytic performance towards oxygen reduction reaction (ORR) were comparatively investigated. It shows that 800 degrees C is the optimal heat-treatment temperature to prepare high performance Fe-PPy-TsOH/C catalyst. If the iron in the Fe-PPy-TsOH/C catalyst is replaced by appropriate amount of cobalt, its catalytic performance towards ORR could be further improved, and the best ORR performance could be achieved at a cobalt cotent of 33.33% (Fe:Co=2:1 in ratio) in the range of 0-50at%.",proton exchange membrane fuel cells; oxygen reduction reaction; Fe-PPy-TsO/C catalyst; heat treatment; cobalt doping,OXYGEN REDUCTION REACTION; SUPPORTED COBALT-POLYPYRROLE; CO-PPY/C; ELECTROCATALYSTS; CARBON; IRON; PERFORMANCE; POLYMER; SITES; ACID,proton exchange membrane fuel cells;oxygen reduction reaction;Fe-PPy-TsO/C catalyst;heat treatment;cobalt doping;SUPPORTED COBALT-POLYPYRROLE;CO-PPY/C;ELECTROCATALYSTS;CARBON;IRON;PERFORMANCE;POLYMER;SITES;ACID,l_nicola@163.com; yuanxx@sjtu.edu.cn,,"16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA",,,,SCIENCE PRESS,1000-324X,,,,Chinese,J INORG MATER,Article,WoS,Materials Science,WOS:000400225900009,2-s2.0-85020018574,China,163.com,Shanghai Jiao Tong Univ,"Shanghai Jiao Tong Univ, China",Li Shu-Ling; Yuan Xian-Xia; Kong Hai-Chuan; Xu Jin; Ma Zi-Feng
"Liu, S., Yang, Z., Li, M.L., Liu, L.W., Wang, Y., Lv, W.J., Qin, Z.L., Zhao, X.S., Zhu, P., Wang, G.X.","FeS-decorated hierarchical porous N, S-dual-doped carbon derived from silica-ionogel as an efficient catalyst for oxygen reduction reaction in alkaline media",2018,ELECTROCHIMICA ACTA,265,,,221,231,11,59,10.1016/j.electacta.2018.01.195,,"[Liu, Sa; Yang, Zheng; Li, Mengli; Liu, Liwen; Wang, Yan; Lv, Wenjie; Qin, Zhenglong; Zhu, Ping] Jiangsu Normal Univ, Sch Chem & Mat Sci, Xuzhou 221116, Peoples R China; [Zhao, Xinsheng] Jiangsu Normal Univ, Sch Phys & Elect Engn, Xuzhou 221116, Peoples R China; [Wang, Guoxiang] Dalian Polytech Univ, Sch Light Ind & Chem Engn, Dalian 116034, Peoples R China",,"To improve the catalytic activity towards oxygen reduction reaction (ORR) on the non-precious metal catalyst, developing transition metal and heteroatom doped carbon materials with abundant active sites and nanoporous structure is crucial but challenging. Herein, a novel FeS-decorated three-dimensional hierarchical porous N, S co-doped carbon catalyst is derived from silica based ionogel, of which 1-ethyl-3-methylimidazolium trifluoromethanesulfonate ([EMIm][TfO]) acts as source of N and S, and porous silica framework, in suit originated from silicane by sol-gel process, acts as a template to get a large specific surface area (987.5m(2) g(-1)). The obtained catalyst shows excellent ORR activity in 0.1M KOH (positively shifted half-wave potential of 0.87 V), high selectivity (electron-transfer number of 3.99), remarkable stability (only 3mV negative shift of half-wave potential after 5000 potential cycles) and perfect methanol-tolerance effect. The remarkable electrochemical performance of the obtained catalyst is mainly attributed to the well-controlled hierarchical porous structure and homogeneous distribution of highly active sites (N, S-dual-doped carbon, Fe-Nx and/or FeS). (c) 2018 Elsevier Ltd. All rights reserved.","Oxygen reduction reaction; Electrocatalysts; N, S co-doped; Nanoporous carbon; Silica ionogel",NONPRECIOUS METAL-CATALYSTS; PEM FUEL-CELLS; EVOLUTION REACTIONS; BIFUNCTIONAL ELECTROCATALYST; AIR BATTERIES; NANOTUBES; CO; NANOPARTICLES; GRAPHENE; CATHODE,"Oxygen reduction reaction;Electrocatalysts;N, S co-doped;Nanoporous carbon;Silica ionogel;NONPRECIOUS METAL-CATALYSTS;PEM FUEL-CELLS;EVOLUTION REACTIONS;BIFUNCTIONAL ELECTROCATALYST;AIR BATTERIES;NANOTUBES;CO;NANOPARTICLES;GRAPHENE;CATHODE",liusa@jsnu.edu.cn; xinshengzhao@jsnu.edu.cn,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000425751600026,,China,jsnu.edu.cn,Jiangsu Normal Univ;Dalian Polytech Univ,"Jiangsu Normal Univ, China;Dalian Polytech Univ, China","Liu, Sa; Yang, Zheng; Li, Mengli; Liu, Liwen; Wang, Yan; Lv, Wenjie; Qin, Zhenglong; Zhao, Xinsheng; Zhu, Ping; Wang, Guoxiang"
"Xie, X.Y., Shang, L., Xiong, X.Y., Shi, R., Zhang, T.R.",Fe Single-Atom Catalysts on MOF-5 Derived Carbon for Efficient Oxygen Reduction Reaction in Proton Exchange Membrane Fuel Cells,2022,ADVANCED ENERGY MATERIALS,12,3,2102688,,,8,262,10.1002/aenm.202102688,,"[Xie, Xiaoying; Shang, Lu; Xiong, Xuyang; Shi, Run; Zhang, Tierui] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China; [Zhang, Tierui] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China",,"The development of Fe single-atom catalysts (Fe SACs) with abundant, accessible Fe sites is a key step toward enhancing the efficiency of the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). In this study, Zn4O(1,4-benzenedicarboxylate)(3) (MOF-5), which has a 3D microporous cubic structure, is used as the precursor to prepare highly-porous carbon (denoted as C-MOF-5) with an ultrahigh specific surface area (2751 m(2) g(-1)) and high external surface area (1651 m(2) g(-1)). C-MOF-5 is demonstrated as an effective carbon support to yield Fe SAC-MOF-5 with a large amount of accessible FeNx sites (2.35 wt%). Fe SAC-MOF-5 delivers a half-wave potential of 0.83 V (vs RHE) in a 0.5 m H2SO4 electrolyte, and achieves a peak power density of 0.84 W cm(-2) in a 0.2 MPa H-2-O-2 PEMFC. This excellent performance originates from the ultrahigh specific surface area of C-MOF-5 for the formation of a high density of single Fe atoms, and high external surface area for the increased exposure of active sites. This work may inspire the rational design of metal single-atom catalysts derived from a wider range of MOF precursors with ultrahigh specific area to improve the performance of the oxygen reduction reaction in PEMFCs.",Fe single-atom catalysts; MOF-5; oxygen reduction reaction; PEMFCs; porous carbon,N-DOPED CARBON; METAL-ORGANIC FRAMEWORK; POROUS CARBON; ACTIVE-SITES; C ELECTROCATALYST; ORR CATALYST; IRON ATOMS; NITROGEN; NANOTUBES; FE/N/C,Fe single-atom catalysts;MOF-5;oxygen reduction reaction;PEMFCs;porous carbon;N-DOPED CARBON;METAL-ORGANIC FRAMEWORK;ACTIVE-SITES;C ELECTROCATALYST;ORR CATALYST;IRON ATOMS;NITROGEN;NANOTUBES;FE/N/C,lushang@mail.ipc.ac.cn; tierui@mail.ipc.ac.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1614-6832,,,,English,ADV ENERGY MATER,Article,WoS,Chemistry; Energy & Fuels; Materials Science; Physics,WOS:000730204100001,2-s2.0-85121384718,China,mail.ipc.ac.cn,Chinese Acad Sci;Univ Chinese Acad Sci,"Chinese Acad Sci, China;Univ Chinese Acad Sci, China","Xie, Xiaoying; Shang, Lu; Xiong, Xuyang; Shi, Run; Zhang, Tierui"
"Buschermohle, J.G., Muller-Hulstede, J., Schmies, H., Schonvogel, D., Zierdt, T., Lucka, R., Renz, F., Wagner, P., Wark, M.",Fe-Sn-N-C Catalysts: Advancing Oxygen Reduction Reaction Performance,2025,ACS CATALYSIS,15,6,,4477,4488,12,20,10.1021/acscatal.4c06338,,"[Buschermoehle, Julia G.; Mueller-Huelstede, Julia; Schmies, Henrike; Schonvogel, Dana; Zierdt, Tanja; Wagner, Peter] German Aerosp Ctr DLR, Inst Engn Thermodynam, D-26129 Oldenburg, Germany; [Buschermoehle, Julia G.; Wark, Michael] Carl von Ossietzky Univ Oldenburg, Inst Chem, D-26129 Oldenburg, Germany; [Lucka, Rene; Renz, Franz] Leibniz Univ Hannover, Inst Inorgan Chem, D-30167 Hannover, Germany",,"High-temperature proton exchange membrane fuel cells (HT-PEMFCs) typically rely on platinum-based catalysts, which require high loadings due to Pt deactivation by phosphates from the phosphoric acid-doped membrane. As alternative catalysts for the oxygen reduction reaction, metal-nitrogen-carbons (M-N-Cs) are promising due to their high intrinsic activity and tolerance to phosphates. However, low volumetric activity compared to Pt nanoparticles on carbon blacks (Pt/C) and insufficient stability limit their applicability. In order to enhance the stability and activity of Fe-N-Cs, this study investigates the incorporation of tin as a second metal, resulting in Fe-Sn-N-Cs, prepared by a metal-organic framework (MOF)-based approach. Stable and highly active catalysts with total mass activities of 8.2 A g-1 (Fe-Sn-N-C (1:1)) and 19.3 A g-1 (Fe-Sn-N-C (1:0.3)) in 0.5 mol L-1 H3PO4, drastically exceeding those of the commercial Fe-N-C catalyst PMF-014401 (Pajarito-Powder, 4.8 A g-1), are obtained by a synthesis without the need for subsequent purification steps. A stress test under harsh conditions (0.6-1.0 VRHE, 10,000 cycles, O2-saturated electrolyte) ascertains stability-enhancing effects of tin, highlighting an increase in stability in conjunction with the tin content. These results provide a valuable contribution to the development of cost-effective HT-PEMFCs by significantly enhancing the catalytic activity of platinum group metal-free catalysts.",PEM fuel cells; oxygen reduction reaction; non-PGM catalysts; metal organic frameworks; multimetalliccatalysts; M-N-C; rotating ring discelectrode,NITROGEN-CARBON CATALYSTS; DUAL-METAL SITES; PEM FUEL-CELLS; FE/N/C-CATALYSTS; DOPED CARBON; STABILITY; POLYANILINE; ADSORPTION; DESIGN; ORR,PEM fuel cells;oxygen reduction reaction;non-PGM catalysts;metal organic frameworks;multimetalliccatalysts;M-N-C;rotating ring discelectrode;NITROGEN-CARBON CATALYSTS;DUAL-METAL SITES;PEM FUEL-CELLS;FE/N/C-CATALYSTS;DOPED CARBON;STABILITY;POLYANILINE;ADSORPTION;DESIGN;ORR,julia.buschermoehle@dlr.de,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2155-5435,,,,English,ACS CATAL,Article,WoS,Chemistry,WOS:001435214200001,2-s2.0-85219477103,Germany,dlr.de,German Aerosp Ctr DLR;Carl von Ossietzky Univ Oldenburg;Leibniz Univ Hannover,"German Aerosp Ctr DLR, Germany;Carl von Ossietzky Univ Oldenburg, Germany;Leibniz Univ Hannover, Germany","Buschermoehle, Julia G.; Mueller-Huelstede, Julia; Schmies, Henrike; Schonvogel, Dana; Zierdt, Tanja; Lucka, Rene; Renz, Franz; Wagner, Peter; Wark, Michael"
"Cheng, Y., Wang, M., Lu, S., Tang, C., Wu, X., Veder, J.P., Johannessen, B., Thomsen, L., Zhang, J., Yang, S.Z., Wang, S., Jiang, S.P.",First demonstration of phosphate enhanced atomically dispersed bimetallic FeCu catalysts as Pt-free cathodes for high temperature phosphoric acid doped polybenzimidazole fuel cells,2021,Applied Catalysis B: Environmental,284,,119717,,,,42,10.1016/j.apcatb.2020.119717,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097889091&doi=10.1016%2Fj.apcatb.2020.119717&partnerID=40&md5=6d53bba04c94317984387e801d355ce1,"Department of Environmental Engineering, Central South University, Changsha, Hunan, China; Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, United States; Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, Beihang University, Beijing, China; John de Laeter Research Centre, Perth, WA, Australia; Australian Synchrotron, Clayton, VIC, Australia; Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States; State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Hunan University, Changsha, Hunan, China; Energy and Chemical Engineering, WA School of Mines: Minerals, Energy and Chemical Engineering, Kalgoorlie, WA, Australia","Cheng, Yi, Department of Environmental Engineering, Central South University, Changsha, Hunan, China; Wang, Mengen, Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, United States; Lu, Shanfu, Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, Beihang University, Beijing, China; Tang, Chongjian, Department of Environmental Engineering, Central South University, Changsha, Hunan, China; Wu, Xing, Department of Environmental Engineering, Central South University, Changsha, Hunan, China; Veder, Jean Pierre Marcel, John de Laeter Research Centre, Perth, WA, Australia; Johannessen, Bernt, Australian Synchrotron, Clayton, VIC, Australia; Thomsen, Lars, Australian Synchrotron, Clayton, VIC, Australia; Zhang, Jin, Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, Beihang University, Beijing, China; Yang, Shize, Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, United States, Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Wang, Shuangyin, State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Hunan University, Changsha, Hunan, China; Jiang, Sanping, Energy and Chemical Engineering, WA School of Mines: Minerals, Energy and Chemical Engineering, Kalgoorlie, WA, Australia","Phosphate poisoning of Pt electrocatalysts is one of the major barriers that constrains the performance of phosphoric acid-doped polybenzimidazole (PA/PBI) membrane fuel cells. Herein, we developed new atomically dispersed bimetallic FeCu coordinated with nitrogen-doped carbon nanotubes (FeCu/N-CNTs) as Pt-free oxygen reduction reaction (ORR) electrocatalysts. The cell with FeCu/N-CNTs cathodes delivers a peak power density of 302 mWcm−2 at 230℃, similar to that using Pt/C electrocatalysts (1 mg<inf>Pt</inf> cm−2) but with a much better stability. In contrast to phosphate poisoning of Pt/C, FeCu/N-CNTs show PA enhanced activities. DFT calcualtions indicate that phosphate promotion effect results from the stronger binding of phosphate on Cu sites, which decreases the activation energy barrier for the cleavage of the O<inf>2</inf> double bond and provides local protons to facilitate the proton-coupled electron transfer ORR. The results also show that FeCu/N-CNTs have a much better activity for ORR as comapre to Fe single atom catalysts coordinated with nitrogen-doped carbon nanotubes, Fe/N-CNTs. This study demonstrates the promising potential of bimetallic FeCu/N-CNTs as true Pt-free, highly active and durable cathodes for PA/PBI based high temperature polymer electrolyte fuel cells. © 2020 Elsevier B.V.",Atomically dispersed bimetallic FeCu catalysts; High temperature polymer electrolyte membrane fuel cells; Oxygen reduction reaction; Phosphate promotion effect; Pt-free cathodes,Activation energy; Binary alloys; Binding sites; Carbon nanotubes; Cathodes; Coordination reactions; Copper alloys; Doping (additives); Electrocatalysts; Electrolysis; Electrolytic reduction; Electron transport properties; Gas fuel purification; Nitrogen; Oxygen reduction reaction; Phosphoric acid; Phosphoric acid fuel cells (PAFC); Platinum alloys; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); High-temperature polymer electrolyte fuel cells; Membrane fuel cells; Nitrogen doped carbon nanotubes; Peak power densities; Phosphoric acid doped polybenzimidazole; Proton coupled electron transfers; Pt electrocatalysts; Pt/C electrocatalysts; Iron alloys,Atomically dispersed bimetallic FeCu catalysts;High temperature polymer electrolyte membrane fuel cells;Oxygen reduction reaction;Phosphate promotion effect;Pt-free cathodes;Activation energy;Binary alloys;Binding sites;Carbon nanotubes;Cathodes;Coordination reactions;Copper alloys;Doping (additives);Electrocatalysts;Electrolysis;Electrolytic reduction;Electron transport properties;Gas fuel purification;Nitrogen;Phosphoric acid;Phosphoric acid fuel cells (PAFC);Platinum alloys;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);High-temperature polymer electrolyte fuel cells;Membrane fuel cells;Nitrogen doped carbon nanotubes;Peak power densities;Phosphoric acid doped polybenzimidazole;Proton coupled electron transfers;Pt electrocatalysts;Pt/C electrocatalysts;Iron alloys,"S. Wang; State Key Laboratory of Chem/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China; email: shuangyinwang@hnu.edu.cn; S.-Z. Yang; Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, 11973, United States; email: shize@bnl.gov",,,,,,Elsevier B.V.,09263373,,ACBEE,,English,Appl. Catal. B Environ.,Article,Scopus,,2-s2.0-85097889091,,China;United States;Australia,hnu.edu.cn,,,"Cheng, Y.; Wang, M.; Lu, S.; Tang, C.; Wu, X.; Veder, J.-P.; Johannessen, B.; Thomsen, L.; Zhang, J.; Yang, S.-Z.; Wang, S.; Jiang, S.P."
"Samala, N.R., Krishnamurthy, C.B., Grinberg, I.",First-Principles Study of the Ligand Substituent Effect on ORR Catalysis by Metallocorroles,2020,Journal of Physical Chemistry C,124,21,,11275,11283,,30,10.1021/acs.jpcc.9b11990,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85087977185&doi=10.1021%2Facs.jpcc.9b11990&partnerID=40&md5=6b6bcef8070a21dbcb51ed9d868ff848,"Department of Chemistry, Bar-Ilan University, Ramat Gan, Tel Aviv District, Israel","Samala, Nagaprasad Reddy, Department of Chemistry, Bar-Ilan University, Ramat Gan, Tel Aviv District, Israel; Krishnamurthy, Chethana Bhadravathi, Department of Chemistry, Bar-Ilan University, Ramat Gan, Tel Aviv District, Israel; Grinberg, Ilya, Department of Chemistry, Bar-Ilan University, Ramat Gan, Tel Aviv District, Israel","Metallocorroles (M-N-C) and especially Co-corroles are some of the best molecular catalyst alternatives to the expensive platinum-group metals (PGM) for oxygen reduction reaction (ORR) catalysis in polymer electrolyte membrane (PEM) fuel cells. In this work, we study the M-N-C corroles (M = Mn, Fe, Co) and the ligand (L) substitution (L-M-N-C, L = H, CH3, CF3, and imidazole) on the metal site as ORR catalysts based on the free energies of the*OOH,*O, and*OH ORR pathway intermediates. We also examine the influence of the basis set size, density functional theory exchange-correlation functional, and solvent environment on the calculated energies for the*OOH,*O, and*OH intermediates. We find that improved catalytic performance is expected in the ligand-substituted Mn-N-C that can be further fine-tuned by changing the nature of the ligand and the substituent group on the corrole. By contrast, the catalytic activity of the Co-corrole is decreased by the ligand substitution. The obtained ORR energetics are sensitive to basis set size, exchange-correlation functional, and solvent environment with the best agreement with the experiment obtained for large (6-311++G**) basis set, PBE functional, and gas-phase ORR intermediate calculations. © © 2020 American Chemical Society.",,Calculations; Catalysis; Catalyst activity; Density functional theory; Electrolytic reduction; Ligands; Manganese compounds; Metals; Molecular oxygen; Oxygen reduction reaction; Polyelectrolytes; Catalytic performance; Exchange-correlation functionals; First-principles study; Ligand substituents; Ligand substitution; Platinum group metals; Polymer electrolyte membranes; Solvent environments; Proton exchange membrane fuel cells (PEMFC),Calculations;Catalysis;Catalyst activity;Density functional theory;Electrolytic reduction;Ligands;Manganese compounds;Metals;Molecular oxygen;Oxygen reduction reaction;Polyelectrolytes;Catalytic performance;Exchange-correlation functionals;First-principles study;Ligand substituents;Ligand substitution;Platinum group metals;Polymer electrolyte membranes;Solvent environments;Proton exchange membrane fuel cells (PEMFC),"I. Grinberg; Department of Chemistry, Bar-Ilan University, Ramat Gan, 52900, Israel; email: ilya.grinberg@biu.ac.il",,,,,,American Chemical Society service@acs.org,19327447,,,,English,J. Phys. Chem. C,Article,Scopus,,2-s2.0-85087977185,,Israel,biu.ac.il,,,"Samala, N.R.; Krishnamurthy, C.B.; Grinberg, I."
"Leng, Y.M., Yang, B.L., Zhao, Y., Xiang, Z.H.",Fluorinated bimetallic nanoparticles decorated carbon nanofibers as highly active and durable oxygen electrocatalyst for fuel cells,2022,JOURNAL OF ENERGY CHEMISTRY,73,,,549,555,7,26,10.1016/j.jechem.2022.04.026,,"[Leng, Yiming; Yang, Bolong; Zhao, Yun; Xiang, Zhonghua] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China",,"The low activity and durability are still the critical barriers for non-precious metal electrocatalyst, mainly involving M-N/C (M = Fe, Co, Mn et al), applied in fuel cell. Constructing bimetallic sites has been explored as an effective method to boost the performance of the catalyst for the synergistic effect between metal atoms. However, this synergistic effect is always suppressed in acidic conditions and results in unstable catalytic performance. Here we create novel fluorinated iron (Fe) and cobalt (Co) bimetallic nanoparticles distributed on nitrogen-doped carbon nanofibers (CNFs) for oxygen reduction reaction (ORR). The fluorination strongly increased the charge density of the bimetallic catalyst and resulted in a remarkable catalytic performance with the half-wave potential of 804 mV in 0.1 M HClO4 and 1.6 times power density improvement for the proton exchange membrane fuel cell device. Importantly, the chemical and mechanical robust CNFs support improved the electric conductivity and stability of bimetallic catalysts, which leads to an ultra-stable electrocatalyst. The fuel cell voltage can keep stable even after 110 h, instead of the continuingly decrease in the traditional M-N/C. (C) 2022 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.",Bimetallic catalyst; Fluorination; Electrospinning; ORR catalyst; PEM fuel cell,FE-N-C; REDUCTION REACTION; METAL-FREE; POROUS CARBON; CATALYSTS; ALKALINE; ORR; NITROGEN; SULFUR; HETEROATOMS,Bimetallic catalyst;Fluorination;Electrospinning;ORR catalyst;PEM fuel cell;FE-N-C;REDUCTION REACTION;METAL-FREE;POROUS CARBON;CATALYSTS;ALKALINE;ORR;NITROGEN;SULFUR;HETEROATOMS,Zhaoyun@mail.buct.edu.cn; xiangzh@mail.buct.edu.cn,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2095-4956,,,,English,J ENERGY CHEM,Article,WoS,Chemistry; Energy & Fuels; Engineering,WOS:000855247600002,2-s2.0-85134931645,China,mail.buct.edu.cn,Beijing Univ Chem Technol,"Beijing Univ Chem Technol, China","Leng, Yiming; Yang, Bolong; Zhao, Yun; Xiang, Zhonghua"
"Gao, R., Qiu, Z., Xu, K., Zhai, Z., Cong, Y., Jiang, Q., Zhang, G., Lv, Y., Guo, Y., Li, Y., Xu, Q., Xiao, Y., Pang, Y., Wang, Y., Song, Y.",Fluorine-decorated high loading Fe-N-C electrocatalysts for proton exchange membrane fuel cells,2023,Journal of Materials Chemistry A,11,47,,26044,26051,,4,10.1039/d3ta05464k,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85178302315&doi=10.1039%2Fd3ta05464k&partnerID=40&md5=24fd088683d4441cc0c08ec0b69f7c9f,"State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, China; School of Mechanical Engineering, Shenyang University, Shenyang, Liaoning, China; College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, Gansu, China; Instrumentation and Service Center for Physical Sciences, Westlake University, Hangzhou, Zhejiang, China; Samueli School of Engineering, Irvine, CA, United States","Gao, Rui, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, China; Qiu, Zhongyu, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, China; Xu, Kun, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, China; Zhai, Zihui, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, China, School of Mechanical Engineering, Shenyang University, Shenyang, Liaoning, China; Cong, Yuanyuan, College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, Gansu, China; Jiang, Qike, Instrumentation and Service Center for Physical Sciences, Westlake University, Hangzhou, Zhejiang, China; Zhang, Guanghui, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, China; Lv, Yang, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, China; Guo, Yizheng, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, China; Li, Yongpeng, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, China; Xu, Qingchuan, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, China; Xiao, Yi, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, China; Pang, Yiheng, Samueli School of Engineering, Irvine, CA, United States; Wang, Yun, Samueli School of Engineering, Irvine, CA, United States; Song, Yujiang, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, China","Fe-N-C electrocatalysts bear the high promise to eventually substitute platinum for acidic oxygen reduction reaction (ORR). However, the loading of atomically dispersed Fe in Fe-N-C is frequently less than 3 wt% and has a relatively low ORR activity. Herein, we report the synthesis of F-decorated Fe-N-C (F-Fe-N-C) by pyrolysis of trifluoromethyl imidazole decorated zeolitic imidazolate framework-8 with hemin as Fe precursor. Interestingly, F-Fe-N-C exhibits an exceptional half-wave potential of 0.858 V (vs. RHE) primarily because of atomically dispersed 7.1 wt% Fe in the form of FeIIIN<inf>4</inf>C<inf>12</inf> and FeIIN<inf>4</inf>C<inf>10</inf>. Moreover, F-Fe-N-C catalyst layers (CLs) enable a high single cell power density that is 2.4 times that of house-made Fe-N-C. According to theoretical studies together with mercury intrusion porosimetry, the enhancement of single cell performance appears to originate from the high activity of F-Fe-N-C, abundant pore volume including nanopores where Knudsen diffusion dominates, and F-induced scattered distribution of ionomer for proton transfer. © 2023 The Royal Society of Chemistry.",,Electrolytic reduction; Fluorine; Iron; Proton exchange membrane fuel cells (PEMFC); Fe precursor; Half-wave potential; High loadings; Imidazol; Low oxygen; Oxygen reduction reaction; Proton-exchange membranes fuel cells; Reaction activity; Trifluoromethyl; Zeolitic imidazolate framework-8; Electrocatalysts,Electrolytic reduction;Fluorine;Iron;Proton exchange membrane fuel cells (PEMFC);Fe precursor;Half-wave potential;High loadings;Imidazol;Low oxygen;Oxygen reduction reaction;Proton-exchange membranes fuel cells;Reaction activity;Trifluoromethyl;Zeolitic imidazolate framework-8;Electrocatalysts,"Y. Wang; Mechanical and Aerospace Engineering, University of California, Irvine, 92697-3975, United States; email: yunw@uci.edu; Y. Song; State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 2 Linggong Road, 116024, China; email: yjsong@dlut.edu.cn",,,,,,Royal Society of Chemistry,20507488,,JMCAE,,English,J. Mater. Chem. A,Article,Scopus,,2-s2.0-85178302315,,China;United States,uci.edu,,,"Gao, R.; Qiu, Z.; Xu, K.; Zhai, Z.; Cong, Y.; Jiang, Q.; Zhang, G.; Lv, Y.; Guo, Y.; Li, Y.; Xu, Q.; Xiao, Y.; Pang, Y.; Wang, Y.; Song, Y."
"Gong, L.Y., Tao, L., Wang, L., Fu, X.Z., Wang, S.Y.",Focus on the catalysts to resist the phosphate poisoning in high-temperature proton exchange membrane fuel cells,2025,CHINESE JOURNAL OF CATALYSIS,68,,,155,176,22,4,10.1016/S1872-2067(24)60162-2,,"[Gong, Liyuan; Wang, Lei; Fu, Xian-Zhu] Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China; [Gong, Liyuan] Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Guangdong, Peoples R China; [Gong, Liyuan; Tao, Li; Wang, Shuangyin] Hunan Univ, Coll Chem & Chem Engn, Adv Catalyt Engn Res Ctr Minist Educ, State Key Lab Chemo Biosensing & Chemometr,Natl Su, Changsha 410082, Hunan, Peoples R China; [Tao, Li; Wang, Shuangyin] Hunan Univ, Greater Bay Area Inst Innovat, Guangzhou 511300, Guangdong, Peoples R China",,"Investigating highly effective electrocatalysts for high-temperature proton exchange membrane fuel cells (HT-PEMFC) requires the resistance to phosphate acid (PA) poisoning at cathodic oxygen reduction reaction (ORR). Recent advancements in catalysts have focused on alleviating phosphoric anion adsorption on Pt-based catalysts with modified electronic structure or catalytic interface and developing Fe-N-C based catalysts with immunity of PA poisoning. Fe-N-C-based catalysts have emerged as promising alternatives to Pt-based catalysts, offering significant potential to overcome the characteristic adsorption of phosphate anion on Pt. An overview of these developments provides insights into catalytic mechanisms and facilitates the design of more efficient catalysts. This review begins with an exploration of basic poisoning principles, followed by a critical summary of characterization techniques employed to identified the underlying mechanism of poisoning effect. Attention is then directed to endeavors aimed at enhancing the HT-PEMFC performance by well-designed catalysts. Finally, the opportunities and challenges in developing the anti-PA poisoning strategy and practical HT-PEMFC is discussed. Through these discussions, a comprehensive understanding of PA-poisoning bottlenecks and inspire future research directions is aim to provided. (c) 2025, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.",Fuel cell; High-temperature; Phosphate acid poisoning; Activity degradation; Electrocatalyst design,OXYGEN REDUCTION REACTION; PLATINIZED PLATINUM-ELECTRODES; PHOSPHORIC-ACID ADSORPTION; ANION ADSORPTION; PGM-FREE; HIGH CO; PERFORMANCE; ALLOY; SURFACES; KINETICS,Fuel cell;High-temperature;Phosphate acid poisoning;Activity degradation;Electrocatalyst design;OXYGEN REDUCTION REACTION;PLATINIZED PLATINUM-ELECTRODES;PHOSPHORIC-ACID ADSORPTION;ANION ADSORPTION;PGM-FREE;HIGH CO;PERFORMANCE;ALLOY;SURFACES;KINETICS,taoli@hnu.edu.cn; xz.fu@szu.edu.cn; shuangyinwang@hnu.edu.cn,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0253-9837,,,,English,CHINESE J CATAL,Review,WoS,Chemistry; Engineering,WOS:001411277000001,2-s2.0-85214339792,China,hnu.edu.cn,Shenzhen Univ;Hunan Univ,"Shenzhen Univ, China;Hunan Univ, China","Gong, Liyuan; Tao, Li; Wang, Lei; Fu, Xian-Zhu; Wang, Shuangyin"
"Sudarsono, W., Tan, S.Y., Wong, W.Y., Omar, F.S., Ramya, K., Mehmood, S., Numan, A., Walvekar, R., Khalid, M.",From catalyst structure design to electrode fabrication of platinum-free electrocatalysts in proton exchange membrane fuel cells: A review,2023,JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY,122,,,1,26,26,19,10.1016/j.jiec.2023.03.004,,"[Sudarsono, Wulandhari; Tan, Sue Ying; Wong, Wai Yin] Univ Kebangsaan Malaysia, Fuel Cell Inst, Bangi 43600, Selangor, Malaysia; [Omar, Fatin Saiha] Univ Kebangsaan Malaysia, Fac Sci & Technol, Dept Appl Phys, Bangi 43600, Selangor, Malaysia; [Ramya, K.] Ctr Fuel Cell Technol, Int Adv Res Ctr Powder Met & New Mat ARCI, IIT M Res Pk, Chennai 600113, India; [Mehmood, Shahid] Thammasat Univ, FAME Sirindhorn Int Inst Technol SIIT, Ctr Excellence Funct Adv Mat Engn, Pathum Thani 12120, Thailand; [Numan, Arshid; Khalid, Mohammad] Sunway Univ, Sch Engn & Technol, Graphene & Adv 2D Mat Res Grp GAMRG, Petaling Jaya 47500, Selangor, Malaysia; [Numan, Arshid; Khalid, Mohammad] Sunway Univ, Sch Engn & Technol, Sunway Mat Smart Sci & Engn SMS 2E Cluster, Bandar Sunway 47500, Selangor, Malaysia; [Walvekar, Rashmi] Xiamen Univ Malaysia, Sch New Energy & Chem Engn, Dept Chem Engn, Jalan Sunsuria, Sepang 43900, Selangor, Malaysia; [Khalid, Mohammad] Uttaranchal Univ, Dehra Dun 248007, Uttaranchal, India",,"The development of low-cost fuel cell technology has involved substantial research on platinum-free or non-platinum group metal (non-PGM) catalysts for oxygen reduction reactions (ORR) in proton exchange membrane fuel cells. However, due to macroscale degradation and flooding issues in fuel cell systems, catalyst development has faced significant challenges in rapid active site degradation over a short time. This review presents the impacts of the non-PGM catalyst structure on the ORR activity and single-cell performance. A balance in the micropores, mesopores and macropores is sought to ensure high accessi-bility to the active sites, a high active site density, and good water management at the electrode layer to prevent active site blockage. The unsatisfactory single-cell performance of non-PGM electrodes also potentially arises from the conventional catalyst ink-casting technique. This review also provides insight into the necessary strategies for producing non-PGM MEAs via proper porous architecture and innovative catalyst casting techniques to develop promising low-cost PEMFC technology.(c) 2023 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.",Platinum-free; Electrode Fabrication; Electrocatalysts; PEMFC; ORR,OXYGEN REDUCTION REACTION; STRUCTURE-PERFORMANCE CORRELATION; IRON-BASED CATALYSTS; N-C ELECTROCATALYST; HIGH-AREA CARBON; HIGH-TEMPERATURE; CATHODE CATALYSTS; DOPED GRAPHENE; METAL-CATALYSTS; POROUS CARBON,Platinum-free;Electrode Fabrication;Electrocatalysts;PEMFC;ORR;OXYGEN REDUCTION REACTION;STRUCTURE-PERFORMANCE CORRELATION;IRON-BASED CATALYSTS;N-C ELECTROCATALYST;HIGH-AREA CARBON;HIGH-TEMPERATURE;CATHODE CATALYSTS;DOPED GRAPHENE;METAL-CATALYSTS;POROUS CARBON,waiyin.wong@ukm.edu.my; khalids@sunway.edu.my,,"STE 800, 230 PARK AVE, NEW YORK, NY 10169 USA",,,,ELSEVIER SCIENCE INC,1226-086X,,,,English,J IND ENG CHEM,Review,WoS,Chemistry; Engineering,WOS:000982019200001,2-s2.0-85151300042,Malaysia;India;Thailand,ukm.edu.my,Univ Kebangsaan Malaysia;Ctr Fuel Cell Technol;Thammasat Univ;Sunway Univ;Xiamen Univ Malaysia;Uttaranchal Univ,"Univ Kebangsaan Malaysia, Malaysia;Ctr Fuel Cell Technol, India;Thammasat Univ, Thailand;Sunway Univ, Malaysia;Xiamen Univ Malaysia, Malaysia;Uttaranchal Univ, India","Sudarsono, Wulandhari; Tan, Sue Ying; Wong, Wai Yin; Omar, Fatin Saiha; Ramya, K.; Mehmood, Shahid; Numan, Arshid; Walvekar, Rashmi; Khalid, Mohammad"
"Zhang, Y.F., Xiao, F., Chen, G.Y., Shao, M.",Fuel Cell Performance of Non-Precious Metal Based Electrocatalysts; 基于非贵金属氧还原催化剂的质子交换膜燃料电池性能,2020,Journal of Electrochemistry,26,4,,563,572,,7,10.13208/j.electrochem.200314,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85135914978&doi=10.13208%2Fj.electrochem.200314&partnerID=40&md5=712be83009a02bd4d64c576f6bd642fe,"Ltd., Yancheng, Jiangsu, China; Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Ltd, Shanghai, Shanghai, China; Yangtse Delta Academy of NEV CO.,LTD, Yancheng, China; Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, Guangdong, China; Energy Institute, Hong Kong University of Science and Technology, Hong Kong, Hong Kong","Zhang, Yanfeng, Ltd., Yancheng, Jiangsu, China, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Ltd, Shanghai, Shanghai, China, Yangtse Delta Academy of NEV CO.,LTD, Yancheng, China; Xiao, Fei, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Chen, Guangyu, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, Guangdong, China; Shao, Minhua, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, Guangdong, China, Energy Institute, Hong Kong University of Science and Technology, Hong Kong, Hong Kong","The commercialization of proton exchange membrane fuel cells (PEMFCs) is hindered by high cost and low durability of Pt based electrocatalysts. Developing efficient and durable non-precious metal catalysts is a promising approach to addressing these conundrums. Among them, transition metals dispersed in a nitrogen (N)-doped carbon support (M-N-C) show good oxygen reduction reaction activity. This article reviews recent progress in M-N-C catalysts development, focusing on the catalysts design, membrane electrode assembly fabrication, fuel cell performance, and durability testing. Template-assisted approach is an efficient way to synthesize M-N-C materials with homogeneously dispersed single atom active site and reduced metal particles, carbides formation. However, the issue related to low intensity of active sites should be addressed via strengthening metal-ligand interaction and using high surface area precursors. In general, the catalyst loading for the membrane electrode assembly (MEA) of non-precious catalyst is high (3 ~ 4 mg•cm-2) in order to obtain acceptable performance, which is also highly dependent on ink preparation and coating protocol, ionomer/catalyst ratio, etc. The highest power densities for Fe-N-C and Co-N-C are reported to be 1.18 and 0.87 W•cm-2 with O<inf>2</inf> at the cathode, respectively. Despite the significant progress in non-precious metal catalysts development, the undesired durability (only a few hundreds of hours) is still far from the target of 5000 h by 2025. Thus, much more efforts should be spent on improving their durability. © 2020 Journal of Electrochemistry. All rights reserved.",durability; membrane electrode assembly; non-precious metal catalysts; proton exchange membrane fuel cells,,durability;membrane electrode assembly;non-precious metal catalysts;proton exchange membrane fuel cells,"M.-H. Shao; Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Kowloon, Clear Water Bay, Hong Kong; email: kemshao@ust.hk",,,,,,Chinese Chemical Society,10063471,,,,Chinese,J. Electrochem.,Article,Scopus,,2-s2.0-85135914978,,China;Hong Kong,ust.hk,,,"Zhang, Y.-F.; Xiao, F.; Chen, G.-Y.; Shao, M."
"Zhao, T., Hu, F., Zhu, M., Yang, C.J., Wang, X.Y., Pan, Y.Z., Yang, J., Zhang, X., Li, W.H., Wang, D.",Future development of single-atom catalysts in portable energy and sensor technologies,2025,Chinese Journal of Catalysis,78,,,100,137,,0,10.1016/S1872-2067(25)64814-5,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105021319437&doi=10.1016%2FS1872-2067%2825%2964814-5&partnerID=40&md5=3bb1bb23212f8de7c30f40135ef93fbc,"Northeastern University's Department of Chemistry, Shenyang, Liaoning, China; Department of Chemistry, Tsinghua University, Beijing, China; Department of Chemistry, City University of Hong Kong, Hong Kong, Hong Kong; Joint Key Laboratory, University of Macau, Taipa, Macao; Foshan Graduate School of Northeastern University, Foshan, Guangdong, China","Zhao, Tianyou, Northeastern University's Department of Chemistry, Shenyang, Liaoning, China; Hu, Fengming, Joint Key Laboratory, University of Macau, Taipa, Macao; Zhu, Meiqi, Northeastern University's Department of Chemistry, Shenyang, Liaoning, China; Yang, Changjie, Department of Chemistry, Tsinghua University, Beijing, China; Wang, Xinyu, Department of Chemistry, Tsinghua University, Beijing, China; Pan, Yongzhou, Northeastern University's Department of Chemistry, Shenyang, Liaoning, China; Yang, Jiarui, Department of Chemistry, City University of Hong Kong, Hong Kong, Hong Kong; Zhang, Xian, Northeastern University's Department of Chemistry, Shenyang, Liaoning, China; Li, Wenhao, Northeastern University's Department of Chemistry, Shenyang, Liaoning, China, Foshan Graduate School of Northeastern University, Foshan, Guangdong, China; Wang, Dingsheng, Department of Chemistry, Tsinghua University, Beijing, China","With the rapid advancement of portable energy devices and sensor technologies, enhancing their catalytic performance, sensing capabilities, and application reliability has become a critical challenge in the fields of materials and energy science. Single-atom catalysts (SACs), owing to their high atomic utilization, outstanding catalytic activity, and precisely engineered structures enabled by density functional theory and enhanced by artificial intelligence, have shown tremendous potential in advancing portable energy and sensing technologies. While existing reviews predominantly focus on the application of SACs in individual portable devices, systematic discussions on their overall development prospects and challenges within portable energy and sensor fields remain scarce. Therefore, this review comprehensively explores the application potential and recent advancements of SACs in portable zinc-air batteries, proton exchange membrane fuel cells, and sensor technologies. The article highlights the influence of key factors such as material design, structural optimization, and packaging integration on device performance, while also addressing the primary bottlenecks and challenges encountered in current practical applications. Furthermore, it suggests possible future development directions, aiming to offer theoretical insights and engineering guidance for the large-scale deployment of SACs in wearable electronic devices, portable energy systems, and smart sensing technologies. © 2025 Dalian Institute of Chemical Physics, the Chinese Academy of Sciences",Fuel cells; Portable; Sensors; Single-atom catalysts; Zinc-air batteries,Atoms; Catalyst activity; Density functional theory; Electron devices; Packaging materials; Portable equipment; Structural optimization; Wearable sensors; Zinc; Energy sensors; Energy technologies; Portable; Portable energy; Portable sensors; Sensor technologies; Single-atom catalyst; Single-atoms; Zinc-air battery; ]+ catalyst; Fuel cells,Fuel cells;Portable;Sensors;Single-atom catalysts;Zinc-air batteries;Atoms;Catalyst activity;Density functional theory;Electron devices;Packaging materials;Portable equipment;Structural optimization;Wearable sensors;Zinc;Energy sensors;Energy technologies;Portable energy;Portable sensors;Sensor technologies;Single-atom catalyst;Single-atoms;Zinc-air battery;]+ catalyst,"Y.-Z. Pan; Department of Chemistry, Northeastern University, Shenyang, Liaoning, 110819, China; email: panyz0412@163.com; X. Zhang; Department of Chemistry, Northeastern University, Shenyang, Liaoning, 110819, China; email: xzhang@mail.neu.edu.cn; W.-H. Li; Department of Chemistry, Northeastern University, Shenyang, Liaoning, 110819, China; email: liwenhao@mail.neu.edu.cn; D. Wang; Department of Chemistry, Tsinghua University, Beijing, 100084, China; email: wangdingsheng@mail.tsinghua.edu.cn",,,,,,Science Press,18722067,,CJCHC,,English,Chin. J. Catal.,Review,Scopus,,2-s2.0-105021319437,,China;Hong Kong;Macao,163.com,,,"Zhao, T.; Hu, F.; Zhu, M.; Yang, C.-J.; Wang, X.-Y.; Pan, Y.-Z.; Yang, J.; Zhang, X.; Li, W.-H.; Wang, D."
"Deng, Y.J., Chi, B., Tian, X.L., Cui, Z.M., Liu, E.S., Jia, Q.Y., Fan, W.J., Wang, G.H., Dang, D., Li, M.S., Zang, K.T., Luo, J., Hu, Y.F., Liao, S.J., Sun, X.L., Mukerjee, S.",g-C3N4 promoted MOF derived hollow carbon nanopolyhedra doped with high density/fraction of single Fe atoms as an ultra-high performance non-precious catalyst towards acidic ORR and PEM fuel cells,2019,JOURNAL OF MATERIALS CHEMISTRY A,7,9,,5020,5030,11,186,10.1039/c8ta11785c,,"[Deng, Yijie; Chi, Bin; Tian, Xinlong; Cui, Zhiming; Fan, Wenjun; Wang, Guanghua; Dang, Dai; Liao, Shijun] South China Univ Technol, Sch Chem & Chem Engn, Key Lab Fuel Cell Technol Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China; [Deng, Yijie] Dongguan Univ Technol, Sch Environm & Civil Engn, Dongguan, Peoples R China; [Li, Minsi; Sun, Xueliang] Univ Western Ontario, Dept Mech & Mat Engn, 1151 Richmond St, London, ON N6A 3K7, Canada; [Liu, Ershuai; Jia, Qingying; Mukerjee, Sanjeev] Northeastern Univ, Dept Chem & Chem Biol, Boston, MA 02115 USA; [Zang, Ketao; Luo, Jun] Tianjin Univ Technol, TUT FEI Joint Lab, Tianjin Key Lab Adv Funct Porous Mat,Sch Mat Sci, Ctr Electron Microscopy,Inst New Energy Mat & Low, Tianjin 300384, Peoples R China; [Hu, Yongfeng] Canadian Light Source, 44 Innovat Blvd, Saskatoon, SK S7N 2V3, Canada",,"We report a hollow carbon nanopolyhedron catalyst doped with N and single Fe atoms, prepared by pyrolyzing hollow ZIF-8 with ferric acetylacetonate and g-C3N4. The catalyst retains the polyhedral morphology of its precursor and possesses exclusively Fe-N-4 moieties promoted by g-C3N4 nitriding, evidenced by multipronged microscopic and spectroscopic analyses. In rotating disk measurements, the catalyst exhibits superior ORR activity in both acidic and alkaline media, with a half-wave potential of 0.78 V in the former and 0.845 V in the latter. In addition, its ORR stability surpasses that of commercial Pt/C in acidic and alkaline media. Most notably, the catalyst exhibits ultra-high performance in a H-2/O-2 proton exchange membrane fuel cell (PEMFC), with a current density of 400 mA cm(-2) at 0.7 V and 133 mA cm(-2) at 0.8 V, and a maximum power density of 628 mW cm(-2). This is among the best PEMFC performances reported for cathodes free of platinum-group metals. We attribute this excellent-ORR activity to the integration of the high density Fe(ii)-N-4-H2O moiety (4.51956 x 10(13) sites cm(-2)) embedded in the carbon framework, identified by in situ X-ray absorption spectroscopy, and the well-balanced micro/meso/macroporous structure.",,OXYGEN REDUCTION REACTION; METAL-ORGANIC FRAMEWORKS; POROUS CARBON; GRAPHITIC CARBON; FE/N/C-CATALYSTS; ELECTROCATALYSTS; SITES; IRON; NANOPARTICLES; NANOSTRUCTURES,OXYGEN REDUCTION REACTION;METAL-ORGANIC FRAMEWORKS;POROUS CARBON;GRAPHITIC CARBON;FE/N/C-CATALYSTS;ELECTROCATALYSTS;SITES;IRON;NANOPARTICLES;NANOSTRUCTURES,chsjliao@scut.edu.cn; xsun9@uwo.ca,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000460687400075,,China;Canada;United States,scut.edu.cn,South China Univ Technol;Dongguan Univ Technol;Univ Western Ontario;Northeastern Univ;Tianjin Univ Technol;Canadian Light Source,"South China Univ Technol, China;Dongguan Univ Technol, China;Univ Western Ontario, Canada;Northeastern Univ, United States;Tianjin Univ Technol, China;Canadian Light Source, Canada","Deng, Yijie; Chi, Bin; Tian, Xinlong; Cui, Zhiming; Liu, Ershuai; Jia, Qingying; Fan, Wenjun; Wang, Guanghua; Dang, Dai; Li, Minsi; Zang, Ketao; Luo, Jun; Hu, Yongfeng; Liao, Shijun; Sun, Xueliang; Mukerjee, Sanjeev"
"Wu, Y.K., Li, X.K., Hua, K., Duan, X., Ding, R., Rui, Z.Y., Cao, F., Yuan, M.C., Li, J., Liu, J.G.",Generalized Encapsulations of ZIF-Based Fe-N-C Catalysts with Controllable Nitrogen-Doped Carbon for Significantly-Improved Stability Toward Oxygen Reduction Reaction,2023,SMALL,19,25,,,,9,21,10.1002/smll.202207671,,"[Wu, Yongkang; Li, Xiaoke; Hua, Kang; Duan, Xiao; Ding, Rui; Rui, Zhiyan; Cao, Feng; Yuan, Mengchen] Nanjing Univ, Coll Engn & Appl Sci, 22 Hankou Rd, Nanjing 210093, Peoples R China; [Li, Jia; Liu, Jianguo] North China Elect Power Univ, Energy & Power Innovat Res Inst, 2 Beinong Rd, Beijing 102206, Peoples R China",,"The vigorous development of efficient platinum group metal-free catalysts is considerably important to facilitate the universal application of proton exchange membrane fuel cells. Although nitrogen-coordinated atomic iron intercalated in carbon matrix (Fe-N-C) catalysts exhibit promising catalytic activity, the performance in fuel cells, especially the short lifetime, remains an obstacle. Herein, a highly-active Fe-N-C catalyst with a power density of >1 w cm(-2) and prolonged discharge stability with a current density of 357 mA cm(-2) after 40 h of constant voltage discharge at 0.7 V in H-2-O-2 fuel cells using a controllable and efficient N-C coating strategy is developed. It is clarified that a thicker N-C coating may be more favorable to enhance the stability of Fe-N-C catalysts at the expense of their catalytic activity. The stability enhancement mechanism of the N-C coating strategy is proven to be the synergistic effect of reduced carbon corrosion and iron loss. It is believed that these findings can contribute to the development of Fe-N-C catalysts with high activity and long lifetimes.",fuel cells; Fe-N-C catalysts; N-C coating; stability,PEM FUEL-CELLS; PERFORMANCE; SITES; ELECTROCATALYSTS; IDENTIFICATION; FLUORINATION; DURABILITY; CATHODE; FE/N/C; IRON,fuel cells;Fe-N-C catalysts;N-C coating;stability;PEM FUEL-CELLS;PERFORMANCE;SITES;ELECTROCATALYSTS;IDENTIFICATION;FLUORINATION;DURABILITY;CATHODE;FE/N/C;IRON,lijia@ncepu.edu.cn; jianguoliu@ncepu.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1613-6810,,,36734204,English,SMALL,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000924872700001,2-s2.0-85147438968,China,ncepu.edu.cn,Nanjing Univ;North China Elect Power Univ,"Nanjing Univ, China;North China Elect Power Univ, China","Wu, Yongkang; Li, Xiaoke; Hua, Kang; Duan, Xiao; Ding, Rui; Rui, Zhiyan; Cao, Feng; Yuan, Mengchen; Li, Jia; Liu, Jianguo"
"Zhang, P.Y., Wang, Y.C., You, Y.Z., Yuan, J.Y., Zhou, Z.Y., Sun, S.G.",Generation Pathway of Hydroxyl Radical in Fe/N/C-Based Oxygen Reduction Electrocatalysts under Acidic Media,2021,JOURNAL OF PHYSICAL CHEMISTRY LETTERS,12,32,,7797,7803,7,28,10.1021/acs.jpclett.1c01905,,"[Zhang, Pengyang; Wang, Yucheng; You, Yuzhe; Zhou, Zhiyou; Sun, Shigang] Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China; [Yuan, Jiayin] Stockholm Univ, Dept Mat & Environm Chem, S-10691 Stockholm, Sweden",,"The identification of the generation pathway of (OH)-O-center dot radical during the oxygen reduction reaction (ORR) is critical because it determines which strategy should be adopted to minimize these corrosive species. In this way, researchers can develop a more stable Fe/N/C ORR catalyst or a catalyst layer in the proton exchange membrane fuel cells (PEMFCs). To date, this critical problem has still been unresolved. Herein, the generation of the (OH)-O-center dot radical during the acidic ORR was mimicked by using two known pathways, that is, the Fenton (and Fenton-like) and the electrochemical reduction of H2O2(H2O2-ECR) process. The latter was determined as the main generation pathway of (OH)-O-center dot radical below 30 degrees C. As the temperature surpassed 30 degrees C, the H2O2-ECR process began to lose its dominance because of the appearance of a third so-far unknown generation pathway. This work lays a basis for future development of radical elimination strategies to stabilize a Fe/N/C ORR catalyst or a catalyst layer in PEMFCs.",,IRON-BASED CATALYSTS; HIGH-PERFORMANCE; ORR CATALYST; DEGRADATION,IRON-BASED CATALYSTS;HIGH-PERFORMANCE;ORR CATALYST;DEGRADATION,wangyc@xmu.edu.cn; zhouzy@xmu.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1948-7185,,,34375530,English,J PHYS CHEM LETT,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000687716600019,2-s2.0-85114035926,China;Sweden,xmu.edu.cn,Xiamen Univ;Stockholm Univ,"Xiamen Univ, China;Stockholm Univ, Sweden","Zhang, Pengyang; Wang, Yucheng; You, Yuzhe; Yuan, Jiayin; Zhou, Zhiyou; Sun, Shigang"
"Shi, L., Lin, X.N., Liu, F., Long, Y.D., Cheng, R.Y., Tan, C.H., Yang, L., Hu, C.G., Zhao, S.L., Liu, D.",Geometrically Deformed Iron-Based Single-Atom Catalysts for High-Performance Acidic Proton Exchange Membrane Fuel Cells,2022,ACS CATALYSIS,12,9,,5397,5406,10,81,10.1021/acscatal.2c00915,,"[Shi, Lei; Lin, Xuanni; Liu, Feng; Long, Yongde; Cheng, Ruyi; Yang, Liu; Hu, Chuangang; Liu, Dong] Beijing Univ Chem Technol, Ctr Soft Matter Sci & Engn, State Key Lab Organ Inorgan Composites, Coll Chem Engn, Beijing 100029, Peoples R China; [Shi, Lei; Liu, Feng; Long, Yongde] Beijing Univ Chem Technol, Coll Mat Sci & Engn, Beijing 100029, Peoples R China; [Tan, Chunhui; Zhao, Shenlong] Univ Sydney, Sch Chem & Biomol Engn, Sydney, NSW 2006, Australia",,"Atomically dispersed metal-nitrogen-carbon (M-N-C) catalysts have emerged as the promising alternative to replace platinum-based catalysts for oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). However, their practical applications are restricted by the relatively low intrinsic activity, low utilization rat; and poor stability of atomic metal sites. Herein, we propose a simple but efficient strategy to synthesize a geometrically deformed single Fe site catalyst (d-SA-FeNC) by trace NaCl-coating-assisted pyrolysis of Fe-containing zeolitic imidazolate frameworks. Benefiting from the significantly exposed Fe-N-4 active sites and enhanced mass transport by the hierarchically porous structure, the newly developed catalysts exhibit improved ORR performance in acidic media. Remarkably, the as-constructed membrane electrode assemblies achieve high peak power densities of 0.904 and 0.502 W cm(-2) in H-2-O-2 and H-2-air PEMFCs even at a low catalyst loading of 1 mg cm(-2), respectively, revealing ultrahigh mass activity density. Both experimental and theoretical results reveal that the enhanced intrinsic activity is attributed to the synergy of deformed Fe-N-4 moieties and the surrounding graphitic N dopant. In addition, the locally increased graphitization of the carbon matrix can efficiently reduce carbon corrosion, thereby promoting catalyst stability. This work provides useful guidance for the development of highly efficient ORR catalysts for PEMFCs.",single-atom catalysts; Fe-N-C catalysts; oxygen reduction reaction; proton exchange membrane fuel cells; geometrical deformation,N-C ELECTROCATALYST; OXYGEN-REDUCTION; ACTIVE-SITES; FE/N/C CATALYSTS; MASS ACTIVITY; CARBON; DURABILITY; MORPHOLOGY; ORR,single-atom catalysts;Fe-N-C catalysts;oxygen reduction reaction;proton exchange membrane fuel cells;geometrical deformation;N-C ELECTROCATALYST;OXYGEN-REDUCTION;ACTIVE-SITES;FE/N/C CATALYSTS;MASS ACTIVITY;CARBON;DURABILITY;MORPHOLOGY;ORR,shenlong.zhao@sydney.edu.au; liudong@mail.buct.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2155-5435,,,,English,ACS CATAL,Article,WoS,Chemistry,WOS:000813262300001,2-s2.0-85129543021,China;Australia,sydney.edu.au,Beijing Univ Chem Technol;Univ Sydney,"Beijing Univ Chem Technol, China;Univ Sydney, Australia","Shi, Lei; Lin, Xuanni; Liu, Feng; Long, Yongde; Cheng, Ruyi; Tan, Chunhui; Yang, Liu; Hu, Chuangang; Zhao, Shenlong; Liu, Dong"
"Zhong, J.Q., He, L.J., Yang, Q.X., Duan, X.W., Yang, W.H.",Glucose Doping of a Glc-Fe-ZIF ORR Catalyst for Proton-Exchange Membrane Fuel Cells: Optimising Porous Structures and Improving Performance,2021,CHEMISTRYSELECT,6,6,,1271,1275,5,5,10.1002/slct.202004709,,"[Zhong, Jia-Qiang; He, Li-Juan; Yang, Qing-Xia; Duan, Xin-Wei; Yang, Wei-Hua] Huaqiao Univ, Coll Mat Sci & Engn, Xiamen 361021, Fujian, Peoples R China",,"Great advances have been made in developing Fe/N/C catalyst, which is a potential candidate for replacing the low-platinum group metal catalysts used in proton-exchange membrane fuel cells. Herein, a highly efficient porous structure catalyst was synthesised by doping glucose into the zeolitic imidazolate framework, which obtained numerous pores after high-temperature pyrolysis. The porous carbon structure was conducive to improving mass transport and oxygen reduction reaction (ORR) activities. The Glc-Fe-ZIF catalyst exhibited an excellent ORR activity with a half-wave potential (E-1/2) of 0.874 V (RHE) and the maximum power density reached 0.72 W cm(-2) in acidic medium.",Proton exchange membrane fuel cells; Porous structure; Oxygen reduction reaction; Glc-Fe-ZIF catalyst,,Proton exchange membrane fuel cells;Porous structure;Oxygen reduction reaction;Glc-Fe-ZIF catalyst,yangwh@hqu.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,2365-6549,,,,English,CHEMISTRYSELECT,Article,WoS,Chemistry,WOS:000616638000014,2-s2.0-85101034641,China,hqu.edu.cn,Huaqiao Univ,"Huaqiao Univ, China","Zhong, Jia-Qiang; He, Li-Juan; Yang, Qing-Xia; Duan, Xin-Wei; Yang, Wei-Hua"
"Zhu, W., Shao, Y., Zhou, B., Yin, S., Dong, A., Liu, Y., Liu, X., Li, Z.",Gram-scale production of an Fe single atom catalyst and mass transfer enhancement in PEMFCs,2025,Journal of Materials Chemistry A,13,28,,22406,22413,,0,10.1039/d4ta08289c,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105002148573&doi=10.1039%2Fd4ta08289c&partnerID=40&md5=6ad3fe57af52a0f7f3673a5594db1623,"Ltd., Tianjin, Tianjin, China; Low-carbon Environmental Protection Department, Ltd., Tianjin, Tianjin, China","Zhu, Weikang, Ltd., Tianjin, Tianjin, China, Low-carbon Environmental Protection Department, Ltd., Tianjin, Tianjin, China; Shao, Yuankai, Ltd., Tianjin, Tianjin, China, Low-carbon Environmental Protection Department, Ltd., Tianjin, Tianjin, China; Zhou, Bingjie, Ltd., Tianjin, Tianjin, China, Low-carbon Environmental Protection Department, Ltd., Tianjin, Tianjin, China; Yin, Shuoyao, Ltd., Tianjin, Tianjin, China, Low-carbon Environmental Protection Department, Ltd., Tianjin, Tianjin, China; Dong, Anqi, Ltd., Tianjin, Tianjin, China, Low-carbon Environmental Protection Department, Ltd., Tianjin, Tianjin, China; Liu, Yatao, Ltd., Tianjin, Tianjin, China, Low-carbon Environmental Protection Department, Ltd., Tianjin, Tianjin, China; Liu, Xi, Ltd., Tianjin, Tianjin, China, Low-carbon Environmental Protection Department, Ltd., Tianjin, Tianjin, China; Li, Zhenguo, Ltd., Tianjin, Tianjin, China, Low-carbon Environmental Protection Department, Ltd., Tianjin, Tianjin, China","The huge advantage of the lower fabrication cost for non-Pt catalysts is attracting increasing attention for fuel cell development. As a potential candidate, Fe single atom (SA) catalysts exhibit remarkable catalytic activity for the oxygen reduction reaction. However, due to the relatively low intrinsic activity, high active site density and an optimized mass transfer path are particularly required for Fe-SA proton exchange membrane fuel cells (PEMFCs). Herein, a Fe-SA catalyst with abundant heteroatoms and a large specific surface area is synthesized based on a lab-made ZIF-derived carbon support via a simple adsorption-annealing method. Benefitting from the advanced carbon support, plenty of Fe atoms can be adsorbed and anchored on the surface of the carbon particles. After careful modulation of the annealing temperature, highly dispersed Fe single atom active sites can be obtained, leading to good catalytic activity (the half-wave potential is more than 0.827 V versus RHE). Furthermore, coordinated with the structure optimization of the gas diffusion layer, the maximum power density can be improved to 803 mW cm−2, indicating the application potential of this catalyst in PEMFCs. This work not only obtains an advanced Fe-SA ORR catalyst but also provides a demonstration for the research and development of non-Pt fuel cell catalysts. © 2025 The Royal Society of Chemistry.",,Annealing; Bioremediation; Coordination reactions; Oxygen reduction reaction; Platinum; Structural optimization; Thermal diffusion in gases; Carbon support; Fabrication cost; Fuel cell development; Gram scale; Mass transfer enhancement; Proton-exchange membranes fuel cells; Pt catalysts; Single-atoms; ]+ catalyst; Electrolytic reduction,Annealing;Bioremediation;Coordination reactions;Oxygen reduction reaction;Platinum;Structural optimization;Thermal diffusion in gases;Carbon support;Fabrication cost;Fuel cell development;Gram scale;Mass transfer enhancement;Proton-exchange membranes fuel cells;Pt catalysts;Single-atoms;]+ catalyst;Electrolytic reduction,"W. Zhu; National Engineering Laboratory for Mobile Source Emission Control Technology, China Automotive Technology & Research Center Co., Ltd, Tianjin, 300300, China; email: zhuweikang@catarc.ac.cn; Z. Li; National Engineering Laboratory for Mobile Source Emission Control Technology, China Automotive Technology & Research Center Co., Ltd, Tianjin, 300300, China; email: lizhenguo@catarc.ac.cn",,,,,,Royal Society of Chemistry,20507488,,JMCAE,,English,J. Mater. Chem. A,Article,Scopus,,2-s2.0-105002148573,,China,catarc.ac.cn,,,"Zhu, W.; Shao, Y.; Zhou, B.; Yin, S.; Dong, A.; Liu, Y.; Liu, X.; Li, Z."
"Mufundirwa, A., Harrington, G.F., Ismail, M.S., Smid, B., Cunning, B.V., Shundo, Y., Pourkashanian, M., Sasaki, K., Hayashi, A., Lyth, S.M.",Gram-scale synthesis of alkoxide-derived nitrogen-doped carbon foam as a support for Fe-N-C electrocatalysts,2020,NANOTECHNOLOGY,31,22,225401,,,13,5,10.1088/1361-6528/ab76ed,,"[Mufundirwa, Albert; Sasaki, Kazunari; Hayashi, Akari] Kyushu Univ, Dept Hydrogen Energy Syst, Fac Engn, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan; [Harrington, George F.; Sasaki, Kazunari] Kyushu Univ, Next Generat Fuel Cell Res Ctr NEXT FC, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan; [Ismail, Mohammed S.; Pourkashanian, Mohamed; Lyth, Stephen M.] Univ Sheffield, Dept Mech Engn, Fac Engn, Energy2050, Ella Armitage Bldg, Sheffield S3 7RD, S Yorkshire, England; [Smid, Bretislav; Cunning, Benjamin, V; Shundo, Yu; Sasaki, Kazunari; Lyth, Stephen M.] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan; [Smid, Bretislav] Charles Univ Prague, Fac Math & Phys, Dept Surface & Plasma Sci, V Holesovickach 2, CR-18000 Prague, Czech Republic; [Cunning, Benjamin, V] UNIST, Ctr Multidimens Carbon Mat, Ulsan 89798, South Korea; [Hayashi, Akari; Lyth, Stephen M.] Kyushu Univ, Platform Inter Transdisciplinary Energy Res, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan",,"Non-platinum group metal (non-PGM) catalysts for the oxygen reduction reaction (ORR) are set to reduce the cost of polymer electrolyte membrane fuel cells (PEFCs) by replacing platinum at the cathode. We previously developed unique nitrogen-doped carbon foams by template-free pyrolysis of alkoxide powders synthesized using a high temperature and high pressure solvothermal reaction. These were shown to be effective ORR electrocatalysts in alkaline media. Here, we present a new optimised synthesis protocol which is carried out at ambient temperature and pressure, enabling us to safely increase the batch size to 2 g, increase the yield by 60%, increase the specific surface area to 1866 m(2) g(-1), and control the nitrogen content (between 1.0 and 5.2 at%). These optimized nitrogen-doped carbon foams are then utilized as effective supports for Fe-N-C catalysts for the ORR in acid media, whilst multiphysics modelling is used to gain insight into the electrochemical performance. This work highlights the importance of the properties of the carbon support in the design of Pt-free electrocatalysts.",oxygen reduction reaction; ORR; non-PGM; nitrogen-doped carbon; Pt-free; catalyst support; template-free,OXYGEN-REDUCTION REACTION; METAL-FREE; SOLVOTHERMAL SYNTHESIS; GRAPHENE FOAM; CATALYSTS; IRON; PERFORMANCE; DURABILITY; SITES,oxygen reduction reaction;ORR;non-PGM;nitrogen-doped carbon;Pt-free;catalyst support;template-free;OXYGEN-REDUCTION REACTION;METAL-FREE;SOLVOTHERMAL SYNTHESIS;GRAPHENE FOAM;CATALYSTS;IRON;PERFORMANCE;DURABILITY;SITES,lyth@i2cner.kyushu-u.ac.jp,,"TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND",,,,IOP PUBLISHING LTD,0957-4484,,,32066126,English,NANOTECHNOLOGY,Article,WoS,Science & Technology - Other Topics; Materials Science; Physics,WOS:000521475900001,2-s2.0-85082094741,Japan;United Kingdom;Czech Republic;South Korea,i2cner.kyushu-u.ac.jp,Kyushu Univ;Univ Sheffield;Charles Univ Prague;UNIST,"Kyushu Univ, Japan;Univ Sheffield, United Kingdom;Charles Univ Prague, Czech Republic;UNIST, South Korea","Mufundirwa, Albert; Harrington, George F.; Ismail, Mohammed S.; Smid, Bretislav; Cunning, Benjamin, V; Shundo, Yu; Pourkashanian, Mohamed; Sasaki, Kazunari; Hayashi, Akari; Lyth, Stephen M."
"Arbizzani, C., Righi, S., Soavi, F., Mastragostino, M.",Graphene and carbon nanotube structures supported on mesoporous xerogel carbon as catalysts for oxygen reduction reaction in proton-exchange-membrane fuel cells,2011,INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,36,8,,5038,5046,9,53,10.1016/j.ijhydene.2011.01.083,,"[Arbizzani, Catia; Righi, Sara; Soavi, Francesca; Mastragostino, Marina] Univ Bologna, Dipartimento Sci Met Elettrochim & Tecn Chim, I-40127 Bologna, Italy",,"Non-precious metal catalysts for the oxygen reduction reaction (ORR) in proton-exchange-membrane fuel cells (PEMFCs) were obtained by pyrolysis of iron citrate and polyacrylonitrile on mesoporous xerogel carbon support. Chemical-physical characterizations, electrochemical studies by the rotating disc electrode, and electrochemical tests in a PEMFC configuration demonstrated that the porosity of the pristine carbon promotes the formation of graphene and carbon nanotube structures featuring ORR catalytic activity. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.",Oxygen reduction reaction; PEM fuel cells; Non-precious metal catalysts; Xerogel carbon support; Graphene; Carbon nanotubes,,Oxygen reduction reaction;PEM fuel cells;Non-precious metal catalysts;Xerogel carbon support;Graphene;Carbon nanotubes,catia.arbizzani@unibo.it; francesca.soavi@unibo.it; marina.mastragostino@unibo.it,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0360-3199,,,,English,INT J HYDROGEN ENERG,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels,WOS:000290072300043,2-s2.0-79953651340,Italy,unibo.it,Univ Bologna,"Univ Bologna, Italy","Arbizzani, Catia; Righi, Sara; Soavi, Francesca; Mastragostino, Marina"
"Byon, H.R., Suntivich, J., Shao-Horn, Y.",Graphene-Based Non-Noble-Metal Catalysts for Oxygen Reduction Reaction in Acid,2011,CHEMISTRY OF MATERIALS,23,15,,3421,3428,8,458,10.1021/cm2000649,,"[Byon, Hye Ryung; Shao-Horn, Yang] MIT, Dept Mech Engn, Cambridge, MA 02139 USA; [Byon, Hye Ryung; Suntivich, Jin; Shao-Horn, Yang] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA; [Byon, Hye Ryung; Suntivich, Jin; Shao-Horn, Yang] MIT, Electrochem Energy Lab, Cambridge, MA 02139 USA",,"Non-noble-metal catalysts based on Fe-N-C moieties have shown promising oxygen reduction reaction (ORR) activity in proton exchange membrane fuel cells (PEMFCs). In this study, we report a facile method to prepare a Fe-N-C catalyst based on modified graphene (Fe-N-rGO) from heat treatment of a mixture of Fe salt, graphitic carbon nitride (g-C3N4), and chemically reduced graphene (rGO). The Fe-N-rGO catalyst was found to have pyridinic N-dominant heterocyclic N (40% atomic concentration among all N components) on the surface and have an average Fe coordination of similar to 3 N (Fe-N-3,N-average) in bulk. Rotating disk electrode measurements revealed that Fe-N-rGO had high mass activity in acid and exhibited high stability at 0.5 V at 80 degrees C in acid over 70 h, which was correlated to low H2O2 production shown from rotating ring disk electrode measurements.",non-noble-metal catalyst; graphene; Fe-N; oxygen reduction reaction; proton exchange membrane fuel cell,PEM FUEL-CELLS; FE-BASED CATALYSTS; HIGH-AREA CARBON; EXFOLIATED GRAPHITE OXIDE; ACTIVE-SITES; HYDRAZINE-REDUCTION; AQUEOUS DISPERSIONS; DISK ELECTRODE; DOPED GRAPHENE; HEAT-TREATMENT,non-noble-metal catalyst;graphene;Fe-N;oxygen reduction reaction;proton exchange membrane fuel cell;PEM FUEL-CELLS;FE-BASED CATALYSTS;HIGH-AREA CARBON;EXFOLIATED GRAPHITE OXIDE;ACTIVE-SITES;HYDRAZINE-REDUCTION;AQUEOUS DISPERSIONS;DISK ELECTRODE;DOPED GRAPHENE;HEAT-TREATMENT,shaohorn@mit.edu,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,0897-4756,,,,English,CHEM MATER,Article,WoS,Chemistry; Materials Science,WOS:000293357100006,2-s2.0-79961061007,United States,mit.edu,MIT,"MIT, United States","Byon, Hye Ryung; Suntivich, Jin; Shao-Horn, Yang"
"Yang, Z.Y., Qian, S.T., Wang, Y.H., Zhang, Y., Zhi, R.X., Chen, X.F., Yang, J., Yang, Z.K., Wang, J.Y., Wang, Y.C., Luo, Q.Q., Wang, J.Z.",Graphene benefits penta-nitrogen coordinated iron and catalytic stability of oxygen reduction reaction,2024,CHEMICAL ENGINEERING JOURNAL,496,,154141,,,9,5,10.1016/j.cej.2024.154141,,"[Yang, Zhiyuan; Qian, Shiting; Zhang, Yan; Zhi, Ruoxuan; Chen, Xifan; Yang, Jia; Yang, Zhengkun; Luo, Qiquan; Wang, Junzhong] Anhui Univ, Inst Phys Sci & Informat Technol, Anhui Graphene Carbon Fiber Res Ctr, Hefei 230601, Peoples R China; [Wang, Junying] Chinese Acad Sci, Inst Coal Chem, Shanxi Key Lab Carbon Mat, Taiyuan 030001, Peoples R China; [Wang, Youheng; Wang, Yucheng] Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China",,"Metal-nitrogen-carbon catalytic material, generally thought as a promising low-cost electrocatalyst of oxygen reduction reaction (ORR), surfers from long-term catalytic durability for fuel cell and metal-air battery. Here, we describe an approach of synthesizing electrochemically exfoliated graphene supported penta-nitrogen coordinated iron exhibiting encouraging ORR catalytic activity and durability. The synthesized catalyst exhibits high half-wave potentials in alkaline medium (E-1/2 0.940 V) enabling high-performance zinc-air battery and in acidic condition for durable fuel cell with a high peak power density (630 mW cm(-2)). The current density of a proton exchange membrane fuel cell loading the catalyst as cathode tends to decay little after initial hours under H-2-air measurement, remarkably inhibiting commonly decline tendency of iron-nitrogen-carbon catalysts. DFT calculation combined with extensive experimental investigations demonstrate that penta-nitrogen coordinated iron supported by graphene is thermodynamically stable, and thus benefits the catalytic stability of ORR.",Graphene; Electrocatalysis; Iron single atom; Oxygen reduction reaction; Fuel cells,N-C CATALYSTS; ACTIVE-SITES; FUEL-CELLS; MEMBRANE,Graphene;Electrocatalysis;Iron single atom;Oxygen reduction reaction;Fuel cells;N-C CATALYSTS;ACTIVE-SITES;FUEL-CELLS;MEMBRANE,wangjy@sxicc.ac.cn; wangyc@xmu.edu.cn; qluo@ahu.edu.cn; wangjz@ahu.edu.cn,,"PO BOX 564, 1001 LAUSANNE, SWITZERLAND",,,,ELSEVIER SCIENCE SA,1385-8947,,,,English,CHEM ENG J,Article,WoS,Engineering,WOS:001284349200001,2-s2.0-85199776599,China,sxicc.ac.cn,Anhui Univ;Chinese Acad Sci;Xiamen Univ,"Anhui Univ, China;Chinese Acad Sci, China;Xiamen Univ, China","Yang, Zhiyuan; Qian, Shiting; Wang, Youheng; Zhang, Yan; Zhi, Ruoxuan; Chen, Xifan; Yang, Jia; Yang, Zhengkun; Wang, Junying; Wang, Yucheng; Luo, Qiquan; Wang, Junzhong"
"Li, S., Li, P., Zhao, W., Kang, H., Pan, M.",Graphene-supported Fe-N/C composite catalyst for oxygen reduction,2015,Gaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities,36,9,,1737,1742,,1,10.7503/cjcu20150232,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84944396955&doi=10.7503%2Fcjcu20150232&partnerID=40&md5=8b488530a4a750cc82ff67b150afd1e9,"State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology, Wuhan, Hubei, China","Li, Shang, State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology, Wuhan, Hubei, China; Li, Pei, State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology, Wuhan, Hubei, China; Zhao, Wei, State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology, Wuhan, Hubei, China; Kang, Huan, State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology, Wuhan, Hubei, China; Pan, Mu, State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology, Wuhan, Hubei, China","NG/Fe-N/C composite catalysts with sandwich nanostructure were synthesized by an impregnation method using polypyrrole as ligand. Nitrogen-doped graphene was doped into the Fe-N/C catalyst during the process of synthesis. By the synergistic reaction between graphene and Fe-N/C, the catalytic activity and stability of catalyst were improved. XRD, SEM, TEM and XPS were used to character the physical structure, morphology and chemical composite of catalysts. The results show that the catalyst has the optimal oxyen reductive reaction (ORR) activity when the mass ratio of grapheme to BP2000 is 1:4 and the heat treatment temperature is 800 ℃. The accelerated aging test (AAT) test shows that catalyst NG/Fe-N/C-25 is more stable than commercial 20% Pt/C catalyst in acidic medium. The total N content of NG/Fe-N/C-25 catalyst is about 5.17%, and the content of graphite nitrogen and pyridine nitrogen are about 44.35% and 32.66%, respectively. These high content of graphitic nitrogen and pyridine nitrogen may result in the high ORR activity and stability. ©, 2015, Higher Education Press. All right reserved.",Nitrogen-doped graphene; Oxygen reductive reaction; Polypyrrole; Proton exchange membrane fuel cell; Sandwich nanostructural NG/Fe-N/C composite catalyst; Stability,Convergence of numerical methods; Doping (additives); Electrolytic reduction; Graphene; Nanocatalysts; Nitrogen; Oxygen; Oxygen reduction reaction; Polypyrroles; Proton exchange membrane fuel cells (PEMFC); Pyridine; Testing; Accelerated aging test; Composite catalysts; Heat treatment temperature; Impregnation methods; Nitrogen doped graphene; Physical structures; Pyridine nitrogen; Synergistic reactions; Catalyst activity,Nitrogen-doped graphene;Oxygen reductive reaction;Polypyrrole;Proton exchange membrane fuel cell;Sandwich nanostructural NG/Fe-N/C composite catalyst;Stability;Convergence of numerical methods;Doping (additives);Electrolytic reduction;Graphene;Nanocatalysts;Nitrogen;Oxygen;Oxygen reduction reaction;Polypyrroles;Proton exchange membrane fuel cells (PEMFC);Pyridine;Testing;Accelerated aging test;Composite catalysts;Heat treatment temperature;Impregnation methods;Nitrogen doped graphene;Physical structures;Pyridine nitrogen;Synergistic reactions;Catalyst activity,"S. Li; State Key Laboratory of Advanced Technology for Materials Synthesis and Progressing, Key Laboratory of Hubei Province for Fuel Cell, Wuhan University of Technology, Wuhan, 430070, China; email: lishang@whut.edu.cn",,,,,,Higher Education Press Limited Company,02510790,,KTHPD,,Chinese,Gaodeng Xuexiao Huaxue Xuebao,Article,Scopus,,2-s2.0-84944396955,,China,whut.edu.cn,,,"Li, S.; Li, P.; Zhao, W.; Kang, H.; Pan, M."
"Wang, T., Wang, J., Wang, X., Yang, J., Liu, J., Xu, H.",Graphene-templated synthesis of sandwich-like porous carbon nanosheets for efficient oxygen reduction reaction in both alkaline and acidic media; 石墨烯模板法制备类似三明治结构的多孔碳纳米片用于高效催化酸/碱性条件下氧还原反应的研究,2018,Science China Materials,61,7,,915,925,,22,10.1007/s40843-017-9191-5,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85045067098&doi=10.1007%2Fs40843-017-9191-5&partnerID=40&md5=e4da751859d7036fa6e26312fa250007,"Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, China; College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu, China","Wang, Tao, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Wang, Jianyu, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu, China; Wang, Xu, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Yang, Jia, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Liu, Jianguo, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu, China; Xu, Hangxun, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, China","Developing low-cost, high-performance electrocatalysts for the oxygen reduction reaction (ORR) is crucial for implementation of fuel cells and metal-air batteries into practical applications. Graphene-based catalysts have been extensively investigated for ORR in alkaline electrolytes. However, their performance in acidic electrolytes still requires further improvement compared to the Pt/C catalyst. Here we report a self-templating approach to prepare graphene-based sandwich-like porous carbon nanosheets for efficient ORR in both alkaline and acidic electrolytes. Graphene oxides were first used to adsorb m-phenylenediamine molecules which can form a nitrogen-rich polymer network after oxidative polymerization. Then iron (Fe) salt was introduced into the polymer network and transformed into ORR active Fe–N–C sites along with Fe, FeS, and FeN<inf>0.05</inf> nanoparticles after pyrolysis, generating ORR active sandwich-like carbon nanosheets. Due to the presence of multiple ORR active sites. The as-obtained catalyst exhibited prominent ORR activity with a half-wave potential ∼30 mV more positive than Pt/C in 0.1 mol L−1 KOH, while the half-wave potential of the catalyst was only ∼40 mV lower than that of commercial Pt/C in 0.1 mol L−1 HClO<inf>4</inf>. The unique planar sandwich-like structure could expose abundant active sites for ORR. Meanwhile, the graphene layer and porous structure could simultaneously enhance electrical conductivity and facilitate mass transport. The prominent electrocatalytic activity and durability in both alkaline and acidic electrolytes indicate that these carbon nanosheets hold great potential as alternatives to precious metal-based catalysts, as demonstrated in zinc-air batteries and proton exchange membrane fuel cells. © 2018, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.",fuel cells; nanosheets; oxygen reduction reaction; porous carbon; zinc-air batteries,Catalyst activity; Electrocatalysts; Electrolytic reduction; Fuel cells; Gas fuel purification; Graphene; Iron compounds; Nanosheets; Oxygen; Porous materials; Potassium hydroxide; Proton exchange membrane fuel cells (PEMFC); Secondary batteries; Alkaline electrolytes; Electrical conductivity; Electrocatalytic activity; Oxidative polymerization; Oxygen reduction reaction; Porous carbons; Sandwich-like structure; Zinc-air battery; Solid electrolytes,fuel cells;nanosheets;oxygen reduction reaction;porous carbon;zinc-air batteries;Catalyst activity;Electrocatalysts;Electrolytic reduction;Gas fuel purification;Graphene;Iron compounds;Oxygen;Porous materials;Potassium hydroxide;Proton exchange membrane fuel cells (PEMFC);Secondary batteries;Alkaline electrolytes;Electrical conductivity;Electrocatalytic activity;Oxidative polymerization;Porous carbons;Sandwich-like structure;Zinc-air battery;Solid electrolytes,"H. Xu; CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, 230026, China; email: hxu@ustc.edu.cn",,,,,,Science China Press,20958226,,,,English,Sci. China Mater.,Article,Scopus,,2-s2.0-85045067098,,China,ustc.edu.cn,,,"Wang, T.; Wang, J.; Wang, X.; Yang, J.; Liu, J.; Xu, H."
"Bhange, S.N., Unni, S.M., Kurungot, S.",Graphene with Fe and S Coordinated Active Centers: An Active Competitor for the Fe-N-C Active Center for Oxygen Reduction Reaction in Acidic and Basic pH Conditions,2018,ACS APPLIED ENERGY MATERIALS,1,2,,368,376,17,40,10.1021/acsaem.7b00053,,"[Bhange, Siddheshwar N.; Kurungot, Sreekumar] Natl Chem Lab, CSIR, Phys & Mat Chem Div, Pune 411008, Maharashtra, India; [Bhange, Siddheshwar N.; Kurungot, Sreekumar] Acad Sci & Innovat Res AcSIR, CSIR NCL Campus, Pune 411008, Maharashtra, India; [Unni, Sreekuttan M.] Cent Electrochem Res Inst CECRI, Madras Unit, CSIR Madras Complex, Chennai 600113, Tamil Nadu, India",,"Proton exchange membrane fuel cells (PEMFCs) and metal-air batteries are gaining enormous attention due to their capability to fulfill the energy demand of the ever increasing population. Because the major bottleneck in the forward path of commercialization of such systems is mainly caused by the precious metal catalysts, there has been a paradigm shift in the development of Pt-free electrocatalysts to make the PEMFC systems cost competitive. Here, we report a Pt-free, iron and sulfur-doped, scrolled graphene (P12-900) prepared via annealing of polyethylenedioxythiophene (PEDOT) as a potential oxygen reduction electrocatalyst which could perform exceptionally well under acidic and basic electrolyte conditions. The residual iron chloride retained by the polymer matrix, which was employed as the oxidizing agent for the polymerization reaction, plays a vital role in generating the potential oxygen reduction reaction (ORR) active sites based on the iron and sulfur-doped graphene in the system. The composition designated as P12-900 displays ORR activitiy with substantially reduced overpotential in both acidic and basic electrolyte conditions, which is a unique feature reported in this class of materials. In the basic medium, P12-900 displays ORR activity which is similar to that for the performance of 40 wt % Pt/C, whereas, under acidic conditions, the in-house system displays only an 80 mV overpotential in the onset potential compared to its Pt counterpart. Single cell demonstration of a Nafion based PEMFC by employing the P12-900 catalyst as a cathode delivered the maximum power density (PD) of 345 mW/cm(2) at 60 degrees C without applying any back pressure. Equally, when tested as the air electrode for a zinc-air battery with KOH electrolyte, the cell displayed a maximum power density of 320 mW/cm(2) and a maximum current density of 685 mA/cm(2), which are comparable to the performance of the system based on the state-of-the-art Pt/C, (322 mW/cm(2) and 649 mA/cm(2) respectively) cathode. Thus, the prepared precious-metal-free catalyst performs as a promising candidate for the replacement of a noble metal catalyst for PEMFCs and zinc-air battery systems with its unique capability to facilitate the electrode reactions under acidic and basic electrolyte conditions.",S-doped graphene; oxygen reduction reaction; electrocatalyst; fuel cell; zinc-air battery,DENSITY-FUNCTIONAL-THEORY; CARBON NANOTUBE ARRAYS; PEM FUEL-CELL; CATHODE CATALYST; GRAPHITIC CARBON; DOPED GRAPHENE; NITROGEN; ELECTROCATALYSTS; PERFORMANCE; ALKALINE,S-doped graphene;oxygen reduction reaction;electrocatalyst;fuel cell;zinc-air battery;DENSITY-FUNCTIONAL-THEORY;CARBON NANOTUBE ARRAYS;PEM FUEL-CELL;CATHODE CATALYST;GRAPHITIC CARBON;DOPED GRAPHENE;NITROGEN;ELECTROCATALYSTS;PERFORMANCE;ALKALINE,k.sreekumar@ncl.res.in,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2574-0962,,,,English,ACS APPL ENERG MATER,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000458705100022,2-s2.0-85059692029,India,ncl.res.in,Natl Chem Lab;Acad Sci & Innovat Res AcSIR;Cent Electrochem Res Inst CECRI,"Natl Chem Lab, India;Acad Sci & Innovat Res AcSIR, India;Cent Electrochem Res Inst CECRI, India","Bhange, Siddheshwar N.; Unni, Sreekuttan M.; Kurungot, Sreekumar"
"Fu, X.G., Jin, J.T., Liu, Y.R., Liu, Q., Niu, K.X., Zhang, J.Y., Cao, X.P.",Graphene-xerogel-based non-precious metal catalyst for oxygen reduction reaction,2013,ELECTROCHEMISTRY COMMUNICATIONS,28,,,5,8,4,27,10.1016/j.elecom.2012.11.017,,"[Fu, Xiaogang; Jin, Jutao; Liu, Yanru; Liu, Qiao; Niu, Kexing; Zhang, Junyan] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China; [Fu, Xiaogang; Liu, Yanru; Cao, Xiaoping] Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China; [Fu, Xiaogang; Liu, Yanru; Cao, Xiaoping] Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China",,"Graphene-xerogel-based Co-N cathode catalyst (Co-N-GX) for the oxygen reduction reaction (ORR) was prepared through a simple approach. The Co-N-GX shows a more positive onset potential, higher cathodic density for the ORR in alkaline media than graphene-sheet-based Co-N catalyst (Co-N-GS), highlighting the importance of high specific surface area for improving the ORR performance. The proposed approach makes the Co-N-GX catalyst a non-precious metal cathode catalyst for fuel cells. (c) 2012 Elsevier B.V. All rights reserved.",Graphene xerogel; Electrocatalysts; Oxygen reduction reaction,NITROGEN-DOPED GRAPHENE; PEM FUEL-CELLS; ELECTROCATALYSTS; OXIDE; ACID,Graphene xerogel;Electrocatalysts;Oxygen reduction reaction;NITROGEN-DOPED GRAPHENE;PEM FUEL-CELLS;OXIDE;ACID,zhangjunyan@licp.cas.cn; caoxplzu@163.com,,"360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA",,,,ELSEVIER SCIENCE INC,1388-2481,,,,English,ELECTROCHEM COMMUN,Article,WoS,Electrochemistry,WOS:000315554400002,,China,licp.cas.cn,Chinese Acad Sci;Lanzhou Univ,"Chinese Acad Sci, China;Lanzhou Univ, China","Fu, Xiaogang; Jin, Jutao; Liu, Yanru; Liu, Qiao; Niu, Kexing; Zhang, Junyan; Cao, Xiaoping"
"Ravichandran, B., Zhang, W., Liu, H., Khotseng, L., Su, H.","Graphitic carbon nitride (g-C3N4) in fuel cells: A comprehensive review of synthesis, functionalization, and multifaceted electrocatalytic roles",2025,Journal of Alloys and Compounds,1042,,183989,,,,0,10.1016/j.jallcom.2025.183989,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105016779884&doi=10.1016%2Fj.jallcom.2025.183989&partnerID=40&md5=07cb75adc7aed2464b2af8ea032ca13d,"Jiangsu University, Zhenjiang, Jiangsu, China; University of the Western Cape, Bellville, Western Cape, South Africa","Ravichandran, Balamurali, Jiangsu University, Zhenjiang, Jiangsu, China; Zhang, Weiqi, Jiangsu University, Zhenjiang, Jiangsu, China; Liu, Huiyuan, Jiangsu University, Zhenjiang, Jiangsu, China; Khotseng, Lindiwe Eudora, University of the Western Cape, Bellville, Western Cape, South Africa; Su, Huaneng, Jiangsu University, Zhenjiang, Jiangsu, China","The commercialization of fuel cells hinges on developing low-cost, durable, platinum-group-metal (PGM)-free electrocatalysts. Graphitic carbon nitride (g-C<inf>3</inf>N<inf>4</inf>), an earth-abundant polymeric semiconductor, is a promising alternative due to its stability and tunable electronic structure. This review highlights the evolution of g-C<inf>3</inf>N<inf>4</inf> from a material with inherent limitations, such as poor conductivity and low surface area, to a versatile platform for high-performance fuel cell components. We summarize key engineering strategies that overcome these drawbacks, including morphological control, electronic structure modulation via doping and defect engineering, and the formation of synergistic composites. Critically, this work provides a unique and holistic perspective by categorizing the distinct and synergistic electrocatalytic roles of engineered g- C<inf>3</inf>N<inf>4</inf>: (i) as a robust catalyst support superior to conventional carbons, (ii) as a potent metal-free catalyst for the oxygen reduction reaction (ORR), (iii) as an ideal scaffold for single-atom catalysts (SACs), and (iv) as a functional membrane additive. Despite significant progress, with performance rivaling platinum in alkaline media, major challenges persist. These include improving activity and stability in acidic environments (e.g. PEMFC) and developing scalable, cost-effective synthesis methods. This work consolidates the current state-of-the-art and outlines future research directions, including the use of advanced characterization and machine learning-assisted design, to realize the full potential of g-C<inf>3</inf>N<inf>4</inf> for a sustainable energy future. © 2025 Elsevier B.V.",Electrocatalysis; Fuel cells; Graphitic carbon nitride (g-C3N4); Oxygen reduction reaction (ORR); Single-atom catalysts (SACs),Carbon nitride; Catalyst supports; Cost effectiveness; Electrocatalysts; Electronic structure; Engineering education; Engineering research; Gas fuel purification; Oxygen reduction reaction; Platinum; Proton exchange membrane fuel cells (PEMFC); Scaffolds (biology); Semiconductor doping; Electrocatalytic; Electronic.structure; Functionalizations; Graphitic carbon nitride (g-C3N4); Graphitic carbon nitrides; Single-atom catalyst; Single-atoms; ]+ catalyst; Electrolytic reduction,Electrocatalysis;Fuel cells;Graphitic carbon nitride (g-C3N4);Oxygen reduction reaction (ORR);Single-atom catalysts (SACs);Carbon nitride;Catalyst supports;Cost effectiveness;Electrocatalysts;Electronic structure;Engineering education;Engineering research;Gas fuel purification;Oxygen reduction reaction;Platinum;Proton exchange membrane fuel cells (PEMFC);Scaffolds (biology);Semiconductor doping;Electrocatalytic;Electronic.structure;Functionalizations;Graphitic carbon nitrides;Single-atom catalyst;Single-atoms;]+ catalyst;Electrolytic reduction,"H. Su; Institute for Energy Research, Jiangsu University, Zhenjiang, 301 Xuefu Road, 212013, China; email: suhuaneng@ujs.edu.cn",,,,,,Elsevier Ltd,09258388,,JALCE,,English,J Alloys Compd,Review,Scopus,,2-s2.0-105016779884,,China;South Africa,ujs.edu.cn,,,"Ravichandran, B.; Zhang, W.; Liu, H.; Khotseng, L.; Su, H."
"Bonakdarpour, A., Dahn, T.R., Atanasoski, R.T., Debe, M.K., Dahn, J.R.",H2O2 release during oxygen reduction reaction on Pt nanoparticles,2008,ELECTROCHEMICAL AND SOLID STATE LETTERS,11,11,,B208,B211,4,86,10.1149/1.2978090,,"[Bonakdarpour, Arman; Dahn, Tara R.; Dahn, J. R.] Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 3J5, Canada; [Atanasoski, R. T.; Debe, M. K.] 3M Co, Fuel Cell Components Program, St Paul, MN 55144 USA",,"The impact of 3M's nanostructured thin film electrocatalyst loading on rotating ring-disk electrode (RRDE) experiments for the oxygen reduction reaction (ORR) in a 0.1 M HClO(4) solution has been studied. The electrocatalysts were prepared by sputtering Pt onto support whiskers and have been reported to exhibit one of the best specific activities of any ORR catalyst thus far. However, a dramatic increase in H(2)O(2) release was observed as the catalyst loading (number of catalyzed whiskers per unit area) on the glassy carbon tip of RRDE was decreased below 20 mu g cm(-2), confirming some earlier observations reported by our group and other research groups with some other types of catalysts. These observations suggest that oxygen reduction occurs through a H(2)O(2) intermediate, and if the catalyst nanoparticles are sparsely distributed, the produced H(2)O(2) cannot be efficiently reduced to H(2)O before it escapes. Similar observations have been made for Se/Ru/C and Fe-N-C catalysts. (C) 2008 The Electrochemical Society.",,ROTATING-RING-DISK; PEM FUEL-CELLS; THIN-FILM; HYDROGEN-PEROXIDE; ELECTROCATALYSTS; CATALYSTS; ELECTRODE; TRENDS; IMPACT; FE,ROTATING-RING-DISK;PEM FUEL-CELLS;THIN-FILM;HYDROGEN-PEROXIDE;ELECTROCATALYSTS;CATALYSTS;ELECTRODE;TRENDS;IMPACT;FE,arman@chml.ubc.ca,,"65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA",,,,ELECTROCHEMICAL SOC INC,1099-0062,,,,English,ELECTROCHEM SOLID ST,Article,WoS,Electrochemistry; Materials Science,WOS:000259188600013,,Canada;United States,chml.ubc.ca,Dalhousie Univ;3M Co,"Dalhousie Univ, Canada;3M Co, United States","Bonakdarpour, Arman; Dahn, Tara R.; Atanasoski, R. T.; Debe, M. K.; Dahn, J. R."
"Li, S., Zhang, L., Liu, H., Pan, M., Ling, L., Zhang, J.",Heat-treated cobalt-tripyridyl triazine (Co-TPTZ) electrocatalysts for oxygen reduction reaction in acidic medium,2010,Electrochimica Acta,55,15,,4403,4411,,74,10.1016/j.electacta.2010.01.090,https://www.scopus.com/inward/record.uri?eid=2-s2.0-77950810291&doi=10.1016%2Fj.electacta.2010.01.090&partnerID=40&md5=2215625cde7dd1e3042afa3b50b71887,"Institute for Fuel Cell Innovation, National Research Council Canada, Ottawa, ON, Canada; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan, Hubei, China; College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, China","Li, Shang, Institute for Fuel Cell Innovation, National Research Council Canada, Ottawa, ON, Canada, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan, Hubei, China; Zhang, Lei, Institute for Fuel Cell Innovation, National Research Council Canada, Ottawa, ON, Canada; Liu, Hansan, Institute for Fuel Cell Innovation, National Research Council Canada, Ottawa, ON, Canada; Pan, Mu, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan, Hubei, China; Ling, Ling, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, China; Zhang, Jiujun, Institute for Fuel Cell Innovation, National Research Council Canada, Ottawa, ON, Canada","In this paper, carbon-supported cobalt-tripyridyl triazine (Co-TPTZ) complexes were synthesized by a simple chemical method, then heat-treated at 600, 700, 800, and 900 °C to optimize their activity for the oxygen reduction reaction (ORR). The resulting catalysts (Co-N/C) all showed strong catalytic activity toward the ORR, but the catalyst heat-treated at 700 °C yielded the best ORR activity. Co-N/C catalysts with several Co loadings - 0.64, 2.0, 2.96, 3.33, 5.28, and 7.18 wt% - were also synthesized and tested for ORR activity. X-ray diffraction and energy dispersive X-ray analysis were used to characterize these catalysts in terms of their structure and composition. To achieve further quantitative evaluation of the catalysts in terms of their ORR kinetics and mechanism, rotating disk electrode and rotating ring-disk electrode techniques were used with the Koutecky-Levich theory to obtain several important kinetic parameters: overall ORR electron transfer number, electron transfer coefficiency in the rate-determining step (RDS), chemical reaction rate constant, electron transfer rate constant in the RDS, exchange current density, and mole percentage of H<inf>2</inf>O<inf>2</inf> produced in the catalyzed ORR. The overall electron transfer number for the catalyzed ORR was determined to be ∼3.5 with 14% H<inf>2</inf>O<inf>2</inf> production, suggesting that the ORR catalyzed by Co-N/C catalysts is a mixture of 2- and 4-electron transfer pathways, dominated by a 4-electron transfer process; based on these measurements, an ORR mechanism is proposed based on the literature and our understanding, to facilitate further investigation. The stability of a Co-N/C catalyst was also tested by fixing a current density to record the change in electrode potential with time. For comparison, two other catalysts, Fe-N/C and TPTZ/C, were also tested for stability under the same conditions as the Co-N/C catalyst. Among these three, the 5 wt% Co-N/C was most stable. Crown Copyright © 2010.","2,4,6-Tris(2-pyridyl)-1,3,5-triazine (TPTZ); Cobalt (Co)-nitrogen (N); Non-noble metal electrocatalyst; Oxygen reduction reaction (ORR); Proton exchange membrane (PEM) fuel cell","2,4,6-Tris(2-pyridyl)-1,3,5-triazine (TPTZ); Noble metals; Oxygen reduction reaction; Oxygen reduction reaction (ORR); Pyridyl; Cobalt; Disks (structural components); Electrocatalysts; Electrolytic reduction; Electron transitions; Oxygen; Precious metals; Proton exchange membrane fuel cells (PEMFC); Protons; Rate constants; Reaction kinetics; Respiratory mechanics; Rotating disks; Rotation; X ray diffraction; X ray diffraction analysis; Cobalt compounds","2,4,6-Tris(2-pyridyl)-1,3,5-triazine (TPTZ);Cobalt (Co)-nitrogen (N);Non-noble metal electrocatalyst;Oxygen reduction reaction (ORR);Proton exchange membrane (PEM) fuel cell;Noble metals;Oxygen reduction reaction;Pyridyl;Cobalt;Disks (structural components);Electrocatalysts;Electrolytic reduction;Electron transitions;Oxygen;Precious metals;Proton exchange membrane fuel cells (PEMFC);Protons;Rate constants;Reaction kinetics;Respiratory mechanics;Rotating disks;Rotation;X ray diffraction;X ray diffraction analysis;Cobalt compounds","L. Zhang; Institute for Fuel Cell Innovation, National Research Council of Canada, Vancouver, BC V6T 1W5, 4250 Wesbrook Mall, Canada; email: lei.zhang@nrc.gc.ca",,,,,,,00134686,,ELCAA,,English,Electrochim Acta,Article,Scopus,,2-s2.0-77950810291,,Canada;China,nrc.gc.ca,,,"Li, S.; Zhang, L.; Liu, H.; Pan, M.; Ling, L.; Zhang, J."
"Wu, J., Li, W.M., Higgins, D., Chen, Z.W.","Heat-Treated Nonprecious Catalyst Using Fe and Nitrogen-Rich 2,3,7,8-Tetra(pyridin-2-yl)pyrazino[2,3-g]quinoxaline Coordinated Complex for Oxygen Reduction Reaction in PEM Fuel Cells",2011,JOURNAL OF PHYSICAL CHEMISTRY C,115,38,,18856,18862,7,43,10.1021/jp204848p,,"[Wu, Jason; Li, Wenmu; Higgins, Drew; Chen, Zhongwei] Univ Waterloo, Waterloo Inst Sustainable Energy, Waterloo Inst Nanotechnol, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada",,"Pyrolyzed Fe/N/C catalysts were synthesized using a newly designed and synthesized 2,3,7,8-tetra(pyridin-2-yl)pyrazino[2,3-g]quinoxaline (TPPQ) organic compound as the nitrogen-containing ligand. The structure of TPPQ was deliberately designed to discourage the agglomeration of Fe during heat treatment as well as to provide a concentrated source of nitrogen. Catalysts were prepared by first coordinating TPPQ with Fe, forming Fe-TPPQ complexes, followed by impregnation onto carbon black (KJ600) and pyrolysis at 900 degrees C. Catalysts with 0.5%, 1%, 2%, 4%, and 8% initial iron content were prepared, and their physical characteristics were determined by X-ray diffraction, transmission electron microscopy, and X-ray, photoelectron spectroscopy analysis. Electrocatalytic activity toward the oxygen reduction reaction was evaluated and compared for all catalysts. The best performing catalyst was found to be the catalyst using 2% initial iron content. Evidence of iron metal and carbide particle formation was found for catalysts with initial iron content higher than 2%.",,DOPED CARBON NANOTUBES; O-2 REDUCTION; ACTIVE-SITES; IRON; ELECTROCATALYSTS; PYROLYSIS; STABILITY; BLACK; POLYACRYLONITRILE; ELECTROREDUCTION,DOPED CARBON NANOTUBES;O-2 REDUCTION;ACTIVE-SITES;IRON;ELECTROCATALYSTS;PYROLYSIS;STABILITY;BLACK;POLYACRYLONITRILE;ELECTROREDUCTION,zhwchen@uwaterloo.ca,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1932-7447,,,,English,J PHYS CHEM C,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science,WOS:000295058100055,2-s2.0-80053065044,Canada,uwaterloo.ca,Univ Waterloo,"Univ Waterloo, Canada","Wu, Jason; Li, Wenmu; Higgins, Drew; Chen, Zhongwei"
"Si, Y.J., Park, M.G., Cano, Z.P., Xiong, Z.P., Chen, Z.W.",Heavily nitrogen-doped acetylene black as a high-performance catalyst for oxygen reduction reaction,2017,CARBON,117,,,12,19,8,43,10.1016/j.carbon.2017.02.056,,"[Si, Yujun; Xiong, Zhongping] Sichuan Univ Sci & Engn, Sch Chem & Environm Engn, Zigong 643000, Peoples R China; [Park, Moon Gyu; Cano, Zachary Paul; Chen, Zhongwei] Univ Waterloo, Dept Chem Engn, Appl Nanomat & Clean Energy Lab, Waterloo, ON N2L 3G1, Canada",,"Developing a non-precious metal catalyst for the oxygen reduction reaction (ORR) is a key to the commercialization of low-cost fuel cells. In this work, we prepare a heavily nitrogen-doped acetylene black (OAB-N) as an ORR catalyst by heat treating oxidized acetylene black in ammonia atmosphere. By pre-oxidizing acetylene black, nitrogen atoms can be effectively doped into its graphene structure. The content of nitrogen is as high as 6.37 at % in the OAB-N catalyst prepared from the pre-oxidized acetylene black. The results show that the pre-oxidization can improve the reactivity between acetylene black and ammonia, facilitating the doping of nitrogen atoms to acetylene black to form C-N structures, especially pyridinic and pyrrolic C-N structures with higher ORR activity. Encouragingly, the resulting OAB-N exhibits good catalytic activity to ORR with an onset potential of 1.0 V (vs. RHE) in 0.1 M KOH solution, high selectivity with an electron transfer number of 3.92 and an increased limiting current density in the cathodic process. (C) 2017 Elsevier Ltd. All rights reserved.",,PEM FUEL-CELLS; CARBON NANOTUBES; MESOPOROUS CARBON; ACTIVE-SITES; METAL ELECTROCATALYSTS; GRAPHENE NANOSHEETS; FACILE SYNTHESIS; ALKALINE-MEDIUM; QUANTUM DOTS; OXIDE,PEM FUEL-CELLS;CARBON NANOTUBES;MESOPOROUS CARBON;ACTIVE-SITES;METAL ELECTROCATALYSTS;GRAPHENE NANOSHEETS;FACILE SYNTHESIS;ALKALINE-MEDIUM;QUANTUM DOTS;OXIDE,syj08448@163.com; zhwchen@uwaterloo.ca,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0008-6223,,,,English,CARBON,Article,WoS,Chemistry; Materials Science,WOS:000400212100002,,China;Canada,163.com,Sichuan Univ Sci & Engn;Univ Waterloo,"Sichuan Univ Sci & Engn, China;Univ Waterloo, Canada","Si, Yujun; Park, Moon Gyu; Cano, Zachary Paul; Xiong, Zhongping; Chen, Zhongwei"
"Woo, J., Lim, J.S., Kim, J.H., Joo, S.H.",Heteroatom-doped carbon-based oxygen reduction electrocatalysts with tailored four-electron and two-electron selectivity,2021,Chemical Communications,57,60,,7350,7361,,78,10.1039/d1cc02667d,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85111458015&doi=10.1039%2Fd1cc02667d&partnerID=40&md5=93026c7ca61c4efb7a93d071ec09224a,"School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea; Department of Chemistry, College of Natural Sciences, Seoul, South Korea; Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan, South Korea","Woo, Jinwoo, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea; Lim, June Sung, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea; Kim, Jaehyung, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea, Department of Chemistry, College of Natural Sciences, Seoul, South Korea; Joo, Sang Hoon, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea, Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan, South Korea","Oxygen reduction reaction (ORR) plays a pivotal role in electrochemical energy conversion and commodity chemical production. Oxygen reduction involving a complete four-electron (4e−) transfer is important for the efficient operation of polymer electrolyte fuel cells, whereas the ORR with a partial 2e−transfer can serve as a versatile method for producing industrially important hydrogen peroxide (H<inf>2</inf>O<inf>2</inf>). For both the 4e−and 2e−pathway ORR, platinum-group metals (PGMs) have been materials of prevalent choice owing to their high intrinsic activity, but they are costly and scarce. Hence, the development of highly active and selective non-precious metal catalysts is of crucial importance for advancing electrocatalysis of the ORR. Heteroatom-doped carbon-based electrocatalysts have emerged as promising alternatives to PGM catalysts owing to their appreciable activity, tunable selectivity, and facile preparation. This review provides an overview of the design of heteroatom-doped carbon ORR catalysts with tailored 4e−or 2e−selectivities. We highlight catalyst design strategies that promote 4e−or 2e−ORR activity. We also summarise the major active sites and activity descriptors of the respective ORR pathways and describe the catalyst properties controlling the ORR mechanisms. We conclude the review with a summary and suggestions for future research. © The Royal Society of Chemistry 2021.",,Carbon; Catalyst activity; Catalyst selectivity; Economic geology; Electrocatalysis; Electrocatalysts; Electrolysis; Electrolytic reduction; Energy conversion; Hydrogen peroxide; Oxygen; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Catalyst properties; Commodity chemicals; Electrochemical energy conversions; Facile preparation; Intrinsic activities; Non-precious metal catalysts; Platinum group metals; Polymer electrolyte fuel cells; Oxygen reduction reaction,Carbon;Catalyst activity;Catalyst selectivity;Economic geology;Electrocatalysis;Electrocatalysts;Electrolysis;Electrolytic reduction;Energy conversion;Hydrogen peroxide;Oxygen;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Catalyst properties;Commodity chemicals;Electrochemical energy conversions;Facile preparation;Intrinsic activities;Non-precious metal catalysts;Platinum group metals;Polymer electrolyte fuel cells;Oxygen reduction reaction,"S.H. Joo; School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 50 UNIST-gil, 44919, South Korea; email: shjoo@unist.ac.kr",,,,,,Royal Society of Chemistry,13597345,,CHCOF,34231572,English,Chem. Commun.,Article,Scopus,,2-s2.0-85111458015,,South Korea,unist.ac.kr,,,"Woo, J.; Lim, J.S.; Kim, J.H.; Joo, S.H."
"Pushkarev, A.S., Pushkareva, I., Kozlova, M., Solovyev, M.A., Butrim, S., Ge, J., Xing, W., Fateev, V.N.",Heteroatom-Modified Carbon Materials and Their Use as Supports and Electrocatalysts in Proton Exchange Membrane Fuel Cells (A Review),2022,RUSSIAN JOURNAL OF ELECTROCHEMISTRY,58,7,,529,561,33,3,10.1134/S1023193522070114,,"[Pushkarev, A. S.; Pushkareva, I., V; Kozlova, M., V; Solovyev, M. A.; Butrim, S., I; Fateev, V. N.] Natl Res Ctr, Kurchatov Inst, Moscow, Russia; [Pushkarev, A. S.; Pushkareva, I., V; Kozlova, M., V; Solovyev, M. A.; Butrim, S., I] Natl Res Univ, Moscow Power Engn Inst, Moscow, Russia; [Pushkarev, A. S.] Natl Res Univ, Moscow Inst Phys & Technol, Dolgoprudnyi, Russia; [Ge, J.; Xing, W.] Chinese Acad Sci, Changchun Inst Appl Chem, Changchun, Peoples R China",,"Supports of electrocatalytically active nanoparticles affect significantly the activity and stability of electrocatalysts for the hydrogen oxidation and oxygen reduction reactions in membrane-electrode assemblies of proton exchange membrane fuel cells. Currently, carbon blacks are mainly used as supports, which are characterized by a number of disadvantages, including insufficient stability under the fuel cells operating conditions. In this regard, alternative carbon nanomaterials are proposed for the role of the supports, among which graphene and its derivatives can be highlighted. Such materials are characterized by a high specific surface area, stability, electrical conductivity, and provide wide opportunities to control the properties of their surface due to its functionalization. This review summarizes the recent advances in the use of the closest analogues of graphene and its derivatives, functionalized with various elements, both as electrocatalysts and supports for electrocatalytically active nanoparticles for proton exchange membrane fuel cells (including those with the direct alcohol oxidation). The recent advances in the activity and stability of such nanomaterials and their based electrocatalysts under the conditions of characteristic electrochemical reactions (oxygen reduction, alcohol oxidation, etc.), as well as the special features of their application in the composition of membrane-electrode assemblies in the fuel cells are considered.",graphene; fuel cell; carbon support; doping; heteroatom; solid polymer electrolyte; proton-exchange membrane,OXYGEN REDUCTION REACTION; REDUCED GRAPHENE OXIDE; NITROGEN-DOPED GRAPHENE; METAL-FREE ELECTROCATALYST; FE-N-C; CHEMICAL-VAPOR-DEPOSITION; LARGE-SCALE PRODUCTION; PT-BASED CATALYSTS; HIGH-SURFACE-AREA; PLATINUM NANOPARTICLES,graphene;fuel cell;carbon support;doping;heteroatom;solid polymer electrolyte;proton-exchange membrane;OXYGEN REDUCTION REACTION;REDUCED GRAPHENE OXIDE;NITROGEN-DOPED GRAPHENE;METAL-FREE ELECTROCATALYST;FE-N-C;CHEMICAL-VAPOR-DEPOSITION;LARGE-SCALE PRODUCTION;PT-BASED CATALYSTS;HIGH-SURFACE-AREA;PLATINUM NANOPARTICLES,pushkarev_as@outlook.com,,"TROPIC ISLE BLDG, PO BOX 3331. ROAD TOWN, TORTOLA, BRITISH VIRGIN ISL",,,,PLEIADES PUBLISHING LTD,1023-1935,,,,English,RUSS J ELECTROCHEM+,Review,WoS,Electrochemistry,WOS:000829618500001,,Russian Federation;China,outlook.com,Natl Res Ctr;Natl Res Univ;Chinese Acad Sci,"Natl Res Ctr, Russian Federation;Natl Res Univ, Russian Federation;Chinese Acad Sci, China","Pushkarev, A. S.; Pushkareva, I., V; Kozlova, M., V; Solovyev, M. A.; Butrim, S., I; Ge, J.; Xing, W.; Fateev, V. N."
"Yan, J., Gu, T.Y., Shi, R.H., Chen, X., Rummeli, M.H., Yang, R.Z.",Heteroatom sulfur-doping in single-atom Fe-NC catalysts for durable oxygen reduction reaction in both alkaline and acidic media,2023,JOURNAL OF MATERIALS CHEMISTRY A,11,30,,16180,16189,10,30,10.1039/d3ta02712k,,"[Yan, Jin; Gu, Tianyi; Shi, Ruhua; Rummeli, Mark H. H.; Yang, Ruizhi] Soochow Univ, Soochow Inst Energy & Mat Innovat, Coll Energy, Suzhou 215006, Peoples R China; [Chen, Xin] Southwest Petr Univ, Coll Chem & Chem Engn, Computat Chem & Mol Simulat, Chengdu 610500, Peoples R China; [Rummeli, Mark H. H.] Polish Acad Sci, Ctr Polymer & Carbon Mat, M Curie Sklodowskiej 34, PL-41819 Zabrze, Poland; [Rummeli, Mark H. H.] VSB Tech Univ Ostrava, Inst Environm Technol, Listopadu 15, Ostrava 70833, Czech Republic",,"The need for highly efficient and economical Pt-free oxygen reduction reaction (ORR) electrocatalysts has led to the rapid development of single-atom transition metals anchored on heteroatom-doped carbon catalysts. However, their activity and stability remain below the requirements for practical applications. Herein, we propose a heteroatom (S)-doped hollow atomically dispersed Fe-N-C catalyst (H-S-Fe-NC) synthesized through a two-step thermal activation process. Compared with the un-doped Fe-N-C catalyst, the optimized H-S-Fe-NC catalysts display exceptional ORR activity and stability, achieving a high half-wave potential of 0.91 V in alkaline solution and 0.78 V in acidic solution, respectively. Combined experimental and theoretical results reveal the enhanced ORR activity of H-S-Fe-NC to be boosted by the introduction of S, which moderates the adsorption energy of the oxygen intermediates. Furthermore, we expand the application of the H-S-Fe-NC catalysts by using them in a zinc-air battery and proton-exchange membrane fuel cell.",,CARBON POLYHEDRON; METAL; ELECTROCATALYST; PYROLYSIS; ZIF-8,CARBON POLYHEDRON;METAL;ELECTROCATALYST;PYROLYSIS;ZIF-8,chenxin830107@pku.edu.cn; yangrz@suda.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:001024243200001,2-s2.0-85166290168,China;Poland;Czech Republic,pku.edu.cn,Soochow Univ;Southwest Petr Univ;Polish Acad Sci;VSB Tech Univ Ostrava,"Soochow Univ, China;Southwest Petr Univ, China;Polish Acad Sci, Poland;VSB Tech Univ Ostrava, Czech Republic","Yan, Jin; Gu, Tianyi; Shi, Ruhua; Chen, Xin; Rummeli, Mark H. H.; Yang, Ruizhi"
"Malko, D., Guo, Y.J., Jones, P., Britovsek, G., Kucernak, A.",Heterogeneous iron containing carbon catalyst (Fe-N/C) for epoxidation with molecular oxygen,2019,JOURNAL OF CATALYSIS,370,,,357,363,7,30,10.1016/j.jcat.2019.01.008,,"[Malko, Daniel; Guo, Yanjun; Jones, Pip; Britovsek, George; Kucernak, Anthony] Imperial Coll London, Dept Chem, London SW7 2AZ, England",,"Pyrolized transition metal and nitrogen containing carbon materials (M-N/C) have shown promising activities as electrocatalysts for oxygen reduction reactions (ORR) in fuel cell cathodes. Similar materials have recently gained interest as heterogeneous catalysts. We report that ORR-active heterogeneous M-N/C materials can catalyze the chemical epoxidation of olefins with molecular oxygen and two equivalents of aldehyde at room temperature and ambient pressure. The observed yield and selectivity is higher than that for homogeneous analogues and the catalysts achieve TOF > 2700 h(-1) and TON > 16,000. The ability to recycle the catalyst several times is also demonstrated. (C) 2019 Elsevier Inc. All rights reserved.",Heterogeneous catalysis; Epoxidation; Oxygen activation; Mild conditions,COBALT OXIDE CATALYSTS; PEM FUEL-CELL; METAL; ALKENES; ELECTROCATALYSTS; CYTOCHROME-P450; CARBOCATALYSIS; COMPLEXES; MECHANISM; OXIDATION,Heterogeneous catalysis;Epoxidation;Oxygen activation;Mild conditions;COBALT OXIDE CATALYSTS;PEM FUEL-CELL;METAL;ALKENES;ELECTROCATALYSTS;CYTOCHROME-P450;CARBOCATALYSIS;COMPLEXES;MECHANISM;OXIDATION,anthony@imperial.ac.uk,,"525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA",,,,ACADEMIC PRESS INC ELSEVIER SCIENCE,0021-9517,,,,English,J CATAL,Article,WoS,Chemistry; Engineering,WOS:000460493700034,,United Kingdom,imperial.ac.uk,Imperial Coll London,"Imperial Coll London, United Kingdom","Malko, Daniel; Guo, Yanjun; Jones, Pip; Britovsek, George; Kucernak, Anthony"
"Duan, D., Huo, J., Chen, J., Chi, B., Chen, Z., Sun, S., Zhao, Y., Zhao, H., Cui, Z., Liao, S.",Hf and Co Dual Single Atoms Co-Doped Carbon Catalyst Enhance the Oxygen Reduction Performance,2024,Small,20,25,2310491,,,,20,10.1002/smll.202310491,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85181699984&doi=10.1002%2Fsmll.202310491&partnerID=40&md5=89ea81dd66aae7a5f7e6ffc1215a0c00,"School of Chemistry and Chemical Engineering, Key Laboratory of Fuel Cell Technology of Guangdong Province, Guangzhou, Guangdong, China; Matériaux et Télécommunications, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China; School of Chemistry and Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, China","Duan, Diancheng, School of Chemistry and Chemical Engineering, Key Laboratory of Fuel Cell Technology of Guangdong Province, Guangzhou, Guangdong, China; Huo, Junlang, School of Chemistry and Chemical Engineering, Key Laboratory of Fuel Cell Technology of Guangdong Province, Guangzhou, Guangdong, China; Chen, Jiaxiang, School of Chemistry and Chemical Engineering, Key Laboratory of Fuel Cell Technology of Guangdong Province, Guangzhou, Guangdong, China; Chi, Bin, School of Chemistry and Chemical Engineering, Key Laboratory of Fuel Cell Technology of Guangdong Province, Guangzhou, Guangdong, China; Chen, Zhangsen, Matériaux et Télécommunications, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Sun, Shuhui, Matériaux et Télécommunications, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Zhao, Yang, Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China; Zhao, He, School of Chemistry and Chemical Engineering, Key Laboratory of Fuel Cell Technology of Guangdong Province, Guangzhou, Guangdong, China, School of Chemistry and Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, China; Cui, Zhiming, School of Chemistry and Chemical Engineering, Key Laboratory of Fuel Cell Technology of Guangdong Province, Guangzhou, Guangdong, China; Liao, Shijun, School of Chemistry and Chemical Engineering, Key Laboratory of Fuel Cell Technology of Guangdong Province, Guangzhou, Guangdong, China","Single-atom metal-doped M–N–C (M═Fe, Co, Mn, or Ni) catalysts exhibit excellent catalytic activity toward oxygen reduction reactions (ORR). However, their performance still has a large gap considering the demand for their practical applications. This study reports a high-performance dual single-atom doped carbon catalyst (HfCo–N–C), which is prepared by pyrolyzing Co and Hf co-doped ZIF-8. Co and Hf are atomically dispersed in the carbon framework and coordinated with N to form Co–N<inf>4</inf> and Hf–N<inf>4</inf> active moieties. The synergetic effect between Co–N<inf>4</inf> and Hf–N<inf>4</inf> significantly enhance the catalytic activity and durability of the catalyst. In an acidic medium, the ORR half-wave potential (E<inf>1/2</inf>) of the catalyst is up to 0.82 V, which is much higher than that of the Co–N–C catalyst without Hf co-doping (0.80 V). The kinetic current density of the catalyst is up to 2.49 A cm−2 at 0.85 V, which is 1.74 times that of the Co–N–C catalyst without Hf co-doping. Moreover, the catalyst exhibits excellent cathodic performance in single proton exchange membrane fuel cells and Zn–air batteries. Furthermore, Hf co-doping can effectively suppress the formation of H<inf>2</inf>O<inf>2</inf>, resulting in significantly improved stability and durability. © 2024 Wiley-VCH GmbH.",dual-single-atom catalysts; oxygen reduction reaction; PEMFCs; synergistic effect,Atoms; Carbon; Catalyst activity; Durability; Electrolytic reduction; Oxygen; Co-doped; Co-doping; Doped carbons; Dual-single-atom catalyst; Oxygen reduction reaction; P.E.M.F.C; Performance; Single-atoms; Synergistic effect; ]+ catalyst; Proton exchange membrane fuel cells (PEMFC); carbon; fuel; oxygen; proton; article; atom; catalysis; catalyst; controlled study; current density; kinetics; membrane; reduction (chemistry),dual-single-atom catalysts;oxygen reduction reaction;PEMFCs;synergistic effect;Atoms;Carbon;Catalyst activity;Durability;Electrolytic reduction;Oxygen;Co-doped;Co-doping;Doped carbons;Dual-single-atom catalyst;P.E.M.F.C;Performance;Single-atoms;]+ catalyst;Proton exchange membrane fuel cells (PEMFC);fuel;proton;article;atom;catalysis;catalyst;controlled study;current density;kinetics;membrane;reduction (chemistry),"H. Zhao; The Key Laboratory of Fuel Cell Technology of Guangdong Province & The Key Laboratory of New Energy, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China; email: zhaohesc@scut.edu.cn; S. Liao; The Key Laboratory of Fuel Cell Technology of Guangdong Province & The Key Laboratory of New Energy, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China; email: chsjliao@scut.edu.cn; S. Sun; Centre Énergie, Matériaux et Télécommunications, Institute National de la Recherche Scientifique, Varennes, J3X 1P7, Canada; email: Shuhui.Sun@inrs.ca",,,,,,John Wiley and Sons Inc,16136810,,SMALB,38189624,English,Small,Article,Scopus,,2-s2.0-85181699984,,China;Canada,scut.edu.cn,,,"Duan, D.; Huo, J.; Chen, J.; Chi, B.; Chen, Z.; Sun, S.; Zhao, Y.; Zhao, H.; Cui, Z.; Liao, S."
"Liu, M., Ke, S., Sun, C., Zhang, C., Liao, S.",Hf Doping Boosts the Excellent Activity and Durability of Fe-N-C Catalysts for Oxygen Reduction Reaction and Li-O2 Batteries,2024,Nanomaterials,14,24,2003,,,,2,10.3390/nano14242003,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85213416913&doi=10.3390%2Fnano14242003&partnerID=40&md5=8121a66ca155a1af57d53241af4318fd,"National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies, Foshan, Guangdong, China; School of Materials Science and Engineering, Hubei Normal University, Huangshi, Hubei, China; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan, Hubei, China; School of Chemistry and Chemical Engineering, Key Laboratory of Fuel Cell Technology of Guangdong Province, Guangzhou, Guangdong, China","Liu, Mingrui, National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies, Foshan, Guangdong, China; Ke, Shaoqiu, School of Materials Science and Engineering, Hubei Normal University, Huangshi, Hubei, China; Sun, Chuangqing, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan, Hubei, China; Zhang, Chenzhuo, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan, Hubei, China; Liao, Shijun, School of Chemistry and Chemical Engineering, Key Laboratory of Fuel Cell Technology of Guangdong Province, Guangzhou, Guangdong, China","Developing highly active and durable non-noble metal catalysts is crucial for energy conversion and storage, especially for proton exchange membrane fuel cells (PEMFCs) and lithium-oxygen (Li-O<inf>2</inf>) batteries. Non-noble metal catalysts are considered the greatest potential candidates to replace noble metal catalysts in PEMFCs and Li-O<inf>2</inf> batteries. Herein, we propose a novel type of non-noble metal catalyst (Fe-Hf/N/C) doped with Hf into a mesoporous carbon material derived from Hf-ZIF-8 and co-doping with Fe and N, which greatly enhanced the activity and durability of the catalyst. When applied in the cathode of PEMFCs, the current density can reach up 1.1 and 1.7 A cm−2 at 0.7 and 0.6 V, respectively, with a maximum power density of 1.15 W cm−2. The discharge capacity of the Li-O<inf>2</inf> batteries is up to 15,081 mAh g−1 with Fe-Hf/N/C in the cathode, which also shows a lower charge overpotential, 200 mV lower than that of the Fe/N/C. Additionally, the Fe-Hf/N/C catalyst has demonstrated better stability in both PEMFCs and Li-O<inf>2</inf> batteries. This reveals that Hf can not only optimize the electronic structure of iron sites and increase the active sites for the oxygen reduction reaction, but can also anchor the active sites, enhancing the durability of the catalyst. This study provides a new strategy for the development of high-performance and durable catalysts for PEMFCs and Li-O<inf>2</inf> batteries. © 2024 by the authors.",active sites; durability; Li-O2 batteries; non-noble metal catalyst; oxygen reduction reaction; PEMFCs,,active sites;durability;Li-O2 batteries;non-noble metal catalyst;oxygen reduction reaction;PEMFCs,"M. Liu; National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies, Foshan Xianhu Laboratory, Foshan, 528200, China; email: liumingrui@xhlab.cn; S. Ke; Hubei Key Laboratory of Photoelectric Materials and Devices, School of Materials Science and Engineering, Hubei Normal University, Huangshi, 435002, China; email: shaoqiuke@hbnu.edu.cn",,,,,,Multidisciplinary Digital Publishing Institute (MDPI),,,,,English,Nanomaterials,Article,Scopus,,2-s2.0-85213416913,,China,xhlab.cn,,,"Liu, M.; Ke, S.; Sun, C.; Zhang, C.; Liao, S."
"Chen, H., Wu, F., Li, J., Zhang, Q., Zhang, Q., Slavcheva, E., Chen, L.",Hierarchical High-Throughput Screening of the Ligand Effect of Electrocatalytic Oxygen Reduction on Dual-Metal Atomic Catalysts (M1M2N6-R): A First-Principles Study,2024,ACS Applied Nano Materials,7,6,,6401,6408,,1,10.1021/acsanm.4c00128,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85187692736&doi=10.1021%2Facsanm.4c00128&partnerID=40&md5=41df8612ad7fd54a154b3d9549d3fa5e,"College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang, China; Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, Ningbo, Zhejiang, China; University of Chinese Academy of Sciences, Beijing, China; Institute of Electrochemistry and Energy Systems, Sofia, Bulgaria","Chen, Hualin, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang, China, Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, Ningbo, Zhejiang, China; Wu, Fei, Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, Ningbo, Zhejiang, China; Li, Jiejie, Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, Ningbo, Zhejiang, China; Zhang, Qunfeng, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang, China, Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, Ningbo, Zhejiang, China; Zhang, Qiuju, Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, Ningbo, Zhejiang, China, University of Chinese Academy of Sciences, Beijing, China; Slavcheva, Evelina P., Institute of Electrochemistry and Energy Systems, Sofia, Bulgaria; Chen, Liang, Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, Ningbo, Zhejiang, China, University of Chinese Academy of Sciences, Beijing, China","The design of low-cost and high-activity oxygen reduction catalysts on the cathode is important to improve the conversion efficiency in proton exchange membrane fuel cells. A series of nonprecious 3d-TM-combined M<inf>1</inf>M<inf>2</inf>N<inf>6</inf>/C candidates are constructed within high-throughput screening to find out high-efficient oxygen reduction reaction (ORR) catalysts through axially coordinating with 13 kinds of potentially accompanied ligands by first-principles calculation. Among the fabricated 55 pristine M<inf>1</inf>M<inf>2</inf>N<inf>6</inf> structures, some pre-3d metals (d<inf>e</inf> ≤ 5) of Sc-, Ti-, and V-contained M<inf>1</inf>M<inf>2</inf>N<inf>6</inf>/C are excluded due to poor ORR activities with too low negative limiting potentials (U<inf>L</inf>) values (U<inf>L</inf> < −1.0 V). The screening results of three common ligands (R = -OH, -F, and -NH<inf>2</inf>) coordination indicate that axial ligand modification could significantly enlarge the U<inf>L</inf> of M<inf>1</inf>M<inf>2</inf>N<inf>6</inf>-R. A volcano relationship between U<inf>L</inf> and ΔG of OH* intermediate is helpful to select four excellent ORR candidates of NiNi-, CoNi-, FeCo-, and CoCo-combinations to further perform 10 kinds of axial ligand engineering. More applicable ligands of -CO, -COH, -NH, -NO, -Cl, and -CH<inf>2</inf> are identified to enhance ORR activity for certain pristine M<inf>1</inf>M<inf>2</inf>N<inf>6</inf> catalysts. Totally, 16 different candidates exhibit good ORR activity with U<inf>L</inf> > 0.80 V of Pt(111) by ligand modification screening. The increased moderate positive charge on central metals is ascribed to the weakened interaction between catalysts and OH* in *OH-intermediates. Our work provides valuable insights into understanding ligand engineering on dual-metal catalysts, which is helpful for designing highly efficient, nonprecious single-atom catalysts by tuning the metal bonding environment. © 2024 American Chemical Society",3d transitional metals; dual-metal nitrogen carbon; high-throughput screening; ligand coordination; ORR,Carbon; Catalyst activity; Conversion efficiency; Electrolytic reduction; Nitrogen; Oxygen; Proton exchange membrane fuel cells (PEMFC); 3d transitional metal; Dual metals; Dual-metal nitrogen carbon; High throughput screening; Ligand coordination; OH -; Oxygen reduction reaction; Reaction activity; Transitional metals; ]+ catalyst; Ligands,3d transitional metals;dual-metal nitrogen carbon;high-throughput screening;ligand coordination;ORR;Carbon;Catalyst activity;Conversion efficiency;Electrolytic reduction;Nitrogen;Oxygen;Proton exchange membrane fuel cells (PEMFC);3d transitional metal;Dual metals;High throughput screening;OH -;Oxygen reduction reaction;Reaction activity;Transitional metals;]+ catalyst;Ligands,"Q. Zhang; College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, China; email: zhangqj@nimte.ac.cn; L. Chen; Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Material Technology and Engineering Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, China; email: chenliang@nimte.ac.cn",,,,,,American Chemical Society,,,,,English,ACS Appl. Nano Mat.,Article,Scopus,,2-s2.0-85187692736,,China;Bulgaria,nimte.ac.cn,,,"Chen, H.; Wu, F.; Li, J.; Zhang, Q.; Zhang, Q.; Slavcheva, E.; Chen, L."
"Tong, L., Wang, Y.C., Chen, M.X., Chen, Z.Q., Yan, Q.Q., Yang, C.L., Zhou, Z.Y., Chu, S.Q., Feng, X.L., Liang, H.W.",Hierarchically porous carbons as supports for fuel cell electrocatalysts with atomically dispersed Fe-Nx moieties,2019,CHEMICAL SCIENCE,10,35,,8236,8240,5,42,10.1039/c9sc01154d,,"[Tong, Lei; Chen, Ming-Xi; Chen, Zhi-Qing; Yan, Qiang-Qiang; Yang, Cheng-Long; Liang, Hai-Wei] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Dept Chem, Hefei 230026, Anhui, Peoples R China; [Wang, Yu-Cheng; Zhou, Zhi-You] Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Collaborat Innovat Ctr Chem Energy Mat, Coll Chem & Chem Engn, Xiamen 361005, Fujian, Peoples R China; [Chu, Sheng-Qi] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China; [Feng, Xinliang] Tech Univ Dresden, Ctr Adv Elect Dresden, Fac Chem & Food Chem, D-01062 Dresden, Germany",,"The development of high-performance non-platinum group metal (non-PGM) catalysts for the oxygen reduction reaction (ORR) is still of significance in promoting the commercialization of proton exchange membrane fuel cells (PEMFCs). In this work, a ""hierarchically porous carbon (HPC)-supporting"" approach was developed to synthesize highly ORR active Fe-phenanthroline (Fe-phen) derived Fe-N-x-C catalysts. Compared to commercial carbon black supports, utilizing HPCs as carbon supports can not only prevent the formation of inactive iron nanoparticles during pyrolysis but also optimize the porous morphology of the catalysts, which eventually increases the amount of reactant-accessible and atomically dispersed Fe-N-x active sites. The prepared catalyst therefore exhibits a remarkable ORR activity in both half-cells (half-wave potential of 0.80 V in 0.5 M H2SO4) and H-2-air PEMFCs (442 mA cm(-2) at a working voltage of 0.6 V), making it among the best non-PGM catalysts for PEMFCs.",,OXYGEN-REDUCTION REACTION; NITROGEN-DOPED CARBON; CATALYTIC SITES; METAL-CATALYSTS; IRON,OXYGEN-REDUCTION REACTION;NITROGEN-DOPED CARBON;CATALYTIC SITES;METAL-CATALYSTS;IRON,xinliang.feng@tu-dresden.de; hwliang@ustc.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2041-6520,,,31673323,English,CHEM SCI,Article,WoS,Chemistry,WOS:000486045200017,2-s2.0-85072246680,China;Germany,tu-dresden.de,Univ Sci & Technol China;Xiamen Univ;Chinese Acad Sci;Tech Univ Dresden,"Univ Sci & Technol China, China;Xiamen Univ, China;Chinese Acad Sci, China;Tech Univ Dresden, Germany","Tong, Lei; Wang, Yu-Cheng; Chen, Ming-Xi; Chen, Zhi-Qing; Yan, Qiang-Qiang; Yang, Cheng-Long; Zhou, Zhi-You; Chu, Sheng-Qi; Feng, Xinliang; Liang, Hai-Wei"
"Chen, G., Lu, R., Li, C., Yu, J., Li, X., Ni, L., Zhang, Q., Zhu, G., Liu, S., Zhang, J., Kramm, U.I., Zhao, Y., Wu, G., Xie, J., Feng, X.",Hierarchically Porous Carbons with Highly Curved Surfaces for Hosting Single Metal FeN4 Sites as Outstanding Oxygen Reduction Catalysts,2023,Advanced Materials,35,32,2300907,,,,185,10.1002/adma.202300907,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85163699313&doi=10.1002%2Fadma.202300907&partnerID=40&md5=e5021b5b1079500f517a37683bb62d0f,"Center for Advancing Electronics Dresden, Dresden, Sachsen, Germany; School of Materials Science and Engineering, State Key Laboratory of Silicate Materials for Architectures, Wuhan, Hubei, China; Department of Mechanical and Energy Engineering, College of Engineering, West Lafayette, IN, United States; Purdue University, West Lafayette, IN, United States; Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Sciences, Beijing, China; Department of Synthetic Materials and Functional Devices, Max Planck Institute of Microstructure Physics, Halle, Sachsen-Anhalt, Germany; Department of Chemistry, Technische Universität Darmstadt, Darmstadt, Hessen, Germany; School of Engineering and Applied Sciences, Buffalo, NY, United States","Chen, Guangbo, Center for Advancing Electronics Dresden, Dresden, Sachsen, Germany; Lu, Ruihu, School of Materials Science and Engineering, State Key Laboratory of Silicate Materials for Architectures, Wuhan, Hubei, China; Li, Chenzhao, Department of Mechanical and Energy Engineering, College of Engineering, West Lafayette, IN, United States, Purdue University, West Lafayette, IN, United States; Yu, Jianmin, Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Sciences, Beijing, China; Li, Xiaodong, Center for Advancing Electronics Dresden, Dresden, Sachsen, Germany, Department of Synthetic Materials and Functional Devices, Max Planck Institute of Microstructure Physics, Halle, Sachsen-Anhalt, Germany; Ni, Lingmei, Department of Chemistry, Technische Universität Darmstadt, Darmstadt, Hessen, Germany; Zhang, Qi, Department of Mechanical and Energy Engineering, College of Engineering, West Lafayette, IN, United States; Zhu, Guangqi, Department of Mechanical and Energy Engineering, College of Engineering, West Lafayette, IN, United States; Liu, Shengwen, School of Engineering and Applied Sciences, Buffalo, NY, United States; Zhang, Jiaxu, Center for Advancing Electronics Dresden, Dresden, Sachsen, Germany; Kramm, Ulrike Ingrid, Department of Chemistry, Technische Universität Darmstadt, Darmstadt, Hessen, Germany; Zhao, Y., School of Materials Science and Engineering, State Key Laboratory of Silicate Materials for Architectures, Wuhan, Hubei, China; Wu, Gang, School of Engineering and Applied Sciences, Buffalo, NY, United States; Xie, Jian, Department of Mechanical and Energy Engineering, College of Engineering, West Lafayette, IN, United States; Feng, Xinliang, Center for Advancing Electronics Dresden, Dresden, Sachsen, Germany, Department of Synthetic Materials and Functional Devices, Max Planck Institute of Microstructure Physics, Halle, Sachsen-Anhalt, Germany","Iron–nitrogen–carbon (Fe-N-C) materials have emerged as a promising alternative to platinum-group metals for catalyzing the oxygen reduction reaction (ORR) in proton-exchange-membrane fuel cells. However, their low intrinsic activity and stability are major impediments. Herein, an Fe-N–C electrocatalyst with dense FeN<inf>4</inf> sites on hierarchically porous carbons with highly curved surfaces (denoted as FeN<inf>4</inf>-hcC) is reported. The FeN<inf>4</inf>-hcC catalyst displays exceptional ORR activity in acidic media, with a high half-wave potential of 0.85 V (versus reversible hydrogen electrode) in 0.5 m H<inf>2</inf>SO<inf>4</inf>. When integrated into a membrane electrode assembly, the corresponding cathode displays a high maximum peak power density of 0.592 W cm−2 and demonstrates operating durability over 30 000 cycles under harsh H<inf>2</inf>/air conditions, outperforming previously reported Fe–N-C electrocatalysts. These experimental and theoretical studies suggest that the curved carbon support fine-tunes the local coordination environment, lowers the energies of the Fe d-band centers, and inhibits the adsorption of oxygenated species, which can enhance the ORR activity and stability. This work provides new insight into the carbon nanostructure–activity correlation for ORR catalysis. It also offers a new approach to designing advanced single-metal-site catalysts for energy-conversion applications. © 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH.",carbon curvature; Fe–N–C catalysts; fuel cells; hierarchically porous carbons; oxygen reduction reaction,Catalyst activity; Electrocatalysts; Electrodes; Electrolytic reduction; Iron compounds; Oxygen; Porous materials; Proton exchange membrane fuel cells (PEMFC); Carbon curvature; Curved surfaces; Fe–N–C catalyst; Hierarchically porous carbons; Iron nitrogen; Nitrogen-carbon; Oxygen reduction catalysts; Oxygen reduction reaction; Reaction activity; ]+ catalyst; Carbon,carbon curvature;Fe–N–C catalysts;fuel cells;hierarchically porous carbons;oxygen reduction reaction;Catalyst activity;Electrocatalysts;Electrodes;Electrolytic reduction;Iron compounds;Oxygen;Porous materials;Proton exchange membrane fuel cells (PEMFC);Curved surfaces;Fe–N–C catalyst;Iron nitrogen;Nitrogen-carbon;Oxygen reduction catalysts;Reaction activity;]+ catalyst;Carbon,"X. Feng; Center for Advancing Electronics Dresden (Cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Dresden, 01062, Germany; email: xinliang.feng@tu-dresden.de; Y. Zhao; State Key Laboratory of Silicate Materials for Architectures, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China; email: yan2000@whut.edu.cn; J. Xie; Department of Mechanical and Energy Engineering, Purdue School of Engineering and Technology, Indiana University–Purdue University, Indianapolis, 46202, United States; email: jianxie@iupui.edu; G. Wu; Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, 14260, United States; email: gangwu@buffalo.edu",,,,,,John Wiley and Sons Inc,09359648,,ADVME,,English,Adv Mater,Article,Scopus,,2-s2.0-85163699313,,Germany;China;United States,tu-dresden.de,,,"Chen, G.; Lu, R.; Li, C.; Yu, J.; Li, X.; Ni, L.; Zhang, Q.; Zhu, G.; Liu, S.; Zhang, J.; Kramm, U.I.; Zhao, Y.; Wu, G.; Xie, J.; Feng, X."
"Baek, J., Son, H., Lee, E., Yoo, S.J., Kim, M., Lee, G.",Hierarchically porous Co-N-C electrocatalysts with enhanced mass transport and cobalt utilization efficiency for oxygen reduction reaction in high-performance PEMFCs,2025,Journal of Materials Chemistry A,13,16,,11445,11457,,9,10.1039/d5ta00827a,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105003039829&doi=10.1039%2Fd5ta00827a&partnerID=40&md5=100a29893a72f164882a1382b17a9d1d,"Advanced Energy Materials Design Lab., Yeungnam University, Gyeongsan, Gyeongsangbuk-do, South Korea; Korea Institute of Science and Technology, Seoul, South Korea; School of Advanced Materials and Electrical Engineering, Gyeongkuk National University, Andong, South Korea","Baek, Jinhyuk, Advanced Energy Materials Design Lab., Yeungnam University, Gyeongsan, Gyeongsangbuk-do, South Korea; Son, Hyeonwook, Advanced Energy Materials Design Lab., Yeungnam University, Gyeongsan, Gyeongsangbuk-do, South Korea; Lee, Eungjun, Korea Institute of Science and Technology, Seoul, South Korea; Yoo, Sung Jong, Korea Institute of Science and Technology, Seoul, South Korea; Kim, Moonsu, Advanced Energy Materials Design Lab., Yeungnam University, Gyeongsan, Gyeongsangbuk-do, South Korea, School of Advanced Materials and Electrical Engineering, Gyeongkuk National University, Andong, South Korea; Lee, Gibaek, Advanced Energy Materials Design Lab., Yeungnam University, Gyeongsan, Gyeongsangbuk-do, South Korea","Cobalt-coordinated nitrogen-doped carbon (Co-N-C) materials have emerged as promising alternatives to platinum-based catalysts for proton exchange membrane fuel cells (PEMFCs) due to their cost-effectiveness and durability. However, conventional Co-N-C catalysts exhibit limitations in mass transport as the active Co-N<inf>x</inf> sites are often embedded within a dense carbon matrix, reducing their site accessibility. This study introduces a melamine-assisted synthesis approach to develop Co-N-C catalysts with a hierarchical porous structure that significantly enhances the accessibility of Co-N<inf>x</inf> active sites. By incorporating melamine with zeolitic imidazolate frameworks (ZIFs) during synthesis, an optimized pore architecture is achieved, facilitating efficient mass transport of reactants (H+ and O<inf>2</inf>) to active sites and enabling effective water removal. This unique structure yields a high density of accessible active sites, resulting in superior oxygen reduction reaction (ORR) activity. XPS and electrochemical measurements confirm the increased density of Co-N<inf>x</inf> species, establishing a robust structure-property correlation. In membrane electrode assembly (MEA) integration for PEMFC applications, the synthesized Co-N-C catalyst exhibits excellent performance with enhanced stability and reduced mass transfer overpotential. This work highlights a scalable strategy for developing durable, highly active non-precious metal catalysts, advancing the practical viability of PEMFC technology. © 2025 The Royal Society of Chemistry.",,Bioremediation; Nafion membranes; Oxygen reduction reaction; Palladium; Active site; Carbon catalysts; Carbon material; Hierarchically porous; Nitrogen-doped carbons; Performance; Platinum based catalyst; Proton-exchange membranes fuel cells; Utilization efficiency; Electrolytic reduction,Bioremediation;Nafion membranes;Oxygen reduction reaction;Palladium;Active site;Carbon catalysts;Carbon material;Hierarchically porous;Nitrogen-doped carbons;Performance;Platinum based catalyst;Proton-exchange membranes fuel cells;Utilization efficiency;Electrolytic reduction,"M. Kim; Advanced Energy Materials Design Lab, School of Chemical Engineering, Yeungnam University, Gyeongsan, 38541, South Korea; email: moonsukim@gknu.ac.kr; G. Lee; Advanced Energy Materials Design Lab, School of Chemical Engineering, Yeungnam University, Gyeongsan, 38541, South Korea; email: gibaek@ynu.ac.kr",,,,,,Royal Society of Chemistry,20507488,,JMCAE,,English,J. Mater. Chem. A,Article,Scopus,,2-s2.0-105003039829,,South Korea,gknu.ac.kr,,,"Baek, J.; Son, H.; Lee, E.; Yoo, S.J.; Kim, M.; Lee, G."
"Zheng, R.X., Meng, Q.L., Zhang, L., Liu, C., Xing, W., Xiao, M.",Hierarchically Porous Fe-N-C Catalysts for Efficient Electrocatalytic Oxygen Reduction Reaction; 分级孔结构的 Fe-N-C 催化剂用于高效电催化氧还原,2023,Chinese Journal of Applied Chemistry,40,8,,1187,1194,,0,10.19894/j.issn.1000-0518.230067,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85181528204&doi=10.19894%2Fj.issn.1000-0518.230067&partnerID=40&md5=a8ad29bfe30aab1c404e6e57992853b9,"State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Department of Chemical Engineering and Applied Chemistry, University of Science and Technology of China, Hefei, Anhui, China","Zheng, Ruixue, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, Department of Chemical Engineering and Applied Chemistry, University of Science and Technology of China, Hefei, Anhui, China; Meng, Qinglei, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Zhang, Li, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Liu, Changpeng, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, Department of Chemical Engineering and Applied Chemistry, University of Science and Technology of China, Hefei, Anhui, China; Xing, Wei, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, Department of Chemical Engineering and Applied Chemistry, University of Science and Technology of China, Hefei, Anhui, China; Xiao, Meiling, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, Department of Chemical Engineering and Applied Chemistry, University of Science and Technology of China, Hefei, Anhui, China",Oxygen reduction reaction（ORR）is an important cathode reaction for metal-air batteries and proton exchange membrane fuel cells（PEMFCs）. It is of great significance to study non-noble metal catalysts with high activity and stability. In this paper，MIL-101（- Al-Fe） with hierarchical porous structure is innovatively used as the metal precursor template，and Fe-N-C catalysts with rich mesoporous structure are successfully prepared. Electrochemical test results show that Fe-N-C-MIL-900 shows the best ORR activity with half-wave potential of 0. 905 V in 0. 1 mol/L KOH electrolyte. The ORR electron transfer number of Fe-N-C-MIL-900 catalyst is 3. 98，and the H<inf>2</inf>O<inf>2</inf> yield is less than 3%，demonstrating an obvious 4-electron ORR pathway. This work provides a new way to prepare hierarchically porous Fe-N-C catalysts with high ORR activity. © 2019 Institute of Geological Sciences of the National Academy of Sciences of Ukraine,4-Electron pathway; Fe-based catalysts; Hierarchically porous structure; Oxygen reduction reaction,,4-Electron pathway;Fe-based catalysts;Hierarchically porous structure;Oxygen reduction reaction,"Q.-L. Meng; State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: qlmeng@ciac.ac.cn; W. Xing; State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: xingwei@ciac.ac.cn; M.-L. Xiao; State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: mlxiao@ciac.ac.cn",,,,,,Science China Press,10000518,,,,Chinese,Chin. J. Appl. Chem.,Article,Scopus,,2-s2.0-85181528204,,China,ciac.ac.cn,,,"Zheng, R.-X.; Meng, Q.-L.; Zhang, L.; Liu, C.; Xing, W.; Xiao, M."
"Perez-Rodriguez, S., Torres, D., Izquierdo, M.T., Zitolo, A., Bibent, N., Sougrati, M.T., Jaouen, F., Celzard, A., Fierro, V.",Hierarchical Porous Fe3C@Fe-N-C Catalysts from Tannin-Fe(III) Complexes for Efficient Oxygen Reduction,2025,Small,21,6,2406887,,,,7,10.1002/smll.202406887,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85212785982&doi=10.1002%2Fsmll.202406887&partnerID=40&md5=75ee23fa9a916d747283299e583dad8d,"Université de Lorraine, Nancy, Grand Est, France; CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; SOLEIL Synchrotron, Gif-sur-Yvette, France; Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Institut Universitaire de France, Paris, France","Pérez-Rodríguez, S., Université de Lorraine, Nancy, Grand Est, France, CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Torres, D., Université de Lorraine, Nancy, Grand Est, France, CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Izquierdo, María T., CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Zitolo, Andrea, SOLEIL Synchrotron, Gif-sur-Yvette, France; Bibent, Nicolas, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Sougrati, Moulay T., Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Jaouen, Frédéric, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Celzard, Alain, Université de Lorraine, Nancy, Grand Est, France, Institut Universitaire de France, Paris, France; Fierro, Vanessa, Université de Lorraine, Nancy, Grand Est, France","The rational design of metal-nitrogen-doped carbons (M-N-C) from available and cost-effective sources featuring high electrocatalytic performance and stability is attractive for the development of viable low-temperature fuel cells. Herein, mimosa tannin, an abundant polyphenol easily extracted from the Mimosa plant, is used as a natural carbon source to produce a tannin-Fe(III) coordination complex. This process is assisted by Pluronic F127, which acts as both a surfactant and a promoter of Fe-N<inf>x</inf> active sites. After carbonization in the presence of urea as a nitrogen precursor, this organic tannin-Fe(III) framework produces Fe<inf>3</inf>C nanoparticles encapsulated on a Fe-N-C single-atom catalyst with hierarchical porosity. The optimal catalyst, with a Pluronic F127/mimosa tannin mass ratio of 0.5, exhibits high ORR performance in both alkaline and acidic electrolytes, with half-wave potentials of 0.87 and 0.74 V versus RHE, respectively. In addition, good performance is achieved in practical hydrogen polymer-electrolyte membrane fuel cells using OH−- or H+-conducting membranes with peak power densities of 242 and 200 mW cm−2 at cell voltages of 0.43 and 0.3 V, respectively. The synthetic approach can be explored to design new renewable M-N-C electrodes for electrochemical energy conversion or storage devices due to tannin's exceptional ability to coordinate metals. © 2024 Wiley-VCH GmbH.",Fe-Nx active sites; fuel cells; hierarchical micro-mesoporous carbon; iron carbide; oxygen reduction reaction; tannin-metal complex,Carbonization; Electrolytic reduction; Hydrogen fuels; Hydrogen storage; Iron compounds; Mesopores; Oxygen reduction reaction; Potassium Nitrate; Synthetic metals; Urea electrodes; Active site; Fe-Nx active site; Hierarchical micro-mesoporous carbon; Iron carbides; Mesoporous carbon; Nitrogen-doped carbons; Pluronic F-127; Tannin-metal complex; ]+ catalyst; Urea; carbon; coordination compound; electrolyte; ferric ion; hydrogen; iron; metal complex; nanoparticle; nitrogen; oxygen; poloxamer; polymer; polyphenol; surfactant; tannin; urea; article; atom; carbon source; carbonization; catalyst; controlled study; drug development; electric potential; electrode; energy conversion; fuel; low temperature; membrane; Mimosa; porosity; promoter region; reduction (chemistry),Fe-Nx active sites;fuel cells;hierarchical micro-mesoporous carbon;iron carbide;oxygen reduction reaction;tannin-metal complex;Carbonization;Electrolytic reduction;Hydrogen fuels;Hydrogen storage;Iron compounds;Mesopores;Potassium Nitrate;Synthetic metals;Urea electrodes;Active site;Fe-Nx active site;Iron carbides;Mesoporous carbon;Nitrogen-doped carbons;Pluronic F-127;]+ catalyst;Urea;carbon;coordination compound;electrolyte;ferric ion;hydrogen;iron;metal complex;nanoparticle;nitrogen;oxygen;poloxamer;polymer;polyphenol;surfactant;tannin;article;atom;carbon source;catalyst;controlled study;drug development;electric potential;electrode;energy conversion;fuel;low temperature;membrane;Mimosa;porosity;promoter region;reduction (chemistry),"S. Pérez-Rodríguez; Université de Lorraine, Epinal, CNRS, IJL, F-88000, France; email: sperez@icb.csic.es; V. Fierro; Université de Lorraine, Epinal, CNRS, IJL, F-88000, France; email: vanessa.fierro@univ-lorraine.fr",,,,,,John Wiley and Sons Inc,16136810,,SMALB,39711268,English,Small,Article,Scopus,,2-s2.0-85212785982,,France;Spain,icb.csic.es,,,"Perez-Rodriguez, S.; Torres, D.; Izquierdo, M.T.; Zitolo, A.; Bibent, N.; Sougrati, M.T.; Jaouen, F.; Celzard, A.; Fierro, V."
"Zhou, X., Tang, S., Yin, Y., Sun, S., Qiao, J.",Hierarchical porous N-doped graphene foams with superior oxygen reduction reactivity for polymer electrolyte membrane fuel cells,2016,Applied Energy,175,,,459,467,,52,10.1016/j.apenergy.2016.03.066,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84963532917&doi=10.1016%2Fj.apenergy.2016.03.066&partnerID=40&md5=ca5bca0f3d045eed1be68ff4c22e179d,"Donghua University, Shanghai, Shanghai, China; Institute of Functional Materials, Donghua University, Shanghai, Shanghai, China; State Key Laboratory of Engines, Tianjin University, Tianjin, China; Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada","Zhou, Xuejun, Donghua University, Shanghai, Shanghai, China; Tang, Sheng, Donghua University, Shanghai, Shanghai, China; Yin, Yan, State Key Laboratory of Engines, Tianjin University, Tianjin, China; Sun, Shuhui, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Qiao, Jinli, Donghua University, Shanghai, Shanghai, China, Institute of Functional Materials, Donghua University, Shanghai, Shanghai, China","Oxygen reduction reaction (ORR) is one of the most important processes in energy conversion and conservation such as in fuel cells, metal–air batteries and water-splitting devices. In this work, hierarchical porous N-doped graphene foams (HPGFs) functioned by a transition metal were successfully prepared using silica nanoparticles as a template. The introduction of a silica template and a transition metal provided HPGFs with a large specific surface area (918.7 m2/g) and abundant active sites. By selecting proper nitrogen precursors (cyanamide, melamine and urea), HPGFs exhibit excellent ORR catalytic activity in 0.1 M KOH with a high onset potential of 1.03 V and a limiting current of ∼9 mA cm−2, even better than that of commercial Pt/C catalysts at the same loading. Surprisingly, they show superior catalytic activity in an acidic medium with an onset potential of 0.81 V and a limiting current reaching ∼10 mA cm−2. Furthermore, the catalysts deliver good methanol tolerance and excellent long term durability after 5000 cycles of accelerated durability tests in both acidic and alkaline solutions, much better than that of a commercial Pt/C catalyst. Very inspiring cell performance was observed with HPGF-1 catalyst upon integration into a zinc–air battery. Our study presents an experimental realization of rationally designing a highly efficient ORR electrocatalyst for electrochemical energy conversion systems particular to fuel cells and metal–air batteries. © 2016 Elsevier Ltd",3-Dimensional porous graphene; Fuel cells and metal–air batteries; Nitrogen doped; Non-precious metal catalyst; Oxygen reduction reaction,Catalyst activity; Catalysts; Doping (additives); Durability; Electric batteries; Electrocatalysts; Electrolytes; Electrolytic reduction; Energy conversion; Fuel cells; Gas fuel purification; Graphene; Metal nanoparticles; Metals; Nitrogen; Oxygen; Platinum; Platinum alloys; Polyelectrolytes; Reduction; Secondary batteries; Silica; Transition metals; Urea; Metal-air battery; Nitrogen-doped; Non-precious metal catalysts; Oxygen reduction reaction; Porous graphene; Proton exchange membrane fuel cells (PEMFC); alkaline environment; carbon; catalysis; catalyst; electrochemical method; electrolyte; equipment; foam; fuel cell; methanol; nanoparticle; nitrogen; oxygen; polymer; silica; three-dimensional modeling; transition element,3-Dimensional porous graphene;Fuel cells and metal–air batteries;Nitrogen doped;Non-precious metal catalyst;Oxygen reduction reaction;Catalyst activity;Catalysts;Doping (additives);Durability;Electric batteries;Electrocatalysts;Electrolytes;Electrolytic reduction;Energy conversion;Fuel cells;Gas fuel purification;Graphene;Metal nanoparticles;Metals;Nitrogen;Oxygen;Platinum;Platinum alloys;Polyelectrolytes;Reduction;Secondary batteries;Silica;Transition metals;Urea;Metal-air battery;Nitrogen-doped;Non-precious metal catalysts;Porous graphene;Proton exchange membrane fuel cells (PEMFC);alkaline environment;carbon;catalysis;catalyst;electrochemical method;electrolyte;equipment;foam;fuel cell;methanol;nanoparticle;polymer;three-dimensional modeling;transition element,"Y. Yin; State Key Laboratory of Engines, Tianjin University, Tianjin, 92 Weijin Road, 300072, China; email: yanyin@tju.edu.cn",,,,,,Elsevier Ltd,03062619,,APEND,,English,Appl. Energy,Article,Scopus,,2-s2.0-84963532917,,China;Canada,tju.edu.cn,,,"Zhou, X.; Tang, S.; Yin, Y.; Sun, S.; Qiao, J."
"Jung, J.Y., Kim, S., Kim, J.G., Kim, M.J., Lee, K.S., Sung, Y.E., Kim, P., Yoo, S.J., Lim, H.K., Kim, N.D.",Hierarchical porous single-wall carbon nanohorns with atomic-level designed single-atom Co sites toward oxygen reduction reaction,2022,Nano Energy,97,,107206,,,,29,10.1016/j.nanoen.2022.107206,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85127511618&doi=10.1016%2Fj.nanoen.2022.107206&partnerID=40&md5=b478482644431d0b1330ee6b2cd0c1aa,"Functional Composite Materials Research Center, Korea Institute of Science and Technology, Seoul, South Korea; Department of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea; School of Chemical and Biological Engineering, Seoul National University, Seoul, South Korea; Korea Basic Science Institute, Daejeon, South Korea; Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; School of Chemical Engineering, Jeonbuk National University, Jeonju, Jeollabuk-do, South Korea; Korea Institute of Science and Technology, Seoul, South Korea; Kyung Hee University, Seoul, South Korea; Division of Energy & Environment Technology, University of Science and Technology (UST), Daejeon, South Korea; Division of Chemical Engineering and Bioengineering, Kangwon National University, Chuncheon, Gangwon-do, South Korea","Jung, Jae-young, Functional Composite Materials Research Center, Korea Institute of Science and Technology, Seoul, South Korea, Department of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea; Kim, Sungjun, School of Chemical and Biological Engineering, Seoul National University, Seoul, South Korea, Korea Basic Science Institute, Daejeon, South Korea; Kim, Jeong-gil, Functional Composite Materials Research Center, Korea Institute of Science and Technology, Seoul, South Korea; Kim, Min-ji, Functional Composite Materials Research Center, Korea Institute of Science and Technology, Seoul, South Korea; Lee, Kug-seung, Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; Sung, Yung-eun, School of Chemical and Biological Engineering, Seoul National University, Seoul, South Korea, Korea Basic Science Institute, Daejeon, South Korea; Kim, Philyong, School of Chemical Engineering, Jeonbuk National University, Jeonju, Jeollabuk-do, South Korea; Yoo, Sung Jong, Korea Institute of Science and Technology, Seoul, South Korea, Kyung Hee University, Seoul, South Korea, Division of Energy & Environment Technology, University of Science and Technology (UST), Daejeon, South Korea; Lim, Hyung-kyu, Division of Chemical Engineering and Bioengineering, Kangwon National University, Chuncheon, Gangwon-do, South Korea; Kim, Namdong, Functional Composite Materials Research Center, Korea Institute of Science and Technology, Seoul, South Korea","Hierarchical pore structure is crucial for effective mass transfer and utilization of a number of active sites in single-metal atom catalysts. Here, we present a strategy for developing a hierarchical porous structure in single-wall carbon nanohorns with Co-N<inf>x</inf> sites (Co/CNH) and maximizing their oxygen reduction activity. Thermal annealing is effective for generating hierarchical pore by removing amorphous carbons and opening internal and interstitial pore channels. Ammonia annealing modifies coordination structure and relieves local strain around cobalt atoms to form more ideal Co-N<inf>4</inf>-C moieties. DFT calculations reveal that the enhanced intrinsic catalytic activity (i<inf>k</inf> = 60.16 mA cm−2 for Co/CNH Air NH<inf>3</inf> vs. 8.24 mA cm−2 for Pt/C) is attributed to the ligand-push effect of water molecules on the other side of Co-N<inf>4</inf> sites. In a single-cell experiment, a power density of 742 mW cm−2 was achieved, which is the remarkably high value among M-N-C catalysts using commercialized membrane electrode assemblies (MEAs). © 2022",Anion exchange membrane fuel cells; Hierarchical pore structure; Oxygen reduction reaction; Single atom catalysts; Single-wall carbon nanohorns,Atoms; Catalyst activity; Electrolytic reduction; Ion exchange; Ion exchange membranes; Mass transfer; Molecules; Nanocatalysts; Oxygen; Pore structure; Proton exchange membrane fuel cells (PEMFC); Anion-exchange membrane fuel cells; Atomic levels; Effective mass; Hierarchical pore structures; Hierarchical porous; Oxygen reduction reaction; Single atom catalyst; Single wall carbon nanohorn; Single-atoms; ]+ catalyst; Ammonia,Anion exchange membrane fuel cells;Hierarchical pore structure;Oxygen reduction reaction;Single atom catalysts;Single-wall carbon nanohorns;Atoms;Catalyst activity;Electrolytic reduction;Ion exchange;Ion exchange membranes;Mass transfer;Molecules;Nanocatalysts;Oxygen;Pore structure;Proton exchange membrane fuel cells (PEMFC);Anion-exchange membrane fuel cells;Atomic levels;Effective mass;Hierarchical pore structures;Hierarchical porous;Single atom catalyst;Single wall carbon nanohorn;Single-atoms;]+ catalyst;Ammonia,"H.-K. Lim; Division of Chemical and Bioengineering, Kangwon National University, Chuncheon, 24341, South Korea; email: hklim@kangwon.ac.kr",,,,,,Elsevier Ltd,22112855,,,,English,Nano Energy,Article,Scopus,,2-s2.0-85127511618,,South Korea,kangwon.ac.kr,,,"Jung, J.Y.; Kim, S.; Kim, J.-G.; Kim, M.J.; Lee, K.-S.; Sung, Y.-E.; Kim, P.; Yoo, S.J.; Lim, H.-K.; Kim, N.D."
"Wu, R., Song, Y., Huang, X., Chen, S., Ibraheem, S., Deng, J., Li, J., Qi, X., Wei, Z.",High-density active sites porous Fe/N/C electrocatalyst boosting the performance of proton exchange membrane fuel cells,2018,Journal of Power Sources,401,,,287,295,,49,10.1016/j.jpowsour.2018.08.096,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85052879686&doi=10.1016%2Fj.jpowsour.2018.08.096&partnerID=40&md5=a178c8efd3c29b2dd1256ef47063209d,"State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China","Wu, Rui, State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China; Song, Yujie, State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China; Huang, Xun, State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China; Chen, Siguo, State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China; Ibraheem, Shumaila, State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China; Deng, Jianghai, State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China; Li, Jing, State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China; Qi, Xueqiang, State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China; Wei, Zidong, State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China","Presently, the practical application of Fe/N/C catalysts as replacements of Pt for oxygen reduction reaction is still limited by insufficient activity. Herein, we demonstrate a novel design for such catalyst. On one hand, the obtained Fe/N/C–SiO<inf>2</inf>–ZnCl<inf>2</inf> catalyst owns high densities of well-exposed active-sites derived from three-dimensional well-balanced macro-, meso-, and microporous structures constructed by adopting ZnCl<inf>2</inf> salt and SiO<inf>2</inf> microspheres as combined templates. On the other hand, simulation reveals that a high loading of catalyst in cathode catalyst layer would not benefit cell performance and fast oxygen reduction reaction process occurs only inside a limited thickness of catalyst layer. Particularly, the Fe/N/C–SiO<inf>2</inf>–ZnCl<inf>2</inf> shows a maximal output power density as high as 480 mW cm−2 at an ultra-low loading of 0.5 mg cm−2. This study firstly exhibits that development of catalysts with high-density active sites and construct of ultra-thin catalyst layer are of great significance for improving the performance of fuel cell. © 2018 Elsevier B.V.",Electrocatalyst; Fe/N/C; Fuel cells; High-density active sites; Oxygen reduction reaction,Catalyst activity; Chlorine compounds; Electrocatalysts; Electrolytic reduction; Fuel cells; Oxygen; Oxygen reduction reaction; Silica; Silicon; Zinc chloride; Active site; Catalyst layers; Cathode catalyst layers; Cell performance; High loadings; Micro-porous structure; Output power density; Oxygen Reduction; Proton exchange membrane fuel cells (PEMFC),Electrocatalyst;Fe/N/C;Fuel cells;High-density active sites;Oxygen reduction reaction;Catalyst activity;Chlorine compounds;Electrocatalysts;Electrolytic reduction;Oxygen;Silica;Silicon;Zinc chloride;Active site;Catalyst layers;Cathode catalyst layers;Cell performance;High loadings;Micro-porous structure;Output power density;Oxygen Reduction;Proton exchange membrane fuel cells (PEMFC),"Z. Wei; State Key Laboratory of Power Transmission Equipment & System Security and New Technology, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044, China; email: zdwei@cqu.edu.cn",,,,,,Elsevier B.V.,03787753,0444894810,JPSOD,,English,J Power Sources,Article,Scopus,,2-s2.0-85052879686,,China,cqu.edu.cn,,,"Wu, R.; Song, Y.; Huang, X.; Chen, S.; Ibraheem, S.; Deng, J.; Li, J.; Qi, X.; Wei, Z."
"Zhang, N., Zhou, T.P., Ge, J.K., Lin, Y., Du, Z.Y., Zhong, C.A., Wang, W.J., Jiao, Q.Y., Yuan, R.L., Tian, Y.C., Chu, W.S., Wu, C.Z., Xie, Y.",High-Density Planar-like Fe2N6 Structure Catalyzes Efficient Oxygen Reduction,2020,MATTER,3,2,,509,521,13,254,10.1016/j.matt.2020.06.026,,"[Zhou, Tianpei; Ge, Jiankai; Lin, Yue; Du, Zhiyi; Zhong, Cheng'an; Jiao, Qiyang; Yuan, Ruilin; Wu, Changzheng; Xie, Yi] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China; [Wu, Changzheng; Xie, Yi] Hefei Comprehens Natl Sci Ctr, Inst Energy, Hefei 230031, Anhui, Peoples R China; [Zhou, Tianpei; Wu, Changzheng; Xie, Yi] Univ Sci & Technol China, CAS Ctr Excellence Nanosci, Hefei 230026, Anhui, Peoples R China; [Zhang, Nan; Wang, Wenjie; Tian, Yangchao; Chu, Wangsheng] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China",,"Metal-nitrogen-carbon materials have been demonstrated as the most promising non-noble metal catalyst for proton-exchange membrane fuel cells (PEMFCs) but are still limited by the sluggish kinetics and durability ofmetal-nitrogen active sites. Here, we unravel a planar-like Fe2N6 active site as a highly efficient oxygen reduction catalyst for PEMFCs. Our developed planar-like Fe2N6 structure behaves as a distinguished catalytic mechanism for oxygen reduction, which brings synergic advantages of accelerated catalytic kinetics and highly suppressed side reaction, successfully promoting its catalytic activity and stability. As expected, the planar-like Fe2N6 structure with high density exhibits over 700% increase in mass activity than traditional isolated iron-nitrogen sites. Moreover, a PEMFC built with this catalyst also achieves a large peak power density of 845 mW cm(-2), representing a critical breakthrough for practical application of metal-nitrogen-carbon materials in PEMFC systems. Our findings will provide a new avenue toward designing highly active metal-nitrogen sites for heterogeneous catalysis.",,ACTIVE-SITES; ELECTROCATALYST; ATOMS; CARBON; DESIGN,ACTIVE-SITES;ELECTROCATALYST;ATOMS;CARBON;DESIGN,chuws@ustc.edu.cn; czwu@ustc.edu.cn; yxie@ustc.edu.cn,,"50 HAMPSHIRE ST, FLOOR 5, CAMBRIDGE, MA 02139 USA",,,,CELL PRESS,2590-2393,,,,English,MATTER-US,Article,WoS,Materials Science,WOS:000555887800003,2-s2.0-85088867109,China,ustc.edu.cn,Univ Sci & Technol China;Hefei Comprehens Natl Sci Ctr,"Univ Sci & Technol China, China;Hefei Comprehens Natl Sci Ctr, China","Zhang, Nan; Zhou, Tianpei; Ge, Jiankai; Lin, Yue; Du, Zhiyi; Zhong, Cheng'an; Wang, Wenjie; Jiao, Qiyang; Yuan, Ruilin; Tian, Yangchao; Chu, Wangsheng; Wu, Changzheng; Xie, Yi"
"Xie, H., Du, B., Huang, X., Zeng, D., Meng, H., Lin, H., Li, W., Asefa, T., Meng, Y.",High Density Single Fe Atoms on Mesoporous N-Doped Carbons: Noble Metal-Free Electrocatalysts for Oxygen Reduction Reaction in Acidic and Alkaline Media,2023,Small,19,32,2303214,,,,45,10.1002/smll.202303214,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85159089051&doi=10.1002%2Fsmll.202303214&partnerID=40&md5=7500ff158e088d8f425afa4eb7ffe7c9,"Institute of Advanced Wear & Corrosion Resistant and Functional Materials, Jinan University, Guangzhou, Guangdong, China; College of Materials Science and Engineering, Shenzhen University, Shenzhen, Guangdong, China; Hoffmann Institute of Advanced Materials, Shenzhen Polytechnic University, Shenzhen, Guangdong, China; Jinan University, Guangzhou, Guangdong, China; Department of Chemistry and Chemical Biology & Department of Chemical and Biochemical Engineering, Rutgers University–New Brunswick, New Brunswick, NJ, United States","Xie, Haifang, Institute of Advanced Wear & Corrosion Resistant and Functional Materials, Jinan University, Guangzhou, Guangdong, China; Du, Bing, College of Materials Science and Engineering, Shenzhen University, Shenzhen, Guangdong, China; Huang, Xiaoxi, Hoffmann Institute of Advanced Materials, Shenzhen Polytechnic University, Shenzhen, Guangdong, China; Zeng, Dahai, Institute of Advanced Wear & Corrosion Resistant and Functional Materials, Jinan University, Guangzhou, Guangdong, China; Meng, Hui, Jinan University, Guangzhou, Guangdong, China; Lin, Huai Jun, Institute of Advanced Wear & Corrosion Resistant and Functional Materials, Jinan University, Guangzhou, Guangdong, China; Li, Wei, Institute of Advanced Wear & Corrosion Resistant and Functional Materials, Jinan University, Guangzhou, Guangdong, China; Asefa, Tewodros C., Department of Chemistry and Chemical Biology & Department of Chemical and Biochemical Engineering, Rutgers University–New Brunswick, New Brunswick, NJ, United States; Meng, Yuying, Institute of Advanced Wear & Corrosion Resistant and Functional Materials, Jinan University, Guangzhou, Guangdong, China","It remains a challenge to develop efficient noble metal-free electrocatalysts for the oxygen reduction reaction (ORR) in various renewable energy systems. Single atom catalysts have recently drawn great attention as promising candidates both due to their high activity and their utmost atom utilization for electrocatalytic ORR. Herein, the synthesis of an efficient ORR electrocatalyst that is composed of N-doped mesoporous carbon and a high density (4.05 wt%) of single Fe atoms via pyrolysis Fe-conjugated polymer is reported. Benefiting from the abundant atomic Fe–N<inf>4</inf> sites on its conductive, mesoporous carbon structures, this material exhibits an excellent electrocatalytic activity for ORR, with positive onset potentials of 0.93 and 0.98 V in acidic and alkaline media, respectively. Its electrocatalytic performance for ORR is also comparable to that of Pt/C (20 wt%) in both media. Furthermore, it electrocatalyzes the reaction almost fully to H<inf>2</inf>O (or barely to H<inf>2</inf>O<inf>2</inf>). Additionally, it is durable and tolerates the methanol crossover reaction well. Furthermore, a proton exchange membrane fuel cell and a zinc–air battery assembled using it on their cathode deliver high maximum power densities (320 and 91 mW cm−2, respectively). Density functional theory calculation reveals that the material's decent electrocatalytic performance for ORR is due to its atomically dispersed Fe–N<inf>4</inf> sites. © 2023 Wiley-VCH GmbH.",electrocatalysis; iron; N-doped mesoporous carbon; oxygen reduction reaction; single atom catalysts,Atoms; Carbon; Conjugated polymers; Density functional theory; Doping (additives); Electrocatalysts; Electrolytic reduction; Iron; Mesoporous materials; Oxygen; Precious metals; Proton exchange membrane fuel cells (PEMFC); Renewable energy resources; Acidic media; Alkaline media; Electrocatalytic performance; Fe atoms; Metal-free electrocatalysts; N-doped mesoporous carbons; Oxygen reduction reaction; Single atom catalyst; Single-atoms; ]+ catalyst; Electrocatalysis,electrocatalysis;iron;N-doped mesoporous carbon;oxygen reduction reaction;single atom catalysts;Atoms;Carbon;Conjugated polymers;Density functional theory;Doping (additives);Electrocatalysts;Electrolytic reduction;Mesoporous materials;Oxygen;Precious metals;Proton exchange membrane fuel cells (PEMFC);Renewable energy resources;Acidic media;Alkaline media;Electrocatalytic performance;Fe atoms;Metal-free electrocatalysts;N-doped mesoporous carbons;Single atom catalyst;Single-atoms;]+ catalyst,"Y. Meng; Institute of Advanced Wear & Corrosion Resistant and Functional Materials, Jinan University, Guangzhou, 601 Huangpu Avenue West, 510632, China; email: yymeng9169@jnu.edu.cn; T. Asefa; Department of Chemistry and Chemical Biology & Department of Chemical and Biochemical Engineering, Rutgers, 610 Taylor Road, The State University of New Jersey, Piscataway, 08854, United States; email: tasefa@chem.rutgers.edu",,,,,,John Wiley and Sons Inc,16136810,,SMALB,37170674,English,Small,Article,Scopus,,2-s2.0-85159089051,,China;United States,jnu.edu.cn,,,"Xie, H.; Du, B.; Huang, X.; Zeng, D.; Meng, H.; Lin, H.; Li, W.; Asefa, T.; Meng, Y."
"Kim, S.J., Nahm, K.S., Kim, P.",High electrocatalytic performance of NH 3-activated iron-adsorbed polyaniline for oxygen reduction reactions,2012,Catalysis Letters,142,10,,1244,1250,,14,10.1007/s10562-012-0881-6,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84868488053&doi=10.1007%2Fs10562-012-0881-6&partnerID=40&md5=81f0c574434cba1647c48c21e4f7ede9,"Department of Hydrogen and Fuel Cells Engineering, Jeonbuk National University, Jeonju, Jeollabuk-do, South Korea; School of Semiconductor and Chemical Engineering, Jeonbuk National University, Jeonju, Jeollabuk-do, South Korea","Kim, Sojeong, Department of Hydrogen and Fuel Cells Engineering, Jeonbuk National University, Jeonju, Jeollabuk-do, South Korea; Nahm, Kee-suck, Department of Hydrogen and Fuel Cells Engineering, Jeonbuk National University, Jeonju, Jeollabuk-do, South Korea, School of Semiconductor and Chemical Engineering, Jeonbuk National University, Jeonju, Jeollabuk-do, South Korea; Kim, Philyong, Department of Hydrogen and Fuel Cells Engineering, Jeonbuk National University, Jeonju, Jeollabuk-do, South Korea, School of Semiconductor and Chemical Engineering, Jeonbuk National University, Jeonju, Jeollabuk-do, South Korea","We demonstrate how a highly active non-precious metal-based catalyst for oxygen reduction reactions (ORRs) can be prepared using commercially available polyaniline (PANI) as both nitrogen source and carbon precursor. To do this, PANI-derived catalysts are prepared by pyrolyzing PANI and Fe-impregnated PANI (Fe-PANI) in either N <inf>2</inf> or NH <inf>3</inf> atmospheres. When the catalyst precursor is pyrolyzed under an NH <inf>3</inf> stream, the resultant catalysts (PANI-A and Fe-PANI-A; A denotes treatment with ammonia) have higher microporosities and pyridinic nitrogen contents than those of N <inf>2</inf>-pyrolyzed catalysts (PANI-N and Fe-PANI-N; N denotes treatment with nitrogen). Microporosity produced by pyrolysis and pyridinic nitrogen contents are important factors for ORR activity, which is borne out by the better ORR performance of NH <inf>3</inf>-pyrolyzed catalysts compared to N <inf>2</inf>-pyrolyzed samples. In addition, Fe species coordinated with nitrogen serve as a highly active site to facilitate ORR, leading to Fe-PANI-A delivering the best ORR performance among the PANI-derived catalysts. The onset and half-wave potentials of Fe-PANI-A for ORR were measured as 0.916 and 0.787 mV, respectively, better than for commercial Pd/ C. Although some degradation in ORR activity of Fe- PANI-A is observed after a durability test, the loss in the half-wave potential is only 52 mV, indicating a relatively stable ORR activity for Fe-PANI-A. © Springer Science+Business Media New York 2012.",Cathode catalyst; Non-precious metal catalyst; Oxygen reduction reaction (ORR); Polyaniline (PANI); Polymer electrolyte fuel cells (PEMFCS),Active site; Carbon precursors; Catalyst precursors; Cathode catalyst; Durability test; Electrocatalytic performance; Fe species; Half-wave potential; Metal-based catalysts; Nitrogen sources; Non-precious metal catalysts; Oxygen reduction reaction; Polymer electrolyte fuel cells; Pyridinic nitrogen; Pyrolyzing; Durability; Electrolytic reduction; Microporosity; Nitrogen; Polyaniline; Precious metals; Proton exchange membrane fuel cells (PEMFC); Pyrolysis; Catalyst activity,Cathode catalyst;Non-precious metal catalyst;Oxygen reduction reaction (ORR);Polyaniline (PANI);Polymer electrolyte fuel cells (PEMFCS);Active site;Carbon precursors;Catalyst precursors;Durability test;Electrocatalytic performance;Fe species;Half-wave potential;Metal-based catalysts;Nitrogen sources;Non-precious metal catalysts;Oxygen reduction reaction;Polymer electrolyte fuel cells;Pyridinic nitrogen;Pyrolyzing;Durability;Electrolytic reduction;Microporosity;Nitrogen;Polyaniline;Precious metals;Proton exchange membrane fuel cells (PEMFC);Pyrolysis;Catalyst activity,"P. Kim; Department of Hydrogen and Fuel Cell Engineering, Specialized Graduate School, Chonbuk National University, Jeonju 561-756, South Korea; email: kimpil1@chonbuk.ac.kr",,,,,,,1011372X,,CALEE,,English,Catal Lett,Article,Scopus,,2-s2.0-84868488053,,South Korea,chonbuk.ac.kr,,,"Kim, S.J.; Nahm, K.S.; Kim, P."
"Chen, G., An, Y., Liu, S., Sun, F., Qi, H., Wu, H., He, Y., Liu, P., Shi, R., Zhang, J., Kuc, A., Kaiser, U., Zhang, T., Heine, T., Wu, G., Feng, X.",Highly accessible and dense surface single metal FeN4 active sites for promoting the oxygen reduction reaction,2022,Energy and Environmental Science,15,6,,2619,2628,,170,10.1039/d2ee00542e,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85132970451&doi=10.1039%2Fd2ee00542e&partnerID=40&md5=838ad0b9413c3c5096b36a7c3d9990a1,"Faculty of Chemistry and Food Chemistry, Center for Advancing Electronics Dresden, Dresden, Sachsen, Germany; Department of Theoretical Chemistry, Technische Universität Dresden, Dresden, Sachsen, Germany; Abteilung Ressourcenökologie, HZDR - Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Sachsen, Germany; School of Engineering and Applied Sciences, Buffalo, NY, United States; Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China; Electron Microscopy Group of Materials Science, Universität Ulm, Ulm, Baden-Wurttemberg, Germany; School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China; Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Sciences, Beijing, China; Department of Applied Chemistry, Northwestern Polytechnical University, Xi'an, Shaanxi, China; Department of Chemistry, Yonsei University, Seoul, South Korea; Department of Synthetic Materials and Functional Devices, Max Planck Institute of Microstructure Physics, Halle, Sachsen-Anhalt, Germany","Chen, Guangbo, Faculty of Chemistry and Food Chemistry, Center for Advancing Electronics Dresden, Dresden, Sachsen, Germany; An, Yun, Department of Theoretical Chemistry, Technische Universität Dresden, Dresden, Sachsen, Germany, Abteilung Ressourcenökologie, HZDR - Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Sachsen, Germany; Liu, Shengwen, School of Engineering and Applied Sciences, Buffalo, NY, United States; Sun, Fanfei, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China; Qi, Haoyuan, Faculty of Chemistry and Food Chemistry, Center for Advancing Electronics Dresden, Dresden, Sachsen, Germany, Electron Microscopy Group of Materials Science, Universität Ulm, Ulm, Baden-Wurttemberg, Germany; Wu, Haofei, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China; He, Yanghua, School of Engineering and Applied Sciences, Buffalo, NY, United States; Liu, Pan, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China; Shi, Run, Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Sciences, Beijing, China; Zhang, Jian, Department of Applied Chemistry, Northwestern Polytechnical University, Xi'an, Shaanxi, China; Kuc, Agnieszka Beata, Abteilung Ressourcenökologie, HZDR - Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Sachsen, Germany; Kaiser, Ute, Electron Microscopy Group of Materials Science, Universität Ulm, Ulm, Baden-Wurttemberg, Germany; Zhang, Tierui, Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Sciences, Beijing, China; Heine, Thomas, Department of Theoretical Chemistry, Technische Universität Dresden, Dresden, Sachsen, Germany, Abteilung Ressourcenökologie, HZDR - Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Sachsen, Germany, Department of Chemistry, Yonsei University, Seoul, South Korea; Wu, Gang, School of Engineering and Applied Sciences, Buffalo, NY, United States; Feng, Xinliang, Faculty of Chemistry and Food Chemistry, Center for Advancing Electronics Dresden, Dresden, Sachsen, Germany, Department of Synthetic Materials and Functional Devices, Max Planck Institute of Microstructure Physics, Halle, Sachsen-Anhalt, Germany","Single iron atom and nitrogen-codoped carbon (Fe-N-C) electrocatalysts, which have great potential to catalyze the kinetically sluggish oxygen reduction reaction (ORR), have been recognized as the most promising alternatives to the precious metal platinum. Unfortunately, the ORR properties of the existing Fe-N-C catalysts are significantly hampered by the inferior accessibility and intrinsic activity of FeN<inf>4</inf> moieties. Here, we constructed densely exposed surface FeN<inf>4</inf> moieties on a hierarchically porous carbon (sur-FeN<inf>4</inf>-HPC) by Fe ion anchoring and a subsequent pyrolysis strategy using the nitrogen-doped hierarchically porous carbon (NHPC) as the scaffold. The high surface area of the NHPC with abundant surface Fe anchoring sites enabled the successful fabrication of densely accessible FeN<inf>4</inf> active moieties (34.7 × 1019 sites g−1) on sur-FeN<inf>4</inf>-HPC. First-principles calculations further suggested that the edge effect could regulate the electronic structure of the single Fe site, hence promoting the intrinsic ORR activity of the FeN<inf>4</inf> moiety. As a result, the sur-FeN<inf>4</inf>-HPC electrocatalyst exhibited excellent ORR activity in acidic media with a high half-wave potential of 0.83 V (vs. the reversible hydrogen electrode). We further examined sur-FeN<inf>4</inf>-HPC as a cathode catalyst in proton exchange membrane fuel cells (PEMFCs). The membrane electrode assembly delivered a high current density of 24.2 mA cm−2 at 0.9 V<inf>iR-free</inf> (internal resistance-compensated voltage) under 1.0 bar O<inf>2</inf> and a maximum peak power density of 0.412 W cm−2 under 1.0 bar air. Importantly, the catalyst demonstrated promising durability during 30 000 voltage cycles under harsh H<inf>2</inf> and air conditions. The PEMFC performance of sur-FeN<inf>4</inf>-HPC outperforms those of the previously reported Fe-N-C electrocatalysts. The engineering of highly accessible and dense surface FeN<inf>4</inf> sites on sur-FeN<inf>4</inf>-HPC offers a fruitful pathway for designing high-performance electrocatalysts for different electrochemical processes. © 2022 The Royal Society of Chemistry.",,Calculations; Carbon; Doping (additives); Electrodes; Electrolysis; Electrolytic reduction; Electronic structure; Iron; Iron compounds; Nitrogen; Oxygen; Porous materials; Proton exchange membrane fuel cells (PEMFC); Active site; Anchorings; Dense surface; Hierarchically porous carbons; Iron nitrogen; Nitrogen-doped; Oxygen reduction reaction; Proton-exchange membranes fuel cells; Reaction activity; ]+ catalyst; Electrocatalysts; accessibility; edge effect; metal; reduction,Calculations;Carbon;Doping (additives);Electrodes;Electrolysis;Electrolytic reduction;Electronic structure;Iron;Iron compounds;Nitrogen;Oxygen;Porous materials;Proton exchange membrane fuel cells (PEMFC);Active site;Anchorings;Dense surface;Hierarchically porous carbons;Iron nitrogen;Nitrogen-doped;Oxygen reduction reaction;Proton-exchange membranes fuel cells;Reaction activity;]+ catalyst;Electrocatalysts;accessibility;edge effect;metal;reduction,"T. Heine; Theoretical Chemistry, Technische Universität Dresden, Dresden, 01062, Germany; email: thomas.heine@tu-dresden.de; G. Wu; Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, 14260, United States; email: gangwu@buffalo.edu; X. Feng; Center for Advancing Electronics Dresden (Cfaed), Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Dresden, 01062, Germany; email: xinliang.feng@tu-dresden.de",,,,,,Royal Society of Chemistry,17545692,,,,English,Energy Environ. Sci.,Article,Scopus,,2-s2.0-85132970451,,Germany;United States;China;South Korea,tu-dresden.de,,,"Chen, G.; An, Y.; Liu, S.; Sun, F.; Qi, H.; Wu, H.; He, Y.; Liu, P.; Shi, R.; Zhang, J.; Kuc, A.; Kaiser, U.; Zhang, T.; Heine, T.; Wu, G.; Feng, X."
"Guo, J.N., Li, B.J., Zhang, Q.Y., Liu, Q.T., Wang, Z.L., Zhao, Y.F., Shui, J.L., Xiang, Z.H.",Highly Accessible Atomically Dispersed Fe-Nx Sites Electrocatalyst for Proton-Exchange Membrane Fuel Cell,2021,ADVANCED SCIENCE,8,5,2002249,,,7,95,10.1002/advs.202002249,,"[Guo, Jianing; Zhang, Qiyu; Xiang, Zhonghua] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, Beijing 100029, Peoples R China; [Guo, Jianing] Hebei Normal Univ, Coll Chem & Mat Sci, Hebei Key Lab Inorgan Nanomat, Shijiazhuang 050024, Hebei, Peoples R China; [Li, Bingjie] Zhengzhou Univ, Affiliated Hosp 1, Dept Oncol, 1 Jianshe St, Zhengzhou 450052, Henan, Peoples R China; [Liu, Qingtao; Shui, Jianglan] Beihang Univ, Sch Mat Sci & Engn, Beijing, Peoples R China; [Wang, Zelin; Zhao, Yufei] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China",,"Atomically dispersed transition metal-N-x sites have emerged as a frontier for electrocatalysis because of the maximized atom utilization. However, there is still the problem that the reactant is difficult to reach active sites inside the catalytic layer in the practical proton exchange membrane fuel cell (PEMFC) testing, resulting in the ineffective utilization of the deeply hided active sites. In the device manner, the favorite structure of electrocatalysts for good mass transfer is vital for PEMFC. Herein, a facile one-step approach to synthesize atomically dispersed Fe-N-x species on hierarchically porous carbon nanostructures as a high-efficient and stable atomically dispersed catalyst for oxygen reduction in acidic media is reported, which is achieved by a predesigned hierarchical covalent organic polymer (COP) with iron anchored. COP materials with well-defined building blocks can stabilize the dopants and provide efficient mass transport. The appropriate hierarchical pore structure is proved to facilitate the mass transport of reactants to the active sites, ensuring the utilization of active sites in devices. Particularly, the structurally optimized HSAC/Fe-3 displays a maximum power density of up to 824 mW cm(-2), higher than other samples with fewer mesopores. Accordingly, this work will offer inspirations for designing efficient atomically dispersed electrocatalyst in PEMFC device.",acidic media; covalent organic polymer; oxygen reduction reaction; proton exchange membrane fuel cells; single-atom catalysts,OXYGEN REDUCTION REACTION; ACTIVE-SITES; CARBON; IRON; ARCHITECTURES,acidic media;covalent organic polymer;oxygen reduction reaction;proton exchange membrane fuel cells;single-atom catalysts;ACTIVE-SITES;CARBON;IRON;ARCHITECTURES,bingjie.li@monash.edu; shuijianglan@buaa.edu.cn; xiangzh@mail.buct.edu.cn,,"111 RIVER ST, HOBOKEN 07030-5774, NJ USA",,,,WILEY,,,,33717836,English,ADV SCI,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science,WOS:000612636000001,2-s2.0-85099849409,China,monash.edu,Beijing Univ Chem Technol;Hebei Normal Univ;Zhengzhou Univ;Beihang Univ,"Beijing Univ Chem Technol, China;Hebei Normal Univ, China;Zhengzhou Univ, China;Beihang Univ, China","Guo, Jianing; Li, Bingjie; Zhang, Qiyu; Liu, Qingtao; Wang, Zelin; Zhao, Yufei; Shui, Jianglan; Xiang, Zhonghua"
"Karthikayini, M.P., Thirupathi, T., Wang, G., Ramani, V., Kothandaraman, R.K.",Highly active and durable non-precious metal catalyst for the oxygen reduction reaction in acidic medium,2016,Journal of the Electrochemical Society,163,6,,F539,F547,,35,10.1149/2.1001606jes,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84963621290&doi=10.1149%2F2.1001606jes&partnerID=40&md5=32414be4078d8efb7ec41c12ce8b3808,"Department of Chemistry, Indian Institute of Technology Madras, Chennai, TN, India; Armour College of Engineering, Chicago, IL, United States","Karthikayini, M. P., Department of Chemistry, Indian Institute of Technology Madras, Chennai, TN, India; Thirupathi, T., Department of Chemistry, Indian Institute of Technology Madras, Chennai, TN, India; Wang, Guanxiong, Armour College of Engineering, Chicago, IL, United States; Ramani, Vijay K., Armour College of Engineering, Chicago, IL, United States; Kothandaraman, Ramanujam, Department of Chemistry, Indian Institute of Technology Madras, Chennai, TN, India","Polymer electrolyte fuel cells exhibit high potentials at the cathode during start-stop cycles in automotive applications, which leads to carbon support corrosion, and concomitant loss of electrocatalytic activity. In this study, carbon nanomaterials (CNM), predominantly composed of nitrogen doped multi-walled carbon nanotubes (N-MWCNTs) with encapsulated cobalt nanoparticles, were synthesized in-situ by the solid-state pyrolysis (SSP) of melamine and cobalt Oxide (Co<inf>3</inf>O<inf>4</inf>). The best formulation of the catalyst exhibited an ORR activity of of 2.3 mA cm-2 at 0.75 V vs. RHE (4.6 mA mg-1). The role played by cobalt to complete the active site was demonstrated as follows: Upon complexing the cobalt site with bipyridine, the ORR onset potential decreased by ∼90 mV. The stability of the above non-precious metal (NPM) catalyst was studied through accelerated stress tests (ASTs) designed to mimic load cycling and start-stop cycling protocols, wherein the catalyst was exposed to high anodic potentials (up to 1.5 V vs. RHE) in an acidic medium. In rotating disk electrode mode, the ORR polarization curve shifted to more negative values by about 20 mV and 14 mV, respectively, after the load cycling and start-stop cycling AST protocols, suggesting high stability. Similar stability was observed in fuel cell mode. © 2016 The Electrochemical Society.",,Catalysts; Cobalt; Cobalt compounds; Doping (additives); Electrodes; Electrolytes; Electrolytic reduction; Fuel cells; Multiwalled carbon nanotubes (MWCN); Polyelectrolytes; Precious metals; Proton exchange membrane fuel cells (PEMFC); Rotating disks; Synthesis (chemical); Yarn; Automotive applications; Carbon nano-materials; Cobalt nanoparticles; Electrocatalytic activity; Non-precious metal catalysts; Oxygen reduction reaction; Polymer electrolyte fuel cells; Rotating disk electrodes; Catalyst activity,Catalysts;Cobalt;Cobalt compounds;Doping (additives);Electrodes;Electrolytes;Electrolytic reduction;Fuel cells;Multiwalled carbon nanotubes (MWCN);Polyelectrolytes;Precious metals;Proton exchange membrane fuel cells (PEMFC);Rotating disks;Synthesis (chemical);Yarn;Automotive applications;Carbon nano-materials;Cobalt nanoparticles;Electrocatalytic activity;Non-precious metal catalysts;Oxygen reduction reaction;Polymer electrolyte fuel cells;Rotating disk electrodes;Catalyst activity,,,,,,,Electrochemical Society Inc. ecs@electrochem.org,00134651,,JESOA,,English,J Electrochem Soc,Article,Scopus,,2-s2.0-84963621290,,India;United States,No email,,,"Karthikayini, M.P.; Thirupathi, T.; Wang, G.; Ramani, V.; Kothandaraman, R.K."
"Zamani, P., Higgins, D.C., Hassan, F.M., Fu, X., Choi, J.Y., Hoque, M.A., Jiang, G., Chen, Z.",Highly active and porous graphene encapsulating carbon nanotubes as a non-precious oxygen reduction electrocatalyst for hydrogen-air fuel cells,2016,Nano Energy,26,,,267,275,,65,10.1016/j.nanoen.2016.05.035,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84971294350&doi=10.1016%2Fj.nanoen.2016.05.035&partnerID=40&md5=d445e633259b820b0ad87879f5da49fc,"Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada","Zamani, Pouyan, Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada; Higgins, Drew C., Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada; Hassan, Fathy Mohamed Bayoumi, Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada; Fu, Xiaogang, Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada; Choi, Ja-yeon, Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada; Hoque, Md Ariful, Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada; Jiang, Gaopeng, Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada; Chen, Zhongwei, Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada","Heat treated iron-polyaniline-carbon - based non-precious metal catalysts represent a promising class of material to replace the platinum based ORR catalysts for PEMFC technologies. In the present research, we apply an ammonia treatment to tune the structure and activity of electrocatalysts derived from iron, polyaniline and carbon nanotubes (CNTs). By controlling the NH<inf>3</inf> reaction conditions, we were able to tune the chemistry of nitrogen incorporation, including concentration and dopant type. The final catalyst had a robust morphology consisting of highly porous 2-D in-situ formed graphene-like structures that, along with the intermixed 1-D CNTs, were decorated with an abundance of nitrogen and iron species. The resultant surface chemistry led to impressive catalyst activity, with a half-wave potential of 0.81 V observed through half-cell testing and under H<inf>2</inf>-air fuel cell testing, a current density of 77 mA cm-2 at 0.8 V was achieved, along with a maximum power density of 335 mW cm-2. © 2016 Elsevier Ltd.",Carbon nanotube; Fuel cells; In-situ graphene; Non-precious catalyst; Oxygen reduction; Polyaniline,Carbon nanotubes; Catalysts; Electrocatalysts; Electrolysis; Electrolytic reduction; Fuel cells; Graphene; Iron; Iron research; Nanotubes; Nitrogen; Polyaniline; Proton exchange membrane fuel cells (PEMFC); Surface chemistry; Yarn; Hydrogen air fuel cell; Maximum power density; Nitrogen incorporation; Non-precious catalysts; Non-precious metal catalysts; Oxygen Reduction; Reaction conditions; Structure and activities; Catalyst activity,Carbon nanotube;Fuel cells;In-situ graphene;Non-precious catalyst;Oxygen reduction;Polyaniline;Carbon nanotubes;Catalysts;Electrocatalysts;Electrolysis;Electrolytic reduction;Graphene;Iron;Iron research;Nanotubes;Nitrogen;Proton exchange membrane fuel cells (PEMFC);Surface chemistry;Yarn;Hydrogen air fuel cell;Maximum power density;Nitrogen incorporation;Non-precious catalysts;Non-precious metal catalysts;Reaction conditions;Structure and activities;Catalyst activity,"Z. Chen; Department of Chemical Engineering, University of Waterloo, Waterloo, 200 University Ave. W., N2L 3G1, Canada; email: zhwchen@uwaterloo.ca",,,,,,Elsevier Ltd,22112855,,,,English,Nano Energy,Article,Scopus,,2-s2.0-84971294350,,Canada,uwaterloo.ca,,,"Zamani, P.; Higgins, D.C.; Hassan, F.M.; Fu, X.; Choi, J.-Y.; Hoque, M.A.; Jiang, G.; Chen, Z."
"Wang, G., He, Y., Hwang, S., Cullen, D.A., Uddin, M.A., Langhorst, L., Li, B., Karakalos, S., Kropf, A.J., Wegener, E.C., Sokolowski, J., Chen, M., Myers, D.J., Su, D., More, K.L., Litster, S., Wu, G.",Highly active atomically dispersed CoN 4 fuel cell cathode catalysts derived from surfactant-assisted MOFs: Carbon-shell confinement strategy,2019,Energy and Environmental Science,12,1,,250,260,,814,10.1039/c8ee02694g,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85060310874&doi=10.1039%2Fc8ee02694g&partnerID=40&md5=664862d3cc04e37ae96e9795d4953e3b,"School of Engineering and Applied Sciences, Buffalo, NY, United States; Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, United States; Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States; College of Engineering, Pittsburgh, PA, United States; Swanson School of Engineering, Pittsburgh, PA, United States; Molinaroli College of Engineering and Computing, Columbia, SC, United States; Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States","Wang, Guofeng, School of Engineering and Applied Sciences, Buffalo, NY, United States, Swanson School of Engineering, Pittsburgh, PA, United States; He, Yanghua, School of Engineering and Applied Sciences, Buffalo, NY, United States; Hwang, Sooyeon, Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, United States; Cullen, David A., Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Uddin, Aman Aman, College of Engineering, Pittsburgh, PA, United States; Langhorst, Lisa, College of Engineering, Pittsburgh, PA, United States; Li, Boyang, Swanson School of Engineering, Pittsburgh, PA, United States; Karakalos, Stavros G., Molinaroli College of Engineering and Computing, Columbia, SC, United States; Kropf, Arthur Jeremy, Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Wegener, Evan C., Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Sokolowski, Joshua, School of Engineering and Applied Sciences, Buffalo, NY, United States; Chen, Mengjie, School of Engineering and Applied Sciences, Buffalo, NY, United States; Myers, Deborah J., Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Su, Dong, Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States; More, Karren L., Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Litster, Shawn E., College of Engineering, Pittsburgh, PA, United States; Wu, Gang, School of Engineering and Applied Sciences, Buffalo, NY, United States","Development of platinum group metal (PGM)-free catalysts for oxygen reduction reaction (ORR) is essential for affordable proton exchange membrane fuel cells. Herein, a new type of atomically dispersed Co doped carbon catalyst with a core-shell structure has been developed via a surfactant-assisted metal-organic framework approach. The cohesive interactions between the selected surfactant and the Co-doped zeolitic imidazolate framework (ZIF-8) nanocrystals lead to a unique confinement effect. During the thermal activation, this confinement effect suppressed the agglomeration of Co atomic sites and mitigated the collapse of internal microporous structures of ZIF-8. Among the studied surfactants, Pluronic F127 block copolymer led to the greatest performance gains with a doubling of the active site density relative to that of the surfactant-free catalyst. According to density functional theory calculations, unlike other Co catalysts, this new atomically dispersed Co-N-C@F127 catalyst is believed to contain substantial CoN <inf>2+2</inf> sites, which are active and thermodynamically favorable for the four-electron ORR pathway. The Co-N-C@F127 catalyst exhibits an unprecedented ORR activity with a half-wave potential (E <inf>1/2</inf> ) of 0.84 V (vs. RHE) as well as enhanced stability in the corrosive acidic media. It also demonstrated high initial performance with a power density of 0.87 W cm -2 along with encouraging durability in H <inf>2</inf> -O <inf>2</inf> fuel cells. The atomically dispersed Co site catalyst approaches that of the Fe-N-C catalyst and represents the highest reported PGM-free and Fe-free catalyst performance. © 2019 The Royal Society of Chemistry.",,Block copolymers; Carbon; Catalyst activity; Cobalt; Crystalline materials; Density functional theory; Electrolytic reduction; Iron compounds; Organometallics; Surface active agents; Catalyst performance; Cohesive interactions; Core shell structure; Metal organic framework; Micro-porous structure; Oxygen reduction reaction; Platinum group metals; Zeolitic imidazolate frameworks; Proton exchange membrane fuel cells (PEMFC); catalyst; durability; electrode; fuel cell; organometallic compound; performance assessment; reduction; shell; surfactant; thermodynamics,Block copolymers;Carbon;Catalyst activity;Cobalt;Crystalline materials;Density functional theory;Electrolytic reduction;Iron compounds;Organometallics;Surface active agents;Catalyst performance;Cohesive interactions;Core shell structure;Metal organic framework;Micro-porous structure;Oxygen reduction reaction;Platinum group metals;Zeolitic imidazolate frameworks;Proton exchange membrane fuel cells (PEMFC);catalyst;durability;electrode;fuel cell;organometallic compound;performance assessment;reduction;shell;surfactant;thermodynamics,"G. Wang; Department of Chemical and Biological Engineering, University at Buffalo, State University of New York, Buffalo, 14260, United States; email: guw8@pitt.edu",,,,,,Royal Society of Chemistry,17545692,,,,English,Energy Environ. Sci.,Article,Scopus,,2-s2.0-85060310874,,United States,pitt.edu,,,"Wang, G.; He, Y.; Hwang, S.; Cullen, D.A.; Uddin, M.A.; Langhorst, L.; Li, B.; Karakalos, S.; Kropf, A.J.; Wegener, E.C.; Sokolowski, J.; Chen, M.; Myers, D.J.; Su, D.; More, K.L.; Litster, S.; Wu, G."
"Teppor, P., Jager, R., Hints, J., Volobujeva, O., Valk, P., Koppel, M., Lust, E.",Highly active Fe-N/C oxygen electrocatalysts based on silicon carbide derived carbon,2020,ECS Transactions,98,9,,607,615,,3,10.1149/09809.0607ecst,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85092674396&doi=10.1149%2F09809.0607ecst&partnerID=40&md5=8f4a7184f00e89906b5a3dd3d46601b1,"Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Department of Materials Science, Tallinna Tehnikaülikool, Tallinn, Harjumaa, Estonia","Teppor, Patrick, Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Jäger, Rutha, Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Hints, J., Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Volobujeva, Olga, Department of Materials Science, Tallinna Tehnikaülikool, Tallinn, Harjumaa, Estonia; Valk, Peeter, Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Koppel, Miriam, Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Lust, Enn I., Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia","In this work oxygen reduction catalysts were synthesized by modifying silicon carbide derived carbon with Fe and N through ball milling. The presence of a process control agent and grinding ball diameter in the milling step were varied in order to study their effect on both the physical and electrochemical characteristics of the catalysts prepared. It was established that the ball diameter and process control agent can noticeably impact the surface morphology, particle size distribution, and specific surface area of the materials. Despite these differences, similar high half-wave potential values of 0.85 V vs RHE in alkaline media were established for all the catalysts. However, the electrochemical performance of the materials varied considerably in a PEMFC experiment. More specifically, particle size distribution and specific surface area appear to be important parameters when studying non-platinum group metal catalysts in single cell setups. © The Electrochemical Society",,Ball milling; Carbon; Electrocatalysts; Electrolytic reduction; Light transmission; Milling (machining); Morphology; Particle size; Particle size analysis; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Silicon carbide; Size distribution; Specific surface area; Surface morphology; Alkaline media; Carbide derived carbon; Electrochemical characteristics; Electrochemical performance; Grinding balls; Half-wave potential; Oxygen reduction catalysts; Process control agents; Process control,Ball milling;Carbon;Electrocatalysts;Electrolytic reduction;Light transmission;Milling (machining);Morphology;Particle size;Particle size analysis;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Silicon carbide;Size distribution;Specific surface area;Surface morphology;Alkaline media;Carbide derived carbon;Electrochemical characteristics;Electrochemical performance;Grinding balls;Half-wave potential;Oxygen reduction catalysts;Process control agents;Process control,,"Swider-Lyons, K.; Uchida, H.; Pintauro, P.N.; Mustain, W.; Buechi, F.; Pivovar, B.S.; Rice, C.A.; Fenton, J.M.; Strasser, P.; Ayers, K.E.; Weber, A.Z.; Mantz, R.A.; Xu, H.; Mitsushima, S.; Kjeang, E.; Schmidt, T.J.; Lakshmanan, B.; Kusoglu, A.; Jia, H.; Jones, D.J.; Ha, D.H.; Kim, S.K.",,"Pacific Rim Meeting on Electrochemical and Solid State Science 2020, PRiME 200",Honolulu,2020-10-04 through 2020-10-09,IOP Publishing Ltd,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-85092674396,,Estonia,No email,,,"Teppor, P.; Jager, R.; Hints, J.; Volobujeva, O.; Valk, P.; Koppel, M.; Lust, E."
"Barkholtz, H.M., Chong, L.N., Kaiser, Z.B., Xu, T., Liu, D.J.",Highly Active Non-PGM Catalysts Prepared from Metal Organic Frameworks,2015,CATALYSTS,5,2,,955,965,11,40,10.3390/catal5020955,,"[Barkholtz, Heather M.; Chong, Lina; Kaiser, Zachary B.; Liu, Di-Jia] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA; [Barkholtz, Heather M.; Xu, Tao] No Illinois Univ, Dept Chem & Biochem, De Kalb, IL 60115 USA",,"Finding inexpensive alternatives to platinum group metals (PGMs) is essential for reducing the cost of proton exchange membrane fuel cells (PEMFCs). Numerous materials have been investigated as potential replacements of Pt, of which the transition metal and nitrogen-doped carbon composites (TM/N-x/C) prepared from iron doped zeolitic imidazolate frameworks (ZIFs) are among the most active ones in catalyzing the oxygen reduction reaction based on recent studies. In this report, we demonstrate that the catalytic activity of ZIF-based TM/N-x/C composites can be substantially improved through optimization of synthesis and post-treatment processing conditions. Ultimately, oxygen reduction reaction (ORR) electrocatalytic activity must be demonstrated in membrane-electrode assemblies (MEAs) of fuel cells. The process of preparing MEAs using ZIF-based non-PGM electrocatalysts involves many additional factors which may influence the overall catalytic activity at the fuel cell level. Evaluation of parameters such as catalyst loading and perfluorosulfonic acid ionomer to catalyst ratio were optimized. Our overall efforts to optimize both the catalyst and MEA construction process have yielded impressive ORR activity when tested in a fuel cell system.",non-PGM catalyst; proton exchange membrane fuel cell (PEMFC); oxygen reduction reaction (ORR); zeolitic imidazolate framework (ZIF),OXYGEN REDUCTION REACTION; FUEL-CELL APPLICATIONS; NITROGEN-DOPED CARBON; ELECTROCATALYSTS; CHALLENGES; PERFORMANCE; PEMFC; BLACK; LAYER,non-PGM catalyst;proton exchange membrane fuel cell (PEMFC);oxygen reduction reaction (ORR);zeolitic imidazolate framework (ZIF);OXYGEN REDUCTION REACTION;FUEL-CELL APPLICATIONS;NITROGEN-DOPED CARBON;ELECTROCATALYSTS;CHALLENGES;PERFORMANCE;PEMFC;BLACK;LAYER,barkholtz@anl.gov; chonglina@anl.gov; zkaiser@anl.gov; txu@niu.edu; djliu@anl.gov,,"ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND",,,,MDPI AG,2073-4344,,,,English,CATALYSTS,Article,WoS,Chemistry,WOS:000357267200026,2-s2.0-84937510114,United States,anl.gov,Argonne Natl Lab;No Illinois Univ,"Argonne Natl Lab, United States;No Illinois Univ, United States","Barkholtz, Heather M.; Chong, Lina; Kaiser, Zachary B.; Xu, Tao; Liu, Di-Jia"
"Elvington, M.C., Ganesan, P., Ward, P.A., Liu, J., Atilgan, A., Kramar, B.V., More, K., Cullen, D.A., Hupp, J.T., Greenway, S., Taylor Adams, W., Colon-Mercado, H.R.",Highly Active Oxygen Reduction Electrocatalysts Derived from an Iron-Porphyrin Framework,2023,PRX Energy,2,4,043008,,,,1,10.1103/PRXEnergy.2.043008,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105010076966&doi=10.1103%2FPRXEnergy.2.043008&partnerID=40&md5=dc74988c9ec0b6ee97f5baa952127048,"Greenway Energy, Aiken, SC, United States; Savannah River National Laboratory, Aiken, SC, United States; Department of Chemistry, Northwestern University, Evanston, IL, United States; Oak Ridge National Laboratory, Oak Ridge, TN, United States","Elvington, Mark C., Greenway Energy, Aiken, SC, United States; Ganesan, Prabhu, Greenway Energy, Aiken, SC, United States, Savannah River National Laboratory, Aiken, SC, United States; Ward, Patrick A., Savannah River National Laboratory, Aiken, SC, United States; Liu, Jian, Department of Chemistry, Northwestern University, Evanston, IL, United States; Atilgan, Ahmet, Department of Chemistry, Northwestern University, Evanston, IL, United States; Kramar, Boris V., Department of Chemistry, Northwestern University, Evanston, IL, United States; More, Karren L., Oak Ridge National Laboratory, Oak Ridge, TN, United States; Cullen, David A., Oak Ridge National Laboratory, Oak Ridge, TN, United States; Hupp, Joseph T. T., Department of Chemistry, Northwestern University, Evanston, IL, United States; Greenway, Scott D., Greenway Energy, Aiken, SC, United States; Taylor Adams, W., Savannah River National Laboratory, Aiken, SC, United States; Colón-Mercado, Héctor R., Savannah River National Laboratory, Aiken, SC, United States","The high cost of noble metals is a barrier to widespread commercialization of polymer electrolyte membrane fuel cells. Platinum-group-metal-free catalysts are a promising low-cost alternative for catalyzing the oxygen reduction reaction (ORR). Herein, we report a high activity Fe-N-C cathode catalyst derived from a Fe-porphyrinic framework prepared using low-cost precursors and facile one pot synthesis followed by a single heat treatment. The final product has atomically dispersed iron in proximity to nitrogen groups that share transition metal characteristics, as described by electron energy loss spectrometry and x-ray absorption near edge structure results. Electrochemical studies on a rotating ring-disk electrode indicate a four-electron transfer mechanism for the ORR. Membrane electrode assembly testing of the Fe-porphyrin-derived cathode catalyst shows a high kinetic current density of 22 mA cm-2 at 0.9 V in H2-O2 fuel cells. © 2023 authors. Published by the American Physical Society.",,,,,,,,,,American Physical Society,,,,,English,PRX Energy,Article,Scopus,,2-s2.0-105010076966,,United States,No email,,,"Elvington, M.C.; Ganesan, P.; Ward, P.A.; Liu, J.; Atilgan, A.; Kramar, B.V.; More, K.; Cullen, D.A.; Hupp, J.T.; Greenway, S.; Taylor Adams, W.; Colon-Mercado, H.R."
"Deng, J., Yu, L., Deng, D.H., Chen, X.Q., Yang, F., Bao, X.H.",Highly active reduction of oxygen on a FeCo alloy catalyst encapsulated in pod-like carbon nanotubes with fewer walls,2013,JOURNAL OF MATERIALS CHEMISTRY A,1,47,,14868,14873,6,233,10.1039/c3ta13759g,,"[Deng, Jiao; Yu, Liang; Deng, Dehui; Chen, Xiaoqi; Yang, Fan; Bao, Xinhe] Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian 116023, Peoples R China",,"Employing an alternative of the Pt-based electrocatalysts for oxygen reduction reaction (ORR) has become a major interest in the fundamental research of the polymer electrolyte membrane fuel cells (PEMFCs). The carbon-encapsulated metal catalyst, on which O-2 is readily activated by the electrons transferred from the metal to the carbon surface, has recently been demonstrated as a promising strategy to produce robust non-precious metal electrocatalysts. However, the thickness of carbon walls might affect the process of the electron transfer, and subsequently the ORR activity. It is thus vital to explore the influence of the carbon wall thickness on the ORR reactivity for further improvement in designing carbon-encapsulated non-precious metal catalysts for ORR. Herein, we report a novel FeCo alloy catalyst encapsulated in pod-like carbon nanotubes via introducing graphene nanosheets into the raw materials to tailor the carbon wall thickness. The ORR activity of these catalysts increases drastically with the decreased thickness of the carbon walls, which could be attributed to the enhanced adsorption of O-2 on the carbon surface upon decreasing the carbon wall thickness. These findings provide a route for the rational design of high-performance non-precious metal cathode catalysts in PEMFCs.",,HIGH ELECTROCATALYTIC ACTIVITY; PEM FUEL-CELLS; CATHODE CATALYST; GRAPHENE NANOSHEETS; ALKALINE-MEDIUM; NANOPARTICLES; PERFORMANCE; COMPLEXES; SULFUR; GROWTH,HIGH ELECTROCATALYTIC ACTIVITY;PEM FUEL-CELLS;CATHODE CATALYST;GRAPHENE NANOSHEETS;ALKALINE-MEDIUM;NANOPARTICLES;PERFORMANCE;COMPLEXES;SULFUR;GROWTH,dhdeng@dicp.ac.cn; xhbao@dicp.ac.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000326984500007,2-s2.0-84887771694,China,dicp.ac.cn,Chinese Acad Sci,"Chinese Acad Sci, China","Deng, Jiao; Yu, Liang; Deng, Dehui; Chen, Xiaoqi; Yang, Fan; Bao, Xinhe"
"Li, Z., Li, B., Hu, Y., Wang, S., Yu, C.",Highly-dispersed and high-metal-density electrocatalysts on carbon supports for the oxygen reduction reaction: From nanoparticles to atomic-level architectures,2022,Materials Advances,3,2,,779,809,,77,10.1039/d1ma00858g,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85123988114&doi=10.1039%2Fd1ma00858g&partnerID=40&md5=0421a70e9eafa3313279e9b07284036b,"College of Chemistry, Guangdong University of Petrochemical Technology, Maoming, Guangdong, China","Li, Zesheng, College of Chemistry, Guangdong University of Petrochemical Technology, Maoming, Guangdong, China; Li, Bolin, College of Chemistry, Guangdong University of Petrochemical Technology, Maoming, Guangdong, China; Hu, Yifan, College of Chemistry, Guangdong University of Petrochemical Technology, Maoming, Guangdong, China; Wang, Shaoyu, College of Chemistry, Guangdong University of Petrochemical Technology, Maoming, Guangdong, China; Yu, Changling Lin, College of Chemistry, Guangdong University of Petrochemical Technology, Maoming, Guangdong, China","Electrocatalysts for the oxygen reduction reaction (ORR) are crucial for a variety of renewable energy applications (e.g., proton exchange membrane fuel cells, PEMFCs). The synthesis of highly-dispersed and high-metal-density ORR electrocatalysts (e.g., nanoscale and atomic-level structures) on carbon supports with strong durability is extremely desirable but remains challenging. Carbon-supported high-loading noble metal catalysts with nanoscale structures (e.g., Pt-based nanoparticles) are the most widely used catalysts with the best catalytic performances. Single atom catalysts (SACs) that integrate the merits of homogeneous and heterogeneous catalysts have attracted considerable attention in recent years. Aside from the manipulation of the geometric and electronic structures of active metal sites, another key challenge in this field is the development of strategies for preparing high-metal-density SACs, thus rendering atomic-level ORR electrocatalysts dramatically reactive, selective, and stable compared to their nanoscale counterparts. This review summarizes the recent advancements in carbon-supported nanoscale and atomic-level ORR electrocatalysts with high metal density (namely high loading) for fuel cells. Special emphasis is placed on the basic principles, preparation strategies and catalytic applications of these highly-dispersed and high-metal-density ORR electrocatalysts on carbon supports from nanoparticles to atomic-level architectures. © The Royal Society of Chemistry.",,Bioremediation; Carbon; Carbon capture and utilization; Carbon sequestration; Metal nanoparticles; Oxygen; Oxygen reduction reaction; Zero-carbon; Atomic levels; Carbon support; High loadings; Metal density; Nanoscale levels; Proton-exchange membranes fuel cells; Renewable energy applications; Single-atoms; ]+ catalyst; Electrolytic reduction,Bioremediation;Carbon;Carbon capture and utilization;Carbon sequestration;Metal nanoparticles;Oxygen;Oxygen reduction reaction;Zero-carbon;Atomic levels;Carbon support;High loadings;Metal density;Nanoscale levels;Proton-exchange membranes fuel cells;Renewable energy applications;Single-atoms;]+ catalyst;Electrolytic reduction,"Z. Li; College of Chemistry, Guangdong University of Petrochemical Technology, Maoming, 525000, China; email: lzs212@163.com; C. Yu; College of Chemistry, Guangdong University of Petrochemical Technology, Maoming, 525000, China; email: yuchanglinjx@163.com",,,,,,Royal Society of Chemistry,,,,,English,Mater. Adv.,Review,Scopus,,2-s2.0-85123988114,,China,163.com,,,"Li, Z.; Li, B.; Hu, Y.; Wang, S.; Yu, C."
"Zhao, T., Li, Y., Liu, J., Wang, X., Zhang, J., Liu, C., Xing, W., Ge, J.",Highly dispersed L12-Pt3Fe intermetallic particles supported on single atom Fe-Nx-Cy active sites for enhanced activity and durability towards oxygen reduction,2023,Chinese Chemical Letters,34,5,107824,,,,19,10.1016/j.cclet.2022.107824,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85150375920&doi=10.1016%2Fj.cclet.2022.107824&partnerID=40&md5=44891dbb1884084867970ecf3fb8efc1,"State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Fuyuan British American School, Shenzhen, China","Zhao, Tuo, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Li, Yang, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Liu, Jie, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Wang, Xian, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Zhang, Jiayi, Fuyuan British American School, Shenzhen, China; Liu, Changpeng, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Xing, Wei, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Ge, Junjie, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China","Highly active and durable oxygen reduction reaction (ORR) catalysts with sufficient activity and stability of Pt are beneficial for the commercialization of proton exchange membrane fuel cells. Here we report an effective approach to prepare a composite catalyst comprising of ordered L1<inf>2</inf>-Pt<inf>3</inf>Fe intermetallic nanoparticles interact with single atom Fe-N<inf>x</inf>-C<inf>y</inf> active sites. The addition of Fe and the confinement effect of hierarchical porous structure limit the growth of intermetallic particle size (around 2.5 nm). The ligand effect of the electron transfer from Fe to Pt and the synergistic interaction between L1<inf>2</inf>-Pt<inf>3</inf>Fe and Fe-N<inf>x</inf>-C<inf>y</inf> work together to reduce oxygen intermediates adsorption and improve kinetics process. Experimentally, the L1<inf>2</inf>-Pt<inf>3</inf>Fe/C<inf>Fe-N-C</inf> catalyst shows high mass activity and specific activity at 1.010 A/mg<inf>Pt</inf> and 1.166 mA/cm2, respectively, which are 5.8 and 5.1 times higher than those of commercial Pt/C (0.174 A/mg<inf>Pt</inf> and 0.230 mA/cm2). Thanks to the more stable L1<inf>2</inf> structure, L1<inf>2</inf>-Pt<inf>3</inf>Fe/C<inf>Fe-N-C</inf> exhibits better durability (14 mV E<inf>1/2</inf> loss of L1<inf>2</inf>-Pt<inf>3</inf>Fe/C<inf>Fe-N-C</inf> and 33 mV E<inf>1/2</inf> loss of commercial Pt/C) after 30,000 cycles accelerated stress tests. The strategy to design and prepare small particle Pt-based intermetallic alloys coordinated with M-N-C active sites provides a new direction to obtain low-cost and easily prepared effective ORR catalysts. © 2023",Confinement effect; Intermetallic alloys; ORR; Single atom active sites; Synergistic effect,,Confinement effect;Intermetallic alloys;ORR;Single atom active sites;Synergistic effect,"J. Ge; State Key Laboratory of Electroanalytical Chemistry, Jilin Province Key Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: gejj@ciac.ac.cn",,,,,,Elsevier B.V.,10018417,,CCLEE,,English,Chin. Chem. Lett.,Article,Scopus,,2-s2.0-85150375920,,China,ciac.ac.cn,,,"Zhao, T.; Li, Y.; Liu, J.; Wang, X.; Zhang, J.; Liu, C.; Xing, W.; Ge, J."
"Zhan, Y., Xie, F., Zhang, H., Jin, Y., Meng, H., Chen, J., Sun, X.",Highly Dispersed Nonprecious Metal Catalyst for Oxygen Reduction Reaction in Proton Exchange Membrane Fuel Cells,2020,ACS Applied Materials and Interfaces,12,15,,17481,17491,,39,10.1021/acsami.0c00126,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85083544969&doi=10.1021%2Facsami.0c00126&partnerID=40&md5=78c114d6457cae617b191f0bca886c2f,"Department of Physics, Jinan University, Guangzhou, Guangdong, China; Instrumental Analysis and Research Center, Sun Yat-Sen University, Guangzhou, Guangdong, China; Department of Mechanical and Materials Engineering, Western University, London, ON, Canada","Zhan, Yunfeng, Department of Physics, Jinan University, Guangzhou, Guangdong, China; Xie, Fangyan, Instrumental Analysis and Research Center, Sun Yat-Sen University, Guangzhou, Guangdong, China; Zhang, Hao, Instrumental Analysis and Research Center, Sun Yat-Sen University, Guangzhou, Guangdong, China; Jin, Yanshuo, Department of Physics, Jinan University, Guangzhou, Guangdong, China; Meng, Hui, Department of Physics, Jinan University, Guangzhou, Guangdong, China; Chen, Jian, Instrumental Analysis and Research Center, Sun Yat-Sen University, Guangzhou, Guangdong, China; Sun, Andy Xueliang, Department of Mechanical and Materials Engineering, Western University, London, ON, Canada","This study reports a high-performing nonprecious metal catalyst for the oxygen reduction reaction that is composed of highly dispersed Fe centered active sites on bamboolike carbon nanotubes. NH<inf>2</inf>-MIL-88B is used as the iron source and ZIF-8 as the carbon source. The precursors are uniformly mixed by ball milling, which destroys their crystal structures. A bamboolike carbon nanotube network results from the pyrolysis of the mixed precursors. The morphology is controlled by the proportion of the precursors and the pyrolysis temperature. The catalyst shows excellent oxygen reduction activity in both half-cell and full-cell tests. The onset potential and half-wave potential are 0.96 and 0.78 V vs RHE, respectively. In the fuel cell test, the current density reaches 0.85 A cm-2 at 0.7 V and 1.24 A cm-2 at 0.6 V (iR-corrected). The novel synthesis approach of the highly dispersed catalyst provides new strategy in the design of high effective nonprecious metal catalysts for fuel cell. © © 2020 American Chemical Society.",carbon nanotubes; fuel cell; highly dispersed catalyst; membrane electrode assembly; nonprecious metal catalyst; oxygen reduction,Ball milling; Carbon nanotubes; Catalyst activity; Electrolytic reduction; Oxygen; Oxygen reduction reaction; Pyrolysis; Bamboo-like carbon nanotubes; Fuel cell tests; Half-wave potential; Mixed precursors; Non-precious metal catalysts; Onset potential; Oxygen Reduction; Pyrolysis temperature; Proton exchange membrane fuel cells (PEMFC),carbon nanotubes;fuel cell;highly dispersed catalyst;membrane electrode assembly;nonprecious metal catalyst;oxygen reduction;Ball milling;Catalyst activity;Electrolytic reduction;Oxygen;Oxygen reduction reaction;Pyrolysis;Bamboo-like carbon nanotubes;Fuel cell tests;Half-wave potential;Mixed precursors;Non-precious metal catalysts;Onset potential;Pyrolysis temperature;Proton exchange membrane fuel cells (PEMFC),"H. Meng; Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Guangdong Prov. Eng. Technol. Res. Center of Vacuum Coating Technologies and New Energy Materials, Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Physics, Jinan University, Guangzhou, Guangdong, 510632, China; email: tmh@jnu.edu.cn",,,,,,American Chemical Society service@acs.org,19448244,,,32216330,English,ACS Appl. Mater. Interfaces,Article,Scopus,,2-s2.0-85083544969,,China;Canada,jnu.edu.cn,,,"Zhan, Y.; Xie, F.; Zhang, H.; Jin, Y.; Meng, H.; Chen, J.; Sun, X."
"Zagoraiou, E., Daletou, M.K., Sygellou, L., Ballomenou, S., Neophytides, S.G.",Highly dispersed platinum supported catalysts - Effect of properties on the electrocatalytic activity,2019,APPLIED CATALYSIS B-ENVIRONMENTAL,259,,118050,,,14,35,10.1016/j.apcatb.2019.118050,,"[Zagoraiou, Eirini; Daletou, Maria K.; Sygellou, Labrini; Neophytides, Stylianos G.] Fdn Res & Technol Hellas, Inst Chem Engn Sci, FORTH ICEHT, Stadiou Str,POB 1414, GR-26504 Patras, Greece; [Ballomenou, Stella] CPERI CERTH, Chem Proc & Energy Resources Inst, Ctr Res & Technol Hellas, 6th Km Charilaou Thermi Rd, Thessaloniki 57001, Greece",,"This work addresses scientific issues regarding the most challenging component of PEM fuel cells, the electrocatalyst, and explores a new approach to exploit the differentiations induced to the metal by the surface chemistry of the support. The study focuses on the development of Pt based electrocatalysts supported on pyridine modified carbon nanotubes with different Pt loadings, their thorough characterization and parallel comparison with non-modified or conventional carbon supports. The aim is the interpretation of the catalyst electrochemical behavior through a structural and physicochemical characterization study. The introduction of pyridines can differentiate the metal deposition, in terms of dispersion, nanoparticle properties, platinum oxidation state and metal-support interactions. Moreover, the substrate can play a decisive role on the size and functionality of the electrochemical interface. This approach constitutes a promising route for developing materials with innovative features aiming to a serious reduction in the Pt loads through increased activity and metal utilization.",Platinum deposition; Punctionalized nanotubes; High/atomic dispersion; Oxygen reduction reaction; Electrochemical activity,OXYGEN REDUCTION REACTION; SINGLE-ATOM CATALYST; CARBON NANOTUBES; PARTICLE-SIZE; FUEL-CELLS; X-RAY; OXIDATION; METAL; ELECTROREDUCTION; NANOPARTICLES,Platinum deposition;Punctionalized nanotubes;High/atomic dispersion;Oxygen reduction reaction;Electrochemical activity;SINGLE-ATOM CATALYST;CARBON NANOTUBES;PARTICLE-SIZE;FUEL-CELLS;X-RAY;OXIDATION;METAL;ELECTROREDUCTION;NANOPARTICLES,riadal@iceht.forth.gr,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0926-3373,,,,English,APPL CATAL B-ENVIRON,Article,WoS,Chemistry; Engineering,WOS:000488308800076,,Greece,iceht.forth.gr,Fdn Res & Technol Hellas;CPERI CERTH,"Fdn Res & Technol Hellas, Greece;CPERI CERTH, Greece","Zagoraiou, Eirini; Daletou, Maria K.; Sygellou, Labrini; Ballomenou, Stella; Neophytides, Stylianos G."
"Bhuvanendran, N., Ravichandran, S., Peng, K., Jayaseelan, S.S., Xu, Q., Su, H.N.",Highly durable carbon supportedFe-Nnanocrystals feature as efficient bi-functional oxygen electrocatalyst,2020,INTERNATIONAL JOURNAL OF ENERGY RESEARCH,44,11,,8413,8426,14,17,10.1002/er.5524,,"[Bhuvanendran, Narayanamoorthy; Ravichandran, Sabarinathan; Peng, Kai; Jayaseelan, Santhana Sivabalan; Xu, Qian; Su, Huaneng] Jiangsu Univ, Inst Energy Res, 301 Xuefu Rd, Zhenjiang 212013, Jiangsu, Peoples R China; [Ravichandran, Sabarinathan] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang, Jiangsu, Peoples R China",,"The mesoporous carbon layers protectedFe-Nnanocrystals (Fe-N-C-syn) was successfully synthesized by a simple hydrothermal approach and displays an improved oxygen bi-functional performance. The high specific surface area, mesoporous and graphitic carbon with more active sites ofFe-N(x)and Fe3C/Fe inFe-N-C(syn)favors good synergistic electrocatalytic effect toward oxygen reduction and oxygen evolution reactions (ORR and OER) in alkaline medium. The bi-functional activity ofFe-N-C(syn)was clearly observed from the earlier onset potential of 0.86 V and limiting current density of 5.23 mA cm(-2)for ORR, as well as the low over potential of 470 mV with small Tafel slope value of 84 mV dec(-1)for OER. The enhanced stability and improved oxygen bifunctional activity ofFe-N-C(syn)catalyst was evidently demonstrated through an innovative synthesis approach for the development of earth-abundant metal catalysts for energy applications.",carbon encapsulation; durability; Fe-N-C; HMTA; OER; ORR,FE-N-C; PEM FUEL-CELLS; REDUCTION REACTION; DOPED GRAPHENE; BIFUNCTIONAL ELECTROCATALYST; MESOPOROUS CARBON; METAL ELECTROCATALYST; EVOLUTION REACTIONS; CATHODE CATALYST; AIR BATTERIES,carbon encapsulation;durability;Fe-N-C;HMTA;OER;ORR;PEM FUEL-CELLS;REDUCTION REACTION;DOPED GRAPHENE;BIFUNCTIONAL ELECTROCATALYST;MESOPOROUS CARBON;METAL ELECTROCATALYST;EVOLUTION REACTIONS;CATHODE CATALYST;AIR BATTERIES,suhuaneng@ujs.edu.cn,,"111 RIVER ST, HOBOKEN 07030-5774, NJ USA",,,,WILEY,0363-907X,,,,English,INT J ENERG RES,Article,WoS,Energy & Fuels; Nuclear Science & Technology,WOS:000540306000001,,China,ujs.edu.cn,Jiangsu Univ,"Jiangsu Univ, China","Bhuvanendran, Narayanamoorthy; Ravichandran, Sabarinathan; Peng, Kai; Jayaseelan, Santhana Sivabalan; Xu, Qian; Su, Huaneng"
"Ren, H., Wang, Y., Tang, X., Lu, J., Xiao, L., Zhuang, L.",Highly efficient Fe/N/C catalyst using adenosine as C/N-source for APEFC,2017,Journal of Energy Chemistry,26,4,,616,621,,10,10.1016/j.jechem.2017.05.001,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85021982137&doi=10.1016%2Fj.jechem.2017.05.001&partnerID=40&md5=5e2ecabac8bb22580e4052e1e862cc13,"Hubei Key Lab of Electrochemical Power Sources, Wuhan University, Wuhan, Hubei, China","Ren, Huan, Hubei Key Lab of Electrochemical Power Sources, Wuhan University, Wuhan, Hubei, China; Wang, Ying, Hubei Key Lab of Electrochemical Power Sources, Wuhan University, Wuhan, Hubei, China; Tang, Xun, Hubei Key Lab of Electrochemical Power Sources, Wuhan University, Wuhan, Hubei, China; Lu, Juntao, Hubei Key Lab of Electrochemical Power Sources, Wuhan University, Wuhan, Hubei, China; Xiao, Li, Hubei Key Lab of Electrochemical Power Sources, Wuhan University, Wuhan, Hubei, China; Zhuang, Lin, Hubei Key Lab of Electrochemical Power Sources, Wuhan University, Wuhan, Hubei, China","An environmentally friendly precursor, adenosine, has been used as a dual source of C and N to synthesize nitrogen-doped carbon catalyst with/without Fe. A hydrothermal carbonization method has been used and water is the carbonization media. The morphology of samples with/without Fe component has been compared by HRTEM, and the result shows that Fe can promote the graphitization of carbon. Further electro-chemical test shows that the oxygen reduction reaction (ORR) catalytic activity of Fe-containing sample (C–FeN) is much higher than that of the Fe-free sample (C–N). Additionally, the intermediates of C–FeN formed during each synthetic procedure have been thoroughly characterized by multiple methods, and the function of each procedure has been discussed. The C–FeN sample exhibits high electro-catalytic stability and superior electro-catalytic activity toward ORR in alkaline media, with its half-wave potential 20 mV lower than that of commercial Pt/C (40 wt%). It is further incorporated into alkaline polymer electrolyte fuel cell (APEFC) as the cathode material and led to a power density of 100 mW/cm2. © 2017 Science Press",Alkaline polymer electrolyte; Fe/N/C; Fuel cell; N-doped carbon catalyst; ORR,Alkaline fuel cells; Alkalinity; Carbonization; Catalysts; Cathodes; Doping (additives); Electrolytes; Electrolytic reduction; Fuel cells; Landforms; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Wetlands; Alkaline polymer electrolyte fuel cells; Electrocatalytic activity; Hydrothermal carbonization; N-doped; Nitrogen-doped carbons; Oxygen reduction reaction; Polymer electrolyte; Synthetic procedures; Catalyst activity,Alkaline polymer electrolyte;Fe/N/C;Fuel cell;N-doped carbon catalyst;ORR;Alkaline fuel cells;Alkalinity;Carbonization;Catalysts;Cathodes;Doping (additives);Electrolytes;Electrolytic reduction;Fuel cells;Landforms;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Solid electrolytes;Wetlands;Alkaline polymer electrolyte fuel cells;Electrocatalytic activity;Hydrothermal carbonization;N-doped;Nitrogen-doped carbons;Oxygen reduction reaction;Polymer electrolyte;Synthetic procedures;Catalyst activity,"L. Xiao; College of Chemistry and Molecular Sciences, Hubei Key Lab of Electrochemical Power Sources, Wuhan University, Wuhan, 430072, China; email: chem.lily@whu.edu.cn",,,,,,Elsevier B.V.,20954956,,,,English,J. Energy Chem.,Article,Scopus,,2-s2.0-85021982137,,China,whu.edu.cn,,,"Ren, H.; Wang, Y.; Tang, X.; Lu, J.; Xiao, L.; Zhuang, L."
"Huang, J.W., Cheng, Q.Q., Huang, Y.C., Yao, H.C., Zhu, H.B., Yang, H.",Highly Efficient Fe-N-C Electrocatalyst for Oxygen Reduction Derived from Core-Shell-Structured Fe(OH)3@Zeolitic Imidazolate Framework,2019,ACS APPLIED ENERGY MATERIALS,2,5,,3194,3203,19,38,10.1021/acsaem.9b00023,,"[Huang, Jia-Wei; Huang, Yi-Chen; Zhu, Hai-Bin] Southeast Univ, Sch Chem & Chem Engn, Nanjing 211189, Jiangsu, Peoples R China; [Cheng, Qing-Qing; Yang, Hui] Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China; [Yao, Hong-Chang] Zhengzhou Univ, Coll Chem & Mol Engn, Zhengzhou 450002, Henan, Peoples R China",,"Fe-N-C electrocatalysts represent one of the most promising oxygen reduction catalysts to replace the expensive platinum (Pt)-based catalysts in fuel cells. Herein, we report a highly efficient zeolitic imidazolate framework (ZIF)-derived Fe-N-C electrocatalyst for the oxygen reduction reaction (ORR) in both alkaline and acidic solutions, which involves the formation of a core-shell-structured Fe(OH)(3)@ZIF-8. The encapsulated Fe(OH)(3) in ZIF-8 gradually evolves into iron oxide with the increasing temperature during the carbonization, which plays several roles including creating Fe-N-x active sites, retaining morphology as a rigid template as well as tuning the carbon microstructure. The best-performing C-Fe(OH)(3)@ZIF-1000 catalyst features a hollow polyhedron (interior cavity: ca. 48 nm) with a thin carbon shell (ca. 5 nm), exhibiting a high Brunauer-Emmet-Teller (BET) surface area of 1021 m(2) g(-1). In alkaline solution, the ORR activity of C-Fe(OH)(3)@ZIF-1000 surpasses the benchmark Pt/C catalyst, with the onset potential (E-onset) of 0.99 V (vs RHE) and the half-wave potential (E-1/2) of 0.88 V (vs RHE). In acidic solution, the difference in E-1/2 between C-Fe(OH)(3)@ZIF-1000 and Pt/C is 60 mV (0.80 vs 0.86 V), ranking it among the best Fe-N-C electrocatalysts in acidic media. The H2O2 proton exchange membrane fuel cell (PEMFC) with C-Fe(OH)(3)@ ZIF-1000 as the cathode catalyst delivers a maximum power density of 411 mW cm(2) at 0.35 V.",Fe-N-C electrocatalysts; iron oxide; zeolitic imidazolate framework; oxygen reduction reaction; H-2-O-2 proton exchange membrane fuel cell,DOPED POROUS CARBON; CATALYTIC SITES; METAL-CATALYSTS; PARTICLE-SIZE; FUEL-CELLS; IRON; ACTIVATION; NANOFRAMES; EVOLUTION; ZIF-8,Fe-N-C electrocatalysts;iron oxide;zeolitic imidazolate framework;oxygen reduction reaction;H-2-O-2 proton exchange membrane fuel cell;DOPED POROUS CARBON;CATALYTIC SITES;METAL-CATALYSTS;PARTICLE-SIZE;FUEL-CELLS;IRON;ACTIVATION;NANOFRAMES;EVOLUTION;ZIF-8,zhuhaibin@seu.edu.cn; yangh@sari.ac.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2574-0962,,,,English,ACS APPL ENERG MATER,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000469885300027,2-s2.0-85066306777,China,seu.edu.cn,Southeast Univ;Chinese Acad Sci;Zhengzhou Univ,"Southeast Univ, China;Chinese Acad Sci, China;Zhengzhou Univ, China","Huang, Jia-Wei; Cheng, Qing-Qing; Huang, Yi-Chen; Yao, Hong-Chang; Zhu, Hai-Bin; Yang, Hui"
"Wang, Y., Zou, K., Wang, D., Meng, W., Qi, N., Cao, Z., Zhang, K., Chen, H., Li, G.",Highly efficient hydrogen evolution from the hydrolysis of ammonia borane solution with the Co–Mo–B/NF nanocatalyst,2020,Renewable Energy,154,,,453,460,,42,10.1016/j.renene.2020.03.032,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85081699760&doi=10.1016%2Fj.renene.2020.03.032&partnerID=40&md5=97256297c562fbcda11bfcc944fc9c22,"Institute of Catalysis for Energy and Environment, Shenyang Normal University, Shenyang, China; Nankai University, Tianjin, China; Office of Academic Research, Shenyang Normal University, Shenyang, China; Hunan Chinaly New Material Co., Ltd, China","Wang, Yan, Institute of Catalysis for Energy and Environment, Shenyang Normal University, Shenyang, China, Nankai University, Tianjin, China; Zou, Kailu, Institute of Catalysis for Energy and Environment, Shenyang Normal University, Shenyang, China; Wang, Dan, Institute of Catalysis for Energy and Environment, Shenyang Normal University, Shenyang, China; Meng, Wei, Institute of Catalysis for Energy and Environment, Shenyang Normal University, Shenyang, China; Qi, Nan, Office of Academic Research, Shenyang Normal University, Shenyang, China; Cao, Zhongqiu, Institute of Catalysis for Energy and Environment, Shenyang Normal University, Shenyang, China; Zhang, Ke, Institute of Catalysis for Energy and Environment, Shenyang Normal University, Shenyang, China; Chen, Honghui, Hunan Chinaly New Material Co., Ltd, China; Li, Guode, Office of Academic Research, Shenyang Normal University, Shenyang, China","Catalytic hydrolysis of ammonia borane (NH<inf>3</inf>BH<inf>3</inf>) is considered as a secure and effective way to supply hydrogen (H<inf>2</inf>) source for the proton exchange membrane fuel cell. Hence, cheap and high activity catalysts need to be exploited. In this work, a series of cobalt–molybdenum–boron (Co–Mo–B) composites were successfully supported on the surface of Ni foam (NF in short) via electroless plating method by tuning the depositional pH values. The as-prepared nanocatalysts were marked as Co–Mo–B/NF and characterized using the inductively coupled plasma-mass spectroscopy, scanning electron microscopy, X–ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy technology. These catalysts showed highly efficient catalytic performance for H<inf>2</inf> evolution toward the hydrolysis of NH<inf>3</inf>BH<inf>3</inf> solution, and the optimized Co–Mo–B/NF nanocatalyst deposited at pH = 11.5 achieved a higher H<inf>2</inf> evolution rate of 6027.1 mL·min−1·g−1 under ambient temperature. The kinetics tests displayed that hydrolysis reaction catalyzed by Co–Mo–B/NF was zero-order in terms of the NH<inf>3</inf>BH<inf>3</inf> concentration, while it was first-order in view of the catalyst concentration. In addition, the activation energy of NH<inf>3</inf>BH<inf>3</inf> hydrolysis was calculated to be 43.6 kJ·mol−1 with the Co–Mo–B/NF nanocatalyst (pH = 11.5), which was lower than that of most of the previous precious metal and non-precious metal catalysts. The corresponding Gibbs free energy of activation was 43.1 kJ·mol−1, meaning that NH<inf>3</inf>BH<inf>3</inf> hydrolysis reaction was non-spontaneous. © 2020 Elsevier Ltd",Ammonia borane; Co–Mo–B/Ni foam nanocatalyst; Hydrolysis; Kinetics; Thermodynamics,Activation energy; Ammonia; Catalyst activity; Electroless plating; Enzyme kinetics; Foams; Free energy; Gibbs free energy; High resolution transmission electron microscopy; Hydrogen; Inductively coupled plasma; Mass spectrometry; Molybdenum plating; Nanocatalysts; Precious metals; Proton exchange membrane fuel cells (PEMFC); Reaction kinetics; Scanning electron microscopy; Thermodynamics; X ray photoelectron spectroscopy; Ammonia borane; Catalyst concentration; Catalytic performance; Electroless plating methods; Free energy of activations; Inductively coupled plasma mass spectroscopies; Nano-catalyst; Non-precious metal catalysts; Hydrolysis; activation energy; ammonia; catalyst; hydrogen; hydrolysis; precious metal; reaction kinetics; transmission electron microscopy; X-ray spectroscopy,Ammonia borane;Co–Mo–B/Ni foam nanocatalyst;Hydrolysis;Kinetics;Thermodynamics;Activation energy;Ammonia;Catalyst activity;Electroless plating;Enzyme kinetics;Foams;Free energy;Gibbs free energy;High resolution transmission electron microscopy;Hydrogen;Inductively coupled plasma;Mass spectrometry;Molybdenum plating;Nanocatalysts;Precious metals;Proton exchange membrane fuel cells (PEMFC);Reaction kinetics;Scanning electron microscopy;X ray photoelectron spectroscopy;Catalyst concentration;Catalytic performance;Electroless plating methods;Free energy of activations;Inductively coupled plasma mass spectroscopies;Nano-catalyst;Non-precious metal catalysts;catalyst;precious metal;transmission electron microscopy;X-ray spectroscopy,"Y. Wang; Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, 110034, China; email: wangyan11287@mail.nankai.edu.cn",,,,,,Elsevier Ltd,09601481,9780123750259,,,English,Renew. Energy,Article,Scopus,,2-s2.0-85081699760,,China,mail.nankai.edu.cn,,,"Wang, Y.; Zou, K.; Wang, D.; Meng, W.; Qi, N.; Cao, Z.; Zhang, K.; Chen, H.; Li, G."
"Shui, J.L., Chen, C., Grabstanowicz, L., Zhao, D., Liu, D.J.",Highly efficient nonprecious metal catalyst prepared with metal-organic framework in a continuous carbon nanofibrous network,2015,PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,112,34,,10629,10634,6,388,10.1073/pnas.1507159112,,"[Shui, Jianglan; Chen, Chen; Grabstanowicz, Lauren; Liu, Di-Jia] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA; [Shui, Jianglan] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China; [Grabstanowicz, Lauren] Alcoa Tech Ctr, New Kensington, PA 15068 USA; [Zhao, Dan] Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117576, Singapore",,"Fuel cell vehicles, the only all-electric technology with a demonstrated >300 miles per fill travel range, use Pt as the electrode catalyst. The high price of Pt creates a major cost barrier for large-scale implementation of polymer electrolyte membrane fuel cells. Nonprecious metal catalysts (NPMCs) represent attractive low-cost alternatives. However, a significantly lower turnover frequency at the individual catalytic site renders the traditional carbon-supported NPMCs inadequate in reaching the desired performance afforded by Pt. Unconventional catalyst design aiming at maximizing the active site density at much improved mass and charge transports is essential for the next-generation NPMC. We report here a method of preparing highly efficient, nanofibrous NPMC for cathodic oxygen reduction reaction by electro-spinning a polymer solution containing ferrous organometallics and zeolitic imidazolate framework followed by thermal activation. The catalyst offers a carbon nanonetwork architecture made of microporous nanofibers decorated by uniformly distributed high-density active sites. In a single-cell test, the membrane electrode containing such a catalyst delivered unprecedented volumetric activities of 3.3 A.cm(-3) at 0.9 V or 450 A.cm(-3) extrapolated at 0.8 V, representing the highest reported value in the literature. Improved fuel cell durability was also observed.",nanofibrous; nonprecious metal catalyst; metal-organic framework; fuel cell; oxygen reduction,OXYGEN REDUCTION REACTION; PEM FUEL-CELLS; ZEOLITIC IMIDAZOLATE FRAMEWORKS; HIGH ELECTROCATALYTIC ACTIVITY; CATHODE CATALYST; FE/N/C CATALYSTS; HEAT-TREATMENT; IRON; PRECURSOR; BLACKS,nanofibrous;nonprecious metal catalyst;metal-organic framework;fuel cell;oxygen reduction;OXYGEN REDUCTION REACTION;PEM FUEL-CELLS;ZEOLITIC IMIDAZOLATE FRAMEWORKS;HIGH ELECTROCATALYTIC ACTIVITY;CATHODE CATALYST;FE/N/C CATALYSTS;HEAT-TREATMENT;IRON;PRECURSOR;BLACKS,djliu@anl.gov,,"2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA",,,,NATL ACAD SCIENCES,0027-8424,,,26261338,English,P NATL ACAD SCI USA,Article,WoS,Science & Technology - Other Topics,WOS:000360005600041,,United States;China;Singapore,anl.gov,Argonne Natl Lab;Beihang Univ;Alcoa Tech Ctr;Natl Univ Singapore,"Argonne Natl Lab, United States;Beihang Univ, China;Alcoa Tech Ctr, United States;Natl Univ Singapore, Singapore","Shui, Jianglan; Chen, Chen; Grabstanowicz, Lauren; Zhao, Dan; Liu, Di-Jia"
"Zhu, C., Li, H., Fu, S., Du, D., Lin, Y.",Highly efficient nonprecious metal catalysts towards oxygen reduction reaction based on three-dimensional porous carbon nanostructures,2016,Chemical Society Reviews,45,3,,517,531,,865,10.1039/c5cs00670h,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956889718&doi=10.1039%2Fc5cs00670h&partnerID=40&md5=e173f9b617aae11267f2b9cd3c2a65d5,"Voiland College of Engineering and Architecture, Pullman, WA, United States; Key Laboratory of Pesticide and Chemical Biology, Central China Normal University, Wuhan, Hubei, China","Zhu, Chengzhou, Voiland College of Engineering and Architecture, Pullman, WA, United States; Li, He, Voiland College of Engineering and Architecture, Pullman, WA, United States; Fu, Shaofang, Voiland College of Engineering and Architecture, Pullman, WA, United States; Du, Dan, Voiland College of Engineering and Architecture, Pullman, WA, United States, Key Laboratory of Pesticide and Chemical Biology, Central China Normal University, Wuhan, Hubei, China; Lin, Yuehe, Voiland College of Engineering and Architecture, Pullman, WA, United States","Developing a low cost, highly active, durable cathode towards an oxygen reduction reaction (ORR) is one of the high-priority research directions for commercialization of low-temperature polymer electrolyte membrane fuel cells (PEMFCs). However, the electrochemical performance of PEMFCs is still hindered by the high cost and insufficient durability of the traditional Pt-based cathode catalysts. Under these circumstances, the search for efficient alternatives to replace Pt for constructing highly efficient nonprecious metal catalysts (NPMCs) has been growing intensively and has received great interest. Combining with the compositional effects, the accurate design of NPMCs with 3D porous nanostructures plays a significant role in further enhancing ORR performance. These 3D porous architectures are able to provide higher specific surface areas and larger pore volumes, not only maximizing the availability of electron transfer within the nanosized electrocatalyst surface area but also providing better mass transport of reactants to the electrocatalyst. In this Tutorial Review, we focus on the rational design and synthesis of different 3D porous carbon-based nanomaterials, such as heteroatom-doped carbon, metal-nitrogen-carbon nanostructures and a series of carbon/nonprecious metal-based hybrids. More importantly, their enhanced ORR performances are also demonstrated by virtue of their favorably porous morphologies and compositional effects. Finally, the future trends and perspectives for the highly efficient porous NPMCs regarding the material design are discussed, with an emphasis on substantial development of advanced carbon-based NPMCs for ORR in the near future. © 2016 Royal Society of Chemistry.",,,,"Y. Lin; School of Mechanical and Materials Engineering, Washington State University, Pullman, 99164-2920, United States; email: Yuehe.lin@wsu.edu",,,,,,Royal Society of Chemistry,03060012,,CSRVB,,English,Chem. Soc. Rev.,Review,Scopus,,2-s2.0-84956889718,,United States;China,wsu.edu,,,"Zhu, C.; Li, H.; Fu, S.; Du, D.; Lin, Y."
"Yao, Y.F., You, Y., Zhang, G.X., Liu, J.G., Sun, H.R., Zou, Z.G., Sun, S.H.",Highly Functional Bioinspired Fe/N/C Oxygen Reduction Reaction Catalysts: Structure-Regulating Oxygen Sorption,2016,ACS APPLIED MATERIALS & INTERFACES,8,10,,6464,6471,8,44,10.1021/acsami.5b11870,,"[Yao, Yingfang; You, Yong; Liu, Jianguo; Sun, Haoran; Zou, Zhigang] Nanjing Univ, Coll Engn & Appl Sci, Natl Lab Solid State Microstruct, 22 Hankou Rd, Nanjing 210093, Jiangsu, Peoples R China; [Yao, Yingfang; You, Yong; Liu, Jianguo; Sun, Haoran; Zou, Zhigang] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, 22 Hankou Rd, Nanjing 210093, Jiangsu, Peoples R China; [Yao, Yingfang; Zou, Zhigang] Nanjing Univ, Dept Phys, 22 Hankou Rd, Nanjing 210093, Jiangsu, Peoples R China; [Zhang, Gaixia; Sun, Shuhui] Inst Natl Rech Sci Energie Mat & Telecommun, 1650 Blvd Lionel Boulet, Varennes, PQ J3X 1S2, Canada; [Liu, Jianguo] Kunshan Sunlaite New Energy Co Ltd, 1699 South Zuchongzhi Rd, Suzhou 215347, Kunshan, Peoples R China",,"Tuna is one of the most rapid and distant swimmers. Its unique gill structure with the porous lamellae promotes fast oxygen exchange that guarantees tuna's high metabolic and athletic demands. Inspired by this specific structure, we designed and fabricated microporous graphene nanoplatelets (GNPs)-based Fe/N/C electrocatalysts for oxygen reduction reaction (ORR). Careful control of GNP structure leads to the increment of microporosity, which influences the O-2 adsorption positively and desorption oppositely, resulting in enhanced O-2 diffusion, while experiencing reduced ORR kinetics. Working in the cathode of proton-exchange membrane fuel cells, the GNP catalysts require a compromise between adsorption/desorption for effective O-2 exchange, and as a result, appropriate microporosity is needed. In this work, the highest power density, 521 mW.cm(-2), at zero back pressure is achieved.",proton-exchange membrane fuel cells; oxygen reduction reaction; nonprecious metal catalyst; graphene nanoplatelets; microporosity,HIGH ELECTROCATALYTIC ACTIVITY; METAL-FREE ELECTROCATALYSTS; NITROGEN-DOPED GRAPHENE; IRON; ALLOY; SURFACE; MORPHOLOGY; COMPOSITE; CHEMISTRY; TELEOSTS,proton-exchange membrane fuel cells;oxygen reduction reaction;nonprecious metal catalyst;graphene nanoplatelets;microporosity;HIGH ELECTROCATALYTIC ACTIVITY;METAL-FREE ELECTROCATALYSTS;NITROGEN-DOPED GRAPHENE;IRON;ALLOY;SURFACE;MORPHOLOGY;COMPOSITE;CHEMISTRY;TELEOSTS,jianguoliu@nju.edu.cn; zgzou@nju.edu.cn; shuhui@emt.inrs.ca,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1944-8244,,,26902179,English,ACS APPL MATER INTER,Article,WoS,Science & Technology - Other Topics; Materials Science,WOS:000372479300020,2-s2.0-84962373653,China;Canada,nju.edu.cn,Nanjing Univ;Inst Natl Rech Sci Energie Mat & Telecommun;Kunshan Sunlaite New Energy Co Ltd,"Nanjing Univ, China;Inst Natl Rech Sci Energie Mat & Telecommun, Canada;Kunshan Sunlaite New Energy Co Ltd, China","Yao, Yingfang; You, Yong; Zhang, Gaixia; Liu, Jianguo; Sun, Haoran; Zou, Zhigang; Sun, Shuhui"
"Lin, Y.J., Tsai, J.E., Huang, C.C., Chen, Y.S., Li, Y.Y.",Highly Porous Iron-Doped Nitrogen-Carbon Framework on Reduced Graphene Oxide as an Excellent Oxygen Reduction Catalyst for Proton-Exchange Membrane Fuel Cells,2022,ACS APPLIED ENERGY MATERIALS,5,2,,1822,1832,11,22,10.1021/acsaem.1c03245,,"[Lin, Yu-Jui; Tsai, Jui-En; Huang, Cheng-Che; Li, Yuan-Yao] Natl Chung Cheng Univ, Dept Chem Engn, Chiayi 62102, Taiwan; [Chen, Yong-Song] Natl Chung Cheng Univ, Dept Mech Engn, Chiayi 62102, Taiwan; [Chen, Yong-Song; Li, Yuan-Yao] Natl Chung Cheng Univ, Adv Inst Mfg High Tech Innovat, Chiayi 62102, Taiwan",,"Iron-doped nitrogen carbon (Fe-NC) is a suitable catalyst for the oxygen reduction reaction (ORR) in acidic and alkaline environments. However, challenges remain in controlling the porosity of the catalyst and distribution of the active sites. Herein, we have prepared a highly porous Fe-doped nitrogen-carbon framework on reduced graphene (A-Fe-NC/rGO) for ORR and proton-exchange membrane fuel cell (PEMFC) studies. The A-Fe-NC/rGO catalyst was fabricated via carbonization of Fe-doped zeolitic imidazolate framework-8 (ZIF8) on graphene oxide, followed by thermal treatment in the presence of NH3 to create mesopores and modify the nitrogen species present in the catalyst. As a result, highly porous, hierarchical, and conductive A-Fe-NC/rGO with a specific surface area of 1226.2 m(2) g(-1) was synthesized. The catalyst exhibited superior performance using linear sweep voltammetry (LSV) in 0.1 M HClO4 and 0.1 M KOH electrolytes when compared to a commercially available Pt/C catalyst. The excellent performance has been attributed to (1) the hierarchical structure enabling rapid mass transfer, (2) the highly porous carbon framework exposing a large number of active Fe sites on the surface, and (3) reduced graphene oxide enhancing the conductivity of the catalyst. Our PEMFC study has shown that a maximum power density of 310 mW cm(-2) can be achieved at 764 mA cm(-2). We believe that A-Fe-NC/rGO can be used as a high-quality cathode catalyst for PEMFC applications.",metal-organic framework; oxygen reduction reaction; nonprecious-metal nanocatalysts; proton-exchange membrane fuel cell; graphene,HIGH-PERFORMANCE ELECTROCATALYSTS; ORGANIC FRAMEWORK; ACTIVE-SITES; FE-N/C; METAL; EFFICIENT; ZIF-8; NANOPARTICLES; ACTIVATION; ALKALINE,metal-organic framework;oxygen reduction reaction;nonprecious-metal nanocatalysts;proton-exchange membrane fuel cell;graphene;HIGH-PERFORMANCE ELECTROCATALYSTS;ORGANIC FRAMEWORK;ACTIVE-SITES;FE-N/C;METAL;EFFICIENT;ZIF-8;NANOPARTICLES;ACTIVATION;ALKALINE,chmyyl@ccu.edu.tw,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2574-0962,,,,English,ACS APPL ENERG MATER,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000757815300001,,Taiwan,ccu.edu.tw,Natl Chung Cheng Univ,"Natl Chung Cheng Univ, Taiwan","Lin, Yu-Jui; Tsai, Jui-En; Huang, Cheng-Che; Chen, Yong-Song; Li, Yuan-Yao"
"Luo, J.M., Tang, H.B., Tian, X.L., Hou, S.Y., Li, X.H., Du, L., Liao, S.J.",Highly Selective TiN-Supported Highly Dispersed Pt Catalyst: Ultra Active toward Hydrogen Oxidation and Inactive toward Oxygen Reduction,2018,ACS APPLIED MATERIALS & INTERFACES,10,4,,3530,3537,8,53,10.1021/acsami.7b15159,,"[Liao, Shijun] South China Univ Technol, Key Lab Fuel Cell Technol Guangdong Prov, Sch Chem & Chem Engn, Guangzhou 510641, Guangdong, Peoples R China; South China Univ Technol, Key Lab New Energy Technol Guangdong Univ, Sch Chem & Chem Engn, Guangzhou 510641, Guangdong, Peoples R China",,"The severe dissolution of the cathode catalyst, caused by an undesired oxygen reduction reaction at the anode during startup and shutdown, is a fatal challenge to practical applications of polymer electrolyte membrane fuel cells. To address this important issue, according to the distinct structure sensitivity between the sigma-type bond in H-2 and the pi-type bond in O-2, we design a HD-Pt/TiN material by highly dispersing Pt on the TiN surface to inhibit the unwanted oxygen reduction reaction. The highly dispersed Pt/TiN catalyst exhibits excellent selectivity toward hydrogen oxidation and oxygen reduction reactions. With a Pt loading of 0.88 wt %, our catalyst shows excellent hydrogen oxidation reaction activity, close to that of commercial 20 wt % Pt/C catalyst, and much lower oxygen reduction reaction activity than the commercial 20 wt % Pt/C catalyst. The lack of well-ordered Pt facets is responsible for the excellent selectivity of the HD-Pt/TiN materials toward hydrogen oxidation and oxygen reduction reactions. Our work provides a new and cost-effective solution to design selective catalysts toward hydrogen oxidation and oxygen reduction reactions, making the strategy of using oxygen-tolerant anode catalyst to improve the stability of polymer electrolyte membrane fuel cells during startup and shutdown more affordable and practical.",platinum; hydrogen oxidation reaction; oxygen reduction reaction; structure sensitivity; polymer electrolyte membrane fuel cells,SINGLE-ATOM CATALYST; TITANIUM NITRIDE; FUEL-CELLS; PLATINUM; NANOPARTICLES; PERFORMANCE; SURFACES,platinum;hydrogen oxidation reaction;oxygen reduction reaction;structure sensitivity;polymer electrolyte membrane fuel cells;SINGLE-ATOM CATALYST;TITANIUM NITRIDE;FUEL-CELLS;NANOPARTICLES;PERFORMANCE;SURFACES,chsjliao@scut.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1944-8244,,,29300084,English,ACS APPL MATER INTER,Article,WoS,Science & Technology - Other Topics; Materials Science,WOS:000424728800043,,China,scut.edu.cn,South China Univ Technol;Key Lab New Energy Technol Guangdong Univ,"South China Univ Technol, China;Key Lab New Energy Technol Guangdong Univ, China","Luo, Junming; Tang, Haibo; Tian, Xinlong; Hou, Sanying; Li, Xiuhua; Du, Li; Liao, Shijun"
"Yin, F.X., Li, G.R.",Highly stable Ti-Co-Phen/C catalyst as the cathode for proton exchange membrane fuel cells,2014,INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,39,19,,10253,10257,5,3,10.1016/j.ijhydene.2014.04.175,,"[Yin, Fengxiang] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China; [Yin, Fengxiang; Li, Guoru] Beijing Univ Chem Technol, Changzhou Inst Adv Mat, Changzhou 213164, Peoples R China",,"A Ti-Co-Phen/C catalyst was prepared for polymer electrolyte membrane fuel cells (PEMFCs) without precious metals using a modified polymer complex (PC) method with 1,10-phenanthroline (Phen) as the nitrogen precursor. The oxygen reduction reaction (ORR) activity of the Ti-Co-Phen/C catalyst was significantly higher than the ORR activity of the Ti-Co/C catalyst prepared with the PC method because the former had a larger N surface content due to its highly dispersed Co species. The catalyst also exhibited excellent chemical stability in acidic media due to the probable strong interactions between the highly dispersed Ti and Co species. A H-2/O-2 PEMFC using the Ti-Co-Phen/C catalyst as the cathode demonstrated excellent cell performance. A 0.68 W cm(-2) maximum power density was obtained. The cell performance stability did not drop perceptibly during its 550-h lifetime at 0.5 V and its 300-h lifetime at 0.7 V. The prepared Ti-Co-Phen/C catalyst exhibited both high ORR activity and excellent performance stability, making it a promising alternative for the cathode catalysts in PEMFCs. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.","Oxygen reduction reaction; Non-precious metal catalyst; 1,10-phenanthroline; Polymer complex; Polymer electrolyte membrane fuel cells",OXYGEN-REDUCTION REACTION; METAL-CATALYSTS; ELECTROCATALYSTS; PERFORMANCE; IRON; NIOBIUM,"Oxygen reduction reaction;Non-precious metal catalyst;1,10-phenanthroline;Polymer complex;Polymer electrolyte membrane fuel cells;OXYGEN-REDUCTION REACTION;METAL-CATALYSTS;ELECTROCATALYSTS;PERFORMANCE;IRON;NIOBIUM",yinfx@mail.buct.edu.cn,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0360-3199,,,,English,INT J HYDROGEN ENERG,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels,WOS:000338406400031,2-s2.0-84901943262,China,mail.buct.edu.cn,Beijing Univ Chem Technol,"Beijing Univ Chem Technol, China","Yin, Fengxiang; Li, Guoru"
"Ratso, S., Kaarik, M., Kook, M., Paiste, P., Aruvali, J., Vlassov, S., Kisand, V., Leis, J., Kannan, A.M., Tammeveski, K.",High performance catalysts based on Fe/N co-doped carbide-derived carbon and carbon nanotube composites for oxygen reduction reaction in acid media,2019,International Journal of Hydrogen Energy,44,25,,12636,12648,,42,10.1016/j.ijhydene.2018.11.080,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85057594971&doi=10.1016%2Fj.ijhydene.2018.11.080&partnerID=40&md5=794988892ddf8b5e7f49afc758cc9d7f,"Institute of Chemistry, Tartu Ülikool, Tartu, Tartumaa, Estonia; Institute of Physics, Tartu Ülikool, Tartu, Tartumaa, Estonia; Department of Geology, Tartu Ülikool, Tartu, Tartumaa, Estonia; Ira A. Fulton Schools of Engineering, Tempe, AZ, United States","Ratso, Sander, Institute of Chemistry, Tartu Ülikool, Tartu, Tartumaa, Estonia; Käärik, Maike, Institute of Chemistry, Tartu Ülikool, Tartu, Tartumaa, Estonia; Kook, Mati, Institute of Physics, Tartu Ülikool, Tartu, Tartumaa, Estonia; Paiste, Päärn, Department of Geology, Tartu Ülikool, Tartu, Tartumaa, Estonia; Aruväli, Jaan, Department of Geology, Tartu Ülikool, Tartu, Tartumaa, Estonia; Vlassov, Sergei, Institute of Physics, Tartu Ülikool, Tartu, Tartumaa, Estonia; Kisand, Vambola, Institute of Physics, Tartu Ülikool, Tartu, Tartumaa, Estonia; Leis, Jaan, Institute of Chemistry, Tartu Ülikool, Tartu, Tartumaa, Estonia; Kannan, Arunachalanadar Mada, Ira A. Fulton Schools of Engineering, Tempe, AZ, United States; Tammeveski, Kaido, Institute of Chemistry, Tartu Ülikool, Tartu, Tartumaa, Estonia","The key issue of modern electrochemical technology is clean energy production and storage. Proton exchange membrane fuel cells (PEMFC)offer a way to produce electricity from hydrogen, but are hindered by the sluggish reduction of oxygen into water on the cathode, which requires Pt/C catalysts. Iron-nitrogen-carbon (Fe-N-C)catalysts have been shown in recent years to be viable alternatives. Here, we present highly performing Fe-N-C catalysts based on composite materials synthesised from carbide-derived carbon (CDC)and carbon nanotubes (CNT). B<inf>4</inf>C, Mo<inf>2</inf>C and TiC, which yield CDC materials with different porosity were chosen as the starting carbides, which are then doped with Fe, N and composited with CNTs using ball-milling and pyrolysis. 1,10-phenanthroline (Phen)and dicyandiamide (DCDA)serve as the nitrogen sources and Fe(II)acetate as the iron source. The catalyst derived from TiC shows a remarkable half-wave potential for oxygen reduction of 0.8 V vs RHE, which shifts negative 36 mV during 5000 potential cycles at 70 °C, while the composite material derived from it is more stable with a shift of only 15 mV during the same period. © 2018 Hydrogen Energy Publications LLC",Carbide-derived carbon; Carbon nanotubes; Electrocatalysis; Fe-N-C catalyst; Fuel cell; Oxygen reduction,"Ball milling; Boron carbide; Carbides; Carbon nanotubes; Catalysts; Composite materials; Electrocatalysis; Electrolytic reduction; Fuel cells; Nitrogen; Oxygen; Oxygen reduction reaction; Proton exchange membrane fuel cells (PEMFC); Titanium carbide; Titanium compounds; 1 ,10-phenanthroline; Carbide derived carbon; Carbon-nanotube composites; Electrochemical technology; Half-wave potential; Nitrogen sources; Oxygen Reduction; Reduction of oxygen; Iron compounds","Carbide-derived carbon;Carbon nanotubes;Electrocatalysis;Fe-N-C catalyst;Fuel cell;Oxygen reduction;Ball milling;Boron carbide;Carbides;Catalysts;Composite materials;Electrolytic reduction;Fuel cells;Nitrogen;Oxygen;Oxygen reduction reaction;Proton exchange membrane fuel cells (PEMFC);Titanium carbide;Titanium compounds;1 ,10-phenanthroline;Carbide derived carbon;Carbon-nanotube composites;Electrochemical technology;Half-wave potential;Nitrogen sources;Reduction of oxygen;Iron compounds","K. Tammeveski; Institute of Chemistry, University of Tartu, Tartu, Ravila 14a, 50411, Estonia; email: kaido.tammeveski@ut.ee",,,,,,Elsevier Ltd,03603199,0080311393,IJHED,,English,Int J Hydrogen Energy,Article,Scopus,,2-s2.0-85057594971,,Estonia;United States,ut.ee,,,"Ratso, S.; Kaarik, M.; Kook, M.; Paiste, P.; Aruvali, J.; Vlassov, S.; Kisand, V.; Leis, J.; Kannan, A.M.; Tammeveski, K."
"Zhang, H., Chung, H.T., Cullen, D.A., Wagner, S., Kramm, U.I., More, K.L., Zelenay, P., Wu, G.",High-performance fuel cell cathodes exclusively containing atomically dispersed iron active sites,2019,Energy and Environmental Science,12,8,,2548,2558,,549,10.1039/c9ee00877b,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85070975488&doi=10.1039%2Fc9ee00877b&partnerID=40&md5=2d62da5d5a1d60b31ea4cc018e39ed0d,"School of Engineering and Applied Sciences, Buffalo, NY, United States; Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Department of Materials and Earth Sciences, Technische Universität Darmstadt, Darmstadt, Hessen, Germany; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States","Zhang, Hanguang, School of Engineering and Applied Sciences, Buffalo, NY, United States; Chung, Hoon Taek, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Cullen, David A., Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Wagner, Stephan, Department of Materials and Earth Sciences, Technische Universität Darmstadt, Darmstadt, Hessen, Germany; Kramm, Ulrike Ingrid, Department of Materials and Earth Sciences, Technische Universität Darmstadt, Darmstadt, Hessen, Germany; More, Karren L., Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Zelenay, Piotr S., Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Wu, Gang, School of Engineering and Applied Sciences, Buffalo, NY, United States","Platinum group metal-free (PGM-free) catalysts for the oxygen reduction reaction (ORR) with atomically dispersed FeN<inf>4</inf> sites have emerged as a potential replacement for low-PGM catalysts in acidic polymer electrolyte fuel cells (PEFCs). In this work, we carefully tuned the doped Fe content in zeolitic imidazolate framework (ZIF)-8 precursors and achieved complete atomic dispersion of FeN<inf>4</inf> sites, the sole Fe species in the catalyst based on Mößbauer spectroscopy data. The Fe-N-C catalyst with the highest density of active sites achieved respectable ORR activity in rotating disk electrode (RDE) testing with a half-wave potential (E<inf>1/2</inf>) of 0.88 ± 0.01 V vs. the reversible hydrogen electrode (RHE) in 0.5 M H<inf>2</inf>SO<inf>4</inf> electrolyte. The activity degradation was found to be more significant when holding the potential at 0.85 V relative to standard potential cycling (0.6-1.0 V) in O<inf>2</inf> saturated acid electrolyte. The post-mortem electron microscopy analysis provides insights into possible catalyst degradation mechanisms associated with Fe-N coordination cleavage and carbon corrosion. High ORR activity was confirmed in fuel cell testing, which also divulged the promising performance of the catalysts at practical PEFC voltages. We conclude that the key factor behind the high ORR activity of the Fe-N-C catalyst is the optimum Fe content in the ZIF-8 precursor. While too little Fe in the precursors results in an insufficient density of FeN<inf>4</inf> sites, too much Fe leads to the formation of clusters and an ensuing significant loss in catalytic activity due to the loss of atomically dispersed Fe to inactive clusters or even nanoparticles. Advanced electron microscopy was used to obtain insights into the clustering of Fe atoms as a function of the doped Fe content. The Fe content in the precursor also affects other key catalyst properties such as the particle size, porosity, nitrogen-doping level, and carbon microstructure. Thanks to using model catalysts exclusively containing FeN<inf>4</inf> sites, it was possible to directly correlate the ORR activity with the density of FeN<inf>4</inf> species in the catalyst. © The Royal Society of Chemistry 2019.",,Carbon; Corrosion; Degradation; Electrodes; Electrolytic reduction; Electron microscopes; Electron microscopy; Iron; Particle size; Particle size analysis; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Rotating disks; Solid electrolytes; Carbon microstructures; Electron microscopy analysis; High performance fuel cells; Oxygen reduction reaction; Platinum group metals; Reversible hydrogen electrodes; Rotating disk electrodes; Zeolitic imidazolate frameworks; Catalyst activity; catalyst; electrode; electrolyte; fuel cell; iron; performance assessment; reduction,Carbon;Corrosion;Degradation;Electrodes;Electrolytic reduction;Electron microscopes;Electron microscopy;Iron;Particle size;Particle size analysis;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Rotating disks;Solid electrolytes;Carbon microstructures;Electron microscopy analysis;High performance fuel cells;Oxygen reduction reaction;Platinum group metals;Reversible hydrogen electrodes;Rotating disk electrodes;Zeolitic imidazolate frameworks;Catalyst activity;catalyst;electrode;electrolyte;fuel cell;performance assessment;reduction,"P. Zelenay; Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, 87545, United States; email: zelenay@lanl.gov",,,,,,Royal Society of Chemistry,17545692,,,,English,Energy Environ. Sci.,Article,Scopus,,2-s2.0-85070975488,,United States;Germany,lanl.gov,,,"Zhang, H.; Chung, H.T.; Cullen, D.A.; Wagner, S.; Kramm, U.I.; More, K.L.; Zelenay, P.; Wu, G."
"Sudarsono, W., Wong, W.Y., Loh, K.S., Majlan, E.H., Syarif, N., Kok, K.Y., Mohamad Yunus, R.M., Lim, K.L.",High performance iron-based oxygen reduction catalyst supported on sengon wood-derived reduced graphene oxide in acidic medium,2020,IOP Conference Series: Earth and Environmental Science,463,1,12060,,,,1,10.1088/1755-1315/463/1/012060,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85083431356&doi=10.1088%2F1755-1315%2F463%2F1%2F012060&partnerID=40&md5=bc2ca0e4bf5203553e02241d4b58724d,"Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia; Department of Chemistry, Universitas Sriwijaya, Indralaya, South Sumatra, Indonesia; Agensi Nuklear Malaysia, Bangi, Selangor, Malaysia","Sudarsono, Wulandhari, Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia; Wong, W. Y., Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia; Loh, Kee Shyuan, Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia; Majlan, E. H., Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia; Syarif, Nirwan, Department of Chemistry, Universitas Sriwijaya, Indralaya, South Sumatra, Indonesia; Kok, Kuanying, Agensi Nuklear Malaysia, Bangi, Selangor, Malaysia; Mohamad Yunus, Rozan, Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia; Lim, Kean Long, Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia","Non-precious metals (NPM) such as iron and nitrogen-doped carbon (Fe-N-C) have been actively studied as alternative electrocatalysts to platinum for oxygen reduction reaction (ORR) in proton exchange membrane fuel cell (PEMFC). However, its low stability is associated to the structural morphology of the electrode made of Fe-N-C and its support that has restricted the mass transfer of fuel and product. In this work, it was attempted to assess the role of RGO derived from sengon wood as catalyst support to Fe-N-C catalyst, and study the effect of the FeN-C to RGO ratio, on the ORR activity and durability in acidic medium. This work revealed that Fe-N-C/RGO at the weight ratio of 2:0.2 demonstrated the highest onset potential of 0.91 V, with high limiting current density of 5.7 mA/cm2, owing to the uniform active site distribution on the Fe-N-C/RGO surface compared to other samples with different weight ratio. It was indicated in this work that an improve in the kinetic activity was observed with increase operating temperature from 25 to 80 oC. An electron transfer number of 3.91 indicating a complete oxygen reduction process took place on the catalyst. The durability test showed that Fe-N-C/RGO 2:0.2 retained 89 % of its current density at 0.25 V over a duration of 16000 s, higher than that of the benchmark Pt/C. These results have collectively demonstrated a high performance sustainable noble metal-free ORR catalyst for PEMFC applications with proper tailoring the mass ratio of Fe-N-C to RGO support. © 2020 Institute of Physics Publishing. All rights reserved.",Catalyst support; Fe-N-C/RGO 2:x; ORR activity and durability; Porous structure,Doping (additives); Durability; Electrocatalysts; Electrolytic reduction; Energy conservation; Environmental technology; Graphene; Iron; Iron compounds; Mass transfer; Morphology; Oxygen; Oxygen reduction reaction; Precious metals; Proton exchange membrane fuel cells (PEMFC); Electron transfer; Limiting current density; Nitrogen-doped carbons; Non-precious metals; Operating temperature; Oxygen reduction catalysts; Oxygen reduction process; Structural morphology; Catalyst supports,Catalyst support;Fe-N-C/RGO 2:x;ORR activity and durability;Porous structure;Doping (additives);Durability;Electrocatalysts;Electrolytic reduction;Energy conservation;Environmental technology;Graphene;Iron;Iron compounds;Mass transfer;Morphology;Oxygen;Oxygen reduction reaction;Precious metals;Proton exchange membrane fuel cells (PEMFC);Electron transfer;Limiting current density;Nitrogen-doped carbons;Non-precious metals;Operating temperature;Oxygen reduction catalysts;Oxygen reduction process;Structural morphology;Catalyst supports,"W.Y. Wong; Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, Selangor, 43600 UKM, Malaysia; email: waiyin.wong@ukm.edu.my","Tong, C.W.; Chin-Tsan, W.; Huat, B.S.L.; Xiang, X.",,"International Conference on Sustainable Energy and Green Technology 2019, SEGT 2019",Bangkok,2019-12-11 through 2019-12-14,Institute of Physics Publishing helen.craven@iop.org,17551307,,,,English,IOP Conf. Ser. Earth Environ. Sci.,Conference paper,Scopus,,2-s2.0-85083431356,,Malaysia;Indonesia,ukm.edu.my,,,"Sudarsono, W.; Wong, W.Y.; Loh, K.S.; Majlan, E.H.; Syarif, N.; Kok, K.Y.; Mohamad Yunus, R.M.; Lim, K.L."
"Yuan, W., Zeng, L., Jiang, S., Yuan, C., He, Q., Wang, J., Liao, Q., Wei, Z.",High performance poly(carbazolyl aryl piperidinium) anion exchange membranes for alkaline fuel cells,2022,Journal of Membrane Science,657,,120676,,,,105,10.1016/j.memsci.2022.120676,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85131401938&doi=10.1016%2Fj.memsci.2022.120676&partnerID=40&md5=a0e135393ad61a2847e5777b1f4c1cd7,"Chongqing University, Chongqing, China; Chongqing University, Chongqing, China; School of Energy and Power Engineering, Chongqing University, Chongqing, China","Yuan, Wei, Chongqing University, Chongqing, China; Zeng, Lingping, Chongqing University, Chongqing, China; Jiang, Shangkun, Chongqing University, Chongqing, China; Yuan, Caili, Chongqing University, Chongqing, China; He, Qian, Chongqing University, Chongqing, China; Wang, Jianchuan, Chongqing University, Chongqing, China, Chongqing University, Chongqing, China; Liao, Qiang, School of Energy and Power Engineering, Chongqing University, Chongqing, China; Wei, Zidong, Chongqing University, Chongqing, China, Chongqing University, Chongqing, China","Anion exchange membrane fuel cells (AEMFCs) is a potential substitute to the prevailing proton exchange membrane fuel cells (PEMFCs), since non-precious metal catalysts can be applied in the AEMFCs, leading to much lower cost of it. However, anion exchange membranes (AEMs), as a crucial component of the AEMFCs, has always been a challenge in the commercialization of AEMFCs, such as poor life-time and conductivity. Herein, a series of poly(carbazolyl aryl piperidinium) AEMs and ionomers are prepared with non-rotatable rigid carbazole group next to piperidinium ring on the polymer backbone for the first time, and the membranes were fabricated by mass production method of tape-casting. The membranes exhibit extraordinary comprehensive performance, for instance, high hydroxide conductivity up to 204.8 mS cm−1 at 90 °C, good mechanical strength of >50 MPa in wet state, low hydrogen permeability and excellent alkaline stability of only 3% decline after 2100 h in 1 M KOH at 80 °C. Fuel cell (H<inf>2</inf>–O<inf>2</inf>) based on the as-prepared membranes and ionomers shows outstanding peak power density of 1.72 W cm−2 at a quite low back pressure of 20 kPa, and only 2.6% decay was observed after 120 h. © 2022",Alkaline stability; Anion exchange membrane; Carbazole; Fuel cell; Ion conductivity,Alkaline fuel cells; Catalysts; Ion exchange; Ionomers; Ions; Mechanical permeability; Polycyclic aromatic hydrocarbons; Potassium hydroxide; Proton exchange membrane fuel cells (PEMFC); Alkaline stability; Alkalines; Anion-exchange membrane fuel cells; Carbazolyl; Cell-be; Cell/B.E; Cell/BE; Ion conductivities; Performance; Piperidinium; Ion exchange membranes; copolymer; hydrogen; hydroxide; monomer; poly(carbazolyl aryl piperidinium); polymer; unclassified drug; alkalinity; alternating current; anion exchange; Article; cell density; chemical structure; conductance; ion exchange; membrane; permeability; proton nuclear magnetic resonance; quaternization; scanning electron microscopy; size exclusion chromatography; synthesis; temperature; thermostability; titrimetry; X ray crystallography; Ion Exchange; Potassium Hydroxide,Alkaline stability;Anion exchange membrane;Carbazole;Fuel cell;Ion conductivity;Alkaline fuel cells;Catalysts;Ion exchange;Ionomers;Ions;Mechanical permeability;Polycyclic aromatic hydrocarbons;Potassium hydroxide;Proton exchange membrane fuel cells (PEMFC);Alkalines;Anion-exchange membrane fuel cells;Carbazolyl;Cell-be;Cell/B.E;Cell/BE;Ion conductivities;Performance;Piperidinium;Ion exchange membranes;copolymer;hydrogen;hydroxide;monomer;poly(carbazolyl aryl piperidinium);polymer;unclassified drug;alkalinity;alternating current;anion exchange;Article;cell density;chemical structure;conductance;membrane;permeability;proton nuclear magnetic resonance;quaternization;scanning electron microscopy;size exclusion chromatography;synthesis;temperature;thermostability;titrimetry;X ray crystallography,"Z. Wei; School of Chemistry & Chemical Engineering, Chongqing University, Chongqing, 400044, China; email: zdwei@cqu.edu.cn; J. Wang; School of Chemistry & Chemical Engineering, Chongqing University, Chongqing, 400044, China; email: jxw319@cqu.edu.cn",,,,,,Elsevier B.V.,03767388,,JMESD,,English,J. Membr. Sci.,Article,Scopus,,2-s2.0-85131401938,,China,cqu.edu.cn,,,"Yuan, W.; Zeng, L.; Jiang, S.; Yuan, C.; He, Q.; Wang, J.; Liao, Q.; Wei, Z."
"Huang, H.C., Wang, C.H., Shown, I., Chang, S.T., Hsu, H.C., Du, H.Y., Chen, L.C., Chen, K.H.",High-performance pyrolyzed iron corrole as a potential non-precious metal catalyst for PEMFCs,2013,Journal of Materials Chemistry A,1,46,,14692,14699,,24,10.1039/c3ta13515b,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84887246524&doi=10.1039%2Fc3ta13515b&partnerID=40&md5=37169df8616ccb7c3ade43be14b0109f,"Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Academia Sinica, Institute of Atomic and Molecular Sciences, Taipei, Taiwan; Center for Condensed Matter Sciences, National Taiwan University, Taipei, Taiwan","Huang, Hsin Chih, Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Wang, Chenhao, Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Shown, Indrajit, Academia Sinica, Institute of Atomic and Molecular Sciences, Taipei, Taiwan; Chang, Suntang, Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Hsu, Hsincheng, Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Du, Heyun, Academia Sinica, Institute of Atomic and Molecular Sciences, Taipei, Taiwan; Chen, Li Chyong, Center for Condensed Matter Sciences, National Taiwan University, Taipei, Taiwan; Chen, Kuei-Hsien, Academia Sinica, Institute of Atomic and Molecular Sciences, Taipei, Taiwan, Center for Condensed Matter Sciences, National Taiwan University, Taipei, Taiwan","This work demonstrates the performance of carbon black-supported pyrolyzed Fe-corrole (py-Fe-corrole/C) as a cathode catalyst for the oxygen reduction reaction (ORR) in PEMFCs. The ORR measurements reveal that the py-Fe-corrole/C exhibits good ORR activity, via the direct four-electron reduction pathway, in the reduction of O<inf>2</inf> to H<inf>2</inf>O. The H<inf>2</inf>-O <inf>2</inf> PEMFC produces high activity and good stability. The enhanced ORR activity is attributable to the network structure of poly-aromatic hydrocarbons, the quaternary (graphitic)-type nitrogen and the coordination structure of the py-Fe-corrole/C. Square wave voltammetry has been applied to the py-Fe-corrole/C to perform a redox reaction of Fe(ii)/Fe(iii) at 0.6 V. Finally, detailed in situ X-ray adsorption spectroscopy has been applied to determine the ORR mechanism of py-Fe-corrole/C. © 2013 The Royal Society of Chemistry.",,Cathode catalyst; Coordination structures; Four-electron reduction; Good stability; Network structures; Non-precious metal catalysts; Oxygen reduction reaction; Square wave voltammetry; Catalysts; Electrolytic reduction; Redox reactions; Voltammetry; Polypyrroles,Cathode catalyst;Coordination structures;Four-electron reduction;Good stability;Network structures;Non-precious metal catalysts;Oxygen reduction reaction;Square wave voltammetry;Catalysts;Electrolytic reduction;Redox reactions;Voltammetry;Polypyrroles,"C.-H. Wang; Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan; email: chwang@mail.ntust.edu.tw",,,,,,,20507488,,JMCAE,,English,J. Mater. Chem. A,Article,Scopus,,2-s2.0-84887246524,,Taiwan,mail.ntust.edu.tw,,,"Huang, H.-C.; Wang, C.-H.; Shown, I.; Chang, S.-T.; Hsu, H.-C.; Du, H.-Y.; Chen, L.-C.; Chen, K.-H."
"Chen, M., Li, C., Zhang, B., Zeng, Y., Karakalos, S., Hwang, S., Xie, J., Wu, G.",High-Platinum-Content Catalysts on Atomically Dispersed and Nitrogen Coordinated Single Manganese Site Carbons for Heavy-Duty Fuel Cells,2022,Journal of the Electrochemical Society,169,3,034510,,,,30,10.1149/1945-7111/ac58c7,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85126698363&doi=10.1149%2F1945-7111%2Fac58c7&partnerID=40&md5=e5519dfbfcca65f88f64135bc446548d,"School of Engineering and Applied Sciences, Buffalo, NY, United States; Department of Mechanical and Energy Engineering, College of Engineering, West Lafayette, IN, United States; Purdue University, West Lafayette, IN, United States; Molinaroli College of Engineering and Computing, Columbia, SC, United States; Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, United States","Chen, Mengjie, School of Engineering and Applied Sciences, Buffalo, NY, United States; Li, Chenzhao, Department of Mechanical and Energy Engineering, College of Engineering, West Lafayette, IN, United States, Purdue University, West Lafayette, IN, United States; Zhang, Bingzhang, School of Engineering and Applied Sciences, Buffalo, NY, United States; Zeng, Yachao, School of Engineering and Applied Sciences, Buffalo, NY, United States; Karakalos, Stavros G., Molinaroli College of Engineering and Computing, Columbia, SC, United States; Hwang, Sooyeon, Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, United States; Xie, Jian, Department of Mechanical and Energy Engineering, College of Engineering, West Lafayette, IN, United States; Wu, Gang, School of Engineering and Applied Sciences, Buffalo, NY, United States","Fuel cells for heavy-duty vehicles (HDVs) have attracted considerable attention because of their unique scalability, better fuel economy, the less demand for hydrogen refilling infrastructure. However, the potential application requires more stringent fuel cell durability up to 25,000 h. Membrane electrode assemblies (MEAs) made from platinum group metal (PGM) catalyst with relatively high loading 0.3 mgPt cm-2play a crucial role in ensuring high-power and long-term durability. Integrating fine PGM nanoparticles and robust carbon support with strengthened interactions is critical for improving MEA performance and durability. Herein, a unique atomically dispersed and nitrogen coordinated single Mn site-rich carbon (M-N-C) support was developed for high content (40 wt%) platinum catalysts for the oxygen reduction reaction (ORR) cathode with reduced thickness. Compared with two controls studied in this work (e.g., a porous graphitic carbon-supported Pt and a commercial TKK Pt/C catalysts), the Pt (40 wt%)/Mn-N-C catalyst exhibited much enhanced catalytic activity and stability for the ORR in both aqueous acidic electrolyte and polymer electrolyte-based MEA. We carefully elucidated the-role of the Mn-N-C support in promoting Pt catalyst concerning its high surface area, partially graphitic structure, and nitrogen dopants, providing better Pt nanoparticle dispersion, and strengthened interactions between Pt and carbon. Consequently, the MEA from the Pt (40 wt%)/Mn-N-C catalyst generated a 1.61 A cm-2at 0.7 V based on HDV conditions (0.2 mgPt cm-2and 250 kPa air). More importantly, the MEA is highly durable and can retain 1.31 A cm-2at 0.7 V after 30,000 voltage cycles (∼19% loss), surpassing the commercial Pt/C catalyst (loss of ∼56%). Therefore, the Mn-N-C carbon-supported Pt catalyst holds a great promise to meet the challenging DOE target (1.07 A cm-2at 0.7 V after 150,000 cycles) for HDVs. © 2022 Electrochemical Society Inc.. All rights reserved.",,Catalyst activity; Catalyst supports; Coordination reactions; Durability; Electrocatalysts; Electrodes; Electrolytic reduction; Manganese; Nanoparticles; Nitrogen; Platinum; Polyelectrolytes; Porous materials; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Carbon support; Carbon-supported Pt; Heavy duty; Heavy duty vehicles; Membrane electrode assemblies; Oxygen reduction reaction; Platinum group metals; Pt/C catalysts; Stringents; ]+ catalyst; Carbon,Catalyst activity;Catalyst supports;Coordination reactions;Durability;Electrocatalysts;Electrodes;Electrolytic reduction;Manganese;Nanoparticles;Nitrogen;Platinum;Polyelectrolytes;Porous materials;Proton exchange membrane fuel cells (PEMFC);Solid electrolytes;Carbon support;Carbon-supported Pt;Heavy duty;Heavy duty vehicles;Membrane electrode assemblies;Oxygen reduction reaction;Platinum group metals;Pt/C catalysts;Stringents;]+ catalyst;Carbon,,,,,,,IOP Publishing Ltd,00134651,,JESOA,,English,J Electrochem Soc,Article,Scopus,,2-s2.0-85126698363,,United States,No email,,,"Chen, M.; Li, C.; Zhang, B.; Zeng, Y.; Karakalos, S.; Hwang, S.; Xie, J.; Wu, G."
"Liang, C.X., Liu, Y.G., Liu, Y.Y., Li, Y.Q., Lu, S.F., Xiang, Y.",High Power Density and Stable Fuel Cells with 18-Phosphomolybdic Acid as Oxygen Reduction Reaction Mediator,2025,SMALL,,,,,,9,1,10.1002/smll.202501048,,"[Liang, Chenxi; Liu, Yige; Liu, Yiyang; Li, Yunqi; Lu, Shanfu; Xiang, Yan] Beihang Univ, Sch Energy & Power Engn, Beijing Key Lab Bioinspired Energy Mat & Devices, Beijing 100191, Peoples R China",,"Mediated fuel cells (MedFCs) offer a promising alternative to proton exchange membrane fuel cells by addressing key challenges such as reliance on precious metal catalysts and complex water and thermal management through the use of redox mediators as efficient oxygen reduction reaction (ORR) facilitators. However, currently available mediators exhibit either low electrochemical activity or insufficient stability, which constrains the performance and durability of these fuel cells. In this study, a Dawson-type 18-molybdophosphoric heteropoly acid (18-PMA) with high redox activity and stability is introduced as an ORR mediator in mediated fuel cells, utilizing ordinary carbon felt electrodes. The mediated fuel cell employing 18-PMA achieved a maximum steady-state power density of 600 mW cm(-)2 under dry gas conditions and demonstrated stable discharge performance at current densities ranging from 100 to 500 mA cm(-)2, and the long-term stability is ensured through a simple and convenient replacement of the Fe-N-C catalyst in external reactor.",18-molybdophosphoric heteropoly acid; mediated fuel cell; oxygen reduction reaction mediator; polyoxometalate,ELECTROCHEMICAL O-2 REDUCTION; REDOX; PERFORMANCE,18-molybdophosphoric heteropoly acid;mediated fuel cell;oxygen reduction reaction mediator;polyoxometalate;ELECTROCHEMICAL O-2 REDUCTION;REDOX;PERFORMANCE,liuyiyang@buaa.edu.cn; lusf@buaa.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1613-6810,,,40255078,English,SMALL,Article; Early Access,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:001470711600001,2-s2.0-105005205186,China,buaa.edu.cn,Beihang Univ,"Beihang Univ, China","Liang, Chenxi; Liu, Yige; Liu, Yiyang; Li, Yunqi; Lu, Shanfu; Xiang, Yan"
"Uddin, A., Dunsmore, L., Zhang, H., Hu, L., Wu, G., Litster, S.",High Power Density Platinum Group Metal-free Cathodes for Polymer Electrolyte Fuel Cells,2020,ACS Applied Materials and Interfaces,12,2,,2216,2224,,111,10.1021/acsami.9b13945,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85077944763&doi=10.1021%2Facsami.9b13945&partnerID=40&md5=513ee5b6d72c3aa6397bf665e1c05b40,"College of Engineering, Pittsburgh, PA, United States; School of Engineering and Applied Sciences, Buffalo, NY, United States","Uddin, Aman, College of Engineering, Pittsburgh, PA, United States; Dunsmore, Lisa, College of Engineering, Pittsburgh, PA, United States; Zhang, Hanguang, School of Engineering and Applied Sciences, Buffalo, NY, United States; Hu, Leiming, College of Engineering, Pittsburgh, PA, United States; Wu, Gang, School of Engineering and Applied Sciences, Buffalo, NY, United States; Litster, Shawn E., College of Engineering, Pittsburgh, PA, United States","Low cost and high-performing platinum group metal-free (PGM-free) cathodes have the potential to transform the economics of polymer electrolyte fuel cell (PEFC) commercialization. Significant advancements have been made recently in terms of PGM-free catalyst activity and stability. However, before PGM-free catalysts become viable in PEFCs, several technical challenges must be addressed including cathode's fabrication, ionomer integration, and transport losses. Here, we present an integrated optimization of cathode performance that was achieved by simultaneously optimizing the catalyst morphology and electrode structure for high power density. The chemically doped metal-organic framework derived Fe-N-C catalyst we used allows precise tuning of the particle size over a wide range, enabling this unique study. Our results demonstrate the careful interplay between the catalyst primary particle size and the polymer electrolyte ionomer integration. The primary particles must be sufficiently large to permit uniform ionomer thin films throughout the surrounding pores, but not so large as to impact intraparticle transport to the active sites. The content of ionomer must be carefully balanced between sufficient loading for the complete catalyst coverage and adequate proton conductivity, while not being excessive and inducing large oxygen transport losses and liquid water flooding. With the optimal 100 nm size catalyst and ionomer loading, we achieved a high power density of 410 mW/cm2 at a rated voltage and a peak power density of 610 mW/cm2 in an automotive-relevant operating condition. © © 2019 American Chemical Society.",computed tomography; Fe-N-C catalyst; ionomer; metal-organic framework; platinum group metal-free; polymer electrolyte fuel cell,Catalyst activity; Cathodes; Computerized tomography; Costs; Ionomers; Iron compounds; Metal-Organic Frameworks; Morphology; Organometallics; Particle size; Platinum; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Cathode performance; Integrated optimization; Intra-particle transports; Peak power densities; Platinum group metals; Polymer electrolyte fuel cells; Primary particle size; Technical challenges; Polyelectrolytes,computed tomography;Fe-N-C catalyst;ionomer;metal-organic framework;platinum group metal-free;polymer electrolyte fuel cell;Catalyst activity;Cathodes;Computerized tomography;Costs;Ionomers;Iron compounds;Metal-Organic Frameworks;Morphology;Organometallics;Particle size;Platinum;Proton exchange membrane fuel cells (PEMFC);Solid electrolytes;Cathode performance;Integrated optimization;Intra-particle transports;Peak power densities;Platinum group metals;Polymer electrolyte fuel cells;Primary particle size;Technical challenges;Polyelectrolytes,"S. Litster; Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, 15213, United States; email: litster@andrew.cmu.edu",,,,,,American Chemical Society service@acs.org,19448244,,,31850728,English,ACS Appl. Mater. Interfaces,Article,Scopus,,2-s2.0-85077944763,,United States,andrew.cmu.edu,,,"Uddin, A.; Dunsmore, L.; Zhang, H.; Hu, L.; Wu, G.; Litster, S."
"Sanetuntikul, J., Shanmugam, S.",High pressure pyrolyzed non-precious metal oxygen reduction catalysts for alkaline polymer electrolyte membrane fuel cells,2015,Nanoscale,7,17,,7644,7650,,69,10.1039/c5nr00311c,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84929458952&doi=10.1039%2Fc5nr00311c&partnerID=40&md5=56eeeb5833879df0016b0883f99f3ec7,"Daegu Gyeongbuk Institute of Science and Technology, Daegu, South Korea","Sanetuntikul‬, Jakkid, Daegu Gyeongbuk Institute of Science and Technology, Daegu, South Korea; Shanmugam, Sangaraju, Daegu Gyeongbuk Institute of Science and Technology, Daegu, South Korea","Non-precious metal catalysts, such as metal-coordinated to nitrogen doped-carbon, have shown reasonable oxygen reduction reaction (ORR) performances in alkaline fuel cells. In this report, we present the development of a highly active, stable and low-cost non-precious metal ORR catalyst by direct synthesis under autogenic-pressure conditions. Transmission electron microscopy studies show highly porous Fe-N-C and Co-N-C structures, which were further confirmed by Brunauer-Emmett-Teller surface area measurements. The surface areas of the Fe-N-C and Co-N-C catalysts were found to be 377.5 and 369.3 m2 g-1, respectively. XPS results show the possible existence of N-C and M-N<inf>x</inf> structures, which are generally proposed to be the active sites in non-precious metal catalysts. The Fe-N-C electrocatalyst exhibits an ORR half-wave potential 20 mV higher than the reference Pt/C catalyst. The cycling durability test for Fe-N-C over 5000 cycles shows that the half-wave potential lost only 4 mV, whereas the half-wave potential of the Pt/C catalyst lost about 50 mV. The Fe-N-C catalyst exhibited an improved activity and stability compared to the reference Pt/C catalyst and it possesses a direct 4-electron transfer pathway for the ORR process. Further, the Fe-N-C catalyst produces extremely low HO<inf>2</inf>- content, as confirmed by the rotating ring-disk electrode measurements. In the alkaline fuel single cell tests, maximum power densities of 75 and 80 mW cm-2 were observed for the Fe-N-C and Pt/C cathodes, respectively. Durability studies (100 h) showed that decay of the fuel cell current was more prominent for the Pt/C cathode catalyst compared to the Fe-N-C cathode catalyst. Therefore, the Fe-N-C catalyst appears to be a promising new class of non-precious metal catalysts prepared by an autogenic synthetic method. © The Royal Society of Chemistry 2015.",,Alkaline fuel cells; Catalyst activity; Cathodes; Cobalt metallography; Coordination reactions; Doping (additives); Durability; Electrocatalysts; Electrolytic reduction; High resolution transmission electron microscopy; Iron compounds; Iron metallography; Oxygen; Oxygen reduction reaction; Platinum compounds; Polyelectrolytes; Precious metals; Proton exchange membrane fuel cells (PEMFC); Alkaline polymer electrolyte membrane; Brunauer-emmett-teller surface areas; Improved activities; Maximum power density; Nitrogen-doped carbons; Non-precious metal catalysts; Oxygen reduction catalysts; Rotating ring-disk electrode; C (programming language),Alkaline fuel cells;Catalyst activity;Cathodes;Cobalt metallography;Coordination reactions;Doping (additives);Durability;Electrocatalysts;Electrolytic reduction;High resolution transmission electron microscopy;Iron compounds;Iron metallography;Oxygen;Oxygen reduction reaction;Platinum compounds;Polyelectrolytes;Precious metals;Proton exchange membrane fuel cells (PEMFC);Alkaline polymer electrolyte membrane;Brunauer-emmett-teller surface areas;Improved activities;Maximum power density;Nitrogen-doped carbons;Non-precious metal catalysts;Oxygen reduction catalysts;Rotating ring-disk electrode;C (programming language),"S. Shanmugam; Department of Energy Systems Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, 711-873, South Korea; email: sangarajus@dgist.ac.kr",,,,,,Royal Society of Chemistry,20403364,,,,English,Nanoscale,Article,Scopus,,2-s2.0-84929458952,,South Korea,dgist.ac.kr,,,"Sanetuntikul, J.; Shanmugam, S."
"Sun, F., Liu, T., Huang, M., Guan, L.",High specific surface area Fe-N-C electrocatalysts for the oxygen reduction reaction synthesized by a hard-template-assisted ball milling strategy,2023,Sustainable Energy and Fuels,7,15,,3675,3683,,13,10.1039/d3se00537b,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85164319309&doi=10.1039%2Fd3se00537b&partnerID=40&md5=bdc9a42dbdbf641d86e16ade88111159,"College of Chemistry, Fuzhou University, Fuzhou, Fujian, China; Fujian Institute of Research On the Structure of Matter Chinese Academy of Sciences, Fuzhou, Fujian, China","Sun, Feng, College of Chemistry, Fuzhou University, Fuzhou, Fujian, China, Fujian Institute of Research On the Structure of Matter Chinese Academy of Sciences, Fuzhou, Fujian, China; Liu, Tao, Fujian Institute of Research On the Structure of Matter Chinese Academy of Sciences, Fuzhou, Fujian, China; Huang, Meihua, College of Chemistry, Fuzhou University, Fuzhou, Fujian, China, Fujian Institute of Research On the Structure of Matter Chinese Academy of Sciences, Fuzhou, Fujian, China; Guan, Lunhui, College of Chemistry, Fuzhou University, Fuzhou, Fujian, China, Fujian Institute of Research On the Structure of Matter Chinese Academy of Sciences, Fuzhou, Fujian, China","Non-noble metal iron-based catalysts, featuring an abundant atomically dispersed Fe-nitrogen-carbon (Fe-N-C) structure, have been identified as highly promising alternatives to platinum group metal (PGM) catalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). However, there are still huge challenges in synthesizing high-performance Fe-N-C catalysts via the traditional mechanochemical method assisted only by the assisted liquid. In this study, we utilized a hard-template-assisted mechanochemical strategy followed by high-temperature pyrolysis to synthesize Fe-N-C catalysts with high specific surface area (1444.4 m2 g−1), due to the improved ZIF-8 precursor and the uniform distribution of the Fe-N-C motif. The introduction of NaCl as an unaltered hard template during the mechanochemical reaction not only improved the conversion efficiency and porous carbon framework of the precursor, but also optimized the distribution of the metal element, providing greater possibilities for the traditional ball milling method. Benefitting from the precise doping control and porous carbon framework, the optimized 2%Fe-ZIF@NaCl electrocatalyst demonstrated a high half wave potential (E<inf>1/2</inf> = 0.831 V) in acidic media and a promising maximum power density (504 mW cm−2) in H<inf>2</inf>-O<inf>2</inf> PEMFCs. The hard template expands the application scenarios of mechanochemical methods on the basis of the assisted liquid method. © 2023 The Royal Society of Chemistry.",,Ball milling; Carbon; Conversion efficiency; Electrolysis; Electrolytic reduction; Iron compounds; Milling (machining); Open circuit voltage; Oxygen; Porous materials; Precious metals; Sodium chloride; Specific surface area; Carbon catalysts; Carbon framework; Hard templates; High specific surface area; Mechano-chemical methods; Nitrogen-carbon; Oxygen reduction reaction; Porous carbons; Proton-exchange membranes fuel cells; Synthesised; Electrocatalysts; fuel cell; milling; platinum group element; pyrolysis; surface area; wave energy,Ball milling;Carbon;Conversion efficiency;Electrolysis;Electrolytic reduction;Iron compounds;Milling (machining);Open circuit voltage;Oxygen;Porous materials;Precious metals;Sodium chloride;Specific surface area;Carbon catalysts;Carbon framework;Hard templates;High specific surface area;Mechano-chemical methods;Nitrogen-carbon;Oxygen reduction reaction;Porous carbons;Proton-exchange membranes fuel cells;Synthesised;Electrocatalysts;fuel cell;milling;platinum group element;pyrolysis;surface area;wave energy,"M. Huang; College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China; email: meihuahuang@fjirsm.ac.cn; L. Guan; College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China; email: guanlh@fjirsm.ac.cn",,,,,,Royal Society of Chemistry,,,,,English,Sustain. Energy Fuels,Article,Scopus,,2-s2.0-85164319309,,China,fjirsm.ac.cn,,,"Sun, F.; Liu, T.; Huang, M.; Guan, L."
"Elumeeva, K., Ren, J.W., Antonietti, M., Fellinger, T.P.",High Surface Iron/Cobalt-Containing Nitrogen-Doped Carbon Aerogels as Non-Precious Advanced Electrocatalysts for Oxygen Reduction,2015,CHEMELECTROCHEM,2,4,,584,591,8,67,10.1002/celc.201402364,,"[Elumeeva, Karina; Ren, Jiawen; Antonietti, Markus; Fellinger, Tim-Patrick] Max Planck Inst Colloids & Interfaces, D-14476 Potsdam, Germany",,"Nitrogen-doped carbon-based catalysts are promising candidates to substitute expensive and moderately durable platinum-based catalysts for polymer electrolyte membrane fuel cells (PEMFCs). Condensation of ionic liquids (ILs) in salt melts enables the formation of hierarchically porous nitrogen-doped carbons with very high surface areas. Here we present synthesis and the employment of high-nitrogen-doped carbon aerogels modified with iron and cobalt for the oxygen reduction reaction (ORR), the relevant half-cell reaction for all fuel cells, using rotating disk/ring-disk electrode measurements. We show favorable performances compared to the current Pt/C standard. TEM analysis of the iron composites gave an amorphous, quasi-atomic distribution of the metal, while iron/cobalt composites form very small, well-supported nanoparticles.",aerogels; electrocatalysis; ionic liquids; oxygen reduction reaction; salt templating,ONE-POT SYNTHESIS; PEM FUEL-CELLS; FE/N/C-CATALYSTS; IONIC LIQUIDS; ACTIVE-SITES; GRAPHENE; PERFORMANCE; PRECURSORS; FE; CHALLENGES,aerogels;electrocatalysis;ionic liquids;oxygen reduction reaction;salt templating;ONE-POT SYNTHESIS;PEM FUEL-CELLS;FE/N/C-CATALYSTS;ACTIVE-SITES;GRAPHENE;PERFORMANCE;PRECURSORS;FE;CHALLENGES,Tim.Fellinger@mpikg.mpg.de,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,2196-0216,,,,English,CHEMELECTROCHEM,Article,WoS,Electrochemistry,WOS:000353063900015,,Germany,mpikg.mpg.de,Max Planck Inst Colloids & Interfaces,"Max Planck Inst Colloids & Interfaces, Germany","Elumeeva, Karina; Ren, Jiawen; Antonietti, Markus; Fellinger, Tim-Patrick"
"Jin, H.H., Jiang, N.N., Chen, Y.J., Feng, Z.J., Cheng, H.Y., Guan, L.H.",High-yield synthesis of FeNC as support of PtFe nanoparticles for the oxygen reduction reaction by a green ball milling method,2025,NANOTECHNOLOGY,36,15,155402,,,8,0,10.1088/1361-6528/adb8c2,,"[Jin, Huihui; Jiang, Nannan; Chen, Yujia; Feng, Zhijie; Cheng, Haoying; Guan, Lunhui] Chinese Acad Sci, Fujian Inst Res Struct Matter, CAS Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Fujian, Peoples R China; [Jin, Huihui; Chen, Yujia; Guan, Lunhui] Fuzhou Univ, Coll Chem, Fuzhou 350108, Peoples R China; [Jin, Huihui; Jiang, Nannan; Chen, Yujia; Feng, Zhijie; Cheng, Haoying; Guan, Lunhui] Univ Chinese Acad Sci, Fujian Coll, Fuzhou 350002, Fujian, Peoples R China",,"Enhancing catalytic activity, durability and reducing costs are major challenges in commercialization of proton exchange membrane fuel cells (PEMFCs). Non-precious metal catalysts face durability challenges when applied to PEMFCs, while platinum (Pt)-based catalysts are hampered by their high costs and weak interactions with carbon supports, limiting their application in PEMFCs. Combining Pt-based catalysts with iron-nitrogen-carbon (FeNC) supports can improve the oxygen reduction reaction performance. However, traditional preparation methods for FeNC supports, such as liquid-phase and hydrothermal synthesis, are cumbersome and have low yield. Here, we introduce a simple ball-milling method to synthesize FeNC with high yield that achieves a high-surface-area and uniform dispersion of Fe atoms. The FeNC support anchors PtFe nanoparticles at FeNx sites. This enhances support-alloy interactions and suppresses particle aggregation. The obtained catalyst denoted as PtFe/B-FeNC exhibits an exceptional mass activity of 2.57 A mgPt-1 at 0.9 V, representing a 12.2-fold increase compared to the commercial Pt/C. There is only 30 mV degradation for the catalyst after 120 k cycles, indicating outstanding stability. This research paves the way for the green synthesis of PtFe/B-FeNC with high yield, facilitating the development of commercial materials for other electrochemical devices.",ball milling; FeNC; oxygen reduction reaction; PtFe alloy,,ball milling;FeNC;oxygen reduction reaction;PtFe alloy,guanlh@fjirsm.ac.cn,,"TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND",,,,IOP Publishing Ltd,0957-4484,,,39981651,English,NANOTECHNOLOGY,Article,WoS,Science & Technology - Other Topics; Materials Science; Physics,WOS:001436882400001,2-s2.0-86000347326,China,fjirsm.ac.cn,Chinese Acad Sci;Fuzhou Univ;Univ Chinese Acad Sci,"Chinese Acad Sci, China;Fuzhou Univ, China;Univ Chinese Acad Sci, China","Jin, Huihui; Jiang, Nannan; Chen, Yujia; Feng, Zhijie; Cheng, Haoying; Guan, Lunhui"
"Fruhwirt, P., Kregar, A., Torring, J.T., Katrasnik, T., Gescheidt, G.",Holistic approach to chemical degradation of Nafion membranes in fuel cells: Modelling and predictions,2020,Physical Chemistry Chemical Physics,22,10,,5647,5666,,78,10.1039/c9cp04986j,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85081720658&doi=10.1039%2Fc9cp04986j&partnerID=40&md5=396c8bb9bc93d42eb2c7a6abddcb09e4,"Institute of Physical and Theoretical Chemistry, Technische Universitat Graz, Graz, Styria, Austria; Univerza v Ljubljani, Ljubljana, Slovenia","Frühwirt, Philipp, Institute of Physical and Theoretical Chemistry, Technische Universitat Graz, Graz, Styria, Austria; Kregar, Ambroz, Institute of Physical and Theoretical Chemistry, Technische Universitat Graz, Graz, Styria, Austria, Univerza v Ljubljani, Ljubljana, Slovenia; Törring, Jens T., Institute of Physical and Theoretical Chemistry, Technische Universitat Graz, Graz, Styria, Austria; Katrašnik, Tomaž, Univerza v Ljubljani, Ljubljana, Slovenia; Gescheidt, Georg, Institute of Physical and Theoretical Chemistry, Technische Universitat Graz, Graz, Styria, Austria","The state of health of polyfluorinated sulfonic-acid ionomer membranes (e.g. Nafion®) in low-temperature proton exchange membrane fuel cells (LT-PEMFCs) is negatively influenced by degradation phenomena occurring during their operation. As a consequence, the performance and durability of the membrane are decreased. In this article, we focus on simulating and predicting chemical membrane degradation phenomena using a holistic zero-dimensional kinetic framework. The knowledge of chemical degradation mechanisms is widely spread. We have collected and evaluated an extensive set of chemical mechanisms to achieve a holistic approach. This yields a set of 23 coupled chemical equations, which provide the whole cause and effect chain of chemical degradation in LT-PEMFCs (based on the Fenton reaction between Fe2+ and H<inf>2</inf>O<inf>2</inf>via the attack of hydroxyl radicals on the membrane, loss of ionomer moieties and emission of fluoride). Our kinetic framework allows the reproduction of experimentally accessible data such as fluoride emission rates and concentrations of ionomer moieties (from both in situ and ex situ tests). We present an approach, which allows estimations of the membrane lifetime based on fluoride emission rates. In addition, we outline the demetallation of Fe-N-C catalysts as a source of additional harmful iron species, which accelerate chemical membrane degradation. To demonstrate the expandability and versatility of the kinetic framework, a set of five chemical equations describing the radical scavenging properties of cerium agents is coupled to the main framework and its influence on membrane degradation is analysed. An automated solving routine for the system of coupled chemical equations on the basis of the chemical kinetic simulation tool COPASI has been developed and is freely accessible online (http://ptc-pc-139.tugraz.at/cgi-bin/Membrane_Degradation/). © 2020 the Owner Societies.",,Cell proliferation; Chemical attack; Degradation; Fluorine compounds; Ionomers; Iron compounds; Kinetics; Membranes; Oxidation; Temperature; Chemical degradation; Chemical equations; Chemical kinetic simulation; Chemical mechanism; Fluoride emissions; Membrane degradation; Modelling and predictions; Radical scavenging properties; Proton exchange membrane fuel cells (PEMFC),Cell proliferation;Chemical attack;Degradation;Fluorine compounds;Ionomers;Iron compounds;Kinetics;Membranes;Oxidation;Temperature;Chemical degradation;Chemical equations;Chemical kinetic simulation;Chemical mechanism;Fluoride emissions;Membrane degradation;Modelling and predictions;Radical scavenging properties;Proton exchange membrane fuel cells (PEMFC),"G. Gescheidt; Institute of Physical and Theoretical Chemistry, Graz University of Technology, Graz, Stremayrgasse 9, 8010, Austria; email: g.gescheidt-demner@tugraz.at",,,,,,Royal Society of Chemistry,14639076,,PPCPF,32101187,English,Phys. Chem. Chem. Phys.,Article,Scopus,,2-s2.0-85081720658,,Austria;Slovenia,tugraz.at,,,"Fruhwirt, P.; Kregar, A.; Torring, J.T.; Katrasnik, T.; Gescheidt, G."
"Fan, Z.W., Cui, X.J., Wei, J.K., Chen, C., Tang, H.L., Li, J.S.",Host-guest interactions promoted formation of Fe-N4 active site toward efficient oxygen reduction reaction catalysis,2022,JOURNAL OF COLLOID AND INTERFACE SCIENCE,621,,,195,204,10,11,10.1016/j.jcis.2022.04.059,,"[Fan, Zhengwen; Cui, Xinjiao; Wei, Jiankun; Chen, Chan; Li, Junsheng] Wuhan Univ Technol, Sch Chem Chem Engn & Life Sci, Wuhan 430070, Peoples R China; [Tang, Haolin; Li, Junsheng] Foshan Xianhu Lab Adv Energy Sci Technol, Guangdong Lab, Xianhu hydrogen Valley, Foshan 528200, Peoples R China; [Wei, Jiankun] Wuhan Univ Technol, Res Ctr Mat Genome Engn, Wuhan 430070, Peoples R China",,"Fe-N-C is the most promising material to replace the noble metal catalyst for cathodic oxygen reduction reaction in proton exchange membrane fuel cells (PEMFCs). However, the practical performance of Fe-N-C catalyst is significantly limited by its low active site (Fe-N-4) density. Herein, we propose to promote the formation of Fe-N-4 active sites in Fe-N-C catalyst by strengthening the interaction of N precursors and Fe precursors during the carbonization synthesis. In our approach, ionic liquid (IL, [EMIM] [NTf2]) with high nitrogen content and good thermal stability is caged in the pores of Fe-ZIF-8 through the host-guest interactions. These interactions are critical for the preservation of Fe and N species and formation of active sites during the synthesis. The optimal catalyst developed with this approach (Fe-0.05-N-C/10) has a high density of accessible Fe-N4 sites (1.88*1019 sites g(-1)). Therefore, in both acidic and alkaline media, Fe-0.05-N-C/10 showed excellent ORR activity comparable to commercial Pt/C catalyst. Moreover, PEMFC performance with a peak power density of 300 mW cm(-2) was demonstrated with Fe-0.05-N-C/10 under H-2/O-2 conditions. The synthetic approach reported herein may be used for tailoring of advanced catalyst with high intrinsic activity. (c) 2022 Elsevier Inc. All rights reserved.",Oxygen reduction; Proton exchange membrane fuel cell; Non-noble metal catalyst; Active site,FE-N-C; MESOPOROUS CARBON; IRON; ELECTROCATALYSTS,Oxygen reduction;Proton exchange membrane fuel cell;Non-noble metal catalyst;Active site;FE-N-C;MESOPOROUS CARBON;IRON;ELECTROCATALYSTS,291691@whut.edu.cn; 304805@whut.edu.cn; 247388@whut.edu.cn; 584537923@qq.com; li_j@whut.edu.cn,,"525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA",,,,ACADEMIC PRESS INC ELSEVIER SCIENCE,0021-9797,,,35461134,English,J COLLOID INTERF SCI,Article,WoS,Chemistry,WOS:000798845800008,,China,whut.edu.cn,Wuhan Univ Technol;Foshan Xianhu Lab Adv Energy Sci Technol,"Wuhan Univ Technol, China;Foshan Xianhu Lab Adv Energy Sci Technol, China","Fan, Zhengwen; Cui, Xinjiao; Wei, Jiankun; Chen, Chan; Tang, Haolin; Li, Junsheng"
"Chang, Y.F., Qin, Y.Z., Yin, Y., Zhang, J.F., Li, X.G.",Humidification strategy for polymer electrolyte membrane fuel cells - A review,2018,APPLIED ENERGY,230,,,643,662,20,198,10.1016/j.apenergy.2018.08.125,,"[Chang, Yafei; Qin, Yanzhou; Yin, Yan; Zhang, Junfeng; Li, Xianguo] Tianjin Univ, State Key Lab Engines, 135 Yaguan Rd, Tianjin 300350, Peoples R China; [Li, Xianguo] Univ Waterloo, Dept Mech & Mechatron Engn, Waterloo, ON, Canada",,"Polymer electrolyte membrane fuel cells are promising power sources because of their advantage such as high efficiency, zero emission and low operating temperature. Water management is one of the critical issues for polymer electrolyte membrane fuel cells and has received significant attention. The membrane within the fuel cell needs to stay in hydrated state to have high ion conductivity and durability, which requires proper humidification. Both internal and external methods have been utilized to humidify the polymer electrolyte membrane. Numerous studies on fuel cell humidification have been conducted in the past decades, especially in recent years. This review aims to summarize the main humidification methods and the related studies. The internal humidification methods are classified as physical methods and chemical methods. The external humidification methods include gas bubbling humidification, direct water injection, enthalpy wheel humidification, membrane humidifiers, and exhaust gas recirculation. The working principle and performance of each method are introduced and the advantage and drawback are summarized. Further, the humidification methods for alkaline anion exchange membrane fuel cells are also briefly reviewed, because of more recent studies showing their potential of using non-precious metal catalysts. This review can help to choose proper humidification strategy for specific polymer electrolyte membrane fuel cell application and may inspire further investigations.",Polymer electrolyte membrane fuel cell; Humidification; Water management; External; Internal,HUMIDIFYING COMPOSITE MEMBRANE; POLY(ETHER ETHER KETONE); DIFFUSION BACKING LAYER; WATER INJECTION METHOD; ANODE CATALYST LAYER; EXTERNAL HUMIDIFICATION; SELF-HUMIDIFICATION; ENTHALPY EXCHANGER; MASS-TRANSFER; FLOW-FIELD,Polymer electrolyte membrane fuel cell;Humidification;Water management;External;Internal;HUMIDIFYING COMPOSITE MEMBRANE;POLY(ETHER ETHER KETONE);DIFFUSION BACKING LAYER;WATER INJECTION METHOD;ANODE CATALYST LAYER;EXTERNAL HUMIDIFICATION;SELF-HUMIDIFICATION;ENTHALPY EXCHANGER;MASS-TRANSFER;FLOW-FIELD,yanyin@tju.edu.cn; x6li@uwaterloo.ca,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND",,,,ELSEVIER SCI LTD,0306-2619,,,,English,APPL ENERG,Review,WoS,Energy & Fuels; Engineering,WOS:000448226600048,2-s2.0-85052873699,China;Canada,tju.edu.cn,Tianjin Univ;Univ Waterloo,"Tianjin Univ, China;Univ Waterloo, Canada","Chang, Yafei; Qin, Yanzhou; Yin, Yan; Zhang, Junfeng; Li, Xianguo"
"Liu, J.Y., Wan, X., Liu, S.Y., Liu, X.F., Zheng, L.R., Yu, R.H., Shui, J.L.","Hydrogen Passivation of M-N-C (M = Fe, Co) Catalysts for Storage Stability and ORR Activity Improvements",2021,ADVANCED MATERIALS,33,38,2103600,,,6,171,10.1002/adma.202103600,,"[Liu, Jieyuan; Wan, Xin; Liu, Shiyuan; Liu, Xiaofang; Yu, Ronghai; Shui, Jianglan] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China; [Zheng, Lirong] Chinese Acad Sci, Beijing Synchrotron Radiat Facil, Inst High Energy Phys, Beijing 100049, Peoples R China",,"M-N-C (M = Fe, Co) are highly active nonprecious metal electrocatalysts for the oxygen reduction reaction (ORR) and other applications. Although their operation stability has been extensively studied in proton-exchange-membrane fuel cells, the storage stability that determines the performance maintenance before use has not yet been understood. Here, it is found that long-term exposure of M-N-C catalysts in air would cause surface oxidation and hydroxylation, resulting in significant decrease of ORR activity and fuel-cell performances. Hydrogen passivation is demonstrated to be an effective strategy to protect the atomic M-N-4 active sites and improve the storage stability of the catalysts. In addition, the hydrogen-termination can also reduce the ORR energy barrier and increase the utilization of active sites, leading to the improvements of fuel-cell activity and power density. Notably, these findings help to understand the storage-associated degradation and protection of M-N-C catalysts.",fuel cells; hydrogenation; metal-nitrogen-carbon; nonprecious metal catalysts; oxygen reduction reaction; storage stability,SINGLE-ATOM CATALYSTS; OXYGEN REDUCTION REACTION; ELECTROCATALYST; NANOPARTICLES; SITES,fuel cells;hydrogenation;metal-nitrogen-carbon;nonprecious metal catalysts;oxygen reduction reaction;storage stability;SINGLE-ATOM CATALYSTS;ELECTROCATALYST;NANOPARTICLES;SITES,shuijianglan@buaa.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,0935-9648,,,34365694,English,ADV MATER,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000682720200001,2-s2.0-85112597668,China,buaa.edu.cn,Beihang Univ;Chinese Acad Sci,"Beihang Univ, China;Chinese Acad Sci, China","Liu, Jieyuan; Wan, Xin; Liu, Shiyuan; Liu, Xiaofang; Zheng, Lirong; Yu, Ronghai; Shui, Jianglan"
"Zhang, Y., Gong, B., Zhou, B., Liu, Z., Xu, N., Wang, Y., Xu, X., Cao, Q., Kolokolov, D.I., Huang, H., Lou, S., Liu, G., Yang, W., Qiao, J.",Hydrophobicity engineering of hierarchically ordered SiO2/Fe-N-C catalyst with optimized triple-phase boundary for boosting oxygen reduction reaction,2025,Nano Research Energy,4,3,e9120180,,,,2,10.26599/NRE.2025.9120180,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105014162582&doi=10.26599%2FNRE.2025.9120180&partnerID=40&md5=0f42d05eeee67d71a4ba22d9c93a8f26,"State Key Laboratory of Advanced Fiber Materials, Donghua University, Shanghai, Shanghai, China; Tongji University, Shanghai, China; School of Chemical Engineering and Technology, Xinjiang University, Urumqi, Xinjiang, China; Boreskov Institute of Catalysis SB RAS, Novosibirsk, Novosibirsk Oblast, Russian Federation; Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, Hong Kong, Hong Kong; School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; North China Electric Power University, Beijing, China; Department of Physics, Dongguk University, Seoul, Seoul, South Korea","Zhang, Yang, State Key Laboratory of Advanced Fiber Materials, Donghua University, Shanghai, Shanghai, China; Gong, Bingbing, School of Chemical Engineering and Technology, Xinjiang University, Urumqi, Xinjiang, China; Zhou, Benji, State Key Laboratory of Advanced Fiber Materials, Donghua University, Shanghai, Shanghai, China; Liu, Zhibo, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Xu, Nengneng, State Key Laboratory of Advanced Fiber Materials, Donghua University, Shanghai, Shanghai, China; Wang, Yongxia, State Key Laboratory of Advanced Fiber Materials, Donghua University, Shanghai, Shanghai, China; Xu, Xiaoqian, State Key Laboratory of Advanced Fiber Materials, Donghua University, Shanghai, Shanghai, China; Cao, Qing, State Key Laboratory of Advanced Fiber Materials, Donghua University, Shanghai, Shanghai, China; Kolokolov, Daniil I., Boreskov Institute of Catalysis SB RAS, Novosibirsk, Novosibirsk Oblast, Russian Federation; Huang, Haitao, Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, Hong Kong, Hong Kong; Lou, Shuaifeng, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Liu, Guicheng, North China Electric Power University, Beijing, China; Yang, Woochul, Department of Physics, Dongguk University, Seoul, Seoul, South Korea; Qiao, Jinli, State Key Laboratory of Advanced Fiber Materials, Donghua University, Shanghai, Shanghai, China, Tongji University, Shanghai, China","The Fe single-atom catalyst (Fe-N-C) with Fe-N<inf>x</inf> active sites is considered a promising alternative to Pt-based catalysts for oxygen reduction reaction (ORR). However, the exposure and utilization efficiency of the Fe-N<inf>x</inf> site in Fe-N-C lead to a certain competitive distance with Pt-based catalysts in the ORR process. Herein, a space-confinement strategy triggered by SiO<inf>2</inf> templates to optimize the ORR triple-phase boundary of Fe-N-C, is reported. As expected, the optimized SiO<inf>2</inf>(4)/Fe-N-C exhibits excellent ORR activity with a half-wave potential of 0.886 V in 0.1 M KOH. More importantly, the E<inf>1/2</inf> loss of SiO<inf>2</inf>(4)/Fe-N-C is merely 32 mV after 30,000 cycles. Density functional theory (DFT) calculations confirm SiO<inf>2</inf>induced carbon defects critically modulate electronic configurations of FeN<inf>4</inf> centers, optimizing adsorption energetics of oxygen intermediates. Remarkably, when utilized as air cathodes for zinc-air batteries (ZABs), the device based on SiO<inf>2</inf>(4)/Fe-N-C displays record-breaking power density (444.10 mW·cm–2) with superior long-term durability over 1013 h, outperforming most reported noble-metal-free electrocatalysts. This work provides a new route to optimize the triple-phase boundary of single-atom catalysts for energy storage applications. © The Author(s) 2025.",a space-confinement strategy; Fe-Nx site; oxygen reduction reaction (ORR); proton exchange membrane fuel cells; zinc-air batteries,Atoms; Binary alloys; Catalyst activity; Density functional theory; Display devices; Durability; Electric batteries; Electrocatalysts; Electrolytic reduction; Iron; Iron compounds; Oxygen; Oxygen reduction reaction; Platinum compounds; Zinc; A space-confinement strategy; Fe-Nx site; Proton-exchange membranes fuel cells; Single-atoms; SiO 2; Space confinement; Zinc-air battery; ]+ catalyst; Potassium hydroxide,a space-confinement strategy;Fe-Nx site;oxygen reduction reaction (ORR);proton exchange membrane fuel cells;zinc-air batteries;Atoms;Binary alloys;Catalyst activity;Density functional theory;Display devices;Durability;Electric batteries;Electrocatalysts;Electrolytic reduction;Iron;Iron compounds;Oxygen;Oxygen reduction reaction;Platinum compounds;Zinc;Proton-exchange membranes fuel cells;Single-atoms;SiO 2;Space confinement;Zinc-air battery;]+ catalyst;Potassium hydroxide,"J. Qiao; State Key Laboratory of Advanced Fiber Materials, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China; email: qiaojl@dhu.edu.cn",,,,,,Tsinghua University Press,27910091,,,,English,Nano. Res. Energy.,Article,Scopus,,2-s2.0-105014162582,,China;Russian Federation;Hong Kong;South Korea,dhu.edu.cn,,,"Zhang, Y.; Gong, B.; Zhou, B.; Liu, Z.; Xu, N.; Wang, Y.; Xu, X.; Cao, Q.; Kolokolov, D.I.; Huang, H.; Lou, S.; Liu, G.; Yang, W.; Qiao, J."
"Nematollahi, P., Barbiellini, B., Bansil, A., Lamoen, D., Qingying, J., Mukerjee, S., Neyts, E.C.",Identification of a Robust and Durable FeN4CxCatalyst for ORR in PEM Fuel Cells and the Role of the Fifth Ligand,2022,ACS Catalysis,12,13,,7541,7549,,51,10.1021/acscatal.2c01294,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85134881064&doi=10.1021%2Facscatal.2c01294&partnerID=40&md5=d3ab74b22c675e6fb024b011fe2867a8,"Department of Chemistry, Universiteit Antwerpen, Antwerpen, VAN, Belgium; Department of Physics, LUT University, Lappeenranta, South Karelia, Finland; Northeastern University, Boston, MA, United States; Department of Physics, Universiteit Antwerpen, Antwerpen, VAN, Belgium; Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA, United States","Nematollahi, Parisa, Department of Chemistry, Universiteit Antwerpen, Antwerpen, VAN, Belgium; Barbiellini, Bernardo, Department of Physics, LUT University, Lappeenranta, South Karelia, Finland, Northeastern University, Boston, MA, United States; Bansil, Arun, Northeastern University, Boston, MA, United States; Lamoen, Dirk, Department of Physics, Universiteit Antwerpen, Antwerpen, VAN, Belgium; Qingying, Jia, Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA, United States; Mukerjee, Sanjeev, Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA, United States; Neyts, Erik Cornelis, Department of Chemistry, Universiteit Antwerpen, Antwerpen, VAN, Belgium","Although recent studies have advanced the understanding of pyrolyzed Fe-N-C materials as oxygen reduction reaction (ORR) catalysts, the atomic and electronic structures of the active sites and their detailed reaction mechanisms still remain unknown. Here, based on first-principles density functional theory (DFT) computations, we discuss the electronic structures of three FeN<inf>4</inf>catalytic centers with different local topologies of the surrounding C atoms with a focus on unraveling the mechanism of their ORR activity in acidic electrolytes. Our study brings back a forgotten, synthesized pyridinic Fe-N coordinate to the community's attention, demonstrating that this catalyst can exhibit excellent activity for promoting direct four-electron ORR through the addition of a fifth ligand such as -NH<inf>2</inf>, -OH, and -SO<inf>4</inf>. We also identify sites with good stability properties through the combined use of our DFT calculations and Mössbauer spectroscopy data. © 2022 American Chemical Society. All rights reserved.",density functional theory; Fe-N-C; FeN4; fuel cell; functional ligand; Mössbauer spectroscopy; non-PGM catalysts; oxygen reduction,Calculations; Catalyst activity; Electrolytic reduction; Electronic structure; Iron compounds; Ligands; Oxygen; Proton exchange membrane fuel cells (PEMFC); Stability; Active site; Density-functional-theory; Electronic.structure; Fe-N-C; Functional ligands; Non-PGM catalysts; Oxygen Reduction; Oxygen reduction reaction; PEM fuel cell; ]+ catalyst; Density functional theory,density functional theory;Fe-N-C;FeN4;fuel cell;functional ligand;Mössbauer spectroscopy;non-PGM catalysts;oxygen reduction;Calculations;Catalyst activity;Electrolytic reduction;Electronic structure;Iron compounds;Ligands;Oxygen;Proton exchange membrane fuel cells (PEMFC);Stability;Active site;Density-functional-theory;Electronic.structure;Functional ligands;Oxygen reduction reaction;PEM fuel cell;]+ catalyst,"P. Nematollahi; Research Group PLASMANT, NANO Lab Center of Excellence, Department of Chemistry, University of Antwerp, Antwerp, Universiteitsplein 1, Wilrijk, B-2610, Belgium; email: parisa.nematollahi@uantwerpen.be",,,,,,American Chemical Society,21555435,,ACCAC,,English,ACS Catal.,Article,Scopus,,2-s2.0-85134881064,,Belgium;Finland;United States,uantwerpen.be,,,"Nematollahi, P.; Barbiellini, B.; Bansil, A.; Lamoen, D.; Qingying, J.; Mukerjee, S.; Neyts, E.C."
"Nematollahi, P., Neyts, E.C.",Identification of a Unique Pyridinic FeN4CX Electrocatalyst for N2 Reduction: Tailoring the Coordination and Carbon Topologies,2022,JOURNAL OF PHYSICAL CHEMISTRY C,126,34,,14460,14469,10,4,10.1021/acs.jpcc.2c03577,,"[Nematollahi, Parisa; Neyts, Erik C.] Univ Antwerp, Dept Chem, Res Grp Plasmant, NANOlab Ctr Excellence, B-2610 Antwerp, Belgium",,"Although the heterogeneity of pyrolyzed Fe???N???C materials is known and has been reported previously, the atomic structure of the active sites and their detailed reaction mechanisms are still unknown. Here, we identified two pyridinic Fe???N4-like centers with different local C coordinates, i.e., FeN4C8 and FeN4C10, and studied their electrocatalytic activity for the nitrogen reduction reaction (NRR) based on density functional theory (DFT) calculations. We also discovered the influence of the adsorption of NH2 as a functional ligand on catalyst performance on the NRR. We confirmed that the NRR selectivity of the studied catalysts is essentially governed either by the local C coordination or by the dynamic structure associated with the FeII/FeIII. Our investigations indicate that the proposed traditional pyridinic FeN4C10 has higher catalytic activity and selectivity for the NRR than the robust FeN4C8 catalyst, while it may have outstanding activity for promoting other (electro)catalytic reactions. <comment>Superscript/Subscript Available</comment",,DENSITY-FUNCTIONAL THEORY; PEM FUEL-CELLS; GENERALIZED GRADIENT APPROXIMATION; NITROGEN-DOPED CARBON; IRON-BASED CATALYSTS; OXYGEN REDUCTION; ACTIVE-SITES; ELECTROCHEMICAL REDUCTION; ELECTRONIC-STRUCTURE; AMBIENT CONDITIONS,DENSITY-FUNCTIONAL THEORY;PEM FUEL-CELLS;GENERALIZED GRADIENT APPROXIMATION;NITROGEN-DOPED CARBON;IRON-BASED CATALYSTS;OXYGEN REDUCTION;ACTIVE-SITES;ELECTROCHEMICAL REDUCTION;ELECTRONIC-STRUCTURE;AMBIENT CONDITIONS,parisa.nematollahi@uantwerpen.be,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1932-7447,,,,English,J PHYS CHEM C,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science,WOS:000844346000001,,Belgium,uantwerpen.be,Univ Antwerp,"Univ Antwerp, Belgium","Nematollahi, Parisa; Neyts, Erik C."
"Shah, S.S.A., Najam, T., Bashir, M.S., Javed, M.S., Rahman, A.U., Luque, R., Bao, S.J.",Identification of Catalytic Active Sites for Durable Proton Exchange Membrane Fuel Cell: Catalytic Degradation and Poisoning Perspectives,2022,SMALL,18,18,2106279,,,33,50,10.1002/smll.202106279,,"[Shah, Syed Shoaib Ahmad; Bao, Shu-Juan] Southwest Univ, Sch Mat & Energy, Minist Educ, Key Lab Luminescence Anal & Mol Sensing, Chongqing 400715, Peoples R China; [Najam, Tayyaba] Shenzhen Univ, Coll Chem & Environm Engn, Shenzhen 518060, Peoples R China; [Bashir, Muhammad Sohail] Univ Sci & Technol China, Dept Polymer Sci & Engn, CAS Key Lab Soft Matter Chem, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China; [Javed, Muhammad Sufyan] Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China; [Rahman, Aziz-ur] Islamia Univ Bahawalpur, Inst Chem, Bahawalpur 63100, Pakistan; [Luque, Rafael] Univ Cordoba, Dept Quim Organ, Edificio Marie Curie C-3,Campus Rabanales, E-14014 Cordoba, Spain; [Luque, Rafael] Peoples Friendship Univ Russia, RUDN Univ, 6 Miklukho Maklaya Str, Moscow 117198, Russia",,"Recent progress in synthetic strategies, analysis techniques, and computational modeling assist researchers to develop more active catalysts including metallic clusters to single-atom active sites (SACs). Metal coordinated N-doped carbons (M-N-C) are the most auspicious, with a large number of atomic sites, markedly performing for a series of electrochemical reactions. This perspective sums up the latest innovative and computational comprehension, while giving credit to earlier/pioneering work in carbonaceous assembly materials towards robust electrocatalytic activity for proton exchange membrane fuel cells via inclusive performance assessment of the oxygen reduction reaction (ORR). M-N-x-C-y are exclusively defined active sites for ORR, so there is a unique possibility to intellectually design the relatively new catalysts with much improved activity, selectivity, and durability. Moreover, some SACs structures provide better performance in fuel cells testing with long-term durability. The efforts to understand the connection in SACs based M-N-x-C-y moieties and how these relate to catalytic ORR performance are also conveyed. Owing to comprehensive practical application in the field, this study has covered very encouraging aspects to the current durability status of M-N-C based catalysts for fuel cells followed by degradation mechanisms such as macro-, microdegradation, catalytic poisoning, and future challenges.",catalytic poisoning; durability; electrocatalysts; fuel cells; metal organic frameworks (MOFs); oxygen reduction reaction (ORR); single-atom active sites (SACs),OXYGEN REDUCTION REACTION; N-C CATALYSTS; NITROGEN-DOPED CARBON; DENSITY-FUNCTIONAL THEORY; METAL-ORGANIC FRAMEWORKS; SINGLE-ATOM CATALYSTS; PEROVSKITE CATHODE MATERIAL; FE-BASED CATALYSTS; FE/N/C-CATALYSTS; POROUS CARBON,catalytic poisoning;durability;electrocatalysts;fuel cells;metal organic frameworks (MOFs);oxygen reduction reaction (ORR);single-atom active sites (SACs);OXYGEN REDUCTION REACTION;N-C CATALYSTS;NITROGEN-DOPED CARBON;DENSITY-FUNCTIONAL THEORY;METAL-ORGANIC FRAMEWORKS;SINGLE-ATOM CATALYSTS;PEROVSKITE CATHODE MATERIAL;FE-BASED CATALYSTS;FE/N/C-CATALYSTS;POROUS CARBON,tayyabanajam@outlook.com; q62alsor@uco.es; baoshj@swu.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1613-6810,,,35338585,English,SMALL,Review,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000773130100001,2-s2.0-85127273426,China;Pakistan;Spain;Russian Federation,outlook.com,Southwest Univ;Shenzhen Univ;Univ Sci & Technol China;Lanzhou Univ;Islamia Univ Bahawalpur;Univ Cordoba;Peoples Friendship Univ Russia,"Southwest Univ, China;Shenzhen Univ, China;Univ Sci & Technol China, China;Lanzhou Univ, China;Islamia Univ Bahawalpur, Pakistan;Univ Cordoba, Spain;Peoples Friendship Univ Russia, Russian Federation","Shah, Syed Shoaib Ahmad; Najam, Tayyaba; Bashir, Muhammad Sohail; Javed, Muhammad Sufyan; Rahman, Aziz-ur; Luque, Rafael; Bao, Shu-Juan"
"Chen, M.X., Zhu, M.Z., Zuo, M., Chu, S.Q., Zhang, J., Wu, Y., Liang, H.W., Feng, X.L.",Identification of Catalytic Sites for Oxygen Reduction in Metal/Nitrogen-Doped Carbons with Encapsulated Metal Nanoparticles,2020,ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,59,4,,1627,1633,7,236,10.1002/anie.201912275,,"[Chen, Ming-Xi; Zhu, Mengzhao; Zuo, Ming; Wu, Yuen; Liang, Hai-Wei] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Dept Chem, Hefei 230026, Anhui, Peoples R China; [Feng, Xinliang] Tech Univ Dresden, Fac Chem & Food Chem, D-01062 Dresden, Germany; [Feng, Xinliang] Tech Univ Dresden, Ctr Advancing Elect Dresden, D-01062 Dresden, Germany; [Chu, Sheng-Qi; Zhang, Jing] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China",,"The development of metal-N-C materials as efficient non-precious metal (NPM) catalysts for catalysing the oxygen reduction reaction (ORR) as alternatives to platinum is important for the practical use of proton exchange membrane fuel cells (PEMFCs). However, metal-N-C materials have high structural heterogeneity. As a result of their high-temperature synthesis they often consist of metal-N-x sites and graphene-encapsulated metal nanoparticles. Thus it is hard to identify the active structure of metal-N-C catalysts. Herein, we report a low-temperature NH4Cl-treatment to etch out graphene-encapsulated nanoparticles from metal-N-C catalysts without destruction of co-existing atomically dispersed metal-N-x sites. Catalytic activity is much enhanced by this selective removal of metallic nanoparticles. Accordingly, we can confirm the spectator role of graphene-encapsulated nanoparticles and the pivotal role of metal-N-x sites in the metal-N-C materials for ORR in the acidic medium.",active sites; encapsulated nanoparticles; Fe-N-C; fuel cells; oxygen reduction reaction (ORR),IRON NANOPARTICLES; ACTIVE-SITES; FUEL-CELLS; PERFORMANCE; ELECTROLYTE; ELECTROCATALYST; NANOTUBES,active sites;encapsulated nanoparticles;Fe-N-C;fuel cells;oxygen reduction reaction (ORR);IRON NANOPARTICLES;ACTIVE-SITES;FUEL-CELLS;PERFORMANCE;ELECTROLYTE;ELECTROCATALYST;NANOTUBES,hwliang@ustc.edu.cn; xinliang.feng@tu-dresden.de,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1433-7851,,,31674103,English,ANGEW CHEM INT EDIT,Article,WoS,Chemistry,WOS:000499268400001,2-s2.0-85076434350,China;Germany,ustc.edu.cn,Univ Sci & Technol China;Tech Univ Dresden;Chinese Acad Sci,"Univ Sci & Technol China, China;Tech Univ Dresden, Germany;Chinese Acad Sci, China","Chen, Ming-Xi; Zhu, Mengzhao; Zuo, Ming; Chu, Sheng-Qi; Zhang, Jing; Wu, Yuen; Liang, Hai-Wei; Feng, Xinliang"
"Li, J., Sougrati, M.T., Zitolo, A., Ablett, J.M., Oguz, I.C., Mineva, T., Matanovic, I., Atanassov, P., Huang, Y., Zenyuk, I., Di Cicco, A., Kumar, K., Dubau, L., Maillard, F., Drazic, G., Jaouen, F.",Identification of durable and non-durable FeN x sites in Fe–N–C materials for proton exchange membrane fuel cells,2021,Nature Catalysis,4,1,,10,19,,582,10.1038/s41929-020-00545-2,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097213212&doi=10.1038%2Fs41929-020-00545-2&partnerID=40&md5=c600acfb4fa5f06d7463b984b334d50c,"Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; SOLEIL Synchrotron, Gif-sur-Yvette, France; University of New Mexico School of Engineering, Albuquerque, NM, United States; Los Alamos National Laboratory Theoretical Division, Los Alamos, NM, United States; National Fuel Cell Research Center, Samueli School of Engineering, Irvine, CA, United States; School of Science and Technology, Università degli Studi di Camerino, Camerino, MC, Italy; Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Department of Materials Chemistry, National Institute of Chemistry Ljubljana, Ljubljana, Slovenia; School of Chemical Engineering and Technology, Tianjin University, Tianjin, China","Li, Jingkun, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China; Sougrati, Moulay T., Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Zitolo, Andrea, SOLEIL Synchrotron, Gif-sur-Yvette, France; Ablett, James M., SOLEIL Synchrotron, Gif-sur-Yvette, France; Oǧuz, Ismail Can, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Mineva, Tsonka, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Matanovic, Ivana, University of New Mexico School of Engineering, Albuquerque, NM, United States, Los Alamos National Laboratory Theoretical Division, Los Alamos, NM, United States; Atanassov, Plamen B., National Fuel Cell Research Center, Samueli School of Engineering, Irvine, CA, United States; Huang, Ying, National Fuel Cell Research Center, Samueli School of Engineering, Irvine, CA, United States; Zenyuk, Iryna V., National Fuel Cell Research Center, Samueli School of Engineering, Irvine, CA, United States; Di Cicco, Andrea D., School of Science and Technology, Università degli Studi di Camerino, Camerino, MC, Italy; Kumar, Kavita, Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Dubau, Laetitia, Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Maillard, Frédéric M., Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Dražic̈, Goran, Department of Materials Chemistry, National Institute of Chemistry Ljubljana, Ljubljana, Slovenia; Jaouen, Frédéric, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France","While Fe–N–C materials are a promising alternative to platinum for catalysing the oxygen reduction reaction in acidic polymer fuel cells, limited understanding of their operando degradation restricts rational approaches towards improved durability. Here we show that Fe–N–C catalysts initially comprising two distinct FeN<inf>x</inf> sites (S1 and S2) degrade via the transformation of S1 into iron oxides while the structure and number of S2 were unmodified. Structure–activity correlations drawn from end-of-test 57Fe Mössbauer spectroscopy reveal that both sites initially contribute to the oxygen reduction reaction activity but only S2 substantially contributes after 50 h of operation. From in situ 57Fe Mössbauer spectroscopy in inert gas coupled to calculations of the Mössbauer signature of FeN<inf>x</inf> moieties in different electronic states, we identify S1 to be a high-spin FeN<inf>4</inf>C<inf>12</inf> moiety and S2 a low- or intermediate-spin FeN<inf>4</inf>C<inf>10</inf> moiety. These insights lay the groundwork for rational approaches towards Fe–N–C cathodes with improved durability in acidic fuel cells. [Figure not available: see fulltext.] © 2020, The Author(s), under exclusive licence to Springer Nature Limited.",,Durability; Electrolytic reduction; Electronic states; Gas fuel purification; Inert gases; Iron oxides; Oxygen; Oxygen reduction reaction; Proton exchange membrane fuel cells (PEMFC); Sulfur compounds; Acidic polymers; High spins; Intermediate spins; Mossbauer; Operando; Oxygen Reduction; Ssbauer spectroscopies; Nitrogen compounds,Durability;Electrolytic reduction;Electronic states;Gas fuel purification;Inert gases;Iron oxides;Oxygen;Oxygen reduction reaction;Proton exchange membrane fuel cells (PEMFC);Sulfur compounds;Acidic polymers;High spins;Intermediate spins;Mossbauer;Operando;Oxygen Reduction;Ssbauer spectroscopies;Nitrogen compounds,"F. Jaouen; Institut Charles Gerhardt Montpellier, UMR 5253, CNRS, Université Montpellier, ENSCM, Place Eugène Bataillon, Montpellier, France; email: frederic.jaouen@umontpellier.fr",,,,,,Nature Research,,,,,English,Nat. Catal.,Article,Scopus,,2-s2.0-85097213212,,France;United States;Italy;Slovenia;China,umontpellier.fr,,,"Li, J.; Sougrati, M.T.; Zitolo, A.; Ablett, J.M.; Oguz, I.C.; Mineva, T.; Matanovic, I.; Atanassov, P.; Huang, Y.; Zenyuk, I.; Di Cicco, A.; Kumar, K.; Dubau, L.; Maillard, F.; Drazic, G.; Jaouen, F."
"Wang, Y., Huang, W., Wan, L.Y., Yang, J., Xie, R.J., Zheng, Y.P., Tan, Y.Z., Wang, Y.S., Zaghib, K., Zheng, L., Sun, S., Zhou, Z.Y., Sun, S.G.",Identification of the active triple-phase boundary of a non-Pt catalyst layer in fuel cells,2022,Science Advances,8,44,add8873,,,,83,10.1126/sciadv.add8873,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85141212664&doi=10.1126%2Fsciadv.add8873&partnerID=40&md5=c432f59241275faeae4740531536efaa,"College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China; Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen, Fujian, China; Center of Excellence in Transportation Electrification and Energy Storage, Hydro-Québec, Montreal, QC, Canada; Department of Mining and Materials Engineering, Université McGill, Montreal, QC, Canada; Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China; Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada","Wang, Yucheng, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen, Fujian, China; Huang, Wen, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China; Wan, Liyang, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China; Yang, Jian, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China; Xie, Rongjie, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China; Zheng, Yanping, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China; Tan, Yuanzhi, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China; Wang, Yuesheng, Center of Excellence in Transportation Electrification and Energy Storage, Hydro-Québec, Montreal, QC, Canada; Zaghib, Karim, Department of Mining and Materials Engineering, Université McGill, Montreal, QC, Canada; Zheng, Lirong, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China; Sun, Shuhui, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Zhou, Zhiyou, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen, Fujian, China; Sun, Shigang, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China","The rational design of non-Pt oxygen reduction reaction (ORR) catalysts and catalyst layers in fuel cells is largely impeded by insufficient knowledge of triple-phase boundaries (TPBs) in the micropore and mesopore ranges. Here, we developed a size-sensitive molecular probe method to resolve the TPB of Fe/N/C catalyst layers in these size ranges. More than 70% of the ORR activity was found to be contributed by the 0.8- to 2.0-nanometer micropores of Fe/N/C catalysts, even at a low micropore area fraction of 29%. Acid-alkaline interactions at the catalyst-polyelectrolyte interface deactivate the active sites in mesopores and macropores, resulting in inactive TPBs, leaving micropores without the interaction as the active TPBs. The concept of active and inactive TPBs provides a previously unidentified design principle for non-Pt catalyst and catalyst layers in fuel cells. © 2022 The Authors.",,Catalyst activity; Microporosity; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Catalysts layers; Cell-be; Cell/B.E; Cell/BE; Micropores; Oxygen reduction reaction; Pt catalysts; Rational design; Triple phase boundary; ]+ catalyst; Electrolytic reduction,Catalyst activity;Microporosity;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Catalysts layers;Cell-be;Cell/B.E;Cell/BE;Micropores;Oxygen reduction reaction;Pt catalysts;Rational design;Triple phase boundary;]+ catalyst;Electrolytic reduction,"Y.-C. Wang; State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China; email: wangyc@xmu.edu.cn; Z.-Y. Zhou; State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China; email: zhouzy@xmu.edu.cn; S.-H. Sun; Institut National de la Recherche Scientifique (INRS), Centre Energie Materiaux Telecommunications, Varennes, J3X 1P7, Canada; email: shuhui.sun@inrs.ca",,,,,,American Association for the Advancement of Science,,,,36322657,English,Sci. Adv.,Article,Scopus,,2-s2.0-85141212664,,China;Canada,xmu.edu.cn,,,"Wang, Y.; Huang, W.; Wan, L.-Y.; Yang, J.; Xie, R.-J.; Zheng, Y.-P.; Tan, Y.-Z.; Wang, Y.-S.; Zaghib, K.; Zheng, L.; Sun, S.; Zhou, Z.-Y.; Sun, S.-G."
"Liu, W., He, H., Liu, Q., Wan, X., Shui, J.",Identification of the optimal doping position of hetero-atoms in chalcogen-doped Fe–N–C catalysts for oxygen reduction reaction,2024,Particuology,89,,,99,108,,9,10.1016/j.partic.2023.11.004,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85178500963&doi=10.1016%2Fj.partic.2023.11.004&partnerID=40&md5=f17a1fdf8852f740d754509376b5b1a2,"Beihang University, Beijing, China; Beihang University, Beijing, China; Tianmushan Laboratory, Hangzhou, China","Liu, Weihao, Beihang University, Beijing, China; He, Huanhuan, Beihang University, Beijing, China; Liu, Qingtao, Beihang University, Beijing, China; Wan, Xin, Beihang University, Beijing, China, Beihang University, Beijing, China; Shui, Jianglan, Beihang University, Beijing, China, Tianmushan Laboratory, Hangzhou, China","The excellent oxygen reduction reaction (ORR) activity of Fe–N–C catalysts in acidic media makes them potential for low-cost proton exchange membrane fuel cells. In recent years, it has been shown that heteroatoms (B, O, S, P, Cl, F, etc.) can be used as electron-withdrawing groups to modulate the planar structure and electron distribution of the Fe–N<inf>x</inf> active sites to achieve simultaneous improvement of catalytic activity and stability. However, the optimal location of the heteroatoms remains unclear. Here, taking chalcogen heteroatoms (S and Se) as an example, we control the doping positions and investigate their effect on the ORR performance of the Fe–N–C catalysts. The first coordination shell of the iron single atom is identified as the optimal doping position. The optimized catalysts Fe–N<inf>3</inf>S<inf>1</inf>/NC and Fe–N<inf>3</inf>Se<inf>1</inf>/NC demonstrate improved activity and stability in both half cells and fuel cells. This work provides insights into the enhancement mechanism of heteroatom doping in single-atom catalysts. © 2023 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences",Doping position; Enhancement mechanism; Fe–N–C catalysts; Hetero-atom doping; Oxygen reduction reaction,Atoms; Catalyst activity; Cell engineering; Electrolytic reduction; Proton exchange membrane fuel cells (PEMFC); Chalcogens; Doping positions; Enhancement mechanism; Fe–N–C catalyst; Hetero-atom doping; Heteroatoms; Optimal doping; Oxygen reduction reaction; Single-atoms; ]+ catalyst; Oxygen,Doping position;Enhancement mechanism;Fe–N–C catalysts;Hetero-atom doping;Oxygen reduction reaction;Atoms;Catalyst activity;Cell engineering;Electrolytic reduction;Proton exchange membrane fuel cells (PEMFC);Chalcogens;Doping positions;Fe–N–C catalyst;Heteroatoms;Optimal doping;Single-atoms;]+ catalyst;Oxygen,"J. Shui; School of Materials Science and Engineering, Beihang University, Beijing, 100191, China; email: shuijianglan@buaa.edu.cn; X. Wan; School of Materials Science and Engineering, Beihang University, Beijing, 100191, China; email: wanxin@buaa.edu.cn",,,,,,Elsevier B.V.,16742001,,,,English,Particuology,Article,Scopus,,2-s2.0-85178500963,,China,buaa.edu.cn,,,"Liu, W.; He, H.; Liu, Q.; Wan, X.; Shui, J."
"Hu, Y., Jensen, J.O., Pan, C., Cleemann, L.N., Shypunov, I., Li, Q.F.",Immunity of the Fe-N-C catalysts to electrolyte adsorption: Phosphate but not perchloric anions,2018,APPLIED CATALYSIS B-ENVIRONMENTAL,234,,,357,364,8,68,10.1016/j.apcatb.2018.03.056,,"[Hu, Yang; Jensen, Jens Oluf; Pan, Chao; Cleemann, Lars Nilausen; Shypunov, Illia; Li, Qingfeng] Tech Univ Denmark, Dept Energy Convers & Storage, Elektrovej 375, DK-2800 Lyngby, Denmark",,"Non-precious metal catalysts (NPMCs), particularly the type based on carbon-supported FeNx functionalities (Fe-N-C) are a very promising material for replacing the rare and costly platinum-based catalysts in polymer electrolyte membrane fuel cells (PEMFCs). Evaluation of these materials is most often carried out, like for Pt-based catalysts, in dilute perchloric acid by assuming its non-adsorbing nature on the active sites. The assumption is however not true. In this work, a typical Fe-N-C catalyst was first synthesized by high-pressure pyrolysis in the presence of a carbon support and thoroughly characterized in terms of morphology, structure and active site distribution. The subsequent electrochemical characterization of the catalyst shows strong adsorption and poisoning effect of, in addition to the known Cl- ,perchloric anions on the oxygen reduction reaction (ORR) activity. On the contrary, phosphate anions exhibit negligible poisoning effect on the catalyst activity. At 0.8 V vs. RHE, the ORR activity of the catalyst is found to decrease in the order of H3PO4 (8.6 mA mg(-1)) > H2SO4 (5.3 mA mg(-1)) > HClO4 (3.1 mA mg(-1)) > HCl (0.7 mA mg(-1)). The results suggest potential applications of NPMC in high-temperature PEMFCs based on phosphoric acid doped polymer membranes, where high-loading platinum catalysts are currently used. As demonstrated in the low current density range of high-temperature PEMFCs, the catalyst shows a comparable performance to the Pt/C catalysts.",Oxygen reduction; Catalyst; Fuel cell; Anion; Poison,OXYGEN-REDUCTION REACTION; PEM FUEL-CELLS; SINGLE-CRYSTAL ELECTRODES; POLYMER ELECTROLYTE; ACID-SOLUTIONS; ELECTROCHEMICAL REDUCTION; PARTICLE-SIZE; DOUBLE-LAYER; PLATINUM; ELECTROCATALYSTS,Oxygen reduction;Catalyst;Fuel cell;Anion;Poison;OXYGEN-REDUCTION REACTION;PEM FUEL-CELLS;SINGLE-CRYSTAL ELECTRODES;POLYMER ELECTROLYTE;ACID-SOLUTIONS;ELECTROCHEMICAL REDUCTION;PARTICLE-SIZE;DOUBLE-LAYER;PLATINUM;ELECTROCATALYSTS,yanhu@dtu.dk; qfli@dtu.dk,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0926-3373,,,,English,APPL CATAL B-ENVIRON,Article,WoS,Chemistry; Engineering,WOS:000433650000036,2-s2.0-85046645205,Denmark,dtu.dk,Tech Univ Denmark,"Tech Univ Denmark, Denmark","Hu, Yang; Jensen, Jens Oluf; Pan, Chao; Cleemann, Lars Nilausen; Shypunov, Illia; Li, Qingfeng"
"Ku, Y.P., Kumar, K., Hutzler, A., Gotz, C., Vorochta, M., Sougrati, M.T., Lloret, V., Ehelebe, K., Mayrhofer, K.J.J., Thiele, S., Khalakhan, I., Bohm, T., Jaouen, F., Cherevko, S.",Impact of Carbon Corrosion and Denitrogenation on the Deactivation of Fe-N-C Catalysts in Alkaline Media,2024,ACS Catalysis,14,11,,8576,8591,,13,10.1021/acscatal.4c01219,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85193750841&doi=10.1021%2Facscatal.4c01219&partnerID=40&md5=1a6387f9d32076d06c07d1ba40925f4d,"Forschungszentrum Jülich GmbH, Julich, Germany; Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; Charles University, Prague, Czech Republic; Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France","Ku, Yuping, Forschungszentrum Jülich GmbH, Julich, Germany, Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; Kumar, Kavita, Forschungszentrum Jülich GmbH, Julich, Germany; Hutzler, Andreas, Forschungszentrum Jülich GmbH, Julich, Germany; Götz, Carina, Forschungszentrum Jülich GmbH, Julich, Germany, Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; Vorochta, Michael, Charles University, Prague, Czech Republic; Sougrati, Moulay T., Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Lloret, Vicent, Forschungszentrum Jülich GmbH, Julich, Germany; Ehelebe, Konrad, Forschungszentrum Jülich GmbH, Julich, Germany, Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; Mayrhofer, Karl J.J., Forschungszentrum Jülich GmbH, Julich, Germany, Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; Thiele, Simon, Forschungszentrum Jülich GmbH, Julich, Germany, Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; Khalakhan, Ivan, Charles University, Prague, Czech Republic; Böhm, Thomas, Forschungszentrum Jülich GmbH, Julich, Germany; Jaouen, Frédéric, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Cherevko, Serhiy, Forschungszentrum Jülich GmbH, Julich, Germany","Fe-N-C catalysts are considered an earth-abundant alternative to Pt in cathodes of anion exchange membrane fuel cells, although their stability still requires improvement for further commercialization. The degradation of Fe-N-C during both load cycles and start-stop events must be understood and mitigated to minimize system costs. Several approaches have recently been proposed to improve the durability of Fe active species during the oxygen reduction reaction in acidic media. On the other hand, knowledge of the degradation of Fe-N-C catalysts during start-stop events of anion exchange membrane fuel cells remains scarce. In this work, we use a gas diffusion electrode half-cell coupled with inductively coupled plasma mass spectrometry (GDE-ICP-MS) to quantify the Fe dissolution rates in the potential range between 0.93 and 1.5 V<inf>RHE</inf>. It is shown that Fe dissolution accelerates with increased anodic potential and temperature, while it is independent of the presence/absence of O<inf>2</inf>. The onset potential of Fe dissolution at room temperature agrees with the reported onset potentials of carbon corrosion and denitrogenation, C and N being oxidized to gaseous CO<inf>x</inf> and NO<inf>x</inf> species, respectively. This correlation supports that the electrochemical oxidation of the N-C matrix triggers the observed catalyst demetalation in these conditions. Using a set of ex situ physicochemical characterization techniques, including spectroscopy and microscopy, the various degrees of degradation under three sets of experimental conditions of interest (O<inf>2</inf>-RT, O<inf>2</inf>-HT, and Ar-HT, where RT = 22 °C and HT = 62 °C) are rationalized. Combining the GDE-ICP-MS technique and post-mortem analyses, this work provides detailed insights into the degradation pathways of various Fe, N, and C species during start-stop events, which may inspire the next generation of durable Fe-N-C catalysts for anion exchange membrane fuel cells. © 2024 The Authors. Published by American Chemical Society.",AEMFC; carbon corrosion; denitrogenation; Fe dissolution; Fe−N−C; oxygen reduction reaction,Alkaline fuel cells; Catalysts; Corrosion; Diffusion in gases; Dissolution; Electrochemical oxidation; Electrodes; Electrolytic reduction; Inductively coupled plasma mass spectrometry; Ions; Iron; Mass spectrometers; Oxygen; Proton exchange membrane fuel cells (PEMFC); AEMFC; Alkaline media; Anion-exchange membrane fuel cells; Carbon corrosion; Denitrogenation; Fe dissolution; Fe−N−C; Onset potential; Oxygen reduction reaction; ]+ catalyst; Carbon,AEMFC;carbon corrosion;denitrogenation;Fe dissolution;Fe−N−C;oxygen reduction reaction;Alkaline fuel cells;Catalysts;Corrosion;Diffusion in gases;Dissolution;Electrochemical oxidation;Electrodes;Electrolytic reduction;Inductively coupled plasma mass spectrometry;Ions;Iron;Mass spectrometers;Oxygen;Proton exchange membrane fuel cells (PEMFC);Alkaline media;Anion-exchange membrane fuel cells;Onset potential;]+ catalyst;Carbon,"Y.-P. Ku; Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Erlangen, Cauerstraße 1, 91058, Germany; email: y.ku@fz-juelich.de; F. Jaouen; Institut Charles Gerhardt Montpellier, Univ. Montpellier, CNRS, ENSCM, Montpellier, 1919 route de Mende, F-34293, France; email: frederic.jaouen@umontpellier.fr; S. Cherevko; Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Erlangen, Cauerstraße 1, 91058, Germany; email: s.cherevko@fz-juelich.de",,,,,,American Chemical Society,21555435,,ACCAC,,English,ACS Catal.,Article,Scopus,,2-s2.0-85193750841,,Germany;Czech Republic;France,fz-juelich.de,,,"Ku, Y.-P.; Kumar, K.; Hutzler, A.; Gotz, C.; Vorochta, M.; Sougrati, M.T.; Lloret, V.; Ehelebe, K.; Mayrhofer, K.J.J.; Thiele, S.; Khalakhan, I.; Bohm, T.; Jaouen, F.; Cherevko, S."
"Bevilacqua, N., Asset, T., Schmid, M.A., Markotter, H., Manke, I., Atanassov, P., Zeis, R.",Impact of catalyst layer morphology on the operation of high temperature PEM fuel cells,2021,JOURNAL OF POWER SOURCES ADVANCES,7,,100042,,,9,46,10.1016/j.powera.2020.100042,,"[Bevilacqua, N.; Schmid, M. A.; Zeis, R.] Karlsruhe Inst Technol KIT, Helmholtz Inst Ulm HIU, Helmholtzstr 11, D-89081 Ulm, Germany; [Asset, T.; Atanassov, P.] Univ Calif Irvine, Dept Chem & Biomol Engn, Natl Fuel Cell Res Ctr, Irvine, CA 92697 USA; [Markoetter, H.; Manke, I] Helmholtz Zentrwn Berlin Mat & Energie HZB, Hahn Meitner Pl 1, D-14109 Berlin, Germany; [Markoetter, H.] Bundesanstalt Mat Forsch & Prufung BAM, Unter Eichen 87, D-12205 Berlin, Germany",,"Electrochemical impedance spectroscopy (EIS) is a well-established method to analyze a polymer electrolyte membrane fuel cell (PEMFC). However, without further data processing, the impedance spectrum yields only qualitative insight into the mechanism and individual contribution of transport, kinetics, and ohmic losses to the overall fuel cell limitations. The distribution of relaxation times (DRT) method allows quantifying each of these polarization losses and evaluates their contribution to a given electrocatalyst's depreciated performances. We coupled this method with a detailed morphology study to investigate the impact of the 3D-structure on the processes occurring inside a high-temperature polymer electrolyte membrane fuel cell (HT-PEMFC). We tested a platinum catalyst (PVC), a platinum-cobalt alloy catalyst (Pt3Co/C), and a platinum group metal-free iron-nitrogen-carbon (Fe-N-C) catalyst. We found that the hampered mass transport in the latter is mainly responsible for its low performance in the MEA (along with its decreased intrinsic performances for the ORR reaction). The better performance of the alloy catalyst can be explained by both improved mass transport and a lower ORR resistance. Furthermore, single-cell tests show that the catalyst layer morphology influences the distribution of phosphoric acid during conditioning.",High-temperature polymer electrolyte membrane fuel cell; Platinum-free catalyst; Mass transport; Oxygen reduction reaction; Distribution of relaxation times analysis; Electrochemical impedance spectroscopy,OXYGEN REDUCTION REACTION; METAL-FREE ELECTRODES; PGM-FREE; RELAXATION-TIMES; PHOSPHORIC-ACID; CATHODE CATALYST; ACTIVE-SITES; MEMBRANE; PERFORMANCE; PLATINUM,High-temperature polymer electrolyte membrane fuel cell;Platinum-free catalyst;Mass transport;Oxygen reduction reaction;Distribution of relaxation times analysis;Electrochemical impedance spectroscopy;METAL-FREE ELECTRODES;PGM-FREE;RELAXATION-TIMES;PHOSPHORIC-ACID;CATHODE CATALYST;ACTIVE-SITES;MEMBRANE;PERFORMANCE;PLATINUM,roswitha.zeis@kit.edu,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,,,,,English,J POWER SOURCE ADV,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:000658491000001,2-s2.0-85106592461,Germany;United States,kit.edu,Karlsruhe Inst Technol KIT;Univ Calif Irvine;Helmholtz Zentrwn Berlin Mat & Energie HZB;Bundesanstalt Mat Forsch & Prufung BAM,"Karlsruhe Inst Technol KIT, Germany;Univ Calif Irvine, United States;Helmholtz Zentrwn Berlin Mat & Energie HZB, Germany;Bundesanstalt Mat Forsch & Prufung BAM, Germany","Bevilacqua, N.; Asset, T.; Schmid, M. A.; Markoetter, H.; Manke, I; Atanassov, P.; Zeis, R."
"Li, X., Liu, Q., Li, R., Yue, H., Meng, Y.",Impact of distance effect on synergistic interactions in Fe–N–C single-atom and cluster coupled catalysts: A density functional theory study,2025,International Journal of Hydrogen Energy,189,,152150,,,,0,10.1016/j.ijhydene.2025.152150,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105019642999&doi=10.1016%2Fj.ijhydene.2025.152150&partnerID=40&md5=d2a2c2fef87d7481612a08fb9f34c84f,"Jiangsu University, Zhenjiang, Jiangsu, China; Jiangsu University, Zhenjiang, Jiangsu, China; Ltd. (CST), Shaoxing, China","Li, Xuwen, Jiangsu University, Zhenjiang, Jiangsu, China; Liu, Qingcheng, Jiangsu University, Zhenjiang, Jiangsu, China; Li, Ruina, Jiangsu University, Zhenjiang, Jiangsu, China, Ltd. (CST), Shaoxing, China; Yue, Hua, Ltd. (CST), Shaoxing, China; Meng, Yang, Ltd. (CST), Shaoxing, China","Combining single atoms with clusters is an emerging strategy for designing efficient electrocatalysts, and iron-based nitrogen doped graphene single atom/cluster catalysts (Fe–N–C SAC/ACs) have shown great potential in oxygen reduction reactions. However, the mechanism by which the distance effect between SAC/ACs affects catalytic performance has been largely overlooked. Therefore, this study used density functional theory (DFT) to perform first principles calculations and systematically investigated the regulatory mechanism of distance effect on oxygen reduction reaction (ORR) activity in Fe–N–C SAC/ACs. By constructing four site spacing models (Case-1 to Case-4: 3.7 Å, 6.1 Å, 8.6 Å, 11.1 Å), it was found that the 8.6 Å spacing (Case-3) has excellent thermodynamic stability, the lowest formation energy (Ef = −1.12 eV), and significantly better structural stability than other configurations. The ORR limit overpotential of Case-3 decreased to 0.6 eV, and the adsorption energy of the ∗OH intermediate was −1.8 eV. Analysis of partial density of states (PDOS) and Mulliken charge showed that the appropriate introduction of clusters would redistribute the charge of Fe–N<inf>4</inf> single atom sites and place the ∗OH bond length in the middle position, weakening the activity inhibition caused by strong adsorption. Through regression analysis of adsorption energy (E<inf>ads</inf>), Mulliken charge (QM), and d orbital center, it was revealed that magnetic interactions are the core mechanism regulating ORR activity. This study confirms the universality of distance effect in ORR multi-step catalytic system, providing theoretical basis for the design of Fe–N–C SAC/ACs and promoting the atomic level precise synthesis of non precious metal catalysts for fuel cells. © 2025 Hydrogen Energy Publications LLC",Catalyzer; Cluster; Distance effect; Fe–N–C; PEMFC,Adsorption; Atoms; Binary alloys; Bond length; Design for testability; Doping (additives); Electrocatalysts; Electrolytic reduction; Iron alloys; Iron compounds; Metal analysis; Oxygen; Oxygen reduction reaction; Stability; Adsorption energies; Catalyzer; Cluster; Distance effects; Fe–N–C; P.E.M.F.C; Reaction activity; Single-atoms; ]+ catalyst; Density functional theory,Catalyzer;Cluster;Distance effect;Fe–N–C;PEMFC;Adsorption;Atoms;Binary alloys;Bond length;Design for testability;Doping (additives);Electrocatalysts;Electrolytic reduction;Iron alloys;Iron compounds;Metal analysis;Oxygen;Oxygen reduction reaction;Stability;Adsorption energies;Distance effects;P.E.M.F.C;Reaction activity;Single-atoms;]+ catalyst;Density functional theory,"R. Li; School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China; email: liruina0706@126.com",,,,,,Elsevier Ltd,03603199,0080311393,IJHED,,English,Int J Hydrogen Energy,Article,Scopus,,2-s2.0-105019642999,,China,126.com,,,"Li, X.; Liu, Q.; Li, R.; Yue, H.; Meng, Y."
"Osmieri, L., Wang, H., Neyerlin, K.C.",Impact of fabrication and testing parameters on the performance of a polymer electrolyte fuel cell with Platinum Group Metal (PGM)-free cathode catalyst,2021,Journal of the Electrochemical Society,168,1,014503,,,,20,10.1149/1945-7111/abd48e,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099787976&doi=10.1149%2F1945-7111%2Fabd48e&partnerID=40&md5=0258f7d66ab4fbc647b388adb85ebade,"National Renewable Energy Laboratory, Golden, CO, United States","Osmieri, Luigi, National Renewable Energy Laboratory, Golden, CO, United States; Wang, Hao, National Renewable Energy Laboratory, Golden, CO, United States; Neyerlin, Kenneth C., National Renewable Energy Laboratory, Golden, CO, United States","Extensive research efforts have been made on platinum group metal (PGM)-free electrocatalysts for oxygen reduction reaction, with the aim of lowering the cost hurdle of acidic polymer electrolyte fuel cells (PEFCs). While the activity and durability of PGM-free catalysts have been boosted, the PEFC performance relies also on the electrode structure at the membrane electrode assembly (MEA) level. However, the extensive number of variables involved in the electrode preparation as well as in the fuel cell testing, poses severe challenge to compare results obtained in different labs. In this work, we systematically investigated the effect on performance of some operational variables, such as polarization curve scan direction, and gas flow rates. Additionally, anodic Pt catalyst loading and cathodic PGM-free catalyst loading were investigated. The tests were done in a differential cell hardware using a commercial Fe-N-C catalyst at the cathode. The results indicate that PGM-free catalyst loading and air flow rate on the cathode are impactful variables. Polarization curve scan direction (also considering averaging process on multiple consecutive scans), anode Pt loading as low as 0.035 mg cm−2, as well as H<inf>2</inf> and O<inf>2</inf> flow rates above 300 scm3 min−1 have negligible impact on the performance of PGM-free based MEAs. © 2021 The Author(s).",,Cathodes; Electrocatalysts; Electrolytic reduction; Flow of gases; Iron compounds; Oxygen reduction reaction; Platinum; Polarization; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Scanning; Well testing; Electrode preparation; Electrode structure; Membrane electrode assemblies; Operational variables; Platinum group metals; Polarization curves; Polymer electrolyte fuel cells; Testing parameters; Solid electrolytes,Cathodes;Electrocatalysts;Electrolytic reduction;Flow of gases;Iron compounds;Oxygen reduction reaction;Platinum;Polarization;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Scanning;Well testing;Electrode preparation;Electrode structure;Membrane electrode assemblies;Operational variables;Platinum group metals;Polarization curves;Polymer electrolyte fuel cells;Testing parameters;Solid electrolytes,"K.C. Neyerlin; National Renewable Energy Laboratory, Golden, 80401, United States; email: kenneth.neyerlin@nrel.gov",,,,,,IOP Publishing Ltd,00134651,,JESOA,,English,J Electrochem Soc,Article,Scopus,,2-s2.0-85099787976,,United States,nrel.gov,,,"Osmieri, L.; Wang, H.; Neyerlin, K.C."
"Kato, M., Fujibayashi, N., Abe, D., Matsubara, N., Yasuda, S., Yagi, I.",Impact of heterometallic cooperativity of iron and copper active sites on electrocatalytic oxygen reduction kinetics,2021,ACS Catalysis,11,4,,2356,2365,,53,10.1021/acscatal.0c04753,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85101008410&doi=10.1021%2Facscatal.0c04753&partnerID=40&md5=5dd8e2f5116b30861fc3c60f2de6f486,"Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Hokkaido, Japan; Global Research Center for Environment and Energy Based on Nanomaterials Science (GREEN), National Institute for Materials Science, Tsukuba, Ibaraki, Japan; Graduate School of Environmental Science, Hokkaido University, Sapporo, Hokkaido, Japan; Research Group for Nanoscale Structure and Function of Advanced Materials, Japan Atomic Energy Agency, Kashiwa, Chiba, Japan","Kato, Masaru, Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Hokkaido, Japan, Global Research Center for Environment and Energy Based on Nanomaterials Science (GREEN), National Institute for Materials Science, Tsukuba, Ibaraki, Japan; Fujibayashi, Natsuki, Graduate School of Environmental Science, Hokkaido University, Sapporo, Hokkaido, Japan; Abe, Daiki, Graduate School of Environmental Science, Hokkaido University, Sapporo, Hokkaido, Japan; Matsubara, Naohiro, Graduate School of Environmental Science, Hokkaido University, Sapporo, Hokkaido, Japan; Yasuda, Satoshi, Research Group for Nanoscale Structure and Function of Advanced Materials, Japan Atomic Energy Agency, Kashiwa, Chiba, Japan; Yagi, Ichizo, Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Hokkaido, Japan, Global Research Center for Environment and Energy Based on Nanomaterials Science (GREEN), National Institute for Materials Science, Tsukuba, Ibaraki, Japan","The oxygen reduction reaction (ORR) is a key reaction in polymer electrolyte fuel cells and metal-air batteries. In these electrochemical systems, platinum group metals (PGMs) have been widely used as ORR electrocatalysts. Because of material cost and scarcity of platinum group metals, non-PGM electrocatalysts are considered to be an ideal alternative for mass production with low material cost. Many non-PGM electrocatalysts have been intensively studied such as pyrolyzed Fe-, N-doped carbon (Fe-N-C) catalysts. However, many non-PGM electrocatalysts including Fe-N-C still suffer from product selectivity due to the production of H2O2 as the byproduct. In this work, we synthesized an ORR electrocatalyst of Cu-, Fe-, and N-doped carbon nanotubes, (Cu,Fe)-N-CNT. This heterobimetallic catalyst showed the selective 4e- reduction of O2 to H2O with ca. 99%. Kinetic analysis of the electrocatalytic ORR and hydrogen peroxide reduction reaction (HPRR) in acidic media revealed that (Cu,Fe)-N-CNT showed two orders of magnitude higher rate constants for the direct 4e- reduction of O2 to H2O than those for the 2e- reduction of O2 to H2O2, whereas a monometallic Fe-N-CNT showed the same order of magnitude, indicating that the heterometallic cooperativity had a drastic impact on the ORR kinetics. Our findings would open up possibilities to develop non-PGM ORR electrocatalysts with heterobimetallic active sites for the selective ORR. © 2021 American Chemical Society.",Bio-inspired approach; Electrocatalysis; Heterobimetallic active sites; Non-PGM; Oxygen reduction kinetics; Oxygen reduction reaction; Polymer electrolyte fuel cell,Carbon nanotubes; Copper; Doping (additives); Electrocatalysts; Electrolysis; Electrolytic reduction; Hydrogen peroxide; Iron; Iron compounds; Kinetics; Metal-air batteries; Oxygen; Platinum; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Rate constants; Electrocatalytic oxygen reduction; Electrochemical systems; Hydrogen peroxide reduction; Orders of magnitude; ORR electrocatalysts; Platinum group metals; Polymer electrolyte fuel cells; Product selectivities; Oxygen reduction reaction,Bio-inspired approach;Electrocatalysis;Heterobimetallic active sites;Non-PGM;Oxygen reduction kinetics;Oxygen reduction reaction;Polymer electrolyte fuel cell;Carbon nanotubes;Copper;Doping (additives);Electrocatalysts;Electrolysis;Electrolytic reduction;Hydrogen peroxide;Iron;Iron compounds;Kinetics;Metal-air batteries;Oxygen;Platinum;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Rate constants;Electrocatalytic oxygen reduction;Electrochemical systems;Hydrogen peroxide reduction;Orders of magnitude;ORR electrocatalysts;Platinum group metals;Polymer electrolyte fuel cells;Product selectivities,"M. Kato; Faculty of Environmental Earth Science, Graduate School of Environmental Science, Hokkaido University, Sapporo, 060-0810, Japan; email: masaru.kato@ees.hokudai.ac.jp; I. Yagi; Faculty of Environmental Earth Science, Graduate School of Environmental Science, Hokkaido University, Sapporo, 060-0810, Japan; email: iyagi@ees.hokudai.ac.jp",,,,,,American Chemical Society,21555435,,ACCAC,,English,ACS Catal.,Article,Scopus,,2-s2.0-85101008410,,Japan,ees.hokudai.ac.jp,,,"Kato, M.; Fujibayashi, N.; Abe, D.; Matsubara, N.; Yasuda, S.; Yagi, I."
"Prossl, C., Kubler, M., Paul, S., Ni, L.M., Kinkelin, S.J., Heppe, N., Eberhardt, K., Geppert, C., Jaegermann, W., Stark, R.W., Bron, M., Kramm, U.",Impact of Ir modification on the durability of FeNC catalysts under start-up and shutdown cycle conditions,2022,JOURNAL OF MATERIALS CHEMISTRY A,10,11,,6038,6053,16,9,10.1039/d1ta04668c,,"[Proessl, Carolin; Kuebler, Markus; Paul, Stephen; Ni, Lingmei; Heppe, Nils; Kramm, Ulrike, I] Tech Univ Darmstadt, Dept Chem, Catalysts & Electrocatalysts Grp, Alarich Weiss Str 4, D-64287 Darmstadt, Germany; [Ni, Lingmei; Jaegermann, Wolfram; Stark, Robert W.; Kramm, Ulrike, I] Tech Univ Darmstadt, Dept Mat & Earth Sci, Alarich Weiss Str 2, D-64287 Darmstadt, Germany; [Kinkelin, Simon-Johannes; Bron, Michael] Martin Luther Univ Halle Wittenberg, Inst Chem, Danckelmann Pl 4, D-06120 Halle, Saale, Germany; [Eberhardt, Klaus; Geppert, Christopher] Johannes Gutenberg Univ Mainz, TRIGA Res Reactor, Fritz Stramann Weg 2, D-55128 Mainz, Germany",,"A common problem associated with FeNC catalysts is their poor stability dominated by the carbon oxidation reaction (COR). In this work, the feasibility of stabilizing FeNC catalysts with small quantities of Ir was explored. With iridium being present, instead of COR the oxygen evolution reaction should be favored. The impact on structure and morphology was investigated by Fe-57 Mossbauer spectroscopy, X-ray photoelectron spectroscopy, Raman spectroscopy and transmission electron microscopy. The catalytic activity and durability for the oxygen reduction reaction was evaluated by rotating ring disc electrode experiments and accelerated stress tests mimicking the start-up and shutdown cycle (SSC) conditions, respectively. For selected samples the stability was analysed for SSCs in proton exchange membrane fuel cells. Moreover, the faradaic efficiency towards oxygen evolution reaction vs. COR was determined and the resistance towards COR analysed by in situ Raman spectroscopy. The results indicate indeed a suppression of the COR; however, specifically for fuel cell applications, further optimization is necessary.",,N-C CATALYSTS; OXYGEN REDUCTION REACTION; NITROGEN-DOPED CARBON; FUEL-CELL CATALYSTS; SPECTRAL-ANALYSIS; FE/N/C CATALYSTS; METAL; ELECTROCATALYSTS; STABILITY; MEMBRANE,N-C CATALYSTS;OXYGEN REDUCTION REACTION;NITROGEN-DOPED CARBON;FUEL-CELL CATALYSTS;SPECTRAL-ANALYSIS;FE/N/C CATALYSTS;METAL;ELECTROCATALYSTS;STABILITY;MEMBRANE,,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000712540200001,,Germany,No email,Tech Univ Darmstadt;Martin Luther Univ Halle Wittenberg;Johannes Gutenberg Univ Mainz,"Tech Univ Darmstadt, Germany;Martin Luther Univ Halle Wittenberg, Germany;Johannes Gutenberg Univ Mainz, Germany","Proessl, Carolin; Kuebler, Markus; Paul, Stephen; Ni, Lingmei; Kinkelin, Simon-Johannes; Heppe, Nils; Eberhardt, Klaus; Geppert, Christopher; Jaegermann, Wolfram; Stark, Robert W.; Bron, Michael; Kramm, Ulrike, I"
"Reshetenko, T., Serov, A., Kulikovsky, A., Atanassov, P.",Impedance Spectroscopy Characterization of PEM Fuel Cells with Fe-N-C-Based Cathodes,2019,JOURNAL OF THE ELECTROCHEMICAL SOCIETY,166,10,,F653,F660,8,16,10.1149/2.1431910jes,,"[Reshetenko, Tatyana] Univ Hawaii, Hawaii Nat Energy Inst, Honolulu, HI 96822 USA; [Serov, Alexey] Pajarito Powder LLC, Albuquerque, NM 87109 USA; [Kulikovsky, Andrei] Forschungszentrum Julich, Inst Energy & Climate Res, IEK Electrochem Proc Engn 3, D-52425 Julich, Germany; [Atanassov, Plamen] Univ Calif Irvine, Natl Fuel Cell Res Ctr, Chem & Biomol Engn Dept, Irvine, CA 92697 USA",,"We report impedance spectroscopy analysis of PEM fuel cells built with platinum group metal-free (PGM-free) Fe-N-C cathodes with the catalyst loading and ionomer to catalyst ratio being variable parameters. The dependence of key cathode transport and kinetic parameters on the cell current density J are obtained in the range from 0.025 to 0.4 A cm(-2). The electrode performance is evaluated using the characteristic current densities for proton and oxygen transport in the cathode catalyst layer. Overall, certain electrode configurations demonstrate proton and oxygen transport properties comparable to those of Pt/C systems, making them promising substitutes for platinum at cathodic side of PEM fuel cells. (c) The Author(s) 2019. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited.",,OXYGEN REDUCTION REACTION; CATALYST LAYER; ELECTROCHEMICAL IMPEDANCE; IONIC-CONDUCTIVITY; ACTIVE-SITES; PERFORMANCE; TOLERANCE; ELECTRODES; INSIGHTS; MODEL,OXYGEN REDUCTION REACTION;CATALYST LAYER;ELECTROCHEMICAL IMPEDANCE;IONIC-CONDUCTIVITY;ACTIVE-SITES;PERFORMANCE;TOLERANCE;ELECTRODES;INSIGHTS;MODEL,A.Kulikovsky@fz-juelich.de,,"65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA",,,,ELECTROCHEMICAL SOC INC,0013-4651,,,,English,J ELECTROCHEM SOC,Article,WoS,Electrochemistry; Materials Science,WOS:000473016900001,2-s2.0-85073467383,United States;Germany,fz-juelich.de,Univ Hawaii;Pajarito Powder LLC;Forschungszentrum Julich;Univ Calif Irvine,"Univ Hawaii, United States;Pajarito Powder LLC, United States;Forschungszentrum Julich, Germany;Univ Calif Irvine, United States","Reshetenko, Tatyana; Serov, Alexey; Kulikovsky, Andrei; Atanassov, Plamen"
"Mueller-Huelstede, J., Zierdt, T., Schmies, H., Schonvogel, D., Meyer, Q., Zhao, C., Wagner, P., Wark, M.",Implementation of different Fe-N-C catalysts in high temperature proton exchange membrane fuel cells - Effect of catalyst and catalyst layer on performance,2022,JOURNAL OF POWER SOURCES,537,,231529,,,13,32,10.1016/j.jpowsour.2022.231529,,"[Mueller-Huelstede, Julia; Zierdt, Tanja; Schmies, Henrike; Schonvogel, Dana; Wagner, Peter] German Aerosp Ctr DLR, Inst Engn Thermodynam, Carl von Ossietzky Str 15, D-26129 Oldenburg, Germany; [Mueller-Huelstede, Julia; Wark, Michael] Carl von Ossietzky Univ Oldenburg, Inst Chem, Carl von Ossietzky Str 9-11, D-26129 Oldenburg, Germany; [Meyer, Quentin; Zhao, Chuan] Univ New South Wales, Sch Chem, Sydney, NSW 2052, Australia",,"Fe-N-Cs are an alternative to Pt/C catalysts as they show promising activity towards the oxygen reduction reaction. While several studies are based on thin-film analysis in diluted electrolytes, only few reports show the application of Fe-N-Cs in gas diffusion electrodes (GDE) and their tests under high temperature proton exchange membrane fuel cell (HT-PEMFC) conditions. Here, a series of Fe-N-Cs with different physical properties are analyzed. GDEs are fabricated using ultrasonic spray and doctor blade coating to investigate the effect of coating method on the morphology and performance. Morphological analysis identified thinner catalyst layers for spray coating and inhomogeneous PTFE distribution for doctor blade coated GDEs. Electrochemical characterization in the HT-PEM half-cell displays significantly lower performance for ultrasonic spray-coated GDEs, possibly due to more pronounced phosphoric acid penetration. On the contrary, implementation of GDEs as cathodes in the HTPEMFC yields comparable performances for both coating methods but differences in ORR and proton transport resistances determined by distribution of relaxation times analysis. Moreover, it was shown that inhomogeneous PTFE distribution caused by high amounts of hydrophilic O-/N-functionalities negatively affects HT-PEMFC performance. This study helps to understand the impact of GDE fabrication and Fe-N-C catalyst properties in HT-PEM half- and single-cell application.",High-temperature proton exchange membrane; fuel cell; Gas diffusion electrode; Ultrasonic spraying; Doctor blade coating; Iron-nitrogen-carbon; Oxygen reduction reaction,RELAXATION-TIMES; ELECTROCATALYSTS; FEASIBILITY; ADSORPTION; STABILITY; PHOSPHATE; IMPEDANCE; IMPACT,High-temperature proton exchange membrane;fuel cell;Gas diffusion electrode;Ultrasonic spraying;Doctor blade coating;Iron-nitrogen-carbon;Oxygen reduction reaction;RELAXATION-TIMES;ELECTROCATALYSTS;FEASIBILITY;ADSORPTION;STABILITY;PHOSPHATE;IMPEDANCE;IMPACT,julia.huelstede@dlr.de,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:000800140100005,2-s2.0-85129762617,Germany;Australia,dlr.de,German Aerosp Ctr DLR;Carl von Ossietzky Univ Oldenburg;Univ New South Wales,"German Aerosp Ctr DLR, Germany;Carl von Ossietzky Univ Oldenburg, Germany;Univ New South Wales, Australia","Mueller-Huelstede, Julia; Zierdt, Tanja; Schmies, Henrike; Schonvogel, Dana; Meyer, Quentin; Zhao, Chuan; Wagner, Peter; Wark, Michael"
"Gokhale, R., Asset, T., Qian, G., Serov, A., Artyushkova, K., Benicewicz, B.C., Atanassov, P.",Implementing PGM-free electrocatalysts in high-temperature polymer electrolyte membrane fuel cells,2018,ELECTROCHEMISTRY COMMUNICATIONS,93,,,91,94,4,33,10.1016/j.elecom.2018.06.019,,"[Gokhale, Rohan; Asset, Tristan; Serov, Alexey; Artyushkova, Kateryna; Atanassov, Plamen] Univ New Mexico, Ctr Microengn Mat CMEM, Dept Chem & Biol Engn, Albuquerque, NM 87131 USA; [Qian, Guoqing; Benicewicz, Brian C.] Univ South Carolina, Dept Chem & Biochem, Columbia, SC 29208 USA",,"Polymer Electrolyte Membrane Fuel Cells (PEMFCs) face numerous challenges, involving the membrane nature and the active material for the cathodic reaction. A way to achieve more efficient PEMFCs is to increase their operating temperature above 373 K: High-Temperature PEMFCs (HT-PEMFCs). In this communication, we introduce for the first time the use of platinum group metal-free electrocatalysts (PGM-free) for oxygen reduction reaction (ORR) in HT-PEMFC, namely an iron-nitrogen-carbon (Fe-N-C) electrocatalyst synthesized by the sacrificial support method and discuss their performances. A cell voltage of 0.43 V was observed at 0.2 A cm(geo)(-2), this activity being greatly improved by increasing the back-pressure of the PEMFC (from 0.0 to 3.0 x 10(5) Pa), reaching a polarization of 0.65 V at 0.2 A cm(geo)(-2) (at 433 K, O-2 at the cathode), thus proving that the main limitations of the HT-PEMFC with a Fe-N-C cathode were not induced by the intrinsic activity of the electrocatalyst, but by the transport of the oxygen throughout the electrocatalyst structure.",High-temperature proton exchange membrane fuel cell; Non-platinum metal group electrocatalysts; Single-cell; Back-pressure,OXYGEN REDUCTION REACTION; CATALYSTS; PERFORMANCE; PBI; POLYBENZIMIDAZOLES; PEMFC; SITU,High-temperature proton exchange membrane fuel cell;Non-platinum metal group electrocatalysts;Single-cell;Back-pressure;OXYGEN REDUCTION REACTION;CATALYSTS;PERFORMANCE;PBI;POLYBENZIMIDAZOLES;PEMFC;SITU,benice@mailbox.sc.edu; plamen@unm.edu,,"STE 800, 230 PARK AVE, NEW YORK, NY 10169 USA",,,,ELSEVIER SCIENCE INC,1388-2481,,,,English,ELECTROCHEM COMMUN,Article,WoS,Electrochemistry,WOS:000439858800020,2-s2.0-85049310843,United States,mailbox.sc.edu,Univ New Mexico;Univ South Carolina,"Univ New Mexico, United States;Univ South Carolina, United States","Gokhale, Rohan; Asset, Tristan; Qian, Guoqing; Serov, Alexey; Artyushkova, Kateryna; Benicewicz, Brian C.; Atanassov, Plamen"
"Liang, Z., Zheng, H., Cao, R.",Importance of Electrocatalyst Morphology for the Oxygen Reduction Reaction,2019,ChemElectroChem,6,10,,2600,2614,,60,10.1002/celc.201801859,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85063813400&doi=10.1002%2Fcelc.201801859&partnerID=40&md5=4a77963c08b5d7c778a69a9e56c852f5,"Key Laboratory of Applied Surface and Colloid Chemistry, Shaanxi Normal University, Xi'an, Shaanxi, China","Liang, Zuozhong, Key Laboratory of Applied Surface and Colloid Chemistry, Shaanxi Normal University, Xi'an, Shaanxi, China; Zheng, Haoquan, Key Laboratory of Applied Surface and Colloid Chemistry, Shaanxi Normal University, Xi'an, Shaanxi, China; Cao, Rui, Key Laboratory of Applied Surface and Colloid Chemistry, Shaanxi Normal University, Xi'an, Shaanxi, China","Proton/anion-exchange membrane fuel cells (PEMFC and AEMFC), generating electricity from the H<inf>2</inf> energy with zero-carbon emission, have become very promising energy conversion devices to meet the increasing energy demand and reduce the dependence on fossil fuels. Currently, platinum (Pt) based materials have proven to be the most efficient electrocatalysts for the oxygen reduction reaction (ORR) at the cathode of the PEMFC and AEMFC. However, the high price and the limited reserve of Pt greatly hinder their industrial applications. Recently, transition metal-nitrogen-carbon (M−N−C) based material, as an efficient alternative to replace the precious metal Pt-based material, has attracted researchers’ attention. Great contributions have been devoted to develop M−N−C based electrocatalysts. This review summarizes recent advances on M−N−C based electrocatalysts used for ORR from the point view of morphology. One-dimensional (1D), two-dimensional (2D), three-dimensional (3D) and multi-dimensional (MD) M−N−C materials were discussed thoroughly with particular attention on the relationship between the structure and the catalytic activity. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",electrocatalysis; fuel cells; morphology; M−N−C materials; oxygen reduction reaction,Carbon; Catalyst activity; Electrocatalysis; Electrocatalysts; Electrolysis; Electrolytic reduction; Energy conversion; Fossil fuels; Fuel cells; Morphology; Oxygen; Proton exchange membrane fuel cells (PEMFC); Transition metals; Energy conversion devices; Energy demands; Membrane fuel cells; Multi dimensional; Nitrogen-carbon; Oxygen reduction reaction; Threedimensional (3-d); Two Dimensional (2 D); Platinum metals,electrocatalysis;fuel cells;morphology;M−N−C materials;oxygen reduction reaction;Carbon;Catalyst activity;Electrocatalysts;Electrolysis;Electrolytic reduction;Energy conversion;Fossil fuels;Oxygen;Proton exchange membrane fuel cells (PEMFC);Transition metals;Energy conversion devices;Energy demands;Membrane fuel cells;Multi dimensional;Nitrogen-carbon;Threedimensional (3-d);Two Dimensional (2 D);Platinum metals,"H. Zheng; Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China; email: zhenghaoquan@snnu.edu.cn",,,,,,Wiley-VCH Verlag,,,,,English,ChemElectroChem,Review,Scopus,,2-s2.0-85063813400,,China,snnu.edu.cn,,,"Liang, Z.; Zheng, H.; Cao, R."
"Li, S., Sun, E., Wei, P., Zhao, W., Pei, S., Chen, Y., Yang, J., Chen, H., Yin, X., Wang, M., Li, Y.",Impregnation of ionic liquid into porous Fe-N-C electrocatalyst to improve electrode kinetics and mass transport for polymer electrolyte fuel cells,2025,Chinese Journal of Catalysis,72,,,277,288,,2,10.1016/S1872-2067(25)64654-7,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105005500742&doi=10.1016%2FS1872-2067%2825%2964654-7&partnerID=40&md5=84a1851d5ac665fb38e6ba7a89157acf,"School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, Shanxi, China; College of New Energy, China University of Petroleum (East China), Qingdao, Shandong, China; State Key Laboratory of Coal Conversion, Institute of Coal Chemistry Chinese Academy of Sciences, Taiyuan, Shanxi, China","Li, Siming, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, Shanxi, China; Sun, Enyang, College of New Energy, China University of Petroleum (East China), Qingdao, Shandong, China; Wei, Pengfei, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, Shanxi, China; Zhao, Wei, College of New Energy, China University of Petroleum (East China), Qingdao, Shandong, China; Pei, Suizhu, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, Shanxi, China; Chen, Ying, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, Shanxi, China; Yang, Jie, State Key Laboratory of Coal Conversion, Institute of Coal Chemistry Chinese Academy of Sciences, Taiyuan, Shanxi, China; Chen, Huili, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, Shanxi, China; Yin, Xi, State Key Laboratory of Coal Conversion, Institute of Coal Chemistry Chinese Academy of Sciences, Taiyuan, Shanxi, China; Wang, Min, College of New Energy, China University of Petroleum (East China), Qingdao, Shandong, China; Li, Yawei, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, Shanxi, China","Developing efficient and stable non-precious metal catalysts is essential for replacing platinum-based catalysts in polymer electrolyte membrane fuel cells (PEMFCs). The transition metal and nitrogen co-doped carbon electrocatalyst (M-N-C) is considered an effective alternative to precious metal catalysts. However, its relatively poor performance in acidic environments has always been a problem plaguing its practical application in PEMFCs. This study presents a sequential deposition methodology for constructing a composite catalytic system of Fe-N-C and ionic liquid (IL), which exhibits improved performance at both half-cell and membrane electrode assembly scales. The presence of IL significantly inhibits H<inf>2</inf>O<inf>2</inf> production, preferentially promoting the 4e– O<inf>2</inf> reduction reaction, resulting in improved electrocatalytic activity and stability. Additionally, the enhanced PEMFC performance of IL containing electrodes is a direct result of the improved ionic and reactant accessibility of the pore confined Fe-N-C catalysts where the IL minimizes local resistive transport losses. This study establishes a strategic foundation for the practical utilization of non-precious metal catalysts in PEMFCs and other energy converting technologies. © 2025 Dalian Institute of Chemical Physics, the Chinese Academy of Sciences",Electrocatalysis; Fuel cell; Ionic liquid; Non-platinum group metal; Oxygen reduction reaction,Electrolysis; Electrolytes; Liquid membrane electrodes; Palladium; Platinum; Polymer membrane electrodes; Rhodium; Electrode kinetics; Membrane fuel cells; Non-platinum; Non-platinum group metal; Non-precious metal catalysts; Oxygen reduction reaction; Platinum based catalyst; Platinum group metals; Polymer electrolyte fuel cells; Polymer electrolyte membranes; Electrolytic reduction,Electrocatalysis;Fuel cell;Ionic liquid;Non-platinum group metal;Oxygen reduction reaction;Electrolysis;Electrolytes;Liquid membrane electrodes;Palladium;Platinum;Polymer membrane electrodes;Rhodium;Electrode kinetics;Membrane fuel cells;Non-platinum;Non-precious metal catalysts;Platinum based catalyst;Platinum group metals;Polymer electrolyte fuel cells;Polymer electrolyte membranes;Electrolytic reduction,"X. Yin; State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi, 030001, China; email: xiyin@sxicc.ac.cn",,,,,,Science Press,18722067,,CJCHC,,English,Chin. J. Catal.,Article,Scopus,,2-s2.0-105005500742,,China,sxicc.ac.cn,,,"Li, S.; Sun, E.; Wei, P.; Zhao, W.; Pei, S.; Chen, Y.; Yang, J.; Chen, H.; Yin, X.; Wang, M.; Li, Y."
"Huang, L., Xie, J., Chen, R., Chu, D., Hsu, A.T.",Improved durability of iron promoted non-precious metal catalysts for hydrogen generation through bio-ethanol reforming,2009,ECS Transactions,16,2 PART 1,,523,531,,0,10.1149/1.2981887,https://www.scopus.com/inward/record.uri?eid=2-s2.0-63149105922&doi=10.1149%2F1.2981887&partnerID=40&md5=e0242cd0f5b4d952a04e7ec477efa93d,"College of Engineering, West Lafayette, IN, United States; U.S. Army Research Laboratory, Adelphi, MD, United States","Huang, Lihong, College of Engineering, West Lafayette, IN, United States; Xie, Jian, College of Engineering, West Lafayette, IN, United States; Chen, Rongrong, College of Engineering, West Lafayette, IN, United States; Chu, Deryn D., U.S. Army Research Laboratory, Adelphi, MD, United States; Hsu, Andrew T., College of Engineering, West Lafayette, IN, United States","Nickel-based catalysts with iron promotion were prepared by impregnation, tested in auto-thermal reforming (ATR) of bioethanol for hydrogen production. The reaction results show a remarkable improved durability in catalytic activity as well as selectivity to hydrogen in ATR is obtained: Over the 10 wt.% ironloading nickel catalyst, conversion of ethanol at 99.61 % and selectivity of hydrogen around 115 % are kept at 600 °C during a 30-hour test, while that of iron-free sample decreases sharply from 85.10 % to 19.71 % on hydrogen selectivity within a 26-hour test. The improved durability is attributed to the synergistic effect of the NiAl<inf>2</inf>O<inf>4</inf>-FeAl<inf>2</inf>O <inf>4</inf> mixed crystals that are more resistant to sintering and oxidation in the oxidative atmosphere of ATR. © The Electrochemical Society.",,Automotive industry; Bioethanol; Catalyst activity; Catalyst selectivity; Durability; Ethanol; Hydrogen production; Iron; Nickel; Sintering; Autothermal reforming; Hydrogen generations; Hydrogen selectivity; Nickel based catalysts; Nickel catalyst; Non-precious metal catalysts; Oxidative atmosphere; Synergistic effect; Proton exchange membrane fuel cells (PEMFC),Automotive industry;Bioethanol;Catalyst activity;Catalyst selectivity;Durability;Ethanol;Hydrogen production;Iron;Nickel;Sintering;Autothermal reforming;Hydrogen generations;Hydrogen selectivity;Nickel based catalysts;Nickel catalyst;Non-precious metal catalysts;Oxidative atmosphere;Synergistic effect;Proton exchange membrane fuel cells (PEMFC),,,,"Proton Exchange Membrane Fuel Cells 8, PEMFC - 214th ECS Meeting",,,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-63149105922,,United States,No email,,,"Huang, L.; Xie, J.; Chen, R.; Chu, D.; Hsu, A.T."
"Hsu, R.S., Chen, Z.",Improved synthesis method for a cyanamide derived non-precious ORR catalyst for PEFCs,2010,ECS Transactions,28,23,,39,46,,4,10.1149/1.3502335,https://www.scopus.com/inward/record.uri?eid=2-s2.0-79959512131&doi=10.1149%2F1.3502335&partnerID=40&md5=4b594fa86859ae3730600c3219f61d01,"Waterloo Institute for Nanotechnology, Waterloo, ON, Canada","Hsu, Ryan S., Waterloo Institute for Nanotechnology, Waterloo, ON, Canada; Chen, Zhongwei, Waterloo Institute for Nanotechnology, Waterloo, ON, Canada","Non-noble catalysts synthesized using an iron salt, cyanamide and Ketjen Black EC-600JD were developed as ORR active Fe-N/C materials for PEFC applications. The resulting initial Fe-cyan-KJ600 catalyst demonstrated poor ORR performance, however, through the addition of NH<inf>3</inf> during the pyrolysis treatment, and by modifications of the synthesis procedure to include a second coating and pyrolysis stage, the ORR performance increased drastically. The present study utilizes X-ray diffraction, scanning electron microscopy, nitrogen adsorption/desorption, and electrochemical analysis in characterizing the synthesized samples to determine the morphological and electrochemical effects of the aforementioned treatment steps. ©The Electrochemical Society.",,Ammonia; Catalysts; Gas adsorption; Oxygen reduction reaction; Proton exchange membrane fuel cells (PEMFC); Pyrolysis; Scanning electron microscopy; Electrochemical analysis; Electrochemical effects; Iron salts; Ketjen black; Nitrogen adsorption; Orr catalysts; Synthesis method; Synthesis procedure; Iron compounds,Ammonia;Catalysts;Gas adsorption;Oxygen reduction reaction;Proton exchange membrane fuel cells (PEMFC);Pyrolysis;Scanning electron microscopy;Electrochemical analysis;Electrochemical effects;Iron salts;Ketjen black;Nitrogen adsorption;Orr catalysts;Synthesis method;Synthesis procedure;Iron compounds,"Z. Chen; Department of Chemical Engineering, Waterloo Institute of Nanotechnology, University of Waterloo, Waterloo, ON N2L 3G1, Canada; email: zhwchen@uwaterloo.ca",,,,,,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-79959512131,,Canada,uwaterloo.ca,,,"Hsu, R.S.; Chen, Z."
"Ruggeri, S., Dodelet, J.P.",Improvement of heat-treated Fe/N/C-based catalysts for oxygen reduction in PEM fuel cells by using new carbon black powders as catalyst supports,2006,ECS Transactions,3,1,,231,240,,2,10.1149/1.2356141,https://www.scopus.com/inward/record.uri?eid=2-s2.0-33846948911&doi=10.1149%2F1.2356141&partnerID=40&md5=8e27f62da0df8b36e7fca516b1532b2f,"Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada","Ruggeri, Stéphane, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Dodelet, Jean Pol, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada","Several new developmental carbon blacks were prepared at the Sid Richardson Carbon Black Corporation by injecting ammonia, methane or water vapor in the carbon black furnace during their fabrication. These new carbon powders were then used to obtain Fe/N/C catalysts for oxygen reduction reaction (ORR) in the acidic conditions prevailing in PEM fuel cells. The best catalysts were obtained when ammonia and methane were injected in the carbon black furnace during its production. The results are interpreted in terms of structural changes induced in the carbon blacks during their fabrication. These changes influence their subsequent reaction rate with NH<inf>3</inf> when the structurally modified carbon black supports, loaded with 0.2 wt% Fe, are heat-treated at 950°C in pure ammonia to obtain the catalysts. This etching reaction produces up to ten times more catalytic sites with these modified carbon blacks than with their respective regular forms. copyright The Electrochemical Society.",,Ammonia; Carbon black; Etching; Fuel cells; Heat treatment; Iron compounds; Methane; Redox reactions; Carbon powders; Catalytic sites; Reaction rates; Catalysts,Ammonia;Carbon black;Etching;Fuel cells;Heat treatment;Iron compounds;Methane;Redox reactions;Carbon powders;Catalytic sites;Reaction rates;Catalysts,,,,Proton Exchange Membrane Fuel Cells 6 - 210th Electrochemical Society Meeting,,,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-33846948911,,Canada,No email,,,"Ruggeri, S.; Dodelet, J.-P."
"Kobayashi, R., Ishii, M., Ozaki, J.I.",Improvement of the electrochemical oxidation resistance of Ketjen black by Cl-doping: Characterization of materials and possible mechanisms,2025,Carbon,234,,120011,,,,0,10.1016/j.carbon.2025.120011,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85215579727&doi=10.1016%2Fj.carbon.2025.120011&partnerID=40&md5=83e67e0f563399a66c77695a75f2c9c8,"Faculty of Science and Technology, Gunma University, Maebashi, Gunma, Japan","Kobayashi, Rieko, Faculty of Science and Technology, Gunma University, Maebashi, Gunma, Japan; Ishii, Miho, Faculty of Science and Technology, Gunma University, Maebashi, Gunma, Japan; Ozaki, Junichi, Faculty of Science and Technology, Gunma University, Maebashi, Gunma, Japan","The high operating temperature of proton exchange membrane fuel cells (PEFCs) causes the degradation of the cathode catalyst. These catalysts, both Pt-supported and non-precious metal catalysts, degrade owing to the electrochemical oxidation of the carbon catalyst support. In this study, we investigated the use of chlorine, known for its ability to nondestructively modify carbon, as a dopant to suppress the electrochemical oxidation of carbon. The resistance of Cl-doped carbon against electrochemical oxidation was studied. Cl-doping was optimal at 400 °C under chlorine gas, resulting in the covalent bonding of chlorine to the carbon surface. The work function increased without the carbon structure changing due to Cl-doping. Cl-doping decreased the effective surface area of electrochemical oxidation, which suppressed CO<inf>2</inf> emission and the formation of oxygen surface groups with electrochemical oxidation at 1.5 V vs. RHE. The higher work function or the formation of covalent Cl bonds with carbon could be responsible for the higher electrochemical resistance. Our findings demonstrated Cl-doping to be an effective approach with the potential to completely suppress the electrochemical oxidation of carbon to improve the durability of fuel cell catalysts. © 2025 The Authors",Carbon corrosion; Chlorination; Electrochemical oxidation; Electrochemical oxidation resistance; Fuel cells,Chlorination; Chlorine compounds; Covalent bonds; Electrochemical oxidation; High temperature corrosion; Oxidation resistance; Oxygen permeable membranes; Palladium; Platinum compounds; Semiconductor doping; Carbon corrosion; Cathode catalyst; Electrochemical oxidation resistance; Electrochemicals; High operating temperature; Ketjen black; Possible mechanisms; Proton-exchange membranes fuel cells; ]+ catalyst; Electrochemical corrosion,Carbon corrosion;Chlorination;Electrochemical oxidation;Electrochemical oxidation resistance;Fuel cells;Chlorine compounds;Covalent bonds;High temperature corrosion;Oxidation resistance;Oxygen permeable membranes;Palladium;Platinum compounds;Semiconductor doping;Cathode catalyst;Electrochemicals;High operating temperature;Ketjen black;Possible mechanisms;Proton-exchange membranes fuel cells;]+ catalyst;Electrochemical corrosion,"J.-I. Ozaki; of Science and Technology, Gunma University, Kiryu, 1-5-1 Tenjin-cho, Gunma, 376-8515, Japan; email: jozaki@gunma-u.ac.jp",,,,,,Elsevier Ltd,00086223,,CRBNA,,English,Carbon,Article,Scopus,,2-s2.0-85215579727,,Japan,gunma-u.ac.jp,,,"Kobayashi, R.; Ishii, M.; Ozaki, J.-I."
"Miao, Z.P., Wang, X.M., Zhao, Z.L., Zuo, W.B., Chen, S.Q., Li, Z.Q., He, Y.H., Liang, J.S., Ma, F., Wang, H.L., Lu, G., Huang, Y.H., Wu, G., Li, Q.",Improving the Stability of Non-Noble-Metal M-N-C Catalysts for Proton-Exchange-Membrane Fuel Cells through M-N Bond Length and Coordination Regulation,2021,ADVANCED MATERIALS,33,39,2006613,,,9,170,10.1002/adma.202006613,,"[Miao, Zhengpei; Li, Zhiqiang; Liang, Jiashun; Ma, Feng; Huang, Yunhui; Li, Qing] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China; [Wang, Xiaoming] Shantou Univ, Dept Chem, Shantou 515063, Peoples R China; [Wang, Xiaoming] Shantou Univ, Key Lab Preparat & Applicat Ordered Struct Mat Gu, Shantou 515063, Peoples R China; [Zhao, Zhonglong; Lu, Gang] Calif State Univ Northridge, Dept Phys & Astron, Northridge, CA 91330 USA; [Zuo, Wenbin] Wuhan Univ, Sch Phys & Technol, Key Lab Artificial Micro & Nanomat, Minist Educ, Wuhan 430072, Peoples R China; [Zuo, Wenbin] Wuhan Univ, Sch Phys & Technol, Hubei Key Lab Nucl Solid Phys, Wuhan 430072, Peoples R China; [Chen, Shaoqing; Wang, Hsing-Lin] Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China; [He, Yanghua; Wu, Gang] Univ Buffalo State Univ New York, Dept Chem & Biol Engn, Buffalo, NY 14260 USA",,"An effective and universal strategy is developed to enhance the stability of the non-noble-metal M-N-x/C catalyst in proton exchange membrane fuel cells (PEMFCs) by improving the bonding strength between metal ions and chelating polymers, i.e., poly(acrylic acid) (PAA) homopolymer and poly(acrylic acid-maleic acid) (P(AA-MA)) copolymer with different AA/MA ratios. Mossbauer spectroscopy and X-ray absorption spectroscopy (XAS) reveal that the optimal P(AA-MA)-Fe-N catalyst with a higher Fe3+-polymer binding constant possesses longer Fe-N bonds and exclusive Fe-N-4/C moiety compared to PAA-Fe-N, which consists of approximate to 15% low-coordinated Fe-N-2/N-3 structures. The optimized P(AA-MA)-Fe-N catalyst exhibits outstanding ORR activity and stability in both half-cell and PEMFC cathodes, with the retention rate of current density approaching 100% for the first 37 h at 0.55 V in an H-2-air fuel cell. Density functional theory (DFT) calculations suggest that the Fe-N-4/C site could optimize the difference between the adsorption energy of the Fe atoms on the support (E-ad) and the bulk cohesive energy (E-coh) relative to Fe-N-2/N-3 moieties, thereby strongly stabilizing Fe centers against demetalation.",electrocatalysis; fuel cells; M-N-C catalysts; oxygen reduction; single atom catalysts; stability,OXYGEN REDUCTION REACTION; FE/N/C CATALYSTS; ACIDIC MEDIA; PERFORMANCE; IRON; CARBON; ELECTROCATALYSTS; SITES; GENERATION; HYDROGEL,electrocatalysis;fuel cells;M-N-C catalysts;oxygen reduction;single atom catalysts;stability;OXYGEN REDUCTION REACTION;FE/N/C CATALYSTS;ACIDIC MEDIA;PERFORMANCE;IRON;CARBON;ELECTROCATALYSTS;SITES;GENERATION;HYDROGEL,qing_li@hust.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,0935-9648,,,34396608,English,ADV MATER,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000685617000001,2-s2.0-85112481677,China;United States,hust.edu.cn,Huazhong Univ Sci & Technol;Shantou Univ;Calif State Univ Northridge;Wuhan Univ;Southern Univ Sci & Technol;Univ Buffalo State Univ New York,"Huazhong Univ Sci & Technol, China;Shantou Univ, China;Calif State Univ Northridge, United States;Wuhan Univ, China;Southern Univ Sci & Technol, China;Univ Buffalo State Univ New York, United States","Miao, Zhengpei; Wang, Xiaoming; Zhao, Zhonglong; Zuo, Wenbin; Chen, Shaoqing; Li, Zhiqiang; He, Yanghua; Liang, Jiashun; Ma, Feng; Wang, Hsing-Lin; Lu, Gang; Huang, Yunhui; Wu, Gang; Li, Qing"
"Muller-Hulstede, J., Schonvogel, D., Schmies, H., Wagner, P., Dyck, A., Wark, M.",Incorporation of Activated Biomasses in Fe-N-C Catalysts for Oxygen Reduction Reaction with Enhanced Stability in Acidic Media,2021,ACS Applied Energy Materials,4,7,,6912,6922,,22,10.1021/acsaem.1c01018,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85109667086&doi=10.1021%2Facsaem.1c01018&partnerID=40&md5=9d02f60f260089029c1ddab43947f210,"Institute of Engineering Thermodynamics, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany; Institute of Chemistry, Universität Oldenburg, Oldenburg, Niedersachsen, Germany; Institute of Networked Energy Systems, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany","Müller-Hülstede, Julia, Institute of Engineering Thermodynamics, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany, Institute of Chemistry, Universität Oldenburg, Oldenburg, Niedersachsen, Germany; Schonvogel, Dana, Institute of Engineering Thermodynamics, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany; Schmies, Henrike, Institute of Engineering Thermodynamics, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany; Wagner, Peter, Institute of Engineering Thermodynamics, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany; Dyck, Alexander, Institute of Networked Energy Systems, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany; Wark, Michael, Institute of Chemistry, Universität Oldenburg, Oldenburg, Niedersachsen, Germany","Fe-N-C materials are promising oxygen reduction reaction (ORR) catalysts for replacing expensive platinum-based catalysts (Pt/C) in proton exchange membrane fuel cells. However, they still show low volumetric activity and stability compared to Pt/C catalysts, with carbon corrosion being one of the main factors for the loss of active Fe-Nxsites. Within this study, phosphoric acid-activated rye straw and coconut shells are revealed as a promising matrix for Fe-Nxsites with advanced stability against electrochemical carbon corrosion (5000 cycles, 1.0-1.5 V<inf>RHE</inf>, and 0.1 M HClO<inf>4</inf>) compared to a common Fe-N-C catalyst based on carbon black. Electrochemical characterization of the two biomass-based catalysts (Fe-N-C<inf>Bio</inf>) shows on the one hand 50% higher stability in terms of mass activity as well as comparable activity and active site density but on the other hand a lower selectivity toward the four-electron ORR than the common Fe-N-C catalyst. Nitrite stripping experiments in acetate buffer as an electrolyte display a 1.5-fold stronger effect of carboxylic acid adsorption than on a common Fe-N-C catalyst, revealing differences to the electronic structure of the Fe-N-C<inf>Bio</inf>catalyst. This difference is mainly attributed to the presence of phosphor species and higher amounts of nitrogen functionalities in the Fe-N-C<inf>Bio</inf>catalysts. The presence of P is assumed to stabilize the carbon against carbon corrosion by inhibiting electron withdrawal from the C. This study points out the impact factors on Fe-N-C stability and further shows the promising application of activated biomasses in more stable and sustainable Fe-N-C catalysts for ORR. © 2021 The Authors. Published by American Chemical Society",activated biomass; non-PGM catalysts; ORR; PEMFC; stability,Biomass; Carbon black; Catalyst activity; Catalyst selectivity; Chlorine compounds; Electrochemical corrosion; Electrolytes; Electrolytic reduction; Electronic structure; Oxygen; Oxygen reduction reaction; Phosphoric acid; Proton exchange membrane fuel cells (PEMFC); Stability; Acetate buffers; Active site density; Carbon corrosion; Electrochemical characterizations; Electron withdrawal; Enhanced stability; Nitrogen functionalities; Platinum based catalyst; Iron compounds,activated biomass;non-PGM catalysts;ORR;PEMFC;stability;Biomass;Carbon black;Catalyst activity;Catalyst selectivity;Chlorine compounds;Electrochemical corrosion;Electrolytes;Electrolytic reduction;Electronic structure;Oxygen;Oxygen reduction reaction;Phosphoric acid;Proton exchange membrane fuel cells (PEMFC);Acetate buffers;Active site density;Carbon corrosion;Electrochemical characterizations;Electron withdrawal;Enhanced stability;Nitrogen functionalities;Platinum based catalyst;Iron compounds,"J. Müller-Hülstede; Institute of Engineering Thermodynamics, German Aerospace Center (DLR), Oldenburg, 26129, Germany; email: Julia.huelstede@dlr.de",,,,,,American Chemical Society,,,,,English,ACS Appl. Ener. Mat.,Article,Scopus,,2-s2.0-85109667086,,Germany,dlr.de,,,"Muller-Hulstede, J.; Schonvogel, D.; Schmies, H.; Wagner, P.; Dyck, A.; Wark, M."
"Yin, X., Utetiwabo, W., Sun, S.H., Lian, Y.M., Chen, R.J., Yang, W.",Incorporation of CeF3 on single-atom dispersed Fe/N/C with oxophilic interface as highly durable electrocatalyst for proton exchange membrane fuel cell,2019,JOURNAL OF CATALYSIS,374,,,43,50,8,39,10.1016/j.jcat.2019.04.028,,"[Yin, Xue; Utetiwabo, Wellars; Lian, Yimeng; Yang, Wen] Beijing Inst Technol, Key Lab Cluster Sci, Beijing Key Lab Photoelect Electrophoton Convers, Minist Educ,Sch Chem & Chem Engn, Beijing 100081, Peoples R China; [Sun, Shuhui] Inst Natl Rech Sci Energie Mat & Telecommun, 1650 Blvd Lionel Boulet, Varennes, PQ J3X 1S2, Canada; [Chen, Renjie] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China",,"Herein, we demonstrate a bottom-up synthetic method resulting in a nanocomposite which consist of cerium fluoride (CeF3) embedded in iron-nitrogen-doped porous carbon (Fe/N/C) utilizing fluorination and ammonia annealing. High-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) combined with X-ray absorption spectroscopy (XAS) verifies that the Fe species are present as Fe-N-4 coordination at an atomic level in the CeF3-Fe/N/C catalyst. A high-spin Fe3+-N-4 configuration in the nitrogen-doped carbon revealed by Fe-57 Mossbauer spectrum and X-ray absorption spectroscopy for Fe L-edge, which will contribute to the oxygen reduction reaction (ORR) activity in acid electrolyte. CeF3 embedded into the structure of Fe/N/C not only form the oxophilic interface, but also regulate the surface chemical state of Fe and Ce species as well as boosting ORR in acidic solution. The presence of Ce3+ sites at the CeF3-Fe/N/C hybrid catalyst could enhance the O-2 adsorption capability and promote H2O2 reducing to water efficiently, thus greatly improve of the electrochemical performance and durability of Fe/N/C catalyst is demonstrated in proton exchange membrane fuel cell (PEMFC). (C) 2019 Elsevier Inc. All rights reserved.",Oxophilic interface; Ce3+ sites; CeF3-Fe/N/C hybrid catalyst; Oxygen reduction reaction; Durability,OXYGEN REDUCTION REACTION; X-RAY-ABSORPTION; N-DOPED CARBON; CEO2/CEF3 COMPOSITE; POROUS CARBON; PARTICLE-SIZE; CATALYSTS; CEO2; NANOPARTICLES; PERFORMANCE,Oxophilic interface;Ce3+ sites;CeF3-Fe/N/C hybrid catalyst;Oxygen reduction reaction;Durability;X-RAY-ABSORPTION;N-DOPED CARBON;CEO2/CEF3 COMPOSITE;POROUS CARBON;PARTICLE-SIZE;CATALYSTS;CEO2;NANOPARTICLES;PERFORMANCE,wenyang@bit.edu.cn,,"525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA",,,,ACADEMIC PRESS INC ELSEVIER SCIENCE,0021-9517,,,,English,J CATAL,Article,WoS,Chemistry; Engineering,WOS:000483423600005,2-s2.0-85065101359,China;Canada,bit.edu.cn,Beijing Inst Technol;Inst Natl Rech Sci Energie Mat & Telecommun,"Beijing Inst Technol, China;Inst Natl Rech Sci Energie Mat & Telecommun, Canada","Yin, Xue; Utetiwabo, Wellars; Sun, Shuhui; Lian, Yimeng; Chen, Renjie; Yang, Wen"
"Charreteur, F., Ruggeri, S., Jaouen, F., Dodelet, J.P.",Increasing the activity of Fe/N/C catalysts in PEM fuel cell cathodes using carbon blacks with a high-disordered carbon content,2008,ELECTROCHIMICA ACTA,53,23,,6881,6889,9,100,10.1016/j.electacta.2007.12.051,,"[Charreteur, Fanny; Ruggeri, Stephane; Jaouen, Frederic; Dodelet, J. P.] INRS Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada",,"Fe/N/C catalysts for the reduction of oxygen in PEM fuel cells were prepared by pyrolyzing three series of iron acetate-impregnated developmental carbon blacks at 950 degrees C. The carbon supports used were derived from the N234. N330, and N650 commercial furnace grades. In this Study, we tried to increase the performance of Fe/N/C-based cathode of PEM fuel cells by using the following two approaches: (1) increasing the number of catalytic sites on the carbon black either by optimizing the structural parameters of the pristine carbon Supports or by increasing the initial metal content above 0.2 wt% Fe on the carbon support: (2) increasing the catalyst loading in the cathodic layer of a PEM fuel cell. For (1), we show, on the one hand. that optimizing the structural parameters of the pristine carbon support, in order to increase the number of catalytic sites. has its limits and that these limits have been reached for the present synthesis method of Fe/N/C catalysts. On the other hand, increasing the initial metal Content above 0.2 wt% Fe leads to a decrease in catalytic activity. For (2). it is shown that increasing the catalyst loading per cm(2) of cathode well improves the performance of a cathode based oil Fe/N/C catalysts in the kinetic region of the polarization curve. At lower potentials, a large improvement in the performance of these non-precious metal cathodes would occur if the mass transport properties in these electrodes were significantly increased. (c) 2008 Elsevier Ltd. All rights reserved.",carbon black structure; oxygen reductions; non-noble metal; electrocatalyst; PEFC,OXYGEN REDUCTION CATALYSTS; HEAT-TREATMENT AFFECT; FE-BASED CATALYSTS; C-N; ELECTROCHEMICAL CHARACTERISTICS; NONNOBLE ELECTROCATALYSTS; O-2 REDUCTION; RAMAN; PERFORMANCE; LAYER,carbon black structure;oxygen reductions;non-noble metal;electrocatalyst;PEFC;OXYGEN REDUCTION CATALYSTS;HEAT-TREATMENT AFFECT;FE-BASED CATALYSTS;C-N;ELECTROCHEMICAL CHARACTERISTICS;NONNOBLE ELECTROCATALYSTS;O-2 REDUCTION;RAMAN;PERFORMANCE;LAYER,jaouen@emt.inrs.ca; dodelet@emt.inrs.ca,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",58th Annual Meeting of the International-Society-of-Electrochemisty,"Banff, CANADA","SEP 10-14, 2007",PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article; Proceedings Paper,WoS,Electrochemistry,WOS:000258975400026,2-s2.0-47249153325,Canada,emt.inrs.ca,INRS Energie Mat & Telecommun,"INRS Energie Mat & Telecommun, Canada","Charreteur, Fanny; Ruggeri, Stephane; Jaouen, Frederic; Dodelet, J. P."
"Mazzoli, L., Pedersen, A., Kellner, S., Hunter, R.D., Cai, R., Wang, M., Sivula, K., Haigh, S.J., Barrio, J.",Inducing porosity in xylose-derived FeNC electrocatalysts for alkaline oxygen reduction,2024,Green Chemistry,26,6,,3271,3280,,15,10.1039/d3gc04645a,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85184593851&doi=10.1039%2Fd3gc04645a&partnerID=40&md5=935ac0732c1e155c89224a67adfe00e4,"Department of Chemical Engineering, Imperial College London, London, United Kingdom; Department of Materials, Imperial College London, London, United Kingdom; Department of Materials, The University of Manchester, Manchester, Greater Manchester, United Kingdom; Laboratory for Molecular Engineering of Optoelectronic Nanomaterials, Institut des Sciences et Ingénierie Chimiques, Lausanne, Switzerland","Mazzoli, Lorenzo, Department of Chemical Engineering, Imperial College London, London, United Kingdom; Pedersen, Angus, Department of Chemical Engineering, Imperial College London, London, United Kingdom, Department of Materials, Imperial College London, London, United Kingdom; Kellner, Simon, Department of Chemical Engineering, Imperial College London, London, United Kingdom; Hunter, Robert D., Department of Chemical Engineering, Imperial College London, London, United Kingdom; Cai, Rongsheng, Department of Materials, The University of Manchester, Manchester, Greater Manchester, United Kingdom; Wang, Mengnan, Department of Chemical Engineering, Imperial College London, London, United Kingdom, Department of Materials, Imperial College London, London, United Kingdom; Sivula, Kevin, Laboratory for Molecular Engineering of Optoelectronic Nanomaterials, Institut des Sciences et Ingénierie Chimiques, Lausanne, Switzerland; Haigh, Sarah J., Department of Materials, The University of Manchester, Manchester, Greater Manchester, United Kingdom; Barrio, Jesús, Department of Chemical Engineering, Imperial College London, London, United Kingdom","Iron-nitrogen-carbon (FeNC) electrocatalysts are emerging as a low-cost alternative to Pt-based materials for electrochemical oxygen reduction at the cathode of alkaline exchange membrane hydrogen fuel cells. The valorisation of waste biomass is a sustainable pathway that could allow the large-scale production of such catalysts. By means of hydrothermal carbonization (HTC), a biomass-derived carbohydrate can be converted into a carbonaceous framework, however, the electrocatalytic performance of the metal-nitrogen-carbon electrocatalysts prepared through HTC is suboptimal owing to the lack of microporosity in the highly crosslinked carbon frameworks. In this work, we address this issue by adding polystyrene sulfonate (kayexalate) in the HTC of xylose. Kayexalate's negative charges mitigate particle aggregation, resulting in smaller carbon-based particles, with the O<inf>2</inf> activation leading to a four-fold increase in specific surface area (127 vs. 478 m2 g−1). Subsequent high-temperature pyrolysis in the presence of an N and Fe source leads to an active FeNC. This produces a corresponding increase in the electrocatalytic activity for the oxygen reduction in alkaline media in a rotating disk electrode (1.45 vs. 14.3 A g−1 at 0.8 V vs. RHE) and in a gas diffusion electrode at high current densities (≥2 A cm−2). The sustainable character of the reported catalyst as well as the high electrocatalytic activity at industrially relevant current densities provides a pathway to catalyst design for low-cost cathodes in alkaline exchange membrane fuel cells. © 2024 The Royal Society of Chemistry",,Agglomeration; Carbon; Carbonization; Cathodes; Costs; Diffusion in gases; Electrolysis; Electrolytic reduction; Iron compounds; Nitrogen; Oxygen; Proton exchange membrane fuel cells (PEMFC); Alkalines; Electrocatalytic activity; Electrochemical oxygen reduction; Exchange membranes; Hydrothermal carbonization; Iron nitrogen; Low-costs; Nitrogen-carbon; Oxygen Reduction; ]+ catalyst; Electrocatalysts,Agglomeration;Carbon;Carbonization;Cathodes;Costs;Diffusion in gases;Electrolysis;Electrolytic reduction;Iron compounds;Nitrogen;Oxygen;Proton exchange membrane fuel cells (PEMFC);Alkalines;Electrocatalytic activity;Electrochemical oxygen reduction;Exchange membranes;Hydrothermal carbonization;Iron nitrogen;Low-costs;Nitrogen-carbon;Oxygen Reduction;]+ catalyst;Electrocatalysts,"A. Pedersen; Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom; email: a.pedersen19@imperial.ac.uk; J. Barrio; Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom; email: j.barrio-hermida@imperial.ac.uk",,,,,,Royal Society of Chemistry,14639262,9781613248775,GRCHF,,English,Green Chem.,Article,Scopus,,2-s2.0-85184593851,,United Kingdom;Switzerland,imperial.ac.uk,,,"Mazzoli, L.; Pedersen, A.; Kellner, S.; Hunter, R.D.; Cai, R.; Wang, M.; Sivula, K.; Haigh, S.J.; Barrio, J."
,Influence of carbon dioxide and carbonate on the electrode reactions in alkaline direct methanol fuel cells,2018,,,,,53,54,,0,,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85095778268&partnerID=40&md5=4242581f570fb34c553321b7730689bc,,,"Introduction Direct methanol fuel cells (DMFC) have been among the first fuel cells to be commercialised. The high energy storage capacity and easy handling of the liquid fuels makes the use of DMFC advantageous for applications where a long running time with medium to low power demands is required. Furthermore, the simple and thus robust system design and the typical set-up which keeps the membrane wet for most of the time even after shut-down leads to a high cycle stability. Therefore, DMFC are in particular suitable for applications were random start-up and shut-downs are to be expected like portable power supply, on-board vehicle battery charging or back-up power. Whereas the market for portable fuel cell power systems never really took off outside the military world, battery charging and in particular back-up power are increasing in volume. However, for these markets larger systems in the range of kilowatts are often required. Here the use of today's proton exchange membrane technology based DMFC experiences economical limits due to the need to use platinum based catalyst at rather high loadings. Alkaline anion exchange membrane based DMFC could be an alternative to overcome this issue. However, classic alkaline fuel cells (AFC) are known to be sensitive against carbon dioxide from air. As was shown by Inaba et al. typical anion exchange membranes also suffer from a reduction of conductivity if exposed to carbon dioxide1. In contrast to the situation in AFC the effect was, however, found to be reversible. As the current density at which DMFC typically operate are much lower than those of fuel cells operating on hydrogen, the effect of increased ohmic resistance can also be expected to be less relevant. Much less is known about the effect of CO<inf>2</inf>and carbonate ions on the electrochemical reaction. Vega et al. reported on the effect of CO<inf>2</inf>on the ORR at Pt electrode in KOH electrolyte2. A slight reduction of performance was found. For the alcohol oxidation and the oxygen reduction at non PGM catalyst even less is known. In this study we will report on systematic tests of the methanol oxidation at carbon supported platinum catalyst in KOH and KHCO3 electrolytes as well as the oxygen reduction at commercial PGM-free cathode catalyst K4020 by Acta.. The results will be compared to studies on single cell level. Here tests were performed using also KOH or KHCO3 as supporting electrolyte. Additionally, the effect of dosing CO<inf>2</inf>to the synthetic air feed of the cathode was investigated. Experimental set-up and procedures Catalyst tests were performed using a standard rotating disk electrode set-up from PINE instruments with a glassy carbon disk electrode. The disk was coated with an ink of catalyst power dispersed in a mixture of DI water and 2-propanol with a very small amount of added Nafion®. A platinum foil was used as counter electrode and a HydroFlex® reversible hydrogen electrode by Gaskatel as reference electrode. The used cell was equipped with a double jacked so that heating of the cell was possible. Measurements there conducted between 30 °C and 60 °C. Single cell tests were performed at membrane electrode assemblies consisting of a Fumatech FumaPEM FAA3 electrolyte membrane, an anode GDE made from a Sigracet 10AA GDL coated with Johson & Matthey HiSpec3000 Pt/C catalyst at a platinum loading of 2 mg cm-2and a cathode GDE made from a Freudenberg H32C2 GDL coated with Acta K4020 catalyst at a loading of 5 mg cm-2. Test were performed in a qFC 100-25 cell fixture by balticFuelCells using an Autolab potentiostat as electric load. On the cathode side gas was supplied using mass flow controllers from Bronkhorst for synthetic air and CO<inf>2</inf>. Results The first observation comparing the methanol oxidation at Pt/C catalyst in 0.25 M KOH and 0.25 M KHCO3 solution is that the achievable peek mass activity in the KOH solution is about a factor of 5 higher than in KHCO3 solution. At the same time the peak potential in the KHCO3 electrolyte is shifted towards lower potentials, whereas the onset potentials are comparable. In both cases a pronounced temperature dependence was observed with the mass activity increasing by about a factor 5 if temperature is raised from 30 °C to 60 °C. A further significant difference between the CV in KOH and KHCO3 electrolyte is the presence of a second oxidation wave in the latter. The CV in KHCO3 resembles thus a CV in acidic electrolyte. © Emerging Technologies in Clean Energy 2018 -.All rights reserved.",,Alkaline fuel cells; Carbon dioxide; Carbon dioxide process; Catalyst supports; Cathodes; Charging (batteries); Commerce; Electric loads; Electrochemical electrodes; Electrolytic reduction; Energy storage; Fuel cell power plants; Fuel storage; Gas fuel purification; Hydrogen; Ion exchange membranes; Ions; Membrane technology; Methanol; Methanol fuels; Mobile power plants; Ohmic contacts; Oxidation; Oxygen; Platinum; Potassium hydroxide; Proton exchange membrane fuel cells (PEMFC); Secondary batteries; Solid electrolytes; Springs (components); Temperature distribution; Voltage regulators; Alkaline anion exchange membrane; Alkaline direct methanol fuel cells; Carbon supported platinum catalyst; Electrochemical reactions; Membrane electrode assemblies; Proton exchange membranes; Reversible hydrogen electrodes; Rotating disk electrodes; Direct methanol fuel cells (DMFC),Alkaline fuel cells;Carbon dioxide;Carbon dioxide process;Catalyst supports;Cathodes;Charging (batteries);Commerce;Electric loads;Electrochemical electrodes;Electrolytic reduction;Energy storage;Fuel cell power plants;Fuel storage;Gas fuel purification;Hydrogen;Ion exchange membranes;Ions;Membrane technology;Methanol;Methanol fuels;Mobile power plants;Ohmic contacts;Oxidation;Oxygen;Platinum;Potassium hydroxide;Proton exchange membrane fuel cells (PEMFC);Secondary batteries;Solid electrolytes;Springs (components);Temperature distribution;Voltage regulators;Alkaline anion exchange membrane;Alkaline direct methanol fuel cells;Carbon supported platinum catalyst;Electrochemical reactions;Membrane electrode assemblies;Proton exchange membranes;Reversible hydrogen electrodes;Rotating disk electrodes;Direct methanol fuel cells (DMFC),,,,Emerging Technologies in Clean Energy 2018 - Topical Conference at the 2018 AIChE Spring Meeting and 14th Global Congress on Process Safety,Orlando,2018-04-22 through 2018-04-25,AIChE,,9781510864313,,,English,Emerg. Technol. Clean Energy - Top. Conf. AIChE Spring Meet. Glob. Congr. Process Saf.,Conference paper,Scopus,,2-s2.0-85095778268,,,No email,,,
"Kellner, S., Liu, Z., D'Acierno, F., Pedersen, A., Barrio, J., Heutz, S., Stephens, I.E.L., Favero, S., Titirici, M.M.",Influence of Commercial Ionomers and Membranes on a PGM-Free Catalyst in the Alkaline Oxygen Reduction,2025,ACS Applied Energy Materials,8,6,,3470,3480,,2,10.1021/acsaem.4c02929,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105001069215&doi=10.1021%2Facsaem.4c02929&partnerID=40&md5=8d2ae6a0a6d710f885fb66ce5a454dc2,"Department of Chemical Engineering, Imperial College London, London, United Kingdom; Department of Materials, Imperial College London, London, United Kingdom; Tohoku University, Sendai, Miyagi, Japan","Kellner, Simon, Department of Chemical Engineering, Imperial College London, London, United Kingdom; Liu, Ziyang, Department of Chemical Engineering, Imperial College London, London, United Kingdom; D'Acierno, Francesco, Department of Chemical Engineering, Imperial College London, London, United Kingdom; Pedersen, Angus, Department of Chemical Engineering, Imperial College London, London, United Kingdom; Barrio, Jesús, Department of Chemical Engineering, Imperial College London, London, United Kingdom; Heutz, Sandrine E.M., Department of Materials, Imperial College London, London, United Kingdom; Stephens, Ifan E.L., Department of Materials, Imperial College London, London, United Kingdom; Favero, Silvia, Department of Chemical Engineering, Imperial College London, London, United Kingdom; Titirici, Maria Magdalena, Department of Chemical Engineering, Imperial College London, London, United Kingdom, Tohoku University, Sendai, Miyagi, Japan","Hitherto, research into alkaline exchange membrane fuel cells lacked a commercial benchmark anionomer and membrane, analogous to Nafion in proton-exchange membrane fuel cells. Three commercial alkaline exchange ionomers (AEIs) have been scrutinized for that role in combination with a commercial platinum-group-metal-free Fe-N-C (Pajarito Powder) catalyst for the cathode. The initial rotating disc electrode benchmarking of the Fe-N-C catalyst’s oxygen reduction reaction activity using Nafion in an alkaline electrolyte seems to neglect the restricted oxygen diffusion in the AEIs and is recommended to be complemented by measurements with the same AEI as used in the alkaline exchange membrane fuel cell (AEMFC) testing. Evaluation of the catalyst layer in a gas-diffusion electrode setup offers a way to assess the performance in realistic operating conditions, without the additional complications of device-level water management. Blending of a porous Fe-N-C catalyst with different types of AEI yields catalyst layers with different pore size distributions. The catalyst layer with Piperion retains the highest proportion of the original BET surface area of the Fe-N-C catalyst. The water adsorption capacity is also influenced by the AEI, with Fumion FAA-3 and Piperion having equally high capabilities surpassing Sustainion. Finally, the choice of the membrane influences the ORR performance as well; particularly, the low hydroxide conductivity of Fumion FAA-3 in the room temperature experiments mitigates the ORR performance irrespective of the AEI in the catalyst layer. The best overall performance at high current densities is shown by the Piperion anion exchange ionomer matched with Sustainion X37-50 membrane. © 2025 The Authors. Published by American Chemical Society.",alkaline exchange ionomer; alkaline exchange membrane; Fe−N−C catalyst; fuel cell; gas-diffusion electrode; oxygen reduction reaction; PGM-free catalysts,Alkalinity; Benchmarking; Gas sensing electrodes; Ion exchange membranes; Ionomers; Nafion membranes; Negative ions; Oxygen permeable membranes; Oxygen reduction reaction; Positive ions; Rate constants; Thermal diffusion in gases; Alkaline exchange ionomer; Alkaline exchange membrane; Alkalines; Exchange membranes; Fe−N−C catalyst; Gas diffusion electrodes; PGM-free catalyst; ]+ catalyst; Electrolytic reduction,alkaline exchange ionomer;alkaline exchange membrane;Fe−N−C catalyst;fuel cell;gas-diffusion electrode;oxygen reduction reaction;PGM-free catalysts;Alkalinity;Benchmarking;Gas sensing electrodes;Ion exchange membranes;Ionomers;Nafion membranes;Negative ions;Oxygen permeable membranes;Positive ions;Rate constants;Thermal diffusion in gases;Alkalines;Exchange membranes;Gas diffusion electrodes;PGM-free catalyst;]+ catalyst;Electrolytic reduction,"S. Favero; Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom; email: silvia.favero@icn2.cat; M.-M. Titirici; Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom; email: m.titirici@imperial.ac.uk",,,,,,American Chemical Society,,,,,English,ACS Appl. Ener. Mat.,Article,Scopus,,2-s2.0-105001069215,,United Kingdom;Japan,icn2.cat,,,"Kellner, S.; Liu, Z.; D'Acierno, F.; Pedersen, A.; Barrio, J.; Heutz, S.; Stephens, I.E.L.; Favero, S.; Titirici, M.-M."
"Xu, M., Jin, Z., Xiao, M., Liu, C., Xing, W.",Influence of compression effect on the MEA structure and performance based on M−N–C electrocatalysts for PEMFC,2024,International Journal of Hydrogen Energy,86,,,976,984,,2,10.1016/j.ijhydene.2024.08.435,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85202873191&doi=10.1016%2Fj.ijhydene.2024.08.435&partnerID=40&md5=de69716052f2ff6f33e5af91f5dc56e5,"Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China","Xu, Mingjun, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Jin, Zhao, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Xiao, Meiling, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Liu, Changpeng, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Xing, Wei, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China","The single-atom dispersed active sites and the thicker catalytic layer of metal-nitrogen-carbon (M-N-C) electrocatalysts based membrane electrode assembly (MEA) exhibit notable distinctions from Pt-based MEA, necessitating targeted optimization. This study systematically investigates the influence of compression on both structure and performance of the M-N-C electrocatalysts based MEA. Four compression ratios, ranging from 11.5% to 39.3%, were examined across diverse operational conditions. The variations in impedance across different electrochemical regions are observed, resulting from the superposition of distinct impedance components. It is found that the insufficient compression leads to higher porosity and the formation of cracks between catalytic layer and membrane, adversely impacting internal resistance and proton transport. Increasing compression first acts the catalytic layer, and then gradually acts on the interface, membrane and gas diffusion layer, thereby reducing internal resistance, charge transfer resistances, albeit at the expense of heightened mass transfer resistance. Among these factors, the influence of internal resistance affects significance to total performance. Furthermore, compression influenced mass transfer differently in various layers. For the catalyst layer, the effect was uniform and sustained, while for the gas diffusion layer, it initially remained constant and then experienced a sudden deterioration over a certain extent. Optimal MEA performance is achieved when the compression ratio attains 40 %, which 2.1 times higher than the low compression MEA. This finding emphasizes the necessity for higher compression on M-N-C electrocatalysts based MEA compared to Pt-based MEA. © 2024 Hydrogen Energy Publications LLC",Compression effect; M-N-C electrocatalysts based membrane electrode assembly; Proton exchange membrane fuel cells,Carbon electrodes; Gas permeable membranes; Hydrogen fuels; Kyoto Protocol; Nafion membranes; Platinum; Platinum alloys; Assembly structures; Catalytic layers; Compression effects; Gas diffusion layers; Internal resistance; Membrane electrode assemblies; Metal-nitrogen-carbon electrocatalyst based membrane electrode assembly; Nitrogen-carbon; Proton-exchange membranes fuel cells; Structure and performance; Thermal diffusion in gases,Compression effect;M-N-C electrocatalysts based membrane electrode assembly;Proton exchange membrane fuel cells;Carbon electrodes;Gas permeable membranes;Hydrogen fuels;Kyoto Protocol;Nafion membranes;Platinum;Platinum alloys;Assembly structures;Catalytic layers;Compression effects;Gas diffusion layers;Internal resistance;Membrane electrode assemblies;Metal-nitrogen-carbon electrocatalyst based membrane electrode assembly;Nitrogen-carbon;Proton-exchange membranes fuel cells;Structure and performance;Thermal diffusion in gases,"C. Liu; Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: liuchp@ciac.ac.cn; Z. Jin; Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: zjin@ciac.ac.cn; M. Xiao; Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: mlxiao@ciac.ac.cn; W. Xing; Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: xingwei@ciac.ac.cn",,,,,,Elsevier Ltd,03603199,0080311393,IJHED,,English,Int J Hydrogen Energy,Article,Scopus,,2-s2.0-85202873191,,China,ciac.ac.cn,,,"Xu, M.; Jin, Z.; Xiao, M.; Liu, C.; Xing, W."
"Ahmad Junaidi, N.H., Tan, S.Y., Wong, W.Y., Loh, K.S., Saidur, S., Choo, T.F., Wu, B.",Influence of Fe–N–C morphologies on the oxygen reduction reaction in acidic and alkaline media,2023,Asia-Pacific Journal of Chemical Engineering,18,6,e2950,,,,6,10.1002/apj.2950,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85165103016&doi=10.1002%2Fapj.2950&partnerID=40&md5=b37977c41e3af5892e3b791b468777ba,"Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia; Research Centre for Nano-Materials and Energy Technology, Sunway University, Sunway City, Selangor, Malaysia; Department of Engineering, Lancaster University, Lancaster, Lancashire, United Kingdom; Agensi Nuklear Malaysia, Bangi, Selangor, Malaysia; Ltd., Ningbo, China","Ahmad Junaidi, Norhamizah Hazirah, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia; Tan, Sue Ying, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia; Wong, W. Y., Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia; Loh, Kee Shyuan, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia; Saidur, Rahman, Research Centre for Nano-Materials and Energy Technology, Sunway University, Sunway City, Selangor, Malaysia, Department of Engineering, Lancaster University, Lancaster, Lancashire, United Kingdom; Choo, Thye Foo, Agensi Nuklear Malaysia, Bangi, Selangor, Malaysia; Wu, Bo, Ltd., Ningbo, China","The development of nonnoble metal oxygen reduction reaction (ORR) catalysts for fuel cells has been motivated by the high cost and limited supply of noble metals, as well as the desire to improve the performance and durability of this type of energy conversion device. In this study, nonnoble Fe–N–C catalyst was synthesized using a zeolitic imidazole framework (ZIF-8), poly (aniline), and 10,10′-dibromo-9,9′-bianthry as precursors to produce Fe–N–C with hollow sphere (HS), amorphous bulky structure (B), and sheet-like thin sheet (N) structure. The Fe–N–C catalyst was analysed in terms of their shape, crystal structure, pore characteristics, and elemental composition. Among all the Fe–N–C catalysts, Fe–N–C_HS had the highest total surface area, followed by Fe–N–C_B and Fe–N–C_N. To evaluate their ORR catalytic activity, a half-cell electrochemical experiment with.1 M KOH and.1 M HClO<inf>4</inf> as the alkaline and acidic electrolytes was conducted. This study revealed that Fe–N–C_HS exhibited the highest onset potential but the Fe–N–C_B has the highest limiting current density in alkaline medium; meanwhile, in acidic media, Fe–N–C_HS shows the best ORR performance with the highest onset potential and limiting current. This highly porous Fe–N–C_HS catalyst also demonstrated active site activation and excellent stability compared with the other samples as well as commercial Pt/C in acidic electrolyte, which suggests its potential for application in proton exchange membrane fuel cells (PEMFCs). © 2023 Curtin University and John Wiley & Sons Ltd.",catalyst stability; catalytic activity; Fe–N–C; morphology; oxygen reduction reaction,Chlorine compounds; Crystal structure; Electrolytes; Electrolytic reduction; Morphology; Oxygen supply; Potassium hydroxide; Proton exchange membrane fuel cells (PEMFC); Acidic electrolytes; Acidic media; Alkaline media; Catalyst stability; Fe–N–C; High costs; Hollow sphere; Onset potential; Oxygen reduction reaction; ]+ catalyst; Catalyst activity,catalyst stability;catalytic activity;Fe–N–C;morphology;oxygen reduction reaction;Chlorine compounds;Crystal structure;Electrolytes;Electrolytic reduction;Oxygen supply;Potassium hydroxide;Proton exchange membrane fuel cells (PEMFC);Acidic electrolytes;Acidic media;Alkaline media;High costs;Hollow sphere;Onset potential;]+ catalyst;Catalyst activity,"W.Y. Wong; Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, Malaysia; email: waiyin.wong@ukm.edu.my",,,,,,John Wiley and Sons Ltd,19322135,,,,English,Asia-Pac. J. Chem. Eng.,Article,Scopus,,2-s2.0-85165103016,,Malaysia;United Kingdom;China,ukm.edu.my,,,"Ahmad Junaidi, N.H.; Tan, S.Y.; Wong, W.Y.; Loh, K.S.; Saidur, S.; Choo, T.F.; Wu, B."
"Li, L., Fu, C., Shen, S., Jiang, F., Wei, G., Zhang, J.",Influence of Fe on electrocatalytic activity of iron-nitrogen-doped carbon materials toward oxygen reduction reaction,2022,Frontiers in Energy,16,5,,812,821,,9,10.1007/s11708-020-0669-0,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85086467285&doi=10.1007%2Fs11708-020-0669-0&partnerID=40&md5=d915a8d0864097655b206fd28dab1798,"School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; SJTU – Paris Elite Institute of Technology, Shanghai, China","Li, Lin, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; Fu, Cehuang, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; Shen, Shuiyuan Yun, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; Jiang, Fangling, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; Wei, Guanghua, SJTU – Paris Elite Institute of Technology, Shanghai, China; Zhang, Junliang, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China","The development of highly active nitrogen-doped carbon-based transition metal (M-N-C) compounds for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs) greatly helps reduce fuel cell cost, thus rapidly promoting their commercial applications. Among different M-N-C electro-catalysts, the series of Fe-N-C materials are highly favored because of their high ORR activity. However, there remains a debate on the effect of Fe, and rare investigations focus on the influence of Fe addition in the second heat treatment usually performed after acid leaching in the catalyst synthesis. It is thus very critical to explore the influences of Fe on the ORR electrocatalytic activity, which will, in turn, guide the design of Fe-N-C materials with enhanced performance. Herein, a series of Fe-N-C electrocatalysts are synthesize and the influence of Fe on the ORR activity are speculated both experimentally and theoretically. It is deduced that the active site lies in the structure of Fe-N<inf>4</inf>, accompanied with the addition of appropriate Fe, and the number of active sites increases without the occurrence of agglomeration particles. Moreover, it is speculated that Fe plays an important role in stabilizing N as well as constituting active sites in the second pyrolyzing process. © 2020, Higher Education Press.",active sites; Fe addition; Fe-N-C; oxygen reduction reaction; second heat treatment,Carbon; Doping (additives); Electrocatalysts; Electrolytic reduction; Iron; Oxygen; Proton exchange membrane fuel cells (PEMFC); Active site; Carbon material; Electrocatalytic activity; Fe additions; Fe-N-C; Iron nitrogen; Nitrogen-doped carbons; Oxygen reduction reaction; Reaction activity; Second heat treatment; Heat treatment,active sites;Fe addition;Fe-N-C;oxygen reduction reaction;second heat treatment;Carbon;Doping (additives);Electrocatalysts;Electrolytic reduction;Iron;Oxygen;Proton exchange membrane fuel cells (PEMFC);Active site;Carbon material;Electrocatalytic activity;Fe additions;Iron nitrogen;Nitrogen-doped carbons;Reaction activity;Heat treatment,"J. Zhang; Institute of Fuel Cells, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; email: junliang.zhang@sjtu.edu.cn",,,,,,Higher Education Press Limited Company,20951701,,,,English,Front. Energy,Article,Scopus,,2-s2.0-85086467285,,China,sjtu.edu.cn,,,"Li, L.; Fu, C.; Shen, S.; Jiang, F.; Wei, G.; Zhang, J."
"Zhang, H.J., Jiang, Q.Z., Sun, L., Yuan, X.X., Ma, Z.F.",Influence of heat treatment on the activity and structure of CoTETA/C catalysts for oxygen reduction reaction,2010,Electrochimica Acta,55,3,,1107,1112,,33,10.1016/j.electacta.2009.09.085,https://www.scopus.com/inward/record.uri?eid=2-s2.0-70549113144&doi=10.1016%2Fj.electacta.2009.09.085&partnerID=40&md5=c5c9b96722e3d4338ce5b8e264cc669f,"Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China; School of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu, China","Zhang, Huijuan, Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China; Jiang, Qizhong, Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China; Sun, Liangliang, School of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu, China; Yuan, Xianxia, Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China; Ma, Zi Feng, Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China","The influence of heat treatment on the improvement of the catalytic activity of CoTETA/C catalysts is investigated. These non-precious metal oxygen reduction catalysts are prepared from carbon-supported cobalt triethylenetetramine (CoTETA/C) and heat treated in the temperature interval from 500 to 1000 °C in Ar atmosphere. Electrochemical characteristics are demonstrated in oxygen-saturated acid electrolyte by rotating disk electrode, cyclic voltammetry, as well as single fuel cell tests. The results show that the effect of heat treatment is important on the catalytic activity of CoTETA/C catalysts for the ORR and a maximum catalytic activity is obtained after heat treatment at 800 °C. The ORR reaction mechanism on the catalysts heat treated at 700, 800 and 900 °C is mainly through a 4e reaction path, while a 2e reaction is dominant on the catalysts heat treated at 500, 600 and 1000 °C. Tafel slopes of the CoTETA/C catalysts are all around -200 mV/dec. X-ray absorption measurements reveal that the CoN<inf>4</inf> centers are no longer detected after heat treatment. XRD results clearly confirm the formation of nanometallic α-Co with different sizes aggregated. A possible interpretation of the catalytic active sites is also discussed. © 2009 Elsevier Ltd. All rights reserved.",CoTETA/C; Heat treatment; Non-precious metal catalyst; Oxygen reduction reaction; PEMFCs,After-heat treatment; Catalytic active sites; Catalytic activity; Different sizes; Electrochemical characteristics; Non-precious metal catalyst; Oxygen reduction catalysts; Oxygen reduction reaction; Precious metal catalysts; Reaction mechanism; Reaction paths; Rotating disk electrodes; Saturated acid; Single fuels; Tafel slopes; Temperature intervals; Triethylenetetramine; XRD; Catalysis; Cobalt; Cyclic voltammetry; Electrochemical sensors; Electrolytic reduction; Heat treatment; Oxygen; Precious metals; Proton exchange membrane fuel cells (PEMFC); Rotating disks; Sulfur compounds; Thermal effects; Catalyst activity,CoTETA/C;Heat treatment;Non-precious metal catalyst;Oxygen reduction reaction;PEMFCs;After-heat treatment;Catalytic active sites;Catalytic activity;Different sizes;Electrochemical characteristics;Oxygen reduction catalysts;Precious metal catalysts;Reaction mechanism;Reaction paths;Rotating disk electrodes;Saturated acid;Single fuels;Tafel slopes;Temperature intervals;Triethylenetetramine;XRD;Catalysis;Cobalt;Cyclic voltammetry;Electrochemical sensors;Electrolytic reduction;Oxygen;Precious metals;Proton exchange membrane fuel cells (PEMFC);Rotating disks;Sulfur compounds;Thermal effects;Catalyst activity,"Q.-Z. Jiang; Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; email: qzjiang@sjtu.edu.cn",,,,,,,00134686,,ELCAA,,English,Electrochim Acta,Article,Scopus,,2-s2.0-70549113144,,China,sjtu.edu.cn,,,"Zhang, H.-J.; Jiang, Q.-Z.; Sun, L.; Yuan, X.-X.; Ma, Z.-F."
"Zierdt, T., Bin Mamtaz, M.R., Eek, T., Muller-Hulstede, J., Rehse, S., Meyer, Q., Schonvogel, D., Wagner, P., Zhao, C., Wark, M., Friedrich, K.A.",Influence of Ink Composition and Drying Technique on the Performance and Stability of Fe-N-C-Based High-Temperature Proton Exchange Membrane Fuel Cells,2025,CHEMSUSCHEM,18,16,,,,11,1,10.1002/cssc.202500905,,"[Zierdt, Tanja; Eek, Tom; Mueller-Huelstede, Julia; Rehse, Steffen; Schonvogel, Dana; Wagner, Peter] German Aerosp Ctr DLR, Inst Engn Thermodynam, Carl von Ossietzky Str 15, D-26129 Oldenburg, Germany; [Zierdt, Tanja; Friedrich, K. Andreas] Univ Stuttgart, Inst Bldg Energet Thermotechnol & Energy Storage I, Pfaffenwaldring 31, D-70569 Stuttgart, Germany; [Bin Mamtaz, Md Raziun; Meyer, Quentin; Zhao, Chuan] Univ New South Wales, Sch Chem, Sydney, NSW 2052, Australia; [Eek, Tom; Wark, Michael] Carl von Ossietzky Univ Oldenburg, Inst Chem, Carl von Ossietzky Str 9-11, D-26129 Oldenburg, Germany; [Friedrich, K. Andreas] German Aerosp Ctr DLR, Inst Engn Thermodynam, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germany",,"Fe-N-C catalysts have emerged as a potentially cost-effective alternative to Pt-based catalysts in high-temperature polymer electrolyte membrane fuel cell cathodes. However, the optimal design and deposition method of the Pt-free catalyst layer remain unclear. Herein, the effect of conventional oven drying compared with freeze-drying on the performance of commercial Fe-N-C catalyst layers is investigated. The gas diffusion electrodes are fabricated by doctor blade coating. Freezing the wet catalyst layer at -26 degrees C and subsequent sublimation of the solvents leads to a 45 % increase in mass-normalized peak power density compared to the conventional oven drying. This is attributed to a templating mechanism of the solvents, resulting in a thicker catalyst layer and improved acid retention, which enables optimal reactant transport. In contrast, freeze-drying with liquid nitrogen negatively impacts the catalyst morphology, leading to reduced porosity and performance. During 100 h of operation, the performance decreases by a similar magnitude, regardless of the fabrication method used. Operando electrochemical impedance spectroscopy with the distribution of relaxation times shows no catalyst deactivation through the fabrication methods. The results highlight the importance of optimizing catalyst layer fabrication methods for Fe-N-C catalysts to achieve improved performance in fuel cell applications.",catalyst layer fabrication; electrocatalyst; Fe-N-C; freeze-drying; high-temperature proton exchange membrane fuel cells,PGM-FREE; CATALYSTS; PLATINUM; ELECTROCATALYSTS; ADSORPTION,catalyst layer fabrication;electrocatalyst;Fe-N-C;freeze-drying;high-temperature proton exchange membrane fuel cells;PGM-FREE;CATALYSTS;PLATINUM;ELECTROCATALYSTS;ADSORPTION,tanja.zierdt@dlr.de,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1864-5631,,,40519118,English,CHEMSUSCHEM,Article,WoS,Chemistry; Science & Technology - Other Topics,WOS:001527932300001,2-s2.0-105010477329,Germany;Australia,dlr.de,German Aerosp Ctr DLR;Univ Stuttgart;Univ New South Wales;Carl von Ossietzky Univ Oldenburg,"German Aerosp Ctr DLR, Germany;Univ Stuttgart, Germany;Univ New South Wales, Australia;Carl von Ossietzky Univ Oldenburg, Germany","Zierdt, Tanja; Bin Mamtaz, Md Raziun; Eek, Tom; Mueller-Huelstede, Julia; Rehse, Steffen; Meyer, Quentin; Schonvogel, Dana; Wagner, Peter; Zhao, Chuan; Wark, Michael; Friedrich, K. Andreas"
"Pham, N.N.T., Nguyen, V.T., Guo, H., Lee, S.G.",Influence of phosphorus-doped bilayer graphene configuration on the oxygen reduction reaction in acidic solution,2023,CARBON,210,,118012,,,9,6,10.1016/j.carbon.2023.118012,,"[Pham, Nguyet N. T.; Nguyen, Van Kieu Thuy] Vietnam Natl Univ, Univ Sci, 227 Nguyen Van Cu, Ho Chi Minh City 700000, Vietnam; [Guo, Hengquan; Lee, Seung Geol] Pusan Natl Univ, Sch Chem Engn, 2,Busandaehak Ro 63 Beon Gil, Busan 46241, South Korea; [Lee, Seung Geol] Pusan Natl Univ, Sch Organ Mat Sci & Engn, 2,Busandaehak Ro 63 Beon Gil, Busan 46241, South Korea",,"The challenges posed by global warming and climate change can be solved by utilizing alternative and renewable energy sources to provide efficient and ecofriendly energy for sustainable energy conversion. Fuel cells, especially polymer electrolyte membrane fuel cells (PEMFCs), can convert air pollution via chemical reactions to generate electricity and water and are considered next-generation technologies for the green economy. The oxygen reduction reaction (ORR) at the catalyst layer plays an important role in determining a fuel cell's price and electrochemical performance. Recently, non-platinum-group metals (non-PGMs) have emerged as promising low-cost and high-performance catalysts for PEMFCs. This study investigates the electronic properties and the electrocatalytic activity of a single P-doped monovacancy (PC3-BLG) and divacancy (PC4-BLG) of an AB-bilayer graphene in a sulfuric acid solution. The results show that the PC3-BLG exhibits greater stability and better electrocatalytic activity than the PC4-BLG. For the PC3-BLGs, an indirect energy gap of similar to 0.46 eV is predicted, suggesting a transformation from a half-metallic to a small-bandgap semiconductor, whereas the PC4-BLG is predicted to be a p-type semiconductor. An activation energy of 0.54 eV was found for the PC3-BLG, where the rate-limiting step in the ORR is the formation of a second H2O molecule, indicating that phosphorus-doped monovacancy at the hollow site of bilayer graphene (PC3-BLG) is a promising non-PGM alternative to Pt/C catalysts under acidic conditions. These points suggest potential strategies for including carbon-allotrope-based materials in the design of efficient non-PGM catalysts for the ORR.",Polymer electrolyte membrane fuel cell; Phosphorus doping; Bilayer graphene; Oxygen reduction reaction; Density functional theory,METAL-FREE ELECTROCATALYSTS; TOTAL-ENERGY CALCULATIONS; ACTIVE-SITES; CATALYSTS; CARBON; PERFORMANCE; MECHANISMS; GRAPHITE; NITROGEN; PROGRESS,Polymer electrolyte membrane fuel cell;Phosphorus doping;Bilayer graphene;Oxygen reduction reaction;Density functional theory;METAL-FREE ELECTROCATALYSTS;TOTAL-ENERGY CALCULATIONS;ACTIVE-SITES;CATALYSTS;CARBON;PERFORMANCE;MECHANISMS;GRAPHITE;NITROGEN;PROGRESS,seunggeol.lee@pusan.ac.kr,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0008-6223,,,,English,CARBON,Article,WoS,Chemistry; Materials Science,WOS:001000609300001,2-s2.0-85156265522,Vietnam;South Korea,pusan.ac.kr,Vietnam Natl Univ;Pusan Natl Univ,"Vietnam Natl Univ, Vietnam;Pusan Natl Univ, South Korea","Pham, Nguyet N. T.; Nguyen, Van Kieu Thuy; Guo, Hengquan; Lee, Seung Geol"
"Wang, Y.L., Larsen, M.J., Rojas, S., Sougrati, M.T., Jaouen, F., Ferrer, P., Gianolio, D., Berthon-Fabry, S.",Influence of the synthesis parameters on the proton exchange membrane fuel cells performance of Fe-N-C aerogel catalysts,2021,JOURNAL OF POWER SOURCES,514,,230561,,,12,24,10.1016/j.jpowsour.2021.230561,,"[Wang, Youling; Berthon-Fabry, Sandrine] PSL Univ, MINES ParisTech, Ctr Proc Energies Renouvelables & Syst Energet PE, CS 10207 Rue Claude Daunesse, F-06904 Sophia Antipolis, France; [Larsen, Mikkel J.] IRD Fuel Cells AS, Emil Neckelmanns Vej 15 A&B, DK-5220 Odense SO, Denmark; [Rojas, Sergio] CSIC, Inst Catalisias & Petroleoquimca, Grp Energia & Quim Sostenibles, Marie Curie 2, Madrid 28049, Spain; [Sougrati, Moulay-Tahar; Jaouen, Frederic] Univ Montpellier, ICGM, CNRS, ENSCM, Montpellier, France; [Ferrer, Pilar; Gianolio, Diego] Diamond Light Source, Harwell Sci & Innovat Campus, Didcot OX11 0DE, Oxon, England",,"Fe-N-C aerogel catalysts were prepared by sol-gel polycondensation of resorcinol, melamine and formaldehyde precursors in the presence of FeCl3 salt, followed by supercritical drying and thermal treatments. The effect of the mass ratio of precursors on the microstructure, iron speciation and oxygen reduction reaction (ORR) performance of the Fe-N-C aerogels was investigated by N-2 sorption, scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Mossbauer spectroscopy, X-ray absorption spectroscopy, CO chemisorption and rotating disk electrode in acidic medium. The best ORR performance (activity and mass transport) was obtained by an optimum balance between pore structure and active Fe-Nx species. Through acid washing, the durability of the catalyst was further improved by eliminating unstable and inactive species, particularly iron nanoparticles and iron carbide. From the CO chemisorption and turnover-frequency value, the surface sites were comparable with the highest values reported in literature. Finally, Fe-N-C aerogel catalyst was implemented a in membrane-electrode assembly with an active area of 25 cm(2) and tested in single cell, emphasizing the importance of the ink formulation on the performance.",Non-precious metal catalyst; Carbon aerogel; Acidic media; Oxygen reduction reaction; PEMFCs,OXYGEN-REDUCTION REACTION; ACTIVE-SITES; CARBON AEROGELS; IRON; ELECTROCATALYSTS; IDENTIFICATION; PROGRESS; DENSITY,Non-precious metal catalyst;Carbon aerogel;Acidic media;Oxygen reduction reaction;PEMFCs;OXYGEN-REDUCTION REACTION;ACTIVE-SITES;CARBON AEROGELS;IRON;ELECTROCATALYSTS;IDENTIFICATION;PROGRESS;DENSITY,sandrine.berthon-fabry@mines-paristech.fr,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:000707635400002,2-s2.0-85116034217,France;Denmark;Spain;United Kingdom,mines-paristech.fr,PSL Univ;IRD Fuel Cells AS;CSIC;Univ Montpellier;Diamond Light Source,"PSL Univ, France;IRD Fuel Cells AS, Denmark;CSIC, Spain;Univ Montpellier, France;Diamond Light Source, United Kingdom","Wang, Youling; Larsen, Mikkel J.; Rojas, Sergio; Sougrati, Moulay-Tahar; Jaouen, Frederic; Ferrer, Pilar; Gianolio, Diego; Berthon-Fabry, Sandrine"
"Yang, Z., Yang, S., Tang, Y., Wang, G., Pang, H., Yu, F.",Inhibiting demetalation of Zn[sbnd]N[sbnd]C via bimetallic CoZn alloy for an efficient and durable oxygen reduction reaction,2025,Journal of Colloid and Interface Science,689,,137276,,,,7,10.1016/j.jcis.2025.137276,https://www.scopus.com/inward/record.uri?eid=2-s2.0-86000564250&doi=10.1016%2Fj.jcis.2025.137276&partnerID=40&md5=3f5b60cf14f9ffcdd0ca7f1e7cd8e954,"School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang, China; School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu, China","Yang, Zhen, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang, China; Yang, Shouhua, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang, China; Tang, Ying, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang, China; Wang, Gang, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang, China; Pang, Huan, School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu, China; Yu, Feng, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang, China","Inhibition of demetalation due to electrochemical dissolution of metal active centers is a major challenge for the real-world commercialization of transition metals and nitrogen co-doped carbon (M[sbnd]N[sbnd]C) material catalysts. This research utilized a microchannel reactor to synthesize zeolitic imidazolate framework-8@zeolitic imidazolate framework-67, resulting in a CoZn/Zn[sbnd]N[sbnd]C material produced through a core–shell pyrolysis strategy. Direct synergistic interaction of CoZn alloy nanoparticles and Zn[sbnd]N[sbnd]C improves the activity and durability of the oxygen reduction reaction. In proton-exchange membrane fuel cell tests, the CoZn/Zn[sbnd]N[sbnd]C achieved a peak power density of 380.1 mW/cm2. Furthermore, it demonstrated excellent stability in Zn–air battery charge/discharge cycles, lasting up to 480 h. Experimental tests and density functional theory calculations confirmed the presence of strong interactions between the CoZn alloy and Zn[sbnd]N[sbnd]C, which could inhibit demetalation by strengthening the Zn[sbnd]N bond. Furthermore, a moderate rise in the d-band center optimized the adsorption and desorption capacities of oxygen-containing intermediates (*O, *OH, and *OOH). Overall, this research presents a new strategy based on interactions between alloy nanoparticles and single atoms. © 2025 Elsevier Inc.",Alloy nanoparticles; Metal–organic framework; Microchannel reactor; Oxygen reduction reaction; Single-atom catalysts,Bioremediation; Electrolytic reduction; Oxygen reduction reaction; Rate constants; Reaction intermediates; Zinc air batteries; Alloy nanoparticle; Bimetallics; Demetalation; Electrochemical dissolution; Metalorganic frameworks (MOFs); Micro channel reactors; Single-atom catalyst; Single-atoms; ]+ catalyst; Zinc alloys; alloy; carbon; imidazole derivative; metal alloy nanoparticle; metal organic framework; nitrogen; oxygen; proton; transition element; zeolite; zinc; adsorption; Article; carbonization; catalyst; catalytic efficiency; chemical bond; chemical interaction; chemical reaction; current density; demetalation; density functional theory; desorption; electrocatalysis; electrochemical analysis; energy consumption; extended X ray absorption fine structure spectroscopy; pyrolysis; reduction (chemistry); renewable energy; room temperature; scanning electron microscopy; surface property; synthesis; X ray absorption near edge structure spectroscopy; X ray photoemission spectroscopy; article; atom; controlled study; dissolution; fuel; membrane; pharmaceutics,Alloy nanoparticles;Metal–organic framework;Microchannel reactor;Oxygen reduction reaction;Single-atom catalysts;Bioremediation;Electrolytic reduction;Rate constants;Reaction intermediates;Zinc air batteries;Alloy nanoparticle;Bimetallics;Demetalation;Electrochemical dissolution;Metalorganic frameworks (MOFs);Micro channel reactors;Single-atom catalyst;Single-atoms;]+ catalyst;Zinc alloys;alloy;carbon;imidazole derivative;metal alloy nanoparticle;metal organic framework;nitrogen;oxygen;proton;transition element;zeolite;zinc;adsorption;Article;carbonization;catalyst;catalytic efficiency;chemical bond;chemical interaction;chemical reaction;current density;density functional theory;desorption;electrocatalysis;electrochemical analysis;energy consumption;extended X ray absorption fine structure spectroscopy;pyrolysis;reduction (chemistry);renewable energy;room temperature;scanning electron microscopy;surface property;synthesis;X ray absorption near edge structure spectroscopy;X ray photoemission spectroscopy;atom;controlled study;dissolution;fuel;membrane;pharmaceutics,"H. Pang; School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu, 225009, China; email: panghuan@yzu.edu.cn",,,,,,Academic Press Inc.,00219797,,JCISA,40068534,English,J. Colloid Interface Sci.,Article,Scopus,,2-s2.0-86000564250,,China,yzu.edu.cn,,,"Yang, Z.; Yang, S.; Tang, Y.; Wang, G.; Pang, H.; Yu, F."
"Huang, C., Wang, F., Chen, X., Li, J., Shao, M., Wei, Z.",Innovative strategies for designing and constructing efficient fuel cell electrocatalysts,2025,Chemical Communications,61,13,,2658,2683,,8,10.1039/d4cc05928j,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85215830583&doi=10.1039%2Fd4cc05928j&partnerID=40&md5=5b1843824aab49f5d75bd29cb3d57b9e,"Chongqing University, Chongqing, China; Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong","Huang, Chengming, Chongqing University, Chongqing, China; Wang, Fangzheng, Chongqing University, Chongqing, China; Chen, Xia, Chongqing University, Chongqing, China; Li, Jing, Chongqing University, Chongqing, China; Shao, Minhua, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Wei, Zidong, Chongqing University, Chongqing, China","Polymer electrolyte membrane fuel cells (PEMFCs) are one of the most promising energy conversion devices due to their high efficiency and zero emission; however, two major challenges, high cost and short lifetime, have been hindering the commercialization of fuel cells. Achieving low-Pt or non-precious metal oxygen reduction reaction (ORR) electrocatalysts is one of the main research ideas in this field. In this review, the degradation mechanism of Pt-based catalysts is firstly explained and elucidated, and then five strategies are suggested for the reduction of Pt usage without loss of activity and durability: modulation of metal–support interactions, optimization of local ionomers and mass transport, modulation of composition, modulation of structure, and multi-site synergistic effects. For carbon-based non-precious metal catalysts, the problems and challenges faced by heteroatom/transition-metal doped carbon-based catalysts are discussed, and several strategies to improve the activity of heteroatom/transition-metal doped carbon catalysts are suggested. Particularly, an innovative quantum well catalyst structure reported quite recently is presented which may open up new prospects for the development of fuel cell technology. Finally, this review concludes with a brief conclusion and prospects for future development of low-Pt and non-precious metal fuel cell electrocatalysts. © The Royal Society of Chemistry 2025.",,Bioremediation; Electrolysis; Electrolytes; Energy efficiency; Ionomers; Palladium; Palladium alloys; Palladium compounds; Platinum; Platinum alloys; Cell-be; Cell/B.E; Cell/BE; Doped carbons; Heteroatoms; Innovative strategies; Membrane fuel cells; Metal-doped; Non-precious metals; Polymer electrolyte membranes; Electrolytic reduction; cyclohexanol; carbon; electrolyte; oxygen; polymer; transition element; Article; attenuated total reflectance Fourier transform infrared spectroscopy; biodegradation; bioleaching; carbon heteroatom cross coupling; carbonization; catalyst; crystal structure; doping; electric conductivity; electrochemical analysis; electron transport; elemental analysis; energy conversion; fuel cell electrocatalyst; impedance spectroscopy; Non-metallic heteroatom doping; nonhuman; oxidation reduction reaction; particle size; proton nuclear magnetic resonance; pyrolysis; spectroscopy; static electricity; synergistic effect; temperature; Transition metal doping; transmission electron microscopy; voltammetry; controlled study; degradation; drug combination; fuel; pharmaceutics; review,Bioremediation;Electrolysis;Electrolytes;Energy efficiency;Ionomers;Palladium;Palladium alloys;Palladium compounds;Platinum;Platinum alloys;Cell-be;Cell/B.E;Cell/BE;Doped carbons;Heteroatoms;Innovative strategies;Membrane fuel cells;Metal-doped;Non-precious metals;Polymer electrolyte membranes;Electrolytic reduction;cyclohexanol;carbon;electrolyte;oxygen;polymer;transition element;Article;attenuated total reflectance Fourier transform infrared spectroscopy;biodegradation;bioleaching;carbon heteroatom cross coupling;carbonization;catalyst;crystal structure;doping;electric conductivity;electrochemical analysis;electron transport;elemental analysis;energy conversion;fuel cell electrocatalyst;impedance spectroscopy;Non-metallic heteroatom doping;nonhuman;oxidation reduction reaction;particle size;proton nuclear magnetic resonance;pyrolysis;spectroscopy;static electricity;synergistic effect;temperature;Transition metal doping;transmission electron microscopy;voltammetry;controlled study;degradation;drug combination;fuel;pharmaceutics;review,"J. Li; School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 401331, China; email: lijing@cqu.edu.cn; M. Shao; Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Kowloon, 999077, Hong Kong; email: kemshao@ust.hk; Z. Wei; School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 401331, China; email: zdwei@cqu.edu.cn",,,,,,Royal Society of Chemistry,13597345,,CHCOF,39812130,English,Chem. Commun.,Article,Scopus,,2-s2.0-85215830583,,China;Hong Kong,cqu.edu.cn,,,"Huang, C.; Wang, F.; Chen, X.; Li, J.; Shao, M.; Wei, Z."
"Yi, S.Y., Choi, E., Jang, H.Y., Lee, S., Park, J., Choi, D., Jang, Y., Kang, H., Back, S., Jang, S., Lee, J.",Insight into Defect Engineering of Atomically Dispersed Iron Electrocatalysts for High-Performance Proton Exchange Membrane Fuel Cell,2023,ADVANCED MATERIALS,35,46,,,,13,32,10.1002/adma.202302666,,"[Yi, Seung Yeop; Park, Jinkyu; Choi, Daeeun; Jang, Yeju; Lee, Jinwoo] Korea Adv Inst Sci & Technol KAIST, Dept Chem & Biomol Engn, 291 Daehak Ro, Daejeon 34141, South Korea; [Choi, Eunho; Kang, Hojin; Jang, Segeun] Kookmin Natl Univ, Sch Mech Engn, Seoul 02707, South Korea; [Jang, Ho Yeon; Back, Seoin] Sogang Univ, Inst Emergent Mat, Dept Chem & Biomol Engn, Seoul 04107, South Korea; [Lee, Seonggyu] Kumoh Natl Inst Technol KIT, Dept Chem Engn, 61 Daehak Ro, Gumi 39177, South Korea; [Lee, Seonggyu] Kumoh Natl Inst Technol KIT, Dept Energy Engn Convergence, 61 Daehak Ro, Gumi 39177, Gyeongbuk, South Korea",,"Atomically dispersed and nitrogen coordinated iron catalysts (Fe-NCs) demonstrate potential as alternatives to platinum-group metal (PGM) catalysts in oxygen reduction reaction (ORR). However, in the context of practical proton exchange membrane fuel cell (PEMFC) applications, the membrane electrode assembly (MEA) performances of Fe-NCs remain unsatisfactory. Herein, improved MEA performance is achieved by tuning the local environment of the Fe-NC catalysts through defect engineering. Zeolitic imidazolate framework (ZIF)-derived nitrogen-doped carbon with additional CO2 activation is employed to construct atomically dispersed iron sites with a controlled defect number. The Fe-NC species with the optimal number of defect sites exhibit excellent ORR performance with a high half-wave potential of 0.83 V in 0.5 M H2SO4. Variation in the number of defects allows for fine-tuning of the reaction intermediate binding energies by changing the contribution of the Fe d-orbitals, thereby optimizing the ORR activity. The MEA based on a defect-engineered Fe-NC catalyst is found to exhibit a remarkable peak power density of 1.1 W cm-2 in an H2/O2 fuel cell, and 0.67 W cm-2 in an H2/air fuel cell, rendering it one of the most active atomically dispersed catalyst materials at the MEA level. The intrinsic activity of the atomically dispersed iron catalyst is controlled by defect fine-tuning to achieve remarkable electrocatalytic performance. The defects in the carbon plane modulate the valence and spin states of the Fe centers in Fe-N4. The change in the atomic and electronic structures of Fe-N4 leads to a superior MEA performance by optimizing the adsorption of oxygen intermediates.image",atomically dispersed catalysts; defects; oxygen reduction reactions; proton exchange membrane fuel cells,OXYGEN REDUCTION REACTION; N-C CATALYSTS; ACTIVE-SITES; CATHODE CATALYST; METAL-CATALYSTS; SPIN-STATE; DURABILITY; FE/N/C,atomically dispersed catalysts;defects;oxygen reduction reactions;proton exchange membrane fuel cells;OXYGEN REDUCTION REACTION;N-C CATALYSTS;ACTIVE-SITES;CATHODE CATALYST;METAL-CATALYSTS;SPIN-STATE;DURABILITY;FE/N/C,sback@sogang.ac.kr; sjang@kookmin.ac.kr; jwlee1@kaist.ac.kr,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,0935-9648,,,37548180,English,ADV MATER,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:001079475800001,,South Korea,sogang.ac.kr,Korea Adv Inst Sci & Technol KAIST;Kookmin Natl Univ;Sogang Univ;Kumoh Natl Inst Technol KIT,"Korea Adv Inst Sci & Technol KAIST, South Korea;Kookmin Natl Univ, South Korea;Sogang Univ, South Korea;Kumoh Natl Inst Technol KIT, South Korea","Yi, Seung Yeop; Choi, Eunho; Jang, Ho Yeon; Lee, Seonggyu; Park, Jinkyu; Choi, Daeeun; Jang, Yeju; Kang, Hojin; Back, Seoin; Jang, Segeun; Lee, Jinwoo"
"Chen, J.R., Yan, X.H., Fu, C.H., Feng, Y., Lin, C., Li, X.L., Shen, S.Y., Ke, C.C., Zhang, J.L.",Insight into the Rapid Degradation Behavior of Nonprecious Metal Fe-N-C Electrocatalyst-Based Proton Exchange Membrane Fuel Cells,2019,ACS APPLIED MATERIALS & INTERFACES,11,41,,37779,37786,8,58,10.1021/acsami.9b13474,,"[Chen, Junren; Yan, Xiaohui; Fu, Cehuang; Lin, Chen; Li, Xiaolin; Shen, Shuiyun; Ke, Changchun; Zhang, Junliang] Shanghai Jiao Tong Univ, Sch Mech Engn, Inst Fuel Cells, Dongchuan Rd 800, Shanghai, Peoples R China; [Yan, Xiaohui; Shen, Shuiyun; Ke, Changchun; Zhang, Junliang] Shanghai Jiao Tong Univ, MOE Key Lab Power Machinery & Engn, Dongchuan Rd 800, Shanghai, Peoples R China; [Feng, Yan] SAIC Motor Corp Ltd, Adv Technol Dept, Shanghai 201804, Peoples R China",,"In the past few years, great progress has been made in nonprecious metal catalysts, which hold the potential as alternative materials to replace platinum in proton exchange membrane fuel cells. One type of nonprecious metal catalyst, Fe-N-C, has displayed similar catalytic activity as platinum in rotating disk electrode tests; however, rapid degradation of Fe-N-C catalyst-based fuel cells is always observed, which limits its practical application. Although considerable research has been devoted to study the degradation of the catalyst itself, rather less attention has been paid to the membrane electrode assembly that makes the mechanism of fuel cell degradation remain unclear. In this work, a high-performance Fe-N-C catalyst-based membrane electrolyte assembly is prepared and used to study its degradation mechanism. The fuel cell performs with an initial peak power density as high as 1.1 W cm(-2) but suffers a current loss of 52% at 0.4 V over 20 h only. The experimental and DFT calculation results indicate that Fe at active sites of catalysts is attacked by hydroxyl free radicals decomposed from H2O2, which is further leached out, causing an increase in activity loss. The ionomer of the catalyst layer and the membrane is further contaminated by the leached Fe ions, which results in an enlarged membrane resistance and cathode catalyst layer proton conduction resistance, greatly influencing the cell performance. In addition, it has been assumed in previous studies that the quick performance loss of Fe-N-C-based fuel cells is caused by water flooding within the catalyst layer, which is proved to be incorrect in our study through a dry-out experiment.",nonprecious metal catalysts; proton exchange membrane fuel cells; degradation; electrochemical impedance spectroscopy,OXYGEN REDUCTION REACTION; DOPED CARBON; ACIDIC MEDIA; CATALYSTS; PERFORMANCE; STABILITY; IRON; ELECTROREDUCTION; NANOSTRUCTURES; DURABILITY,nonprecious metal catalysts;proton exchange membrane fuel cells;degradation;electrochemical impedance spectroscopy;OXYGEN REDUCTION REACTION;DOPED CARBON;ACIDIC MEDIA;CATALYSTS;PERFORMANCE;STABILITY;IRON;ELECTROREDUCTION;NANOSTRUCTURES;DURABILITY,junliang.zhang@sjtu.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1944-8244,,,31539220,English,ACS APPL MATER INTER,Article,WoS,Science & Technology - Other Topics; Materials Science,WOS:000491219700040,2-s2.0-85073121547,China,sjtu.edu.cn,Shanghai Jiao Tong Univ;SAIC Motor Corp Ltd,"Shanghai Jiao Tong Univ, China;SAIC Motor Corp Ltd, China","Chen, Junren; Yan, Xiaohui; Fu, Cehuang; Feng, Yan; Lin, Chen; Li, Xiaolin; Shen, Shuiyun; Ke, Changchun; Zhang, Junliang"
"Wang, H.Y., Weng, C.C., Yuan, Z.Y.",Insights into efficient transition metal-nitrogen/carbon oxygen reduction electrocatalysts,2021,JOURNAL OF ENERGY CHEMISTRY,56,,,470,485,16,81,10.1016/j.jechem.2020.08.030,,"[Wang, Hao-Yu; Weng, Chen-Chen; Yuan, Zhong-Yong] Nankai Univ, Sch Mat Sci & Engn, Natl Inst Adv Mat, Tianjin 300350, Peoples R China",,"It is of vital importance to accelerate the sluggish oxygen reduction reaction (ORR) process at the cathode with earth-abundant metal-based catalysts for the commercialization of low-temperature polymer electrolyte membrane fuel cells. In consideration of high catalytic activity, long-term stability and low cost of potential ORR electrocatalysts, transition metal species have attracted much interest and transition metal-nitrogen-carbon (M-N/C, M = Fe, Co, Ni, Mn, etc.) catalysts have been widely considered as the most promising non-precious metal catalysts for ORR. Herein, the fundamental understanding of ORR catalytic mechanism and the identification of active centers are briefly introduced, and then different M-N/C catalysts classified by precursors with the strategies for design and optimization are highlighted. The challenges and possible opportunity for future development of high-performance ORR catalysts are finally proposed. (C) 2020 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.",Electrocatalysis; Oxygen reduction reaction; Metal-nitrogen/carbon; Fuel cell,N-DOPED CARBON; ACTIVE-SITES; HYDROGEN EVOLUTION; BIFUNCTIONAL CATALYSTS; COMPOSITE CATALYSTS; ORGANIC FRAMEWORKS; RATIONAL DESIGN; ENERGY-STORAGE; C CATALYSTS; FE,Electrocatalysis;Oxygen reduction reaction;Metal-nitrogen/carbon;Fuel cell;N-DOPED CARBON;ACTIVE-SITES;HYDROGEN EVOLUTION;BIFUNCTIONAL CATALYSTS;COMPOSITE CATALYSTS;ORGANIC FRAMEWORKS;RATIONAL DESIGN;ENERGY-STORAGE;C CATALYSTS;FE,zyyuan@nankai.edu.cn,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2095-4956,,,,English,J ENERGY CHEM,Article,WoS,Chemistry; Energy & Fuels; Engineering,WOS:000634451900005,2-s2.0-85090353888,China,nankai.edu.cn,Nankai Univ,"Nankai Univ, China","Wang, Hao-Yu; Weng, Chen-Chen; Yuan, Zhong-Yong"
"Shen, S.Y., Chen, J.R., Yan, X.H., Cheng, X.J., Zhao, L.T., Ren, Z.W., Li, L., Zhang, J.L.",Insights into properties of non-precious metal catalyst (NPMC)-based catalyst layer for proton exchange membrane fuel cells,2021,JOURNAL OF POWER SOURCES,496,,229817,,,8,18,10.1016/j.jpowsour.2021.229817,,"[Shen, Shuiyun; Chen, Junren; Yan, Xiaohui; Cheng, Xiaojing; Zhao, Lutian; Ren, Ziwen; Li, Lin; Zhang, Junliang] Shanghai Jiao Tong Univ, Inst Fuel Cells, Sch Mech Engn, Dongchuan Rd 800, Shanghai, Peoples R China; [Zhang, Junliang] Shanghai Jiao Tong Univ, MOE Key Lab Power Machinery & Engn, Dongchuan Rd 800, Shanghai, Peoples R China",,"Non-precious metal catalysts (NPMCs) are regarded as the ultimate alternative to high-cost Pt-based catalysts for oxygen reduction reaction in proton exchange membrane fuel cells (PEMFCs). Indeed, great progresses have been made in the rotating disk electrode (RDE) performance of NPMCs, while their corresponding fuel cell performance remains far from satisfying real demands due to the fact that the properties of NPMC-based electrode need to be clarified and optimized. In this work, a series of properties including the oxygen reduction activities, catalyst layer proton conduction resistance and oxygen transport resistance are investigated on membrane electrode assemblies (MEAs) fabricated from home-made Fe-N-C catalysts. It is found that both the oxygen reduction activities and catalyst layer proton conduction increase with the catalyst loading. Unexpectedly, the total oxygen transport resistance is quite large for the MEA with a lower catalyst loading, and the resistance first decreases and then enlarges with the increase in catalyst loading, resulting from a comprehensive effect between local transport and bulk transport. This provides a novel meaningful guide that compared to using Pt-based MEA technique directly, special and deliberate designs are needed for MEAs based on NPMCs to balance the cathode catalyst layer (CCL) activity, proton resistance and oxygen transport resistance simultaneously.",Non-precious metal catalyst; Proton exchange membrane fuel cell; Membrane electrode assembly; Oxygen transport; Proton conduction,OXYGEN-REDUCTION; CARBON; ELECTROCATALYSTS; CATHODE; ENERGY; PERFORMANCE; COMPOSITE; PROGRESS; DESIGN; IRON,Non-precious metal catalyst;Proton exchange membrane fuel cell;Membrane electrode assembly;Oxygen transport;Proton conduction;OXYGEN-REDUCTION;CARBON;ELECTROCATALYSTS;CATHODE;ENERGY;PERFORMANCE;COMPOSITE;PROGRESS;DESIGN;IRON,junliang.zhang@sjtu.edu.cn,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:000641970800004,2-s2.0-85103421791,China,sjtu.edu.cn,Shanghai Jiao Tong Univ,"Shanghai Jiao Tong Univ, China","Shen, Shuiyun; Chen, Junren; Yan, Xiaohui; Cheng, Xiaojing; Zhao, Lutian; Ren, Ziwen; Li, Lin; Zhang, Junliang"
"Chen, L.Y., Liu, X.F., Zheng, L.R., Li, Y.C., Guo, X., Wan, X., Liu, Q.T., Shang, J.X., Shui, J.L.",Insights into the role of active site density in the fuel cell performance of Co-N-C catalysts,2019,APPLIED CATALYSIS B-ENVIRONMENTAL,256,,117849,,,8,141,10.1016/j.apcatb.2019.117849,,"[Chen, Linyun; Liu, Xiaofang; Li, Yongcheng; Guo, Xu; Wan, Xin; Liu, Qingtao; Shang, Jiaxiang; Shui, Jianglan] Beihang Univ, Sch Mat Sci & Engn, 37 Xueyuan Rd, Beijing 100083, Peoples R China; [Zheng, Lirong] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, 19 Yuquan Rd, Beijing 100049, Peoples R China",,"Improvement of proton exchange membrane fuel cell (PEMFC) performance of Co-N-C electrocatalyst requires an in-depth understanding of performance enhancement mechanism. Herein, we synthesize a series of Co-N-C catalysts with different CoN4 densities. CoN4 active sites (electrochemical accessible ones) and CoN4 species are differentiated in the study. The power density shows a slow linear increase in the low concentration region and an accelerated increase in the high concentration region of CoN4 active sites, showing the crucial role of the high active site density to the high power density of Co-N-C. The optimized Co-N-C achieves a high power density of 826 mW cm(-2). Meanwhile, CoN4 ORR turnover frequency (TOF) is calculated to be 0.01 s(-1) at 0.8 V vs. RHE in acid media. The results allow us to predict that many non-precious metal catalysts with only moderate activity may have considerable PEMFC performance as long as possessing sufficiently dense active sites.",Single-atom catalyst; Co-N-C; Active site; Fuel cell; Power density,OXYGEN REDUCTION REACTION; NONPRECIOUS METAL CATALYST; IRON-BASED CATALYSTS; CARBON SPHERES; ELECTROCATALYSTS; ATOM; IDENTIFICATION; COORDINATION; STABILITY,Single-atom catalyst;Co-N-C;Active site;Fuel cell;Power density;OXYGEN REDUCTION REACTION;NONPRECIOUS METAL CATALYST;IRON-BASED CATALYSTS;CARBON SPHERES;ELECTROCATALYSTS;ATOM;IDENTIFICATION;COORDINATION;STABILITY,shuijianglan@buaa.edu.cn,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0926-3373,,,,English,APPL CATAL B-ENVIRON,Article,WoS,Chemistry; Engineering,WOS:000483451200061,2-s2.0-85067783602,China,buaa.edu.cn,Beihang Univ;Chinese Acad Sci,"Beihang Univ, China;Chinese Acad Sci, China","Chen, Linyun; Liu, Xiaofang; Zheng, Lirong; Li, Yongcheng; Guo, Xu; Wan, Xin; Liu, Qingtao; Shang, Jiaxiang; Shui, Jianglan"
"Kim, Y., Urbina, L.P., Asset, T., Secanell, M., Atanassov, P., Barralet, J., Gostick, J.T.",Insights on designing non-PGM catalyst layers at low humidity,2023,Journal of Power Sources,562,,232741,,,,5,10.1016/j.jpowsour.2023.232741,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85147883710&doi=10.1016%2Fj.jpowsour.2023.232741&partnerID=40&md5=641dc5eafce31549e07fe4036ec80a5e,"University of Waterloo, Waterloo, ON, Canada; University of Alberta, Edmonton, AB, Canada; Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), Strasbourg, Grand Est, France; Samueli School of Engineering, Irvine, CA, United States; Université McGill, Montreal, QC, Canada","Kim, Yongwook, University of Waterloo, Waterloo, ON, Canada; Urbina, Luis Padilla, University of Alberta, Edmonton, AB, Canada; Asset, Tristan, Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), Strasbourg, Grand Est, France, Samueli School of Engineering, Irvine, CA, United States; Secanell, Marc M., University of Alberta, Edmonton, AB, Canada; Atanassov, Plamen B., Samueli School of Engineering, Irvine, CA, United States; Barralet, Jake E., Université McGill, Montreal, QC, Canada; Gostick, Jeff T., University of Waterloo, Waterloo, ON, Canada","Non-precious group metal (non-PGM) catalysts offer the opportunity to significantly reduce fuel cell costs. However, owing to its low volumetric activity, non-PGM electrodes are made an order of magnitude thicker than platinum-based electrodes. Thicker electrodes increase transport losses making it critical to optimize electrode composition. In most studies, non-PGM electrodes are tested with fully humidified O<inf>2</inf>/air to maximize the proton conductivity. However, the fully humidified inlet gas makes non-PGM electrodes more prone to water flooding which can cause long-term performance degradation. In the present study, a single-phase, non-isothermal model was used to investigate the structure-performance relationships of the non-PGM electrodes operated at low relative humidity. Our modeling study reveals that high porosity is not necessarily required for non-PGM electrodes operating at low relative humidity. Instead, high solid and electrolyte phase volume fractions are desired. Our proposed strategy is to reduce the thickness of the non-PGM electrode while keeping the mass loading of the non-PGM catalyst consistent. © 2023 Elsevier B.V.",Catalyst layer; Finite elements; PEM Fuel cell; Precious group metal-free catalyst; Sacrificial support method,Catalysts; Electrodes; Finite element method; Solid electrolytes; Catalysts layers; Finite element; Low relative humidities; Metal catalyst; Metal electrodes; Metal-free catalysts; PEM fuel cell; Precious group metal-free catalyst; Sacrificial support method; Support method; Proton exchange membrane fuel cells (PEMFC),Catalyst layer;Finite elements;PEM Fuel cell;Precious group metal-free catalyst;Sacrificial support method;Catalysts;Electrodes;Finite element method;Solid electrolytes;Catalysts layers;Finite element;Low relative humidities;Metal catalyst;Metal electrodes;Metal-free catalysts;Support method;Proton exchange membrane fuel cells (PEMFC),"J.T. Gostick; Department of Chemical Engineering, University of Waterloo, Waterloo, N2L 3G1, Canada; email: jgostick@uwaterloo.ca",,,,,,Elsevier B.V.,03787753,0444894810,JPSOD,,English,J Power Sources,Article,Scopus,,2-s2.0-85147883710,,Canada;France;United States,uwaterloo.ca,,,"Kim, Y.; Urbina, L.P.; Asset, T.; Secanell, M.; Atanassov, P.; Barralet, J.; Gostick, J.T."
"Wang, X., Zhang, Q., Jiang, H., Li, Y., Zhu, H., Zheng, L., Gu, L., Liang, H.P.",In Situ Alloying with Hybrid Mesoporous Fe-N-C to Accelerate the Catalysis Efficiency of Pt for the Oxygen Reduction Reaction,2023,ACS Sustainable Chemistry and Engineering,11,27,,10051,10060,,19,10.1021/acssuschemeng.3c01836,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85164373873&doi=10.1021%2Facssuschemeng.3c01836&partnerID=40&md5=83bea6e9c1c22a014e4c824740480347,"Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Qingdao, Shandong, China; Institute of Physics Chinese Academy of Sciences, Beijing, Beijing, China; State Key Laboratory of Crystal Materials, Jinan, Shandong, China; Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China","Wang, Xilong, Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Qingdao, Shandong, China; Zhang, Qinghua, Institute of Physics Chinese Academy of Sciences, Beijing, Beijing, China; Jiang, Hechun, State Key Laboratory of Crystal Materials, Jinan, Shandong, China; Li, Yadong, Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Qingdao, Shandong, China; Zhu, Hongwei, Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Qingdao, Shandong, China; Zheng, Lirong, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China; Gu, Lin, Institute of Physics Chinese Academy of Sciences, Beijing, Beijing, China; Liang, Hanpu, Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Qingdao, Shandong, China, Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China","Pt-based intermetallic alloys with high activity and stability are promising for accelerating the cathodic oxygen reduction reaction (ORR) and large-scale application of proton exchange membrane fuel cells. So far, facile synthesis of Pt-based alloys in less time is desirable but still challenging. Herein, based on the traditional wet impregnation method, facile in situ reduction of H<inf>2</inf>PtCl<inf>6</inf> and alloying with a hybrid nanostructure mainly doped with Fe single atoms as well as small amounts of Fe-based nanoparticles and oxides were developed to fabricate highly dispersed PtFe nanoparticles loaded on a mesoporous Fe-N-C support. Alloying of Pt derived from H<inf>2</inf>PtCl<inf>6</inf> with various iron-based species existing in forms of single-atom, metallic, and oxide states was confirmed by systematic characterization, and the Fe content in the support is important for PtFe alloy formation, and the corresponding electrochemical performance promotion has been identified. The as-synthesized best-performance PtFe/Meso-PDA-5 catalyst delivered a high potential of 0.925 V at a current density of 3 mA cm-2 and achieved a high mass activity of 497.5 mA mg<inf>Pt</inf>-1 at 0.9 V for the ORR in 0.1 M HClO<inf>4</inf>. More importantly, only 17.9% mass activity loss was observed after 10k potential cycles of the accelerated deterioration test. The present work provides a strategy for facile synthesis of Pt-based alloy nanomaterials for ORR catalysis and highlights the importance of supports in alloy formation. © 2023 American Chemical Society.",hybrid Fe−N−C support; mesoporous carbon; oxygen reduction reaction; polydopamine; PtFe intermetallic alloy,Alloying; Binary alloys; Catalysis; Chlorine compounds; Deterioration; Electrolytic reduction; Intermetallics; Iron alloys; Iron oxides; Mesoporous materials; Nanoparticles; Oxygen; Proton exchange membrane fuel cells (PEMFC); Alloy formation; Facile synthesis; Hybrid fe−N−C support; Intermetallic alloys; Mesoporous; Mesoporous carbon; Oxygen reduction reaction; Polydopamine; Ptfe intermetallic alloy; Single-atoms; Platinum alloys,hybrid Fe−N−C support;mesoporous carbon;oxygen reduction reaction;polydopamine;PtFe intermetallic alloy;Alloying;Binary alloys;Catalysis;Chlorine compounds;Deterioration;Electrolytic reduction;Intermetallics;Iron alloys;Iron oxides;Mesoporous materials;Nanoparticles;Oxygen;Proton exchange membrane fuel cells (PEMFC);Alloy formation;Facile synthesis;Intermetallic alloys;Mesoporous;Single-atoms;Platinum alloys,"L. Zheng; Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China; email: zhenglr@ihep.ac.cn; H.-P. Liang; Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China; email: lianghp@qibebt.ac.cn",,,,,,American Chemical Society,,,,,English,ACS Sustainable Chem. Eng.,Article,Scopus,,2-s2.0-85164373873,,China,ihep.ac.cn,,,"Wang, X.; Zhang, Q.; Jiang, H.; Li, Y.; Zhu, H.; Zheng, L.; Gu, L.; Liang, H.-P."
"Malko, D., Kucernak, A., Lopes, T.",In situ electrochemical quantification of active sites in Fe-N/C non-precious metal catalysts,2016,NATURE COMMUNICATIONS,7,,13285,,,7,480,10.1038/ncomms13285,,"[Malko, Daniel; Kucernak, Anthony] Imperial Coll London, Dept Chem, South Kensington Campus, London SW7 2AZ, England; [Lopes, Thiago] IPEN CNEN SP, Nucl & Energy Res Inst, Fuel Cells & Hydrogen Ctr, BR-05508000 Sao Paulo, Brazil",,"The economic viability of low temperature fuel cells as clean energy devices is enhanced by the development of inexpensive oxygen reduction reaction catalysts. Heat treated iron and nitrogen containing carbon based materials (Fe-N/C) have shown potential to replace expensive precious metals. Although significant improvements have recently been made, their activity and durability is still unsatisfactory. The further development and a rational design of these materials has stalled due to the lack of an in situ methodology to easily probe and quantify the active site. Here we demonstrate a protocol that allows the quantification of active centres, which operate under acidic conditions, by means of nitrite adsorption followed by reductive stripping, and show direct correlation to the catalytic activity. The method is demonstrated for two differently prepared materials. This approach may allow researchers to easily assess the active site density and turnover frequency of Fe-N/C catalysts.",,OXYGEN REDUCTION REACTION; PEM FUEL-CELLS; IRON CARBIDE NANOPARTICLES; NITROGEN-DOPED CARBON; FE/N/C-CATALYSTS; ORR; DENSITY,OXYGEN REDUCTION REACTION;PEM FUEL-CELLS;IRON CARBIDE NANOPARTICLES;NITROGEN-DOPED CARBON;FE/N/C-CATALYSTS;ORR;DENSITY,anthony@imperial.ac.uk,,"MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND",,,,NATURE PUBLISHING GROUP,2041-1723,,,27796287,English,NAT COMMUN,Article,WoS,Science & Technology - Other Topics,WOS:000386455900001,,United Kingdom;Brazil,imperial.ac.uk,Imperial Coll London;IPEN CNEN SP,"Imperial Coll London, United Kingdom;IPEN CNEN SP, Brazil","Malko, Daniel; Kucernak, Anthony; Lopes, Thiago"
"Fu, X.G., Zamani, P., Choi, J.Y., Hassan, F.M., Jiang, G.P., Higgins, D.C., Zhang, Y.N., Hoque, M.A., Chen, Z.W.",In Situ Polymer Graphenization Ingrained with Nanoporosity in a Nitrogenous Electrocatalyst Boosting the Performance of Polymer-Electrolyte-Membrane Fuel Cells,2017,ADVANCED MATERIALS,29,7,1604456,,,8,214,10.1002/adma.201604456,,"[Fu, Xiaogang; Zamani, Pouyan; Choi, Ja-Yeon; Hassan, Fathy M.; Jiang, Gaopeng; Higgins, Drew C.; Zhang, Yining; Hoque, Md Ariful; Chen, Zhongwei] Univ Waterloo, Dept Chem Engn, 200 Univ Ave W, Waterloo, ON N2L 3G1, Canada; [Higgins, Drew C.] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA; [Higgins, Drew C.] Stanford Univ, Shriram Ctr, Dept Chem Engn, 443 Via Ortega, Stanford, CA 94305 USA",,,,OXYGEN-REDUCTION REACTION; NONPRECIOUS-METAL-CATALYSTS; SULFUR-DOPED GRAPHENE; O-2 ELECTROREDUCTION; ORGANIC FRAMEWORK; FE/N/C-CATALYSTS; POLYANILINE; IRON; DURABILITY; PLATINUM,OXYGEN-REDUCTION REACTION;NONPRECIOUS-METAL-CATALYSTS;SULFUR-DOPED GRAPHENE;O-2 ELECTROREDUCTION;ORGANIC FRAMEWORK;FE/N/C-CATALYSTS;POLYANILINE;IRON;DURABILITY;PLATINUM,zhwchen@uwaterloo.ca,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,0935-9648,,,27982465,English,ADV MATER,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000396144600016,,Canada;United States,uwaterloo.ca,Univ Waterloo;Los Alamos Natl Lab;Stanford Univ,"Univ Waterloo, Canada;Los Alamos Natl Lab, United States;Stanford Univ, United States","Fu, Xiaogang; Zamani, Pouyan; Choi, Ja-Yeon; Hassan, Fathy M.; Jiang, Gaopeng; Higgins, Drew C.; Zhang, Yining; Hoque, Md Ariful; Chen, Zhongwei"
"Li, X., Cheng, C., Ruan, Q., Gao, Y., Kong, L., Shi, Y., Zhang, B.",In Situ Probing and Phosphate-Assisted Recovery of Proton Transfer to Eliminate H2O2 Formation in the Oxygen Reduction Reaction,2025,Journal of the American Chemical Society,147,28,,24984,24992,,4,10.1021/jacs.5c07815,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105009753897&doi=10.1021%2Fjacs.5c07815&partnerID=40&md5=97dac51ee339f1785407240c9aa76d09,"Institute of Molecular Plus, Tianjin University, Tianjin, China","Li, Xiang, Institute of Molecular Plus, Tianjin University, Tianjin, China; Cheng, Chuanqi, Institute of Molecular Plus, Tianjin University, Tianjin, China; Ruan, Qingqing, Institute of Molecular Plus, Tianjin University, Tianjin, China; Gao, Ying, Institute of Molecular Plus, Tianjin University, Tianjin, China; Kong, Lingjun, Institute of Molecular Plus, Tianjin University, Tianjin, China; Shi, Yanmei, Institute of Molecular Plus, Tianjin University, Tianjin, China; Zhang, Bin, Institute of Molecular Plus, Tianjin University, Tianjin, China","Single-atom Fe–N–C is a promising candidate for the oxygen reduction reaction (ORR) at the cathode of proton-exchange membrane fuel cells (PEMFCs). However, under strongly acidic conditions, Fe–N–C suffers from severe oxidation from Fenton reactions caused by trace amounts of dissolved Fe and a 2-electron (2e) ORR product of H<inf>2</inf>O<inf>2</inf>. Herein, we demonstrate a facile and general strategy to nearly eliminate the 2e path of the ORR by introducing phosphates. We discover that bubbling O<inf>2</inf> into water introduces an inherent problem in breaking the hydrogen-bond network and thus hindering proton transfer, resulting in a decreased 4e ORR selectivity. Introducing phosphates is found to recover the hydrogen-bond network to eliminate the 2e path. This strategy works well for Fe–N–C, commercial Pt/C, and even carbon catalysts with a dominant 2e selectivity, resulting in negligible H<inf>2</inf>O<inf>2</inf> production and better stability in both the rotating ring-disk electrode system and flow cell. Our work provides deep insight into the ORR mechanism and a useful strategy to lower the cost and lengthen the lifetime of PEMFCs by using nonnoble metal electrocatalysts as cathodes. © 2025 American Chemical Society",,Cathodes; Electrocatalysts; Electrolytic reduction; Hydrogen bonds; Hydrogen production; Iron; Iron compounds; Oxygen; Oxygen reduction reaction; Phosphates; Platinum compounds; Proton transfer; Acidic conditions; Electron path; Fenton reactions; Hydrogen bond networks; Hydrogen-bond networks; In-situ probing; Proton-exchange membranes fuel cells; Single-atoms; Trace amounts; Proton exchange membrane fuel cells (PEMFC); hydrogen peroxide; phosphate; carbon; oxygen; proton; analytical parameters; Article; catalyst; chemical analysis; density functional theory; electrochemical analysis; Fourier transform infrared spectroscopy; hydrogen bond; hydrogen evolution reaction; in situ probing; linear sweep voltammetry; network analysis; nonhuman; oxygen reduction reaction; proton exchange membrane fuel cell; proton transport; protonation; X ray photoemission spectroscopy; article; atom; cathode electrode; controlled study; electron; Fenton reaction; fuel; human cell; membrane; oxidation; pharmaceutics; reduction (chemistry); rotating ring disk electrode; water,Cathodes;Electrocatalysts;Electrolytic reduction;Hydrogen bonds;Hydrogen production;Iron;Iron compounds;Oxygen;Oxygen reduction reaction;Phosphates;Platinum compounds;Proton transfer;Acidic conditions;Electron path;Fenton reactions;Hydrogen bond networks;Hydrogen-bond networks;In-situ probing;Proton-exchange membranes fuel cells;Single-atoms;Trace amounts;Proton exchange membrane fuel cells (PEMFC);hydrogen peroxide;phosphate;carbon;proton;analytical parameters;Article;catalyst;chemical analysis;density functional theory;electrochemical analysis;Fourier transform infrared spectroscopy;hydrogen bond;hydrogen evolution reaction;in situ probing;linear sweep voltammetry;network analysis;nonhuman;proton exchange membrane fuel cell;proton transport;protonation;X ray photoemission spectroscopy;atom;cathode electrode;controlled study;electron;Fenton reaction;fuel;human cell;membrane;oxidation;pharmaceutics;reduction (chemistry);rotating ring disk electrode;water,"Y. Shi; Institute of Molecular Plus, Department of Chemistry, School of Science, Tianjin University, Tianjin, 300072, China; email: yanmeishi@tju.edu.cn; B. Zhang; Institute of Molecular Plus, Department of Chemistry, School of Science, Tianjin University, Tianjin, 300072, China; email: bzhang@tju.edu.cn",,,,,,American Chemical Society,00027863,,JACSA,40611819,English,J. Am. Chem. Soc.,Article,Scopus,,2-s2.0-105009753897,,China,tju.edu.cn,,,"Li, X.; Cheng, C.; Ruan, Q.; Gao, Y.; Kong, L.; Shi, Y.; Zhang, B."
"Komini Babu, S.K., Chung, H.T., Zelenay, P., Litster, S.",In-situ through-plane measurements of ionic potential distributions in non-precious metal catalyst electrode for PEFC,2015,ECS Transactions,69,17,,23,33,,9,10.1149/06917.0023ecst,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946057794&doi=10.1149%2F06917.0023ecst&partnerID=40&md5=4d9ec88d3701395dea92c83e34b377e1,"College of Engineering, Pittsburgh, PA, United States; Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States","Komini Babu, Siddharth, College of Engineering, Pittsburgh, PA, United States; Chung, Hoon Taek, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Zelenay, Piotr S., Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Litster, Shawn E., College of Engineering, Pittsburgh, PA, United States","This manuscript presents micro-scale experimental diagnostics and nano-scale resolution X-ray imaging applied to the study of proton conduction in non-precious metal catalyst (NPMC) fuel cell cathodes. NPMC-s have the potential to reduce the cost of the fuel cell for multiple applications. However, NPMC electrodes are inherently thick compared to the convention Pt/C electrode due to the lower volumetric activity. Thus, the electric potential drop through the Nafion across the electrode thickness can yield significant performance loss. Ionomer distributions in the NPMC electrodes with different ionomer loading are extracted from morphological data using nanoscale X-ray computed tomography (nano-XCT) imaging of the cathode. Microstructured electrode scaffold (MES) diagnostics are used to measure the electrolyte potential at discrete points across the thickness of the catalyst layer. Using that apparatus, the electrolyte potential drop, the throughthickness reaction distribution, and the proton conductivity are measured and correlated with the corresponding Nafion morphology and cell performance. © The Electrochemical Society.",,Catalysts; Cathodes; Computerized tomography; Drops; Electric losses; Electric potential; Ionomers; Nanotechnology; Polyelectrolytes; Precious metals; Proton exchange membrane fuel cells (PEMFC); Electrode thickness; Electrolyte potential; Experimental diagnostics; Microstructured electrodes; Multiple applications; Non-precious metal catalysts; Reaction distribution; X-ray computed tomography; Solid electrolytes,Catalysts;Cathodes;Computerized tomography;Drops;Electric losses;Electric potential;Ionomers;Nanotechnology;Polyelectrolytes;Precious metals;Proton exchange membrane fuel cells (PEMFC);Electrode thickness;Electrolyte potential;Experimental diagnostics;Microstructured electrodes;Multiple applications;Non-precious metal catalysts;Reaction distribution;X-ray computed tomography;Solid electrolytes,,"Gasteiger, H.A.; Weber, A.Z.; Ramani, V.K.; Fuller, T.F.; Mantz, R.A.; Uchida, H.; Buchi, F.N.; Edmundson, M.; Coutanceau, C.; Fenton, J.M.; Mitsushima, S.; Schmidt, T.J.; Shinohara, K.; Swider-Lyons, K.; Jones, D.J.; Pivovar, B.S.; Ayers, K.E.; Perry, K.A.; Narayanan, S.R.; Strasser, P.",,"Symposium on Polymer Electrolyte Fuel Cells 15, PEFC 2015 - 228th ECS Meeting",Phoenix,2015-10-11 through 2015-10-15,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-84946057794,,United States,No email,,,"Komini Babu, S.K.; Chung, H.T.; Zelenay, P.; Litster, S."
"Nabae, Y., Nagata, S., Kusaba, K., Aoki, T., Yuan, Q., Takao, N., Itoh, T., Arao, M., Imai, H., Higashi, K., Sakata, T., Uruga, T., Iwasawa, Y.",In-situ XAFS study to monitor the degradation of an Fe/N/C cathode catalyst in PEMFC,2019,ECS Transactions,92,8,,621,625,,0,10.1149/09208.062ecst,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85077491496&doi=10.1149%2F09208.062ecst&partnerID=40&md5=c8d83d459d6eb1c5043ea3aa71bdb19f,"Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; Device Analysis Department, Nissan Arc, Ltd., Yokosuka, Kanagawa, Japan; The University of Electro-Communications, Chofu, Tokyo, Japan","Nabae, Yuta, Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; Nagata, Shinsuke, Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; Kusaba, Keizo, Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; Aoki, Tsutomu, Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; Yuan, Qiuyi, Device Analysis Department, Nissan Arc, Ltd., Yokosuka, Kanagawa, Japan; Takao, Naoki, Device Analysis Department, Nissan Arc, Ltd., Yokosuka, Kanagawa, Japan; Itoh, Takanori, Device Analysis Department, Nissan Arc, Ltd., Yokosuka, Kanagawa, Japan; Arao, Masazumi, Device Analysis Department, Nissan Arc, Ltd., Yokosuka, Kanagawa, Japan; Imai, Hideto, Device Analysis Department, Nissan Arc, Ltd., Yokosuka, Kanagawa, Japan; Higashi, Kotaro, The University of Electro-Communications, Chofu, Tokyo, Japan; Sakata, Tomohiro, The University of Electro-Communications, Chofu, Tokyo, Japan; Uruga, Tomoya, The University of Electro-Communications, Chofu, Tokyo, Japan; Iwasawa, Yashuhiro, The University of Electro-Communications, Chofu, Tokyo, Japan","Understanding the degradation mechanism of Fe/N/C cathode catalysts in proton exchange membrane fuel cells (PEMFCs) is extremely important. In this study, an Fe/N/C catalyst prepared from polyimide nano-particles was placed in an in-situ cell for X-ray absorption spectroscopy, and its Fe K-edge adsorption spectra were acquired during a continuous operation of the fuel cell. The valence of the Fe specie at the initial stage was 3+. The spectra gradually changed during the fuel cell operation, suggesting that the dissolution of the Fe species from the active sites. © The Electrochemical Society.",,Catalysts; Cathodes; Degradation; Electrolytic cells; Gas fuel purification; Iron metallography; Nanoparticles; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); X ray absorption spectroscopy; Active site; Adsorption spectrum; Cathode catalyst; Continuous operation; Degradation mechanism; Fuel cell operation; Proton exchange membrane fuel cell (PEMFCs); Situ cells; Solid electrolytes,Catalysts;Cathodes;Degradation;Electrolytic cells;Gas fuel purification;Iron metallography;Nanoparticles;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);X ray absorption spectroscopy;Active site;Adsorption spectrum;Cathode catalyst;Continuous operation;Degradation mechanism;Fuel cell operation;Proton exchange membrane fuel cell (PEMFCs);Situ cells;Solid electrolytes,,"Swider-Lyons, K.; Uchida, H.; Buechi, F.; Mustain, W.E.; Pivovar, B.S.; Pintauro, P.N.; Weber, A.Z.; Jones, D.; Gasteiger, H.; Rice, C.A.; Strasser, P.; Kjeang, E.; Shinohara, K.; Mitsushima, S.; Kim, Y.-T.; Schmidt, T.J.; Fenton, J.M.; Mantz, R.A.; Lakshmanan, B.; Xu, H.",,"Symposium on Polymer Electrolyte Fuel Cells and Electrolyzers 19, PEFC and E 2019 - 236th ECS Meeting",Atlanta,2019-10-13 through 2019-10-17,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-85077491496,,Japan,No email,,,"Nabae, Y.; Nagata, S.; Kusaba, K.; Aoki, T.; Yuan, Q.; Takao, N.; Itoh, T.; Arao, M.; Imai, H.; Higashi, K.; Sakata, T.; Uruga, T.; Iwasawa, Y."
"Nabae, Y., Yuan, Q., Nagata, S., Kusaba, K., Aoki, T., Takao, N., Itoh, T., Arao, M., Imai, H., Higashi, K., Sakata, T., Uruga, T., Iwasawa, Y.",In Situ X-ray Absorption Spectroscopy to Monitor the Degradation of Fe/N/C Cathode Catalyst in Proton Exchange Membrane Fuel Cells,2021,JOURNAL OF THE ELECTROCHEMICAL SOCIETY,168,1,014513,,,6,19,10.1149/1945-7111/abdc64,,"[Nabae, Y.; Nagata, S.; Kusaba, K.; Aoki, T.] Tokyo Inst Technol, Dept Mat Sci & Engn, Meguro Ku, Tokyo 1528552, Japan; [Yuan, Q.; Takao, N.; Itoh, T.; Arao, M.; Imai, H.] NISSAN ARC LTD, Device Anal Dept, Yokosuka, Kanagawa 2370061, Japan; [Higashi, K.; Sakata, T.; Uruga, T.; Iwasawa, Y.] Univ Electrocommun, Innovat Res Ctr Fuel Cells, Chofu, Tokyo 1828585, Japan",,"Understanding the degradation mechanism of Fe/N/C cathode catalysts in proton exchange membrane fuel cells (PEMFCs) is important. We studied the degradation of an Fe/N/C catalyst prepared from polyimide nanoparticles in an in situ cell by X-ray absorption spectroscopy (XAS). This technique enables real-time monitoring of the Fe species during a fuel cell operation. The Fe K-edge absorption spectra were recorded during the continuous operation of the fuel cell. Initially during the fuel cell operation, the Fe species were atomically isolated and their valence state was found to be 3+. The spectra gradually changed during the first few hours of operation, suggesting the dissolution of the Fe species from the active sites, whereas the fuel cell performance continued to decrease during the eight hours of operation. The demetallation from the FeNx centers during the first few hours has been successfully monitored in real time, while the remaining FeNx centers seem to be stable in the following fuel cell operating condition.",Electrocatalysis; Fuel Cells; PEM; Electroanalytical Electrochemistry,,Electrocatalysis;Fuel Cells;PEM;Electroanalytical Electrochemistry,nabae.y.aa@m.titech.ac.jp,,"65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA",,,,ELECTROCHEMICAL SOC INC,0013-4651,,,,English,J ELECTROCHEM SOC,Article,WoS,Electrochemistry; Materials Science,WOS:000614364000001,2-s2.0-85101039040,Japan,m.titech.ac.jp,Tokyo Inst Technol;NISSAN ARC LTD;Univ Electrocommun,"Tokyo Inst Technol, Japan;NISSAN ARC LTD, Japan;Univ Electrocommun, Japan","Nabae, Y.; Yuan, Q.; Nagata, S.; Kusaba, K.; Aoki, T.; Takao, N.; Itoh, T.; Arao, M.; Imai, H.; Higashi, K.; Sakata, T.; Uruga, T.; Iwasawa, Y."
"Cheng, X.Y., Jiang, X.T., Yin, S.H., Ji, L.F., Yan, Y.N., Li, G., Huang, R., Wang, C.T., Liao, H.G., Jiang, Y.X., Sun, S.G.",Instantaneous Free Radical Scavenging by CeO2 Nanoparticles Adjacent to the Fe-N4 Active Sites for Durable Fuel Cells,2023,ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,62,34,e202306166,,,9,81,10.1002/anie.202306166,,"[Cheng, Xiaoyang; Jiang, Xiaotian; Yin, Shuhu; Ji, Lifei; Yan, Yani; Li, Guang; Huang, Rui; Liao, Honggang; Jiang, Yanxia; Sun, Shigang] Xiamen Univ, Coll Chem & Chem Engn, Engn Res Ctr Electrochem Technol, State Key Lab Phys Chem Solid Surfaces,Minist Educ, Xiamen 361005, Peoples R China; [Wang, Chongtai] Hainan Normal Univ, Coll Chem & Chem Engn, Key Lab Electrochem Energy Storage & Energy Conver, Haikou 571158, Peoples R China",,"To achieve the Fe-N-C materials with both high activity and durability in proton exchange membrane fuel cells, the attack of free radicals on Fe-N-4 sites must be overcome. Herein, we report a strategy to effectively eliminate radicals at the source to mitigate the degradation by anchoring CeO2 nanoparticles as radicals scavengers adjacent (Sca(ad-CeO2)) to the Fe-N-4 sites. Radicals such as (OH)-O-center dot and HO2 center dot that form at Fe-N-4 sites can be instantaneously eliminated by adjacent CeO2, which shortens the survival time of radicals and the regional space of their damage. As a result, the CeO2 scavengers in Fe-NC/Sca(ad-CeO2) achieved similar to 80 % elimination of the radicals generated at the Fe-N-4 sites. A fuel cell prepared with the Fe-NC/Sca(ad-CeO2) showed a smaller peak power density decay after 30,000 cycles determined with US DOE PGM-relevant AST, increasing the decay of Fe-NCPhen from 69 % to 28 % decay.",free radicals; CeO2 nanoparticles; scavenger; oxygen reduction reaction; fuel cells,N-C ELECTROCATALYST; OXYGEN REDUCTION; DURABILITY; IMPROVE; IRON,free radicals;CeO2 nanoparticles;scavenger;oxygen reduction reaction;fuel cells;N-C ELECTROCATALYST;OXYGEN REDUCTION;DURABILITY;IMPROVE;IRON,yxjiang@xmu.edu.cn; sgsun@xmu.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,,,,37309017,English,ANGEW CHEM INT EDIT,Article,WoS,Chemistry,WOS:001024736200001,,China,xmu.edu.cn,Xiamen Univ;Hainan Normal Univ,"Xiamen Univ, China;Hainan Normal Univ, China","Cheng, Xiaoyang; Jiang, Xiaotian; Yin, Shuhu; Ji, Lifei; Yan, Yani; Li, Guang; Huang, Rui; Wang, Chongtai; Liao, Honggang; Jiang, Yanxia; Sun, Shigang"
"Jang, I., Lee, S., Kim, D.G., Paidi, V.K., Lee, S., Kim, N.D., Jung, J.Y., Lee, K.S., Lim, H.K., Kim, P., Yoo, S.J.",Instantaneous Thermal Energy for Swift Synthesis of Single-Atom Catalysts for Unparalleled Performance in Metal–Air Batteries and Fuel Cells,2024,Advanced Materials,36,32,2403273,,,,27,10.1002/adma.202403273,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85194579098&doi=10.1002%2Fadma.202403273&partnerID=40&md5=4a6f86b5bf100c2b2231aeeff1f6ff42,"Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul, South Korea; Department of Chemical Engineering, Chungbuk National University, Cheongju, Chungcheongbuk-do, South Korea; Department of Environment and Energy Engineering, Sungshin Women's University, Seoul, South Korea; School of Chemical Engineering, Jeonbuk National University, Jeonju, Jeollabuk-do, South Korea; European Synchrotron Radiation Facility, Grenoble, Auvergne-Rhone-Alpes, France; Functional Composite Materials Research Center, Korea Institute of Science and Technology, Seoul, South Korea; Fuel Cell Research & Demonstration Center, Korea Institute of Energy Research, Daejeon, South Korea; Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; Division of Chemical Engineering and Bioengineering, Kangwon National University, Chuncheon, Gangwon-do, South Korea; Division of Energy & Environmental Technology, University of Science and Technology (UST), Daejeon, South Korea","Jang, Injoon, Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul, South Korea, Department of Chemical Engineering, Chungbuk National University, Cheongju, Chungcheongbuk-do, South Korea; Lee, Sehyun, Department of Environment and Energy Engineering, Sungshin Women's University, Seoul, South Korea; Kim, Dong-gun, School of Chemical Engineering, Jeonbuk National University, Jeonju, Jeollabuk-do, South Korea; Paidi, Vinod K., European Synchrotron Radiation Facility, Grenoble, Auvergne-Rhone-Alpes, France; Lee, Sujin, School of Chemical Engineering, Jeonbuk National University, Jeonju, Jeollabuk-do, South Korea; Kim, Namdong, Functional Composite Materials Research Center, Korea Institute of Science and Technology, Seoul, South Korea; Jung, Jae-young, Fuel Cell Research & Demonstration Center, Korea Institute of Energy Research, Daejeon, South Korea; Lee, Kug-seung, Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; Lim, Hyung-kyu, Division of Chemical Engineering and Bioengineering, Kangwon National University, Chuncheon, Gangwon-do, South Korea; Kim, Philyong, School of Chemical Engineering, Jeonbuk National University, Jeonju, Jeollabuk-do, South Korea; Yoo, Sung Jong, Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul, South Korea, Division of Energy & Environmental Technology, University of Science and Technology (UST), Daejeon, South Korea","Based on experimental and computational evidence, phthalocyanine (Pc) compounds in the form of quaternary-bound metal-nitrogen (N) atoms are the most effective catalysts for oxygen reduction reaction (ORR). However, the heat treatment process used in their synthesis may compromise the ideal structure, causing the agglomeration of transition metals. To overcome this issue, a novel method is developed for synthesizing iron (Fe) single-atom catalysts with ideal structures supported by thermally exfoliated graphene oxide (GO). This is achieved through a short heat treatment of only 2.5 min involving FePc and N, N-dimethylformamide in the presence of GO. According to the synthesis mechanism revealed by this study, carbon monoxide acts as a strong linker between the single Fe atoms and graphene. It facilitates the formation of a structure containing oxygen species between FeN<inf>4</inf> and graphene, which provides high activity and stability for the ORR. These catalysts possess an enormous number of active sites and exhibit enhanced activity toward the alkaline ORR. They demonstrate excellent performance when applied to real electrochemical devices, such as zinc–air batteries and anion exchange membrane fuel cells. It is expected that the instantaneous heat treatment method developed in this study will aid in the development of high-performing single-atom catalysts. © 2024 The Author(s). Advanced Materials published by Wiley-VCH GmbH.",atomic dispersion; fuel cells; instantaneous heat-treatment; M-N-C catalyst; oxygen reduction reaction; Zn–air batteries,"Alkaline fuel cells; Atoms; Carbon monoxide; Catalyst activity; Electrocatalysts; Electrolytic reduction; Graphene; Ion exchange membranes; Iron compounds; Oxygen; Oxygen reduction reaction; Proton exchange membrane fuel cells (PEMFC); Transition metals; Atomic dispersion; Graphene oxides; Instantaneous heat-treatment; M-N-C catalyst; Metal-air battery; Performance; Phthalocyanine compounds; Single-atoms; ]+ catalyst; Heat treatment; carbon monoxide; fuel; graphene; graphene oxide; iron; metal; n,n dimethylformamide; nitrogen; oxygen; phthalocyanine; zinc; air; anion exchange; article; atom; catalyst; controlled study; dispersion; energy; heat treatment; synthesis; thermotherapy","atomic dispersion;fuel cells;instantaneous heat-treatment;M-N-C catalyst;oxygen reduction reaction;Zn–air batteries;Alkaline fuel cells;Atoms;Carbon monoxide;Catalyst activity;Electrocatalysts;Electrolytic reduction;Graphene;Ion exchange membranes;Iron compounds;Oxygen;Proton exchange membrane fuel cells (PEMFC);Transition metals;Graphene oxides;Metal-air battery;Performance;Phthalocyanine compounds;Single-atoms;]+ catalyst;Heat treatment;fuel;graphene oxide;iron;metal;n,n dimethylformamide;nitrogen;phthalocyanine;zinc;air;anion exchange;article;atom;catalyst;controlled study;dispersion;energy;synthesis;thermotherapy","S.J. Yoo; Hydrogen·Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), Seongbuk-gu, 5 Hwarang-ro 14-gil, Seoul, 02792, South Korea; email: ysj@kist.re.kr; P. Kim; School of Chemical Engineering, School of Semiconductor and Chemical Engineering, Clean Energy Research Center, Jeonbuk National University, Jeonju, 54896, South Korea; email: kimpil1@jbnu.ac.kr; H.-K. Lim; Division of Chemical and Bioengineering, Kangwon National University, Chuncheon, 24341, South Korea; email: hklim@kangwon.ac.kr",,,,,,John Wiley and Sons Inc,09359648,,ADVME,38742630,English,Adv Mater,Article,Scopus,,2-s2.0-85194579098,,South Korea;France,kist.re.kr,,,"Jang, I.; Lee, S.; Kim, D.-G.; Paidi, V.K.; Lee, S.; Kim, N.D.; Jung, J.Y.; Lee, K.-S.; Lim, H.-K.; Kim, P.; Yoo, S.J."
"Bonham, D., Choi, J.Y., Kishimoto, T., Ye, S.Y.",Integrating PGM-Free Catalysts into Catalyst Layers and Proton Exchange Membrane Fuel Cell Devices,2019,ADVANCED MATERIALS,31,31,1804846,,,6,150,10.1002/adma.201804846,,"[Bonham, Dustin; Choi, Ja-Yeon; Ye, Siyu] Ballard Power Syst, 9000 Glenlyon Pkwy, Burnaby, BC V5J 5J8, Canada; [Kishimoto, Takeaki] Nisshinbo Holdings Inc, Business Dev Dept, Midori Ku, 1-2-3 Onodai, Chiba 2670056, Japan; [Kishimoto, Takeaki] Gunma Univ, Grad Sch Sci & Technol, Div Environm Engn Sci, 1-5-1 Tenjin Cho, Kiryu, Gunma 3768515, Japan",,"While proton exchange membrane fuel cells (PEMFCs) continue to expand into commercial markets, there is still pressure to decrease cost. One of the largest opportunities to reducing cost is to reduce the amount of platinum-group metal (PGM) catalysts used in the electrodes (particularly the cathode). Over the past decade, exciting advances in the Fe/N/C family of PGM-free oxygen reduction reaction (ORR) catalysts has provided great optimism that not only can PGMs at the cathode be reduced but possibly be completely eliminated. In fact, in September 2017, Ballard Power Systems announced the commercialization of the world's first PEMFC product to utilize a PGM-free catalyst at the cathode (FCgen-micro (non-precious-metal catalyst, NPMC)). However, for these catalysts to be used in more demanding applications, an improved understanding and new design approaches for PGM-free catalyst layers will be required. Herein, some of the latest research on both modeling and experimental studies in the field of PGM-free catalyst layer research are discussed. In addition, a short discussion on Ballard's new NPMC is provided.",cathode catalyst layer design; non-precious metal catalysts; oxygen reduction reaction; platinum group metal free catalysts; proton exchange membrane fuel cell,OXYGEN REDUCTION REACTION; METAL-FREE CATHODE; ACTIVE-SITES; PERFORMANCE; IRON; OPTIMIZATION; ELECTROCATALYSTS; SPECTROSCOPY; CORROSION; DENSITY,cathode catalyst layer design;non-precious metal catalysts;oxygen reduction reaction;platinum group metal free catalysts;proton exchange membrane fuel cell;METAL-FREE CATHODE;ACTIVE-SITES;PERFORMANCE;IRON;OPTIMIZATION;ELECTROCATALYSTS;SPECTROSCOPY;CORROSION;DENSITY,dustin@dowstone.com.cn; siyu.ye@sinohykey.com,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,0935-9648,,,30605247,English,ADV MATER,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000484129400012,2-s2.0-85059596685,Canada;Japan,dowstone.com.cn,Ballard Power Syst;Nisshinbo Holdings Inc;Gunma Univ,"Ballard Power Syst, Canada;Nisshinbo Holdings Inc, Japan;Gunma Univ, Japan","Bonham, Dustin; Choi, Ja-Yeon; Kishimoto, Takeaki; Ye, Siyu"
"Zhou, F., Ruan, Y., Li, F., Tian, L., Zhu, M., Tie, W., Tian, X., Wang, B., Liu, P., Xu, J., Gao, X., Li, P., Zhou, H., Wu, Y.",Integrating single Ni site and PtNi alloy on two-dimensional porous carbon nanosheet for efficient catalysis in fuel cell,2024,Nano Research,17,8,,6916,6921,,12,10.1007/s12274-024-6692-4,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85193216860&doi=10.1007%2Fs12274-024-6692-4&partnerID=40&md5=0c0c595f163bebb660d2219bbc26b11c,"Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui, China; Shanxi Yanchang Petroleum (Group) Co. Ltd., Xi'an, China; College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, China","Zhou, Fangyao, Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui, China; Ruan, Yaner, Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui, China; Li, Feng, Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui, China; Tian, Lin, Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui, China; Zhu, Mengzhao, Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui, China; Tie, Wenan, Shanxi Yanchang Petroleum (Group) Co. Ltd., Xi'an, China; Tian, Xiaoyan, Shanxi Yanchang Petroleum (Group) Co. Ltd., Xi'an, China; Wang, Bo, Shanxi Yanchang Petroleum (Group) Co. Ltd., Xi'an, China; Liu, Peigen, Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui, China; Xu, Jie, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, China; Gao, Xiaoping, Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui, China; Li, Peng, Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui, China; Zhou, Huang, Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui, China; Wu, Yuen, Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui, China","The performance of catalyst depends on the intrinsic activity of active sites and the structural characteristics of the support. Here, we simultaneously integrate single nickel (Ni) sites and platinum-nickel (PtNi) alloy nanoparticles (NPs) on a two-dimensional (2D) porous carbon nanosheet, demonstrating remarkable catalytic performance in the oxygen reduction reaction (ORR). The single Ni sites can activate the oxygen molecules into key oxygen-containing intermediate that is further efficiently transferred to the adjacent PtNi alloy NPs and rapidly reduced to H<inf>2</inf>O, which establishes a relay catalysis between active sites. The porous structure on the carbon nanosheet support promotes the transfer of active intermediates between these active sites, which assists the relay catalysis by improving mass diffusion. Remarkably, the obtained catalyst demonstrates a half-wave potential of up to 0.942 V, a high mass activity of 0.54 A·mg<inf>Pt</inf>−1, and negligible decay of activity after 30,000 cycles, which are all superior to the commercial Pt/C catalysts with comparable loading of Pt. The theoretical calculation results reveal that the obtained catalyst with defect structure of carbon support presents enhanced relay catalytic effect of PtNi alloy NPs and single Ni sites, ultimately realizing improved catalytic performance. This work provides valuable inspiration for developing low platinum loading catalyst, integrating single atoms and alloy with outstanding performance in fuel cell. © Tsinghua University Press 2024.",proton-exchange membrane fuel cells; Pt-based alloy; relay effect; single atom catalysts; two-dimensional porous carbon nanosheet,Binary alloys; Carbon; Catalysis; Catalyst activity; Nanosheets; Nickel alloys; Oxygen; Platinum alloys; Porous materials; Proton exchange membrane fuel cells (PEMFC); Carbon nanosheets; Porous carbons; Proton-exchange membranes fuel cells; Pt-based alloy; Relay effect; Single atom catalyst; Single-atoms; Two-dimensional; Two-dimensional porous carbon nanosheet; ]+ catalyst; Electrolytic reduction,proton-exchange membrane fuel cells;Pt-based alloy;relay effect;single atom catalysts;two-dimensional porous carbon nanosheet;Binary alloys;Carbon;Catalysis;Catalyst activity;Nanosheets;Nickel alloys;Oxygen;Platinum alloys;Porous materials;Proton exchange membrane fuel cells (PEMFC);Carbon nanosheets;Porous carbons;Proton-exchange membranes fuel cells;Single atom catalyst;Single-atoms;Two-dimensional;]+ catalyst;Electrolytic reduction,"H. Zhou; Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, 230026, China; email: huangz02@ustc.edu.cn; Y. Wu; Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, 230026, China; email: yuenwu@ustc.edu.cn",,,,,,Tsinghua University,19980124,,,,English,Nano. Res.,Article,Scopus,,2-s2.0-85193216860,,China,ustc.edu.cn,,,"Zhou, F.; Ruan, Y.; Li, F.; Tian, L.; Zhu, M.; Tie, W.; Tian, X.; Wang, B.; Liu, P.; Xu, J.; Gao, X.; Li, P.; Zhou, H.; Wu, Y."
"Ao, X., Li, L.F., Ding, Y., Nam, G., Zhao, B.T., Wang, C.D., Liu, M.L.",Interatomic Fe-Cu cooperation in nitrogen-doped carbon for enhanced oxygen reduction,2025,ENERGY & ENVIRONMENTAL SCIENCE,18,15,,7624,7634,11,4,10.1039/d5ee01457c,,"[Ao, Xiang] Xi An Jiao Tong Univ, Ctr Nanomat Renewable Energy CNRE, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R China; [Li, Linfeng; Wang, Chundong] Huazhong Univ Sci & Technol, Sch Integrated Circuits, State Key Lab New Text Mat & Adv Proc, Wuhan 430074, Peoples R China; [Ding, Yong; Nam, Gyutae; Liu, Meilin] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA; [Zhao, Bote] South China Univ Technol, Sch Environm & Energy, Guangzhou 510006, Peoples R China",,"The development of robust and electrocatalytically active catalysts for the oxygen reduction reaction (ORR) remains a significant challenge in advancing electrochemical energy technologies. Here, we report a Fe-Cu dual-metal catalyst embedded in nitrogen-doped porous carbon (FeCu-NC), synthesized via a controllable host-guest encapsulation strategy to enhance charge and mass transfer in the ORR. The FeCu-NC catalyst exhibits impressive ORR performance, with half-wave potentials of 0.918 V and 0.805 V in alkaline and acidic media, respectively, surpassing that of commercial Pt/C (0.889 V) in alkaline media and approaching its activity (0.835 V) under acidic conditions. Moreover, the catalyst demonstrates remarkable stability with negligible degradation in accelerated degradation testing. Density functional theory calculations reveal strong Fe-Cu interactions that optimize intermediate adsorption energies, enhancing catalytic efficiency. In practical applications, the FeCu-NC catalyst delivers high peak power densities of 250.3 mW cm-2 in zinc-air batteries and 0.58 W cm-2 in proton exchange membrane fuel cells. It also exhibits impressive long-term stability compared to other reported non-precious metal catalysts. These findings provide valuable insights for designing advanced catalysts for a wide range of electrocatalytic processes.",,N-C; ACTIVE-SITES; EFFICIENT; ELECTROCATALYSTS; CATALYST; INSIGHT,N-C;ACTIVE-SITES;EFFICIENT;ELECTROCATALYSTS;CATALYST;INSIGHT,botezhao@scut.edu.cn; apcdwang@hust.edu.cn; meilin.liu@mse.gatech.edu,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,1754-5692,,,,English,ENERG ENVIRON SCI,Article,WoS,Chemistry; Energy & Fuels; Engineering; Environmental Sciences & Ecology,WOS:001521166200001,2-s2.0-105009599145,China;United States,scut.edu.cn,Xi An Jiao Tong Univ;Huazhong Univ Sci & Technol;Georgia Inst Technol;South China Univ Technol,"Xi An Jiao Tong Univ, China;Huazhong Univ Sci & Technol, China;Georgia Inst Technol, United States;South China Univ Technol, China","Ao, Xiang; Li, Linfeng; Ding, Yong; Nam, Gyutae; Zhao, Bote; Wang, Chundong; Liu, Meilin"
"Yin, X., Feng, L.G., Yang, W., Zhang, Y.X., Wu, H.Y., Yang, L., Zhou, L., Gan, L., Sun, S.R.",Interface engineering of plasmonic induced Fe/N/C-F catalyst with enhanced oxygen catalysis performance for fuel cells application,2022,NANO RESEARCH,15,3,,2138,2146,9,35,10.1007/s12274-021-3850-9,,"[Yin, Xue; Yang, Wen; Yang, Le; Zhou, Lei] Beijing Inst Technol, Sch Chem & Chem Engn, Key Lab Cluster Sci, Minist Educ,Beijing Key Lab Photoelect Electropho, Beijing 100081, Peoples R China; [Feng, Ligang] Yangzhou Univ, Sch Chem & Chem Engn, Yangzhou 225002, Jiangsu, Peoples R China; [Zhang, Yuanxi; Wu, Haiyan; Gan, Lin] Tsinghua Univ, Shenzhen Geim Graphene Ctr, Tsinghua Shenzhen Int Grad Sch, Inst Mat Res, Shenzhen 518055, Peoples R China; [Sun, Shaorui] Beijing Univ Technol, Coll Environm & Energy Engn, Beijing Key Lab Green Catalysis & Separat, Beijing 100124, Peoples R China",,"The low intrinsic activity of Fe/N/C oxygen catalysts restricts their commercial application in the fuel cells technique; herein, we demonstrated the interface engineering of plasmonic induced Fe/N/C-F catalyst with primarily enhanced oxygen reduction performance for fuel cells applications. The strong interaction between F and Fe-N-4 active sites modifies the catalyst interfacial properties as revealed by X-ray absorption structure spectrum and density functional theory calculations, which changes the electronic structure of Fe-N active site resulting from more atoms around the active site participating in the reaction as well as super-hydrophobicity from C-F covalent bond. The hybrid contribution from active sites and carbon support is proposed to optimize the three-phase microenvironment efficiently in the catalysis electrode, thereby facilitating efficient oxygen reduction performance. High catalytic performance for oxygen reduction and fuel cells practical application catalyzed by Fe/N/C-F catalyst is thus verified, which offers a novel catalyst system for fuel cells technique.",interface engineering; Fe/N/C catalyst; CF4 plasma treatment; three-phase microenvironment; proton exchange membrane fuel cells,SINGLE-ATOM CATALYSTS; REDUCTION REACTION; SURFACE-FLUORINATION; CARBON NANOTUBES; ELECTROCATALYST; NITROGEN; CATHODE; IRON; TRANSPORT; LAYERS,interface engineering;Fe/N/C catalyst;CF4 plasma treatment;three-phase microenvironment;proton exchange membrane fuel cells;SINGLE-ATOM CATALYSTS;REDUCTION REACTION;SURFACE-FLUORINATION;CARBON NANOTUBES;ELECTROCATALYST;NITROGEN;CATHODE;IRON;TRANSPORT;LAYERS,ligang.feng@yzu.edu.cn; wenyang@bit.edu.cn; lgan@sz.tsinghua.edu.cn; sunsr@bjut.edu.cn,,"B605D, XUE YAN BUILDING, BEIJING, 100084, PEOPLES R CHINA",,,,TSINGHUA UNIV PRESS,1998-0124,,,,English,NANO RES,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000696453200002,2-s2.0-85115113373,China,yzu.edu.cn,Beijing Inst Technol;Yangzhou Univ;Tsinghua Univ;Beijing Univ Technol,"Beijing Inst Technol, China;Yangzhou Univ, China;Tsinghua Univ, China;Beijing Univ Technol, China","Yin, Xue; Feng, Ligang; Yang, Wen; Zhang, Yuanxi; Wu, Haiyan; Yang, Le; Zhou, Lei; Gan, Lin; Sun, Shaorui"
"Song, X., Yang, Q., Zou, K., Xie, Z., Wang, J., Ding, W.",Intrinsic Activity: A Critical Challenge of Alkaline Hydrogen Oxidation Reaction,2025,Advanced Functional Materials,35,5,2414570,,,,14,10.1002/adfm.202414570,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85208991127&doi=10.1002%2Fadfm.202414570&partnerID=40&md5=b29e036913e75087ee7e2ebe0fc9a9c8,"Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing, China","Song, Xiaoyun, Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing, China; Yang, Qimei, Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing, China; Zou, Kaisheng, Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing, China; Xie, Zhenyang, Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing, China; Wang, Jian, Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing, China; Ding, Wei, Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing, China","Anion exchange membrane fuel cells (AEMFCs) are advantageous for reducing or even eliminating the dependency on platinum resources, as the alkaline environment allows the use of non-precious metal catalysts for oxygen reduction reaction at the cathode. However, the intrinsic activity of hydrogen oxidation reaction (HOR) catalysts in alkaline environments is 2 to 4 orders of magnitude lower than in acidic environments, which becomes the major challenge for AEMFCs. This review examines the current developments in the intrinsic activity of alkaline HOR catalysts and systematically summarizes the hydrogen activation mechanism with a focus on potential influencing factors and enhancement strategies. Furthermore, it offers insights into the prospects for developing more efficient alkaline HOR catalysts. © 2024 Wiley-VCH GmbH.",alkaline; electrochemistry; energy conversion; hydrogen oxidation; structure-activity relationships,Electrolysis; Oxygen reduction reaction; Proton exchange membrane fuel cells (PEMFC); Alkaline environment; Alkalines; Anion-exchange membrane fuel cells; Critical challenges; Energy; Hydrogen oxidation; Hydrogen oxidation reaction; Intrinsic activities; Structure-activity relationships; ]+ catalyst; Electrolytic reduction,alkaline;electrochemistry;energy conversion;hydrogen oxidation;structure-activity relationships;Electrolysis;Oxygen reduction reaction;Proton exchange membrane fuel cells (PEMFC);Alkaline environment;Alkalines;Anion-exchange membrane fuel cells;Critical challenges;Energy;Hydrogen oxidation reaction;Intrinsic activities;]+ catalyst;Electrolytic reduction,"W. Ding; School of Chemistry and Chemical Engineering, Chongqing University, Center of Advanced Electrochemical Energy (CAEE), Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing, 400044, China; email: dingwei128@cqu.edu.cn",,,,,,John Wiley and Sons Inc,1616301X,,AFMDC,,English,Adv. Funct. Mater.,Review,Scopus,,2-s2.0-85208991127,,China,cqu.edu.cn,,,"Song, X.; Yang, Q.; Zou, K.; Xie, Z.; Wang, J.; Ding, W."
"Sui, R., Chai, J., Liu, X., Pei, J., Zhang, X., Wang, X., Wang, Y., Dong, J., Zhu, W., Chen, W., Zhang, L., Zhuang, Z.",Introducing highly polarizable cation in M-N-C type catalysts to boost their oxygen reduction reaction performance,2024,Applied Catalysis B: Environmental,341,,123251,,,,17,10.1016/j.apcatb.2023.123251,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85171137752&doi=10.1016%2Fj.apcatb.2023.123251&partnerID=40&md5=cfa49dd595adb7c28982f6566128b2b3,"Beijing University of Chemical Technology, Beijing, China; School of Vehicle and Mobility, Tsinghua University, Beijing, China; Energy & Catalysis Center, Beijing Institute of Technology, Beijing, China; Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China; Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China","Sui, Rui, Beijing University of Chemical Technology, Beijing, China; Chai, Jing, School of Vehicle and Mobility, Tsinghua University, Beijing, China; Liu, Xuerui, Beijing University of Chemical Technology, Beijing, China; Pei, Jiajing, Beijing University of Chemical Technology, Beijing, China; Zhang, Xuejiang, Beijing University of Chemical Technology, Beijing, China; Wang, Xingdong, Beijing University of Chemical Technology, Beijing, China; Wang, Yu, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China; Dong, Juncai, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China; Zhu, Wei, Beijing University of Chemical Technology, Beijing, China; Chen, Wenxing, Energy & Catalysis Center, Beijing Institute of Technology, Beijing, China; Zhang, Liang, School of Vehicle and Mobility, Tsinghua University, Beijing, China; Zhuang, Zhongbin, Beijing University of Chemical Technology, Beijing, China","The metal-nitrogen-carbon (M-N-C) type oxygen reduction reaction (ORR) catalysts are promising for hydroxide exchange membrane fuel cells, but catalysts with further improved performance are challenging. Here, we report the efficient improvement of the ORR activity of M-N-C catalysts by employing highly polarizable metal cation Ag+. Ag, Fe single atomic sites embedded in concave nitrogen doped carbon (Ag<inf>1</inf>Fe<inf>1</inf>/CNC) is successfully synthesized and shows high performance towards ORR, indicating by both the ultra-high half-wave potential of 0.917 V and membrane electrolyte assembly performance of peak power density up to 1.26 W cm−2. The binding energy of the ORR intermediates on the highly polarizable Ag site in Ag<inf>1</inf>Fe<inf>1</inf>/CNC was significantly tuned by the adjacent Fe site by more than 0.2 eV, and thus leading to a low theoretical ORR overpotential of only 0.398 V. The employment of the highly polarizable metal cation brings a novel and efficient approach to construct highly active catalysts. © 2023 Elsevier B.V.",Electrochemistry; Fuel cells; Highly polarizable metal cation; Metal-nitrogen-carbon materials; Oxygen reduction reaction,Binding energy; Carbon; Catalysts; Doping (additives); Electrolytes; Electrolytic reduction; Nitrogen; Oxygen; Positive ions; Proton exchange membrane fuel cells (PEMFC); Carbon material; Highly polarizable metal cation; Metal cation; Metal-nitrogen-carbon material; Nitrogen-carbon; Oxygen reduction reaction; Performance; Polarizable cations; Reaction performance; ]+ catalyst; Iron,Electrochemistry;Fuel cells;Highly polarizable metal cation;Metal-nitrogen-carbon materials;Oxygen reduction reaction;Binding energy;Carbon;Catalysts;Doping (additives);Electrolytes;Electrolytic reduction;Nitrogen;Oxygen;Positive ions;Proton exchange membrane fuel cells (PEMFC);Carbon material;Metal cation;Metal-nitrogen-carbon material;Nitrogen-carbon;Performance;Polarizable cations;Reaction performance;]+ catalyst;Iron,"W. Chen; Energy & Catalysis Center, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China; email: wxchen@bit.edu.cn",,,,,,Elsevier B.V.,09263373,,ACBEE,,English,Appl. Catal. B Environ.,Article,Scopus,,2-s2.0-85171137752,,China,bit.edu.cn,,,"Sui, R.; Chai, J.; Liu, X.; Pei, J.; Zhang, X.; Wang, X.; Wang, Y.; Dong, J.; Zhu, W.; Chen, W.; Zhang, L.; Zhuang, Z."
"Stanis, R.J., Kuo, M.C., Rickett, A.J., Turner, J.A., Herring, A.M.",Investigation into the activity of heteropolyacids towards the oxygen reduction reaction on PEMFC cathodes,2008,ELECTROCHIMICA ACTA,53,28,,8277,8286,10,53,10.1016/j.electacta.2008.06.052,,"[Stanis, Ronald J.; Kuo, Mei-Chen; Rickett, Adam J.; Herring, Andrew M.] Colorado Sch Mines, Dept Chem Engn, Golden, CO 80401 USA; [Stanis, Ronald J.; Turner, John A.] Natl Renewable Energy Lab, Hydrogen & Elect Syst & Infrastruct Grp, Golden, CO 80401 USA",,"A total of 18 heteropolyacids (HPAs) were investigated to determine their activity as non-Pt oxygen reduction reaction (ORR) catalysts in polymer electrolyte membrane fuel cell cathodes (PEMFCs). Polarization curves, cyclic voltammetry and impedance spectroscopy determined that, of the HPAs tested, only molybdenum based HPAs are active for the ORR and that vanadium substitutions improved the activity. The reduction potentials of the HPAs in the fuel cell environment were determined by cyclic voltammetry. This showed that no activity is seen above 0.55V, as the catalysts must first be reduced in situ by 4e(-) before the HPA can reduce oxygen. The potential at which the HPA can be reduced has been determined to be the limiting factor when using these catalysts for ORR in PEMFCs. Power densities of 67 mW/cm(2) at 0.2V were obtained using H5PMo10V20O40. Molybdenum based HPAs were covalently bonded to the carbon achieving mass loadings similar to 3 x that obtained through adsorption. Using this approach catalyst, performance was improved to 86 mW/cm(2) at 0.2 V. The increased loadings did not significantly increase the potentials at which the HPA becomes active for the ORR. We were able to show that MEA degradation, as measured by F- emission rates, using these catalysts are reduced during accelerated testing protocols. (c) 2008 Elsevier Ltd. All rights reserved.",heteropolyacid; oxygen reduction reaction; non-precious metal catalyst; proton exchange membrane fuel cell; fuel cell cathode catalyst,TRIVACANT HETEROPOLYTUNGSTATE DERIVATIVES; KEGGIN-TYPE HETEROPOLYACIDS; FUEL-CELLS; ELECTROCATALYST MATERIALS; 2-DIMENSIONAL W-183; CATALYTIC-OXIDATION; ACTIVATED CARBON; ACIDS; NMR; CO,heteropolyacid;oxygen reduction reaction;non-precious metal catalyst;proton exchange membrane fuel cell;fuel cell cathode catalyst;TRIVACANT HETEROPOLYTUNGSTATE DERIVATIVES;KEGGIN-TYPE HETEROPOLYACIDS;FUEL-CELLS;ELECTROCATALYST MATERIALS;2-DIMENSIONAL W-183;CATALYTIC-OXIDATION;ACTIVATED CARBON;ACIDS;NMR;CO,aherring@mines.edu,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000259835300026,2-s2.0-50649088598,United States,mines.edu,Colorado Sch Mines;Natl Renewable Energy Lab,"Colorado Sch Mines, United States;Natl Renewable Energy Lab, United States","Stanis, Ronald J.; Kuo, Mei-Chen; Rickett, Adam J.; Turner, John A.; Herring, Andrew M."
"Setyowati, V.A., Susanti, D., Noerochim, L., Widodo, E.W.R., Sulaiman, M.Y.",Investigation of carbon composition for electrochemical properties as pemfc cathode catalyst,2019,Materials Science Forum,964 MSF,,,13,18,,5,10.4028/www.scientific.net/MSF.964.13,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85071926372&doi=10.4028%2Fwww.scientific.net%2FMSF.964.13&partnerID=40&md5=3e3cc086fefecf455e0f700b23984486,"Institut Teknologi Adhi Tama Surabaya, Surabaya, East Java, Indonesia; Institut Teknologi Sepuluh Nopember, Surabaya, East Java, Indonesia","Setyowati, Vuri Ayu, Institut Teknologi Adhi Tama Surabaya, Surabaya, East Java, Indonesia; Susanti, Diah, Institut Teknologi Sepuluh Nopember, Surabaya, East Java, Indonesia; Noerochim, Lukman, Institut Teknologi Sepuluh Nopember, Surabaya, East Java, Indonesia; Widodo, Eriek Wahyu Restu, Institut Teknologi Adhi Tama Surabaya, Surabaya, East Java, Indonesia; Sulaiman, Mohammad Yusuf, Institut Teknologi Adhi Tama Surabaya, Surabaya, East Java, Indonesia","Nitrogen –doped carbon material using non-precious metal was developed as catalyst fuel cell (PEMFC). In the PEMFC, the cathode reaction occurs three times slower than anode reaction. Oxygen reduction reaction (ORR) in the cathode has major limit performance. Pt/C was used as high-cost catalyst materials, but many researchers are concerned to improve cathode catalyst performance using high-performance and low-cost materials. Nitrogen based active sites on carbon has important role for oxygen reduction reactions process. In this study, compositions of carbon for Fe-N-C were investigated to understand the electrochemical properties and morphological analysis. Urea and PVP as nitrogen (N) source were mixed with graphite (Gt). The ratio of Gt and N were 1:1, 3:1, and 1:3. The mixture was added to FeCl3.6H2O dissolved in ethanol to produce Fe-N/C catalyst. Subsequently, powder was induced to the furnace for pyrolysis. The catalyst products were analyzed using Potentiostat to show the electrochemical properties of catalyst, while X-Ray Diffractometer (XRD) was used to know the compound or phases after catalyst syntheses. Moreover, Scanning Electron Microscope – Energy Dispersive X-Ray (SEM-EDX) was used to identify the morphology and the chemical compositions of catalyst. As a result, Fe – Gt: N = 1:3 catalyst had the greatest electrochemical properties which is identified by the large area of CV curve. This catalyst also had the highest current density for reduction reaction. The presence of Fe2O3 and FeS caused the degreasing of catalytic activity. This research concluded that carbon composition had an important rule to improve the ORR activity. © 2019 Trans Tech Publications Ltd, Switzerland.",Fe-N-C catalyst; Fuel cell; PEMFC,Carbon; Cathodes; Chlorine compounds; Electrochemical properties; Electrolytic reduction; Fuel cells; Hematite; Morphology; Nitrogen; Oxygen; Proton exchange membrane fuel cells (PEMFC); Scanning electron microscopy; Urea; Voltage regulators; X rays; Catalyst synthesis; Chemical compositions; Energy dispersive x-ray; Morphological analysis; Non-precious metals; Oxygen reduction reaction; Reduction reaction; X ray diffractometers; Catalyst activity,Fe-N-C catalyst;Fuel cell;PEMFC;Carbon;Cathodes;Chlorine compounds;Electrochemical properties;Electrolytic reduction;Fuel cells;Hematite;Morphology;Nitrogen;Oxygen;Proton exchange membrane fuel cells (PEMFC);Scanning electron microscopy;Urea;Voltage regulators;X rays;Catalyst synthesis;Chemical compositions;Energy dispersive x-ray;Morphological analysis;Non-precious metals;Oxygen reduction reaction;Reduction reaction;X ray diffractometers;Catalyst activity,"V.A. Setyowati; Adhi Tama Surabaya Institute of Technology, Indonesia; email: vuri@itats.ac.id","Noerochim, L.",,"4th International Seminar on Science and Technology, ISST 2018",Surabaya,2018-08-09 through 2018-08-09,Trans Tech Publications Ltd ttp@transtec.ch,02555476,0878494359; 0878493506; 0878493115; 9783035711158; 9780878493739; 0878499857; 9783035714951; 0878494383; 9783037859094; 9783037854914,MSFOE,,English,Mater. Sci. Forum,Conference paper,Scopus,,2-s2.0-85071926372,,Indonesia,itats.ac.id,,,"Setyowati, V.A.; Susanti, D.; Noerochim, L.; Widodo, E.W.R.; Sulaiman, M.Y."
"Lee, B., Kim, J.G., Pak, C.",Investigation of fabrication methods for a cathode using a non-precious metal catalyst in polymer electrolyte membrane fuel cell,2020,KOREAN JOURNAL OF CHEMICAL ENGINEERING,37,12,,2334,2339,6,4,10.1007/s11814-020-0643-x,,"[Lee, Bongho; Kim, Jong Gyeong; Pak, Chanho] Gwangju Inst Sci & Technol, Inst Integrated Technol, Grad Program Energy Technol, Sch Integrated Technol, Gwangju 61005, South Korea",,"As the need for fuel cell systems increases, much research is underway to replace platinum catalysts. Therefore, non-precious metal catalysts composed of inexpensive metal have attracted attention. Along with catalyst development, the importance of electrode development is emphasized. In this study, two manufacturing methods using a commercial non-Pt catalyst (FeNC) for cathode were adopted to investigate the effect of the method on the performance of membrane electrode assembly (MEA) for polymer electrolyte membrane fuel cell (PEMFC). Additionally, the effect of different ionomer ratios in the catalyst slurry compositions on the electrode was studied. As a result, the MEA with cathode fabricated by the spray method displayed 2.87-times higher performance than that of MEA with cathode by gas diffusion electrode that is manufactured using the Doctor-blade method. The higher performance of the spray electrode is attributed to the large portions of the pores under 10 nm in the electrode estimated by the mercury intrusion porosimetry. Therefore, it is important to generate large numbers of mesopores to fabricate a high-performance electrode of the non-precious metal catalyst for PEMFC.",Non-precious Metal Catalyst; Fabrication Method; Spray Coating; Polymer Electrolyte Membrane Fuel Cell,OXYGEN REDUCTION REACTION; FE-N/C ELECTROCATALYSTS; N-X; PERFORMANCE; CARBON; COST; EFFICIENT; ENERGY; SITES; ALLOY,Non-precious Metal Catalyst;Fabrication Method;Spray Coating;Polymer Electrolyte Membrane Fuel Cell;OXYGEN REDUCTION REACTION;FE-N/C ELECTROCATALYSTS;N-X;PERFORMANCE;CARBON;COST;EFFICIENT;ENERGY;SITES;ALLOY,chanho.pak@gist.ac.kr,,"F.5, 119, ANAM-RO, SEONGBUK-GU, SEOUL 136-075, SOUTH KOREA",,,,KOREAN INSTITUTE CHEMICAL  ENGINEERS,0256-1115,,,,English,KOREAN J CHEM ENG,Article,WoS,Chemistry; Engineering,WOS:000589497700001,2-s2.0-85095950055,South Korea,gist.ac.kr,Gwangju Inst Sci & Technol,"Gwangju Inst Sci & Technol, South Korea","Lee, Bongho; Kim, Jong Gyeong; Pak, Chanho"
"Schonvogel, D., Nagappan, N.K., Bengen, N., Muller-Hulstede, J., Wagner, P.",Investigation of Pt/Fe-N-C Hybrids Towards ORR in Acidic Environment,2022,ECS Transactions,109,9,,401,411,,1,10.1149/10909.0401ecst,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85140241124&doi=10.1149%2F10909.0401ecst&partnerID=40&md5=faac89d341ec76779131bb905d92de76,"Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany","Schonvogel, Dana, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany; Nagappan, Nambi Krishnan, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany; Bengen, Nina, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany; Müller-Hülstede, Julia, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany; Wagner, Peter, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany","Metal-nitrogen-carbon (M-N-C) compounds such as Fe-N-Cs are currently the most promising platinum group metal free catalysts for oxygen reduction. Regarding the overriding goal of reducing PEM fuel cell production costs by reducing the amount of platinum, the use of Fe-N-Cs as catalytic active support is investigated in this study. Activity and stability of Pt in different contents on a commercial Fe-N-C is compared to Pt on a typical carbon black. Pt nanoparticles are well-distributed on both support classes. However, electrochemical surface and mass activity of Pt is lower on Fe-N-C compared to carbon black. Although Pt does not profit in any catalytic matter from interaction with Fe-N-C, the Pt/Fe-N-C in total has a boosting effect on ORR activity being important for future strategies to lower the Pt content in PEM fuel cells. © 2022 ECS - The Electrochemical Society.",,Electrolytic reduction; Iron compounds; Platinum; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Acidic environment; Active supports; Carbon compounds; Fuel cell production; Metal-free catalysts; Nitrogen-carbon; Oxygen Reduction; PEM fuel cell; Platinum group metals; Production cost; Carbon black,Electrolytic reduction;Iron compounds;Platinum;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Solid electrolytes;Acidic environment;Active supports;Carbon compounds;Fuel cell production;Metal-free catalysts;Nitrogen-carbon;Oxygen Reduction;PEM fuel cell;Platinum group metals;Production cost;Carbon black,,,,242nd ECS Meeting,Atlanta,2022-10-09 through 2022-10-13,Institute of Physics,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-85140241124,,Germany,No email,,,"Schonvogel, D.; Nagappan, N.K.; Bengen, N.; Muller-Hulstede, J.; Wagner, P."
"Ibrahim, F.O., Kisand, K., Douglin, J.C., Sarapuu, A., Kikas, A., Kaarik, M., Kozlova, J., Aruvali, J., Treshchalov, A., Leis, J., Kisand, V., Kukli, K., Yassin, K., Dekel, D.R., Tammeveski, K.",Ionothermal synthesis of mesoporous FeNC electrocatalysts for high-performance anion-exchange membrane fuel cells,2025,Chemical Engineering Journal,510,,161560,,,,7,10.1016/j.cej.2025.161560,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105000208461&doi=10.1016%2Fj.cej.2025.161560&partnerID=40&md5=d8bf1045dbcd986885c70b0a30de22f2,"Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Tartu Ülikooli Füüsika Instituut, Tartu, Tartumaa, Estonia; Ökoloogia ja Maateaduste Instituut, Tartu, Tartumaa, Estonia; Technion - Israel Institute of Technology, Haifa, Israel; Technion - Israel Institute of Technology, Haifa, Israel","Ibrahim, Faruq Olamilekan, Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Kisand, Kaarel, Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Douglin, John C., Technion - Israel Institute of Technology, Haifa, Israel; Sarapuu, Ave, Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Kikas, Arvo, Tartu Ülikooli Füüsika Instituut, Tartu, Tartumaa, Estonia; Käärik, Maike, Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Kozlova, Jekaterina, Tartu Ülikooli Füüsika Instituut, Tartu, Tartumaa, Estonia; Aruväli, Jaan, Ökoloogia ja Maateaduste Instituut, Tartu, Tartumaa, Estonia; Treshchalov, Aleksei B., Tartu Ülikooli Füüsika Instituut, Tartu, Tartumaa, Estonia; Leis, Jaan, Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Kisand, Vambola, Tartu Ülikooli Füüsika Instituut, Tartu, Tartumaa, Estonia; Kukli, Kaupo, Tartu Ülikooli Füüsika Instituut, Tartu, Tartumaa, Estonia; Yassin, Karam, Technion - Israel Institute of Technology, Haifa, Israel, Technion - Israel Institute of Technology, Haifa, Israel; Dekel, Dario R., Technion - Israel Institute of Technology, Haifa, Israel, Technion - Israel Institute of Technology, Haifa, Israel; Tammeveski, Kaido, Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia","The increasing global energy demand necessitates the development of sustainable electrochemical energy technologies. Anion-exchange membrane fuel cells (AEMFCs) present a promising alternative to proton-exchange membrane fuel cells (PEMFCs) due to their ability to utilize platinum-group metal (PGM)-free catalysts, which significantly reduce costs and resource dependency. In this work, we prepare various PGM-free catalysts for the oxygen reduction reaction (ORR) via an ionothermal synthesis using cyclodextrin and magnesium nitrate. The synthesis conditions were optimized and the electrocatalysts were investigated with both physical and electrochemical characterization techniques. The catalysts’ ORR performance was assessed using rotating disk electrode (RDE) measurements and single-cell AEMFC tests. The optimized FeNC-CD3 catalyst exhibited a half-wave potential of 0.90 V vs RHE in 0.1 M KOH in the RDE test and a peak power density of 599 mW cm−2 in an AEMFC, showcasing its potential as a viable alternative to conventional Pt-based cathode catalysts. This work highlights the critical role of hierarchical porosity in enhancing the ORR activity and paves the way for the development of cost-effective and efficient AEMFC technology. © 2025 Elsevier B.V.",Anion exchange membrane fuel cells; M−N−C catalysts; Non-precious metal catalysts; Oxygen reduction reaction; PGM-free catalysts,Electrolytic reduction; Ion exchange membranes; Mendelevium; Mesopores; Oxygen reduction reaction; Platinum compounds; Rhodium compounds; Anion-exchange membrane fuel cells; Ionothermal synthesis; Metal-free catalysts; M−N−C catalyst; Non-precious metal catalysts; Platinum group metals; Platinum-group metal-free catalyst; Rotating disk electrodes; ]+ catalyst; Potassium hydroxide,Anion exchange membrane fuel cells;M−N−C catalysts;Non-precious metal catalysts;Oxygen reduction reaction;PGM-free catalysts;Electrolytic reduction;Ion exchange membranes;Mendelevium;Mesopores;Platinum compounds;Rhodium compounds;Anion-exchange membrane fuel cells;Ionothermal synthesis;Metal-free catalysts;M−N−C catalyst;Platinum group metals;Platinum-group metal-free catalyst;Rotating disk electrodes;]+ catalyst;Potassium hydroxide,"K. Tammeveski; Institute of Chemistry, University of Tartu, Tartu, Ravila 14a, 50411, Estonia; email: kaido.tammeveski@ut.ee",,,,,,Elsevier B.V.,13858947,,CMEJA,,English,Chem. Eng. J.,Article,Scopus,,2-s2.0-105000208461,,Estonia;Israel,ut.ee,,,"Ibrahim, F.O.; Kisand, K.; Douglin, J.C.; Sarapuu, A.; Kikas, A.; Kaarik, M.; Kozlova, J.; Aruvali, J.; Treshchalov, A.; Leis, J.; Kisand, V.; Kukli, K.; Yassin, K.; Dekel, D.R.; Tammeveski, K."
"Muraoka, M., Tominaga, H., Nagai, M.",Iron addition to Vietnam anthracite coal and its nitrogen doping as a PEFC non-platinum cathode catalyst,2012,Fuel,102,,,359,365,,16,10.1016/j.fuel.2012.05.029,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84866463474&doi=10.1016%2Fj.fuel.2012.05.029&partnerID=40&md5=ad7a9d4cd5aefcfefb9b2a93ffa0c560,"Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan","Muraoka, Mitsuyoshi, Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan; Tominaga, Hiroyuki, Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan; Nagai, Masatoshi, Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan","The iron addition to Vietnam anthracite coal, subsequent nitrogen doping at 1073 K and its catalyst activity for the oxygen reduction reaction (ORR) were studied for application as an alternative platinum catalyst in a polymer electrolyte fuel cell. The ORR activity of the coal catalyst was determined by a three-electrode electrochemical measurement. The nitrogen doping without iron addition promoted hardly any activity of the Vietnam coal for the ORR, but the iron addition from 0.001 to 0.1 wt% caused a significant increase. The addition of 0.1 wt% iron to the Vietnam coal provided the highest ORR at 0.85 V vs. RHE at -0.005 mA/cm 2. However, the addition of 1.0 wt% iron formed several iron particles of 10-30 nm based on transmission electron microscopy measurement and decreased the ORR activity. From the X-ray photoelectron spectroscopy analysis of the non-added and iron-added Vietnam coals, the N/C, Fe/C and (Si + Al)/C ratios exhibited a maximum peak at the 0.005 wt% iron-added level, while the two latter ratios exhibited another high peak at 0.1 wt%. The nitrogen doping of Vietnam coal at 1073 K significantly increased from 5 to 1050 m 2/g surface area with 96% slit-shaped micropores and generated nitrogen species having a disordered structure. The ORR activity of the treated Vietnam coal was related to the iron, nitrogen species and the ash components, such as Si and Al. The active structure of the iron added coal-derived electrocatalysts was discussed. © 2012 Elsevier Ltd. All rights reserved.",Iron addition; Nitrogen doping; Non-precious metal catalyst; PEFC; Vietnam anthracite coal,Active structures; Ash components; Cathode catalyst; Disordered structures; Electrochemical measurements; Iron Particles; Micropores; Nitrogen species; Nitrogen-doping; Non-platinum; Non-precious metal catalysts; Oxygen reduction reaction; PEFC; Platinum catalysts; Polymer electrolyte fuel cells; Surface area; Viet Nam; Catalyst activity; Coal; Electrocatalysts; Electrolytic reduction; Nitrogen; Photoelectrons; Platinum; Precious metals; Proton exchange membrane fuel cells (PEMFC); Silicon; Transmission electron microscopy; X ray photoelectron spectroscopy; Iron,Iron addition;Nitrogen doping;Non-precious metal catalyst;PEFC;Vietnam anthracite coal;Active structures;Ash components;Cathode catalyst;Disordered structures;Electrochemical measurements;Iron Particles;Micropores;Nitrogen species;Nitrogen-doping;Non-platinum;Non-precious metal catalysts;Oxygen reduction reaction;Platinum catalysts;Polymer electrolyte fuel cells;Surface area;Viet Nam;Catalyst activity;Coal;Electrocatalysts;Electrolytic reduction;Nitrogen;Photoelectrons;Platinum;Precious metals;Proton exchange membrane fuel cells (PEMFC);Silicon;Transmission electron microscopy;X ray photoelectron spectroscopy;Iron,"M. Nagai; Graduate School of Bio-applications and Systems Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, 2-24 Nakamachi, Japan; email: mnagai@cc.tuat.ac.jp",,,,,,,00162361,,FUELA,,English,Fuel,Article,Scopus,,2-s2.0-84866463474,,Japan,cc.tuat.ac.jp,,,"Muraoka, M.; Tominaga, H.; Nagai, M."
"Kisand, K., Sarapuu, A., Akula, S., Kikas, A., Treshchalov, A., Kaarik, M., Piirsoo, H.M., Kozlova, J., Aruvali, J., Leis, J., Kisand, V., Kukli, K., El Chawich, G., Cavaliere, S., Tammeveski, K.",Iron and manganese co-doped mesoporous carbon-based catalysts via template-assisted synthesis for proton exchange membrane fuel cells,2024,JOURNAL OF POWER SOURCES,618,,235166,,,9,11,10.1016/j.jpowsour.2024.235166,,"[Kisand, Kaarel; Sarapuu, Ave; Akula, Srinu; Kaarik, Maike; Leis, Jaan; Tammeveski, Kaido] Univ Tartu, Inst Chem, Ravila 14a, EE-50411 Tartu, Estonia; [Kikas, Arvo; Treshchalov, Alexey; Piirsoo, Helle-Mai; Kozlova, Jekaterina; Kisand, Vambola; Kukli, Kaupo] Univ Tartu, Inst Phys, W Ostwald Str 1, EE-50411 Tartu, Estonia; [Aruvali, Jaan] Univ Tartu, Inst Ecol & Earth Sci, Vanemuise 46, EE-51014 Tartu, Estonia; [Kukli, Kaupo; El Chawich, Ghenwa; Cavaliere, Sara] Univ Montpellier, ICGM, CNRS, ENSCM, Montpellier, France",,"This work explores a novel and sustainable synthesis strategy for developing platinum-group metal (PGM)-free catalysts with high electrocatalytic activity, emphasizing the significance of hierarchically porous structures to improve electrocatalytic performance. We present an easily scalable method that utilizes magnesium salt as the precursor of sacrificial template to synthesize mesoporous carbon-based catalysts. The catalysts are doped with nitrogen and iron, while manganese is added to increase the stability of the catalyst under highly corrosive acidic conditions. The electrochemical oxygen reduction reaction (ORR) is investigated in acidic media using the rotating disk electrode technique. The electrocatalytic activity of the prepared catalysts is evaluated in proton exchange membrane fuel cell (PEMFC), where a significant increase in performance is achieved with the hierarchically porous carbon catalyst. The results demonstrate the potential of these catalysts as efficient and durable alternatives to PGM-based cathode catalysts in PEMFCs.",Oxygen reduction reaction; M-N-C catalysts; PGM-free catalysts; Sacrificial template; Mesoporous carbon; Proton-exchange membrane fuel cell,OXYGEN REDUCTION REACTION; METAL-CATALYSTS; POROUS CARBONS; PORE STRUCTURE; PERFORMANCE; ELECTRODE; SITES,Oxygen reduction reaction;M-N-C catalysts;PGM-free catalysts;Sacrificial template;Mesoporous carbon;Proton-exchange membrane fuel cell;METAL-CATALYSTS;POROUS CARBONS;PORE STRUCTURE;PERFORMANCE;ELECTRODE;SITES,kaido.tammeveski@ut.ee,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:001291025800001,2-s2.0-85200599083,Estonia;France,ut.ee,Univ Tartu;Univ Montpellier,"Univ Tartu, Estonia;Univ Montpellier, France","Kisand, Kaarel; Sarapuu, Ave; Akula, Srinu; Kikas, Arvo; Treshchalov, Alexey; Kaarik, Maike; Piirsoo, Helle-Mai; Kozlova, Jekaterina; Aruvali, Jaan; Leis, Jaan; Kisand, Vambola; Kukli, Kaupo; El Chawich, Ghenwa; Cavaliere, Sara; Tammeveski, Kaido"
"Xu, J.C., Liang, G.F., Chen, D., Li, Z.L., Zhang, H., Chen, J., Xie, F.Y., Jin, Y.S., Wang, N., Meng, H.",Iron and nitrogen doped carbon derived from ferrocene and ZIF-8 as proton exchange membrane fuel cell cathode catalyst,2022,APPLIED SURFACE SCIENCE,573,,151607,,,8,21,10.1016/j.apsusc.2021.151607,,"[Xu, Jinchang; Liang, Guofeng; Chen, Di; Li, Zilong; Jin, Yanshuo; Wang, Nan; Meng, Hui] Jinan Univ, Guangdong Prov Engn Technol Res Ctr Vacuum Coatin, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Dept Phys,Siyuan Lab,Guangzhou Key Lab Vacuum Coa, Guangzhou 510632, Guangdong, Peoples R China; [Zhang, Hao; Chen, Jian; Xie, Fangyan] Sun Yat Sen Univ, Instrumental Anal & Res Ctr, Guangzhou 510275, Guangdong, Peoples R China",,"H2-O2 proton exchange membrane fuel cells (PEMFCs), one of the applications of hydrogen energy with specific energy density of 143 MJ/kg, might be a promising alternative to replace the use of fossil energy. The key to accelerate the application of PEMFCs is to design an efficient non-precious metal catalyst to lower the overpotential of the cathode oxygen reduction reaction (ORR). Herein, we developed a novel iron and nitrogen doped carbon (FeNC) catalyst using ferrocene as iron source, ZIF-8 as organic framework as well as the main carbon source. The regular morphology of ZIF-8 and ferrocene can prevent active sites from agglomeration, resulting a homogenous distribution of Fe, N and C. Moreover, the high specific area, porous structure and abundant catalytic Fe and N species gave rise to the ORR performance of the catalyst. As a result, the as-prepared FeNC catalyst showed an onset and half-wave potential of 0.95 V and 0.78 V in 0.1 M HClO4 with 1600 rpm, respectively. The catalysts were also applied in a PEMFC as the cathode catalysts with an open circuit voltage of more than 0.9 V and a maximum power density of 601 mW/cm2. Additionally, the as-prepared FeNC-1:30 catalyst showed a current density of 380 mA/cm2 at 0.7 V, which outperformed other as-prepared catalysts.",Oxygen reduction reaction; Precious-metal-free catalyst; PEMFCs,OXYGEN REDUCTION REACTION; NONPRECIOUS-METAL-CATALYSTS; POROUS CARBON; ELECTROCATALYST; PERFORMANCE,Oxygen reduction reaction;Precious-metal-free catalyst;PEMFCs;NONPRECIOUS-METAL-CATALYSTS;POROUS CARBON;ELECTROCATALYST;PERFORMANCE,nanwang@jnu.edu.cn; tmh@jnu.edu.cn,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0169-4332,,,,English,APPL SURF SCI,Article,WoS,Chemistry; Materials Science; Physics,WOS:000729952900003,2-s2.0-85117330172,China,jnu.edu.cn,Jinan Univ;Sun Yat Sen Univ,"Jinan Univ, China;Sun Yat Sen Univ, China","Xu, Jinchang; Liang, Guofeng; Chen, Di; Li, Zilong; Zhang, Hao; Chen, Jian; Xie, Fangyan; Jin, Yanshuo; Wang, Nan; Meng, Hui"
"Qiu, W., Han, Q., Yu, X., Xiang, Z.",Iron Atom-Cluster Strategy Synthesis of Hierarchically Porous Fe–N–C Catalysts for Proton Exchange Membrane Fuel Cells,2023,Transactions of Tianjin University,29,6,,453,461,,8,10.1007/s12209-023-00372-z,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85177065557&doi=10.1007%2Fs12209-023-00372-z&partnerID=40&md5=6ebec3bab12f14b6fe42d169a62cf82d,"State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China","Qiu, Wenhao, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Han, Qing, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Yu, Xiaogang, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Xiang, Zhonghua, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China","Developing nonprecious metal-nitrogen-doped carbon (M–N–C) catalysts with high activity and stability is critical to their widespread use in fuel cells; however, these catalysts still face considerable challenges. Herein, a novel iron atom-cluster strategy for the synthesis of iron-based N–C catalyst comprising Fe nanoparticles (Fe NPs) surrounded by Fe-N<inf> x</inf> sites is developed for oxygen reduction reactions in an acidic fuel cell. Iron oxide NPs were incorporated into zeolitic imidazolate framework-8 (ZIF-8)-derived carbon materials and pyrolyzed at high temperatures using NaCl as a modifier to produce Fe NPs and Fe-N<inf> x</inf> composite active sites. The half-wave potential of the optimized Fe<inf>NP</inf>/FeNC-NaCl material was substantially improved to 0.81 V. Furthermore, even after 15,000 cycles, the half-wave potential of the catalyst remained essentially unchanged. As a cathode catalyst for fuel cells, it realized a high peak power density of 436 mW/cm2 under a practical H<inf>2</inf>-air atmosphere. Therefore, this study presents a new approach for designing and synthesizing electrocatalytic materials with high catalytic activity and stability. © 2023, The Author(s) under exclusive licence to Tianjin University.",Fe–N-doped carbon; Fuel cell; Iron atom clusters; Oxygen reduction reaction; Pyrolysis synthesis,Atoms; Carbon; Catalyst activity; Doping (additives); Electrolytic reduction; Gas fuel purification; Iron oxides; Nanocatalysts; Oxygen; Proton exchange membrane fuel cells (PEMFC); Pyrolysis; Sodium chloride; Atom clusters; Doped carbons; Fe nanoparticles; Fe–N-doped carbon; Iron atom cluster; Iron atoms; N-doped; Oxygen reduction reaction; Pyrolyse synthesis; ]+ catalyst; Synthesis (chemical),Fe–N-doped carbon;Fuel cell;Iron atom clusters;Oxygen reduction reaction;Pyrolysis synthesis;Atoms;Carbon;Catalyst activity;Doping (additives);Electrolytic reduction;Gas fuel purification;Iron oxides;Nanocatalysts;Oxygen;Proton exchange membrane fuel cells (PEMFC);Pyrolysis;Sodium chloride;Atom clusters;Doped carbons;Fe nanoparticles;Iron atom cluster;Iron atoms;N-doped;Pyrolyse synthesis;]+ catalyst;Synthesis (chemical),"Z. Xiang; State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China; email: xiangzh@mail.buct.edu.cn",,,,,,Tianjin University,10064982,,TTUNE,,English,Trans. Tianjin Univ.,Article,Scopus,,2-s2.0-85177065557,,China,mail.buct.edu.cn,,,"Qiu, W.; Han, Q.; Yu, X.; Xiang, Z."
"Lefevre, M., Proietti, E., Jaouen, F., Dodelet, J.P.",Iron-based Catalysts for Oxygen Reduction in PEM Fuel Cells: Expanded Study Using the Pore-filling Method,2009,PROTON EXCHANGE MEMBRANE FUEL CELLS 9,25,1,,105,115,11,14,10.1149/1.3210563,,"[Lefevre, Michel; Proietti, Eric; Jaouen, Frederic; Dodelet, Jean-Pol] INRS Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada",,"Fe/N/C catalysts for the oxygen reduction reaction (ORR) in PEM fuel cells were synthesized via a new method. A catalyst precursor was first prepared by filling the pores of a microporous carbon black with a mixture of pore-filler (organic molecules) and iron precursor by means of planetary ballmilling. The resulting catalyst precursor was then pyrolysed either in NH3 only or, first in Ar and then in NH3. Various pore-fillers and carbon blacks were investigated. The ORR activity in fuel cell is influenced by (i) the type and mass ratio of the pore-filler and the nominal loading of iron in the catalyst precursor and (ii) the micropore surface area and nitrogen content in the catalyst. The highest kinetic activity obtained in fuel cell at 0.8 V iR-free is 429 A g(-1) using 1 wt% nominal iron loading, phenanthroline as the pore-filler and Black Pearls 2000 as the microporous carbon black.",,HEAT-TREATMENT AFFECT; O-2 REDUCTION; NONNOBLE ELECTROCATALYSTS; PART I; FE; PYROLYSIS; ELECTROREDUCTION; TEMPERATURE; FE/N/C; MODEL,HEAT-TREATMENT AFFECT;O-2 REDUCTION;NONNOBLE ELECTROCATALYSTS;PART I;FE;PYROLYSIS;ELECTROREDUCTION;TEMPERATURE;FE/N/C;MODEL,,"Fuller, T; Uchida, H; Strasser, P; Shirvanian, P; Lamy, C; Hartnig, C; Gasteiger, HA; Zawodzinski, T; Jarvi, T; Bele, P; Ramani, V; Cleghorn, S; Jones, D; Zelenay, P","65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA",9th Proton Exchange Membrane Fuel Cell Symposium (PEMFC) Conducted Under the Auspices of the 216th Meeting of the Electrochemical-Society-Inc,"Vienna, AUSTRIA","OCT 04-09, 2009",ELECTROCHEMICAL SOC INC,1938-5862,978-1-60768-088-8,,,English,ECS TRANSACTIONS,Proceedings Paper,WoS,Electrochemistry; Energy & Fuels,WOS:000329585500010,2-s2.0-77649260914,Canada,No email,INRS Energie Mat & Telecommun,"INRS Energie Mat & Telecommun, Canada","Lefevre, Michel; Proietti, Eric; Jaouen, Frederic; Dodelet, Jean-Pol"
"Lefevre, M., Proietti, E., Jaouen, F., Dodelet, J.P.",Iron-Based Catalysts with Improved Oxygen Reduction Activity in Polymer Electrolyte Fuel Cells,2009,SCIENCE,324,5923,,71,74,4,3131,10.1126/science.1170051,,"[Lefevre, Michel; Proietti, Eric; Jaouen, Frederic; Dodelet, Jean-Pol] Inst Natl Rech Sci Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada",,"Iron-based catalysts for the oxygen-reduction reaction in polymer electrolyte membrane fuel cells have been poorly competitive with platinum catalysts, in part because they have a comparatively low number of active sites per unit volume. We produced microporous carbon-supported iron-based catalysts with active sites believed to contain iron cations coordinated by pyridinic nitrogen functionalities in the interstices of graphitic sheets within the micropores. We found that the greatest increase in site density was obtained when a mixture of carbon support, phenanthroline, and ferrous acetate was ball-milled and then pyrolyzed twice, first in argon, then in ammonia. The current density of a cathode made with the best iron-based electrocatalyst reported here can equal that of a platinum-based cathode with a loading of 0.4 milligram of platinum per square centimeter at a cell voltage of >= 0.9 volt.",,HEAT-TREATMENT AFFECT; CATHODE CATALYST; NONNOBLE ELECTROCATALYSTS; SPUTTER-DEPOSITION; FE/N/C CATALYSTS; O-2 REDUCTION; CARBON-BLACKS; SITE; ORR; ELECTROREDUCTION,HEAT-TREATMENT AFFECT;CATHODE CATALYST;NONNOBLE ELECTROCATALYSTS;SPUTTER-DEPOSITION;FE/N/C CATALYSTS;O-2 REDUCTION;CARBON-BLACKS;SITE;ORR;ELECTROREDUCTION,dodelet@emt.inrs.ca,,"1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA",,,,AMER ASSOC ADVANCEMENT SCIENCE,0036-8075,,,19342583,English,SCIENCE,Article,WoS,Science & Technology - Other Topics,WOS:000264802100033,,Canada,emt.inrs.ca,Inst Natl Rech Sci Energie Mat & Telecommun,"Inst Natl Rech Sci Energie Mat & Telecommun, Canada","Lefevre, Michel; Proietti, Eric; Jaouen, Frederic; Dodelet, Jean-Pol"
"Proietti, E., Jaouen, F., Lefevre, M., Larouche, N., Tian, J., Herranz, J., Dodelet, J.P.",Iron-based cathode catalyst with enhanced power density in polymer electrolyte membrane fuel cells,2011,NATURE COMMUNICATIONS,2,,416,,,9,1425,10.1038/ncomms1427,,"[Proietti, Eric; Jaouen, Frederic; Lefevre, Michel; Larouche, Nicholas; Tian, Juan; Herranz, Juan; Dodelet, Jean-Pol] Inst Natl Rech Sci Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada; [Proietti, Eric; Lefevre, Michel] Canet Electrocatalysis Inc, Varennes, PQ J3X 1S2, Canada",,"H-2-air polymer-electrolyte-membrane fuel cells are electrochemical power generators with potential vehicle propulsion applications. To help reduce their cost and encourage widespread use, research has focused on replacing the expensive Pt-based electrocatalysts in polymer-electrolyte-membrane fuel cells with a lower-cost alternative. Fe-based cathode catalysts are promising contenders, but their power density has been low compared with Pt-based cathodes, largely due to poor mass-transport properties. Here we report an iron-acetate/phenanthroline/zeolitic-imidazolate-framework-derived electrocatalyst with increased volumetric activity and enhanced mass-transport properties. The zeolitic-imidazolate-framework serves as a microporous host for phenanthroline and ferrous acetate to form a catalyst precursor that is subsequently heat treated. A cathode made with the best electrocatalyst from this work, tested in H-2-O-2, has a power density of 0.75 W cm(-2) at 0.6 V, a meaningful voltage for polymer-electrolyte-membrane fuel cells operation, comparable with that of a commercial Pt-based cathode tested under identical conditions.",,OXYGEN REDUCTION CATALYSTS; HYDROGEN STORAGE; FE/N/C CATALYSTS; METAL CATALYST; CARBON-BLACKS; ELECTROCATALYSTS; PERFORMANCE; POLYANILINE; STABILITY; FUTURE,OXYGEN REDUCTION CATALYSTS;HYDROGEN STORAGE;FE/N/C CATALYSTS;METAL CATALYST;CARBON-BLACKS;ELECTROCATALYSTS;PERFORMANCE;POLYANILINE;STABILITY;FUTURE,michel.lefevre@canetique.com; dodelet@emt.inrs.ca,,"MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND",,,,NATURE PUBLISHING GROUP,2041-1723,,,21811245,English,NAT COMMUN,Article,WoS,Science & Technology - Other Topics,WOS:000294806500009,,Canada,canetique.com,Inst Natl Rech Sci Energie Mat & Telecommun;Canet Electrocatalysis Inc,"Inst Natl Rech Sci Energie Mat & Telecommun, Canada;Canet Electrocatalysis Inc, Canada","Proietti, Eric; Jaouen, Frederic; Lefevre, Michel; Larouche, Nicholas; Tian, Juan; Herranz, Juan; Dodelet, Jean-Pol"
"Wang, X.X., Prabhakaran, V., He, Y.H., Shao, Y.Y., Wu, G.",Iron-Free Cathode Catalysts for Proton-Exchange-Membrane Fuel Cells: Cobalt Catalysts and the Peroxide Mitigation Approach,2019,ADVANCED MATERIALS,31,31,1805126,,,18,249,10.1002/adma.201805126,,"[Wang, Xiao Xia; He, Yanghua; Wu, Gang] Univ Buffalo State Univ New York, Dept Chem & Biol Engn, Buffalo, NY 14260 USA; [Wang, Xiao Xia] East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China; [Prabhakaran, Venkateshkurnor; Shao, Yuyan] Pacific Northwest Natl Lab, Richland, WA 99352 USA",,"High-performance and inexpensive platinum-group-metal (PGM)-free catalysts for the oxygen reduction reaction (ORR) in challenging acidic media are crucial for proton-exchange-membrane fuel cells (PEMFCs). Catalysts based on Fe and N codoped carbon (Fe-N-C) have demonstrated promising activity and stability. However, a serious concern is the Fenton reactions between Fe2+ and H2O2 generating active free radicals, which likely cause degradation of the catalysts, organic ionomers within electrodes, and polymer membranes used in PEMFCs. Alternatively, Co-N-C catalysts with mitigated Fenton reactions have been explored as a promising replacement for Fe and PGM catalysts. Therefore, herein, the focus is on Co-N-C catalysts for the ORR relevant to PEMFC applications. Catalyst synthesis, structure/morphology, activity and stability improvement, and reaction mechanisms are discussed in detail. Combining experimental and theoretical understanding, the aim is to elucidate the structure-property correlations and provide guidance for rational design of advanced Co catalysts with a special emphasis on atomically dispersed single-metal-site catalysts. In the meantime, to reduce H2O2 generation during the ORR on the Co catalysts, potential strategies are outlined to minimize the detrimental effect on fuel cell durability.",Co catalysts; fuel cells; H2O2 mitigation; oxygen reduction; PGM-free catalysts,OXYGEN-REDUCTION REACTION; NONPRECIOUS METAL-CATALYSTS; DOPED CARBON NANOFIBERS; CO-N-C; IMIDAZOLATE FRAMEWORK; HYDROGEN-PEROXIDE; TRANSITION-METAL; DEGRADATION MITIGATION; IONOMER DEGRADATION; ORGANIC FRAMEWORK,Co catalysts;fuel cells;H2O2 mitigation;oxygen reduction;PGM-free catalysts;OXYGEN-REDUCTION REACTION;NONPRECIOUS METAL-CATALYSTS;DOPED CARBON NANOFIBERS;CO-N-C;IMIDAZOLATE FRAMEWORK;HYDROGEN-PEROXIDE;TRANSITION-METAL;DEGRADATION MITIGATION;IONOMER DEGRADATION;ORGANIC FRAMEWORK,Yuyan.Shao@pnnl.gov; gangwu@buffalo.edu,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,0935-9648,,,30706548,English,ADV MATER,Review,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000484129400015,2-s2.0-85060870654,United States;China,pnnl.gov,Univ Buffalo State Univ New York;East China Univ Sci & Technol;Pacific Northwest Natl Lab,"Univ Buffalo State Univ New York, United States;East China Univ Sci & Technol, China;Pacific Northwest Natl Lab, United States","Wang, Xiao Xia; Prabhakaran, Venkateshkurnor; He, Yanghua; Shao, Yuyan; Wu, Gang"
"Asset, T., Atanassov, P.",Iron-Nitrogen-Carbon Catalysts for Proton Exchange Membrane Fuel Cells,2020,JOULE,4,1,,33,44,12,348,10.1016/j.joule.2019.12.002,,"[Asset, Tristan; Atanassov, Plamen] Univ Calif Irvine, Chem & Biomol Engn, Irvine, CA 92697 USA; [Asset, Tristan; Atanassov, Plamen] Univ Calif Irvine, Natl Fuel Cell Res Ctr, Irvine, CA 92697 USA",,"Fuel cell technology is on its verge of deployment as one of the solutions for decarbonization of transportation. It currently uses platinum-based catalysts, being the largest materials cost factor, subject to market volatility, limited availability, and unfavorable geopolitical source location, Hence, Earth-abundant elements-based materials, and among those, platinum-free catalysts, could be an ultimate solution. Among several such catalysts, the transition-metal nitrogen-carbon ones have shown adequate activity and promise in durability, the latest being the most vulnerable treat, Recent years have seen initial successes in incorporation of iron-nitrogencarbon catalysts in fuel cells and their evaluation under automotive relevant conditions. The catalysts can be described as N-doped, graphene-like carbonaceous materials, with transition metal atomically dispersed and associated with the pyridinic nitrogen-containing in-plane or edge defects in graphene. Here, we provide a view on these materials' chemical composition and morphology that provide for the reactivity and stability of transition-metal-containing active sites.",,OXYGEN REDUCTION REACTION; HIGH ELECTROCATALYTIC ACTIVITY; N-C CATALYSTS; ACTIVE-SITES; FE/N/C-CATALYSTS; METAL-CATALYSTS; PERFORMANCE; ALKALINE; ORR; IDENTIFICATION,OXYGEN REDUCTION REACTION;HIGH ELECTROCATALYTIC ACTIVITY;N-C CATALYSTS;ACTIVE-SITES;FE/N/C-CATALYSTS;METAL-CATALYSTS;PERFORMANCE;ALKALINE;ORR;IDENTIFICATION,plamen.atanassov@uci.edu,,"50 HAMPSHIRE ST, FLOOR 5, CAMBRIDGE, MA 02139 USA",,,,CELL PRESS,2542-4351,,,,English,JOULE,Review,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000507640500009,2-s2.0-85077505152,United States,uci.edu,Univ Calif Irvine,"Univ Calif Irvine, United States","Asset, Tristan; Atanassov, Plamen"
"Wang, K., Chen, H., Zhang, X., Tong, Y., Song, S., Tsiakaras, P., Wang, Y.",Iron oxide@graphitic carbon core-shell nanoparticles embedded in ordered mesoporous N-doped carbon matrix as an efficient cathode catalyst for PEMFC,2020,Applied Catalysis B: Environmental,264,,118468,,,,88,10.1016/j.apcatb.2019.118468,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85075967256&doi=10.1016%2Fj.apcatb.2019.118468&partnerID=40&md5=f3da10eed1e03d433fc53b548283bcd0,"Key Laboratory of Low-carbon Chemistry and Energy Conservation of Guangdong Province, Sun Yat-Sen University, Guangzhou, Guangdong, China; Institute of High Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Sverdlovskaya, Russian Federation; Ural Federal University, Yekaterinburg, Sverdlovskaya, Russian Federation; Department of Mechanical Engineering, University of Thessaly, Volos, Thessaly, Greece","Wang, Kun, Key Laboratory of Low-carbon Chemistry and Energy Conservation of Guangdong Province, Sun Yat-Sen University, Guangzhou, Guangdong, China; Chen, Haixin, Key Laboratory of Low-carbon Chemistry and Energy Conservation of Guangdong Province, Sun Yat-Sen University, Guangzhou, Guangdong, China; Zhang, Xiaofeng, Key Laboratory of Low-carbon Chemistry and Energy Conservation of Guangdong Province, Sun Yat-Sen University, Guangzhou, Guangdong, China; Tong, Yexiang, Key Laboratory of Low-carbon Chemistry and Energy Conservation of Guangdong Province, Sun Yat-Sen University, Guangzhou, Guangdong, China; Song, Shuqin, Key Laboratory of Low-carbon Chemistry and Energy Conservation of Guangdong Province, Sun Yat-Sen University, Guangzhou, Guangdong, China; Tsiakaras, P. E., Institute of High Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Sverdlovskaya, Russian Federation, Ural Federal University, Yekaterinburg, Sverdlovskaya, Russian Federation, Department of Mechanical Engineering, University of Thessaly, Volos, Thessaly, Greece; Wang, Yi, Key Laboratory of Low-carbon Chemistry and Energy Conservation of Guangdong Province, Sun Yat-Sen University, Guangzhou, Guangdong, China","Developing electrocatalysts with high activity and long-term stability towards oxygen reduction reaction (ORR) in acidic media is still an important topic. However, most of the already reported non-precious-metal catalysts (NPMCs) for ORR exhibit excellent performance in basic media. In the present work, we report a newly designed FeO<inf>x</inf>@graphitic carbon core-shell structured nanoparticles implanted in N-doped carbon matrix, with ordered and mesoporous structure (FeO<inf>x</inf>@GC-NOMC), which i) exhibits a better electrocatalytic activity in acidic media, ii) follows a four-electron ORR process, and iii) shows superior stability and inertness to methanol when compared with commercial Pt/C (20 wt %). These features are mostly attributed to the following two points: i) the ordered mesoporous carbon matrix can not only be favorable for the rapid transfer and active sites exposure, but also limit the embedded nanoparticles size and avoid its agglomeration, and ii) the high content of “Fe-N” active sites, and the core-shell structure of embedded nanoparticles (FeO<inf>x</inf>@GC) can protect the active sites from the corrosion of harsh conditions and ensure the long-term durability. It is found that the as-prepared FeO<inf>x</inf>@GC-NOMC shows one of the best H<inf>2</inf>-O<inf>2</inf> PEMFC single-cell performances, among all thetested and currently reported NPMCs, as well as a long-term durability. More precisely, at an open circuit potential of ca. 1 V, the peak power density reaches up to 350 W g−1 (1050 mW cm-2 based on active area). A slight current decay is observed after a chronoamperometric test of 120 h. The above features make FeO<inf>x</inf>@GC-NOMC a promising potential alternative to Pt/C for ORR electrocatalysis in practical fuel cell applications. © 2019 Elsevier B.V.",Efficient ORR catalysis; Long-term stability; Non-precious metal catalysts; PEMFC performance,Carbon; Catalysis; Core shell nanoparticles; Corrosion protection; Doping (additives); Durability; Electrocatalysis; Electrocatalysts; Electrolytic reduction; Iron oxides; Mesoporous materials; Nanoparticles; Precious metals; Proton exchange membrane fuel cells (PEMFC); Shells (structures); Electrocatalytic activity; Embedded nanoparticles; Long term stability; Mesoporous structures; Non-precious metal catalysts; Open circuit potential; Ordered mesoporous carbon; Single cell performance; Oxygen reduction reaction,Efficient ORR catalysis;Long-term stability;Non-precious metal catalysts;PEMFC performance;Carbon;Catalysis;Core shell nanoparticles;Corrosion protection;Doping (additives);Durability;Electrocatalysis;Electrocatalysts;Electrolytic reduction;Iron oxides;Mesoporous materials;Nanoparticles;Precious metals;Proton exchange membrane fuel cells (PEMFC);Shells (structures);Electrocatalytic activity;Embedded nanoparticles;Long term stability;Mesoporous structures;Open circuit potential;Ordered mesoporous carbon;Single cell performance;Oxygen reduction reaction,"S. Song; MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, School of Chemistry, School of Materials Science and Engineering, School of Chemical Engineering and Technology, Sun Yat-sen University, Guangzhou, 510275, China; email: stsssq@mail.sysu.edu.cn",,,,,,Elsevier B.V.,09263373,,ACBEE,,English,Appl. Catal. B Environ.,Article,Scopus,,2-s2.0-85075967256,,China;Russian Federation;Greece,mail.sysu.edu.cn,,,"Wang, K.; Chen, H.; Zhang, X.; Tong, Y.; Song, S.; Tsiakaras, P.; Wang, Y."
"Wu, Y., Chen, J., Liu, J., Zhang, L., Abazari, R., Li, T.T., Qian, J.",Iron phthalocyanine coupled with Co-Nx sites in carbon nanostraws for Zn-Air batteries,2025,Chemical Engineering Journal,503,,158343,,,,49,10.1016/j.cej.2024.158343,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85211147941&doi=10.1016%2Fj.cej.2024.158343&partnerID=40&md5=2e1834c38bdf2e84ac453b778ad451db,"College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, China; School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, China; State Key Laboratory of Structural Chemistry, Fuzhou, Fuzhou, Fujian, China; Department of Chemistry, University of Maragheh, Maragheh, Iraq","Wu, Yi, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, China; Chen, Junliang, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, China; Liu, Jie, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, China; Zhang, Linjie, State Key Laboratory of Structural Chemistry, Fuzhou, Fuzhou, Fujian, China; Abazari, Reza, Department of Chemistry, University of Maragheh, Maragheh, Iraq; Li, Tingting, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, China; Qian, Jinjie, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, China","The energy crisis heightens interest in proton exchange membrane fuel cells (PEMFCs), where the oxygen reduction reaction (ORR) is a critical cathodic process hindered by its intrinsic sluggish kinetics. Single-atom catalysts (SACs) at the molecular level, notably those featuring an Fe-N<inf>4</inf> structure derived from iron phthalocyanine (FePc), exhibit significant potential but confront the challenges of aggregation and inadequate electrical conductivity. Herein, we present a novel FePc coupled with defect-rich CoN<inf>x</inf>-doped hollow carbon nanostraw derived from cobalt-doped indium-based metal–organic frameworks (MOFs). This enhancement is attributed to the CoN<inf>x</inf> structure's effective modulation of the Fe-N<inf>4</inf> active sites, further complemented by the hollow nanostraw structure, which significantly increases the accessibility of active sites, thereby promoting enhanced catalytic performance. FePc@HCoNC demonstrates exceptional ORR performance with an oxygen reduction potential of 0.903 V, half-wave potential of 0.914 V, and limiting current density of 5.18 mA cm−2. For zinc-air batteries (ZABs), FePc@HCoNC achieves an open-circuit voltage of 1.524 V, peak power density of 153.06 mW cm−2, specific capacity of 758.10 mAh g−1, and stable cycling for 150 h. These findings underscore its potential as a superior alternative to precious metal-based catalysts, offering a pathway to more sustainable and efficient energy conversion technologies. © 2024 Elsevier B.V.",CoNx sites Single-atom catalyst; Hollow carbon nanomaterial; Indium-organic framework; Oxygen reduction reaction,Defect density; Electrolytic reduction; Indium; Nanosaws; Oxygen reduction reaction; Zinc alloys; Active site; Carbon nano-materials; CoNx site single-atom catalyst; Hollow carbon nanomaterial; Indium-organic framework; Iron phthalocyanines; Organics; Single-atoms; ]+ catalyst; Zinc air batteries,CoNx sites Single-atom catalyst;Hollow carbon nanomaterial;Indium-organic framework;Oxygen reduction reaction;Defect density;Electrolytic reduction;Indium;Nanosaws;Zinc alloys;Active site;Carbon nano-materials;CoNx site single-atom catalyst;Iron phthalocyanines;Organics;Single-atoms;]+ catalyst;Zinc air batteries,"R. Abazari; Department of Chemistry, Faculty of Science, University of Maragheh, Maragheh, 55181-83111, Iraq; email: reza.abazari@maragheh.ac.ir",,,,,,Elsevier B.V.,13858947,,CMEJA,,English,Chem. Eng. J.,Article,Scopus,,2-s2.0-85211147941,,China;Iraq,maragheh.ac.ir,,,"Wu, Y.; Chen, J.; Liu, J.; Zhang, L.; Abazari, R.; Li, T.-T.; Qian, J."
"Zhang, L., Jiao, X., He, G., Shen, Z., Wang, W.",Iron phthalocyanine decorated porous biomass-derived carbon as highly effective electrocatalyst for oxygen reduction reaction,2023,Journal of Environmental Chemical Engineering,11,3,109676,,,,21,10.1016/j.jece.2023.109676,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85150341393&doi=10.1016%2Fj.jece.2023.109676&partnerID=40&md5=31cc55b096bdf5d399138403d4d1b602,"School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu, China","Zhang, Lingwei, School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu, China; Jiao, Xvdong, School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu, China; He, Guangjing, School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu, China; Shen, Zhaodi, School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu, China; Wang, Wei, School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu, China","Searching for a low-cost, high-activity and stable nonprecious metal electrocatalyst for the oxygen reduction reaction (ORR) is critical to the application of energy conversion devices, such as zinc-air batteries and proton exchange membrane fuel cells. Herein, renewable and inexpensive black locust leaves were used as carbon and nitrogen precursors to prepare porous biomass-derived carbon (PBC) using K<inf>2</inf>FeO<inf>4</inf> as the activator and then decorated by iron phthalocyanine (FePc) with a free-pyrolysis process to obtain the electrocatalyst FePc<inf>x</inf>/PBC. Notably, the as-obtained PBC possesses a large specific surface area and hierarchically porous structure, facilitating the exposure of active sites and diffusion of O<inf>2</inf> as well as the electrolytes during the ORR process. Compared with commercial Pt/C, the half-wave potential (E<inf>1/2</inf> =0.91 V) and limiting current density (J<inf>L</inf>=5.03 mA·cm−2) of FePc<inf>0.5</inf>/PBC positively shifted nearly 70 mV and increased 0.44 mA·cm−2 respectively, and an obvious enhancement in stability and tolerance to methanol can be observed. Moreover, the assembled zinc-air battery using FePc<inf>0.5</inf>/PBC as the air-cathode catalyst exhibits an open-circuit voltage of 1.452 V and a specific capacity of 812.1 mAh·g−1, much higher than those of Pt/C (1.435 V, 749.4 mAh·g−1). This work develops a feasible, convenient and economic strategy to fabricate effective Pt-free ORR electrocatalysts for relevant energy conversion devices. © 2023 Elsevier Ltd",Biomass-derived carbon; Iron phthalocyanine; Nonprecious metal catalysts; Oxygen reduction reaction; Zn-air battery,Carbon; Electrocatalysts; Electrolytic reduction; Iron; Iron compounds; Open circuit voltage; Oxygen; Proton exchange membrane fuel cells (PEMFC); Zinc; Zinc air batteries; Biomass-derived carbon; Derived carbons; Electrocatalyst for oxygen reduction reactions; Energy conversion devices; Iron phthalocyanines; Low-costs; Non-precious metal catalysts; Nonprecious-metal catalysts; Oxygen reduction reaction; Zinc-air battery; Biomass,Biomass-derived carbon;Iron phthalocyanine;Nonprecious metal catalysts;Oxygen reduction reaction;Zn-air battery;Carbon;Electrocatalysts;Electrolytic reduction;Iron;Iron compounds;Open circuit voltage;Oxygen;Proton exchange membrane fuel cells (PEMFC);Zinc;Zinc air batteries;Derived carbons;Electrocatalyst for oxygen reduction reactions;Energy conversion devices;Iron phthalocyanines;Low-costs;Non-precious metal catalysts;Nonprecious-metal catalysts;Zinc-air battery;Biomass,"L. Zhang; School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China; email: zhanglinwei@mail.lzjtu.cn",,,,,,Elsevier Ltd,22132929,,,,English,J. Environ. Chem. Eng.,Article,Scopus,,2-s2.0-85150341393,,China,mail.lzjtu.cn,,,"Zhang, L.; Jiao, X.; He, G.; Shen, Z.; Wang, W."
"Charreteur, F., Jaouen, F., Dodelet, J.P.",Iron porphyrin-based cathode catalysts for PEM fuel cells: Influence of pyrolysis gas on activity and stability,2009,ELECTROCHIMICA ACTA,54,26,,6622,6630,9,108,10.1016/j.electacta.2009.06.058,,"[Charreteur, Fanny; Jaouen, Frederic; Dodelet, Jean-Pol] INRS Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada",,"Fe-based catalysts for the 02 reduction in acidic medium were prepared by impregnating chloro-iron tetramethoxyphenylporphyrin (Cl-FeTMPP) on a non-microporous carbon black and heat-treating the resulting material at 950 degrees C either in NH3 (Mode 1) or in Ar (Mode 2). The most active catalyst using Mode I has a Fe bulk content of 0.4 wt% and an activity of 17 mA mg(-1) at 0.8 V in fuel cell. This activity is controlled by the microporous surface area of the catalyst. The most active catalysts using Mode 2 has an Fe bulk content of 3.7 wt% and an activity of 1.9 mA mg(-1) at 0.8 V in fuel cell. In Mode 2, the nitrogen and/or the iron surface concentrations control the activity. Concerning stability, Mode 1-catalysts are unstable while Mode 2-catalysts show stability for at least 15 h when at least 66 wt% ClFeTMPP is impregnated onto N330 and heat-treated at 950 degrees C in Ar.The catalyst made with 66 wt% Cl-FeTMPP has a bulk Fe content of 5.2 wt% and an activity of 1.3 mA mg(-1) at 0.8 V in fuel cell. Thus, in the present study, pyrolysis in NH3 gives active but unstable catalysts while pyrolysis in argon gives less active but more stable catalysts at high Cl-FeTMPP loading. Graphitization of Cl-FeTMPP during pyrolysis in argon seems to impart stability. Mode 2-catalysts are stable in spite of a high peroxide yield of 26% while Mode 1-catalysts are unstable in spite of a low 5% peroxide yield. Crown Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved.",Oxygen reduction; Non-precious metal catalysts; Proton exchange membrane fuel cell,OXYGEN REDUCTION REACTION; FE-BASED CATALYSTS; HEAT-TREATMENT AFFECT; CARBON-BLACK; NONNOBLE ELECTROCATALYSTS; ELECTROCHEMICAL CHARACTERISTICS; HYDROGEN-PEROXIDE; FE/N/C CATALYSTS; O-2 REDUCTION; ELECTROLYTE,Oxygen reduction;Non-precious metal catalysts;Proton exchange membrane fuel cell;OXYGEN REDUCTION REACTION;FE-BASED CATALYSTS;HEAT-TREATMENT AFFECT;CARBON-BLACK;NONNOBLE ELECTROCATALYSTS;ELECTROCHEMICAL CHARACTERISTICS;HYDROGEN-PEROXIDE;FE/N/C CATALYSTS;O-2 REDUCTION;ELECTROLYTE,jaouen@emt.inrs.ca; dodelet@emt.inrs.ca,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000270646600071,2-s2.0-69249102152,Canada,emt.inrs.ca,INRS Energie Mat & Telecommun,"INRS Energie Mat & Telecommun, Canada","Charreteur, Fanny; Jaouen, Frederic; Dodelet, Jean-Pol"
"Meng, H., Larouche, N., Lefevre, M., Jaouen, F., Stansfield, B., Dodelet, J.P.",Iron porphyrin-based cathode catalysts for polymer electrolyte membrane fuel cells: Effect of NH3 and Ar mixtures as pyrolysis gases on catalytic activity and stability,2010,ELECTROCHIMICA ACTA,55,22,,6450,6461,12,108,10.1016/j.electacta.2010.06.039,,"[Meng, Hui; Larouche, Nicholas; Lefevre, Michel; Jaouen, Frederic; Stansfield, Barry; Dodelet, Jean-Pol] INRS Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada",,"Ten different catalysts were prepared by loading 66 wt% ClFeTMPP on N330, a furnace grade carbon black, and pyrolyzing this catalyst precursor for 10 min at 950 degrees C in a NH3/Ar gas mixture with various NH3 volume fractions (from 0% to 100%). The activity and stability of these catalysts were measured in a fuel cell and compared. The only stable catalyst, although the least active, among these was the one pyrolyzed in pure Ar. A notable leap in catalytic activity, but drop in stability, was observed for all catalysts pyrolyzed in gas mixtures containing NH3, even with a mere volume fraction of 1.3% NH3 in the pyrolysis gas mixture. Catalytic activities increased, while stability decreased with increasing volume fraction of NH3. The physicochemical properties of these catalysts were correlated with their electrochemical behaviour observed in fuel cell tests. It was found that a volume fraction of only 1.3% NH3 was enough to double the micropore surface area, the surface nitrogen and iron concentrations in the resulting catalyst. Since the active sites are believed to be of the Fe/N/C type, the sharp increase in catalytic activity with as little as 1.3% NH3 is attributed to the concurrent increase in microporous surface area, N and Fe surface contents in these catalysts. The only property that apparently correlates with stability is the degree of graphitization of the catalyst, which was estimated either from either X-ray diffraction and Raman spectroscopy measurements. Lastly, it was found that the catalysts' peroxide yield, resulting from the partial reduction of O-2, does not correlate with their degree of stability. (C) 2010 Elsevier Ltd. All rights reserved.",Oxygen reduction; Non-precious metal catalyst; Proton exchange membrane fuel cell; PEM fuel cell; Pyrolysis; Ammonia,OXYGEN REDUCTION REACTION; FE-BASED CATALYSTS; CONTAINING CARBON CATALYSTS; HYDROGEN-PEROXIDE; RAMAN-SCATTERING; C-N; NITROGEN; ELECTROCATALYSTS; ELECTROREDUCTION; PERFORMANCE,Oxygen reduction;Non-precious metal catalyst;Proton exchange membrane fuel cell;PEM fuel cell;Pyrolysis;Ammonia;OXYGEN REDUCTION REACTION;FE-BASED CATALYSTS;CONTAINING CARBON CATALYSTS;HYDROGEN-PEROXIDE;RAMAN-SCATTERING;C-N;NITROGEN;ELECTROCATALYSTS;ELECTROREDUCTION;PERFORMANCE,dodelet@emt.inrs.ca,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000281501100017,2-s2.0-77955710601,Canada,emt.inrs.ca,INRS Energie Mat & Telecommun,"INRS Energie Mat & Telecommun, Canada","Meng, Hui; Larouche, Nicholas; Lefevre, Michel; Jaouen, Frederic; Stansfield, Barry; Dodelet, Jean-Pol"
"Wang, X., Ferrandon, M., Park, J.H., Shen, J.J., Kropf, A.J., Zhang, H., Zelenay, P., Myers, D.J.",Iron redox behavior and oxygen reduction activity of Fe-N-C electrocatalysts in different electrolytes,2023,Electrochimica Acta,443,,141934,,,,20,10.1016/j.electacta.2023.141934,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85158869408&doi=10.1016%2Fj.electacta.2023.141934&partnerID=40&md5=5f8dcda4f354afb3eb2d6d1071d38a19,"Argonne National Laboratory, Lemont, IL, United States; Harvard University, Cambridge, MA, United States; Los Alamos National Laboratory, Los Alamos, NM, United States","Wang, Xiaoping, Argonne National Laboratory, Lemont, IL, United States; Ferrandon, Magali S., Argonne National Laboratory, Lemont, IL, United States; Park, Jaehyung, Argonne National Laboratory, Lemont, IL, United States; Shen, Jingjing, Harvard University, Cambridge, MA, United States; Kropf, Arthur Jeremy, Argonne National Laboratory, Lemont, IL, United States; Zhang, Hanguang, Los Alamos National Laboratory, Los Alamos, NM, United States; Zelenay, Piotr S., Los Alamos National Laboratory, Los Alamos, NM, United States; Myers, Deborah J., Argonne National Laboratory, Lemont, IL, United States","The iron redox behavior and oxygen reduction reaction (ORR) activity of Fe-N-C ORR electrocatalysts synthesized by a variety of techniques were investigated as a function of the identity of the electrolyte anion (bisulfate/sulfate or perchlorate) at a constant pH. In situ X-ray absorption spectroscopy data support the assignment of the redox peaks in the voltammograms to the Fe3+/Fe2+ redox couple. It was found that for a given Fe-N-C catalyst, there is a correlation between the Fe redox couple peak potential and the ORR activity in perchloric acid electrolyte, but not in sulfuric acid electrolyte. While a higher Fe redox couple potential (≥ 110 mV higher) was observed in perchloric acid electrolyte, a higher ORR activity was obtained in sulfuric acid electrolyte. The higher ORR activity observed in sulfuric acid than perchloric acid was correlated with the higher peak current and larger faradaic charge for the Fe redox couple. A study of the Fe redox behavior using a cavity microelectrode, eliminating the impact of ionomer, showed that the interaction of H<inf>2</inf>SO<inf>4</inf> with Fe-N-C is stronger than that of HClO<inf>4</inf> and that Fe redox in both electrolytes is a reversible surface electrochemical reaction. © 2023",Cavity microelectrode; Fe redox couple; ORR activity; Perchloric acid electrolyte; PGM-free Fe-N-C electrocatalyst; Polymer electrolyte fuel cells; Sulfuric acid electrolyte,Chlorine compounds; Electrolytic reduction; Iron; Oxygen; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Surface reactions; X ray absorption spectroscopy; Acid electrolytes; Cavity microelectrode; Fe redox couple; Oxygen reduction reaction; Oxygen reduction reaction activity; Perchloric acid electrolyte; Perchloric acids; PGM-free fe-N-C electrocatalyst; Polymer electrolyte fuel cells; Reaction activity; Redox couple; Sulfuric acid electrolyte; Electrocatalysts,Cavity microelectrode;Fe redox couple;ORR activity;Perchloric acid electrolyte;PGM-free Fe-N-C electrocatalyst;Polymer electrolyte fuel cells;Sulfuric acid electrolyte;Chlorine compounds;Electrolytic reduction;Iron;Oxygen;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Surface reactions;X ray absorption spectroscopy;Acid electrolytes;Oxygen reduction reaction;Oxygen reduction reaction activity;Perchloric acids;Reaction activity;Redox couple;Electrocatalysts,,,,,,,Elsevier Ltd,00134686,,ELCAA,,English,Electrochim Acta,Article,Scopus,,2-s2.0-85158869408,,United States,No email,,,"Wang, X.; Ferrandon, M.; Park, J.H.; Shen, J.-J.; Kropf, A.J.; Zhang, H.; Zelenay, P.; Myers, D.J."
"Cheng, Y., He, S., Lu, S.F., Veder, J.P., Johannessen, B., Thomsen, L., Saunders, M., Becker, T., De Marco, R., Li, Q.F., Yang, S.Z., Jiang, S.P.",Iron Single Atoms on Graphene as Nonprecious Metal Catalysts for High-Temperature Polymer Electrolyte Membrane Fuel Cells,2019,ADVANCED SCIENCE,6,10,1802066,,,8,209,10.1002/advs.201802066,,"[Cheng, Yi] Cent S Univ, Dept Environm Engn, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China; [He, Shuai; Jiang, San Ping] Curtin Univ, Fuels & Energy Technol Inst, Perth, WA 6102, Australia; [He, Shuai; Jiang, San Ping] Curtin Univ, Western Australia Sch Mines Minerals Energy & Che, Perth, WA 6102, Australia; [Lu, Shanfu] Beihang Univ, Beijing Key Lab Bioinspired Energy Mat & Devices, Sch Space & Environm, Beijing 100191, Peoples R China; [Veder, Jean-Pierre] Curtin Univ, John de Laeter Ctr, Perth, WA 6102, Australia; [Johannessen, Bernt; Thomsen, Lars] Australian Synchrotron, Clayton, Vic 3168, Australia; [Saunders, Martin] Univ Western Australia, CMCA, Perth, WA 6009, Australia; [Saunders, Martin] Univ Western Australia, Sch Mol Sci, Perth, WA 6009, Australia; [Becker, Thomas] Curtin Univ, Sch Mol & Life Sci, Curtin Inst Funct Mol & Interfaces, Perth, WA 6102, Australia; [De Marco, Roland] Univ Sunshine Coast, Fac Sci Hlth Educ & Engn, Maroochydore, Qld 4558, Australia; [De Marco, Roland] Univ Queensland, Sch Chem & Mol Biosci, Brisbane, Qld 4072, Australia; [Li, Qingfeng] Tech Univ Denmark, Dept Energy Convers & Storage, DK-2800 Lyngby, Denmark; [Yang, Shi-ze] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA",,"Iron single atom catalysts (Fe SACS) are the best-known nonprecious metal (NPM) catalysts for the oxygen reduction reaction (ORR) of polymer electrolyte membrane fuel cells (PEMFCs), but their practical application has been constrained by the low Fe SACs loading (<2 wt%). Here, a one-pot pyrolysis method is reported for the synthesis of iron single atoms on graphene (FeSA-G) with a high Fe SAC loading of approximate to 7.7 +/- 1.3 wt%. The as-synthesized FeSA-G shows an onset potential of 0.950 V and a half-wave potential of 0.804 V in acid electrolyte for the ORR, similar to that of Pt/C catalysts but with a much higher stability and higher phosphate anion tolerance. High temperature SiO2 nanopartide-doped phosphoric acid/polybenzimidazole (PA/PBI/SiO2) composite membrane cells utilizing a FeSA-G cathode with Fe SAC loading of 0.3 mg cm(-2) delivers a peak power density of 325 mW cm(-2) at 230 degrees C, better than 313 mW cm(-2) obtained on the cell with a Pt/C cathode at a Pt loading of 1 mg cm(-2). The cell with FeSA-G cathode exhibits superior stability at 230 degrees C, as compared to that with Pt/C cathode. Our results provide a new approach to developing practical NPM catalysts to replace Pt-based catalysts for fuel cells.",high loading; high temperature polymer electrolyte membrane fuel cells; iron single atom catalysts; nonprecious metal catalysts; oxygen reduction reaction,OXYGEN REDUCTION; ORR CATALYST; ELECTROCATALYSTS; PERFORMANCE; SITES; PHOSPHATE; IDENTIFICATION; ADSORPTION; ALKALINE; CARBON,high loading;high temperature polymer electrolyte membrane fuel cells;iron single atom catalysts;nonprecious metal catalysts;oxygen reduction reaction;OXYGEN REDUCTION;ORR CATALYST;ELECTROCATALYSTS;PERFORMANCE;SITES;PHOSPHATE;IDENTIFICATION;ADSORPTION;ALKALINE;CARBON,lusf@buaa.edu.cn; s.jiang@curtin.edu.au,,"111 RIVER ST, HOBOKEN 07030-5774, NJ USA",,,,WILEY,,,,31131190,English,ADV SCI,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science,WOS:000468187200006,2-s2.0-85063001892,China;Australia;Denmark;United States,buaa.edu.cn,Cent S Univ;Curtin Univ;Beihang Univ;Australian Synchrotron;Univ Western Australia;Univ Sunshine Coast;Univ Queensland;Tech Univ Denmark;Oak Ridge Natl Lab,"Cent S Univ, China;Curtin Univ, Australia;Beihang Univ, China;Australian Synchrotron, Australia;Univ Western Australia, Australia;Univ Sunshine Coast, Australia;Univ Queensland, Australia;Tech Univ Denmark, Denmark;Oak Ridge Natl Lab, United States","Cheng, Yi; He, Shuai; Lu, Shanfu; Veder, Jean-Pierre; Johannessen, Bernt; Thomsen, Lars; Saunders, Martin; Becker, Thomas; De Marco, Roland; Li, Qingfeng; Yang, Shi-ze; Jiang, San Ping"
"Zhang, G., Chenitz, R., Lefevre, M., Sun, S., Dodelet, J.P.",Is iron involved in the lack of stability of Fe/N/C electrocatalysts used to reduce oxygen at the cathode of PEM fuel cells?,2016,Nano Energy,29,,,111,125,,274,10.1016/j.nanoen.2016.02.038,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84959550202&doi=10.1016%2Fj.nanoen.2016.02.038&partnerID=40&md5=3f34efe3205d13b8f514e59c6d0161c9,"Matériaux et Télécommunications, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Canetique Electrocatalysis Inc., Varennes, QC, Canada","Zhang, Gaixia, Matériaux et Télécommunications, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Chenitz, Régis, Matériaux et Télécommunications, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Lefèvre, Michel, Canetique Electrocatalysis Inc., Varennes, QC, Canada; Sun, Shuhui, Matériaux et Télécommunications, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Dodelet, Jean Pol, Matériaux et Télécommunications, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada","NC_Ar+NH<inf>3</inf> is a Fe/N/C electrocatalyst developed by our group to reduce oxygen. It is obtained from the pyrolysis in Ar, then in NH<inf>3</inf>, of a mixture of ZIF-8 (a metal-organic-framework) and the complex made between ironII acetate and 1,10 phenantroline. In terms of activity and performance, NC_Ar+NH<inf>3</inf> is becoming a serious contender to Pt, but it is still unstable in a H<inf>2</inf>/O<inf>2</inf> PEM fuel cell. Its current density recorded at 0.6 V and 80 °C decreases, first quickly during about 15 h, then more slowly for several tens of hours. The aim of this work is to verify if iron in the catalyst could be at the origin of the first rapid decay of NC_Ar+NH<inf>3</inf> through a Fenton reaction with some H<inf>2</inf>O<inf>2</inf> generated by an incomplete reduction of O<inf>2</inf> in fuel cell. To do so, the strategy was simple: produce a MOF_Ar+NH<inf>3</inf> catalyst using the same ZIF-8, but without deliberate addition of iron precursor, and compare its stability to that of NC_Ar+NH<inf>3</inf>. However, this has been impossible to achieve since there is a native iron impurity in ZIF-8 leading to an increase of Fe content after each pyrolysis step. In order to circumvent this problem, we produced several MOF_Ar+NH<inf>3</inf> (t) catalysts, varying (t), the pyrolysis time in NH<inf>3</inf> (and therefore also the Fe content). This enabled us to determine, by extrapolation to 50 ppm Fe on a log i vs log Fe content, the initial current density at 0.6 V of a catalyst (MOF_CNx_Ar+NH<inf>3</inf>) for which the current density would essentially be attributable to CNx catalytic sites. From the similarity of the normalized instability curves for MOF_CNx_Ar+NH<inf>3</inf>, all MOF_Ar+NH<inf>3</inf> (t) and NC_Ar+NH<inf>3</inf> catalysts, we are able to conclude that neither iron (through a Fenton reaction) nor H<inf>2</inf>O<inf>2</inf> alone are responsible for the first rapid decay of these Fe/N/C catalysts in fuel cells, but that a slow electro-oxidation of the carbonaceous support of all NC_Ar+NH<inf>3</inf> and MOF_Ar+NH<inf>3</inf>(t) catalysts, occurring in about 15 h in H<inf>2</inf>/O<inf>2</inf> fuel cell, is transforming the initially hydrophobic catalyst layers into hydrophilic ones. It is proposed that this phenomenon, causing micropore flooding, is at the origin of the first quick decay at 0.6 V of all the catalysts studied in this work. The slow electro-oxidation of the carbonaceous support during the durability test at 0.6 V also affects the mass activity of the catalysts. This was demonstrated for NC_Ar+NH<inf>3</inf>. We also determined what would be the initial polarization curve, the initial maximum power of MOF_CNx_Ar+NH<inf>3</inf> (0.150 W cm−2; 22% of that of NC_Ar+NH<inf>3</inf>), the initial mass activity at 0.9 V of MOF_CNx_Ar+NH<inf>3</inf> (0.3 A g−1; 3% of that of NC_Ar+NH<inf>3</inf>) and its initial Tafel slope (56 mV decade−1). The Tafel slope similarity for MOF_CNx_Ar+NH<inf>3</inf> and for NC_Ar+NH<inf>3</inf> (60 mV decade−1) indicates that the ORR kinetics on both types of catalysts, and therefore on CNx and FeNx catalytic sites, is also similar. © 2016 Elsevier Ltd",Carbon electro-oxidation; Durability; Instability; Non-noble catalysts; Non-noble metal; ORR,Carbon; Catalysts; Crystalline materials; Current density; Durability; Electrocatalysts; Electrooxidation; Fuel cells; Iron; Iron compounds; Organometallics; Oxidation; Plasma stability; Precious metals; Proton exchange membrane fuel cells (PEMFC); Pyrolysis; Stability; Carbonaceous supports; Durability test; Fenton reactions; Hydrophobic catalysts; Iron impurities; Iron precursors; Metal organic framework; Polarization curves; Catalyst activity,Carbon electro-oxidation;Durability;Instability;Non-noble catalysts;Non-noble metal;ORR;Carbon;Catalysts;Crystalline materials;Current density;Electrocatalysts;Electrooxidation;Fuel cells;Iron;Iron compounds;Organometallics;Oxidation;Plasma stability;Precious metals;Proton exchange membrane fuel cells (PEMFC);Pyrolysis;Stability;Carbonaceous supports;Durability test;Fenton reactions;Hydrophobic catalysts;Iron impurities;Iron precursors;Metal organic framework;Polarization curves;Catalyst activity,"J.-P. Dodelet; INRS-Énergie, Matériaux et Télécommunications, Québec, 1650 Boulevard Lionel Boulet, Varennes, J3X 1S2, Canada; email: dodelet@emt.inrs.ca",,,,,,Elsevier Ltd,22112855,,,,English,Nano Energy,Article,Scopus,,2-s2.0-84959550202,,Canada,emt.inrs.ca,,,"Zhang, G.; Chenitz, R.; Lefevre, M.; Sun, S.; Dodelet, J.-P."
"Choi, J.Y., Yang, L.J., Kishimoto, T., Fu, X.G., Ye, S.Y., Chen, Z.W., Banham, D.",Is the rapid initial performance loss of Fe/N/C non precious metal catalysts due to micropore flooding?,2017,ENERGY & ENVIRONMENTAL SCIENCE,10,1,,296,305,10,157,10.1039/c6ee03005j,,"[Choi, Ja-Yeon; Fu, Xiaogang; Chen, Zhongwei] Univ Waterloo, Dept Chem Engn, 200 Univ Ave W, Waterloo, ON N2L 3G1, Canada; [Yang, Lijun; Ye, Siyu; Banham, Dustin] Ballard Power Syst, 9000 Glenlyon Pkwy, Burnaby, BC V5J 5J8, Canada; [Kishimoto, Takeaki] Nisshinbo Holdings Inc, Business Dev Dept, Midori Ku, 1-2-3 Onodai, Chiba 2670056, Japan",,"The activity of non-precious metal catalysts (NPMCs) has now reached a stage at which they can be considered as possible alternatives to Pt for some proton exchange membrane fuel cell (PEMFC) applications. However, challenges still remain in achieving acceptable stability (performance during potentiostatic or galvanostatic experiments). The most widely reported hypotheses for the instability of NPMCs include de-metalation, protonation/anion binding, and generation of H2O2. Recently, it has been proposed that the largest contribution to the instability of NPMCs is from flooding of micropores within the catalyst particles leading to significant mass transport limitations. While indirect evidence has been obtained that appears to support this hypothesis, no study has yet been performed to directly target micropore flooding. In this work, a systematic study is performed to investigate micropore flooding in situ before and after stability testing. The results do not support micropore flooding as being a large contributor to instability, at least for the family of NPMCs evaluated in this work. The protocol outlined here can be used by other researchers in the NPMC community to diagnose micropore flooding in their own respective catalysts.",,OXYGEN REDUCTION REACTION; MEMBRANE FUEL-CELLS; FE-BASED CATALYSTS; ACTIVE-SITES; NONPLATINUM CATALYSTS; COMPOSITE CATALYSTS; CARBON NANOTUBES; CATHODE CATALYST; IRON; STABILITY,OXYGEN REDUCTION REACTION;MEMBRANE FUEL-CELLS;FE-BASED CATALYSTS;ACTIVE-SITES;NONPLATINUM CATALYSTS;COMPOSITE CATALYSTS;CARBON NANOTUBES;CATHODE CATALYST;IRON;STABILITY,zhwchen@uwaterloo.ca; dustin.banham@ballard.com,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,1754-5692,,,,English,ENERG ENVIRON SCI,Article,WoS,Chemistry; Energy & Fuels; Engineering; Environmental Sciences & Ecology,WOS:000395208000027,2-s2.0-85009989737,Canada;Japan,uwaterloo.ca,Univ Waterloo;Ballard Power Syst;Nisshinbo Holdings Inc,"Univ Waterloo, Canada;Ballard Power Syst, Canada;Nisshinbo Holdings Inc, Japan","Choi, Ja-Yeon; Yang, Lijun; Kishimoto, Takeaki; Fu, Xiaogang; Ye, Siyu; Chen, Zhongwei; Banham, Dustin"
"Kuttiyiel, K.A., Sasaki, K., Park, G.G., Vukmirovic, M.B., Wu, L.J., Zhu, Y.M., Chen, J.G.G., Adzic, R.R.",Janus structured Pt-FeNC nanoparticles as a catalyst for the oxygen reduction reaction,2017,CHEMICAL COMMUNICATIONS,53,10,,1660,1663,4,55,10.1039/c6cc08709d,,"[Kuttiyiel, Kurian A.; Sasaki, Kotaro; Park, Gu-Gon; Vukmirovic, Miomir B.; Chen, Jingguang G.; Adzic, Radoslav R.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA; [Kuttiyiel, Kurian A.; Chen, Jingguang G.] Columbia Univ, Dept Chem Engn, New York, NY 10027 USA; [Park, Gu-Gon] Korea Inst Energy Res, Fuel Cell Lab, Daejeon 305343, South Korea; [Wu, Lijun; Zhu, Yimei] Brookhaven Natl Lab, Dept Condensed Matter Phys & Mat Sci, Upton, NY 11973 USA",,"We present a new Janus structured catalyst consisting of Pt nano-particles on Fe-N-C nanoparticles encapsulated by graphene layers for the ORR. The ORR activity of the catalyst increases under potential cycling as the unique Janus nanostructure is further bonded due to a synergetic effect. The present study describes an important advanced approach for the future design of efficient, stable, and low-cost Pt-based electrocatalytic systems.",,PEM FUEL-CELLS; ELECTROCATALYTIC PROPERTIES; IRON; IDENTIFICATION; NANOCRYSTALS; PERFORMANCE; PARAMETERS; STABILITY; SURFACES; DENSITY,PEM FUEL-CELLS;ELECTROCATALYTIC PROPERTIES;IRON;IDENTIFICATION;NANOCRYSTALS;PERFORMANCE;PARAMETERS;STABILITY;SURFACES;DENSITY,adzic@bnl.gov,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,1359-7345,,,28098274,English,CHEM COMMUN,Article,WoS,Chemistry,WOS:000395441400022,,United States;South Korea,bnl.gov,Brookhaven Natl Lab;Columbia Univ;Korea Inst Energy Res,"Brookhaven Natl Lab, United States;Columbia Univ, United States;Korea Inst Energy Res, South Korea","Kuttiyiel, Kurian A.; Sasaki, Kotaro; Park, Gu-Gon; Vukmirovic, Miomir B.; Wu, Lijun; Zhu, Yimei; Chen, Jingguang G.; Adzic, Radoslav R."
"Yang, J., Shi, W., Xu, Q., Yin, X., Zelenay, P.",Kinetic Analysis of Carbon Corrosion-Induced Degradation of Platinum Group Metal-Free Catalysts in Acidic Media,2023,ACS Catalysis,13,22,,14953,14964,,21,10.1021/acscatal.3c03387,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85178365006&doi=10.1021%2Facscatal.3c03387&partnerID=40&md5=21319b6f85d5024285f84bb8a1bb8318,"State Key Laboratory of Coal Conversion, Institute of Coal Chemistry Chinese Academy of Sciences, Taiyuan, Shanxi, China; School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, China; Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States","Yang, Jie, State Key Laboratory of Coal Conversion, Institute of Coal Chemistry Chinese Academy of Sciences, Taiyuan, Shanxi, China, School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, China; Shi, Wenwen, State Key Laboratory of Coal Conversion, Institute of Coal Chemistry Chinese Academy of Sciences, Taiyuan, Shanxi, China; Xu, Qinchao, State Key Laboratory of Coal Conversion, Institute of Coal Chemistry Chinese Academy of Sciences, Taiyuan, Shanxi, China; Yin, Xi, State Key Laboratory of Coal Conversion, Institute of Coal Chemistry Chinese Academy of Sciences, Taiyuan, Shanxi, China, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Zelenay, Piotr S., Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States","Low-cost and high-activity platinum group metal-free (PGM-free) oxygen reduction reaction (ORR) catalysts are promising for use in polymer electrolyte fuel cells (PEFCs). However, their durability remains a challenge. Herein, we investigate the degradation mechanisms of iron- and nitrogen-doped carbon (Fe-N-C) catalysts and nitrogen-doped carbon (N-C) at 1.0 V vs. RHE, mimicking the open-cell cathode potential in PEFCs. The catalyst oxidation current decreases over time and follows a power-law decay model, indicating competition between surface passivation and carbon corrosion. The ORR activity decays and follows an exponential model with an offset, indicating the coexistence of stable and unstable active sites. Further, we propose that the Fe-N<inf>x</inf> edge sites are more susceptible to high potential corrosion than the in-plane sites. These findings point to the susceptibility of carbon matrix in PGM-free catalysts to electrochemical corrosion, revealing likely mechanisms of the ORR activity loss, crucial for developing durable PGM-free catalysts. © 2023 American Chemical Society.",carbon corrosion; electrochemical oxidation; Fe−N−C catalysts; ORR; oxygen reduction reaction,Carbon; Catalyst activity; Degradation; Doping (additives); Iron compounds; Nitrogen; Oxygen; Passivation; Platinum; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Reaction kinetics; Solid electrolytes; Carbon corrosion; Fe−N−C catalyst; Metal-free catalysts; Nitrogen-doped carbons; Oxygen reduction reaction; Platinum group metals; Polymer electrolyte fuel cells; Reaction activity; ]+ catalyst; Electrolytic reduction,carbon corrosion;electrochemical oxidation;Fe−N−C catalysts;ORR;oxygen reduction reaction;Carbon;Catalyst activity;Degradation;Doping (additives);Iron compounds;Nitrogen;Oxygen;Passivation;Platinum;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Reaction kinetics;Solid electrolytes;Fe−N−C catalyst;Metal-free catalysts;Nitrogen-doped carbons;Platinum group metals;Polymer electrolyte fuel cells;Reaction activity;]+ catalyst;Electrolytic reduction,"X. Yin; State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi, 030001, China; email: xiyin@sxicc.ac.cn; P. Zelenay; Los Alamos National Laboratory, Materials Physics and Applications Division, Los Alamos, 87545, United States; email: zelenay@lanl.gov",,,,,,American Chemical Society,21555435,,ACCAC,,English,ACS Catal.,Article,Scopus,,2-s2.0-85178365006,,China;United States,sxicc.ac.cn,,,"Yang, J.; Shi, W.; Xu, Q.; Yin, X.; Zelenay, P."
"Wu, Y., Muthukrishnan, A., Nagata, S., Nabae, Y.",Kinetic Analysis of Electrochemical Oxygen Reduction over a Fe/N/C Catalyst Considering the Chemical Decomposition of H2O2,2020,Journal of Physical Chemistry C,124,32,,17599,17606,,5,10.1021/acs.jpcc.0c03749,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091870923&doi=10.1021%2Facs.jpcc.0c03749&partnerID=40&md5=cffb7bf48b2c47f270522872b636db47,"Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram, KL, India","Wu, Yun, Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; Muthukrishnan, Azhagumuthu, Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan, School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram, KL, India; Nagata, Shinsuke, Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; Nabae, Yuta, Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan","Iron and nitrogen codoped carbon catalysts (Fe/N/C catalysts) are promising nonprecious-metal catalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells. Understanding the ORR kinetics over Fe/N/C catalysts is crucial for active catalyst development. Here, we propose an analytical method for rotating ring-disk electrode (RRDE) voltammetry to separate the ORR for O2 reduction to H2O via the 4-e pathway (k1), O2 reduction to H2O2 via the 2-e pathway (k2), H2O2 reduction to H2O via the 2-e pathway (k3), H2O2 chemical decomposition to O2 and H2O (k4), and H2O2 oxidation to O2 by the 2-e pathway (k-2). First, RRDE voltammetry in an H2O2 solution was performed, yielding k3, k4, and k-2. The obtained parameters were used to analyze the ORR voltammogram to calculate I1′, I2′, I3′, I4′, k1′, and k2′. These currents and kinetic constants were corrected by studying the effect of the catalyst loading density to obtain I10, I20, I30, I40, k10, and k20, thus avoiding the overestimation of I10 and k10 caused by the quasi-four-electron reduction of O2. The contribution of k4 during the ORR is negligible at considerable anodic and cathodic overpotentials but was detected at 0.8 V, for which k3 and k-2 are relatively small. © 2020 American Chemical Society.",,Catalysts; Chemical analysis; Decomposition; Electrolytic reduction; Kinetics; Oxygen; Proton exchange membrane fuel cells (PEMFC); Rate constants; Voltammetry; Analytical method; Catalyst loadings; Cathodic overpotentials; Chemical decomposition; Electrochemical oxygen reduction; Four-electron reduction; Non-precious metal catalysts; Rotating ring-disk electrode; Oxygen reduction reaction,Catalysts;Chemical analysis;Decomposition;Electrolytic reduction;Kinetics;Oxygen;Proton exchange membrane fuel cells (PEMFC);Rate constants;Voltammetry;Analytical method;Catalyst loadings;Cathodic overpotentials;Chemical decomposition;Electrochemical oxygen reduction;Four-electron reduction;Non-precious metal catalysts;Rotating ring-disk electrode;Oxygen reduction reaction,"Y. Nabae; Department of Materials Science and Engineering, Tokyo Institute of Technology, Meguro-ku, Tokyo, 2-12-1 S8-26, Ookayama, 152-8522, Japan; email: nabae.y.aa@m.titech.ac.jp",,,,,,American Chemical Society service@acs.org,19327447,,,,English,J. Phys. Chem. C,Article,Scopus,,2-s2.0-85091870923,,Japan;India,m.titech.ac.jp,,,"Wu, Y.; Muthukrishnan, A.; Nagata, S.; Nabae, Y."
"Chen, Y., Asset, T., Lee, R., Artyushkova, K., Atanassov, P.",Kinetic Isotopic Effect Studies of Iron-Nitrogen-Carbon Electrocatalysts for Oxygen Reduction Reaction,2019,Journal of Physical Chemistry C,123,18,,11476,11483,,17,10.1021/acs.jpcc.9b01480,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85065674551&doi=10.1021%2Facs.jpcc.9b01480&partnerID=40&md5=483e13b3963777b4c5054f02b7457f5b,"University of California, Irvine, Irvine, CA, United States; University of New Mexico School of Engineering, Albuquerque, NM, United States","Chen, Yechuan, University of California, Irvine, Irvine, CA, United States; Asset, Tristan, University of California, Irvine, Irvine, CA, United States; Lee, Rose Y., University of New Mexico School of Engineering, Albuquerque, NM, United States; Artyushkova, Kateryna, University of New Mexico School of Engineering, Albuquerque, NM, United States; Atanassov, Plamen B., University of California, Irvine, Irvine, CA, United States, University of New Mexico School of Engineering, Albuquerque, NM, United States","The kinetic isotopic effect (KIE) of oxygen reduction reaction (ORR) was studied via the investigation of both Koutecky-Levich and Tafel methods on atomically dispersed iron-containing, a.k.a. iron-nitrogen-carbon (Fe-N-C) electrocatalyst. This type of catalyst has been under intensive development for use as a platinum-group-metal-free cathode catalyst in polymer electrolyte membrane fuel cells. The KIE value derived from the Tafel method (the slopes of the semilogarithmic representation of the polarization data) is effectively 1, indicating that for this Fe-N-C electrocatalyst, the rate-determining step (RDS), i.e., first electron charge transfer, is independent of the proton/deuteron ratio (H+/D+). This finding suggests that the RDS of the Fe-N-C catalysts is not the main factor limiting its performance. Thus, through careful optimization of structure and morphology resulting in overcoming other limitations, Fe-N-C catalysts could, in principle, successfully compete with Pt-based ORR electrocatalysts. In contrast, the KIE value derived from the Koutecky-Levich method, based on the analysis of linear sweep voltammetry in the diffusion-limited region of polarization response at varied convective conditions (electrode rotating speeds), is approximately 2, thus implying that in mass-transport-controlled region of ORR, the mechanism and, hence, the RDS are H+-dependent. This behavior, combined with the understanding that Fe-N-C display multiple active sites, suggests a more complex and more limited mechanism of ORR for the sites involved in hydrogen peroxide production and further reduction, a.k.a. ""parallel"" or peroxide pathway. The catalysts exhibiting this hydrogen peroxide production (bifunctional or 2 × 2 e-) pathway will be intermittently inferior in ORR due to the concerted proton/electron charge-transfer process as RDS. © 2019 American Chemical Society.",,Carbon; Charge transfer; Chemical plants; Electrocatalysts; Electrodes; Electrolytic reduction; Fuel cells; Hydrogen peroxide; Hydrogen production; Iron; Isotopes; Nitrogen; Oxidation; Oxygen; Peroxides; Polarization; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Structural optimization; Charge transfer process; Electron charge transfer; Hydrogen peroxide production; Kinetic isotopic effects; Linear sweep voltammetry; Oxygen reduction reaction; Rate-determining step; Structure and morphology; Iron compounds,Carbon;Charge transfer;Chemical plants;Electrocatalysts;Electrodes;Electrolytic reduction;Fuel cells;Hydrogen peroxide;Hydrogen production;Iron;Isotopes;Nitrogen;Oxidation;Oxygen;Peroxides;Polarization;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Structural optimization;Charge transfer process;Electron charge transfer;Hydrogen peroxide production;Kinetic isotopic effects;Linear sweep voltammetry;Oxygen reduction reaction;Rate-determining step;Structure and morphology;Iron compounds,"P. Atanassov; Department of Chemical and Biomolecular Engineering, Fuel Cells Research Center (NFCRC), University of California Irvine, Irvine, 92697, United States; email: plamen.atanassov@uci.edu",,,,,,American Chemical Society service@acs.org,19327447,,,,English,J. Phys. Chem. C,Article,Scopus,,2-s2.0-85065674551,,United States,uci.edu,,,"Chen, Y.; Asset, T.; Lee, R.; Artyushkova, K.; Atanassov, P."
"Li, W., Wan, X., Guo, X., Liu, Q., Wang, Y., Liu, X., Yu, R., Shui, J.",Large 3D network of concave Fe-N-C nanoparticles by nano-welding for high-power fuel cells,2025,Science China Chemistry,68,5,,2081,2087,,5,10.1007/s11426-024-2397-6,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85209396183&doi=10.1007%2Fs11426-024-2397-6&partnerID=40&md5=6a9054598cb8603fad94cd6422657e5d,"Beihang University, Beijing, China; Tianmushan Laboratory, Hangzhou, China; School of Space and Earth Sciences, Beihang University, Beijing, China","Li, Wenwen, Beihang University, Beijing, China, Tianmushan Laboratory, Hangzhou, China; Wan, Xin, Beihang University, Beijing, China, School of Space and Earth Sciences, Beihang University, Beijing, China; Guo, Xu, Beihang University, Beijing, China; Liu, Qingtao, Beihang University, Beijing, China; Wang, Yinuo, Beihang University, Beijing, China; Liu, Xiaofang, Beihang University, Beijing, China; Yu, Ronghai, Beihang University, Beijing, China; Shui, Jianglan, Beihang University, Beijing, China, Tianmushan Laboratory, Hangzhou, China","The network morphology is considered superior to nanoparticles for electrocatalysts to achieve high performance in high-flux energy devices. However, the preparation of network-type electrocatalysts and their electrodes is relatively complex and low in productivity. Here, we report a nano-welding method to transform ZIF-8 nanoparticles into a large Fe-N-C 3D network using Fe/Zn-hexamethylenetetramine (FeZnHMT) as a reactive multifunctional solder. During the carbonization, FeZnHMT welds the ZIF-8 nanoparticles into a network and reacts with them to form concave surfaces loaded with dense Fe-N<inf>4</inf> active sites. The resulting Fe-N-C network has a size of tens of microns and is rich in submicron voids, making it easy to handle during electrode preparation. As characterized by an advanced microwave technique, the Fe-N-C network largely reduces the electrical contact resistance and promotes gas/water transports in the catalyst layer, thus achieving an extremely high power density of 1.355 W cm−2 in a H<inf>2</inf>-O<inf>2</inf> proton exchange membrane fuel cell. The nano-welding method does not require special equipment and presents an easy, low-cost, and scalable method for producing network-structured single-atom catalysts. © Science China Press 2024.",microwave detection; nano-welding; network catalysts; oxygen reduction reaction; single-atom catalysts,Bioreactors; Metal nanoparticles; Microwave sensors; Oxygen reduction reaction; Welding electrodes; Zinc alloys; 3D networks; Microwave detection; Nanowelding; Network catalyst; Single-atom catalyst; Single-atoms; Welding method; ]+ catalyst; Electrolytic reduction,microwave detection;nano-welding;network catalysts;oxygen reduction reaction;single-atom catalysts;Bioreactors;Metal nanoparticles;Microwave sensors;Welding electrodes;Zinc alloys;3D networks;Nanowelding;Network catalyst;Single-atom catalyst;Single-atoms;Welding method;]+ catalyst;Electrolytic reduction,"X. Wan; School of Materials Science and Engineering, Beihang University, Beijing, 100191, China; email: wanxin@buaa.edu.cn; X. Liu; School of Materials Science and Engineering, Beihang University, Beijing, 100191, China; email: liuxf05@buaa.edu.cn; J. Shui; School of Materials Science and Engineering, Beihang University, Beijing, 100191, China; email: shuijianglan@buaa.edu.cn",,,,,,Science China Press,16747291,,SCCCC,,English,Sci. China Chem.,Article,Scopus,,2-s2.0-85209396183,,China,buaa.edu.cn,,,"Li, W.; Wan, X.; Guo, X.; Liu, Q.; Wang, Y.; Liu, X.; Yu, R.; Shui, J."
"Madrid, A., Tolosana-Moranchel, A., Garcia, A., Rojas, S., Bartolome, F., Pakrieva, E., Simonelli, L., Martinez, G., Hueso, J.L., Santamaria, J.",Laser driven generation of single atom Fe-N-C catalysts for the oxygen reduction reaction,2024,CHEMICAL ENGINEERING JOURNAL,498,,155363,,,11,6,10.1016/j.cej.2024.155363,,"[Madrid, Ainhoa; Pakrieva, Ekaterina; Martinez, Gema; Hueso, Jose L.; Santamaria, Jesus] Univ Zaragoza, Inst Nanociencia & Mat Aragon INMA, CSIC, Campus Rio Ebro Edificio ID,C Poeta Mariano Esquil, Zaragoza 50018, Spain; [Madrid, Ainhoa; Pakrieva, Ekaterina; Martinez, Gema; Hueso, Jose L.; Santamaria, Jesus] Univ Zaragoza, Dept Chem & Environm Engn, Campus Rio Ebro,C-Maria Luna 3, Zaragoza 50018, Spain; [Madrid, Ainhoa; Pakrieva, Ekaterina; Martinez, Gema; Hueso, Jose L.; Santamaria, Jesus] Networking Res Ctr Bioengn Biomat & Nanomed CIBER, Madrid 28029, Spain; [Tolosana-Moranchel, Alvaro; Garcia, Alvaro; Rojas, Sergio] Inst Catalisis & Petroleoquim, CSIC, Grp Energia & Quim Sostenibles, Marie Curie 2, Madrid 28049, Spain; [Bartolome, Fernando] Univ Zaragoza, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain; [Simonelli, Laura] CELLS ALBA Synchrotron, E-08290 Barcelona, Spain; [Martinez, Gema] Ctr Univ Def CUD, Zaragoza 50090, Spain; [Hueso, Jose L.] Univ Zaragoza, Escuela Politecn Super, Crta Cuarte S-N, E-22071 Huesca, Spain; [Hueso, Jose L.; Santamaria, Jesus] Inst Invest Sanitaria IIS Aragon, Ave San Juan Bosco 13, Zaragoza 50009, Spain",,"Single-Atom Catalysts (SACs) have emerged as the ultimate solutions in challenging systems bridging the gap between homogeneous and heterogeneous catalysts. However, feasible synthesis methods are necessary to stabilize single metal atoms, increase catalyst loadings and scale up the synthesis. Due to its sluggish kinetics, the oxygen reduction reaction (ORR) is the main source of irreversibility in proton exchange membrane fuel cells (PEMFC). The most promising candidates to replace Pt-based catalysts for the ORR in fuel cells are the so-called Fe-N/C catalysts. These catalysts display high ORR activity in acidic and alkaline electrolytes. In this work, we propose a laser-driven pyrolysis approach to generate Fe-N/C SACs that involves decomposition of aerosolized iron-phthalocyanines. The resulting catalyst displays ORR activity in acidic and alkaline electrolytes, with competitive half-potential and kinetic current density values in comparison with state-of-the-art electrocatalysts.",Laser pyrolysis; Single Atom Catalysts; ORR; Fe-N; Phthalocyanines; Carbon,METAL-ORGANIC FRAMEWORKS; DOPED GRAPHENE SHEETS; CARBON; NITROGEN; IRON; ELECTROCATALYSTS; OXIDATION; H2O2; CONVERSION; GRAPHITE,Laser pyrolysis;Single Atom Catalysts;ORR;Fe-N;Phthalocyanines;Carbon;METAL-ORGANIC FRAMEWORKS;DOPED GRAPHENE SHEETS;NITROGEN;IRON;ELECTROCATALYSTS;OXIDATION;H2O2;CONVERSION;GRAPHITE,srojas@icp.csic.es; gemamar@unizar.es; jlhueso@unizar.es; jesus.santamaria@unizar.es,,"PO BOX 564, 1001 LAUSANNE, SWITZERLAND",,,,ELSEVIER SCIENCE SA,1385-8947,,,,English,CHEM ENG J,Article,WoS,Engineering,WOS:001309644900001,2-s2.0-85203023033,Spain,icp.csic.es,Univ Zaragoza;Networking Res Ctr Bioengn Biomat & Nanomed CIBER;Inst Catalisis & Petroleoquim;CELLS ALBA Synchrotron;Ctr Univ Def CUD;Inst Invest Sanitaria IIS Aragon,"Univ Zaragoza, Spain;Networking Res Ctr Bioengn Biomat & Nanomed CIBER, Spain;Inst Catalisis & Petroleoquim, Spain;CELLS ALBA Synchrotron, Spain;Ctr Univ Def CUD, Spain;Inst Invest Sanitaria IIS Aragon, Spain","Madrid, Ainhoa; Tolosana-Moranchel, Alvaro; Garcia, Alvaro; Rojas, Sergio; Bartolome, Fernando; Pakrieva, Ekaterina; Simonelli, Laura; Martinez, Gema; Hueso, Jose L.; Santamaria, Jesus"
"Niu, Z.Q., Qiao, Z.L., Wang, S.T., Qiao, K.W., Ding, X., Dong, X.B., Zheng, L.R., Cao, D.P.",Lateral synergy of SbN4 and FeN4OH dual sites for boosting oxygen reduction in PEMFC and ultralow temperature Zn-air battery,2023,CHEMICAL ENGINEERING JOURNAL,474,,146004,,,9,13,10.1016/j.cej.2023.146004,,"[Niu, Ziqiang; Qiao, Zelong; Wang, Shitao; Qiao, Kangwei; Ding, Xin; Dong, Xiaobin; Cao, Dapeng] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China; [Zheng, Lirong] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China",,"Dual atom catalysts (DAC) have attracted extensive concerns due to the combinatorial diversity of two central sites and their synergistic effects for boosting oxygen reduction reaction (ORR). However, how the synergistic effect modulates the local electronic structure and thus enhances the ORR activity is still ambiguity. Here, we successfully synthesize FeSb-NC diatomic catalysts with a new local structure of FeN4OH-SbN4, which is identified by synchrotron X-ray adsorption fine spectroscopy. The FeSb-NC shows excellent ORR activity with halfwave potentials of 0.795 V in 0.1 M HClO4 and 0.905 V in 0.1 M KOH. Importantly, the FeSb-NC-based proton exchange membrane fuel cell exhibits a peak power density (PPD) of 0.4 W cm-2 at 1 bar H2/air condition, and the current density at 0.6 ViR-free reaches 0.673 A cm-2. Furthermore, the FeSb-NC-based solid-state Zn-air battery exhibits an ultrahigh PPD of 57.5 mW cm-2 at -40 degrees C ultralow temperature, apparently superior to Fe-NC and Pt/C - based ones. DFT calculations further reveal the synergistic catalytic mechanism of SbN4 and FeN4OH species, i.e. SbN4 could act as a lateral coordination site to enhance reaction kinetics and adsorption ability of FeN4OH species, and thus significantly boosts ORR performance. This work provides a new route of lateral coordination for the design of diatomic catalysts.",Dual atom catalysts; Oxygen reduction reaction; Proton exchange membrane fuel cells; Ultralow temperature Zn -air battery; Synergistic catalytic mechanism,SINGLE-ATOM CATALYSTS; ELECTROCATALYSTS; COORDINATION,Dual atom catalysts;Oxygen reduction reaction;Proton exchange membrane fuel cells;Ultralow temperature Zn -air battery;Synergistic catalytic mechanism;SINGLE-ATOM CATALYSTS;ELECTROCATALYSTS;COORDINATION,stwang@buct.edu.cn; zhenglr@ihep.ac.cn; caodp@mail.buct.edu.cn,,"PO BOX 564, 1001 LAUSANNE, SWITZERLAND",,,,ELSEVIER SCIENCE SA,1385-8947,,,,English,CHEM ENG J,Article,WoS,Engineering,WOS:001149320700001,,China,buct.edu.cn,Beijing Univ Chem Technol;Chinese Acad Sci,"Beijing Univ Chem Technol, China;Chinese Acad Sci, China","Niu, Ziqiang; Qiao, Zelong; Wang, Shitao; Qiao, Kangwei; Ding, Xin; Dong, Xiaobin; Zheng, Lirong; Cao, Dapeng"
"Chen, L., Wu, G., Holby, E.F., Zelenay, P., Tao, W.Q., Kang, Q.J.",Lattice Boltzmann Pore-Scale Investigation of Coupled Physical-electrochemical Processes in C/Pt and Non-Precious Metal Cathode Catalyst Layers in Proton Exchange Membrane Fuel Cells,2015,ELECTROCHIMICA ACTA,158,,,175,186,12,141,10.1016/j.electacta.2015.01.121,,"[Chen, Li; Tao, Wen-Quan] Xi An Jiao Tong Univ, Sch Energy & Power Engn, Key Lab Thermo Fluid Sci & Engn MOE, Xian 710049, Shaanxi, Peoples R China; [Chen, Li; Kang, Qinjun] Los Alamos Natl Lab, Earth & Environm Sci Div, Los Alamos, NM USA; [Wu, Gang; Zelenay, Piotr] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM USA; [Holby, Edward F.] Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM USA",,"High-resolution porous structures of catalyst layers (CLs) including non-precious metal catalysts (NPMCs) or Pt for proton exchange membrane fuel cells are reconstructed using the quartet structure generation set. The nanoscale structures are analyzed in terms of pore size distribution, specific surface area, and phase connectivity. Pore-scale simulation methods based on the lattice Boltzmann method are developed to predict the macroscopic transport properties in CLs. The non-uniform distribution of ionomer in CL generates more tortuous pathways for reactant transport, greatly reducing the effective diffusivity. The tortuosity of CLs is much higher than that adopted by the Bruggeman equation. Knudsen diffusion plays a significant role in oxygen diffusion and significantly reduces the effective diffusivity. Reactive transport inside the CLs is also investigated. Although the reactive surface area of the non-precious metal catalyst (NPMC) CL is much higher than that of the Pt CL, the oxygen reaction rate is lower in the NPMC CL due to the much lower reaction rate coefficient. Although pores of a few nanometers in size can increase the number of reactive sites in NPMC CLs, they contribute little to enhance the mass transport. Mesopores, which are a few tens of nanometers or larger in size, are shown to be required in order to increase the mass transport rate. (C) 2015 Elsevier Ltd. All rights reserved.",Proton exchange membrane fuel cell; catalyst layer; non-precious metal catalyst; reactive transport; effective transport properties; Lattice Boltzmann method,DIRECT NUMERICAL-SIMULATION; EFFECTIVE TRANSPORT-PROPERTIES; OXYGEN-REDUCTION REACTION; GAS-DIFFUSION; MICROSTRUCTURE RECONSTRUCTION; FINITE-VOLUME; MODEL; CARBON; PERFORMANCE; IRON,Proton exchange membrane fuel cell;catalyst layer;non-precious metal catalyst;reactive transport;effective transport properties;Lattice Boltzmann method;DIRECT NUMERICAL-SIMULATION;EFFECTIVE TRANSPORT-PROPERTIES;OXYGEN-REDUCTION REACTION;GAS-DIFFUSION;MICROSTRUCTURE RECONSTRUCTION;FINITE-VOLUME;MODEL;CARBON;PERFORMANCE;IRON,,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000350446000023,,China;United States,No email,Xi An Jiao Tong Univ;Los Alamos Natl Lab,"Xi An Jiao Tong Univ, China;Los Alamos Natl Lab, United States","Chen, Li; Wu, Gang; Holby, Edward F.; Zelenay, Piotr; Tao, Wen-Quan; Kang, Qinjun"
"Muhyuddin, M., Friedman, A., Poli, F., Petri, E., Honig, H., Basile, F., Fasolini, A., Lorenzi, R., Berretti, E., Bellini, M., Lavacchi, A., Elbaz, L., Santoro, C., Soavi, F.",Lignin-derived bimetallic platinum group metal-free oxygen reduction reaction electrocatalysts for acid and alkaline fuel cells,2023,Journal of Power Sources,556,,232416,,,,44,10.1016/j.jpowsour.2022.232416,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85142757508&doi=10.1016%2Fj.jpowsour.2022.232416&partnerID=40&md5=32c565f27b2480923068643aa00012d4,"Department of Materials Science, Università degli Studi di Milano-Bicocca, Milan, MI, Italy; Bar-Ilan University, Ramat Gan, Tel Aviv District, Israel; Department of Chemistry “Giacomo Ciamician”, Alma Mater Studiorum Università di Bologna, Bologna, BO, Italy; Center for Chemical Catalysis - C3, Alma Mater Studiorum Università di Bologna, Bologna, BO, Italy; Istituto Di Chimica Dei Composti Organometallici, Sesto Fiorentino, Florence, FI, Italy","Muhyuddin, Mohsin, Department of Materials Science, Università degli Studi di Milano-Bicocca, Milan, MI, Italy; Friedman, Ariel, Bar-Ilan University, Ramat Gan, Tel Aviv District, Israel; Poli, Federico, Department of Chemistry “Giacomo Ciamician”, Alma Mater Studiorum Università di Bologna, Bologna, BO, Italy; Petri, Elisabetta, Department of Chemistry “Giacomo Ciamician”, Alma Mater Studiorum Università di Bologna, Bologna, BO, Italy; Honig, Hilah Clara, Bar-Ilan University, Ramat Gan, Tel Aviv District, Israel; Basile, Francesco Luca, Center for Chemical Catalysis - C3, Alma Mater Studiorum Università di Bologna, Bologna, BO, Italy; Fasolini, Andrea, Center for Chemical Catalysis - C3, Alma Mater Studiorum Università di Bologna, Bologna, BO, Italy; Lorenzi, Roberto, Department of Materials Science, Università degli Studi di Milano-Bicocca, Milan, MI, Italy; Berretti, E., Istituto Di Chimica Dei Composti Organometallici, Sesto Fiorentino, Florence, FI, Italy; Bellini, M., Istituto Di Chimica Dei Composti Organometallici, Sesto Fiorentino, Florence, FI, Italy; Lavacchi, Alessandro, Istituto Di Chimica Dei Composti Organometallici, Sesto Fiorentino, Florence, FI, Italy; Elbaz, Lior, Bar-Ilan University, Ramat Gan, Tel Aviv District, Israel; Santoro, Carlo, Department of Materials Science, Università degli Studi di Milano-Bicocca, Milan, MI, Italy; Soavi, Francesca, Department of Chemistry “Giacomo Ciamician”, Alma Mater Studiorum Università di Bologna, Bologna, BO, Italy","Metal-nitrogen-carbons (M-N-Cs) as a reliable substitution for platinum-group-metals (PGMs) for oxygen reduction reaction (ORR) are emerging candidates to rationalize the technology of fuel cells. The development of M-N-Cs can further be economized by consuming waste biomass as an inexpensive carbon source for the electrocatalyst support. Herein, we report the simple fabrication and in-depth characterization of electrocatalysts using lignin-derived activated char. The activated char (LAC) was functionalized with metal phthalocyanine (FePc and MnPc) via atmosphere-controlled pyrolysis to produce monometallic M-N-Cs (L_Mn and L_Fe) and bimetallic M1-M2-N-Cs (L_FeMn) electrocatalysts. Raman spectroscopy and transmission electron microscopy (TEM) revealed a defect-rich architecture. XPS confirmed the coexistence of various nitrogen-containing active moieties. L_Fe and L_FeMn demonstrated appreciable ORR in both acidic and alkaline conditions whereas L_FeMn helped in restricting the peroxide yield, particularly in alkaline media. L_Fe and L_FeMn demonstrated remarkable onset potential (E<inf>onset</inf>) of ∼0.942 V (vs RHE) with an E<inf>1/2</inf> of 0.874 V (vs RHE) in 0.1 M KOH. In acid, L_FeMn had an E<inf>onset</inf> of 0.817 V (vs RHE) and an E<inf>1/2</inf> of ∼0.76 V (vs RHE). Finally, the L_FeMn as a cathode electrocatalyst was integrated and tested in PEMFC and AEMFC. AEMFC demonstrated optimistic performance with a peak power density of 261 mW cm−2 at the current density of ∼577 mA cm−2. © 2022 Elsevier B.V.",Anion exchange membrane fuel cell; Lignin-derived char; Oxygen reduction reaction; Platinum group metal-free; Proton exchange membrane fuel cell,Alkaline fuel cells; Alkalinity; Electrolysis; Electrolytic reduction; High resolution transmission electron microscopy; Ion exchange membranes; Lignin; Nitrogen; Oxygen; Platinum; Potassium hydroxide; Proton exchange membrane fuel cells (PEMFC); Anion-exchange membrane fuel cells; Bimetallics; Free oxygen; Lignin-derived char; Metal free; Nitrogen-carbon; Oxygen reduction reaction; Platinum group metal-free; Platinum group metals; Proton-exchange membranes fuel cells; Electrocatalysts,Anion exchange membrane fuel cell;Lignin-derived char;Oxygen reduction reaction;Platinum group metal-free;Proton exchange membrane fuel cell;Alkaline fuel cells;Alkalinity;Electrolysis;Electrolytic reduction;High resolution transmission electron microscopy;Ion exchange membranes;Lignin;Nitrogen;Oxygen;Platinum;Potassium hydroxide;Proton exchange membrane fuel cells (PEMFC);Anion-exchange membrane fuel cells;Bimetallics;Free oxygen;Metal free;Nitrogen-carbon;Platinum group metals;Proton-exchange membranes fuel cells;Electrocatalysts,"C. Santoro; Department of Materials Science, University of Milano-Bicocca, Milan, Via Roberto Cozzi 55, Building U5, 20125, Italy; email: carlo.santoro@unimib.it; F. Soavi; Department of Chemistry “Giacomo Ciamician”, CIRI - FRAME, C3 Center for Chemical Catalysis, Alma Mater Studiorum - Università di Bologna, Italy; email: francesca.soavi@unibo.it",,,,,,Elsevier B.V.,03787753,0444894810,JPSOD,,English,J Power Sources,Article,Scopus,,2-s2.0-85142757508,,Italy;Israel,unimib.it,,,"Muhyuddin, M.; Friedman, A.; Poli, F.; Petri, E.; Honig, H.; Basile, F.; Fasolini, A.; Lorenzi, R.; Berretti, E.; Bellini, M.; Lavacchi, A.; Elbaz, L.; Santoro, C.; Soavi, F."
"Li, L., Xu, M., Wang, Y.M., Zhang, Y.A., Li, Y.Y., Li, F.Y., Zeng, L., Zhang, X.Y., Zheng, J.X., Zheng, Z.P.",Linking Enhanced Kinetics of Electrocatalytic Oxygen Reduction Reaction with Increased Utilization of Active Sites in a Hierarchical Single-Atom Catalyst,2023,SMALL,19,1,,,,9,3,10.1002/smll.202205743,,"[Li, Lei; Li, Yanyan; Li, Fayan; Zhang, Xinyu; Zheng, Zhiping] Southern Univ Sci & Technol, Minist Educ, Dept Chem, Guangdong Prov Key Lab Energy Mat Elect Power, Shenzhen 518055, Peoples R China; [Li, Lei; Li, Yanyan; Li, Fayan; Zhang, Xinyu; Zheng, Zhiping] Southern Univ Sci & Technol, Minist Educ, Key Lab Energy Convers & Storage Technol, Shenzhen 518055, Peoples R China; [Li, Lei; Zhang, Yanan] Shaanxi Univ Sci & Technol, Shaanxi Key Lab Chem Addit Ind, Coll Chem & Chem Engn, Xian 710021, Shaanxi, Peoples R China; [Xu, Ming; Zheng, Jiaxin] Peking Univ, Shenzhen Grad Sch, Sch Adv Mat, Shenzhen 518055, Peoples R China; [Wang, Yameng; Zeng, Lin] Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China",,"Single-atom catalysts (SACs) are of tremendous current research due to maximized use of metal atoms and enhanced activity and selectivity for a great variety of chemical reactions. Hierarchically structured SACs have been explored to further increase the number and accessibility of active sites to realize the full potentials of SACs. However, though plausible-sounding, these supposed advantages of hierarchically structured SACs are largely untested. The assumed enhancing effects on the formation of intermediates on and the overall reaction kinetics remain largely unknown. Herein is reported a Fe-SAC with a hierarchical hollow structure (Fe/HH) that showed excellent activity in oxygen reduction reaction and proton exchange membrane fuel cell. Comparative experimental and computational studies with respect to Fe/SS-the counterpart of Fe/HH with a compact primary structure-reveal a significantly increased number of active sites and their utilization in Fe/HH as reflected by the facilitated formation of the rate-determining-step intermediate Fe-OOH*. This work thus establishes unambiguously the connection between the increased utilization of active sites and the enhanced kinetics of the electrocatalytic reduction of oxygen.",active site utilization; hierarchical structures; oxygen reduction reactions; reaction kinetics; single-atom catalysts,N-C ELECTROCATALYST; ALKALINE,active site utilization;hierarchical structures;oxygen reduction reactions;reaction kinetics;single-atom catalysts;N-C ELECTROCATALYST;ALKALINE,zhangxl@sustech.edu.cn; zhengjx@pkusz.edu.cn; zhengzp@sustech.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1613-6810,,,36372523,English,SMALL,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000882541200001,2-s2.0-85142076152,China,sustech.edu.cn,Southern Univ Sci & Technol;Shaanxi Univ Sci & Technol;Peking Univ,"Southern Univ Sci & Technol, China;Shaanxi Univ Sci & Technol, China;Peking Univ, China","Li, Lei; Xu, Ming; Wang, Yameng; Zhang, Yanan; Li, Yanyan; Li, Fayan; Zeng, Lin; Zhang, Xinyu; Zheng, Jiaxin; Zheng, Zhiping"
"Cheng, H., Gui, R.J., Liu, S., Xie, Y., Wu, C.Z.",Local structure engineering for active sites in fuel cell electrocatalysts,2020,SCIENCE CHINA-CHEMISTRY,63,11,,1543,1556,14,17,10.1007/s11426-020-9828-5,,"[Cheng, Han; Gui, Renjie; Liu, Si; Xie, Yi; Wu, Changzheng] Univ Sci & Technol China, CAS Key Lab Mech Behav & Design Mat, Collaborat Innovat Ctr Chem Energy Mat iChEM, Hefei Natl Lab Phys Sci Microscale,CAS Ctr Excel, Hefei 230026, Peoples R China; [Xie, Yi; Wu, Changzheng] Hefei Comprehens Natl Sci Ctr, Inst Energy, Hefei 230026, Peoples R China",,"In this review, we surveyed the significance of local structure engineering on electrocatalysts and electrodes for the performance of oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). Both on precious metal catalysts (PMC) and non-precious metal catalysts (NPMC), the main methods to modulate local structure of active sites have been summarized. By change of atomic coordination, modulation of bonding distortion and synergy effect from hierarchical structure, local structure engineering has influence on the intrinsic activity and stability of electrocatalysts. Moreover, we emphasized the intimate correlation between lyophobicity of electrocatalysts and membrane electrodes by local structure engineering. Our review aimed to inspire the exploration of advanced electrocatalysts and mechanism study for PEMFCs based on local structure engineering.",local structure engineering; proton exchange membrane fuel cells; oxygen reduction reaction; active sites,OXYGEN REDUCTION REACTION; PROTON-EXCHANGE MEMBRANE; FE-N-C; DENSITY-FUNCTIONAL-THEORY; NITROGEN-DOPED CARBON; HIGH-SURFACE-AREA; ENERGY-CONVERSION; CATALYTIC-ACTIVITY; ELECTRIC VEHICLES; CATHODE CATALYSTS,local structure engineering;proton exchange membrane fuel cells;oxygen reduction reaction;active sites;PROTON-EXCHANGE MEMBRANE;FE-N-C;DENSITY-FUNCTIONAL-THEORY;NITROGEN-DOPED CARBON;HIGH-SURFACE-AREA;ENERGY-CONVERSION;CATALYTIC-ACTIVITY;ELECTRIC VEHICLES;CATHODE CATALYSTS,czwu@ustc.edu.cn,,"16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA",,,,SCIENCE PRESS,1674-7291,,,,English,SCI CHINA CHEM,Review,WoS,Chemistry,WOS:000578954100003,2-s2.0-85092635158,China,ustc.edu.cn,Univ Sci & Technol China;Hefei Comprehens Natl Sci Ctr,"Univ Sci & Technol China, China;Hefei Comprehens Natl Sci Ctr, China","Cheng, Han; Gui, Renjie; Liu, Si; Xie, Yi; Wu, Changzheng"
"Zhao, D., Shui, J., Chen, C., Comment, S., Reprogle, B., Liu, D.J.","Low-cost, high-efficiency non-pgm cathode catalysts using MOFs as precursors",2013,ECS Transactions,50,2,,1861,1868,,3,10.1149/05002.1861ecst,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84885809806&doi=10.1149%2F05002.1861ecst&partnerID=40&md5=848bb67dc1e804bd6edb6e8b71b25c47,"Argonne National Laboratory, Lemont, IL, United States","Zhao, Dan, Argonne National Laboratory, Lemont, IL, United States; Shui, Jianglan, Argonne National Laboratory, Lemont, IL, United States; Chen, Chen, Argonne National Laboratory, Lemont, IL, United States; Comment, S., Argonne National Laboratory, Lemont, IL, United States; Reprogle, Briana M., Argonne National Laboratory, Lemont, IL, United States; Liu, Dijia, Argonne National Laboratory, Lemont, IL, United States","Oxygen reduction reaction (ORR) represents the most important electrochemical process in a proton exchange membrane fuel cell (PEMFC). An effective catalyst with improved active site design and support architecture could reduce the kinetic barrier, lower the electrochemical overpotential, and enhance the mass transfer as well as energy conversion efficiency. Conventional PEMFC cathode catalysts contain the platinum group metals (PGMs) which contributes significant fraction of the overall stack cost. We report herein our recent progress in developing low-cost, high-efficiency non-PGM catalysts for fuel cell using metal-organic framework (MOF) based compounds as the precursors. New approaches to prepare the catalysts with high surface area and active site density are demonstrated, supported by detailed characterization studies.",,Catalyst activity; Cathodes; Conversion efficiency; Costs; Electrolytic reduction; Mass transfer; Metal-Organic Frameworks; Organometallics; Oxygen reduction reaction; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Active site density; Cathode catalyst; Characterization studies; Electrochemical process; High surface area; Non-PGM catalysts; Platinum group metals; Recent progress; Solid electrolytes,Catalyst activity;Cathodes;Conversion efficiency;Costs;Electrolytic reduction;Mass transfer;Metal-Organic Frameworks;Organometallics;Oxygen reduction reaction;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Active site density;Cathode catalyst;Characterization studies;Electrochemical process;High surface area;Non-PGM catalysts;Platinum group metals;Recent progress;Solid electrolytes,"D.-J. Liu; Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, IL 60439, 9700 S. Cass Ave, United States; email: djliu@anl.gov",,,"12th Polymer Electrolyte Fuel Cell Symposium, PEFC 2012 - 222nd ECS Meeting",,,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-84885809806,,United States,anl.gov,,,"Zhao, D.; Shui, J.; Chen, C.; Comment, S.; Reprogle, B.; Liu, D.-J."
"Cui, L.T., Wang, Y., Zhou, Z.Y., Lin, W.F., Sun, S.G.",Low-cost transition metal-nitrogen-carbon electrocatalysts for the oxygen reduction reaction: operating conditions from aqueous electrolytes to fuel cells,2023,Sustainable Energy and Fuels,8,2,,178,191,,3,10.1039/d3se01275a,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85180967158&doi=10.1039%2Fd3se01275a&partnerID=40&md5=87c3690c7d72f73863d77caf203d010b,"College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China; Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen, Fujian, China; Department of Chemical Engineering, Loughborough University, Loughborough, Leicestershire, United Kingdom","Cui, Liting, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China; Wang, Yucheng, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen, Fujian, China; Zhou, Zhiyou, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen, Fujian, China; Lin, Wen Feng, Department of Chemical Engineering, Loughborough University, Loughborough, Leicestershire, United Kingdom; Sun, Shigang, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China","After decades of effort, the performance of low-cost transition metal-nitrogen-carbon (M-N-C) catalysts has been significantly improved, positioning them as promising catalysts for the oxygen reduction reaction in proton-exchange-membrane fuel cells (PEMFCs). Despite this progress, compared to traditional commercial Pt/C catalysts, the practical application of M-N-C catalysts in PEMFCs is hindered by their inferior performance in acidic environments. In this perspective, we first summarize the current status of M-N-C catalysts in terms of activity and stability, and compare their performance with that of Pt/C catalysts. Then we discuss the fundamental research challenges associated with M-N-C catalysts, which are primarily related to (i) conducting basic research with tests exclusively using oversimplified aqueous electrolytes that limits exploration in practical fuel cell environments; (ii) lacking operando characterization methods under fuel cell working conditions; and (iii) the complexity of catalyst structures and fuel cell operating environments causing difficulty in M-N-C catalyst research. Lastly, we propose key advances that need to be made in the future to address these fundamental challenges, including the rational design of fit-for-purpose catalysts based on more cost-effective and efficient modelling, preparing model/quasi-model catalysts with defined and controllable structures, and developing operando characterization techniques for PEMFCs. By combined study using model/quasi-model catalysts, operando characterization methods and atomistic modeling, we can deeply understand the “structure-performance” relationship of the catalysts at various scales and develop next generation M-N-C catalysts that can meet the increased demand for PEMFCs. © 2024 The Royal Society of Chemistry.",,Carbon; Catalyst activity; Cost effectiveness; Electrocatalysts; Electrolytes; Electrolytic reduction; Nitrogen; Oxygen; Proton exchange membrane fuel cells (PEMFC); Aqueous electrolyte; Carbon catalysts; Low-costs; Nitrogen-carbon; Operando; Oxygen reduction reaction; Performance; Proton-exchange membranes fuel cells; Pt/C catalysts; ]+ catalyst; Transition metals; carbon; catalyst; design; electrolyte; fuel cell; nitrogen; performance assessment,Carbon;Catalyst activity;Cost effectiveness;Electrocatalysts;Electrolytes;Electrolytic reduction;Nitrogen;Oxygen;Proton exchange membrane fuel cells (PEMFC);Aqueous electrolyte;Carbon catalysts;Low-costs;Nitrogen-carbon;Operando;Oxygen reduction reaction;Performance;Proton-exchange membranes fuel cells;Pt/C catalysts;]+ catalyst;Transition metals;catalyst;design;electrolyte;fuel cell;performance assessment,"Y.-C. Wang; State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China; email: wangyc@xmu.edu.cn; W.-F. Lin; Department of Chemical Engineering, Loughborough University, Loughborough, Leicestershire, LE11 3TU, United Kingdom; email: w.lin@lboro.ac.uk; S.-G. Sun; State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China; email: sgsun@xmu.edu.cn",,,,,,Royal Society of Chemistry,,,,,English,Sustain. Energy Fuels,Review,Scopus,,2-s2.0-85180967158,,China;United Kingdom,xmu.edu.cn,,,"Cui, L.-T.; Wang, Y.; Zhou, Z.-Y.; Lin, W.-F.; Sun, S.-G."
"Atanasoski, R.",Low platinum and non-precious metal catalysts for PEM fuel cell application,2007,ACS National Meeting Book of Abstracts,,,,,,,0,,https://www.scopus.com/inward/record.uri?eid=2-s2.0-37348998923&partnerID=40&md5=e2986925ab71da3c1fa6c9d5bd62f05b,"Fuel Cell Components Program, 3M USA, Saint Paul, MN, United States","Atanasoski, Radoslav T., Fuel Cell Components Program, 3M USA, Saint Paul, MN, United States","The cost of platinum is one of the major obstacles in the commercialization PEM fuel cells. While low platinum loading is a necessary requirement, the catalyst material must also possess high durability while preserving the high catalytic activity. There is a limit as to how well the traditional catalyst, platinum dispersed on carbon support, can respond to these requirements. Decreasing the platinum particle size reaches a point of diminishing return once the 2 - 3 nm size is approached. Nanostructured thin film catalysts (NSTF) are original and unique to 3M. NSTF is fundamentally different mostly in that the catalyst support contains no high-surface-area carbon. This support allows for high specific activity of the applied catalysts to be achieved and for a simpler, dry processing to be used in its manufacture. NSTF catalyst offers many advantages, both on fundamental and applied levels. In the development of the non-precious metal catalysts, 3M adopted two paths: vacuum processes and synthesis of nanoparticles finely dispersed on high surface area substrate. Due to vast area open for new catalysts systems outside the platinum group metals, the effort was enhanced by the high throughput approach. In order to identify the nature of the active centers, intensive physicochemical characterization of the new catalytic materials was carried out, the results of which were followed by ab initio modelling.",,,,"R. Atanasoski; Corporate R and D, Fuel Cell Program, 3M, 3M Center 201-02-S-05, St. Paul, MN 55144-1000, United States; email: rtatanasoski@mmm.com",,,233rd ACS National Meeting,,,,00657727,084127438X; 9780841274082; 0841269556; 0841274088; 9780841269941; 9780841224414; 9780841274266; 9780841269859; 0841274266; 9780841274389,ACSRA,,English,ACS Natl. Meet. Book Abstr.,Conference paper,Scopus,,2-s2.0-37348998923,,United States,mmm.com,,,"Atanasoski, R."
"Zhang, Y., Hu, C., Tang, D., Su, Z.",Machine-learning assisted screening of MXene-supported single-atom catalysts for oxygen reduction,2025,Journal of Materials Chemistry A,13,39,,33897,33906,,0,10.1039/d5ta04542h,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105017962774&doi=10.1039%2Fd5ta04542h&partnerID=40&md5=a0a5341ff7e392b36ac864677894a7be,"College of Chemistry, Key Laboratory of Green Chemistry and Technology, Ministry of Education, Chengdu, Sichuan, China; International Academy of Targeted Therapeutics and Innovation, Chongqing University of Arts and Science, Chongqing, Yongchuan, China","Zhang, Yan, College of Chemistry, Key Laboratory of Green Chemistry and Technology, Ministry of Education, Chengdu, Sichuan, China, International Academy of Targeted Therapeutics and Innovation, Chongqing University of Arts and Science, Chongqing, Yongchuan, China; Hu, Changwei, College of Chemistry, Key Laboratory of Green Chemistry and Technology, Ministry of Education, Chengdu, Sichuan, China; Tang, Dianyong, International Academy of Targeted Therapeutics and Innovation, Chongqing University of Arts and Science, Chongqing, Yongchuan, China; Su, Zhishan, College of Chemistry, Key Laboratory of Green Chemistry and Technology, Ministry of Education, Chengdu, Sichuan, China","The strategic design of cost-effective and high-performance multifunctional electrocatalysts for the oxygen reduction reaction (ORR) is of great importance, as the ORR is a crucial half-reaction in proton-exchange membrane fuel cells (PEMFCs) and metal-air batteries. In this study, Ti<inf>2</inf>NO<inf>2</inf> MXene and its derivatives with defective surfaces (O or Ti vacancies) are selected as supports for single-atom catalysts (SACs), and their ORR electrocatalytic performances under acidic conditions are systematically investigated using density functional theory (DFT) calculations. The calculations reveal that Pd/Ti<inf>2</inf>NO<inf>2</inf> and Rh/Ti<inf>2</inf>NO<inf>2</inf> exhibit outstanding ORR electrocatalytic activity, with an overpotential (η<inf>ORR</inf>) of 0.31 V and 0.69 V, respectively, along with high selectivity against hydrogen evolution reaction (HER) competition. A significant correlation between ΔG<inf>O<inf>2</inf>*</inf>/ΔG<inf>OH*</inf> and η<inf>ORR</inf> for TM/Ti<inf>2</inf>NO<inf>2</inf> and TM/Ti<inf>2</inf>NO<inf>2</inf>-Ov SACs indicates that O<inf>2</inf>* and OH* species serve as key intermediates throughout the ORR process. Furthermore, machine learning analysis reveals that the combination of the main descriptors, that is, the feature D generated by SISSO, the Bader charge of the single atoms, and the number of outermost d electrons of the single atoms, plays a critical role in ORR activity. This work is expected to provide valuable insights for the accelerated discovery of advanced ORR electrocatalysts and broaden the application potential of MXene-based materials in energy conversion and storage. © 2025 The Royal Society of Chemistry.",,Atoms; Catalyst supports; Cost effectiveness; Density functional theory; Design for testability; Electrocatalysts; Electrolytic reduction; Hydrogen evolution reaction; Learning systems; Oxygen; Oxygen reduction reaction; Thulium compounds; Titanium compounds; Cost effective; Machine-learning; Multifunctionals; NO 2; Oxygen Reduction; Performance; Single-atoms; Strategic design; ]+ catalyst; Proton exchange membrane fuel cells (PEMFC),Atoms;Catalyst supports;Cost effectiveness;Density functional theory;Design for testability;Electrocatalysts;Electrolytic reduction;Hydrogen evolution reaction;Learning systems;Oxygen;Oxygen reduction reaction;Thulium compounds;Titanium compounds;Cost effective;Machine-learning;Multifunctionals;NO 2;Oxygen Reduction;Performance;Single-atoms;Strategic design;]+ catalyst;Proton exchange membrane fuel cells (PEMFC),"D. Tang; College of Pharmacy & International Academy of Targeted Therapeutics and Innovation, Chongqing University of Arts and Sciences, Chongqing, 402160, China; email: tangdy2008@163.com; Z. Su; Key Laboratory of Green Chemistry and Technology, Ministry of Education, National and Local Joint Engineering Laboratory of Energy Plant Biofuel Preparation and Utilization, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China; email: suzhishan@scu.edu.cn",,,,,,Royal Society of Chemistry,20507488,,JMCAE,,English,J. Mater. Chem. A,Article,Scopus,,2-s2.0-105017962774,,China,163.com,,,"Zhang, Y.; Hu, C.; Tang, D.; Su, Z."
"Nabae, Y., Nagata, S., Kusaba, K., Aoki, T., Hayakawa, T., Tanida, H., Imai, H., Hori, K., Yamamoto, Y., Arai, S., Ohyama, J.",Magnetic purification of non-precious metal fuel cell catalysts for obtaining atomically dispersed Fe centers,2020,Catalysis Science and Technology,10,2,,493,501,,18,10.1039/c9cy02304f,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85078701720&doi=10.1039%2Fc9cy02304f&partnerID=40&md5=6b21d5a8ad39755d0a833e177e5d5786,"Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; Device Analysis Department, Nissan Arc, Ltd., Yokosuka, Kanagawa, Japan; Technical Department, Institute of Science Tokyo, Tokyo, Japan; Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya, Aichi, Japan; Faculty of Advanced Science and Technology, Kumamoto University, Kumamoto, Kumamoto, Japan","Nabae, Yuta, Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; Nagata, Shinsuke, Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; Kusaba, Keizo, Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; Aoki, Tsutomu, Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; Hayakawa, Teruaki, Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; Tanida, Hajime, Device Analysis Department, Nissan Arc, Ltd., Yokosuka, Kanagawa, Japan; Imai, Hideto, Device Analysis Department, Nissan Arc, Ltd., Yokosuka, Kanagawa, Japan; Hori, Katsuaki, Technical Department, Institute of Science Tokyo, Tokyo, Japan; Yamamoto, Yuta, Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya, Aichi, Japan; Arai, Shigeo, Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya, Aichi, Japan; Ohyama, Junya, Faculty of Advanced Science and Technology, Kumamoto University, Kumamoto, Kumamoto, Japan","The development of non-precious metal oxygen reduction catalysts is vital for enabling the commercialization of proton exchange membrane fuel cells, and Fe/N/C catalysts prepared by the pyrolysis of Fe, N, and C-containing precursors have been widely studied for this purpose. The role of atomically dispersed Fe centers in the reaction mechanisms of Fe/N/C catalysts has been widely studied. This paper demonstrates a facile magnetic purification approach for obtaining atomically dispersed Fe centers for conducting superior Fe/N/C catalysis. Upon treatment of a Fe/N/C catalyst prepared by pyrolyzing Fe-containing polyimide nanoparticles with a magnet, the clustered Fe species (metallic Fe and Fe<inf>3</inf>C) observed before the purification were successfully eliminated, and atomically dispersed Fe species were clearly observed by microscopy. Comparison of the oxygen reduction activities of the Fe/N/C catalysts before and after the magnetic purification in half-cell and fuel cell testing revealed the retention of the high catalytic performances of the Fe/N/C catalysts. Furthermore, no loss in catalytic performance or durability was observed after the magnetic purification. © The Royal Society of Chemistry 2020.",,Catalysts; Electrolytic reduction; Fuel purification; Iron; Nanomagnetics; Oxygen; Precious metals; Catalytic performance; Fuel-cell testing; High catalytic performance; Magnetic purification; Non-precious metals; Oxygen Reduction; Oxygen reduction catalysts; Reaction mechanism; Proton exchange membrane fuel cells (PEMFC),Catalysts;Electrolytic reduction;Fuel purification;Iron;Nanomagnetics;Oxygen;Precious metals;Catalytic performance;Fuel-cell testing;High catalytic performance;Magnetic purification;Non-precious metals;Oxygen Reduction;Oxygen reduction catalysts;Reaction mechanism;Proton exchange membrane fuel cells (PEMFC),"Y. Nabae; Department of Materials Science and Engineering, Tokyo Institute of Technology, Meguro-ku, Tokyo, 2-12-1 S8-26, Ookayama, 152-8552, Japan; email: nabae.y.aa@m.titech.ac.jp",,,,,,Royal Society of Chemistry,20444753,,CSTAG,,English,Catal. Sci. Technolog.,Article,Scopus,,2-s2.0-85078701720,,Japan,m.titech.ac.jp,,,"Nabae, Y.; Nagata, S.; Kusaba, K.; Aoki, T.; Hayakawa, T.; Tanida, H.; Imai, H.; Hori, K.; Yamamoto, Y.; Arai, S.; Ohyama, J."
"Sun, T., Wu, Q., Zhuo, O., Jiang, Y.F., Bu, Y.F., Yang, L.J., Wang, X.Z., Hu, Z.",Manganese oxide-induced strategy to high-performance iron/nitrogen/carbon electrocatalysts with highly exposed active sites,2016,NANOSCALE,8,16,,8480,8485,6,43,10.1039/c6nr00760k,,"[Wu, Qiang; Hu, Zheng] Nanjing Univ, Sch Chem & Chem Engn, Jiangsu Prov Lab NanoTechnol, Nanjing 210023, Jiangsu, Peoples R China; Nanjing Univ, Sch Chem & Chem Engn, Key Lab Mesoscop Chem MOE, Nanjing 210023, Jiangsu, Peoples R China",,"Iron/nitrogen/carbon (Fe/N/C) catalyst is so far the most promising non-precious metal electrocatalyst for oxygen reduction reaction (ORR) in acidic medium, whose performance depends closely on the synthesis chemistry. Herein, we report a MnOx-induced strategy to construct the Fe/N/C with highly exposed Fe-Nx active sites, which involves the uniform spreading of polyaniline on hierarchical N-doped carbon nanocages by a reactive-template polymerization, followed by the successive iron incorporation and polyaniline pyrolysis. The resulting Fe/N/C demonstrates an excellent ORR performance, including an onset potential of 0.92 V (vs. RHE), four electron selectivity, superb stability and immunity to methanol crossover. The excellent performance is well correlated with the greatly enhanced surface active sites of the catalyst stemming from the unique MnOx-induced strategy. This study provides an efficient approach for exploring the advanced ORR electrocatalysts by increasing the exposed active sites.",,OXYGEN REDUCTION REACTION; PEM FUEL-CELL; METAL ELECTROCATALYSTS; CARBON NANOCAGES; FE/N/C-CATALYSTS; TRANSITION-METAL; IRON; POLYANILINE; ALKALINE; POLYMER,OXYGEN REDUCTION REACTION;PEM FUEL-CELL;METAL ELECTROCATALYSTS;CARBON NANOCAGES;FE/N/C-CATALYSTS;TRANSITION-METAL;IRON;POLYANILINE;ALKALINE;POLYMER,wqchem@nju.edu.cn; zhenghu@nju.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2040-3364,,,27055582,English,NANOSCALE,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000374788800006,,China,nju.edu.cn,Nanjing Univ;Sch Chem & Chem Engn,"Nanjing Univ, China;Sch Chem & Chem Engn, China","Sun, Tao; Wu, Qiang; Zhuo, Ou; Jiang, Yufei; Bu, Yongfeng; Yang, Lijun; Wang, Xizhang; Hu, Zheng"
"Zagal, J.H., Specchia, S., Atanassov, P.",Mapping transition metal-MN4 macrocyclic complex catalysts performance for the critical reactivity descriptors,2021,Current Opinion in Electrochemistry,27,,100683,,,,68,10.1016/j.coelec.2020.100683,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85100614517&doi=10.1016%2Fj.coelec.2020.100683&partnerID=40&md5=80875f0742ccc3a890c5ad1d84c7bde8,"Departamento de Química de los Materiales, Universidad de Santiago de Chile, Santiago, RM, Chile; Department of Applied Science and Technology, Politecnico di Torino, Turin, TO, Italy; Chemical & Biomolecular Engineering and National Fuel Cell Research Center, University of California, Irvine, Irvine, CA, United States","Zagal, Jose H., Departamento de Química de los Materiales, Universidad de Santiago de Chile, Santiago, RM, Chile; Specchia, Stefania, Department of Applied Science and Technology, Politecnico di Torino, Turin, TO, Italy; Atanassov, Plamen B., Chemical & Biomolecular Engineering and National Fuel Cell Research Center, University of California, Irvine, Irvine, CA, United States","There has been a significant progress toward the development of highly active and stable platinum group metal-free (PGM-free) electrocatalysts for the oxygen reduction reaction (ORR) in polymer electrolyte fuel cells, promising a low-cost replacement for Pt group electrocatalysts. However, the success of such developments depends on the implementation of PGM-free electrocatalysts that are not only highly active but importantly, they also exhibit long-term durability under polymer electrolyte fuel cell operating conditions. This manuscript is an overview of the current status of a specific, most advanced class of PGM-free electrocatalysts: transition metal–nitrogen–carbon ORR catalysts. We present an overview for the understanding of catalysts’ performance descriptors for metal–nitrogen–carbon materials. © 2020 Elsevier B.V.",Active site density (SD); Activity descriptors; MN4 transition metal–molecular catalysts; ORR electrocatalysts; Platinum group metal-free (PGM-Free) electrocatalysts; Turn-over frequency (TOF),Carbon; Electrocatalysts; Electrolysis; Electrolytic reduction; Nitrogen; Oxygen reduction reaction; Platinum metals; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Transition metals; Carbon material; Current status; Long term durability; Macrocyclic complex; Operating condition; Platinum group metals; Polymer electrolyte fuel cells; Reactivity descriptors; Polyelectrolytes,Active site density (SD);Activity descriptors;MN4 transition metal–molecular catalysts;ORR electrocatalysts;Platinum group metal-free (PGM-Free) electrocatalysts;Turn-over frequency (TOF);Carbon;Electrocatalysts;Electrolysis;Electrolytic reduction;Nitrogen;Oxygen reduction reaction;Platinum metals;Proton exchange membrane fuel cells (PEMFC);Solid electrolytes;Transition metals;Carbon material;Current status;Long term durability;Macrocyclic complex;Operating condition;Platinum group metals;Polymer electrolyte fuel cells;Reactivity descriptors;Polyelectrolytes,"J.H. Zagal; Laboratorio de Electrocatálisis y Electrónica Molecular, Departamento de Química de Los Materials, Universidad de Santiago de Chile, Santiago, Ada. Bernardo O'higgins 3363, 9170022, Chile; email: jose.zagal@usach.cl",,,,,,Elsevier B.V.,24519103,,,,English,Curr. Opin. Electrochem.,Review,Scopus,,2-s2.0-85100614517,,Chile;Italy;United States,usach.cl,,,"Zagal, J.H.; Specchia, S.; Atanassov, P."
"Specchia, S., Atanassov, P., Zagal, J.H.",Mapping transition metal–nitrogen–carbon catalyst performance on the critical descriptor diagram,2021,Current Opinion in Electrochemistry,27,,100687,,,,69,10.1016/j.coelec.2021.100687,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85100661574&doi=10.1016%2Fj.coelec.2021.100687&partnerID=40&md5=7260ebb51604e209cbd26c74857ed1ba,"Department of Applied Science and Technology, Politecnico di Torino, Turin, TO, Italy; Chemical & Biomolecular Engineering and National Fuel Cell Research Center, University of California, Irvine, Irvine, CA, United States; Departamento de Química de los Materiales, Universidad de Santiago de Chile, Santiago, RM, Chile","Specchia, Stefania, Department of Applied Science and Technology, Politecnico di Torino, Turin, TO, Italy; Atanassov, Plamen B., Chemical & Biomolecular Engineering and National Fuel Cell Research Center, University of California, Irvine, Irvine, CA, United States; Zagal, Jose H., Departamento de Química de los Materiales, Universidad de Santiago de Chile, Santiago, RM, Chile","Platinum group metal–free electrocatalysts and in particular transition metal–nitrogen–carbon catalysts are becoming interesting candidates as cheap alternatives to Pt-based catalysts for the oxygen reduction reaction in polymer electrolyte fuel cells. Unified activity-stability correlations are needed to provide practical guidelines for a rational catalyst design. A discussion of different characterization techniques for studying possible activity descriptors is presented, with a specific focus on active site density and turnover frequency. These descriptors will be associated to the morphology of the various transition metal–nitrogen–carbon electrocatalysts investigated in the recent literature. The underlined correlation for this class of platinum group metal–free electrocatalysts offers important insights required for the development of the next generation of catalytic materials with enhanced stability that can solve the main activity and durability barriers needed for the replacement of Pt-based counterparts. © 2021 Elsevier B.V.",Activity descriptors; Gravimetric active site density (SD); Platinum group metal (PGM)–free electrocatalysts; Transition metal–nitrogen–carbon (M–N–C) catalysts; Turnover frequency (TOF),Carbon; Electrocatalysts; Electrolysis; Electrolytic reduction; Nitrogen; Oxygen reduction reaction; Platinum; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Active site density; Catalytic materials; Characterization techniques; Enhanced stability; Platinum group metals; Polymer electrolyte fuel cells; Practical guidelines; Turnover frequency; Transition metals,Activity descriptors;Gravimetric active site density (SD);Platinum group metal (PGM)–free electrocatalysts;Transition metal–nitrogen–carbon (M–N–C) catalysts;Turnover frequency (TOF);Carbon;Electrocatalysts;Electrolysis;Electrolytic reduction;Nitrogen;Oxygen reduction reaction;Platinum;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Active site density;Catalytic materials;Characterization techniques;Enhanced stability;Platinum group metals;Polymer electrolyte fuel cells;Practical guidelines;Turnover frequency;Transition metals,"S. Specchia; Department of Applied Science & Technology, Politecnico di Torino, Torino, Corso Duca Degli Abruzzi 24, 10129, Italy; email: stefania.specchia@polito.it",,,,,,Elsevier B.V.,24519103,,,,English,Curr. Opin. Electrochem.,Review,Scopus,,2-s2.0-85100661574,,Italy;United States;Chile,polito.it,,,"Specchia, S.; Atanassov, P.; Zagal, J.H."
"Abbasi, R., Setzler, B.P., Yan, Y.",Material and system development needs for widespread deployment of hydroxide exchange membrane fuel cells in light-duty vehicles,2023,Energy and Environmental Science,16,10,,4404,4422,,13,10.1039/d3ee01394d,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85169508188&doi=10.1039%2Fd3ee01394d&partnerID=40&md5=0f5f10cb24d50234fbe13d904a228c00,"Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, United States","Abbasi, Reza, Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, United States; Setzler, Brian P., Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, United States; Yan, Yushan, Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, United States","The hydroxide exchange membrane fuel cell (HEMFC) is a promising alternative to the proton exchange membrane fuel cell (PEMFC) and offers cost savings in stack component materials. In this study, we determine and analyze the cost of HEMFC systems for light-duty vehicle applications for the first time by developing a comprehensive HEMFC system model. More specifically, (i) we analyze the volumetric and cost-based activity of state-of-the-art carbon-supported precious metal (PM)-containing and PM-free oxygen reduction reaction (ORR) and hydrogen oxidation reaction (HOR) electrocatalysts. Based on the incorporation of the activity of the ORR-HOR electrocatalyst pairs into the HEMFC system cost analysis, we conclude that PM-containing PdMo/C and Ru<inf>7</inf>Ni<inf>3</inf>/C are the best ORR and HOR electrocatalysts for implementation in HEMFC systems; (ii) we perform a HEMFC system cost analysis based on the best state-of-the-art carbon-supported PM-free ORR-HOR electrocatalyst pair ((Fe-N-C)-Ni/N-doped C). We also compare the system cost of HEMFCs and PEMFCs based on the best state-of-the-art carbon-supported ORR and HOR electrocatalysts. Our comparison shows that the HEMFC system has a cheaper stack but a more expensive balance of plant (BOP) than the PEMFC system, resulting in a higher HEMFC system cost. The higher HEMFC system cost is due to the electrochemically driven CO<inf>2</inf> separator (EDCS) cost and higher humidification management system cost caused by the lower cathode outlet relative humidity of the HEMFC compared with that of the PEMFC; (iii) we determine the material and system developments needed to decrease the HEMFC system cost to $30 per kW<inf>Net</inf> required for cost competitiveness with internal combustion engine vehicles (ICEVs) based on (PdMo/C-Ru<inf>7</inf>Ni<inf>3</inf>/C) and ((Fe-N-C)-Ni/N-doped C) ORR-HOR electrocatalyst pairs. We also perform a single variable sensitivity analysis and demonstrate the relative importance of EDCS operating parameters: H<inf>2</inf> consumed to CO<inf>2</inf> removed ratio, pressure drop, and area-based cost. Our analysis indicates that EDCS pressure drop significantly impacts the overall HEMFC system cost, comparable to the area-based cost, and that one must monitor its values in future studies; and (iv) we present a detailed stack and BOP cost and voltage-loss breakdown for all the systems studied in this paper and identify the cost and voltage-loss drivers. Overall, our system analysis provides invaluable and transformational guidelines and enables more targeted and informed future material and system component developments by identifying the highest cost and voltage-loss drivers in HEMFC systems and providing material and system developments needed to reach full cost parity with ICEVs. © 2023 The Royal Society of Chemistry.",,Carbon; Carbon dioxide; Cost benefit analysis; Electrolysis; Electrolytic reduction; Nickel compounds; Proton exchange membrane fuel cells (PEMFC); Sensitivity analysis; Vehicles; Fuel cell system; Hydrogen oxidation reaction; Hydroxide exchange membranes; Material development; Membrane fuel cells; Oxygen reduction reaction; Proton-exchange membranes fuel cells; State of the art; System costs; System development; Electrocatalysts; cost analysis; fuel cell; hydrogen; membrane; precious metal; pressure drop; relative humidity,Carbon;Carbon dioxide;Cost benefit analysis;Electrolysis;Electrolytic reduction;Nickel compounds;Proton exchange membrane fuel cells (PEMFC);Sensitivity analysis;Vehicles;Fuel cell system;Hydrogen oxidation reaction;Hydroxide exchange membranes;Material development;Membrane fuel cells;Oxygen reduction reaction;Proton-exchange membranes fuel cells;State of the art;System costs;System development;Electrocatalysts;cost analysis;fuel cell;hydrogen;membrane;precious metal;pressure drop;relative humidity,"R. Abbasi; Center for Clean Hydrogen, Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, 150 Academy Street, 19716, United States; email: abbasi2@wisc.edu; Y. Yan; Center for Clean Hydrogen, Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, 150 Academy Street, 19716, United States; email: yanys@udel.edu",,,,,,Royal Society of Chemistry,17545692,,,,English,Energy Environ. Sci.,Article,Scopus,,2-s2.0-85169508188,,United States,wisc.edu,,,"Abbasi, R.; Setzler, B.P.; Yan, Y."
"Xia, W., Hou, Z.F., Tang, J., Li, J.J., Chaikittisilp, W., Kim, Y.N., Muraoka, K., Zhang, H.J., He, J.P., Han, B.X., Yamauchi, Y.",Materials informatics-guided superior electrocatalyst: A case of pyrolysis-free single-atom coordinated with N-graphene nanomesh,2022,NANO ENERGY,94,,106868,,,10,67,10.1016/j.nanoen.2021.106868,,"[Xia, Wei; Tang, Jing; Zhang, Hongjuan; Han, Buxing] East China Normal Univ, Sch Chem & Mol Engn, Shanghai Key Lab Green Chem & Chem Proc, Shanghai 200062, Peoples R China; [Hou, Zhufeng] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Peoples R China; [Li, Jingjing; He, Jianping] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Jiangsu Key Lab Mat & Technol Energy Convers, Nanjing 210016, Peoples R China; [Chaikittisilp, Watcharop; Kim, Yena; Yamauchi, Yusuke] Natl Inst Mat Sci NIMS, JST ERATO Yamauchi Mat Space Tecton Project, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan; [Chaikittisilp, Watcharop] Natl Inst Mat Sci NIMS, Res & Serv Div Mat Data & Integrated Syst MaDIS, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan; [Kim, Yena; Yamauchi, Yusuke] Natl Inst Mat Sci NIMS, Int Ctr Mat Nanoarchitecton WPI MANA, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan; [Muraoka, Koki] Lawrence Berkeley Natl Lab, Energy Technol Area, 1 Cyclotron Rd, Berkeley, CA 94720 USA; [Yamauchi, Yusuke] Univ Queensland, Australian Inst Bioengn & Nanotechnol AIBN, Brisbane, Qld 4072, Australia; [Muraoka, Koki] Univ Tokyo, Dept Chem Syst Engn, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan",,"In this work, we apply materials informatics (MI) techniques for property prediction of nanoporous carbon-based electrocatalyst for oxygen reduction reaction (ORR), which is a key, but sluggish reaction in proton exchange membrane fuel cells and metal-air batteries. Nitrogen-doped graphene nanomesh (NGM) was identified as an appropriate ORR catalyst by the MI techniques, which is a useful support to producing designed nitrogen-coordinated single-atom catalysts via pyrolysis-free pathway. Herein, single-atom catalysts (FePc/NGM) with predictable structures were fabricated by anchoring iron phthalocyanine (FePc) on the MI-guided NGM. Compared with the randomly creating Fe-N-x moieties on a carbon matrix via pyrolysis, FePc were riveted onto NGM via axial interactions between Fe-N-4 moieties in FePc and nitrogen in NGM graphene matrix. As a result, Fe-N-5 with superior catalytic activity for ORR was created. The elaborately designed FePc/NGM possesses an outstanding electrocatalytic activity owing to its low-dimensional structure and the significant change in electronic and geometric structures arising from the rehybridization of Fe 3d orbitals from FePc with the nitrogen orbitals from NGM at the axial direction. This work demonstrates that fusion of experiments with material informatics is indispensable for the practice of the inorganic synthetic chemistry.",Two-dimensional; Nanoporous carbon; Composite materials; Electrocatalysis of oxygen reduction; Materials informatics techniques,OXYGEN REDUCTION REACTION; CARBON; CATALYSTS; FABRICATION; STORAGE; SITES,Two-dimensional;Nanoporous carbon;Composite materials;Electrocatalysis of oxygen reduction;Materials informatics techniques;OXYGEN REDUCTION REACTION;CARBON;CATALYSTS;FABRICATION;STORAGE;SITES,jingtang@chem.ecnu.edu.cn; CHAIKITTISILP.Watcharop@nims.go.jp; jianph@nuaa.edu.cn; y.yamauchi@uq.edu.au,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2211-2855,,,,English,NANO ENERGY,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000744015000001,2-s2.0-85122654075,China;Japan;United States;Australia,chem.ecnu.edu.cn,East China Normal Univ;Chinese Acad Sci;Nanjing Univ Aeronaut & Astronaut;Natl Inst Mat Sci NIMS;Lawrence Berkeley Natl Lab;Univ Queensland;Univ Tokyo,"East China Normal Univ, China;Chinese Acad Sci, China;Nanjing Univ Aeronaut & Astronaut, China;Natl Inst Mat Sci NIMS, Japan;Lawrence Berkeley Natl Lab, United States;Univ Queensland, Australia;Univ Tokyo, Japan","Xia, Wei; Hou, Zhufeng; Tang, Jing; Li, Jingjing; Chaikittisilp, Watcharop; Kim, Yena; Muraoka, Koki; Zhang, Hongjuan; He, Jianping; Han, Buxing; Yamauchi, Yusuke"
"Nor, M.A.A.M., Rani, M.A.A.A., Loh, K.S., Choo, T.F., Lim, K.L., Osman, S.H., Loy, A.C.M., Wong, W.Y.",Maximizing oxygen reduction reaction performance with minimal Pt: A review of high mass activity Pt-M catalysts,2025,JOURNAL OF POWER SOURCES,654,,237869,,,23,2,10.1016/j.jpowsour.2025.237869,,"[Nor, Muhamad Amirul Aiman Mohd; Rani, Muhammad Amirul Aiman Abdul; Loh, Kee Shyuan; Lim, Kean Long; Osman, Siti Hasanah; Wong, Wai Yin] Univ Kebangsaan Malaysia, Fuel Cell Inst, Bangi 43600, Selangor, Malaysia; [Choo, Thye Foo] Agensi Nuklear Malaysia, Kajang 43000, Selangor, Malaysia; [Loy, Adrian Chun Minh] Univ Melbourne, Dept Chem Engn, Parkville, VIC 3010, Australia",,"The high cost and durability of platinum limit its widespread use as an oxygen reduction reaction (ORR) catalyst. This review analyzes advancements in Pt-based catalysts, focusing on minimizing Pt loading while maintaining performance. The inherent limitations of Pt single catalysts are discussed, and Pt-M (M = transition metal) alloys, including bimetallic, trimetallic, intermetallic, and high entropy alloys, are explored. Recent progress highlights metal-organic framework (MOF)-derived catalysts, particularly single-atom catalysts (SACs), which offer tunable structures and high surface areas. Several studies demonstrate exceptional ORR performance with high mass activity, achieving half-wave potentials (E1/2) exceeding 0.9 V and Pt loadings below 2 wt%. Synthesis techniques are compared, emphasizing their impact on ORR activity and durability. The relationship between Pt-M alloy size, electronic structure, and geometric effects is explored, aiming to elucidate key performance factors. Innovations using MOFs as templates for Pt-M bimetallic catalysts are discussed along with the key synthesis techniques offering different advantages. Future perspectives include the implementation of multiscale and geometry-adaptive design strategies to further optimize next-generation ORR catalysts for cost-effective and durable proton exchange membrane fuel cell applications with ultra-low Pt loading.",Fuel cells; Pt-M alloys; Oxygen reduction reaction; Pt loading; Multiscale geometry,METAL-ORGANIC FRAMEWORKS; REDUCED GRAPHENE OXIDE; MEMBRANE FUEL-CELLS; N-C CATALYSTS; ALLOY NANOPARTICLES; TRANSITION-METALS; BIMETALLIC NANOPARTICLES; CARBON; ELECTROCATALYSTS; EFFICIENT,Fuel cells;Pt-M alloys;Oxygen reduction reaction;Pt loading;Multiscale geometry;METAL-ORGANIC FRAMEWORKS;REDUCED GRAPHENE OXIDE;MEMBRANE FUEL-CELLS;N-C CATALYSTS;ALLOY NANOPARTICLES;TRANSITION-METALS;BIMETALLIC NANOPARTICLES;CARBON;ELECTROCATALYSTS;EFFICIENT,waiyin.wong@ukm.edu.my,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:001539175400001,2-s2.0-105010222970,Malaysia;Australia,ukm.edu.my,Univ Kebangsaan Malaysia;Agensi Nuklear Malaysia;Univ Melbourne,"Univ Kebangsaan Malaysia, Malaysia;Agensi Nuklear Malaysia, Malaysia;Univ Melbourne, Australia","Nor, Muhamad Amirul Aiman Mohd; Rani, Muhammad Amirul Aiman Abdul; Loh, Kee Shyuan; Choo, Thye Foo; Lim, Kean Long; Osman, Siti Hasanah; Loy, Adrian Chun Minh; Wong, Wai Yin"
"Niu, J., Qi, W., Li, C., Mao, M., Zhang, Z., Chen, Y., Li, W., Ge, S.",Mechanisms of oxygen reduction reaction on B doped FeN4-G and FeN4-CNT catalysts for proton-exchange membrane fuel cells,2021,International Journal of Energy Research,45,6,,8524,8535,,17,10.1002/er.6388,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099236860&doi=10.1002%2Fer.6388&partnerID=40&md5=da18d9abc55506ef5037c7cca2ef836e,"School of Energy and Power Engineering, Chongqing University, Chongqing, China; School of Vehicle Engineering, Chongqing University of Technology, Chongqing, China; Technical R & D, Chongqing Changan New Energy Automobile Technology, Chongqing, China","Niu, Juntian, School of Energy and Power Engineering, Chongqing University, Chongqing, China; Qi, Wenjie, School of Vehicle Engineering, Chongqing University of Technology, Chongqing, China; Li, Chang, Technical R & D, Chongqing Changan New Energy Automobile Technology, Chongqing, China; Mao, Min, Technical R & D, Chongqing Changan New Energy Automobile Technology, Chongqing, China; Zhang, Zhigang, School of Vehicle Engineering, Chongqing University of Technology, Chongqing, China; Chen, Yong, School of Vehicle Engineering, Chongqing University of Technology, Chongqing, China; Li, Wenli, School of Vehicle Engineering, Chongqing University of Technology, Chongqing, China; Ge, Shuaishuai, School of Vehicle Engineering, Chongqing University of Technology, Chongqing, China","Density functional theory (DFT) was used to calculate the stability, oxygen reduction reaction (ORR) mechanism and activity of B-doped FeN<inf>4</inf>-CNT (carbon nano-tube [CNT]) and FeN<inf>4</inf>-G (G, graphene). The B-doped catalysts are more stable and active than that of the un-doped, especially for FeN<inf>4</inf>B2-G and FeN<inf>4</inf>B2-CNT. Based on the Mulliken charge and electrostatic potential surface of these catalysts, Fe atom is found to be the most active site for the adsorption of O-contained species. It is shown that their adsorption energies decrease in the range: O > OH > Co-ad OH > OOH > O<inf>2</inf> > H<inf>2</inf>O > H<inf>2</inf>O<inf>2</inf> on these catalysts. H<inf>2</inf>O<inf>2</inf> will be directly dissociated into two co-adsorbed OH* or O* + H<inf>2</inf>O* instead of H<inf>2</inf>O<inf>2</inf> on the graphene series catalysts, and the process of reaction (H<inf>2</inf>O<inf>2</inf> + * → 2OH*) on the active sites of the CNT series catalysts is strongly exothermic. Hence, desorption of H<inf>2</inf>O<inf>2</inf>* into the solution is difficult to proceed during the oxygen reduction process. All the catalysts are expected to promote a single site four electron process through the reaction path of I (O<inf>2</inf> → O<inf>2</inf>* → OOH* → O* → OH* → H<inf>2</inf>O) except for the catalyst of FeN<inf>4</inf>-CNT. The rate-determining step (RDS) for ORR process on FeN<inf>4</inf>B2-G is the first reduction step (O<inf>2</inf>* → OOH*), while the RDS is the fourth reduction step (OH* → H<inf>2</inf>O) for the other catalysts. FeN<inf>4</inf>B2-G exhibits the largest on-set potentials of 0.53 V, which is larger than the on-set potential of un-doped B FeN<inf>4</inf>-G catalyst (0.39 V). In addition, the B-doped FeN<inf>4</inf>-CNT catalyst shows the better activity compared to the un-doped ones. © 2021 John Wiley & Sons Ltd",B-doped Fe-N-C catalysts; on-set potential; ORR mechanisms; RDS,Carbon nanotubes; Density functional theory; Electrolytic reduction; Graphene; Hydrogen peroxide; Iron compounds; Oxygen; Oxygen reduction reaction; Proton exchange membrane fuel cells (PEMFC); Adsorption energies; Electrostatic potential surface; Four-electron process; Mulliken charges; Oxygen reduction process; Rate-determining step; Reaction paths; Single sites; Catalyst activity,B-doped Fe-N-C catalysts;on-set potential;ORR mechanisms;RDS;Carbon nanotubes;Density functional theory;Electrolytic reduction;Graphene;Hydrogen peroxide;Iron compounds;Oxygen;Oxygen reduction reaction;Proton exchange membrane fuel cells (PEMFC);Adsorption energies;Electrostatic potential surface;Four-electron process;Mulliken charges;Oxygen reduction process;Rate-determining step;Reaction paths;Single sites;Catalyst activity,"J. Niu; School of Energy and Power Engineering, Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education of PRC, Chongqing University, Chongqing, China; email: juntianniu@cqu.edu.cn; W. Qi; School of Vehicle Engineering, Key Laboratory of Advanced Manufacturing Technology for Automobile Parts, Ministry of Education, Chongqing University of Technology, Chongqing, China; email: wenjieqi@cqut.edu.cn",,,,,,John Wiley and Sons Ltd,0363907X,,IJERD,,English,Int. J. Energy Res.,Article,Scopus,,2-s2.0-85099236860,,China,cqu.edu.cn,,,"Niu, J.; Qi, W.; Li, C.; Mao, M.; Zhang, Z.; Chen, Y.; Li, W.; Ge, S."
"Li, B.Y., Holby, E.F., Wang, G.F.","Mechanistic insights into metal, nitrogen doped carbon catalysts for oxygen reduction: progress in computational modeling",2022,JOURNAL OF MATERIALS CHEMISTRY A,10,45,,23959,23972,14,11,10.1039/d2ta05991f,,"[Li, Boyang; Wang, Guofeng] Univ Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15261 USA; [Holby, Edward F.] Los Alamos Natl Lab, Sigma Div, Los Alamos, NM 87545 USA",,"Metal and nitrogen doped carbon materials (denoted as M-N-C) synthesized through high-temperature pyrolysis have been found to exhibit activity for oxygen reduction reaction (ORR) approaching that of Pt and electrochemical stability higher than previous MN4-containing macrocyclic molecular catalysts. Tremendous efforts have thus been devoted to the advancement of M-N-C catalysts as an economical alternative to Pt-based catalysts for proton exchange membrane fuel cell cathodes with a focus on simultaneously improving activity and stability. To this end, novel computational modeling techniques have been developed and applied to acquire knowledge crucial for accelerating the pace of M-N-C catalyst development. In this review, recent progress in computational method development, as well as the predictions of chemical structure of active sites, reaction pathways, ORR kinetics, and catalyst stability in electrochemical environments, are critically surveyed. Moreover, the crucial role of computational modeling to elucidate the functional mechanism of M-N-C catalysts for ORR in acid media and enable rational design of M-N-C catalysts is discussed with a visionary outlook for the field.",,DENSITY-FUNCTIONAL THEORY; FREE-ENERGY BARRIERS; FUEL-CELL CATHODES; N-C CATALYSTS; ACTIVE-SITES; ELECTROCHEMICAL REDUCTION; MACROCYCLIC COMPLEXES; IRON; PERFORMANCE; ELECTROCATALYSTS,DENSITY-FUNCTIONAL THEORY;FREE-ENERGY BARRIERS;FUEL-CELL CATHODES;N-C CATALYSTS;ACTIVE-SITES;ELECTROCHEMICAL REDUCTION;MACROCYCLIC COMPLEXES;IRON;PERFORMANCE;ELECTROCATALYSTS,guw8@pitt.edu,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Review,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000883077700001,2-s2.0-85142488892,United States,pitt.edu,Univ Pittsburgh;Los Alamos Natl Lab,"Univ Pittsburgh, United States;Los Alamos Natl Lab, United States","Li, Boyang; Holby, Edward F.; Wang, Guofeng"
"Yu, Y., Wang, Y., Yang, F., Feng, D., Yang, M., Xie, P.F., Zhu, Y., Shao, M., Mei, Y., Li, J.C.",Meso/Microporous Single-Atom Catalysts Featuring Curved Fe−N4 Sites Boost the Oxygen Reduction Reaction Activity,2025,Angewandte Chemie - International Edition,64,3,e202415691,,,,68,10.1002/anie.202415691,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85210412407&doi=10.1002%2Fanie.202415691&partnerID=40&md5=c574ef2a01522cc04a83f1e97d6b5929,"Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China; Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Energy Institute, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, Guangdong, China","Yu, Ying, Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China; Wang, Yian, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Yang, Fei, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Feng, Dong, Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China; Yang, Mingyang, Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China; Xie, Pengfei, Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China; Zhu, Yuanzhi, Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China; Shao, Minhua, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Energy Institute, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, Guangdong, China; Mei, Yi, Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China; Li, Jincheng, Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China","Zeolitic-imidazolate frameworks (ZIFs) are among the most efficient precursors for the synthesis of atomically dispersed Fe−N/C materials, which are promising catalysts for enhancing the performance of Zn-air batteries (ZABs) and proton exchange fuel cells (PEMFCs). However, existing ZIF-derived Fe−N/C electrocatalysts mostly consist of microporous materials, leading to insufficient mass transport and inadequate battery/cell performance. In this study, we synthesize an atomically dispersed meso/microporous Fe−N/C material with curved Fe−N<inf>4</inf> active sites, denoted as FeSA−N/TC, through the pyrolysis of hemin-modified ZIF films on ZnO nanorods, obtained from the self-assembly reaction between Zn2+ from ZnO hydrolysis and 2-methylimidazole. Density functional theory calculations demonstrate that the curved Fe−N<inf>4</inf> active sites can weaken the intermediate adsorptions, resulting in lower free energy barriers and enhanced performance during oxygen reduction reaction (ORR). Specifically, FeSA−N/TC exhibits exceptional ORR performance with half-wave potentials of 0.925 V in alkaline media and 0.825 V in acidic media. When used as the cathodic catalyst in PEMFCs and ZABs, FeSA−N/TC achieves high peak power densities (H<inf>2</inf>−O<inf>2</inf> PEMFC: 1100 mW cm−2; H<inf>2</inf>−Air PEMFC: 715 mW cm−2; liquid-state ZAB: 228 mW cm−2; solid-state ZAB: 112 mW cm−2), demonstrating its feasibility and efficiency in practical applications. © 2025 Wiley-VCH GmbH.",fuel cell; meso/microporous Fe−N/C; oxygen reduction; Zn-air battery; ZnO templated ZIF,Bioremediation; Crystallites; Electrolytic reduction; Layered semiconductors; Micropores; Microporous materials; Nanorods; Oxygen reduction reaction; Rate constants; Reaction intermediates; Solid-State Batteries; Zinc air batteries; Zinc alloys; Meso/microporous fe−N/C; Microporous; Oxygen Reduction; P.E.M.F.C; Templated; Zeolitic imidazolate frameworks; ZnO; ZnO templated zeolitic-imidazolate framework; ]+ catalyst; Self assembly; hemin; nanorod; oxygen; proton; zinc ion; adsorption; article; atom; catalyst; controlled study; density functional theory; fuel; hydrolysis; liquid; pyrolysis; solid state; synthesis,fuel cell;meso/microporous Fe−N/C;oxygen reduction;Zn-air battery;ZnO templated ZIF;Bioremediation;Crystallites;Electrolytic reduction;Layered semiconductors;Micropores;Microporous materials;Nanorods;Oxygen reduction reaction;Rate constants;Reaction intermediates;Solid-State Batteries;Zinc air batteries;Zinc alloys;Microporous;P.E.M.F.C;Templated;Zeolitic imidazolate frameworks;ZnO;ZnO templated zeolitic-imidazolate framework;]+ catalyst;Self assembly;hemin;nanorod;oxygen;proton;zinc ion;adsorption;article;atom;catalyst;controlled study;density functional theory;fuel;hydrolysis;liquid;pyrolysis;solid state;synthesis,"D. Feng; Faculty of Chemical Engineering, Yunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New Phosphorus Materials, Kunming University of Science and Technology, Kunming, 650500, China; email: fdryan@kust.edu.cn; J.-C. Li; Faculty of Chemical Engineering, Yunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New Phosphorus Materials, Kunming University of Science and Technology, Kunming, 650500, China; email: jinchengli@kust.edu.cn; M. Shao; Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology Clear Water Bay, Kowloon, Hong Kong; email: kemshao@ust.hk",,,,,,John Wiley and Sons Inc,14337851,,ACIEF,39375149,English,Angew. Chem. Int. Ed.,Article,Scopus,,2-s2.0-85210412407,,China;Hong Kong,kust.edu.cn,,,"Yu, Y.; Wang, Y.; Yang, F.; Feng, D.; Yang, M.; Xie, P.-F.; Zhu, Y.; Shao, M.; Mei, Y.; Li, J.-C."
"Nie, Y., Li, Q.Y., Jia, C., Zheng, X.R., Shi, Z., Wang, S.H., Meyer, Q., Li, X.H., Zhao, C.",Mesoporous Co-N-C Supported L10-PtCo Alloy Enables Fast Mass Transport for Proton Exchange Membrane Fuel Cells,2025,SMALL,21,41,e05914,,,7,1,10.1002/smll.202505914,,"[Nie, Yan; Jia, Chen; Shi, Zhun; Wang, Shuhao; Meyer, Quentin; Zhao, Chuan] Univ New South Wales, Sch Chem, Sydney 2052, Australia; [Li, Qiyuan; Li, Xin-hao] Shanghai Jiao Tong Univ, Frontiers Sci Ctr Transformat Mol, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China; [Zheng, Xiaoran] UNSW Sydney, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia",,"Oxygen reduction reaction (ORR) performance of platinum can be improved through alloying transition metals, with L10-PtCo emerging as a standout option due to its balanced catalytic performance, durability, and manufacturability. However, traditional carbon supports often fail to stabilize nanoparticles, leading to performance degradation. This study introduces a mesoporous Co-N-C supported ordered L10-PtCo catalyst to overcome the above limitations. The CoN4 sites in the mesoporous Co-N-C (MS-CoNC) support create a strong synergy with L10-PtCo clusters, preventing nanoparticle aggregation during high-temperature synthesis. X-ray absorption spectroscopy reveals a unique shortened Pt-Pt bond length in L10-PtCo/MS-CoNC, which contributes to a mass activity of 0.54 A mg-1, 6.3 times that of commercial carbon-supported PtCo catalysts. Rationalised by density functional theory, L10-PtCo/MS-CoNC optimizes its d-band centre for enhancing ORR intermediate adsorption-desorption. Membrane electrode assemblies test deliver remarkably improved peak power density while with only 60 mu gPt cm-2 of Pt. The mesoporous structure of the Co-N-C support further reduces mass transport losses, enhancing oxygen diffusion and stability. Durability testing shows minimal performance loss after 30 000 voltage cycles, showcasing the catalyst's robustness under harsh PEMFC conditions. This work demonstrates the synergistic advantages of mesoporous Co-N-C supports and L10-PtCo catalysts, paving the way for high-performance, low-Pt fuel cell technologies.",intermetallic compounds; oxygen reduction reaction; proton exchange membrane fuel cell; single-atom catalysts,PERFORMANCE,intermetallic compounds;oxygen reduction reaction;proton exchange membrane fuel cell;single-atom catalysts;PERFORMANCE,q.meyer@unsw.edu.au; xinhaoli@sjtu.edu.cn; chuan.zhao@unsw.edu.au,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1613-6810,,,40891091,English,SMALL,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:001563072800001,2-s2.0-105014886585,Australia;China,unsw.edu.au,Univ New South Wales;Shanghai Jiao Tong Univ;UNSW Sydney,"Univ New South Wales, Australia;Shanghai Jiao Tong Univ, China;UNSW Sydney, Australia","Nie, Yan; Li, Qiyuan; Jia, Chen; Zheng, Xiaoran; Shi, Zhun; Wang, Shuhao; Meyer, Quentin; Li, Xin-hao; Zhao, Chuan"
"Niu, W., Li, L., Liu, X., Wang, N., Liu, J., Zhou, W., Tang, Z., Chen, S.",Mesoporous N-doped carbons prepared with thermally removable nanoparticle templates: An efficient electrocatalyst for oxygen reduction reaction,2015,Journal of the American Chemical Society,137,16,,5555,5562,,659,10.1021/jacs.5b02027,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84928802836&doi=10.1021%2Fjacs.5b02027&partnerID=40&md5=6d955a79da2cb36cbe34eb84a9e13835,"New Energy Research Institute, South China University of Technology, Guangzhou, Guangdong, China; University of California, Santa Cruz, Santa Cruz, CA, United States","Niu, Wenhan, New Energy Research Institute, South China University of Technology, Guangzhou, Guangdong, China; Li, Ligui, New Energy Research Institute, South China University of Technology, Guangzhou, Guangdong, China; Liu, Xiaojun, New Energy Research Institute, South China University of Technology, Guangzhou, Guangdong, China; Wang, Nan, New Energy Research Institute, South China University of Technology, Guangzhou, Guangdong, China; Liu, Ji, New Energy Research Institute, South China University of Technology, Guangzhou, Guangdong, China; Zhou, Weijia, New Energy Research Institute, South China University of Technology, Guangzhou, Guangdong, China; Tang, Zhenghua, New Energy Research Institute, South China University of Technology, Guangzhou, Guangdong, China; Chen, Shaowei, New Energy Research Institute, South China University of Technology, Guangzhou, Guangdong, China, University of California, Santa Cruz, Santa Cruz, CA, United States","Thermally removable nanoparticle templates were used for the fabrication of self-supported N-doped mesoporous carbons with a trace amount of Fe (Fe-N/C). Experimentally Fe-N/C was prepared by pyrolysis of poly(2-fluoroaniline) (P2FANI) containing a number of FeO(OH) nanorods that were prepared by a one-pot hydrothermal synthesis and homogeneously distributed within the polymer matrix. The FeO(OH) nanocrystals acted as rigid templates to prevent the collapse of P2FANI during the carbonization process, where a mesoporous skeleton was formed with a medium surface area of about 400 m2/g. Subsequent thermal treatments at elevated temperatures led to the decomposition and evaporation of the FeO(OH) nanocrystals and the formation of mesoporous carbons with the surface area markedly enhanced to 934.8 m2/g. Electrochemical measurements revealed that the resulting mesoporous carbons exhibited apparent electrocatalytic activity for oxygen reduction reactions (ORR), and the one prepared at 800 °C (Fe-N/C-800) was the best among the series, with a more positive onset potential (+0.98 V vs RHE), higher diffusion-limited current, higher selectivity (number of electron transfer n > 3.95 at +0.75 V vs RHE), much higher stability, and stronger tolerance against methanol crossover than commercial Pt/C catalysts in a 0.1 M KOH solution. The remarkable ORR performance was attributed to the high surface area and sufficient exposure of electrocatalytically active sites that arose primarily from N-doped carbons with minor contributions from Fe-containing species. © 2015 American Chemical Society.",,Carbonization; Catalyst selectivity; Electrocatalysis; Electrocatalysts; Electrolytic reduction; Hydrothermal synthesis; Iron oxides; Mesoporous materials; Nanocrystals; Nanoparticles; Nanorods; Oxygen; Reduction; Synthesis (chemical); Carbonization process; Diffusion-limited current; Electrocatalyst for oxygen reduction reactions; Electrocatalytic activity; Electrochemical measurements; N-doped mesoporous carbons; One-pot hydrothermal synthesis; Oxygen reduction reaction; Doping (additives); carbon; iron; nanocrystal; nanoparticle; nitrogen; oxygen; silver; aqueous solution; Article; catalyst; chemical reaction; electrocatalyst; electrode; energy resource; glassy carbon electrode; measurement; oxygen reduction reaction; proton exchange membrane fuel cell; scanning electron microscopy; temperature; thermogravimetry; transmission electron microscopy; X ray photoelectron spectroscopy; X ray powder diffraction,Carbonization;Catalyst selectivity;Electrocatalysis;Electrocatalysts;Electrolytic reduction;Hydrothermal synthesis;Iron oxides;Mesoporous materials;Nanocrystals;Nanoparticles;Nanorods;Oxygen;Reduction;Synthesis (chemical);Carbonization process;Diffusion-limited current;Electrocatalyst for oxygen reduction reactions;Electrocatalytic activity;Electrochemical measurements;N-doped mesoporous carbons;One-pot hydrothermal synthesis;Oxygen reduction reaction;Doping (additives);carbon;iron;nanocrystal;nanoparticle;nitrogen;silver;aqueous solution;Article;catalyst;chemical reaction;electrocatalyst;electrode;energy resource;glassy carbon electrode;measurement;proton exchange membrane fuel cell;scanning electron microscopy;temperature;thermogravimetry;transmission electron microscopy;X ray photoelectron spectroscopy;X ray powder diffraction,,,,,,,American Chemical Society service@acs.org,00027863,,JACSA,,English,J. Am. Chem. Soc.,Article,Scopus,,2-s2.0-84928802836,,China;United States,No email,,,"Niu, W.; Li, L.; Liu, X.; Wang, N.; Liu, J.; Zhou, W.; Tang, Z.; Chen, S."
"Lee, Y., Kwak, S.H., Kim, S., Son, H.J., Kim, J.Y., Kim, H.Y., Joo, S.H.",Mesoporous Silica-Stabilized Ceria Antioxidants for Enhancing PEMFC Durability,2025,CHEMELECTROCHEM,12,12,,,,9,2,10.1002/celc.202500056,,"[Lee, Yeongseop; Son, Hae Jung] Korea Inst Sci & Technol KIST, Adv Photovolta Res Ctr, Seoul 02792, South Korea; [Lee, Yeongseop; Son, Hae Jung] Korea Univ, Grad Sch Energy & Environm, KU KIST Green Sch, Dept Energy Environm Policy & Technol, Seoul 02841, South Korea; [Lee, Yeongseop; Kwak, Seong Hoon; Joo, Sang Hoon] Seoul Natl Univ, Dept Chem, Seoul 08826, South Korea; [Kim, Sangwon] Saarland Univ, Korea Inst Sci & Technol KIST, Europe & Transferctr Sustainable Electrochem, D-66041 Saarbrucken, Germany; [Son, Hae Jung; Kim, Jin Young] Korea Natl Univ Sci & Technol UST, KIST Sch, Div Energy & Environm Technol, Seoul 02792, South Korea; [Kim, Jin Young] KIST, Hydrogen Fuel Cell Res Ctr, Seoul 02792, South Korea; [Kim, Ho Young] Sangmyung Univ, Dept Chem & Energy Engn, Seoul 03016, South Korea",,"Enhancing the durability of polymer electrolyte membrane fuel cells (PEMFCs) is critical for advancing a hydrogen-powered clean energy future. A major obstacle to improving PEMFC durability is reactive oxygen species (ROS) that deteriorate PEMFC performance by oxidizing membrane electrode assembly (MEA). While CeOx-based nanomaterials are widely used as antioxidants, they often undergo decline in efficacy by their nanostructure deformation, hampering stable PEMFC operation. Here, mesoporous silica nanoparticles (MSNs) are reported as a stabilizer for antioxidants, effectively alleviating the CeOx disintegration. MSNs facilitate the formation of uniformly dispersed CeOx nanoparticles smaller than 2 nm having abundant oxygen vacancies and high proportion of Ce(III) oxidation states. The well-defined mesoporous structure of MSNs effectively confines CeOx in the internal voids and prevents CeOx agglomeration, thereby exhibiting sustained antioxidation efficacy within the Pt/C-based electrodes. Importantly, CeOx/MSN mitigates the MEA degradation, retaining 95% of PEMFC performance even after 100 h durability tests under the ROS-rich environment.",antioxidants; ceria; membrane electrode assemblies; mesoporous silica; polymer electrolyte membrane fuel cells,FE-N/C ELECTROCATALYSTS; FUEL-CELLS; MEMBRANE; HYDROGEN; NANOPARTICLES; PLATINUM; SITES; REACTIVITY; OXIDATION; CATALYSTS,antioxidants;ceria;membrane electrode assemblies;mesoporous silica;polymer electrolyte membrane fuel cells;FE-N/C ELECTROCATALYSTS;FUEL-CELLS;MEMBRANE;HYDROGEN;NANOPARTICLES;PLATINUM;SITES;REACTIVITY;OXIDATION;CATALYSTS,hjson@kist.re.kr; jinykim@kist.re.kr; hoykim@smu.ac.kr; shjoo1@snu.ac.kr,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,2196-0216,,,,English,CHEMELECTROCHEM,Article,WoS,Electrochemistry,WOS:001461115100001,,South Korea;Germany,kist.re.kr,Korea Inst Sci & Technol KIST;Korea Univ;Seoul Natl Univ;Saarland Univ;Korea Natl Univ Sci & Technol UST;KIST;Sangmyung Univ,"Korea Inst Sci & Technol KIST, South Korea;Korea Univ, South Korea;Seoul Natl Univ, South Korea;Saarland Univ, Germany;Korea Natl Univ Sci & Technol UST, South Korea;KIST, South Korea;Sangmyung Univ, South Korea","Lee, Yeongseop; Kwak, Seong Hoon; Kim, Sangwon; Son, Hae Jung; Kim, Jin Young; Kim, Ho Young; Joo, Sang Hoon"
"Akula, S., Mooste, M., Zulevi, B., McKinney, S., Kikas, A., Piirsoo, H.M., Rahn, M., Tamm, A., Kisand, V., Serov, A., Creel, E.B., Cullen, D.A., Neyerlin, K.C., Wang, H., Odgaard, M., Reshetenko, T., Tammeveski, K.",Mesoporous textured Fe-N-C electrocatalysts as highly efficient cathodes for proton exchange membrane fuel cells,2022,JOURNAL OF POWER SOURCES,520,,230819,,,11,70,10.1016/j.jpowsour.2021.230819,,"[Akula, Srinu; Mooste, Marek; Tammeveski, Kaido] Univ Tartu, Inst Chem, Ravila 14a, EE-50411 Tartu, Estonia; [Zulevi, Barr; McKinney, Sam] Pajarito Powder LLC, 3600 Osuna Rd NE Ste 309, Albuquerque, NM 87109 USA; [Kikas, Arvo; Piirsoo, Helle-Mai; Rahn, Mihkel; Tamm, Aile; Kisand, Vambola] Univ Tartu, Inst Phys, W Ostwald Str 1, EE-50411 Tartu, Estonia; [Serov, Alexey; Creel, Erin B.] Oak Ridge Natl Lab, Electrificat & Energy Infrastruct Div, Oak Ridge, TN 37830 USA; [Neyerlin, Kenneth C.; Wang, Hao] Natl Renewable Energy Lab, Chem & Nanosci Ctr, Golden, CO 80401 USA; [Odgaard, Madeleine] IRD Fuel Cells LLC, 8500 Washington St NE, Albuquerque, NM 87113 USA; [Reshetenko, Tatyana] Univ Hawaii, Hawaii Nat Energy Inst, Honolulu, HI 96822 USA; [Cullen, David A.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA",,"A new platinum group metal (PGM)-free proton exchange membrane fuel cell (PEMFC) cathode catalyst materials, synthesized using the VariPore (TM) method by Pajarito Powder, LLC, are characterized for their structure and activity. The physico-chemical analysis of the iron-nitrogen-carbon (Fe-N-C) electrocatalysts show mesoporous carbon material effectively doped with iron and nitrogen. The materials have an average pore size of 78 nm and high specific surface area. The Fe-N-C catalysts exhibit good oxygen reduction reaction (ORR) activity in 0.5 M H2SO4 electrolyte with high half-wave potential and sustainable electrochemical stability over 10,000 repeated potential cycles with insignificant losses in their activities. As cathode catalysts in a PEMFC, the Fe-N-C materials deliver remarkably good fuel cell performance at low overpotential approaching that of the commercial Pt catalyst. The high ORR electrocatalytic activity of these Fe-N-C catalysts is credited to the synergy between nitrogen-moieties, specifically pyrrolic-N, pyridinic-N, and graphitic-N, and iron in addition to the high mesoporosity that facilitate an effective reaction path in boosting the electrocatalytic activity and stability.",Electrocatalysis; Fe-N-C catalyst; Mesoporous carbon; Nitrogen doping; Oxygen reduction reaction; Proton-exchange membrane fuel cell,OXYGEN REDUCTION CATALYST; SINGLE-ATOM CATALYSTS; DOPED CARBON; IRON; SITES; ALKALINE,Electrocatalysis;Fe-N-C catalyst;Mesoporous carbon;Nitrogen doping;Oxygen reduction reaction;Proton-exchange membrane fuel cell;OXYGEN REDUCTION CATALYST;SINGLE-ATOM CATALYSTS;DOPED CARBON;IRON;SITES;ALKALINE,serova@ornl.gov; kaido.tammeveski@ut.ee,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:000742840500002,2-s2.0-85119967069,Estonia;United States,ornl.gov,Univ Tartu;Pajarito Powder LLC;Oak Ridge Natl Lab;Natl Renewable Energy Lab;IRD Fuel Cells LLC;Univ Hawaii,"Univ Tartu, Estonia;Pajarito Powder LLC, United States;Oak Ridge Natl Lab, United States;Natl Renewable Energy Lab, United States;IRD Fuel Cells LLC, United States;Univ Hawaii, United States","Akula, Srinu; Mooste, Marek; Zulevi, Barr; McKinney, Sam; Kikas, Arvo; Piirsoo, Helle-Mai; Rahn, Mihkel; Tamm, Aile; Kisand, Vambola; Serov, Alexey; Creel, Erin B.; Cullen, David A.; Neyerlin, Kenneth C.; Wang, Hao; Odgaard, Madeleine; Reshetenko, Tatyana; Tammeveski, Kaido"
"Tolosana-Moranchel, A., Garcia, A., Garcia-Corral, A., Marco, J.F., Pascual, L., Liuzzi, D., Abdel Salam, M.A., Ferrer, P., Torrero, J., Grinter, D.C., Held, G., Garcia-Sanchez, D., Friedrich, K.A., Retuerto, M., Rojas, S.",Metal-doped imine frameworks for the oxygen reduction reaction in acidic media,2023,Journal of Power Sources,578,,233223,,,,8,10.1016/j.jpowsour.2023.233223,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85161314757&doi=10.1016%2Fj.jpowsour.2023.233223&partnerID=40&md5=8373030fe910b6b38601ff478628b8d1,"Grupo de Energía y Química Sostenibles, CSIC - Instituto de Catálisis y Petroleoquímica (ICP), Madrid, Madrid, Spain; Dept. Fisica Matematica y de Fluidos, Universidad Nacional de Educacion a Distancia, Madrid, Spain; Institute of Engineering Thermodynamics/Electrochemical Energy Technology, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany; CSIC - Instituto de Quimica Fisica Rocasolano (IQFR), Madrid, Madrid, Spain; CSIC - Instituto de Catálisis y Petroleoquímica (ICP), Madrid, Madrid, Spain; Department of Chemistry, Faculty of Sciences, King Abdulaziz University, Jeddah, Makkah Province, Saudi Arabia; Diamond Light Source, Didcot, Oxfordshire, United Kingdom; Institute of Energy Storage, Universität Stuttgart, Stuttgart, Baden-Wurttemberg, Germany","Tolosana-Moranchel, Alvaro, Grupo de Energía y Química Sostenibles, CSIC - Instituto de Catálisis y Petroleoquímica (ICP), Madrid, Madrid, Spain; García, Álvaro, Grupo de Energía y Química Sostenibles, CSIC - Instituto de Catálisis y Petroleoquímica (ICP), Madrid, Madrid, Spain; García-Corral, Álvaro, Dept. Fisica Matematica y de Fluidos, Universidad Nacional de Educacion a Distancia, Madrid, Spain, Institute of Engineering Thermodynamics/Electrochemical Energy Technology, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany; Marco, J. F., CSIC - Instituto de Quimica Fisica Rocasolano (IQFR), Madrid, Madrid, Spain; Pascual, Laura, CSIC - Instituto de Catálisis y Petroleoquímica (ICP), Madrid, Madrid, Spain; Liuzzi, Dalia, Grupo de Energía y Química Sostenibles, CSIC - Instituto de Catálisis y Petroleoquímica (ICP), Madrid, Madrid, Spain; Abdel Salam, Mohamed, Department of Chemistry, Faculty of Sciences, King Abdulaziz University, Jeddah, Makkah Province, Saudi Arabia; Ferrer, Pilar, Diamond Light Source, Didcot, Oxfordshire, United Kingdom; Torrero, Jorge, Institute of Engineering Thermodynamics/Electrochemical Energy Technology, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany; Grinter, David C., Diamond Light Source, Didcot, Oxfordshire, United Kingdom; Held, Georg, Diamond Light Source, Didcot, Oxfordshire, United Kingdom; Garcia-Sanchez, Daniel, Institute of Engineering Thermodynamics/Electrochemical Energy Technology, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany; Friedrich, K. Andreas, Institute of Engineering Thermodynamics/Electrochemical Energy Technology, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Koln, Nordrhein-Westfalen, Germany, Institute of Energy Storage, Universität Stuttgart, Stuttgart, Baden-Wurttemberg, Germany; Retuerto, María, Grupo de Energía y Química Sostenibles, CSIC - Instituto de Catálisis y Petroleoquímica (ICP), Madrid, Madrid, Spain; Rojas, S., Grupo de Energía y Química Sostenibles, CSIC - Instituto de Catálisis y Petroleoquímica (ICP), Madrid, Madrid, Spain","The overall performance of proton exchange membrane fuel cells is limited by the sluggish kinetics of the oxygen-reduction reaction (ORR). Among the most active PGM-free ORR electrocatalysts are metal-nitrogen-carbon (M-N-C), such as Fe–N–C. The Fe–N<inf>4</inf> ensembles in these PGM-free catalysts, present in different configurations, are proposed to be the active sites for the ORR in acid. In this work, we have synthesized a Fe/N/C catalyst via thermal treatment of a polymeric C<inf>x</inf>N<inf>y</inf> precursor obtained by the wet-polymerization of melamine (a nitrogen rich molecule) and terephthaldehyde. The materials obtained (Im-FeNC-1HT and Im-FeNC-2HT) display high ORR activity in acid electrolyte compared to other Fe–N–C catalysts prepared with precursors different than 2-methylimidazole or ZIF-8. Characterization data indicate the formation of high- and low-spin Fe-N<inf>x</inf> ensembles, with a site density of 4.4·1019 sites<inf>Fe</inf>·g−1 estimated by electrochemical stripping of NO. The ORR activity was evaluated in a RRDE configuration in 0.1 M HClO<inf>4</inf> and in MEA configuration in a single cell. © 2023 The Authors",,Catalyst activity; Chlorine compounds; Electrocatalysts; Electrolytic reduction; Iron compounds; More electric aircraft; Nitrogen; Oxygen; Proton exchange membrane fuel cells (PEMFC); Reaction kinetics; Synthesis (chemical); Acidic media; Cell-be; Cell/B.E; Cell/BE; Metal-doped; Oxygen reduction reaction; Performance; Proton-exchange membranes fuel cells; Reaction activity; ]+ catalyst; Electrolytes,Catalyst activity;Chlorine compounds;Electrocatalysts;Electrolytic reduction;Iron compounds;More electric aircraft;Nitrogen;Oxygen;Proton exchange membrane fuel cells (PEMFC);Reaction kinetics;Synthesis (chemical);Acidic media;Cell-be;Cell/B.E;Cell/BE;Metal-doped;Oxygen reduction reaction;Performance;Proton-exchange membranes fuel cells;Reaction activity;]+ catalyst;Electrolytes,"S. Rojas; Grupo de Energía y Química Sostenibles, Instituto de Catálisis y Petroleoquímica, Madrid, CSIC. Marie Curie 2, 28049, Spain; email: srojas@icp.csic.es; Á. Tolosana-Moranchel; Grupo de Energía y Química Sostenibles, Instituto de Catálisis y Petroleoquímica, Madrid, CSIC. Marie Curie 2, 28049, Spain; email: alvaro.tolosana@csic.es",,,,,,Elsevier B.V.,03787753,0444894810,JPSOD,,English,J Power Sources,Article,Scopus,,2-s2.0-85161314757,,Spain;Germany;Saudi Arabia;United Kingdom,icp.csic.es,,,"Tolosana-Moranchel, A.; Garcia, A.; Garcia-Corral, A.; Marco, J.F.; Pascual, L.; Liuzzi, D.; Abdel Salam, M.A.; Ferrer, P.; Torrero, J.; Grinter, D.C.; Held, G.; Garcia-Sanchez, D.; Friedrich, K.A.; Retuerto, M.; Rojas, S."
"He, Y.H., Tan, Q., Lu, L.L., Sokolowski, J., Wu, G.",Metal-Nitrogen-Carbon Catalysts for Oxygen Reduction in PEM Fuel Cells: Self-Template Synthesis Approach to Enhancing Catalytic Activity and Stability,2019,ELECTROCHEMICAL ENERGY REVIEWS,2,2,,231,251,21,176,10.1007/s41918-019-00031-9,,"[He, Yanghua; Tan, Qiang; Lu, Leilei; Sokolowski, Joshua; Wu, Gang] SUNY Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA",,"Proton exchange membrane fuel cells (PEMFCs) are leading candidates in the utilization of clean energy resources for application in transportation, stationary, and portable devices. In PEMFCs, cathode catalysts are crucial for overall performance and durability due to kinetically slow oxygen reduction reactions (ORR). Because platinum (Pt), a state-of-the-art ORR catalyst, is rare and expensive, the development of high-performance platinum metal group (PGM)-free catalysts is highly desirable for future fuel cell technologies. Among the various PGM-free catalyst formulations, metal and nitrogen co-doped carbon (M-N-C, M: Fe, Co, or Mn) catalysts have exhibited encouraging activity and stability in acidic media for ORR and possess great potential to replace Pt in the future. Therefore, based on our extensive experience in the field of ORR catalysis, this review will comprehensively summarize the basic principles in the design and synthesis of M-N-C catalysts for durable, inexpensive, and high-performance PEMFCs with an emphasis on Co- and Mn-N-C catalysts to avoid Fenton reactions between Fe2+ and H2O2, which can generate free radicals and lead to the degradation of catalysts, ionomers, and membranes in PEMFCs. Furthermore, template-free 3D hydrocarbon frameworks as attractive precursors to advanced M-N-C catalysts will be discussed to significantly enhance intrinsic ORR activities in acidic media. In addition, long-term performance durability of M-N-C cathodes will be discussed extensively to provide potential solutions to enhance catalyst stability in PEMFCs. Finally, this review will provide an overall perspective on the progress, challenges, and solutions of PGM-free catalysts for future PEMFC technologies.Graphical Abstract",Oxygen reduction; PGM-free catalysts; Electrocatalysis; Fuel cells; Energy conversion,,Oxygen reduction;PGM-free catalysts;Electrocatalysis;Fuel cells;Energy conversion,gangwu@buffalo.edu,,"CAMPUS, 4 CRINAN ST, LONDON, N1 9XW, ENGLAND",,,,SPRINGERNATURE,2520-8489,,,,English,ELECTROCHEM ENERGY R,Review,WoS,Electrochemistry,WOS:000606752000002,2-s2.0-85068168190,United States,buffalo.edu,SUNY Buffalo,"SUNY Buffalo, United States","He, Yanghua; Tan, Qiang; Lu, Leilei; Sokolowski, Joshua; Wu, Gang"
"Wang, S., Chu, Y., Lan, C., Liu, C., Ge, J., Xing, W.","Metal-nitrogen-carbon catalysts towards acidic ORR in PEMFC: fundamentals, durability challenges, and improvement strategies",2023,Chemical Synthesis,3,2,15,,,,20,10.20517/cs.2022.36,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85178336883&doi=10.20517%2Fcs.2022.36&partnerID=40&md5=7b4f155213b0ec366de6a6ef5691a0a9,"Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China","Wang, Shuo, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Chu, Yuyi, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Lan, Chang, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Liu, Changpeng, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Ge, Junjie, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Xing, Wei, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China","Metal-Nitrogen-Carbon (M-N-C) materials are the most promising Platinum-group-metal (PGM)-free catalysts in replacing the high-cost and scarce Pt catalysts in proton exchange membrane fuel cells (PEMFCs). However, while striking improvement of M-N-C catalysts has been reached in activity, the headache degradation problems hinder their real-world application. Herein, we present a comprehensive overview of the durability of the M-N-C catalyst for oxygen reaction reduction (ORR). The fundamental understanding and identification of the ORR performance of M-N-C catalysts are discussed. Meanwhile, the standard methods to evaluate and predict the ORR performance of the PGM-free catalysts are suggested. We mainly introduce the durability challenges of the M-N-C catalyst and explain the inactivation mechanism in detail. The proposed solution and useful strategies to alleviate catalyst degradation are systematically summarized to overcome the durability bottlenecks. © The Author(s) 2023.",active site; Durability improvement; M-N-C catalysts; ORR,,active site;Durability improvement;M-N-C catalysts;ORR,"C. Liu; Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China; email: luichp@ciac.ac.cn; J. Ge; Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China; email: gejj@ciac.ac.cn; W. Xing; Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China; email: xingwei@ciac.ac.cn",,,,,,OAE Publishing Inc.,,,,,English,Chem. Synth.,Review,Scopus,,2-s2.0-85178336883,,China,ciac.ac.cn,,,"Wang, S.; Chu, Y.; Lan, C.; Liu, C.; Ge, J.; Xing, W."
"Cho, S., He, C., Sankarasubramanian, S., Singh Thind, A., Parrondo, J., Hachtel, J.A., Borisevich, A.Y., Idrobo, J.C., Xie, J., Ramani, V., Mishra, R.",Metal-Nitrogen-Carbon Cluster-Decorated Titanium Carbide is a Durable and Inexpensive Oxygen Reduction Reaction Electrocatalyst,2021,ChemSusChem,14,21,,4680,4689,,2,10.1002/cssc.202101341,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85115315076&doi=10.1002%2Fcssc.202101341&partnerID=40&md5=aeb7803242ab452aaeb90ab690ac4326,"McKelvey School of Engineering, St. Louis, MO, United States; Virtual Engineering Center, Korea Institute of Ceramic Engineering And Technology, Seoul, Guemcheon-Gu, South Korea; Department of Energetics, McKelvey School of Engineering, St. Louis, MO, United States; Institute of Materials Science, Washington University in St. Louis, St. Louis, MO, United States; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States","Cho, Sung-beom, McKelvey School of Engineering, St. Louis, MO, United States, Virtual Engineering Center, Korea Institute of Ceramic Engineering And Technology, Seoul, Guemcheon-Gu, South Korea; He, Cheng, Department of Energetics, McKelvey School of Engineering, St. Louis, MO, United States; Sankarasubramanian, Shrihari, Department of Energetics, McKelvey School of Engineering, St. Louis, MO, United States; Singh Thind, Arashdeep, Institute of Materials Science, Washington University in St. Louis, St. Louis, MO, United States; Parrondo, Javier, Department of Energetics, McKelvey School of Engineering, St. Louis, MO, United States; Hachtel, Jordan Adam, Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Borisevich, Albina Y., Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Idrobo, Juan Carlos, Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Xie, Jing, Department of Energetics, McKelvey School of Engineering, St. Louis, MO, United States; Ramani, Vijay K., Department of Energetics, McKelvey School of Engineering, St. Louis, MO, United States, Institute of Materials Science, Washington University in St. Louis, St. Louis, MO, United States; Mishra, Rohan K., McKelvey School of Engineering, St. Louis, MO, United States, Institute of Materials Science, Washington University in St. Louis, St. Louis, MO, United States","Clusters of nitrogen- and carbon-coordinated transition metals dispersed in a carbon matrix (e. g., Fe−N−C) have emerged as an inexpensive class of electrocatalysts for the oxygen reduction reaction (ORR). Here, it was shown that optimizing the interaction between the nitrogen-coordinated transition metal clusters embedded in a more stable and corrosion-resistant carbide matrix yielded an ORR electrocatalyst with enhanced activity and stability compared to Fe−N−C catalysts. Utilizing first-principles calculations, an electrostatics-based descriptor of catalytic activity was identified, and nitrogen-coordinated iron (FeN<inf>4</inf>) clusters embedded in a TiC matrix were predicted to be an efficient platinum-group metal (PGM)-free ORR electrocatalyst. Guided by theory, selected catalyst formulations were synthesized, and it was demonstrated that the experimentally observed trends in activity fell exactly in line with the descriptor-derived theoretical predictions. The Fe−N−TiC catalyst exhibited enhanced activity (20 %) and durability (3.5-fold improvement) compared to a traditional Fe−N−C catalyst. It was posited that the electrostatics-based descriptor provides a powerful platform for the design of active and stable PGM-free electrocatalysts and heterogenous single-atom catalysts for other electrochemical reactions. © 2021 Wiley-VCH GmbH",Bader charge; electrochemistry; oxidative degradation; oxygen reduction reaction; proton exchange membrane fuel cells,Calculations; Catalyst activity; Coordination reactions; Corrosion resistance; Dissociation; Electrocatalysts; Electrolytic reduction; Iron compounds; Nitrogen; Oxygen; Titanium carbide; Transition metals; A-carbon; Bader charge; Descriptors; matrix; Nitrogen-carbon; Oxidative degradation; Oxygen reduction reaction; Platinum group metals; Proton-exchange membranes fuel cells; ]+ catalyst; Proton exchange membrane fuel cells (PEMFC),Bader charge;electrochemistry;oxidative degradation;oxygen reduction reaction;proton exchange membrane fuel cells;Calculations;Catalyst activity;Coordination reactions;Corrosion resistance;Dissociation;Electrocatalysts;Electrolytic reduction;Iron compounds;Nitrogen;Oxygen;Titanium carbide;Transition metals;A-carbon;Descriptors;matrix;Nitrogen-carbon;Platinum group metals;Proton-exchange membranes fuel cells;]+ catalyst;Proton exchange membrane fuel cells (PEMFC),"R. Mishra; Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, 63130, United States; email: rmishra@wustl.edu; V. Ramani; Department of Energy, Environment and Chemical Engineering, Washington University in St. Louis, St. Louis, 63130, United States; email: ramani@wustl.edu",,,,,,John Wiley and Sons Inc,18645631,,CHEMI,34383996,English,ChemSusChem,Article,Scopus,,2-s2.0-85115315076,,United States;South Korea,wustl.edu,,,"Cho, S.; He, C.; Sankarasubramanian, S.; Singh Thind, A.; Parrondo, J.; Hachtel, J.A.; Borisevich, A.Y.; Idrobo, J.-C.; Xie, J.; Ramani, V.; Mishra, R."
"Liu, Q.M., Li, Q.X., Chen, S.W.",Metal-nitrogen coordination moieties in carbon for effective electrocatalytic reduction of oxygen,2020,CURRENT OPINION IN ELECTROCHEMISTRY,21,,,46,54,9,20,10.1016/j.coelec.2020.01.002,,"[Liu, Qiming; Li, Qiaoxia; Chen, Shaowei] Univ Calif Santa Cruz, Dept Chem & Biochem, 1156 High St, Santa Cruz, CA 95064 USA; [Li, Qiaoxia] Shanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai Key Lab Mat Protect & Adv Mat Elect Powe, 2588 Changyang Rd, Shanghai 200090, Peoples R China",,"Oxygen reduction reaction is a critical process at the cathode of proton-exchange membrane fuel cells and metal-air batteries. Carbon-based single metal atom nanocomposites have emerged as effective alternatives to state-of-the-art platinum catalysts, in which the electrocatalytic activity is attributed largely to the formation of metal-nitrogen coordination moieties (MNx) within the carbon matrix. In this review, we summarize recent progress in the studies of metal and nitrogen codoped carbon as single-atom catalysts toward oxygen reduction reaction within the context of the atomic configuration of the MNx active sites and topologic characteristics of the carbon skeletons and include a perspective of the design and engineering of the nanocomposites for further enhancement of the electrocatalytic activity.",Oxygen reduction reaction; Metal-air battery; Fuel cell; Metal and nitrogen codoped; Carbon; Coordination moiety,N-DOPED CARBON; ACTIVE-SITES; CATALYST; ATOM; GRAPHENE; LAYER,Oxygen reduction reaction;Metal-air battery;Fuel cell;Metal and nitrogen codoped;Carbon;Coordination moiety;N-DOPED CARBON;ACTIVE-SITES;CATALYST;ATOM;GRAPHENE;LAYER,liqiaoxia@shiep.edu; shaowei@ucsc.edu,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2451-9103,,,,English,CURR OPIN ELECTROCHE,Review,WoS,Chemistry; Electrochemistry; Materials Science,WOS:000542172600007,2-s2.0-85079374733,United States;China,shiep.edu,Univ Calif Santa Cruz;Shanghai Univ Elect Power,"Univ Calif Santa Cruz, United States;Shanghai Univ Elect Power, China","Liu, Qiming; Li, Qiaoxia; Chen, Shaowei"
"da Silva Freitas, W., Mecheri, B., Lo Vecchio, C., Gatto, I., Baglio, V., Ficca, V.C.A., Patra, A., Placidi, E., D'Epifanio, A.",Metal-organic-framework-derived electrocatalysts for alkaline polymer electrolyte fuel cells,2022,Journal of Power Sources,550,,232135,,,,34,10.1016/j.jpowsour.2022.232135,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85139005049&doi=10.1016%2Fj.jpowsour.2022.232135&partnerID=40&md5=87a4ae6eb741278a2c1e9560f9569b10,"Department of Chemical Science and Technologies, Università degli Studi di Roma ""Tor Vergata"", Rome, RM, Italy; Istituto Di Tecnologie Avanzate Per L'energia, Messina, Messina, ME, Italy; Department of Physics, Sapienza Università di Roma, Rome, RM, Italy","da Silva Freitas, Williane, Department of Chemical Science and Technologies, Università degli Studi di Roma ""Tor Vergata"", Rome, RM, Italy; Mecheri, Barbara, Department of Chemical Science and Technologies, Università degli Studi di Roma ""Tor Vergata"", Rome, RM, Italy; Lo Vecchio, Carmelo, Istituto Di Tecnologie Avanzate Per L'energia, Messina, Messina, ME, Italy; Gatto, Irene, Istituto Di Tecnologie Avanzate Per L'energia, Messina, Messina, ME, Italy; Baglio, Vincenzo, Istituto Di Tecnologie Avanzate Per L'energia, Messina, Messina, ME, Italy; Ficca, Valerio C.A., Department of Physics, Sapienza Università di Roma, Rome, RM, Italy; Patra, Atanu, Department of Physics, Sapienza Università di Roma, Rome, RM, Italy; Placidi, Ernesto, Department of Physics, Sapienza Università di Roma, Rome, RM, Italy; D'Epifanio, Alessandra, Department of Chemical Science and Technologies, Università degli Studi di Roma ""Tor Vergata"", Rome, RM, Italy","Metal-organic frameworks were used as metal-nitrogen-carbon templates to synthesize Co–N–C catalysts through a facile synthesis approach that combined a cobalt-based zeolitic imidazolate framework (ZIF) structure and conductive carbon support. The spectroscopic, structural, and thermogravimetric analysis confirmed the synthesis of the Co-based ZIF, used to prepare catalysts with different ZIF/carbon support ratios by pyrolysis under inert atmosphere. Electrochemical characterization at alkaline pH demonstrated high activity towards oxygen reduction reaction (ORR). In addition to ORR activity, the Co–N–C electrocatalysts showed high methanol tolerance in the preliminary tests in a half-cell configuration. When assembled at the cathode side of both a hydrogen-fed anion exchange membrane fuel cell and an alkaline direct methanol fuel cell (ADMFC), the Co–N–C electrocatalysts showed competitive performance with the state-of-the-art Pt/C and other platinum-group-metal-free materials, using a FUMASEP® FAA-3-50 membrane. Exceptionally high performance (higher than 45 mW cm−2) was achieved in ADMFC fed with high methanol concentration (up to 10 M), due to the high methanol tolerance of Co–N–C electrocatalysts. Normalizing the performance to Pt loading, a value of 31.0 mW mg<inf>Pt</inf>−1 was obtained, which is the highest power up to now recorded with this kind of membrane and one of the highest values in the literature for ADMFCs. © 2022 Elsevier B.V.",Alkaline direct methanol fuel cells; Cobalt-nitrogen-carbon electrocatalysts; Hydrogen-fed anion exchange membrane fuel cells; Metal-organic frameworks; Oxygen reduction reaction,Alkaline fuel cells; Alkalinity; Carbon; Cobalt; Direct methanol fuel cells (DMFC); Electrolysis; Electrolytic reduction; Hydrogen; Ion exchange membranes; Methanol; Methanol fuels; Nitrogen; Organometallics; Oxygen; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Thermogravimetric analysis; Alkaline direct methanol fuel cells; Anion-exchange membrane fuel cells; Cobalt-nitrogen-carbon electrocatalyst; Hydrogen feed; Hydrogen-feed anion exchange membrane fuel cell; Metalorganic frameworks (MOFs); Nitrogen-carbon; Oxygen reduction reaction; Zeolitic imidazolate frameworks; ]+ catalyst; Electrocatalysts,Alkaline direct methanol fuel cells;Cobalt-nitrogen-carbon electrocatalysts;Hydrogen-fed anion exchange membrane fuel cells;Metal-organic frameworks;Oxygen reduction reaction;Alkaline fuel cells;Alkalinity;Carbon;Cobalt;Direct methanol fuel cells (DMFC);Electrolysis;Electrolytic reduction;Hydrogen;Ion exchange membranes;Methanol;Methanol fuels;Nitrogen;Organometallics;Oxygen;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Thermogravimetric analysis;Anion-exchange membrane fuel cells;Cobalt-nitrogen-carbon electrocatalyst;Hydrogen feed;Hydrogen-feed anion exchange membrane fuel cell;Metalorganic frameworks (MOFs);Nitrogen-carbon;Zeolitic imidazolate frameworks;]+ catalyst;Electrocatalysts,"B. Mecheri; Department of Chemical Science and Technologies, University of Rome Tor Vergata, Rome, Via della Ricerca Scientifica, 00133, Italy; email: barbara.mecheri@uniroma2.it",,,,,,Elsevier B.V.,03787753,0444894810,JPSOD,,English,J Power Sources,Article,Scopus,,2-s2.0-85139005049,,Italy,uniroma2.it,,,"da Silva Freitas, W.; Mecheri, B.; Lo Vecchio, C.; Gatto, I.; Baglio, V.; Ficca, V.C.A.; Patra, A.; Placidi, E.; D'Epifanio, A."
"Fu, S.F., Zhu, C.Z., Song, J.H., Du, D., Lin, Y.H.",Metal-Organic Framework-Derived Non-Precious Metal Nanocatalysts for Oxygen Reduction Reaction,2017,ADVANCED ENERGY MATERIALS,7,19,1700363,,,19,354,10.1002/aenm.201700363,,"[Fu, Shaofang; Zhu, Chengzhou; Song, Junhua; Du, Dan; Lin, Yuehe] Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA; [Du, Dan] Cent China Normal Univ, Minist Educ PR China, Key Lab Pesticide & Chem Biol, Wuhan 430079, Hubei, Peoples R China; [Du, Dan] Cent China Normal Univ, Coll Chem, Wuhan 430079, Hubei, Peoples R China",,"By virtue of diverse structures and tunable properties, metal-organic frameworks (MOFs) have presented extensive applications including gas capture, energy storage, and catalysis. Recently, synthesis of MOFs and their derived nanomaterials provide an opportunity to obtain competent oxygen reduction reaction (ORR) electrocatalysts due to their large surface area, controllable composition and pore structure. This review starts with the introduction of MOFs and current challenges of ORR, followed by the discussion of MOF-based non-precious metal nanocatalysts (metal-free and metal/metal oxidebased carbonaceous materials) and their application in ORR electrocatalysis. Current issues in MOF-derived ORR catalysts and some corresponding strategies in terms of composition and morphology to enhance their electrocatalytic performance are highlighted. In the last section, a perspective for future development of MOFs and their derivatives as catalysts for ORR is discussed.",electrocatalysis; metal-organic frameworks; non-precious metal catalysts; oxygen reduction reactions; porous nanostructures,DOPED POROUS CARBON; HIGH-SURFACE-AREA; PEM FUEL-CELLS; HIGHLY EFFICIENT; HIGH-PERFORMANCE; ELECTROCATALYTIC ACTIVITY; FE/N/C ELECTROCATALYSTS; HYDROTHERMAL SYNTHESIS; IMIDAZOLATE FRAMEWORK; NANOPOROUS CARBONS,electrocatalysis;metal-organic frameworks;non-precious metal catalysts;oxygen reduction reactions;porous nanostructures;DOPED POROUS CARBON;HIGH-SURFACE-AREA;PEM FUEL-CELLS;HIGHLY EFFICIENT;HIGH-PERFORMANCE;ELECTROCATALYTIC ACTIVITY;FE/N/C ELECTROCATALYSTS;HYDROTHERMAL SYNTHESIS;IMIDAZOLATE FRAMEWORK;NANOPOROUS CARBONS,chengzhou.zhu@wsu.edu; yuehe.lin@wsu.edu,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1614-6832,,,,English,ADV ENERGY MATER,Review,WoS,Chemistry; Energy & Fuels; Materials Science; Physics,WOS:000414918700009,,United States;China,wsu.edu,Washington State Univ;Cent China Normal Univ,"Washington State Univ, United States;Cent China Normal Univ, China","Fu, Shaofang; Zhu, Chengzhou; Song, Junhua; Du, Dan; Lin, Yuehe"
"Cui, M., Xu, B., Shi, X., Zhai, Q., Dou, Y., Li, G., Bai, Z., Ding, Y., Sun, W., Liu, H., Dou, S.",Metal-organic framework-derived single-atom catalysts for electrocatalytic energy conversion applications,2024,Journal of Materials Chemistry A,12,30,,18921,18947,,20,10.1039/d4ta03518f,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85198120316&doi=10.1039%2Fd4ta03518f&partnerID=40&md5=54a97600976e54bcb2adba51046cf0f3,"University of Shanghai for Science and Technology, Shanghai, Shanghai, China; State Key Laboratory of Organic Electronics and Information Displays, Nanjing University of Post and TeleCommunications, Nanjing, Jiangsu, China; Center of Energy Storage Materials & Technology, Nanjing University, Nanjing, Jiangsu, China; School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, Shanghai, China; School of Materials Science and Engineering Zhejiang University, Hangzhou, Zhejiang, China; University of Wollongong, Wollongong, NSW, Australia","Cui, Mingjin, University of Shanghai for Science and Technology, Shanghai, Shanghai, China, State Key Laboratory of Organic Electronics and Information Displays, Nanjing University of Post and TeleCommunications, Nanjing, Jiangsu, China; Xu, Bo, State Key Laboratory of Organic Electronics and Information Displays, Nanjing University of Post and TeleCommunications, Nanjing, Jiangsu, China; Shi, Xinwei, Center of Energy Storage Materials & Technology, Nanjing University, Nanjing, Jiangsu, China; Zhai, Qingxi, Center of Energy Storage Materials & Technology, Nanjing University, Nanjing, Jiangsu, China; Dou, Yu Hai, University of Shanghai for Science and Technology, Shanghai, Shanghai, China; Li, Guisheng, School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, Shanghai, China; Bai, Zhongchao, University of Shanghai for Science and Technology, Shanghai, Shanghai, China; Ding, Yu, Center of Energy Storage Materials & Technology, Nanjing University, Nanjing, Jiangsu, China; Sun, Wenping, School of Materials Science and Engineering Zhejiang University, Hangzhou, Zhejiang, China; Liu, Hua Kun, University of Shanghai for Science and Technology, Shanghai, Shanghai, China, University of Wollongong, Wollongong, NSW, Australia; Dou, Shixue, University of Shanghai for Science and Technology, Shanghai, Shanghai, China, University of Wollongong, Wollongong, NSW, Australia","Single-atom catalysts (SACs) derived from metal-organic frameworks (MOFs) are revolutionizing electrocatalytic energy conversion. This review explores their synthesis, characterization, and application, emphasizing their role in advancing sustainable energy technologies. SACs offer unprecedented efficiency and selectivity by dispersing individual metal atoms on a support material. This maximizes active site utilization and minimizes material usage compared to traditional catalysts. Various synthesis strategies, such as bimetallic MOF pyrolysis and ligand-coordinated anchoring, enable precise control over SACs properties. Characterization techniques like electron microscopy and spectroscopy reveal SACs structures and properties. Electron microscopy visualizes SACs morphology, while spectroscopy provides insights into metal atom coordination. In practical applications, MOF-supported SACs excel in proton-exchange membrane fuel cells (PEMFCs), direct formic acid fuel cells (DFAFCs), and Zn-air batteries (ZABs). They catalyze essential reactions, such as oxygen reduction and hydrogen oxidation, enhancing PEMFC efficiency and durability. In ZABs, SACs improve oxygen reduction and evolution reactions, boosting battery performance and stability. This review underscores the potential of MOF-derived SACs in sustainable energy conversion. By detailing synthesis, characterization, and applications, it contributes to the development of efficient catalysts for renewable energy technologies. © 2024 The Royal Society of Chemistry.",,Atoms; Catalyst activity; Chelation; Coordination reactions; Electron microscopes; Electron microscopy; Energy conservation; Organic polymers; Organometallics; Oxygen; Proton exchange membrane fuel cells (PEMFC); Renewable energy; Active site; Catalyst properties; Electrocatalytic; Metal atoms; Metalorganic frameworks (MOFs); Proton-exchange membranes fuel cells; Single-atoms; Support materials; Sustainable energy technology; ]+ catalyst; Electrolytic reduction,Atoms;Catalyst activity;Chelation;Coordination reactions;Electron microscopes;Electron microscopy;Energy conservation;Organic polymers;Organometallics;Oxygen;Proton exchange membrane fuel cells (PEMFC);Renewable energy;Active site;Catalyst properties;Electrocatalytic;Metal atoms;Metalorganic frameworks (MOFs);Proton-exchange membranes fuel cells;Single-atoms;Support materials;Sustainable energy technology;]+ catalyst;Electrolytic reduction,"Y. Ding; Center of Energy Storage Materials & Technology, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, China; email: yuding@nju.edu.cn; W. Sun; School of Materials Science and Engineering, State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China; email: wenpingsun@zju.edu.cn",,,,,,Royal Society of Chemistry,20507488,,JMCAE,,English,J. Mater. Chem. A,Review,Scopus,,2-s2.0-85198120316,,China;Australia,nju.edu.cn,,,"Cui, M.; Xu, B.; Shi, X.; Zhai, Q.; Dou, Y.; Li, G.; Bai, Z.; Ding, Y.; Sun, W.; Liu, H.; Dou, S."
"Gonen, S., Elbaz, L.",Metal organic frameworks as catalysts for oxygen reduction,2018,CURRENT OPINION IN ELECTROCHEMISTRY,9,,,179,188,10,44,10.1016/j.coelec.2018.03.035,,"[Gonen, Shmuel; Elbaz, Lior] Bar Ilan Univ, Dept Chem, Inst Nanotechnol & Adv Mat, IL-5290002 Ramat Gan, Israel",,"Non-precious metal catalysts for polymer electrolyte membrane fuel cells cathode are well studied for years in order to obtain commercial and durable fuel cell. First row transition metal complexes offer the most promising oxygen reduction reaction of this class. The attempts to increase the number of catalytic sites and surface area of catalysts lead to materials based on metal organic frameworks (MOFs). These highly organized inorganic materials show impressive catalysis when comparing other non-precious metal catalysts and platinum as well, especially in the case of zeolitic imidazolate frameworks derived materials. Currently, MOFs-based materials have very good opportunity to replace platinum and bring fuel cells technology to commercialization.",,ZEOLITIC IMIDAZOLATE FRAMEWORKS; POROUS CARBON; REDUCTION/EVOLUTION REACTIONS; FUEL-CELLS; ELECTROCATALYTIC ACTIVITIES; EFFICIENT ELECTROCATALYSTS; HYDROTHERMAL SYNTHESIS; ALKALINE ELECTROLYTE; AIR BATTERIES; ACTIVE-SITES,ZEOLITIC IMIDAZOLATE FRAMEWORKS;POROUS CARBON;REDUCTION/EVOLUTION REACTIONS;FUEL-CELLS;ELECTROCATALYTIC ACTIVITIES;EFFICIENT ELECTROCATALYSTS;HYDROTHERMAL SYNTHESIS;ALKALINE ELECTROLYTE;AIR BATTERIES;ACTIVE-SITES,lior.elbaz@hotmail.com,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2451-9103,,,,English,CURR OPIN ELECTROCHE,Review,WoS,Chemistry; Electrochemistry; Materials Science,WOS:000442798800026,2-s2.0-85046143035,Israel,hotmail.com,Bar Ilan Univ,"Bar Ilan Univ, Israel","Gonen, Shmuel; Elbaz, Lior"
"Gong, T.Y., Xue, D.P., Xu, S.R., Yu, Y., Duan, J.W., Xia, H.C., Zhang, J.N.",Metal-Single Atom Support Interactions for Enhancing Proton-Exchange Membrane Fuel Cell Cathode Stability: A Review,2024,ENERGY & FUELS,38,15,,13934,13955,22,6,10.1021/acs.energyfuels.4c02727,,"[Gong, Tianyu; Xue, Dongping; Xu, Siran; Yu, Yue; Duan, Jiawei; Xia, Huicong] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Henan, Peoples R China; [Zhang, Jia-Nan] Zhengzhou Univ, Coll Mat Sci & Engn, Key Lab Adv Energy Catalyt & Funct Mat Preparat, Zhengzhou 450012, Peoples R China",,"Proton-exchange membrane fuel cells (PEMFCs) serve as a critical technological avenue for the large-scale advancement of renewable energy and the attainment of the goals of carbon peak and carbon neutrality. However, the sluggish oxygen reduction reaction (ORR) at the cathode and the high dependence upon expensive and scarce platinum group metal (PGM)-based catalysts are the main bottlenecks limiting the large-scale development of PEMFCs. Therefore, the development of non-PGM-based catalysts, especially the highly promising single-atom catalysts (SACs), has emerged as an effective solution to reduce costs. However, the insufficient long-term stability of SACs under PEMFC operating conditions severely hampers their practical application. Metal-support interactions (MSI) are generally considered an effective strategy for enhancing the stability of SACs. Consequently, this review explores the topic of enhancing the stability of SACs in the cathode of PEMFCs by constructing single-atom-supported metal catalysts with MSI. In the discussion, the degradation pathways of SACs are initially outlined, followed by an exploration of MSI principles, synthesis strategies for single-atom-supported metal catalysts based on MSI, and their applications in enhancing the stability of PEMFC cathodes. Finally, an overview is provided regarding the challenges in the future development of single-atom-supported metal catalysts.",,OXYGEN REDUCTION REACTION; N-C ELECTROCATALYST; FE/N/C-CATALYSTS; ACTIVE-SITES; ORGANIC-FRAMEWORK; PARTICLE-SIZE; FE; PERFORMANCE; DURABILITY; DEGRADATION,OXYGEN REDUCTION REACTION;N-C ELECTROCATALYST;FE/N/C-CATALYSTS;ACTIVE-SITES;ORGANIC-FRAMEWORK;PARTICLE-SIZE;FE;PERFORMANCE;DURABILITY;DEGRADATION,zjn@zzu.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,0887-0624,,,,English,ENERG FUEL,Review,WoS,Energy & Fuels; Engineering,WOS:001270033800001,2-s2.0-85198700292,China,zzu.edu.cn,Zhengzhou Univ,"Zhengzhou Univ, China","Gong, Tianyu; Xue, Dongping; Xu, Siran; Yu, Yue; Duan, Jiawei; Xia, Huicong; Zhang, Jia-Nan"
"Shi, Q., He, Y., Bai, X., Wang, M., Cullen, D.A., Lucero, M., Zhao, X., More, K.L., Zhou, H., Feng, Z., Liu, Y., Wu, G.",Methanol tolerance of atomically dispersed single metal site catalysts: Mechanistic understanding and high-performance direct methanol fuel cells,2020,Energy and Environmental Science,13,10,,3544,3555,,179,10.1039/d0ee01968b,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096329524&doi=10.1039%2Fd0ee01968b&partnerID=40&md5=60e19f616d20265432971dca74b50f52,"School of Engineering and Applied Sciences, Buffalo, NY, United States; Texas Materials Institute, Austin, TX, United States; College of Engineering, Corvallis, OR, United States; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States; X-ray Science Division, Argonne National Laboratory, Lemont, IL, United States","Shi, Qiurong, School of Engineering and Applied Sciences, Buffalo, NY, United States; He, Yanghua, School of Engineering and Applied Sciences, Buffalo, NY, United States; Bai, Xiaowan, Texas Materials Institute, Austin, TX, United States; Wang, Maoyu, College of Engineering, Corvallis, OR, United States; Cullen, David A., Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Lucero, Marcos, College of Engineering, Corvallis, OR, United States; Zhao, Xunhua, Texas Materials Institute, Austin, TX, United States; More, Karren L., Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Zhou, Hua, X-ray Science Division, Argonne National Laboratory, Lemont, IL, United States; Feng, Zhenxing, College of Engineering, Corvallis, OR, United States; Liu, Yuanyue, Texas Materials Institute, Austin, TX, United States; Wu, Gang, School of Engineering and Applied Sciences, Buffalo, NY, United States","Proton-exchange membrane fuel cells (PEMFCs) and direct methanol fuel cells (DMFCs) are promising power sources from portable electronic devices to vehicles. The high-cost issue of these low-temperature fuel cells can be primarily addressed by using platinum-group metal (PGM)-free oxygen reduction reaction (ORR) catalysts, in particular atomically dispersed metal-nitrogen-carbon (M-N-C, M = Fe, Co, Mn). Furthermore, a significant advantage of M-N-C catalysts is their superior methanol tolerance over Pt, which can mitigate the methanol cross-over effect and offer great potential of using a higher concentration of methanol in DMFCs. Here, we investigated the ORR catalytic properties of M-N-C catalysts in methanol-containing acidic electrolytes via experiments and density functional theory (DFT) calculations. FeN4 sites demonstrated the highest methanol tolerance ability when compared to metal-free pyridinic N, CoN4, and MnN4 active sites. The methanol adsorption on MN4 sites is even strengthened when electrode potentials are applied during the ORR. The negative influence of methanol adsorption becomes significant for methanol concentrations higher than 2.0 M. However, the methanol adsorption does not affect the 4e- ORR pathway or chemically destroy the FeN4 sites. The understanding of the methanol-induced ORR activity loss guides the design of promising M-N-C cathode catalyst in DMFCs. Accordingly, we developed a dual-metal site Fe/Co-N-C catalyst through a combined chemical-doping and adsorption strategy. Instead of generating a possible synergistic effect, the introduced Co atoms in the first doping step act as ""scissors""for Zn removal in metal-organic frameworks (MOFs), which is crucial for modifying the porosity of the catalyst and providing more defects for stabilizing the active FeN4 sites generated in the second adsorption step. The Fe/Co-N-C catalyst significantly improved the ORR catalytic activity and delivered remarkably enhanced peak power densities (i.e., 502 and 135 mW cm-2) under H2-air and methanol-air conditions, respectively, representing the best performance for both types of fuel cells. Notably, the fundamental understanding of methanol tolerance, along with the encouraging DMFC performance, will open an avenue for the potential application of atomically dispersed M-N-C catalysts in other direct alcohol or ammonia fuel cells. © The Royal Society of Chemistry.",,Adsorption; Ammonia; Catalyst activity; Density functional theory; Design for testability; Electrodes; Electrolytic reduction; Gas fuel purification; Iron compounds; Manganese compounds; Metal-Organic Frameworks; Metals; Methanol; Methanol fuels; Mobile power plants; Organometallics; Oxygen reduction reaction; Proton exchange membrane fuel cells (PEMFC); Temperature; Direct methanol fuel cells (DMFCs); Low temperature fuel cells; Metalorganic frameworks (MOFs); Methanol concentration; Methanol tolerance abilities; Platinum group metals; Portable electronic devices; Proton exchange membrane fuel cell (PEMFCs); Direct methanol fuel cells (DMFC); Hyporhamphus hildebrandi,Adsorption;Ammonia;Catalyst activity;Density functional theory;Design for testability;Electrodes;Electrolytic reduction;Gas fuel purification;Iron compounds;Manganese compounds;Metal-Organic Frameworks;Metals;Methanol;Methanol fuels;Mobile power plants;Organometallics;Oxygen reduction reaction;Proton exchange membrane fuel cells (PEMFC);Temperature;Direct methanol fuel cells (DMFCs);Low temperature fuel cells;Metalorganic frameworks (MOFs);Methanol concentration;Methanol tolerance abilities;Platinum group metals;Portable electronic devices;Proton exchange membrane fuel cell (PEMFCs);Direct methanol fuel cells (DMFC);Hyporhamphus hildebrandi,"G. Wu; Department of Chemical and Biological Engineering, University at Buffalo, State University of New York, Buffalo, 14260, United States; email: gangwu@buffalo.edu",,,,,,Royal Society of Chemistry,17545692,,,,English,Energy Environ. Sci.,Article,Scopus,,2-s2.0-85096329524,,United States,buffalo.edu,,,"Shi, Q.; He, Y.; Bai, X.; Wang, M.; Cullen, D.A.; Lucero, M.; Zhao, X.; More, K.L.; Zhou, H.; Feng, Z.; Liu, Y.; Wu, G."
"Holby, E.F., Wu, G., Zelenay, P., Taylor, C.D.",Metropolis Monte Carlo search for non-precious metal catalyst active site candidates,2013,ECS Transactions,50,2,,1839,1845,,10,10.1149/05002.1839ecst,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84885732796&doi=10.1149%2F05002.1839ecst&partnerID=40&md5=5bc5feddfc1f3f7bca2ae53256223492,"Los Alamos National Laboratory, Los Alamos, NM, United States","Holby, Edward F., Los Alamos National Laboratory, Los Alamos, NM, United States; Wu, Gang, Los Alamos National Laboratory, Los Alamos, NM, United States; Zelenay, Piotr S., Los Alamos National Laboratory, Los Alamos, NM, United States; Taylor, Christopher David, Los Alamos National Laboratory, Los Alamos, NM, United States","Non-precious metal oxygen-reduction catalysts have the potential to out-perform the rare and expensive platinum group metals used for oxygen reduction reaction at the cathode of low temperature polymer electrolyte fuel cells. Understanding and optimizing non-precious metal catalyst activity is dependent upon an atomistic understanding of active site structures. Unfortunately, there exists a tremendously large configurational active site search space comprised of C, N, Fe (and/or Co), and a variety of edge termination and defect structures. We here present a stochastic search methodology that we have developed and applied to identification of candidate structure attributes using graphene as a template matrix material. © The Electrochemical Society.",,Catalyst activity; Economic geology; Electrolytic reduction; Oxygen; Polyelectrolytes; Precious metals; Proton exchange membrane fuel cells (PEMFC); Stochastic systems; Temperature; Active site structure; Low temperature polymers; Metropolis Monte Carlo; Non-precious metal catalysts; Non-precious metals; Oxygen reduction catalysts; Platinum group metals; Stochastic search; Solid electrolytes,Catalyst activity;Economic geology;Electrolytic reduction;Oxygen;Polyelectrolytes;Precious metals;Proton exchange membrane fuel cells (PEMFC);Stochastic systems;Temperature;Active site structure;Low temperature polymers;Metropolis Monte Carlo;Non-precious metal catalysts;Non-precious metals;Oxygen reduction catalysts;Platinum group metals;Stochastic search;Solid electrolytes,,,,"12th Polymer Electrolyte Fuel Cell Symposium, PEFC 2012 - 222nd ECS Meeting",,,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-84885732796,,United States,No email,,,"Holby, E.F.; Wu, G.; Zelenay, P.; Taylor, C.D."
"Zhong, J., Yan, K.J., Yang, J., Yang, W., Yang, X.D.",Microenvironment Alters the Oxygen Reduction Activity of Metal/N/C Catalysts at the Triple-Phase Boundary,2022,ACS Catalysis,12,15,,9003,9010,,33,10.1021/acscatal.2c00362,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85136483437&doi=10.1021%2Facscatal.2c00362&partnerID=40&md5=90d0fea5f3e2dec891c2f48578dcf4d6,"College of Materials Science and Engineering, Huaqiao University, Quanzhou, Fujian, China; College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China","Zhong, Jiaqiang, College of Materials Science and Engineering, Huaqiao University, Quanzhou, Fujian, China; Yan, Kejing, College of Materials Science and Engineering, Huaqiao University, Quanzhou, Fujian, China; Yang, Jing, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China; Yang, Weihua, College of Materials Science and Engineering, Huaqiao University, Quanzhou, Fujian, China; Yang, Xiaodong, College of Materials Science and Engineering, Huaqiao University, Quanzhou, Fujian, China","Metal- and nitrogen-doped carbon (M/N/C) catalysts are promising catalysts that may replace platinum in the oxygen reduction reaction (ORR) in proton-exchange membrane fuel cells. At the triple-phase boundary, the complex electrochemical interface of M/N/C catalysts involves the water film between highly dispersed active sites and aggregated ionomers, and the electrochemical behavior is different from that at the double-phase boundary, where a rotating disk electrode (RDE) is directly submerged in the aqueous solution. In this work, the ORR kinetics of the same Fe/N/C catalyst at the double-phase boundary at the RDE and the triple-phase boundary at the gas diffusion electrode (GDE) were compared to determine the microenvironmental factors that can tune the ORR activity. A model was created based on the reaction mechanism, microkinetic analysis, and local proton transport in the pores. The model fitting identified the accessible active sites and the water activity as the factors influencing the different ORR kinetics of the RDE and GDE. The surface charge and functional groups were proposed to tune the proton transport in the pores, resulting in a loss of accessible active sites when E > EQ/HQ at the GDE. Low water activity in the GDE was predicted by the model fitting. This low activity triggered a low OH∗ coverage and facilitated the reaction kinetics, but it limited the proton transport at the GDE. Strategies for improving proton transport are suggested for the future design of catalysts and ionomers. This study quantitatively demonstrates how the microenvironment alters the ORR kinetics of Fe/N/C catalysts. © 2022 American Chemical Society.",electrocatalysis; Fe/N/C catalysts; microkinetic model; oxygen reduction reaction; triple-phase boundary,Catalyst activity; Diffusion in gases; Doping (additives); Electrochemical electrodes; Electrolytic reduction; Ionomers; Kinetics; Oxygen; Phase interfaces; Proton exchange membrane fuel cells (PEMFC); Reaction kinetics; Rotating disks; Active site; Fe/N/C catalyst; Gas diffusion electrodes; Microkinetic modeling; Oxygen reduction reaction; Oxygen reduction reaction kinetics; Proton transport; Rotating disk electrodes; Triple phase boundary; ]+ catalyst; Electrocatalysis,electrocatalysis;Fe/N/C catalysts;microkinetic model;oxygen reduction reaction;triple-phase boundary;Catalyst activity;Diffusion in gases;Doping (additives);Electrochemical electrodes;Electrolytic reduction;Ionomers;Kinetics;Oxygen;Phase interfaces;Proton exchange membrane fuel cells (PEMFC);Reaction kinetics;Rotating disks;Active site;Fe/N/C catalyst;Gas diffusion electrodes;Microkinetic modeling;Oxygen reduction reaction kinetics;Proton transport;Rotating disk electrodes;Triple phase boundary;]+ catalyst,"X.-D. Yang; College of Materials Science and Engineering, Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Huaqiao University, Xiamen, Fujian, 362021, China; email: xdyang@hqu.edu.cn",,,,,,American Chemical Society,21555435,,ACCAC,,English,ACS Catal.,Article,Scopus,,2-s2.0-85136483437,,China,hqu.edu.cn,,,"Zhong, J.; Yan, K.-J.; Yang, J.; Yang, W.; Yang, X.-D."
"You, J., Zheng, Z., Luo, L., Cheng, X., Fu, C., Shen, S., Wei, G., Wang, C., Zhang, J.",Microstructures and proton networks of ionomer film on the surface of platinum single atom catalyst in polymer electrolyte membrane fuel cells,2021,Journal of Physical Chemistry C,125,43,,24240,24248,,16,10.1021/acs.jpcc.1c07670,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85118919758&doi=10.1021%2Facs.jpcc.1c07670&partnerID=40&md5=220ec92a02ecdb7744c1d91a5391bbe4,"School of Mechanical Engineering, Key Laboratory for Power Machinery and Engineering of Ministry of Education, Shanghai, China; School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; Shanghai Jiao Tong University, Shanghai, China","You, Jiabin, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; Zheng, Zhifeng, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; Luo, Liuxuan, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; Cheng, Xiaojing, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; Fu, Cehuang, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; Shen, Shuiyuan Yun, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; Wei, Guanghua, Shanghai Jiao Tong University, Shanghai, China; Wang, Chao, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; Zhang, Junliang, School of Mechanical Engineering, Key Laboratory for Power Machinery and Engineering of Ministry of Education, Shanghai, China","Pt single atom catalyst (SAC) is a promising catalyst material with ultrahigh Pt utilization efficiency and excellent electrochemical activity for PEMFCs. However, the performance of fuel cells with Pt SAC is still insufficient for practical applications, which is mainly resulting from the significant increasing proton and oxygen transport resistance in the catalyst layer. In this study, the microstructures and transport properties of ionomer film on the surface of Pt SACs are investigated by classic molecular dynamics (MD) simulations. It is found that the hydrated ionomer film can be divided into three regions including dense layer region, middle region, and top region. Hydrophilic components in dense layer region increase with higher Pt single atom loading, due to the rise of water affinity from the Pt-ionomer interface. Water clusters are mainly confined to the middle region. Besides, with the increase of Pt single atom loading, the interactions between hydrophilic and hydrophilic species are weaker. Side chains locate below or above the continuous water clusters show upward or downward configurations, heading to the water surface. An appropriate loading of Pt SACs is essential for promoting the connectivity of hydrophilic clusters as well as the accessibility of protons to Pt SACs. © 2021 American Chemical Society",,Atoms; Catalysts; Hydrophilicity; Ionomers; Loading; Microstructure; Molecular dynamics; Platinum; Polyelectrolytes; Catalyst material; Dense layer; Electrochemical activities; Ionomer films; P.E.M.F.C; Pt utilization; Single-atoms; Utilization efficiency; Water cluster; ]+ catalyst; Proton exchange membrane fuel cells (PEMFC),Atoms;Catalysts;Hydrophilicity;Ionomers;Loading;Microstructure;Molecular dynamics;Platinum;Polyelectrolytes;Catalyst material;Dense layer;Electrochemical activities;Ionomer films;P.E.M.F.C;Pt utilization;Single-atoms;Utilization efficiency;Water cluster;]+ catalyst;Proton exchange membrane fuel cells (PEMFC),"J. Zhang; Institute of Fuel Cells, School of Mechanical Engineering, MOE Key Laboratory of Power and Machinery Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; email: junliang.zhang@sjtu.edu.cn",,,,,,American Chemical Society,19327447,,,,English,J. Phys. Chem. C,Article,Scopus,,2-s2.0-85118919758,,China,sjtu.edu.cn,,,"You, J.; Zheng, Z.; Luo, L.; Cheng, X.; Fu, C.; Shen, S.; Wei, G.; Wang, C.; Zhang, J."
"Hussain, A., Lu, Y.S., Chuang, K.H., Chang, M.Y., Huang, W.Y.",Microwave-assisted synthesis of Fe–N–C catalysts using novel nitrogen precursors for proton exchange membrane fuel cells,2024,International Journal of Hydrogen Energy,84,,,658,666,,4,10.1016/j.ijhydene.2024.08.227,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85201477961&doi=10.1016%2Fj.ijhydene.2024.08.227&partnerID=40&md5=ba71fd3518f10fd661956ab2ad29cea7,"Department of Photonics, National Sun Yat-Sen University, Kaohsiung, Taiwan","Hussain, Abid, Department of Photonics, National Sun Yat-Sen University, Kaohsiung, Taiwan; Lu, Yu Shien, Department of Photonics, National Sun Yat-Sen University, Kaohsiung, Taiwan; Chuang, Kaihsiang, Department of Photonics, National Sun Yat-Sen University, Kaohsiung, Taiwan; Chang, Meiying, Department of Photonics, National Sun Yat-Sen University, Kaohsiung, Taiwan; Huang, Wenyao, Department of Photonics, National Sun Yat-Sen University, Kaohsiung, Taiwan","The current study describes a facile, time-effective and cost-viable synthesis of highly efficient Fe–N–C catalysts tailored for PEMFC. In this work, three different Fe–N–C catalysts for oxygen reduction reaction (ORR) have been synthesized by pyrolyzing different organic molecules in a microwave machine. The catalytic materials have been characterized using advanced techniques such as SEM, TEM, EDS, XPS, and BET analysis to elucidate their morphological, compositional, and surface properties. The fabricated materials i.e. Fe–N–C-Urea (Fe–N–C–U), Fe–N–C-Para-Phenylene Diamine (Fe–N–C-pPD) and Fe–N–C-5-Amino-1-(4′-Aminophenyl)-1,3,3-Trimethylindane (Fe–N–C-AAT) exhibit remarkable peak power densities, reaching as high as 0.96 W cm−2, 0.77 W cm−2 and 0.90 W cm−2, respectively, at a flow rate of 0.4 L min−1 of oxygen and 0.2 L min−1 of hydrogen, keeping the temperature constant at 80 °C. The current work emphasizes the deployment of facile and rapid synthetic protocol coupled with exploiting ingenious organic molecules and avoiding the application of any solvent. © 2024 Hydrogen Energy Publications LLC",Fe-N-C catalysts; Microwave-assisted synthesis; Oxygen reduction reaction; Peak power density; PEMFC,Electrolytic reduction; Microwave materials processing; Oxygen reduction reaction; Photodissociation; Photoionization; Rate constants; 'current; Fe-N-C catalyst; Microwave assisted synthesis; Organic molecules; P.E.M.F.C; Peak power densities; Proton-exchange membranes fuel cells; Synthesised; ]+ catalyst; Urea,Fe-N-C catalysts;Microwave-assisted synthesis;Oxygen reduction reaction;Peak power density;PEMFC;Electrolytic reduction;Microwave materials processing;Photodissociation;Photoionization;Rate constants;'current;Fe-N-C catalyst;Microwave assisted synthesis;Organic molecules;P.E.M.F.C;Peak power densities;Proton-exchange membranes fuel cells;Synthesised;]+ catalyst;Urea,"W.-Y. Huang; Department of Photonics, National Sun Yat-Sen University, Kaohsiung, 804, Taiwan; email: wyhuang@faculty.nsysu.edu.tw",,,,,,Elsevier Ltd,03603199,0080311393,IJHED,,English,Int J Hydrogen Energy,Article,Scopus,,2-s2.0-85201477961,,Taiwan,faculty.nsysu.edu.tw,,,"Hussain, A.; Lu, Y.-S.; Chuang, K.-H.; Chang, M.-Y.; Huang, W.-Y."
"Xu, M.J., Jin, Z., Xiao, M.L., Liu, C.P., Xing, W.",Microwave-Assisted Synthesis of High-Performance Fe-N-C Electrocatalyst for Proton Exchange Membrane Fuel Cells,2024,JOURNAL OF PHYSICAL CHEMISTRY C,128,25,,10568,10576,9,2,10.1021/acs.jpcc.4c03034,,"[Xu, Mingjun; Jin, Zhao; Xiao, Meiling; Liu, Changpeng; Xing, Wei] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Lab Adv Power Sources, Changchun 130022, Peoples R China; [Xu, Mingjun; Jin, Zhao; Xiao, Meiling; Liu, Changpeng; Xing, Wei] Univ Sci & Technol China, Sch Appl Chem & Engn, Hefei 230026, Peoples R China; [Jin, Zhao; Xiao, Meiling; Liu, Changpeng; Xing, Wei] Chinese Acad Sci HK Joint Lab Hydrogen Energy, Changchun 130022, Peoples R China",,"Pyrolyzed iron and nitrogen codoped carbon materials (Fe-N-C) with atomically dispersed Fe-Nx sites have received extensive attention as a highly promising alternative to Pt for oxygen reduction reaction (ORR), yet there remains a considerable performance gap between them. To further improve the catalytic performance of Fe-N-C catalysts, we herein developed a microwave-assisted method to improve both the active site density (SD) and intrinsic activity, thus achieving outstanding ORR activity. The in situ generated Fe precipitation is beneficial to improve the doping efficiency of Fe and the subsequent formation of synergetic active sites, leading to increased SD. Both the X-ray absorption spectroscopy and operando Raman confirmed the copresence of atomic Fe moieties and nanoclusters, in which the nanoclusters synergically promote the activity of the single atomic sites. The enriched synergetic active sites endow the as-prepared catalyst with excellent performance by showing a current density of 42 mA cm(-2) at 0.9 V in a proton exchange membrane fuel cell, approaching the DOE 2025 target. This work not only affords a highly active ORR catalyst but also provides a simple and potentially scale-up approach to Fe-N-C catalysts.",,OXYGEN REDUCTION REACTION; ACTIVE-SITES; CATHODE CATALYSTS; POROUS CARBON; CHALLENGES,OXYGEN REDUCTION REACTION;ACTIVE-SITES;CATHODE CATALYSTS;POROUS CARBON;CHALLENGES,zjin@ciac.ac.cn; mlxiao@ciac.ac.cn; liuchp@ciac.ac.cn; xingwei@ciac.ac.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1932-7447,,,,English,J PHYS CHEM C,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science,WOS:001247378200001,2-s2.0-85196016706,China,ciac.ac.cn,Chinese Acad Sci;Univ Sci & Technol China;Chinese Acad Sci HK Joint Lab Hydrogen Energy,"Chinese Acad Sci, China;Univ Sci & Technol China, China;Chinese Acad Sci HK Joint Lab Hydrogen Energy, China","Xu, Mingjun; Jin, Zhao; Xiao, Meiling; Liu, Changpeng; Xing, Wei"
"Choi, C.H., Baldizzone, C., Polymeros, G., Pizzutilo, E., Kasian, O., Mechler, A.K., Ranjbar-Sahraie, N., Sougrati, M.T., Mayrhofer, K.J.J., Jaouen, F.",Minimizing Operando Demetallation of Fe-N-C Electrocatalysts in Acidic Medium,2016,ACS Catalysis,6,5,,3136,3146,,230,10.1021/acscatal.6b00643,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84973470555&doi=10.1021%2Facscatal.6b00643&partnerID=40&md5=a0bbf6d4936b8b5f55967ecfa4924e23,"Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Dusseldorf, Nordrhein-Westfalen, Germany; Université de Montpellier, Montpellier, Occitanie, France; Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany","Choi, Chang Hyuck, Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Dusseldorf, Nordrhein-Westfalen, Germany; Baldizzone, Claudio, Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Dusseldorf, Nordrhein-Westfalen, Germany; Polymeros, George, Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Dusseldorf, Nordrhein-Westfalen, Germany; Pizzutilo, Enrico, Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Dusseldorf, Nordrhein-Westfalen, Germany; Kasian, Olga I., Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Dusseldorf, Nordrhein-Westfalen, Germany; Mechler, Anna K., Université de Montpellier, Montpellier, Occitanie, France; Ranjbar-Sahraie, Nastaran, Université de Montpellier, Montpellier, Occitanie, France; Sougrati, Moulay T., Université de Montpellier, Montpellier, Occitanie, France; Mayrhofer, Karl J.J., Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Dusseldorf, Nordrhein-Westfalen, Germany, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; Jaouen, Frédéric, Université de Montpellier, Montpellier, Occitanie, France","For a successful replacement of Pt, tremendous efforts have hitherto been made to develop high-performing Fe-N-C catalysts for the oxygen reduction reaction (ORR) in polymer electrolyte membrane fuel cells (PEMFCs). In comparison to the remarkable progress in activity, the stability of Fe-N-C catalysts still remains critical, however. Fe demetallation in acidic medium is hypothesized to be one critical factor for the overall lifetime. In contrast to the general belief, we herein demonstrate using an operando spectroscopic analysis that catalytically inactive Fe particles exposed to acid electrolytes cannot be fully removed by acid washing due to a relatively high open circuit potential (ca. 0.9 V<inf>RHE</inf>) leading to the formation of insoluble ferric species, whereas these particles dissolve under PEMFC operating conditions (E<inf>cathode</inf> < 0.7 V<inf>RHE</inf>) due to operando reduction to soluble ferrous cations. To overcome this issue, we demonstrate two approaches: (i) synthesis of Fe-N-C catalysts free of Fe particles and (ii) postsynthesis removal of exposed Fe particles through the control of potential using an external potentiostat or an internal reducing agent (i.e., SnCl<inf>2</inf>). Operando spectroscopic analyses verified that Fe demetallation during a given voltammetric protocol was dramatically decreased for both synthetically and postsynthetically modified Fe-N-C catalysts, while the initial ORR activity did not significantly change. However, all of these catalysts showed similar performance decay over short-term PEMFC durability tests, demonstrating the lack of a role played by ferrous cations leached from inactive Fe particles on catalyst deactivation. This supports the view that the activity is mainly imparted by FeN<inf>x</inf>C<inf>y</inf> moieties. Nevertheless, the presented guidelines are generally applicable to the whole class of Fe-N-C catalysts in order to minimize Fe demetallation in PEMFCs, which provides important advances for the future design of stable electrocatalytic systems for long-term operation. © 2016 American Chemical Society.",durability; Fe demetallation; fuel cells; nonprecious metal catalysts; operando spectroscopy; oxygen reduction reactions; scanning flow cell,Catalyst deactivation; Catalysts; Durability; Electrocatalysts; Electrolytes; Electrolytic reduction; Fuel cells; Iron; Polyelectrolytes; Positive ions; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Spectroscopic analysis; Voltage regulators; Demetallation; Flow cells; Non-precious metal catalysts; Operando spectroscopy; Oxygen reduction reaction; C (programming language),durability;Fe demetallation;fuel cells;nonprecious metal catalysts;operando spectroscopy;oxygen reduction reactions;scanning flow cell;Catalyst deactivation;Catalysts;Electrocatalysts;Electrolytes;Electrolytic reduction;Iron;Polyelectrolytes;Positive ions;Proton exchange membrane fuel cells (PEMFC);Solid electrolytes;Spectroscopic analysis;Voltage regulators;Demetallation;Flow cells;Non-precious metal catalysts;Oxygen reduction reaction;C (programming language),"C.H. Choi; Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Max-Planck-Strasse 1, 40237, Germany; email: c.h.choi@mpie.de",,,,,,American Chemical Society service@acs.org,21555435,,ACCAC,,English,ACS Catal.,Article,Scopus,,2-s2.0-84973470555,,Germany;France,mpie.de,,,"Choi, C.H.; Baldizzone, C.; Polymeros, G.; Pizzutilo, E.; Kasian, O.; Mechler, A.K.; Ranjbar-Sahraie, N.; Sougrati, M.T.; Mayrhofer, K.J.J.; Jaouen, F."
"Liu, K., Qiao, Z., Hwang, S., Liu, Z., Zhang, H., Su, D., Xu, H., Wu, G., Wang, G.",Mn- and N- doped carbon as promising catalysts for oxygen reduction reaction: Theoretical prediction and experimental validation,2019,Applied Catalysis B: Environmental,243,,,195,203,,199,10.1016/j.apcatb.2018.10.034,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85055338476&doi=10.1016%2Fj.apcatb.2018.10.034&partnerID=40&md5=7555ceaa207b626f524c7bd21211ad9f,"Department of Mechanical and Material Science Engineering, University of Pittsburgh, Pittsburgh, PA, United States; School of Engineering and Applied Sciences, Buffalo, NY, United States; Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, United States; Giner, Incorporated and Giner Electrochemical Systems, LLC, Newtown, MA, United States","Liu, Kexi, Department of Mechanical and Material Science Engineering, University of Pittsburgh, Pittsburgh, PA, United States; Qiao, Zhi, School of Engineering and Applied Sciences, Buffalo, NY, United States; Hwang, Sooyeon, Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, United States; Liu, Zhenyu, Department of Mechanical and Material Science Engineering, University of Pittsburgh, Pittsburgh, PA, United States; Zhang, Hanguang, School of Engineering and Applied Sciences, Buffalo, NY, United States; Su, Dong, Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, United States; Xu, Hui, Giner, Incorporated and Giner Electrochemical Systems, LLC, Newtown, MA, United States; Wu, Gang, School of Engineering and Applied Sciences, Buffalo, NY, United States; Wang, Guofeng, Department of Mechanical and Material Science Engineering, University of Pittsburgh, Pittsburgh, PA, United States","Development of platinum group metal (PGM)-free as well as iron-free electrocatalysts is imperative to achieve low-cost and long-term durability of polymer electrolyte membrane fuel cells. Here, we combined computational and experimental studies to investigate the mechanism, activity, and durability of Mn and N co-doped carbon (denoted as Mn-N-C) as promising catalysts for oxygen reduction reaction (ORR) in challenging acid medium. The first-principles density functional theory calculations predict that it is favorable for O<inf>2</inf> to be reduced into H<inf>2</inf>O via four-electron pathway on MnN<inf>4</inf> sites embedded in carbon layer. Using the reaction energies calculated from DFT, microkinetic analysis predicts that the MnN<inf>4</inf> sites could catalyze ORR with a half-wave potential only 60 mV lower than that of Pt (111) and 80 mV lower than that of the FeN<inf>4</inf> sites embedded in carbon layer, assuming the same density of active sites in the catalysts. Motivated by the computational prediction, we synthesized a Mn-N-C catalyst using a polymer (i.e., polyaniline-PANI) hydrogel precursor via a high temperature approach. Structural characterization indicates that atomically dispersed Mn sites coordinated with N are very likely formed in the catalyst. Electrochemical measurements show that the synthesized Mn-N-C catalyst can promote four-electron ORR with a catalytic activity in acids comparable to that of the Fe-N-C catalyst prepared using the same procedure. More importantly, the Mn-N-C catalyst exhibits superior potential cyclic stability, only losing 20 mV after 10000 cycles (0.6 to 1.0 V in O<inf>2</inf> saturated electrolyte). In comparison, the Fe-N-C catalyst would loss 80 mV after only 5000 cycles under the same testing conditions. Our computational and experimental results strongly suggest that the Mn and N co-doped carbon could be promising high-performance catalysts for ORR in acidic medium. © 2018 Elsevier B.V.",Density functional theory; Microkinetic analysis; Mn-N4active site; Oxygen reduction reaction; Polymer hydrogel,Calculations; Carbon; Computation theory; Density functional theory; Doping (additives); Durability; Electrocatalysts; Electrolytic reduction; Forecasting; Hydrogels; Iron compounds; Manganese; Oxygen; Polyaniline; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Computational predictions; Electrochemical measurements; Experimental validations; First-principles density functional theory; Micro-kinetic analysis; Oxygen reduction reaction; Polymer hydrogels; Structural characterization; Catalyst activity,Density functional theory;Microkinetic analysis;Mn-N4active site;Oxygen reduction reaction;Polymer hydrogel;Calculations;Carbon;Computation theory;Doping (additives);Durability;Electrocatalysts;Electrolytic reduction;Forecasting;Hydrogels;Iron compounds;Manganese;Oxygen;Polyaniline;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Solid electrolytes;Computational predictions;Electrochemical measurements;Experimental validations;First-principles density functional theory;Micro-kinetic analysis;Polymer hydrogels;Structural characterization;Catalyst activity,"G. Wu; Department of Chemical and Biological Engineering, University at Buffalo, the State University of New York, Buffalo, 14260, United States; email: gangwu@buffalo.edu",,,,,,Elsevier B.V.,09263373,,ACBEE,,English,Appl. Catal. B Environ.,Article,Scopus,,2-s2.0-85055338476,,United States,buffalo.edu,,,"Liu, K.; Qiao, Z.; Hwang, S.; Liu, Z.; Zhang, H.; Su, D.; Xu, H.; Wu, G.; Wang, G."
"Aralekallu, S., Singh, V.",M-N-C-based non-precious metal catalyst materials for electrocatalytic ORR applications,2025,INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER,167,,136163,,,23,0,10.1016/j.fuel.2025.136163,,"[Aralekallu, Shambhulinga; Singh, Vijay] Konkuk Univ, Dept Chem Engn, Seoul 05029, South Korea; [Aralekallu, Shambhulinga] JAIN, Ctr Res Funct Mat CRFM, Jain Global Campus, Bengaluru 562112, India",,"In response to the growing global energy demands and environmental pollution, energy storage and conversion systems are among the effective and efficient alternative energy sources to conventional, traditional combustion engines. In particular, the proton exchange membrane fuel cells (PEMFC) and metal-air batteries are among the most promising alternative devices. Although they have the cleanest form and outstanding performance, they are not suitable for affordable and large-scale industrial applications because the platinum metal-based catalysts are still dominating as the electrocatalysts for catalyzing the electrochemical reactions in these respective devices, mainly because of the sluggish kinetics of the oxygen reduction reaction (ORR) in the cathode side. To address these limitations, non-noble metal-based catalyst materials, particularly M-Nx-C-based catalysts, have been widely investigated, with significant developments occurring in recent years. In this review, the details of these catalyst materials in terms of their structure, properties, preparation strategies, advanced tools to characterize them, and recent advancements have been discussed. We describe the basic chemistry of the ORR mechanism in both acidic and alkaline media, as well as an overview of the catalyst materials. On the eve of future industrial-scale utilization of the excellent activity of these catalyst materials, the various important challenges are discussed with probable suggestions for the rational design of the ORR catalysts to address the bottlenecks.",Global energy demands; PEMFC; Sustainable developments; Energy storage and conversion systems; ORR; Electrocatalysis; Catalytic active sites; Carbon substrate; Commercial Pt/C; Single atom catalysts; M-N-x-C catalysts; MN4 sites,OXYGEN REDUCTION REACTION; NITROGEN-DOPED GRAPHENE; HIGH-PERFORMANCE ELECTROCATALYSTS; HIERARCHICALLY POROUS CARBON; SINGLE-ATOM CATALYSIS; PEM FUEL-CELLS; TRANSITION-METAL; ACTIVE-SITES; EFFICIENT ELECTROCATALYST; ORGANIC FRAMEWORK,Global energy demands;PEMFC;Sustainable developments;Energy storage and conversion systems;ORR;Electrocatalysis;Catalytic active sites;Carbon substrate;Commercial Pt/C;Single atom catalysts;M-N-x-C catalysts;MN4 sites;OXYGEN REDUCTION REACTION;NITROGEN-DOPED GRAPHENE;HIGH-PERFORMANCE ELECTROCATALYSTS;HIERARCHICALLY POROUS CARBON;SINGLE-ATOM CATALYSIS;PEM FUEL-CELLS;TRANSITION-METAL;ACTIVE-SITES;EFFICIENT ELECTROCATALYST;ORGANIC FRAMEWORK,vijayjiin2006@yahoo.com,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0735-1933,,,,English,INT COMMUN HEAT MASS,Review,WoS,Thermodynamics; Mechanics,WOS:001537087300001,2-s2.0-105010144298,South Korea;India,yahoo.com,Konkuk Univ;JAIN,"Konkuk Univ, South Korea;JAIN, India","Aralekallu, Shambhulinga; Singh, Vijay"
"Yu, S., Zheng, L., Meng, P., Shi, X., Liao, S.",M-N/C Electrocatalysts Derived from MOFs for Oxygen Reduction Reaction; 金属有机化合物框架材料衍生M-N / C类氧还原电催化剂,2021,Progress in Chemistry,33,10,,1693,1705,,3,10.7536/PC200918,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85121594938&doi=10.7536%2FPC200918&partnerID=40&md5=184c81b2bc62f720e0b14e6a4d451b97,"School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, China","Yu, Siyan, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, China; Zheng, Long, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, China; Meng, Pengfei, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, China; Shi, Xiudong, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, China; Liao, Shijun, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, China","Benefiting from its high oxygen reduction activity comparable with platinum catalyst, the transition metal and nitrogen co-doped carbon catalyst(M-N / C) has become one of the most important non-noble metal catalysts, and it is recognized as the most promising non-noble metal catalyst, as substitute of precious platinum catalyst, in proton exchange membrane fuel cells in the future. Metal organic frameworks(MOFs), a new class of crystalline porous materials with regular porous structure, high porosity, controllable morphology and size, and tunable ligands, have been regarded as perfect precursors for preparing various high-performance doped carbon catalysts. The catalysts derived from MOF often show superior structure and performance compared with those derived from conventional precursors, making them more prospective for applying in the fuel cells. Actually, it has become one of the most attractive topics to prepare M-N / C catalysts with MOFs as precursors in recent years. In this paper, we systematically introduce the research works on MOFs derived M-N / C catalysts at home and abroad in recent years, including the preparation technologies of MOF derived M-N / C catalysts, the strategies of improving the structure and performance of MOF derived carbon catalysts, as well as the research progress on the characterization technologies of such catalysts. Finally, we indicate the problems and challenges existed in MOF derived M-N / C catalysts, propose possible strategies / measures to solve the problems. The development and application of this type of new catalysts are also prospected. © 2021, Editorial Office of Progress in Chemistry. All right reserved.",Atomically; M-N / C; MOF; Non-platinum catalyst; Oxygen reduction reaction,,Atomically;M-N / C;MOF;Non-platinum catalyst;Oxygen reduction reaction,"S. Liao; School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China; email: chsjliao@scut.edu.cn",,,,,,Chinese Academy of Sciences,1005281X,,,,Chinese,Progr. Chem.,Article,Scopus,,2-s2.0-85121594938,,China,scut.edu.cn,,,"Yu, S.; Zheng, L.; Meng, P.; Shi, X.; Liao, S."
"Chen, G., Qiu, X., Liu, S., Cui, Y., Sun, Y., Zhang, Y., Liu, Y., Liu, G., Kim, Y., Xing, W., Wang, H., Shao, M.",Mn–N–C with High-Density Atomically Dispersed Mn Active Sites for the Oxygen Reduction Reaction,2025,Angewandte Chemie - International Edition,64,26,e202503934,,,,13,10.1002/anie.202503934,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105004187975&doi=10.1002%2Fanie.202503934&partnerID=40&md5=ea21beee7588aa41e793348750499fa5,"Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, China; Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Energy Institute, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, Guangdong, China; State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China","Chen, Gongjin, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, China, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Energy Institute, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Qiu, Xiaoyi, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Energy Institute, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Liu, Shiyuan, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Energy Institute, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Cui, Yingdan, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Energy Institute, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Sun, Yan, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Energy Institute, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Zhang, Yan, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Energy Institute, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Liu, Yushen, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Energy Institute, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Liu, Guimei, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Energy Institute, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Kim, Yoonseob, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Xing, Wei, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Wang, Haijiang, Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, China; Shao, Minhua, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Energy Institute, Hong Kong University of Science and Technology, Hong Kong, Hong Kong, Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, Guangdong, China","The utilization of transition metal–based catalysts as alternatives presents an attractive solution for enhancing the sluggish oxygen reduction reaction (ORR) and reducing costly platinum-based electrocatalysts in hydrogen fuel cells. Manganese-based nitrogen–carbon (Mn–N–C) is anticipated to exhibit durability due to its weaker Fenton reaction propensity. However, a key obstacle lies in boosting intrinsic electrocatalytic activity and increasing the density of Mn active sites, crucial for practical integration into fuel cell operations. Herein, a three-step method is developed to synthesize atomically dispersed Mn–N–C materials with a rich mesoporous structure as highly effective ORR catalysts. The high Mn loading (3.42 wt%) promotes the generation of Duo-MnN<inf>4</inf> active sites, demonstrating outstanding performance and durability for fuel cells. Specifically, the exceptional performance of proton exchange membrane fuel cells (PEMFC) reaches 649 mW cm−2 and anion exchange membrane fuel cells (AEMFC) achieves 770 mW cm−2. Notably, the durability of the Mn–N–C catalyst in PEMFC is reported for the first time, showing only 18.4% decay after 30 000 square-wave cycles. This work provides a unique perspective and a systematic design strategy for building feasible nonprecious metal catalysts with a high active site density, addressing the challenges of inefficiency and performance limitations across various electrocatalytic applications. © 2025 Wiley-VCH GmbH.",Electrocatalyst; Fuel cells; Nonprecious metal catalyst; Oxygen reduction reaction; Single-atom,Decay (organic); Design for testability; Electrolysis; Mesoporous materials; Active site; Attractive solutions; Metal-based catalysts; Nitrogen-carbon; Non-precious metal catalysts; Nonprecious-metal catalysts; Oxygen reduction reaction; Performance; Proton-exchange membranes fuel cells; Single-atoms; Electrolytic reduction; carbon; hydrogen; manganese; nitrogen; oxygen; platinum; proton; anion exchange; article; atom; catalyst; controlled study; density; Fenton reaction; fuel; membrane; pharmaceutics; square wave,Electrocatalyst;Fuel cells;Nonprecious metal catalyst;Oxygen reduction reaction;Single-atom;Decay (organic);Design for testability;Electrolysis;Mesoporous materials;Active site;Attractive solutions;Metal-based catalysts;Nitrogen-carbon;Non-precious metal catalysts;Nonprecious-metal catalysts;Performance;Proton-exchange membranes fuel cells;Single-atoms;Electrolytic reduction;carbon;hydrogen;manganese;nitrogen;oxygen;platinum;proton;anion exchange;article;atom;catalyst;controlled study;density;Fenton reaction;fuel;membrane;pharmaceutics;square wave,"M. Shao; Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Kowloon, 999077, Hong Kong; email: kemshao@ust.hk; H. Wang; Department of Mechanical and Energy Engineering, Key Laboratory of Energy Conversion and Storage Technologies, Southern University of Science and Technology, Shenzhen, Guangdong, China; email: wanghj@sustech.edu.cn",,,,,,John Wiley and Sons Inc,14337851,,ACIEF,40247708,English,Angew. Chem. Int. Ed.,Article,Scopus,,2-s2.0-105004187975,,Hong Kong;China,ust.hk,,,"Chen, G.; Qiu, X.; Liu, S.; Cui, Y.; Sun, Y.; Zhang, Y.; Liu, Y.; Liu, G.; Kim, Y.; Xing, W.; Wang, H.; Shao, M."
"Li, J., Zou, S., Huang, J., Wu, X., Lu, Y., Liu, X., Song, B., Dong, D.",Mn-N-P doped carbon spheres as an efficient oxygen reduction catalyst for high performance Zn-Air batteries,2023,Chinese Chemical Letters,34,1,107222,,,,16,10.1016/j.cclet.2022.02.027,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85139732257&doi=10.1016%2Fj.cclet.2022.02.027&partnerID=40&md5=bbb09dd732cef7b814b13fddefa0effd,"School of Materials Science and Engineering, University of Jinan, Jinan, Shandong, China; National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin, Heilongjiang, China","Li, Jiajie, School of Materials Science and Engineering, University of Jinan, Jinan, Shandong, China; Zou, Shanbao, School of Materials Science and Engineering, University of Jinan, Jinan, Shandong, China; Huang, Jinzhen, National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin, Heilongjiang, China; Wu, Xiaoqian, School of Materials Science and Engineering, University of Jinan, Jinan, Shandong, China; Lu, Yue, School of Materials Science and Engineering, University of Jinan, Jinan, Shandong, China; Liu, Xundao, School of Materials Science and Engineering, University of Jinan, Jinan, Shandong, China; Song, Bo, National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin, Heilongjiang, China; Dong, Dehua, School of Materials Science and Engineering, University of Jinan, Jinan, Shandong, China","Low-cost and efficient oxygen reduction reaction (ORR) electrocatalysts are the key to developing Zn-air batteries for renewable energy storage. Herein, the Mn-N-P doped carbon sphere was prepared through polymerization of hexachlorotripolyphosphazene (HCCP) and phloroglucinol, and then followed the calcination at 900 °C. Theory calculations demonstrated the introduction of Mn in N-P doped carbon could lower the dissociation barrier of O<inf>2</inf> into O* and promote the ORR through a 4e− pathway. The as-prepared catalysts exhibited a half-wave potential of 0.82 V vs. RHE and limiting current density of 5.2 mA/cm2 toward ORR, which was comparable to those of the commercial Pt/C catalysts. In addition, Zn-air batteries with 0.05 Mn-N-P-C catalysts showed a high specific capacity of 830 mAh/g<inf>Zn</inf> and excellent cycle stability. This facile approach demonstrated herein could be a solution to develop optimum non-precious metal catalysts for the application in cathodes of proton exchange membrane fuel cells. This study also provides new insight to design the catalysts of multi-heteroatom coordinated metal in the carbon matrix for both fundamental researches and practical applications. © 2022",Doped carbon spheres; Oxygen reduction reaction; Transition metal; Zn-air batteries,,Doped carbon spheres;Oxygen reduction reaction;Transition metal;Zn-air batteries,"B. Song; National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin, 150001, China; email: songbo@hit.edu.cn",,,,,,Elsevier B.V.,10018417,,CCLEE,,English,Chin. Chem. Lett.,Article,Scopus,,2-s2.0-85139732257,,China,hit.edu.cn,,,"Li, J.; Zou, S.; Huang, J.; Wu, X.; Lu, Y.; Liu, X.; Song, B.; Dong, D."
"Yang, Z., Zhang, X., Huang, K., Waqas, M., Peng, X., Wang, L., Liu, X., Huang, D., Huang, Q., Chen, D.H., Fan, Y., Chen, W.","M–Nx–C (M = Fe, Zn) bi-active sites booting oxygen reduction reaction and zinc-air battery performance",2024,Journal of Electroanalytical Chemistry,967,,118475,,,,4,10.1016/j.jelechem.2024.118475,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85197042595&doi=10.1016%2Fj.jelechem.2024.118475&partnerID=40&md5=e8200b20ede918fe563bafc04daffc08,"School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, Guangxi, China; Guangxi Vocational & Technical Institute of Industry, Nanning, Guangxi, China","Yang, Zhongyun, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, Guangxi, China; Zhang, Xiaojia, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, Guangxi, China; Huang, Kexin, Guangxi Vocational & Technical Institute of Industry, Nanning, Guangxi, China; Waqas, Muhammad, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, Guangxi, China; Peng, Xinglan, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, Guangxi, China; Wang, Limin, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, Guangxi, China; Liu, Xiaotian, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, Guangxi, China; Huang, Dujuan, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, Guangxi, China; Huang, Qiulan, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, Guangxi, China; Chen, Duhong, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, Guangxi, China; Fan, Youjun, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, Guangxi, China; Chen, Wei, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, Guangxi, China","Fe/N/C is recognized promising catalyst for oxygen reduction reaction (ORR), playing a pivotal role in advancing the commercialization of proton exchange membrane fuel cells. However, an inadequate ORR activity hinders its potential applications. Here, we present the preparation of M–Nx–C (M = Fe, Zn) bi-active sites for promoting ORR. By the pyrolysis of benzimidazole salts, a porous coin-like iron-zinc-based nitrogen-doped carbon materials (FeZn-NC) catalyst was synthesized with abundant active sites. X-ray photoelectron spectroscopy and transmission electron microscopy characterizations indicated the successful doping of Zn and Fe within the carbon framework. Electrochemical measurements demonstrated great positive half-wave potential (0.90 V), high limiting current density (5.15 mA·cm−2), excellent methanol resistance, and good stability of FeZn-NC, compared to commercial Pt/C catalysts. Furthermore, an investigation into correlation between doping content of Fe and the ORR performance was carried out. As an cathode catalyst of zinc-air battery, FeZn-NC exhibited more significant advantages, including a high open-circuit voltage (1.54 V), enhanced power density (199.89 mW·cm−2), good specific capacity (771.9 mAh g<inf>Zn</inf>−1), and enhanced stability compared to Pt/C. By presenting an approach for the controlled synthesis of metal-doped carbon materials, this work establishes the groundwork for potential applications in catalytic fields, as demonstrated by the prepared FeZn-NC. © 2024","Coin-liked carbon materials; M–Nx–C (M = Fe, Zn) bi-active sites; Oxygen reduction reaction; Performance-content-dependent relationship; Zinc-air battery","Carbon; Catalyst activity; Doping (additives); High resolution transmission electron microscopy; Iron; Iron compounds; Open circuit voltage; Oxygen; Proton exchange membrane fuel cells (PEMFC); X ray photoelectron spectroscopy; Zinc; Zinc air batteries; Zinc compounds; Active site; Carbon material; Coin-liked carbon material; Content dependent; Dependent relationship; M–nx–C (M = fe, zn) bi-active site; Oxygen reduction reaction; Performance; Performance-content-dependent relationship; Zinc-air battery; Electrolytic reduction","Coin-liked carbon materials;M–Nx–C (M = Fe, Zn) bi-active sites;Oxygen reduction reaction;Performance-content-dependent relationship;Zinc-air battery;Carbon;Catalyst activity;Doping (additives);High resolution transmission electron microscopy;Iron;Iron compounds;Open circuit voltage;Oxygen;Proton exchange membrane fuel cells (PEMFC);X ray photoelectron spectroscopy;Zinc;Zinc air batteries;Zinc compounds;Active site;Carbon material;Coin-liked carbon material;Content dependent;Dependent relationship;M–nx–C (M = fe, zn) bi-active site;Performance;Electrolytic reduction","D.-H. Chen; Guangxi Key Laboratory of Low Carbon Energy Materials, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, China; email: dhchen@gxnu.edu.cn",,,,,,Elsevier B.V.,15726657,,JECHE,,English,J Electroanal Chem,Article,Scopus,,2-s2.0-85197042595,,China,gxnu.edu.cn,,,"Yang, Z.; Zhang, X.; Huang, K.; Waqas, M.; Peng, X.; Wang, L.; Liu, X.; Huang, D.; Huang, Q.; Chen, D.-H.; Fan, Y.; Chen, W."
"Yang, X.D., Zheng, Y.P., Yang, J., Shi, W., Zhong, J.H., Zhang, C.K., Zhang, X., Hong, Y.H., Peng, X.X., Zhou, Z.Y., Sun, S.G.",Modeling Fe/N/C Catalysts in Monolayer Graphene,2017,ACS CATALYSIS,7,1,,139,145,7,97,10.1021/acscatal.6b02702,,"[Yang, Xiao-Dong; Zheng, Yanping; Yang, Jing; Shi, Wei; Zhong, Jin-Hui; Zhang, Cankun; Zhang, Xue; Hong, Yu-Hao; Peng, Xin-Xing; Zhou, Zhi-You; Sun, Shi-Gang] Xiamen Univ, Collaborat Innovat Ctr Chem Energy Mat, Coll Chem & Chem Engn, Xiamen 361005, Fujian, Peoples R China",,"Pyrolyzed Fe/N/C is one of the most promising non-precious-metal catalysts for the oxygen reduction reaction (ORR), which is supposed to boost the commercialization of proton exchange membrane fuel cells (PEMFC). However, the nature of the active sites of Fe/N/C is not clear and has long been debated. The challenges mainly come from highly heterogeneous structures formed during the pyrolysis process as well as no suitable surface probes. To elucidate the active sites, the most effective approach is building well-defined model catalysts as single-crystal planes in surface sciences. Herein, we designed a single-atomic-layer Fe/ N/C model catalyst based on monolayer graphene (FeN-MLG) to explore the active sites. The model catalyst was prepared by 950 degrees C heat treatment of graphene with controlled defects under an FeCl3(g)/NH3 atmosphere. The as-prepared model catalyst exhibits ORR activity and SCN- suppressive effect comparable to those of normal nanoparticle-like Fe/N/C catalysts, indicating that active sites are successfully created in the model catalyst. The effect of defect density, the layer number of graphene, and nitrogen species on the ORR activity has been investigated. The main content of nitrogen species on FeN-MLG is N-x-Fe, and quantitative correlation between N-x-Fe and ORR activity demonstrates that N-x-Fe species are the active site of Fe/N/C catalysts. The proposed model catalyst serves to simplify the catalyst structures and to simulate the topmost atomic layer of normal Fe/N/C, where ORR is catalyzed. This model system opens an opportunity to further understand the highly heterogeneous Fe/N/C catalysts.",oxygen reduction reaction; iron-based catalysts; monolayer graphene; model catalysts; active site,OXYGEN REDUCTION REACTION; NITROGEN-DOPED CARBON; IRON-BASED CATALYSTS; PEM FUEL-CELLS; ACTIVE-SITES; RAMAN-SPECTROSCOPY; BILAYER GRAPHENE; ELECTROCATALYSTS; DENSITY; ORR,oxygen reduction reaction;iron-based catalysts;monolayer graphene;model catalysts;active site;NITROGEN-DOPED CARBON;PEM FUEL-CELLS;ACTIVE-SITES;RAMAN-SPECTROSCOPY;BILAYER GRAPHENE;ELECTROCATALYSTS;DENSITY;ORR,zhouzy@xmu.edu.cn; sgsun@xmu.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2155-5435,,,,English,ACS CATAL,Article,WoS,Chemistry,WOS:000391783200015,2-s2.0-85020010354,China,xmu.edu.cn,Xiamen Univ,"Xiamen Univ, China","Yang, Xiao-Dong; Zheng, Yanping; Yang, Jing; Shi, Wei; Zhong, Jin-Hui; Zhang, Cankun; Zhang, Xue; Hong, Yu-Hao; Peng, Xin-Xing; Zhou, Zhi-You; Sun, Shi-Gang"
"Komini Babu, S.K., Chung, H.T., Wu, G., Zelenay, P., Litster, S.",Modeling hierarchical non-precious metal catalyst cathodes for PEFCs using multi-scale X-ray CT imaging,2014,ECS Transactions,64,3,,281,292,,19,10.1149/06403.0281ecst,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921313598&doi=10.1149%2F06403.0281ecst&partnerID=40&md5=6ee817e81798392f3b5991d5aeb9e898,"College of Engineering, Pittsburgh, PA, United States; Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States","Komini Babu, Siddharth, College of Engineering, Pittsburgh, PA, United States; Chung, Hoon Taek, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Wu, Gang, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Zelenay, Piotr S., Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Litster, Shawn E., College of Engineering, Pittsburgh, PA, United States","This paper reports the development of a model for simulating polymer electrolyte fuel cells (PEFCs) with non-precious metal catalyst (NPMC) cathodes. NPMCs present an opportunity to dramatically reduce the cost of PEFC electrodes by removing the costly Pt catalyst. To address the significant transport losses in thick NPMC cathodes (ca. >60 μm), we developed a hierarchical electrode model that resolves the unique structure of the NPMCs we studied. A unique feature of the approach is the integration of the model with morphology data extracted from nano-scale resolution X-ray computed tomography (nano-CT) imaging of the electrodes. A notable finding is the impact of the liquid water accumulation in the electrode and the significant performance improvement possible if electrode flooding is mitigated. © The Electrochemical Society.",,Catalysts; Cathodes; Computerized tomography; Electrodes; Fuel cells; Nanotechnology; Polyelectrolytes; Polymers; Precious metals; Proton exchange membrane fuel cells (PEMFC); Electrode flooding; Electrode models; Non-precious metal catalysts; Polymer electrolyte fuel cells; Pt catalysts; Transport loss; Unique features; X-ray computed tomography; Solid electrolytes,Catalysts;Cathodes;Computerized tomography;Electrodes;Fuel cells;Nanotechnology;Polyelectrolytes;Polymers;Precious metals;Proton exchange membrane fuel cells (PEMFC);Electrode flooding;Electrode models;Non-precious metal catalysts;Polymer electrolyte fuel cells;Pt catalysts;Transport loss;Unique features;X-ray computed tomography;Solid electrolytes,,"Shinohara, K.; Narayanan, S.R.; Swider-Lyons, K.; Weber, A.; Coutanceau, C.; Mantz, R.; Gasteiger, H.A.; Jones, D.; Edmundson, M.; Mitsushima, S.; Ramani, V.; Meas, Y.; Fuller, T.; Uchida, H.; Buchi, F.N.; Perry, K.A.; Schmidt, T.J.; Fenton, J.M.; Strasser, P.",,"14th Polymer Electrolyte Fuel Cell Symposium, PEFC 2014 - 226th ECS Meeting",Cancun,2014-10-05 through 2014-10-09,Electrochemical Society Inc. ecs@electrochem.org,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-84921313598,,United States,No email,,,"Komini Babu, S.K.; Chung, H.T.; Wu, G.; Zelenay, P.; Litster, S."
"Leonard, N.D., Artyushkova, K., Halevi, B., Serov, A., Atanassov, P., Barton, S.C.",Modeling of low-temperature fuel cell electrodes using non-precious metal catalysts,2015,Journal of the Electrochemical Society,162,10,,F1253,F1261,,36,10.1149/2.0311510jes,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84940176950&doi=10.1149%2F2.0311510jes&partnerID=40&md5=5a20acd63a4a7d29f097b885bb0d21f5,"College of Engineering, East Lansing, MI, United States; Department of Chemical and Nuclear Engineering, The University of New Mexico, Albuquerque, NM, United States; Pajarito Powder, Albuquerque, NM, United States","Leonard, Nathaniel D., College of Engineering, East Lansing, MI, United States; Artyushkova, Kateryna, Department of Chemical and Nuclear Engineering, The University of New Mexico, Albuquerque, NM, United States; Halevi, Barr, Pajarito Powder, Albuquerque, NM, United States; Serov, Alexey Alexandrovich, Department of Chemical and Nuclear Engineering, The University of New Mexico, Albuquerque, NM, United States; Atanassov, Plamen B., Department of Chemical and Nuclear Engineering, The University of New Mexico, Albuquerque, NM, United States; Barton, Scott Calabrese Calabrese, College of Engineering, East Lansing, MI, United States","An electrode-scale, transport model for a proton-exchange-membrane fuel cell (PEMFC) cathode is presented. The model describes the performance of non-precious metal catalysts for the oxygen reduction reaction in a fuel cell context. Because of its relatively high thickness, emphasis is placed on phenomena occurring in the cathode layer. Water flooding is studied in terms of its impact on gas-phase transport and on electrochemically accessible surface area (ECSA). Although cathode performance in both air and oxygen are susceptible to ECSA loss, gas diffusion limitations at high current density in air are more significant. In oxygen, catalyst utilization at high current density is primarily limited by conductivity. For this reason, air fuel cell data is recommended over oxygen data for characterizing catalyst performance. Due to both ohmic and mass transport limitations, increased loading of low-cost catalysts does not necessarily lead to higher performance. Therefore, careful optimization of catalyst layer thickness is required. © The Author(s) 2015.",,Catalysts; Cathodes; Electrodes; Electrolytic reduction; Electron emission; Fuel cells; Ionization of gases; Oxygen; Precious metals; Temperature; Accessible surface areas; Catalyst layer thickness; Catalyst utilization; High current densities; Low temperature fuel cells; Mass transport limitation; Non-precious metal catalysts; Oxygen reduction reaction; Proton exchange membrane fuel cells (PEMFC),Catalysts;Cathodes;Electrodes;Electrolytic reduction;Electron emission;Fuel cells;Ionization of gases;Oxygen;Precious metals;Temperature;Accessible surface areas;Catalyst layer thickness;Catalyst utilization;High current densities;Low temperature fuel cells;Mass transport limitation;Non-precious metal catalysts;Oxygen reduction reaction;Proton exchange membrane fuel cells (PEMFC),,,,,,,Electrochemical Society Inc. ecs@electrochem.org,00134651,,JESOA,,English,J Electrochem Soc,Article,Scopus,,2-s2.0-84940176950,,United States,No email,,,"Leonard, N.D.; Artyushkova, K.; Halevi, B.; Serov, A.; Atanassov, P.; Barton, S.C."
"Chen, C.J., Wu, Y.L., Li, X.L., Ye, Y.T., Li, Z.L., Zhou, Y.F., Chen, J., Yang, M.Z., Xie, F.Y., Jin, Y.S., Jones, C., Wang, N., Meng, H., Chen, S.W.",Modulating Fe spin state in FeNC catalysts by adjacent Fe atomic clusters to facilitate oxygen reduction reaction in proton exchange membrane fuel cell,2024,APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY,342,,123407,,,11,52,10.1016/j.apcatb.2023.123407,,"[Chen, Chengjie; Wu, Yinlong; Li, Xiulan; Ye, Yanting; Li, Zilong; Jin, Yanshuo; Wang, Nan; Meng, Hui] Jinan Univ, Guangdong Prov Engn Technol Res Ctr Vacuum Coating, Dept Phys,Guangzhou Key Lab Vacuum Coating Technol, Guangdong Prov Key Lab Opt Fiber Sensing & Commun,, Guangzhou 510632, Guangdong, Peoples R China; [Zhou, Yifan; Chen, Jian; Yang, Muzi; Xie, Fangyan] Sun Yat Sen Univ, Instrumental Anal & Res Ctr, Guangzhou 510275, Guangdong, Peoples R China; [Jones, Colton; Chen, Shaowei] Univ Calif Santa Cruz, Dept Chem & Biochem, 1156 High St, Santa Cruz, CA 95064 USA",,"Iron,nitrogen-codoped carbon (FeNC) has emerged as promising alternatives to precious metals for oxygen reduction reaction (ORR). Herein, we demonstrate that the ORR activity of FeNC can be markedly enhanced by the incorporation of adjacent Fe few-atom clusters (FeAC), where the octahedral field of FeAC boosts the splitting of the parallelogram field of FeN4, and facilitates the transition from high-spin (t2g 3 eg 2) Fe(III)N4 to medium-spin (t2g 5 eg 1) Fe(II)N4 and hence the interaction with the pi* antibonding orbitals of oxygen. This leads to a remarkable ORR performance due to optimized desorption of the OH* intermediate on FeN4, with a half-wave potential of +0.80 in 0.1 M HClO4, in comparison to that with only FeN4 single-atom moieties. In H2-O2 fuel cell tests, a high peak power density of 0.80 W cm-2 is obtained. Results from this work highlight the significance of spin en-gineering in the manipulation and optimization of the ORR activity of single-atom catalysts.",Single atom site; Few-atom cluster; Spin state; Oxygen reduction reaction; Proton exchange membrane fuel cell,GENERALIZED GRADIENT APPROXIMATION; POROUS CARBONS; ELECTROCATALYST; PERFORMANCE; SITES,Single atom site;Few-atom cluster;Spin state;Oxygen reduction reaction;Proton exchange membrane fuel cell;GENERALIZED GRADIENT APPROXIMATION;POROUS CARBONS;ELECTROCATALYST;PERFORMANCE;SITES,nanwang@jnu.edu.cn; tmh@jnu.edu.cn; shaowei@ucsc.edu,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0926-3373,,,,English,APPL CATAL B-ENVIRON,Article,WoS,Chemistry; Engineering,WOS:001092619600001,2-s2.0-85174588877,China;United States,jnu.edu.cn,Jinan Univ;Sun Yat Sen Univ;Univ Calif Santa Cruz,"Jinan Univ, China;Sun Yat Sen Univ, China;Univ Calif Santa Cruz, United States","Chen, Chengjie; Wu, Yinlong; Li, Xiulan; Ye, Yanting; Li, Zilong; Zhou, Yifan; Chen, Jian; Yang, Muzi; Xie, Fangyan; Jin, Yanshuo; Jones, Colton; Wang, Nan; Meng, Hui; Chen, Shaowei"
"Ge, H.X., Bibent, N., Santos, K.T., Kumar, K., Jaxel, J., Sougrati, M.T., Zitolo, A., Dupont, M., Lecoeur, F., Mermoux, M., Martin, V., Dubau, L., Jaouen, F., Maillard, F., Berthon-Fabry, S.",Modulating the Fe-N4 Active Site Content by Nitrogen Source in Fe-N-C Aerogel Catalysts for Proton Exchange Membrane Fuel Cell,2023,ACS CATALYSIS,13,2,,1149,1163,15,24,10.1021/acscatal.2c05394,,"[Ge, Hongxin; Jaxel, Julien; Berthon-Fabry, Sandrine] PSL Univ, PERSEE Ctr Procedes Energies Renouvelables & Syst, MINES ParisTech, F-06904 Sophia Antipolis, France; [Bibent, Nicolas; Sougrati, Moulay-Tahar; Dupont, Marc; Lecoeur, Frederic; Jaouen, Frederic] Univ Montpellier, ICGM, CNRS, ENSCM, F-34293 Montpellier, France; [Santos, Keyla Teixeira; Kumar, Kavita; Mermoux, Michel; Martin, Vincent; Dubau, Laetitia; Maillard, Frederic] Univ Grenoble Alpes, Univ Savoie Mont Blanc, LEPMI, CNRS,Grenoble INP, F-38000 Grenoble, France; [Zitolo, Andrea] Synchrotron SOLEIL, F-91192 Gif Sur Yvette, France",,"Fe-N-C material is regarded as a promising non-precious-metal catalyst for oxygen reduction reaction (ORR) to replace Pt-based catalysts, but its activity and mass transport remain problematic before a large-scale application in proton exchange membrane fuel cells (PEMFCs). Our previous research developed an Fe-N-C aerogel catalyst by pyrolyzing resorcinol-melamine-formaldehyde (RMF) aerogel containing iron precursors. The abundance of micro- and mesopores in aerogel is known to improve the mass transport properties of Fe-N-C cathodes in PEMFC, facilitating the diffusion of O-2 to the Fe-N-4 sites. Herein, to further improve the ORR activity while maintaining good mass transport properties, a series of Fe-NC aerogel catalysts were synthesized by modulating the nitrogen source (melamine) content and the texture in the RMF aerogel precursor. The Fe content in catalysts presents a positive relationship with melamine content in the aerogel, with adequate texture, indicating the important function of nitrogen source in stabilizing Fe atoms during pyrolysis to form Fe-N-4 active sites. Fe-57 Mossbauer spectroscopy revealed a majority of O-Fe(III)N4C12 configuration of the active sites, which is consistent with the variation of pyrrolic N content with Fe derived from X-ray photoelectron spectroscopy. As a result, the mass activity of the series of catalysts exhibits a linear relationship with Fe content and reaches 3.0 A g(-1) at 0.8 V vs reversible hydrogen electrode (RHE) in 0.05 M H2SO4 and rotating disk electrode (RDE) setup. Their performance in PEMFC exhibits the same tendency as the RDE setup. In addition, the H-2/air PEMFC polarization curves do not show any diffusion-limited current density effects, even at 0.7 A cm(-2), with a cathode based on an Fe-N-C catalyst prepared with high melamine content. This work reveals the importance of nitrogen sources to reach a high atomically dispersed Fe content in Fe-N-C catalysts with a low yield of Fe nanoparticles, and the mass transport properties in PEMFC are not affected by low mesopore volume for aerogel-based catalysts.",non-precious-metal catalyst; Fe-N-C catalyst; carbon aerogel; oxygen reduction reaction; PEMFCs,ELECTROCATALYTIC OXYGEN REDUCTION; FE/N/C-CATALYSTS; CARBON ELECTROCATALYSTS; CATHODE CATALYSTS; SODIUM-CHLORIDE; DOPED GRAPHENE; METAL CATALYST; IRON; ORR; ELECTROSORPTION,non-precious-metal catalyst;Fe-N-C catalyst;carbon aerogel;oxygen reduction reaction;PEMFCs;ELECTROCATALYTIC OXYGEN REDUCTION;FE/N/C-CATALYSTS;CARBON ELECTROCATALYSTS;CATHODE CATALYSTS;SODIUM-CHLORIDE;DOPED GRAPHENE;METAL CATALYST;IRON;ORR;ELECTROSORPTION,sandrine.berthon-fabry@mines-paristech.fr,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2155-5435,,,,English,ACS CATAL,Article,WoS,Chemistry,WOS:000913718600001,2-s2.0-85146855584,France,mines-paristech.fr,PSL Univ;Univ Montpellier;Univ Grenoble Alpes;Synchrotron SOLEIL,"PSL Univ, France;Univ Montpellier, France;Univ Grenoble Alpes, France;Synchrotron SOLEIL, France","Ge, Hongxin; Bibent, Nicolas; Santos, Keyla Teixeira; Kumar, Kavita; Jaxel, Julien; Sougrati, Moulay-Tahar; Zitolo, Andrea; Dupont, Marc; Lecoeur, Frederic; Mermoux, Michel; Martin, Vincent; Dubau, Laetitia; Jaouen, Frederic; Maillard, Frederic; Berthon-Fabry, Sandrine"
"Hou, J.F., Jian, Y.Q., Chen, C.J., Zhang, D.K., Xie, F.Y., Chen, J., Jin, Y.S., Wang, N., Yu, X., Meng, H.",Modulating the Fe spin state in FeNC catalysts by Ru nanoparticles to facilitate the oxygen reduction reaction,2024,MATERIALS CHEMISTRY FRONTIERS,8,14,,2592,2598,7,2,10.1039/d4qm00282b,,"[Hou, Jinfu; Jian, Yongqi; Chen, Chengjie; Zhang, Dengke; Jin, Yanshuo; Wang, Nan; Yu, Xiang; Meng, Hui] Jinan Univ, Guangdong Prov Engn Technol Res Ctr Vacuum Coating, Guangzhou Key Lab Vacuum Coating Technol & New Ene, Dept Phys,Siyuan Lab,Guangdong Prov Key Lab Nanoph, Guangzhou 510632, Peoples R China; [Xie, Fangyan; Chen, Jian] Sun Yat Sen Univ, Instrumental Anal & Res Ctr, Guangzhou 510275, Guangdong, Peoples R China",,"FeNC is a promising non-precious metal catalyst that can replace platinum-based catalysts in proton-exchange membrane fuel cells (PEMFCs) and zinc-air battery applications. The study utilized Fe-ZIF-8 as a precursor to improve the oxygen reduction reaction (ORR) activity of the catalyst. This was achieved by growing ruthenium particles of approximately 0.32 mu m in situ using a physical milling method under a reducing gas atmosphere. This paper demonstrates that in situ grown ruthenium nanoparticles can alter the spin state of iron atoms from the high-spin state FeN4(ii)-(t42ge2g) to the medium-spin state FeN4(ii)-(t52ge1g). This alteration changes the interactions of the pi* antibonding orbitals of the oxygen and thus improves the ORR activity. The rotating ring-disk (RDE) electrode test resulted in a half-wave potential of (E1/2) + 0.80 V vs. RHE in 0.1 M HClO4, indicating remarkable ORR performance. Zinc-air battery tests showed a high peak power density of 148 mW cm-2. FeNC is a promising non-precious metal catalyst that can replace platinum-based catalysts in proton-exchange membrane fuel cells (PEMFCs) and zinc-air battery applications.",,,,nanwang@email.jnu.edu.cn; yuxiang@jnu.edu.cn; tmh@jnu.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,,,,,English,MATER CHEM FRONT,Article,WoS,Chemistry; Materials Science,WOS:001232883200001,2-s2.0-85194381373,China,email.jnu.edu.cn,Jinan Univ;Sun Yat Sen Univ,"Jinan Univ, China;Sun Yat Sen Univ, China","Hou, Jinfu; Jian, Yongqi; Chen, Chengjie; Zhang, Dengke; Xie, Fangyan; Chen, Jian; Jin, Yanshuo; Wang, Nan; Yu, Xiang; Meng, Hui"
"Pan, Q.W., Guo, D.Z., Gao, X., Heere, M., Lu, W.J., Vietor, T., Gao, Y.",Modulating triple phase boundary of oxygen reduction reaction catalyst for fast activation of proton exchange membrane fuel cell,2024,INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,87,,,409,430,22,6,10.1016/j.ijhydene.2024.09.032,,"[Pan, Qiwen; Guo, Dezheng; Gao, Yuan] Tongji Univ, Automot Inst, Shanghai 201804, Peoples R China; [Gao, Xin; Heere, Michael] Tech Univ Carolo Wilhelmina Braunschweig, Inst Internal Combust Engines & Fuel Cells, D-38106 Braunschweig, Germany; [Lu, Weijun; Vietor, Thomas] Tech Univ Carolo Wilhelmina Braunschweig, Inst Engn Design, D-38106 Braunschweig, Germany",,"The oxygen reduction reaction (ORR) has gradually attracted attention recently due to its enormous potential applications in proton exchange membrane fuel cell (PEMFC). Therefore, developing effective and economical ORR electrocatalysts has become an increasingly important issue. Additionally, efficient ORR catalysts can accelerate the activation of PEMFC, facilitating industrial applications. This review focuses on the modulation of triple phase boundary (TPB), introducing the establishment of TPB, adsorption kinetics, and reaction kinetics. It also traces the ORR electrocatalytic mechanism. Importantly, the review discusses the latest advancements in ORR electrocatalyst development, including precious metal catalysts (Pt/C-based MEA registered a power density of 800 mW cm(-2)), non-precious metal catalyst (The power density of Fe-N/MC is up to 1.15 W cm(-2)), and non-metal catalysts (N, P, S tri-doped holey carbon with a peak power as high as 275.1 mW cm(-2)). The discussion further extends to unitary catalysts, binary catalysts, ternary catalysts, heteroatom doping, heteroatom-free doping, and defect doping. Furthermore, speculation and discussion on the prospects and challenges of ORR electrocatalysts are provided. These insights will contribute to guiding the design of ORR electrocatalysts from the TPB perspective, influencing the fast activation of fuel cells and future research.",Fast activation; PEMFC; ORR catalyst; TPB; Catalysts design,HIGH-PERFORMANCE; ORR CATALYST; CARBON NANOTUBES; NITROGEN; NANOPARTICLES; EFFICIENT; FE; ELECTROCATALYSTS; DURABILITY; ADSORPTION,Fast activation;PEMFC;ORR catalyst;TPB;Catalysts design;HIGH-PERFORMANCE;CARBON NANOTUBES;NITROGEN;NANOPARTICLES;EFFICIENT;FE;ELECTROCATALYSTS;DURABILITY;ADSORPTION,yuangao@tongji.edu.cn,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0360-3199,,,,English,INT J HYDROGEN ENERG,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels,WOS:001312405700001,2-s2.0-85203404131,China;Germany,tongji.edu.cn,Tongji Univ;Tech Univ Carolo Wilhelmina Braunschweig,"Tongji Univ, China;Tech Univ Carolo Wilhelmina Braunschweig, Germany","Pan, Qiwen; Guo, Dezheng; Gao, Xin; Heere, Michael; Lu, Weijun; Vietor, Thomas; Gao, Yuan"
"Wan, L.Y., Zhao, K.M., Wang, Y.C., Wei, N.A., Zhang, P.Y., Yuan, J.Y., Zhou, Z.Y., Sun, S.G.",Molecular Degradation of Iron Phthalocyanine during the Oxygen Reduction Reaction in Acidic Media,2022,ACS CATALYSIS,12,18,,11097,11107,11,56,10.1021/acscatal.2c03216,,"[Wan, Liyang; Zhao, Kuangmin; Wang, Yu-Cheng; Wei, Nian; Zhang, Pengyang; Zhou, Zhiyou; Sun, Shi-Gang] Xiamen Univ, Coll Chem & Chem Engn, Collaborat Innovat Ctr Chem Energy Mat, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China; [Yuan, Jiayin] Stockholm Univ, Dept Mat & Environm Chem, S-10691 Stockholm, Sweden",,"active site structure similar to practical pyrolyzed Fe/N/C catalysts for the acidic oxygen reduction reaction (ORR), making it an ideal model system to derive the degradation mechanism of such catalysts. However, the degradation mechanism of FePc during the acidic ORR has been largely unclear to date. Herein, five most likely degradation factors affecting FePcbased ORR activity are individually investigated and compared. The attack by free radicals is found to be the main reason for the instability of FePc. Assisted by the combination of several spectroscopic methods, we successfully identify the degradation products and then propose a full structural evolution of molecular FePc degradation. Finally, high similarity in the decay mechanism between molecular FePc and practical Fe/N/C catalysts was present. This study provides a clear picture of the currently missing degradation mechanism of molecular FePc during acidic ORR, which will assist future investigations on the performance degradation of practical Fe/N/C catalysts.",proton -exchange membrane fuel cells; oxygen reduction reaction; iron phthalocyanine; degradation mechanism; radical addition reaction,NONPRECIOUS METAL ELECTROCATALYSTS; MEMBRANE FUEL-CELLS; N-C CATALYSTS; HYDROXYL RADICALS; FE/N/C CATALYSTS; HIGH-PERFORMANCE; ORR CATALYST; STABILITY; PROTONATION; DURABILITY,proton -exchange membrane fuel cells;oxygen reduction reaction;iron phthalocyanine;degradation mechanism;radical addition reaction;NONPRECIOUS METAL ELECTROCATALYSTS;MEMBRANE FUEL-CELLS;N-C CATALYSTS;HYDROXYL RADICALS;FE/N/C CATALYSTS;HIGH-PERFORMANCE;ORR CATALYST;STABILITY;PROTONATION;DURABILITY,wangyc@xmu.edu.cn; zhouzy@xmu.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2155-5435,,,,English,ACS CATAL,Article,WoS,Chemistry,WOS:000849615500001,2-s2.0-85137622755,China;Sweden,xmu.edu.cn,Xiamen Univ;Stockholm Univ,"Xiamen Univ, China;Stockholm Univ, Sweden","Wan, Liyang; Zhao, Kuangmin; Wang, Yu-Cheng; Wei, Nian; Zhang, Pengyang; Yuan, Jiayin; Zhou, Zhiyou; Sun, Shi-Gang"
"Zhang, X., Bahari, Y.B., Lyu, D., Liang, L., Yu, F., Qing, M., Du, Y., Zhang, X., Tian, Z.Q., Shen, P.K.",Molecular-level design of Fe-N-C catalysts derived from Fe-dual pyridine coordination complexes for highly efficient oxygen reduction,2019,Journal of Catalysis,372,,,245,257,,66,10.1016/j.jcat.2019.03.003,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85063030005&doi=10.1016%2Fj.jcat.2019.03.003&partnerID=40&md5=8973b666eac5a8ef5cdad129efe945cc,"Guangxi University, Nanning, Guangxi, China; Department of Nanotechnology, University of Guilan, Rasht, Gilan, Iran; School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang, China; National Energy Center for Coal to Liquids, Synfuels China Technology Co.Ltd., Beijing, China; A-Star, Institute of Chemical and Engineering Sciences, Singapore City, Singapore","Zhang, Xiaoran, Guangxi University, Nanning, Guangxi, China; Bahari, Yaser, Guangxi University, Nanning, Guangxi, China, Department of Nanotechnology, University of Guilan, Rasht, Gilan, Iran; Lyu, Dandan, Guangxi University, Nanning, Guangxi, China; Liang, Lizhe, Guangxi University, Nanning, Guangxi, China; Yu, Feng, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang, China; Qing, Ming, National Energy Center for Coal to Liquids, Synfuels China Technology Co.Ltd., Beijing, China; Du, Yonghua, A-Star, Institute of Chemical and Engineering Sciences, Singapore City, Singapore; Zhang, Xinyi, Guangxi University, Nanning, Guangxi, China; Tian, Zhiqun, Guangxi University, Nanning, Guangxi, China; Shen, Peikang, Guangxi University, Nanning, Guangxi, China","Iron-nitrogen-carbon (Fe-N-C) materials as the most promising non-precious metal catalysts for oxygen reduction reaction (ORR) to replace Pt-based catalysts are in high demand for large scale application of fuel cells. However, their activity and durability are still critical issues. Development of Fe/N/C-containing precursors is a straightforward strategy for obtaining advanced Fe-N-C ORR catalysts to address these issues. Herein, we report an advanced Fe-N-C catalyst with a hybrid structure of single Fe atom sites (Fe-N<inf>x</inf> moieties) and exposed Fe carbides/nitrides nanodots with diameters <2 nm embedded onto highly graphitic N-doped carbon matrix. The catalyst is synthesized by pyrolysis of a new kind of Fe-dual pyridine coordinated complex as the precursor. This facile chemical route results in a non-conventional Fe-N-C catalyst with encapsulated Fe-metallic phase nanoparticles or Fe-Nx moieties. The catalyst exhibits excellent ORR activity and remarkable durability in both acidic and alkaline media. Its onset and half-wave potentials are 1.08 V and 0.88 V vs. (RHE) in 0.1 M KOH, respectively, and 0.95 V and 0.81 V vs. RHE, respectively, in 0.5 M H<inf>2</inf>SO<inf>4</inf>. Furthermore, a single proton exchange membrane (PEM) fuel cell fabricated by our catalyst generates the output power of 0.65 W cm−2, which indicates great potential of our hybrid structured Fe-N-C catalyst for the practical application in fuel cells. © 2019 Elsevier Inc.",Exposed iron carbides nanodots; Exposed iron nitrides nanodots; Fe-N4 moiety; Iron-nitrogen-carbon materials; Oxygen reduction reaction,Alkalinity; Carbides; Carbon; Catalyst activity; Coordination reactions; Doping (additives); Durability; Electrolytic reduction; Molecular oxygen; Nanodots; Oxygen reduction reaction; Potassium hydroxide; Proton exchange membrane fuel cells (PEMFC); Pyridine; Synthesis (chemical); Coordinated complexes; Coordination complex; Iron carbides; Iron nitrides; Iron nitrogen; Large-scale applications; Non-precious metal catalysts; Straightforward strategy; Iron compounds,Exposed iron carbides nanodots;Exposed iron nitrides nanodots;Fe-N4 moiety;Iron-nitrogen-carbon materials;Oxygen reduction reaction;Alkalinity;Carbides;Carbon;Catalyst activity;Coordination reactions;Doping (additives);Durability;Electrolytic reduction;Molecular oxygen;Nanodots;Potassium hydroxide;Proton exchange membrane fuel cells (PEMFC);Pyridine;Synthesis (chemical);Coordinated complexes;Coordination complex;Iron carbides;Iron nitrides;Iron nitrogen;Large-scale applications;Non-precious metal catalysts;Straightforward strategy;Iron compounds,"Z.Q. Tian; Collaborative Innovation Center of Sustainable Energy Materials, Guangxi Key Laboratory of Electrochemical Energy Materials, State Key Laboratory of Processing for Non-ferrous, Guangxi University, Nanning, 530004, China; email: tianzhiqun@gxu.edu.cn",,,,,,Academic Press Inc.,00219517,,JCTLA,,English,J. Catal.,Article,Scopus,,2-s2.0-85063030005,,China;Iran;Singapore,gxu.edu.cn,,,"Zhang, X.; Bahari, Y.B.; Lyu, D.; Liang, L.; Yu, F.; Qing, M.; Du, Y.; Zhang, X.; Tian, Z.Q.; Shen, P.K."
"Liu, Y., Tu, F., Zhang, Z., Zhao, Z., Guo, P., Shen, L., Zhang, Y., Zhao, L., Shao, G., Wang, Z.",Molecular scissor tailoring hierarchical architecture of ZIF-derived Fe/N/C catalysts for acidic oxygen reduction reaction,2023,Applied Catalysis B: Environmental,324,,122209,,,,69,10.1016/j.apcatb.2022.122209,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85142674597&doi=10.1016%2Fj.apcatb.2022.122209&partnerID=40&md5=6bef1bc1ddc072d63ab974187a159473,"College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, Hebei, China; MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China","Liu, Yangyang, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, Hebei, China, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China; Tu, Fengdi, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China; Zhang, Ziyu, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China; Zhao, Zigang, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, Hebei, China, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China; Guo, Pan, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China; Shen, Lixiao, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, Hebei, China, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China; Zhang, Yunlong, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China; Zhao, Lei, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China; Shao, Guangjie, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, Hebei, China; Wang, Zhenbo, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, Heilongjiang, China","Iron and nitrogen co-doped carbon (Fe/N/C) electrocatalysts have great potential to catalyze the kinetically slow oxygen reduction reaction (ORR). Unfortunately, the ORR performance of existing Fe/N/C catalysts is seriously hindered by the insufficient density and accessibility of the atomic Fe-N<inf>x</inf> moieties. Herein, the carboxylate (OAc) molecular scissor is proposed to tailor Fe doped zeolitic-imidazolate-framework-8 (ZIF-8) at atomic scale and construct a multi-dimensional concave Fe@NC catalyst structure (Fe@MNC-OAc). This molecular scissoring strategy imparts Fe@MNC-OAc with dense accessible active sites, multidimensional mass transfer pathways, hierarchical porous structure, and entangled carbon nanotubes network. Therefore, the tailored Fe@MNC-OAc electrocatalyst exhibits excellent ORR activity in acidic media with a half-wave potential of 0.838 V, which is comparable to state-of-the-art non-precious metal catalysts. When assembled as cathode catalyst in a H<inf>2</inf>-O<inf>2</inf> proton exchange membrane fuel cell, it delivers a peak power density of 903 mW cm−2. This work provides a new approach to tailoring the catalyst architecture and improving the accessibility of active sites. © 2022 Elsevier B.V.",Dense accessible active site; Hierarchical porous structure; Iron and nitrogen co-doped carbon; Oxygen reduction reaction,Availability; Carboxylation; Catalyst activity; Electrolytic reduction; Iron; Iron compounds; Mass transfer; Molecular oxygen; Network architecture; Porosity; Proton exchange membrane fuel cells (PEMFC); Active site; Co-doped; Dense accessible active site; Doped carbons; Hierarchical architectures; Hierarchical porous structures; Iron and nitrogen co-doped carbon; Molecular scissor; Oxygen reduction reaction; ]+ catalyst; Nitrogen,Dense accessible active site;Hierarchical porous structure;Iron and nitrogen co-doped carbon;Oxygen reduction reaction;Availability;Carboxylation;Catalyst activity;Electrolytic reduction;Iron;Iron compounds;Mass transfer;Molecular oxygen;Network architecture;Porosity;Proton exchange membrane fuel cells (PEMFC);Active site;Co-doped;Doped carbons;Hierarchical architectures;Hierarchical porous structures;Molecular scissor;]+ catalyst;Nitrogen,"Y. Zhang; MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, State Key Lab of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China; email: zylhit2022@163.com",,,,,,Elsevier B.V.,09263373,,ACBEE,,English,Appl. Catal. B Environ.,Article,Scopus,,2-s2.0-85142674597,,China,163.com,,,"Liu, Y.; Tu, F.; Zhang, Z.; Zhao, Z.; Guo, P.; Shen, L.; Zhang, Y.; Zhao, L.; Shao, G.; Wang, Z."
"Wang, Q., Yang, Y., Sun, F., Chen, G., Wang, J., Peng, L., Chen, W.T., Shang, L., Zhao, J., Sun-Waterhouse, D., Zhang, T., Waterhouse, G.I.N.",Molten NaCl-Assisted Synthesis of Porous Fe-N-C Electrocatalysts with a High Density of Catalytically Accessible FeN4 Active Sites and Outstanding Oxygen Reduction Reaction Performance,2021,Advanced Energy Materials,11,19,2100219,,,,262,10.1002/aenm.202100219,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85103161050&doi=10.1002%2Faenm.202100219&partnerID=40&md5=f719fdfddb77e67a19aac970fe3a5fea,"School of Chemical Sciences, University of Auckland, Auckland, AUK, New Zealand; Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China; Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Sciences, Beijing, China; Chongqing University, Chongqing, China","Wang, Qing, School of Chemical Sciences, University of Auckland, Auckland, AUK, New Zealand; Yang, Yuqi, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China; Sun, Fanfei, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China; Chen, Guangbo, Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Sciences, Beijing, China; Wang, Jian, Chongqing University, Chongqing, China; Peng, Lishan, School of Chemical Sciences, University of Auckland, Auckland, AUK, New Zealand; Chen, Wan Ting, School of Chemical Sciences, University of Auckland, Auckland, AUK, New Zealand; Shang, Lu, Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Sciences, Beijing, China; Zhao, Jiaqi, Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Sciences, Beijing, China; Sun-Waterhouse, Dongxiao, School of Chemical Sciences, University of Auckland, Auckland, AUK, New Zealand; Zhang, Tierui, Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Sciences, Beijing, China; Waterhouse, Geoffrey I. N., School of Chemical Sciences, University of Auckland, Auckland, AUK, New Zealand","Iron single atom catalysts (FeN<inf>4</inf>) hosted in the micropores of N-doped carbons offer excellent performance for the oxygen reduction reaction (ORR). Achieving a high density of FeN<inf>4</inf> sites accessible for ORR has proved challenging to date. Herein, a simple surface NaCl-assisted method towards microporous N-doped carbon electrocatalysts with an abundance of catalytically accessible FeN<inf>4</inf> sites is reported. Powder mixtures of microporous zeolitic imidazolate framework-8 and NaCl are first heated to 1000 °C in N<inf>2</inf>, with the melting of NaCl above 800 °C creating a highly porous N-doped carbon product (NC-NaCl). Ferric (Fe3+) ions are then adsorbed onto NC-NaCl, with a second pyrolysis stage at 900 °C in N<inf>2</inf> yielding a porous Fe/NC-NaCl electrocatalyst (Brunauer–Emmett–Teller surface area, 1911 m2 g−1) with an excellent dispersion and high density of accessible surface FeN<inf>4</inf> sites (26.3 × 1019 sites g−1). The Fe/NC-NaCl electrocatalyst exhibits outstanding ORR performance with a high half-wave potential of 0.832 V (vs reversible hydrogen electrode) in 0.1 m HClO<inf>4</inf>. When used as the ORR cathode catalyst in a 1.0 bar H<inf>2</inf>-O<inf>2</inf> fuel cell, Fe/NC-NaCl offers a high peak power density of 0.89 W cm−2, ranking it as one of the most active M-N-C materials reported to date. © 2021 Wiley-VCH GmbH",Fe-N-C; oxygen reduction reaction; proton exchange membrane fuel cells; surface etching; utilization of FeN 4 sites,Carbon; Doping (additives); Electrocatalysts; Electrodes; Electrolytic reduction; Fuel cells; Microporosity; Oxygen; Oxygen reduction reaction; Sodium chloride; Cathode catalyst; Half-wave potential; High peak power; Oxygen Reduction; Powder mixtures; Reversible hydrogen electrodes; Surface area; Zeolitic imidazolate framework-8; Iron compounds,Fe-N-C;oxygen reduction reaction;proton exchange membrane fuel cells;surface etching;utilization of FeN 4 sites;Carbon;Doping (additives);Electrocatalysts;Electrodes;Electrolytic reduction;Fuel cells;Microporosity;Oxygen;Sodium chloride;Cathode catalyst;Half-wave potential;High peak power;Oxygen Reduction;Powder mixtures;Reversible hydrogen electrodes;Surface area;Zeolitic imidazolate framework-8;Iron compounds,"G.I.N. Waterhouse; School of Chemical Sciences, The University of Auckland, Auckland, 1142, New Zealand; email: g.waterhouse@auckland.ac.nz; T. Zhang; Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China; email: tierui@mail.ipc.ac.cn",,,,,,John Wiley and Sons Inc,16146832,,,,English,Adv. Energy Mater.,Article,Scopus,,2-s2.0-85103161050,,New Zealand;China,auckland.ac.nz,,,"Wang, Q.; Yang, Y.; Sun, F.; Chen, G.; Wang, J.; Peng, L.; Chen, W.-T.; Shang, L.; Zhao, J.; Sun-Waterhouse, D.; Zhang, T.; Waterhouse, G.I.N."
"Bai, J.S., Zhao, T., Xu, M.J., Mei, B.B., Yang, L.T., Shi, Z.P., Zhu, S.Y., Wang, Y., Jiang, Z., Zhao, J., Ge, J.J., Xiao, M.L., Liu, C.P., Xing, W.",Monosymmetric Fe-N4 sites enabling durable proton exchange membrane fuel cell cathode by chemical vapor modification,2024,NATURE COMMUNICATIONS,15,1,4219,,,10,52,10.1038/s41467-024-47817-0,,"[Bai, Jingsen; Xu, Mingjun; Yang, Liting; Shi, Zhaoping; Zhu, Siyuan; Zhao, Jin; Ge, Junjie; Xiao, Meiling; Liu, Changpeng; Xing, Wei] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Jilin Prov Key Lab Low Carbon Chem Power, Changchun 130022, Peoples R China; [Bai, Jingsen; Xu, Mingjun; Yang, Liting; Shi, Zhaoping; Zhu, Siyuan; Zhao, Jin; Ge, Junjie; Xiao, Meiling; Liu, Changpeng; Xing, Wei] Univ Sci & Technol China, Sch Appl Chem & Engn, Hefei 230026, Peoples R China; [Zhao, Tuo] FAW Jiefang Automot Co Ltd, Commercial Vehicle Dev Inst, Changchun 130011, Peoples R China; [Mei, Bingbao] Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai Synchrotron Radiat Facil, Shanghai 201800, Peoples R China; [Wang, Ying] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Peoples R China; [Jiang, Zheng] Univ Sci & Technol China, Natl Synchrotron Radiat Lab NSRL, Hefei 230026, Peoples R China",,"The limited durability of metal-nitrogen-carbon electrocatalysts severely restricts their applicability for the oxygen reduction reaction in proton exchange membrane fuel cells. In this study, we employ the chemical vapor modification method to alter the configuration of active sites from FeN4 to the stable monosymmetric FeN2+N'(2), along with enhancing the degree of graphitization in the carbon substrate. This improvement effectively addresses the challenges associated with Fe active center leaching caused by N-group protonation and free radicals attack due to the 2-electron oxygen reduction reaction. The electrocatalyst with neoteric active site exhibited excellent durability. During accelerated aging test, the electrocatalyst exhibited negligible decline in its half-wave potential even after undergoing 200,000 potential cycles. Furthermore, when subjected to operational conditions representative of fuel cell systems, the electrocatalyst displayed remarkable durability, sustaining stable performance for a duration exceeding 248 h. The significant improvement in durability provides highly valuable insights for the practical application of metal-nitrogen-carbon electrocatalysts.",,FE-N-C; OXYGEN REDUCTION; CATALYSTS,FE-N-C;OXYGEN REDUCTION;CATALYSTS,ywang_2012@ciac.ac.cn; zjin@ciac.ac.cn; gejunjie@ustc.edu.cn; xingwei@ciac.ac.cn,,"HEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY",,,,NATURE PORTFOLIO,,,,38760340,English,NAT COMMUN,Article,WoS,Science & Technology - Other Topics,WOS:001227428300034,2-s2.0-85193536615,China,ciac.ac.cn,Chinese Acad Sci;Univ Sci & Technol China;FAW Jiefang Automot Co Ltd,"Chinese Acad Sci, China;Univ Sci & Technol China, China;FAW Jiefang Automot Co Ltd, China","Bai, Jingsen; Zhao, Tuo; Xu, Mingjun; Mei, Bingbao; Yang, Liting; Shi, Zhaoping; Zhu, Siyuan; Wang, Ying; Jiang, Zheng; Zhao, Jin; Ge, Junjie; Xiao, Meiling; Liu, Changpeng; Xing, Wei"
"Wen, X., Yu, C., Yan, B., Zhang, X., Liu, B., Xie, H., Kang Shen, P., Qun Tian, Z.",Morphological and microstructural engineering of Mn-N-C with strengthened Mn-N bond for efficient electrochemical oxygen reduction reaction,2023,Chemical Engineering Journal,475,,146135,,,,26,10.1016/j.cej.2023.146135,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85171888793&doi=10.1016%2Fj.cej.2023.146135&partnerID=40&md5=c691e988f818f70a3f38ef8e3cc0b144,"State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China","Wen, Xingyu, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Yu, Cunhuai, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Yan, Bowen, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Zhang, Xiaoran, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Liu, Bin, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Xie, Huarui, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Kang Shen, Pei, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Qun Tian, Zhi, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China","Revealing the correlation between the micro–macro structures and active sites of transition metal-nitrogen-carbon (M−N−C) for electrochemical oxygen reduction reaction (ORR) is essential to develop non-precious metal catalyzed fuel cells and metal-air batteries. Herein, Mn-N-C catalysts with various morphologies and microstructures were prepared using Mn2+ coordinated bis(imino)-pyridine-based polymer with N-rich content as a new platform of precursor, which was synthesized via a condensation reaction of 1H-1, 2, 4-Triazole-3, 5-Diamine and 2, 6-Diacetylpyridine. Results demonstrate that morphologies and fine structures (pore structure, N dopants, surface area, and atomic Mn-N bond length, etc.) of Mn-N-C catalysts are strongly dependent on the growth of the specific precursor with and without NaCl as a template and the secondary calcination temperature can further optimize the bond length of Mn-Nx moieties, resulting in significant activity differences between correspondingly derived Mn-N-C catalysts for ORR. Compared to Mn-N-C derived from the synthesized precursor without NaCl, Mn-N-C obtained by the precursor grown directly on NaCl features an ultra-thin nanosheet-like structure with a hierarchical pore distribution and a shorter Mn-N bond, presenting high ORR performance with a half-wave potential of 0.88 V in 0.1 M KOH and a tiny potential loss of 11 mV after 30 K cycles, which is also proved by high-performance practical single Zn-Air battery (139 mW·cm−2) and proton exchange membrane fuel cell (400 mW·cm−2). This work provides a new understanding of the critical role of morphology and Mn-N bonding length of M−N−C for enhancing ORR and a new route of developing non-Fe/Co-based M−N−C catalysts for electrocatalysis. © 2023 Elsevier B.V.",Fuel cells; Microstructure and morphology; Mn-Nx moiety; Oxygen reduction reaction; Transition metal-nitrogen-carbon; Zn-Air batteries,Carbon; Catalyst activity; Cell engineering; Coordination reactions; Electrocatalysis; Electrolytic reduction; Manganese compounds; Morphology; Nitrogen; Oxygen; Pore structure; Potassium hydroxide; Proton exchange membrane fuel cells (PEMFC); Sodium chloride; Synthesis (chemical); Zinc compounds; Electrochemical oxygen reduction; Micro-macro; Microstructural engineering; Microstructure and morphology; Mn-nx moiety; Nitrogen-carbon; Oxygen reduction reaction; Synthesised; Transition metal-nitrogen-carbon; ]+ catalyst; Transition metals,Fuel cells;Microstructure and morphology;Mn-Nx moiety;Oxygen reduction reaction;Transition metal-nitrogen-carbon;Zn-Air batteries;Carbon;Catalyst activity;Cell engineering;Coordination reactions;Electrocatalysis;Electrolytic reduction;Manganese compounds;Morphology;Nitrogen;Oxygen;Pore structure;Potassium hydroxide;Proton exchange membrane fuel cells (PEMFC);Sodium chloride;Synthesis (chemical);Zinc compounds;Electrochemical oxygen reduction;Micro-macro;Microstructural engineering;Nitrogen-carbon;Synthesised;]+ catalyst;Transition metals,"Z. Qun Tian; Collaborative Innovation Center of Sustainable Energy Materials, School of Physical Science and Technology, Guangxi University, Institute of Science and Technology for Carbon Peak & Neutrality, Guangxi University, Guangxi Key Laboratory of Electrochemical Energy Materials, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning, 530004, China; email: tianzhiqun@gxu.edu.cn",,,,,,Elsevier B.V.,13858947,,CMEJA,,English,Chem. Eng. J.,Article,Scopus,,2-s2.0-85171888793,,China,gxu.edu.cn,,,"Wen, X.; Yu, C.; Yan, B.; Zhang, X.; Liu, B.; Xie, H.; Kang Shen, P.; Qun Tian, Z."
"Adabi, H., Shakouri, A., Zitolo, A., Asset, T., Khan, A., Bohannon, J., Chattot, R., Williams, C., Jaouen, F., Regalbuto, J.R., Mustain, W.E.",Multi-atom Pt and PtRu catalysts for high performance AEMFCs with ultra-low PGM content,2023,Applied Catalysis B: Environmental,325,,122375,,,,19,10.1016/j.apcatb.2023.122375,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85146162996&doi=10.1016%2Fj.apcatb.2023.122375&partnerID=40&md5=dfe08e68826e59676ae91dbe679b1a1d,"Molinaroli College of Engineering and Computing, Columbia, SC, United States; L′Orme des Merisiers, SOLEIL Synchrotron, Gif-sur-Yvette, France; Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France","Adabi, Horie, Molinaroli College of Engineering and Computing, Columbia, SC, United States; Shakouri, Abolfazl, Molinaroli College of Engineering and Computing, Columbia, SC, United States; Zitolo, Andrea, L′Orme des Merisiers, SOLEIL Synchrotron, Gif-sur-Yvette, France; Asset, Tristan, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Khan, Anastassiya, L′Orme des Merisiers, SOLEIL Synchrotron, Gif-sur-Yvette, France; Bohannon, Jasmine, Molinaroli College of Engineering and Computing, Columbia, SC, United States; Chattot, Raphaël, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Williams, Christopher T., Molinaroli College of Engineering and Computing, Columbia, SC, United States; Jaouen, Frédéric, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Regalbuto, John R., Molinaroli College of Engineering and Computing, Columbia, SC, United States; Mustain, William E., Molinaroli College of Engineering and Computing, Columbia, SC, United States","To reduce the platinum group metal (PGM) loading in anion exchange membrane fuel cells (AEMFCs), it is important to transition to catalysts with very low PGM content, and eventually to catalysts that are completely PGM-free. In this work, four supported low-PGM Pt and PtRu catalysts were prepared using a new, simple, scalable technique: Controlled Surface Tension (CST) method. CST allows for a high density of very small multi-atom clusters. Catalysts were physically characterized using a wide array of techniques and tested for their ORR and HOR activity both ex-situ and integrated into operating AEMFCs. The PGM loading was reduced by a factor of 14 while achieving comparable performance to commercial catalysts. AEMFCs were also assembled with ultralow PGM loading (0.05 mgPGM cm-2), where PtRu anodes were paired with Fe–N–C cathodes to achieve a specific power of 25 W/mg<inf>PGM</inf> (40 W/mg<inf>Pt</inf>). © 2023 Elsevier B.V.",AEM; Catalyst; Fuel cell; Hydrogen oxidation; Low PGM; Oxygen reduction,Alkaline fuel cells; Binary alloys; Electrodes; Electrolytic reduction; Hydrogen; Ion exchange membranes; Oxygen; Platinum; Proton exchange membrane fuel cells (PEMFC); AEM; Anion-exchange membrane fuel cells; Hydrogen oxidation; Low platinum group metal; Metal loadings; Oxygen Reduction; Platinum group metals; Pt catalysts; PtRu catalysts; ]+ catalyst; Catalysts,AEM;Catalyst;Fuel cell;Hydrogen oxidation;Low PGM;Oxygen reduction;Alkaline fuel cells;Binary alloys;Electrodes;Electrolytic reduction;Hydrogen;Ion exchange membranes;Oxygen;Platinum;Proton exchange membrane fuel cells (PEMFC);Anion-exchange membrane fuel cells;Low platinum group metal;Metal loadings;Platinum group metals;Pt catalysts;PtRu catalysts;]+ catalyst;Catalysts,"J.R. Regalbuto; Department of Chemical Engineering, University of South Carolina, Columbia, 29208, United States; email: regalbuj@cec.sc.edu",,,,,,Elsevier B.V.,09263373,,ACBEE,,English,Appl. Catal. B Environ.,Article,Scopus,,2-s2.0-85146162996,,United States;France,cec.sc.edu,,,"Adabi, H.; Shakouri, A.; Zitolo, A.; Asset, T.; Khan, A.; Bohannon, J.; Chattot, R.; Williams, C.; Jaouen, F.; Regalbuto, J.R.; Mustain, W.E."
"Guo, W.X., Liu, Y.H., Zhou, H., Wu, Y.",Multiscale designing principle of M-N-C towards high performance PEMFC,2025,MICROSTRUCTURES,5,2,2025031,,,15,3,10.20517/microstructures.2024.91,,"[Guo, Wenxin; Liu, Yinghuan; Zhou, Huang; Wu, Yuen] Univ Sci & Technol China, Sch Chem & Mat Sci, Key Lab Precis & Intelligent, Hefei 230026, Anhui, Peoples R China; [Guo, Wenxin; Liu, Yinghuan; Zhou, Huang; Wu, Yuen] Univ Sci & Technol China, Sch Chem & Mat Sci, Deep Space Explorat Lab, 96 Jinzhai Rd Baohe District, Hefei 230026, Anhui, Peoples R China",,"Among the reported non-precious-metal catalysts, metal-nitrogen-carbon (M-N-C) catalysts have emerged as a research cornerstone in the field of electrocatalysis, showcasing unparalleled activity in oxygen reduction reactions that rivals or even exceeds that of commercial Pt catalysts. Despite boasting high atom utilization and adjustable effective activity centers, M-N-C catalysts suffer from inadequate long-term stability under high-pressure and harshly acidic conditions within proton exchange membrane fuel cells (PEMFCs). This drawback poses a significant challenge that critically limits their potential for widespread applications. From this perspective, we commence by delineating the pivotal strategies to augment the performance of M-N-C catalysts at the microscopic level, including the tuning of the intrinsic activity of individual active sites and the manipulation of their quantity. Furthermore, we delve into the benefits derived from the synergistic effects unleashed by the incorporation of multi-component active sites. At the mesoscopic level, this perspective engages with the design principles aimed at enhancing the activity and stability of M-N-C catalysts within the intricate three-phase boundary of PEMFCs. Ultimately, we prospect the opportunities and challenges facing the future evolution of M-N-C catalysts, with the aim of offering comprehensive guidance for the design and advancement of highly stable M-N-C catalysts tailored for PEMFC applications.",Single-atom catalysts; M-N-C catalysts; oxygen reduction reaction; proton exchange membrane fuel cells,OXYGEN REDUCTION REACTION; EFFICIENT MASS-TRANSPORT; IRON-BASED CATALYSTS; CELL PERFORMANCE; POROUS CARBON; ACTIVE-SITES; ELECTROCATALYST; NANOPARTICLES; DURABILITY; CHALLENGES,Single-atom catalysts;M-N-C catalysts;oxygen reduction reaction;proton exchange membrane fuel cells;EFFICIENT MASS-TRANSPORT;IRON-BASED CATALYSTS;CELL PERFORMANCE;POROUS CARBON;ACTIVE-SITES;ELECTROCATALYST;NANOPARTICLES;DURABILITY;CHALLENGES,huangz02@ustc.edu.cn,,"245 E MAIN ST, ST122, ALHAMBRA, CA 91801 USA",,,,OAE PUBLISHING INC,,,,,English,MICROSTRUCTURES,Article,WoS,Materials Science,WOS:001474712500001,2-s2.0-105005215911,China,ustc.edu.cn,Univ Sci & Technol China,"Univ Sci & Technol China, China","Guo, Wenxin; Liu, Yinghuan; Zhou, Huang; Wu, Yuen"
"Wang, R.G., Yang, Y.Y., Zhao, Y., Yang, L.J., Yin, P.F., Mao, J., Ling, T.",Multiscale structural engineering of atomically dispersed FeN4 electrocatalyst for proton exchange membrane fuel cells,2021,JOURNAL OF ENERGY CHEMISTRY,58,,,629,635,7,42,10.1016/j.jechem.2020.10.036,,"[Wang, Ruguang; Yang, Yuanyuan; Zhao, Yang; Yang, Liujing; Mao, Jing; Ling, Tao] Tianjin Univ, Sch Mat Sci & Engn, Key Lab Adv Ceram & Machining Technol, Minist Educ, Tianjin 300072, Peoples R China; [Yin, Pengfei] City Univ Hong Kong, Dept Chem, Kowloon, Hong Kong, Peoples R China",,"Atomically dispersed iron-nitrogen-carbon (Fe-N-C) catalysts have emerged as the most promising alternative to the expensive Pt-based catalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs), however suffer from low site density of active Fe-N-4 moiety and limited mass transport during the catalytic reaction. To address these challenges, we report a three-dimensional (3D) metal-organic frameworks (MOF)-derived Fe-N-C single-atom catalyst. In this well-designed Fe-N-C catalyst, the micro-scale interconnected skeleton, the nano-scale ordered pores and the atomic-scale abundant carbon edge defects inside the skeleton significantly enhance the site density of active Fe-N-4 moiety, thus improving the Fe utilization in the final catalyst. Moreover, the combination of the above mentioned micro- and nano-scale structures greatly facilitates the mass transport in the 3D Fe-N-C catalyst. Therefore, the multiscale engineered Fe-N-C single-atom catalyst achieves excellent ORR performance under acidic condition and affords a significantly enhanced current density and power density in PEMFC. Our findings may open new opportunities for the rational design of Fe-N-C catalysts through multiscale structural engineering. (C) 2020 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.",Fe-N-C catalyst; Fe-N-4; Proton exchange membrane fuel cells; Oxygen reduction reaction; Single-atom catalyst,OXYGEN REDUCTION REACTION; DENSITY-FUNCTIONAL THEORY; ACTIVE-SITES; FE/N/C CATALYSTS; EFFICIENT OXYGEN; POROUS CARBON; GRAPHENE; IRON; ORR; IDENTIFICATION,Fe-N-C catalyst;Fe-N-4;Proton exchange membrane fuel cells;Oxygen reduction reaction;Single-atom catalyst;DENSITY-FUNCTIONAL THEORY;ACTIVE-SITES;FE/N/C CATALYSTS;EFFICIENT OXYGEN;POROUS CARBON;GRAPHENE;IRON;ORR;IDENTIFICATION,pengfyin@cityu.edu.hk; maojing@tju.edu.cn; lingt04@tju.edu.cn,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2095-4956,,,,English,J ENERGY CHEM,Article,WoS,Chemistry; Energy & Fuels; Engineering,WOS:000640115800003,2-s2.0-85097392380,China,cityu.edu.hk,Tianjin Univ;City Univ Hong Kong,"Tianjin Univ, China;City Univ Hong Kong, China","Wang, Ruguang; Yang, Yuanyuan; Zhao, Yang; Yang, Liujing; Yin, Pengfei; Mao, Jing; Ling, Tao"
"Bai, J., Guan, X., Qu, H., Liang, L., Ru, C., Gong, X., Jin, Z., Xiao, M., Liu, C., Xing, W.",Multiscale Structure Regulation Induced by Fluorine Coordination Enables High-Performance and Durable PEMFC,2025,ACS Energy Letters,10,6,,2743,2751,,6,10.1021/acsenergylett.5c00510,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105005090967&doi=10.1021%2Facsenergylett.5c00510&partnerID=40&md5=8465ac9dd4c6babc29416469d93f0fd5,"State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Powertrain Department, FAW Group Corporation, Changchun, Jilin, China; Engine Development Department, FAW Group Corporation, Changchun, Jilin, China","Bai, Jingsen, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Guan, Xin, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Qu, Hanshi, Powertrain Department, FAW Group Corporation, Changchun, Jilin, China; Liang, Liang, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Ru, Chunyu, Powertrain Department, FAW Group Corporation, Changchun, Jilin, China; Gong, Xue, Engine Development Department, FAW Group Corporation, Changchun, Jilin, China; Jin, Zhao, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Xiao, Meiling, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Liu, Changpeng, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Xing, Wei, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China","The stability enhancement of metal-nitrogen-carbon (M-N-C) is often inevitably accompanied by a loss of activity. Additionally, during the long-term operation, the activity frequently declines due to water flooding effects, significantly reducing the lifetime of the membrane electrode assembly (MEA). Herein, fluorine (F)-doping was employed to bypass the activity-stability trade-off of Fe-N-C catalysts. F incorporation increases the metal dissolution energy and lowers the electron density of Fe-N<inf>4</inf> sites, improving both stability and catalytic activity. Besides, the hydrophobicity of F can improve water management performance within the MEA, markedly reducing oxygen transport resistance. As a result, the F-doped Fe-N-C cathode enables a high peak power density of 1.1 W cm-2, far exceeding the Fe-N-C counterpart (0.79 W cm-2). More importantly, 90% of the power density can be retained after 30000 cycles of accelerated stress testing, demonstrating huge application potential in fuel cells. © 2025 American Chemical Society.",,F-doping; Flooding effects; Membrane electrode assemblies; Multi-scale structures; Nitrogen-carbon; P.E.M.F.C; Performance; Stability enhancement; Trade off; ]+ catalyst; Semiconductor doping,F-doping;Flooding effects;Membrane electrode assemblies;Multi-scale structures;Nitrogen-carbon;P.E.M.F.C;Performance;Stability enhancement;Trade off;]+ catalyst;Semiconductor doping,"Z. Jin; State Key Laboratory of Electroanalytic Chemistry, Jilin Province Key Laboratory of Low Carbon Chemistry Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: zjin@ciac.ac.cn; M. Xiao; State Key Laboratory of Electroanalytic Chemistry, Jilin Province Key Laboratory of Low Carbon Chemistry Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: mlxiao@ciac.ac.cn; C. Liu; State Key Laboratory of Electroanalytic Chemistry, Jilin Province Key Laboratory of Low Carbon Chemistry Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: liuchp@ciac.ac.cn; W. Xing; State Key Laboratory of Electroanalytic Chemistry, Jilin Province Key Laboratory of Low Carbon Chemistry Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: xingwei@ciac.ac.cn",,,,,,American Chemical Society,,,,,English,ACS Energy Lett.,Article,Scopus,,2-s2.0-105005090967,,China,ciac.ac.cn,,,"Bai, J.; Guan, X.; Qu, H.; Liang, L.; Ru, C.; Gong, X.; Jin, Z.; Xiao, M.; Liu, C.; Xing, W."
"Zhu, W., Pei, Y., Douglin, J.C., Zhang, J., Zhao, H., Xue, J., Wang, Q., Li, R., Qin, Y., Yin, Y., Dekel, D.R., Guiver, M.D.",Multi-scale study on bifunctional Co/Fe–N–C cathode catalyst layers with high active site density for the oxygen reduction reaction,2021,Applied Catalysis B: Environmental,299,,120656,,,,86,10.1016/j.apcatb.2021.120656,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85113782002&doi=10.1016%2Fj.apcatb.2021.120656&partnerID=40&md5=63d12d79230b970293bfec308ef35111,"Tianjin University, Tianjin, China; Technion - Israel Institute of Technology, Haifa, Israel; Tianjin University, Tianjin, China; Shenzhen Intellifusion Ltd., Shenzhen, China; Technion - Israel Institute of Technology, Haifa, Israel","Zhu, Weikang, Tianjin University, Tianjin, China; Pei, Yabiao, Tianjin University, Tianjin, China; Douglin, John C., Technion - Israel Institute of Technology, Haifa, Israel; Zhang, Junfeng, Tianjin University, Tianjin, China; Zhao, Haoyang, Tianjin University, Tianjin, China; Xue, Jiandang, Tianjin University, Tianjin, China; Wang, Qingfa, Tianjin University, Tianjin, China; Li, Ran, Shenzhen Intellifusion Ltd., Shenzhen, China; Qin, Yanzhou, Tianjin University, Tianjin, China; Yin, Yan, Tianjin University, Tianjin, China; Dekel, Dario R., Technion - Israel Institute of Technology, Haifa, Israel, Technion - Israel Institute of Technology, Haifa, Israel; Guiver, Michael D., Tianjin University, Tianjin, China","Recently, much work has been devoted to designing catalysts with high porosity and efficient active sites. Although very promising results are achieved using Co/Fe–N–C catalysts based on rotating disk electrode (RDE) tests, actual fuel cell performance is below expectations, probably due to insufficient understanding of the catalyst layer (CL). Therefore, catalyst design should be considered holistically by taking into account CL performance, not only intrinsic activity. Here, Co/Fe–N–C with highly dispersed CoFe nanoalloy in the carbon network is obtained by careful design of Co/Fe-ZIF precursor, resulting in a high oxygen reduction reaction (ORR) site density with good stability. Concerning RDE test in the kinetic region and single cell test (SCT) with complex influence factors, the half-cell test (HCT) is introduced to more accurately evaluate the quality of the Co/Fe–CL. Multi-scale measurements (RDE, HCT and SCT) in different current density ranges allows targeting the key CL influence factors for fuel cell performance. © 2021 Elsevier B.V.",Alloy nanocluster; Electrocatalyst; Half-cell test; Oxygen reduction reaction; Polymer electrolyte membrane fuel cells,Binary alloys; Catalyst activity; Electrocatalysts; Electrodes; Electrolytic reduction; Iron; Iron alloys; Nanoclusters; Oxygen; Polyelectrolytes; Rotating disks; Testing; Alloy nanoclusters; Catalysts layers; Electrocatalyst; Half-cell tests; Membrane fuel cells; Multi-scales; Oxygen reduction reaction; Polymer electrolyte membranes; Rotating disk electrodes; ]+ catalyst; Proton exchange membrane fuel cells (PEMFC),Alloy nanocluster;Electrocatalyst;Half-cell test;Oxygen reduction reaction;Polymer electrolyte membrane fuel cells;Binary alloys;Catalyst activity;Electrocatalysts;Electrodes;Electrolytic reduction;Iron;Iron alloys;Nanoclusters;Oxygen;Polyelectrolytes;Rotating disks;Testing;Alloy nanoclusters;Catalysts layers;Half-cell tests;Membrane fuel cells;Multi-scales;Polymer electrolyte membranes;Rotating disk electrodes;]+ catalyst;Proton exchange membrane fuel cells (PEMFC),"J. Zhang; State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300072, China; email: geosign@tju.edu.cn; D.R. Dekel; The Wolfson Department of Chemical Engineering, Technion – Israel Institute of Technology, Haifa, 3200003, Israel; email: dario@technion.ac.il",,,,,,Elsevier B.V.,09263373,,ACBEE,,English,Appl. Catal. B Environ.,Article,Scopus,,2-s2.0-85113782002,,China;Israel,tju.edu.cn,,,"Zhu, W.; Pei, Y.; Douglin, J.C.; Zhang, J.; Zhao, H.; Xue, J.; Wang, Q.; Li, R.; Qin, Y.; Yin, Y.; Dekel, D.R.; Guiver, M.D."
"Jiao, L., Zhang, R., Wan, G., Yang, W., Wan, X., Zhou, H., Shui, J., Yu, S.H., Jiang, H.L.",Nanocasting SiO2 into metal–organic frameworks imparts dual protection to high-loading Fe single-atom electrocatalysts,2020,Nature Communications,11,1,2831,,,,430,10.1038/s41467-020-16715-6,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85085998141&doi=10.1038%2Fs41467-020-16715-6&partnerID=40&md5=074e5f67a1c25493c112917b247f332e,"Department of Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Materials Science Division, Argonne National Laboratory, Lemont, IL, United States; School of Energy and Power Engineering, North China Electric Power University (Baoding), Baoding, Hebei, China; School of Materials Science and Engineering, Beihang University, Beijing, China; The Advanced Photon Source, Lemont, IL, United States","Jiao, Long, Department of Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Zhang, Rui, Department of Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Wan, Gang, Materials Science Division, Argonne National Laboratory, Lemont, IL, United States; Yang, Weijie, School of Energy and Power Engineering, North China Electric Power University (Baoding), Baoding, Hebei, China; Wan, Xin, School of Materials Science and Engineering, Beihang University, Beijing, China; Zhou, Hua, The Advanced Photon Source, Lemont, IL, United States; Shui, Jianglan, School of Materials Science and Engineering, Beihang University, Beijing, China; Yu, Shuhong, Department of Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Jiang, Hailong, Department of Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China","Single-atom catalysts (SACs) have sparked broad interest recently while the low metal loading poses a big challenge for further applications. Herein, a dual protection strategy has been developed to give high-content SACs by nanocasting SiO<inf>2</inf> into porphyrinic metal–organic frameworks (MOFs). The pyrolysis of SiO<inf>2</inf>@MOF composite affords single-atom Fe implanted N-doped porous carbon (Fe<inf>SA</inf>–N–C) with high Fe loading (3.46 wt%). The spatial isolation of Fe atoms centered in porphyrin linkers of MOF sets the first protective barrier to inhibit the Fe agglomeration during pyrolysis. The SiO<inf>2</inf> in MOF provides additional protection by creating thermally stable FeN<inf>4</inf>/SiO<inf>2</inf> interfaces. Thanks to the high-density Fe<inf>SA</inf> sites, Fe<inf>SA</inf>–N–C demonstrates excellent oxygen reduction performance in both alkaline and acidic medias. Meanwhile, Fe<inf>SA</inf>–N–C also exhibits encouraging performance in proton exchange membrane fuel cell, demonstrating great potential for practical application. More far-reaching, this work grants a general synthetic methodology toward high-content SACs (such as Fe<inf>SA</inf>, Co<inf>SA</inf>, Ni<inf>SA</inf>). © 2020, The Author(s).",,metal organic framework; silicon dioxide; catalyst; electrical method; inhibition; iron; nanotechnology; organometallic compound; performance assessment; Article; atomic emission spectrometry; crystal structure; crystallization; density functional theory; drug synthesis; elemental analysis; energy dispersive X ray spectroscopy; finite element analysis; geographic distribution; infrared spectroscopy; melting point; particle size; Raman spectrometry; scanning electron microscopy; surface property; transmission electron microscopy; X ray absorption spectroscopy; X ray diffraction; Cosa,metal organic framework;silicon dioxide;catalyst;electrical method;inhibition;iron;nanotechnology;organometallic compound;performance assessment;Article;atomic emission spectrometry;crystal structure;crystallization;density functional theory;drug synthesis;elemental analysis;energy dispersive X ray spectroscopy;finite element analysis;geographic distribution;infrared spectroscopy;melting point;particle size;Raman spectrometry;scanning electron microscopy;surface property;transmission electron microscopy;X ray absorption spectroscopy;X ray diffraction;Cosa,"H.-L. Jiang; Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Soft Matter Chemistry, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, China; email: jianglab@ustc.edu.cn",,,,,,Nature Research,,,,32504040,English,Nat. Commun.,Article,Scopus,,2-s2.0-85085998141,,China;United States,ustc.edu.cn,,,"Jiao, L.; Zhang, R.; Wan, G.; Yang, W.; Wan, X.; Zhou, H.; Shui, J.; Yu, S.-H.; Jiang, H.-L."
"Venkatesan, S., Mitzel, J., Wegner, K., Costa, R., Gazdzicki, P., Friedrich, K.A.",Nanomaterials and films for polymer electrolyte membrane fuel cells and solid oxide cells by flame spray pyrolysis,2022,RENEWABLE & SUSTAINABLE ENERGY REVIEWS,158,,112080,,,17,28,10.1016/j.rser.2022.112080,,"[Venkatesan, Suriya; Mitzel, Jens; Costa, Remi; Gazdzicki, Pawel; Friedrich, Kaspar Andreas] German Aerosp Ctr DLR, Inst Engn Thermodynam, Dept Electrochem Energy Technol, D-70569 Stuttgart, Germany; [Wegner, Karsten] Swiss Fed Inst Technol, Dept Mech & Proc Engn, Particle Technol Lab, CH-8092 Zurich, Switzerland; [Wegner, Karsten] ParteQ GmbH, Brunnenstr, D-76316 Malsch, Germany; [Friedrich, Kaspar Andreas] Univ Stuttgart, Inst Bldg Energet Thermal Engn & Energy Storage I, D-70569 Stuttgart, Germany",,"Significant progress has been achieved in the development of nanomaterials for polymer electrolyte membrane fuel cells (PEMFC) and solid oxide cells (SOC). However, the limited scalability and multi-step processing of the conventional synthesis routes for the electrocatalysts, their supports and thin functional films in general (e.g., coprecipitation and solid-state synthesis) remain a great challenge for inexpensive production of these energy materials and cells. These drawbacks could be overcome by flame spray pyrolysis (FSP), a simple, rapid, scalable and single step fabrication technique. Here, a comprehensive review on flame-based synthesis and deposition techniques with a major focus on FSP for PEMFCs and SOCs is presented. Flame-made materials of practical importance including Pt, Pt alloys, metal-nitrogen-carbon catalysts, perovskites and catalyst support structures, and their performance are discussed along with challenges and opportunities to bridge the gap between materials research and cell development.",Polymer electrolyte membrane fuel cell; Solid oxide cell; Solid oxide fuel cell; Flame spray pyrolysis; Flame synthesis; Nanomaterial; Thin-film,CHEMICAL-VAPOR-DEPOSITION; PLATINUM-GROUP METAL; ONE-STEP DEPOSITION; ULTRA-LOW; AEROSOL SYNTHESIS; CATALYST; COMBUSTION; PERFORMANCE; NANOPOWDERS; SIZE,Polymer electrolyte membrane fuel cell;Solid oxide cell;Solid oxide fuel cell;Flame spray pyrolysis;Flame synthesis;Nanomaterial;Thin-film;CHEMICAL-VAPOR-DEPOSITION;PLATINUM-GROUP METAL;ONE-STEP DEPOSITION;ULTRA-LOW;AEROSOL SYNTHESIS;CATALYST;COMBUSTION;PERFORMANCE;NANOPOWDERS;SIZE,jens.mitzel@dlr.de; andreas.friedrich@dlr.de,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,1364-0321,,,,English,RENEW SUST ENERG REV,Article,WoS,Science & Technology - Other Topics; Energy & Fuels,WOS:000784092600001,2-s2.0-85123237145,Germany;Switzerland,dlr.de,German Aerosp Ctr DLR;Swiss Fed Inst Technol;ParteQ GmbH;Univ Stuttgart,"German Aerosp Ctr DLR, Germany;Swiss Fed Inst Technol, Switzerland;ParteQ GmbH, Germany;Univ Stuttgart, Germany","Venkatesan, Suriya; Mitzel, Jens; Wegner, Karsten; Costa, Remi; Gazdzicki, Pawel; Friedrich, Kaspar Andreas"
"Xue, J., Li, Y., Hu, J.",Nanoporous bimetallic Zn/Fe-N-C for efficient oxygen reduction in acidic and alkaline media,2020,Journal of Materials Chemistry A,8,15,,7145,7157,,106,10.1039/c9ta13471a,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85083374204&doi=10.1039%2Fc9ta13471a&partnerID=40&md5=263257a4abc4aceb5225ada9bbe55251,"School of Energy and Power Engineering, Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, Xi'an, Shaanxi, China; Faculty of Science, Kunming University of Science and Technology, Kunming, Yunnan, China","Xue, Jinling, School of Energy and Power Engineering, Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, Xi'an, Shaanxi, China; Li, Yinshi, School of Energy and Power Engineering, Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, Xi'an, Shaanxi, China; Hu, Jue, Faculty of Science, Kunming University of Science and Technology, Kunming, Yunnan, China","It remains a major challenge to develop a facile method to prepare non-noble metal electrocatalysts with high activity and durability to drive the sluggish oxygen reduction reaction (ORR) for proton exchange membrane fuel cells (PEMFCs). Herein, a highly efficient bimetallic Zn/Fe@N-doped hierarchical porous carbon (Zn/Fe-N-C) catalyst derived from ZIF-8 and hemin (host-guest) was firstly reported by one-step thermal treatment. Fe2+ spatially separated by using the hemin guest in the ZIF-8 framework and hydrocarbon-branched chains form rich Fe-N<inf>x</inf> active sites, and the evaporation of Zn2+ generates a highly porous structure in the Zn/Fe-N-C catalysts. Benefitting from this unique structure and composition, the resulting Zn/Fe<inf>2</inf>-N-C catalyst exhibits excellent ORR activities in both 0.1 M KOH (onset potential, E<inf>onset</inf> = 1.08 V, and half-wave potential, E<inf>1/2</inf> = 0.86 V vs. RHE) and 0.5 M H<inf>2</inf>SO<inf>4</inf> media (E<inf>onset</inf> = 1.04 V and E<inf>1/2</inf> = 0.81 V), which are even comparable to those of the commercial Pt/C catalyst, and ranks among the top reported electrocatalysts. In addition, it also has outstanding long-term durability and good methanol resistance, much better than those of Pt/C in both acidic and alkaline media, which makes it one of the best non-noble alternatives of Pt-based catalysts for ORR electrocatalysis. This work highlights the potential to rationally design and fabricate high-performance ORR catalysts for fuel cell applications. This journal is © The Royal Society of Chemistry.",,Catalyst activity; Doping (additives); Durability; Electrocatalysis; Electrocatalysts; Electrolytic reduction; Iron compounds; Oxygen; Oxygen reduction reaction; Porous materials; Potassium hydroxide; Precious metals; Zinc compounds; Fuel cell application; Half-wave potential; Hierarchical porous carbons; Long term durability; Oxygen Reduction; Porous structures; Proton exchange membrane fuel cell (PEMFCs); Pt-based catalyst; Proton exchange membrane fuel cells (PEMFC),Catalyst activity;Doping (additives);Durability;Electrocatalysis;Electrocatalysts;Electrolytic reduction;Iron compounds;Oxygen;Oxygen reduction reaction;Porous materials;Potassium hydroxide;Precious metals;Zinc compounds;Fuel cell application;Half-wave potential;Hierarchical porous carbons;Long term durability;Oxygen Reduction;Porous structures;Proton exchange membrane fuel cell (PEMFCs);Pt-based catalyst;Proton exchange membrane fuel cells (PEMFC),"Y. Li; Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an Shaanxi, 710049, China; email: ysli@mail.xjtu.edu.cn",,,,,,Royal Society of Chemistry,20507488,,JMCAE,,English,J. Mater. Chem. A,Article,Scopus,,2-s2.0-85083374204,,China,mail.xjtu.edu.cn,,,"Xue, J.; Li, Y.; Hu, J."
"Wang, X.X., Zou, B., Du, X.X., Wang, J.N.",N-doped carbon nanocages with high catalytic activity and durability for oxygen reduction,2015,JOURNAL OF MATERIALS CHEMISTRY A,3,23,,12427,12435,9,26,10.1039/c5ta02009c,,"[Wang, Xiao Xia; Zou, Biao; Du, Xin Xin; Wang, Jian Nong] E China Univ Sci & Technol, Sch Mech & Power Engn, Nanomat Res Ctr, Shanghai 200237, Peoples R China",,"The development of a carbon based non-precious metal catalyst for oxygen reduction reaction (ORR) is of paramount importance for the essential implementation of both proton exchange membrane fuel cells and metal-air batteries. In this work, we report a feasible strategy to synthesize N-doped carbon nanocages (NCNC) with high activity and durability. This is achieved by the pyrolysis of pyridine and iron carbonyl and subsequent heat treatment in the presence of NH4Cl. Based on detailed studies on the pore structure, the type and transformation of nitrogen-related functional groups, we find that the sample after heat treatment with NH4Cl has a high specific surface area up to 1093 m(2) g(-1). Also, the sample with high graphitic N doping possesses much better ORR catalytic activity than those dominated by pyridinic and pyrrolic N. The half-wave potential for the final NCNC catalyst is only 40 mV less than a commercial Pt/C catalyst at the initial stage. But the NCNC catalyst shows much better durability than the Pt/C catalyst in acidic electrolytes, and thus provides a new opportunity for Pt replacement.",,HIGH ELECTROCATALYTIC ACTIVITY; METAL-FREE ELECTROCATALYSTS; GRAPHENE; NANOPARTICLES; ARRAYS; IRON,HIGH ELECTROCATALYTIC ACTIVITY;METAL-FREE ELECTROCATALYSTS;GRAPHENE;NANOPARTICLES;ARRAYS;IRON,jnwang@ecust.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000355736700039,2-s2.0-84930945251,China,ecust.edu.cn,E China Univ Sci & Technol,"E China Univ Sci & Technol, China","Wang, Xiao Xia; Zou, Biao; Du, Xin Xin; Wang, Jian Nong"
"Shui, J., Wang, M., Du, F., Dai, L.",N-doped carbon nanomaterials are durable catalysts for oxygen reduction reaction in acidic fuel cells,2015,Science Advances,1,1,e1400129,,,,529,10.1126/sciadv.1400129,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85037861214&doi=10.1126%2Fsciadv.1400129&partnerID=40&md5=a5736c193a36b960b3173c470b255425,"Center of Advanced Science and Engineering for Carbon (Case4Carbon), Case School of Engineering, Cleveland, OH, United States","Shui, Jianglan, Center of Advanced Science and Engineering for Carbon (Case4Carbon), Case School of Engineering, Cleveland, OH, United States; Wang, Min, Center of Advanced Science and Engineering for Carbon (Case4Carbon), Case School of Engineering, Cleveland, OH, United States; Du, Feng, Center of Advanced Science and Engineering for Carbon (Case4Carbon), Case School of Engineering, Cleveland, OH, United States; Dai, Liming, Center of Advanced Science and Engineering for Carbon (Case4Carbon), Case School of Engineering, Cleveland, OH, United States","The availability of low-cost, efficient, and durable catalysts for oxygen reduction reaction (ORR) is a prerequisite for commercialization of the fuel cell technology. Along with intensive research efforts of more than half a century in developing nonprecious metal catalysts (NPMCs) to replace the expensive and scarce platinum-based catalysts, a new class of carbon-based, low-cost, metal-free ORR catalysts was demonstrated to show superior ORR performance to commercial platinum catalysts, particularly in alkaline electrolytes. However, their large-scale practical application in more popular acidic polymer electrolyte membrane (PEM) fuel cells remained elusive because they are often found to be less effective in acidic electrolytes, and no attempt has been made for a single PEM cell test. We demonstrated that rationally designed,metal-free, nitrogen-doped carbon nanotubes and their graphene composites exhibited significantly better long-term operational stabilities and comparable gravimetric power densities with respect to the best NPMC in acidic PEM cells. This work represents a major breakthrough in removing the bottlenecks to translate lowcost, metal-free, carbon-based ORR catalysts to commercial reality, and opens avenues for clean energy generation from affordable and durable fuel cells. © 2015 The Authors.",,Catalysts; Doping (additives); Electrolytes; Electrolytic reduction; Fuel cells; Gas fuel purification; Metals; Platinum; Platinum metals; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Yarn; Alkaline electrolytes; Clean energy generation; Fuel cell technologies; Gravimetric power density; Nitrogen doped carbon nanotubes; Non-precious metal catalysts; Oxygen reduction reaction; Platinum based catalyst; Solid electrolytes,Catalysts;Doping (additives);Electrolytes;Electrolytic reduction;Fuel cells;Gas fuel purification;Metals;Platinum;Platinum metals;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Yarn;Alkaline electrolytes;Clean energy generation;Fuel cell technologies;Gravimetric power density;Nitrogen doped carbon nanotubes;Non-precious metal catalysts;Oxygen reduction reaction;Platinum based catalyst;Solid electrolytes,"L. Dai; Center of Advanced Science and Engineering for Carbon (Case4Carbon), Department of Macromolecular Science Engineering, Case School of Engineering, Case Western Reserve University, Cleveland, 10900 Euclid Avenue, 44106, United States; email: liming.dai@case.edu",,,,,,American Association for the Advancement of Science,,,,,English,Sci. Adv.,Article,Scopus,,2-s2.0-85037861214,,United States,case.edu,,,"Shui, J.; Wang, M.; Du, F.; Dai, L."
"Alvarez-Manuel, L., Alegre, C., Sebastian, D., Eizaguerri, A., Napal, P.F., Lazaro Elorri, M.J.",N-doped carbon xerogels from urea-resorcinol-formaldehyde as carbon matrix for Fe-N-C catalysts for oxygen reduction in fuel cells,2023,Catalysis Today,418,,114067,,,,15,10.1016/j.cattod.2023.114067,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85150833311&doi=10.1016%2Fj.cattod.2023.114067&partnerID=40&md5=c9eaa5fc08c78a9ee8bb2cc03b250959,"CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain","Álvarez-Manuel, Laura, CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Alegre, Cinthia, CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Sebastián, D., CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Eizaguerri, Alberto, CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Napal, Pedro Francisco, CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Lázaro Elorri, María Jesús, CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain","Platinum group metal-free catalysts have been intensively investigated in the last decades as an alternative to platinum with the aim of lowering the cost of polymer electrolyte fuel cells. In particular, iron-nitrogen-carbon (Fe-N-C) has proved to be the most active towards the oxygen reduction reaction. For practical application, a hierarchical pore structure is required, with micropores favouring the creation of active sites and larger pores (meso- and macropores) facilitating the mass transport. In this work, carbon xerogels are investigated to hosting iron and nitrogen species obtained by a template-free method. The introduction of nitrogen in a one-step polymerization of urea with resorcinol and formaldehyde is investigated for the first time in this field by varying the relative content of reactants. The urea/resorcinol ratio greatly influences the pore structure of the Fe-N-C catalyst and the ORR electrocatalytic activity thereof. The ORR activity is favored for a balanced urea/resorcinol ratio where porosity is well developed and relatively high iron and nitrogen contents are incorporated to the carbon xerogel. In acid (0.5 M H<inf>2</inf>SO<inf>4</inf>), the onset potential is 0.82 V vs. RHE, with a number of exchanged electrons very close to 4 (i.e. full conversion to water) and low Tafel slope of 71 mV dec−1, for the most active catalyst of the series, possessing the best compromise of iron and nitrogen active sites. Fuel cell tests corroborate that the catalyst with the most developed porous structure shows the best performance. © 2023 The Authors",Fe-N-C catalysts; Fuel cells; Hierarchical porosity; N-doped carbon xerogels; Oxygen reduction reaction; Urea,Catalyst activity; Doping (additives); Electrolytic reduction; Formaldehyde; Graphite; Iron; Iron compounds; Metabolism; Nitrogen; Oxygen; Phenols; Platinum; Polyelectrolytes; Pore structure; Porosity; Proton exchange membrane fuel cells (PEMFC); Active site; Carbon xerogels; Doped carbons; Fe-N-C catalyst; Hierarchical porosity; N-doped; N-doped carbon xerogel; Oxygen reduction reaction; Resorcinol formaldehydes; ]+ catalyst; Urea,Fe-N-C catalysts;Fuel cells;Hierarchical porosity;N-doped carbon xerogels;Oxygen reduction reaction;Urea;Catalyst activity;Doping (additives);Electrolytic reduction;Formaldehyde;Graphite;Iron;Iron compounds;Metabolism;Nitrogen;Oxygen;Phenols;Platinum;Polyelectrolytes;Pore structure;Porosity;Proton exchange membrane fuel cells (PEMFC);Active site;Carbon xerogels;Doped carbons;Fe-N-C catalyst;N-doped;N-doped carbon xerogel;Resorcinol formaldehydes;]+ catalyst,"C. Alegre; Instituto de Carboquímica, CSIC, Zaragoza, C/Miguel Luesma Castán 4, 50018, Spain; email: cinthia@icb.csic.es",,,,,,Elsevier B.V.,09205861,,CATTE,,English,Catal Today,Article,Scopus,,2-s2.0-85150833311,,Spain,icb.csic.es,,,"Alvarez-Manuel, L.; Alegre, C.; Sebastian, D.; Eizaguerri, A.; Napal, P.F.; Lazaro Elorri, M.J."
"Liu, D.J., Goenaga, G., Ma, S.Q., Yuan, S.W., Shui, J.L.",NEW APPROACHES TO NON-PGM CATALYSTS THROUGH RATIONAL DESIGN,2011,FUEL CELL SEMINAR 2010,30,1,,97,104,8,4,10.1149/1.3562464,,"[Liu, Di-Jia; Goenaga, Gabriel; Ma, Shengqian; Yuan, Shengwen; Shui, Jianglan] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA",,"The catalytic oxygen reduction reaction (ORR) at the cathode represents the rate-limiting step in the overall electrocatalytic process inside of a proton exchange membrane fuel cell (PEMFC). The platinum group metals (PGMs) are current materials of choice for the cathode catalyst. Their high costs and limited reserves pose a significant challenge in implementing PEMFC for broad base commercial application. In this report, we discuss some of our recent activities in developing non-PGM electrocatalysts using rational design and synthesis approach. A variety of porous organic materials were developed as the catalyst precursors for the preparation of ORR catalysts with high surface area and active site density free of additional carbon support. Electrocatalytic activity and physical property of the new catalysts were investigated by various techniques in an attempt to understand the process of the active site formation.",,ALIGNED CARBON NANOTUBES; FUEL-CELL CATHODE; REDUCTION; OXYGEN,ALIGNED CARBON NANOTUBES;FUEL-CELL CATHODE;REDUCTION;OXYGEN,djliu@anl.gov,"Williams, MC; Garland, N","65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA",Fuel Cell Seminar and Exposition,"San Antonio, TX","OCT 18-21, 2010",ELECTROCHEMICAL SOC INC,1938-5862,978-1-56677-883-1,,,English,ECS TRANSACTIONS,Proceedings Paper,WoS,Electrochemistry; Energy & Fuels,WOS:000309358700011,2-s2.0-79959681938,United States,anl.gov,Argonne Natl Lab,"Argonne Natl Lab, United States","Liu, Di-Jia; Goenaga, Gabriel; Ma, Shengqian; Yuan, Shengwen; Shui, Jianglan"
"Yuan, S., Goenaga, G., Grabstanowicz, L., Shui, J., Chen, C., Commet, S., Reprogle, B., Liu, D.J.",New Approach to High-Efficiency Non-PGM Catalysts Using Rationally Designed Porous Organic Polymers,2013,POLYMER ELECTROLYTE FUEL CELLS 13 (PEFC 13),58,1,,1671,1680,10,2,10.1149/05801.1671ecst,,"[Yuan, S.; Goenaga, G.; Grabstanowicz, L.; Shui, J.; Chen, C.; Commet, S.; Reprogle, B.; Liu, D. -J.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA",,"To replace the current Pt/C catalyst with low- or non-PGM materials represents a critical technology challenge for commercialization of the proton exchange membrane fuel cell. To compete with the precious metal based catalyst, the non-PGM material must have higher active site density and improved turnover- frequency. In this report, we discuss a new method of preparing ""support-free"" non-PGM catalysts produced by using the transition metal decorated porous organic polymers as precursors. The new approach has led to formation of catalysts with high efficiency towards the oxygen reduction reaction, tested in the oxygen saturated acidic electrolyte and under actual fuel cell operating condition.",,IRON; ELECTROCATALYSTS,IRON;ELECTROCATALYSTS,djliu@anl.gov,"Gasteiger, HA; Weber, A; Shinohara, K; Uchida, H; Mitsushima, S; Schmidt, TJ; Narayanan, SR; Ramani, V; Fuller, T; Edmundson, M; Strasser, P; Mantz, R; Fenton, J; Buchi, FN; Hansen, DC; Jones, DL; Coutanceau, C; SwiderLyons, K; Perry, KA","65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA",13th Polymer Electrolyte Fuel Cell Symposium (PEFC),"San Francisco, CA","OCT 27-NOV 01, 2013",ELECTROCHEMICAL SOC INC,1938-5862,978-1-60768-446-6; 978-1-60768-445-9,,,English,ECS TRANSACTIONS,Proceedings Paper,WoS,Electrochemistry; Energy & Fuels,WOS:000354475600165,2-s2.0-84905028969,United States,anl.gov,Argonne Natl Lab,"Argonne Natl Lab, United States","Yuan, S.; Goenaga, G.; Grabstanowicz, L.; Shui, J.; Chen, C.; Commet, S.; Reprogle, B.; Liu, D. -J."
"Gao, Y.Y., Hou, M., Qi, M.M., He, L., Chen, H.P., Luo, W.Z., Shao, Z.G.",New insight into effect of potential on degradation of Fe-N-C catalyst for ORR,2021,FRONTIERS IN ENERGY,15,2,,421,430,10,18,10.1007/s11708-021-0727-2,,"[Gao, Yanyan; Hou, Ming; Qi, Manman; He, Liang; Chen, Haiping; Luo, Wenzhe; Shao, Zhigang] Chinese Acad Sci, Dalian Inst Chem Phys, Fuel Cell Syst & Engn Lab, Key Lab Fuel Cells & Hybrid Power Sources, Dalian 116023, Peoples R China; [Gao, Yanyan; Qi, Manman; He, Liang; Chen, Haiping; Luo, Wenzhe] Univ Chinese Acad Sci, Beijing, Beijing, Peoples R China",,"In recent years, Fe-N-C catalyst is particularly attractive due to its high oxygen reduction reaction (ORR) activity and low cost for proton exchange membrane fuel cells (PEMFCs). However, the durability problems still pose challenge to the application of Fe-N-C catalyst. Although considerable work has been done to investigate the degradation mechanisms of Fe-N-C catalyst, most of them are simply focused on the active-site decay, the carbon oxidation, and the demetalation problems. In fact, the 2e(-) pathway in the ORR process of Fe-N-C catalyst would result in the formation of H2O2, which is proved to be a key degradation source. In this paper, a new insight into the effect of potential on degradation of Fe-N-C catalyst was provided by quantifying the H2O2 intermediate. In this case, stability tests were conducted by the potential-static method in O-2 saturated 0.1 mol/L HClO4. During the tests, H2O2 was quantified by rotating ring disk electrode (RRDE). The results show that compared with the loading voltage of 0.4 V, 0.8 V, and 1.0 V, the catalysts being kept at 0.6 V exhibit a highest H2O2 yield. It is found that it is the combined effect of electrochemical oxidation and chemical oxidation (by aggressive radicals like H2O2/radicals) that triggered the highest H2O2 release rate, with the latter as the major cause.",proton exchange membrane fuel cells (PEMFCs); oxygen reduction reaction (ORR); Fe-N-C catalyst; potential; H2O2; degradation,,proton exchange membrane fuel cells (PEMFCs);oxygen reduction reaction (ORR);Fe-N-C catalyst;potential;H2O2;degradation,houming@dicp.ac.cn; zhgshao@dicp.ac.cn,,"CHAOYANG DIST, 4, HUIXINDONGJIE, FUSHENG BLDG, BEIJING 100029, PEOPLES R CHINA",,,,HIGHER EDUCATION PRESS,2095-1701,,,,English,FRONT ENERGY,Article,WoS,Energy & Fuels,WOS:000623725300001,2-s2.0-85101798695,China,dicp.ac.cn,Chinese Acad Sci;Univ Chinese Acad Sci,"Chinese Acad Sci, China;Univ Chinese Acad Sci, China","Gao, Yanyan; Hou, Ming; Qi, Manman; He, Liang; Chen, Haiping; Luo, Wenzhe; Shao, Zhigang"
"Kramm, U.I., Abs-Wurmbach, I., Fiechter, S., Herrmann, I., Radnik, J., Bogdanoff, P.",New Insight into the Nature of Catalytic Activity of Pyrolysed Iron Porphyrin Based Electro-Catalysts for the Oxygen Reduction Reaction (ORR) in Acidic Media,2009,PROTON EXCHANGE MEMBRANE FUEL CELLS 9,25,1,,93,104,12,19,10.1149/1.3210562,,"[Kramm (nee Koslowski), U. I.; Fiechter, S.; Herrmann, I.; Bogdanoff, P.] Helmholtz Zentrum Berlin Mat & Energie, Lise Meitner Campus,Glienicker Str 100, D-14109 Berlin, Germany; [Abs-Wurmbach, I.] Tech Univ Berlin, Fac 4, D-13353 Berlin, Germany; [Radnik, J.] Univ Rostock, D-12489 Berlin, Germany",,"In this contribution, catalysts, prepared by an impregnation technique have been characterized structurally and chemically via Fe-57 Mossbauer spectroscopy, X-ray photoelectron spectroscopy (XPS) and by elemental analysis, respectively. On the basis of the structural characterization it was concluded that those FeN4 centres in which iron is mesomericly bonded to four nitrogen atoms, are catalyzing the ORR. Furthermore, XPS as well as Mossbauer spectroscopy revealed that with increasing pyrolysis temperature the electron density at iron atoms was increased while that of the coordinating nitrogen atoms was reduced. This behaviour was connected with a decreased electric field gradient (EFG) as estimated by quadrupole splitting. The smaller EFG is interpreted in terms of a larger iron-nitrogen-bond distance and/or a slight movement of iron out of plane. We propose that this characteristic of the centres is one parameter that enables the higher turn-over frequency during ORR of pyrolysed porphyrins.",,PEM FUEL-CELLS; HIGH-AREA CARBON; CATHODIC REDUCTION; MOSSBAUER-SPECTRA; ELECTROCATALYSTS; METALLOPORPHYRINS; MACROCYCLES; RELAXATION; COMPLEXES; FE/N/C,PEM FUEL-CELLS;HIGH-AREA CARBON;CATHODIC REDUCTION;MOSSBAUER-SPECTRA;ELECTROCATALYSTS;METALLOPORPHYRINS;MACROCYCLES;RELAXATION;COMPLEXES;FE/N/C,,"Fuller, T; Uchida, H; Strasser, P; Shirvanian, P; Lamy, C; Hartnig, C; Gasteiger, HA; Zawodzinski, T; Jarvi, T; Bele, P; Ramani, V; Cleghorn, S; Jones, D; Zelenay, P","65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA",9th Proton Exchange Membrane Fuel Cell Symposium (PEMFC) Conducted Under the Auspices of the 216th Meeting of the Electrochemical-Society-Inc,"Vienna, AUSTRIA","OCT 04-09, 2009",ELECTROCHEMICAL SOC INC,1938-5862,978-1-60768-088-8,,,English,ECS TRANSACTIONS,Proceedings Paper,WoS,Electrochemistry; Energy & Fuels,WOS:000329585500009,,Germany,No email,Helmholtz Zentrum Berlin Mat & Energie;Tech Univ Berlin;Univ Rostock,"Helmholtz Zentrum Berlin Mat & Energie, Germany;Tech Univ Berlin, Germany;Univ Rostock, Germany","Kramm (nee Koslowski), U. I.; Abs-Wurmbach, I.; Fiechter, S.; Herrmann, I.; Radnik, J.; Bogdanoff, P."
"Zhou, L., Li, Y., Chen, X., Yang, Z., Yang, S., Wang, Q., Liu, X.Y., Lu, S.",New insights into degradation of Fe-N-C catalyst layers: ionomer decomposition,2022,Journal of Materials Chemistry A,10,38,,20323,20330,,9,10.1039/d2ta03669j,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85138804166&doi=10.1039%2Fd2ta03669j&partnerID=40&md5=0e48f3ada85021fa3f4870d23de54370,"Beihang University, Beijing, China; Department of Automotive Engineering, Beihang University, Beijing, China; Wenzhou University, Wenzhou, Zhejiang, China; Department of Chemistry, Tsinghua University, Beijing, China","Zhou, Lu, Department of Automotive Engineering, Beihang University, Beijing, China; Li, Yunqi, Beihang University, Beijing, China; Chen, Xiran, Department of Automotive Engineering, Beihang University, Beijing, China; Yang, Zhi, Wenzhou University, Wenzhou, Zhejiang, China; Yang, Shuo, Wenzhou University, Wenzhou, Zhejiang, China; Wang, Qian, Department of Automotive Engineering, Beihang University, Beijing, China; Liu, Xinying, Department of Chemistry, Tsinghua University, Beijing, China; Lu, Shanfu, Beihang University, Beijing, China","Fe-N-C catalysts can be used as a substitute for expensive and scarce platinum-based catalysts in proton exchange membrane fuel cells (PEMFCs). However, the durability of MEAs worsens as the performance loss increases after the first few hours of operation. To gain better insight into the degradation mechanism, a cesium salt of phosphotungstic acid is employed as a proton conductor to replace the Nafion ionomer in MEAs. The experimental data reveals improved performance stability. Except for degradation of the catalyst itself, the faster growth of proton resistance of MEAs confirms the degradation of solid electrolyte Nafion as the primary reason leading to fast performance degradation. By contrast, changes in the structure and morphology of the cathode catalyst layer (CCL) are not the primary reasons for the performance degradation of the Fe-N-C MEA. Furthermore, the 19F NMR peak assigned to a SCF<inf>2</inf>-linked SO<inf>3</inf>H group decreases by about 20%, providing direct evidence for the deactivation of the Nafion ionomer. The quantitative results provide a better in situ understanding of the fast degradation of the Fe-N-C based CCL attributed to the decomposition of the Nafion ionomer. In sum, these data look promising for future optimization of CCLs to match the commercialized requirement of the Fe-N-C MEA. © 2022 The Royal Society of Chemistry.",,Degradation; Ionomers; Iron compounds; More electric aircraft; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Catalysts layers; Cathode catalyst layers; Cesium salts; Degradation mechanism; Nafion ionomers; Performance degradation; Performance loss; Platinum based catalyst; Proton-exchange membranes fuel cells; ]+ catalyst; Catalysts,Degradation;Ionomers;Iron compounds;More electric aircraft;Proton exchange membrane fuel cells (PEMFC);Solid electrolytes;Catalysts layers;Cathode catalyst layers;Cesium salts;Degradation mechanism;Nafion ionomers;Performance degradation;Performance loss;Platinum based catalyst;Proton-exchange membranes fuel cells;]+ catalyst;Catalysts,"Y. Li; Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space and Environment, Beihang University, Beijing, 100191, China; email: yunqi_li@buaa.edu.cn; S. Lu; Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space and Environment, Beihang University, Beijing, 100191, China; email: lusf@buaa.edu.cn",,,,,,Royal Society of Chemistry,20507488,,JMCAE,,English,J. Mater. Chem. A,Article,Scopus,,2-s2.0-85138804166,,China,buaa.edu.cn,,,"Zhou, L.; Li, Y.; Chen, X.; Yang, Z.; Yang, S.; Wang, Q.; Liu, X.-Y.; Lu, S."
"Banham, D., Kishimoto, T., Sato, T., Kobayashi, Y., Narizuka, K., Ozaki, J.I., Zhou, Y., Marquez, E., Bai, K., Ye, S.",New insights into non-precious metal catalyst layer designs for proton exchange membrane fuel cells: Improving performance and stability,2017,JOURNAL OF POWER SOURCES,344,,,39,45,7,53,10.1016/j.jpowsour.2017.01.086,,"[Banham, Dustin; Zhou, Yingjie; Marquez, Emil; Bai, Kyoung; Ye, Siyu] Ballard Power Syst, 9000 Glenlyon Pkwy, Burnaby, BC V5J 5J8, Canada; [Kishimoto, Talceaki; Sato, Tetsutaro; Kobayashi, Yoshikazu; Narizuka, Kumi] Gunma Univ, Grad Sch Sci & Technol, Div Environm Engn Sci, I-5-1 Tenjin cho, Kiryu, Gunma 3768515, Japan; [Ozaki, Jun-Ichi] Nisshinbo Holdings Inc, Business Dev Dept, 1-2-3 Onodai, Chiba 2670056, Japan",,"The activity of non-precious metal catalysts (NPMCs) has now reached a stage at which they can be considered as possible alternatives to Pt for some proton exchange membrane fuel cell (PEMFC) applications. However, despite significant efforts over the past 50 years on catalyst development, only limited studies have been performed on NPMC-based cathode catalyst layer (CCL) designs. In this work, an extensive ionomer study is performed to investigate the impact of ionomer equivalent weight on performance, which has uncovered two crucial findings. Firstly, it is demonstrated that beyond a critical CCL conductance, no further improvement in performance is observed. The procedure used to determine this critical conductance can be used by other researchers in this field to aid in their design of high performing NPMC-based CCLs. Secondly, it is shown that the stability of NPMC-based CCLs can be improved through the use of low equivalent weight ionomers. This represents a completely unexplored pathway for further stability improvements, and also provides new insights into the possible degradation mechanisms occurring in NPMC-based CCLs. These findings have broad implications on all future NPMC-based CCL designs. (C) 2017 Elsevier B.V. All rights reserved.",Fuel cell; Non precious metal catalyst; Stability; Oxygen reduction reaction,OXYGEN REDUCTION REACTION; N-C CATALYSTS; CATHODE CATALYST; IONOMER DEGRADATION; DURABILITY; FE/N/C; ELECTROREDUCTION; IMPACT,Fuel cell;Non precious metal catalyst;Stability;Oxygen reduction reaction;N-C CATALYSTS;CATHODE CATALYST;IONOMER DEGRADATION;DURABILITY;FE/N/C;ELECTROREDUCTION;IMPACT,dustin.banham@ballard.com,,"PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS",,,,ELSEVIER SCIENCE BV,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:000395956300006,2-s2.0-85010905710,Canada;Japan,ballard.com,Ballard Power Syst;Gunma Univ;Nisshinbo Holdings Inc,"Ballard Power Syst, Canada;Gunma Univ, Japan;Nisshinbo Holdings Inc, Japan","Banham, Dustin; Kishimoto, Talceaki; Sato, Tetsutaro; Kobayashi, Yoshikazu; Narizuka, Kumi; Ozaki, Jun-Ichi; Zhou, Yingjie; Marquez, Emil; Bai, Kyoung; Ye, Siyu"
"Voloshin, Y.Z., Buznik, V.M., Dedov, A.G.",New types of the hybrid functional materials based on cage metal complexes for (electro) catalytic hydrogen production,2020,Pure and Applied Chemistry,92,7,,1159,1174,,22,10.1515/pac-2019-1105,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85078085798&doi=10.1515%2Fpac-2019-1105&partnerID=40&md5=c107e61d9f87523f72d36c2857e1ed1a,"National University of Oil and Gas «Gubkin University», Moscow, Russian Federation; Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russian Federation; A.N.Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Moscow, Russian Federation; A.V.Topchiev Institute of Petrochemical Synthesis, RAS, Moscow, Russian Federation","Voloshin, Yan Z., National University of Oil and Gas «Gubkin University», Moscow, Russian Federation, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russian Federation, A.N.Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Moscow, Russian Federation; Buznik, V. M., National University of Oil and Gas «Gubkin University», Moscow, Russian Federation; Dedov, Alexey G., National University of Oil and Gas «Gubkin University», Moscow, Russian Federation, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russian Federation, A.V.Topchiev Institute of Petrochemical Synthesis, RAS, Moscow, Russian Federation","Successful using of cage metal complexes (clathrochelates) and the functional hybrid materials based on them as promising electro- and (pre)catalysts for hydrogen and syngas production is highlighted in this microreview. The designed polyaromatic-terminated iron, cobalt and ruthenium clathrochelates, adsorbed on carbon materials, were found to be the efficient electrocatalysts of the hydrogen evolution reaction (HER), including those in polymer electrolyte membrane (PEM) water electrolysers. The clathrochelate-electrocatalayzed performances of HER 2H+/H2 in these semi-industrial electrolysers are encouraging being similar to those for the best known to date molecular catalysts and for the promising non-platinum solid-state HER electrocatalysts as well. Electrocatalytic activity of the above clathrochelates was found to be affected by the number of the terminal polyaromatic group(s) per a clathrochelate molecule and the lowest Tafel slopes were obtained with hexaphenanthrene macrobicyclic complexes. The use of suitable carbon materials of a high surface area, as the substrates for their efficient immobilization, allowed to substantially increase an electrocatalytic activity of the corresponding clathrochelate-containing carbon paper-based cathodes. In the case of the reaction of dry reforming of methane (DRM) into syngas of a stoichiometry CO/H2 1:1, the designed metal(II) clathrochelates with terminal polar groups are only the precursors (precatalysts) of single atom catalysts, where each of their catalytically active single sites is included in a matrix of its former encapsulating ligand. Choice of their designed ligands allowed an efficient immobilization of the corresponding cage metal complexes on the surface of a given highly porous ceramic material as a substrate and caused increasing of a surface concentration of the catalytically active centers (and, therefore, that of the catalytic activity of hybrid materials modified with these clathrochelates). Thus designed cage metal complexes and hybrid materials based on them operate under the principals of ""green chemistry""and can be considered as efficient alternatives to some classical inorganic and molecular (pre)catalysts of these industrial processes. © 2020 IUPAC & De Gruyter. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. For more information, please visit: http://creativecommons.org/licenses/by-nc-nd/4.0/ 2020.",Carbon materials; Catalytic reactions; Ceramic materials; Clathrochelates; Electrocatalysis; Electrolysis; Hydrogen energy; Hydrogen production; Mendeleev-21; Methane; oxidative conversion; Photocatalysis; Syngas production,Carbon; Catalyst activity; Electrocatalysis; Electrocatalysts; Electrolysis; Functional materials; Hybrid materials; Ligands; Metal complexes; Metals; Methane; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Substrates; Synthesis gas; Carbon material; Catalytic reactions; Clathrochelates; Hydrogen Energy; Hydrogen evolution reactions; Material-based; Mendeleev-21; Oxidative conversion; Syngas production; ]+ catalyst; Hydrogen production,Carbon materials;Catalytic reactions;Ceramic materials;Clathrochelates;Electrocatalysis;Electrolysis;Hydrogen energy;Hydrogen production;Mendeleev-21;Methane;oxidative conversion;Photocatalysis;Syngas production;Carbon;Catalyst activity;Electrocatalysts;Functional materials;Hybrid materials;Ligands;Metal complexes;Metals;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Substrates;Synthesis gas;Carbon material;Hydrogen evolution reactions;Material-based;]+ catalyst,"Y.Z. Voloshin; Gubkin Russian State University of Oil and Gas (National Research University), Moscow, 119991, Russian Federation; email: voloshin@ineos.ac.ru",,,,,,De Gruyter Open Ltd,00334545,,PACHA,,English,Pure Appl. Chem.,Article,Scopus,,2-s2.0-85078085798,,Russian Federation,ineos.ac.ru,,,"Voloshin, Y.Z.; Buznik, V.M.; Dedov, A.G."
"Remmel, A.L., Ratso, S., Divitini, G., Danilson, M., Mikli, V., Uibu, M., Aruvali, J., Kruusenberg, I.",Nickel and Nitrogen-Doped Bifunctional ORR and HER Electrocatalysts Derived from CO2,2022,ACS Sustainable Chemistry and Engineering,10,1,,134,145,,26,10.1021/acssuschemeng.1c05250,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85121928579&doi=10.1021%2Facssuschemeng.1c05250&partnerID=40&md5=427fbf9da8dff94cfa56e18662125866,"National Institute of Chemical Physics and Biophysics, Tallinn, Tallinn, Harjumaa, Estonia; Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, Cambridgeshire, United Kingdom; Department of Materials and Environmental Technology, Tallinna Tehnikaülikool, Tallinn, Harjumaa, Estonia; Ökoloogia ja Maateaduste Instituut, Tartu, Tartumaa, Estonia","Remmel, Anna Liis, National Institute of Chemical Physics and Biophysics, Tallinn, Tallinn, Harjumaa, Estonia; Ratso, Sander, National Institute of Chemical Physics and Biophysics, Tallinn, Tallinn, Harjumaa, Estonia; Divitini, Giorgio, Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, Cambridgeshire, United Kingdom; Danilson, Mati, Department of Materials and Environmental Technology, Tallinna Tehnikaülikool, Tallinn, Harjumaa, Estonia; Mikli, Valdek, Department of Materials and Environmental Technology, Tallinna Tehnikaülikool, Tallinn, Harjumaa, Estonia; Uibu, Mai, Department of Materials and Environmental Technology, Tallinna Tehnikaülikool, Tallinn, Harjumaa, Estonia; Aruväli, Jaan, Ökoloogia ja Maateaduste Instituut, Tartu, Tartumaa, Estonia; Kruusenberg, Ivar, National Institute of Chemical Physics and Biophysics, Tallinn, Tallinn, Harjumaa, Estonia","While nonprecious metal catalysts (NPMCs) have been shown to be viable alternatives for Pt-based catalyst materials in both proton exchange membrane fuel cells (PEMFCs) and electrolyzers, all of the synthesis methods of these materials still have a positive carbon footprint. This means that, while the production of CO2 is avoided by converting to a hydrogen economy, a large amount of CO2 must be produced to drive this transition (as much as 600 kg of CO2 per kilogram of catalyst for CVD-based materials). Here, we demonstrate, for the first time, a sustainable method for synthesizing a bifunctional oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) catalyst directly from CO2 in a process that captures carbon dioxide from the atmosphere or flue gases instead of producing it as all previous methods for creating ORR/HER catalysts. The electocatalytic activity of the material is correlated to its structure and synthesis conditions by a thorough physicochemical analysis including rotating disk electrode (RDE) measurements, porosity analysis with N2 physisorption, scanning and transition electron microscopy imaging (SEM, TEM) and X-ray analysis of the materials' crystal structure and elemental composition. The material shows promising activity and paves way for a dual approach on reducing the CO2 footprint of the energy economy. © 2021 American Chemical Society.",Carbon capture; CO2reduction; Hydrogen evolution; Molten salt; Nonprecious metal catalysts; Oxygen reduction,Carbon footprint; Crystal structure; Doping (additives); Electrocatalysts; Electrolytic reduction; Energy dispersive X ray analysis; Hydrogen production; Nitrogen; Oxygen; Proton exchange membrane fuel cells (PEMFC); Rotating disks; Scanning electron microscopy; X ray diffraction analysis; Bi-functional; CO 2 reduction; Hydrogen evolution reactions; Hydrogen-evolution; Molten salt; Non-precious metal catalysts; Nonprecious-metal catalysts; Oxygen Reduction; Oxygen reduction reaction; ]+ catalyst; Carbon dioxide,Carbon capture;CO2reduction;Hydrogen evolution;Molten salt;Nonprecious metal catalysts;Oxygen reduction;Carbon footprint;Crystal structure;Doping (additives);Electrocatalysts;Electrolytic reduction;Energy dispersive X ray analysis;Hydrogen production;Nitrogen;Oxygen;Proton exchange membrane fuel cells (PEMFC);Rotating disks;Scanning electron microscopy;X ray diffraction analysis;Bi-functional;CO 2 reduction;Hydrogen evolution reactions;Hydrogen-evolution;Non-precious metal catalysts;Nonprecious-metal catalysts;Oxygen reduction reaction;]+ catalyst;Carbon dioxide,"I. Kruusenberg; National Institute of Chemical Physics and Biophysics, Tallinn, Akadeemia Tee 23, 12618, Estonia; email: ivar.kruusenberg@kbfi.ee",,,,,,American Chemical Society,,,,,English,ACS Sustainable Chem. Eng.,Article,Scopus,,2-s2.0-85121928579,,Estonia;United Kingdom,kbfi.ee,,,"Remmel, A.-L.; Ratso, S.; Divitini, G.; Danilson, M.; Mikli, V.; Uibu, M.; Aruvali, J.; Kruusenberg, I."
"Bai, Y.F., Yang, D.G., Yang, M., Chen, H.B., Liu, Y.J., Li, H.M.",Nitrogen/Cobalt Co-doped Mesoporous Carbon Microspheres Derived from Amorphous Metal-Organic Frameworks as a Catalyst for the Oxygen Reduction Reaction in Both Alkaline and Acidic Electrolytes,2019,CHEMELECTROCHEM,6,9,,2546,2552,7,21,10.1002/celc.201900343,,"[Bai, Yafeng; Yang, Duanguang; Yang, Mei; Chen, Hongbiao; Liu, Yijiang; Li, Huaming] Xiangtan Univ, Coll Chem, Xiangtan 411105, Hunan, Peoples R China; [Li, Huaming] Xiangtan Univ, Key Lab Polymer Mat & Applicat Technol Hunan Prov, Coll Hunan Prov, Xiangtan 411105, Hunan, Peoples R China; [Li, Huaming] Xiangtan Univ, Key Lab Adv Funct Polymer Mat, Coll Hunan Prov, Xiangtan 411105, Hunan, Peoples R China",,"Nitrogen/cobalt co-doped carbon (Co/N-C) catalysts are the best candidates to replace their Fe-based analogues for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs), owing to the absence of radical-induced PEMFC membrane/ionomer degradations that are commonly encountered in the Fe/N-C system. Herein, we present an amorphous Co-metal organic framework (MOF) route for the fabrication of N/Co co-doped mesoporous carbon spheres by directly pyrolyzing amorphous Co-MOF microspheres. The as-synthesized Co/N-C-800 catalyst (heat-treated at 800 degrees C) has a unique spherical architecture with short nanotubes on its surface and simultaneously possesses a relatively large Brunauer-Emmett-Teller surface area (381m(2)g(-1)) and a high N content (4.95at%). Owing to these benefits, the Co/N-C-800 catalyst displays good ORR performance in both alkaline and acidic electrolytes, that is, the ORR onset potential (E-o), half-wave potential (E-1/2), and current density at 0.4V (vs. RHE, J(@0.4)) are 0.981V (vs. RHE), 0.872V (vs. RHE), and 5.47mAcm(-2), respectively, in alkaline media, and 0.863V (vs. RHE), 0.707V (vs. RHE), and 5.29mAcm(-2), respectively, in acidic electrolyte. More importantly, the Co/N-C-800 catalyst also exhibits excellent poison tolerance in acidic electrolytes.",oxygen reduction reaction; amorphous metal-organic frameworks; N; Co co-doping; carbon spheres; catalysts,HIGH-PERFORMANCE ELECTROCATALYSTS; PEM FUEL-CELL; CODOPED CARBON; EFFICIENT; FE; GRAPHENE; STABILITY; MEMBRANE; COBALT; IRON,oxygen reduction reaction;amorphous metal-organic frameworks;N;Co co-doping;carbon spheres;catalysts;HIGH-PERFORMANCE ELECTROCATALYSTS;PEM FUEL-CELL;CODOPED CARBON;EFFICIENT;FE;GRAPHENE;STABILITY;MEMBRANE;COBALT;IRON,ydg@xtu.edu.cn; chhb606@163.com; lihuaming@xtu.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,2196-0216,,,,English,CHEMELECTROCHEM,Article,WoS,Electrochemistry,WOS:000471342200024,,China,xtu.edu.cn,Xiangtan Univ,"Xiangtan Univ, China","Bai, Yafeng; Yang, Duanguang; Yang, Mei; Chen, Hongbiao; Liu, Yijiang; Li, Huaming"
"Chao, G., Zhang, Y., Zhang, L., Zong, W., Zhang, N., Xue, T., Fan, W., Liu, T., Xie, Y.",Nitrogen-coordinated single-atom catalysts with manganese and cobalt sites for acidic oxygen reduction†,2021,Journal of Materials Chemistry A,10,11,,5930,5936,,56,10.1039/d1ta08029f,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85127367332&doi=10.1039%2Fd1ta08029f&partnerID=40&md5=333a4091d5b3d1d317e020507fb2a692,"Key Laboratory of Synthetic and Biological Colloids, Jiangnan University, Wuxi, Jiangsu, China; State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai, Shanghai, China; Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China","Chao, Guojie, Key Laboratory of Synthetic and Biological Colloids, Jiangnan University, Wuxi, Jiangsu, China; Zhang, Yizhe, Key Laboratory of Synthetic and Biological Colloids, Jiangnan University, Wuxi, Jiangsu, China; Zhang, Longsheng, Key Laboratory of Synthetic and Biological Colloids, Jiangnan University, Wuxi, Jiangsu, China; Zong, Wei, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai, Shanghai, China; Zhang, Nan, Key Laboratory of Synthetic and Biological Colloids, Jiangnan University, Wuxi, Jiangsu, China; Xue, Tiantian, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai, Shanghai, China; Fan, Wei, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai, Shanghai, China; Liu, Tianxi, Key Laboratory of Synthetic and Biological Colloids, Jiangnan University, Wuxi, Jiangsu, China; Xie, Yi, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China","Developing a low-cost, highly active and durable catalyst for acidic oxygen reduction reaction (ORR) is of significant importance for proton-exchange electrolyte membrane fuel cell. In this work, we report an efficient catalyst based on Mn, Co and N co-doped carbon (MnCo-N-C) for acidic ORR. Electron microscopy and X-ray absorption spectroscopy indicate that atomic CoN<inf>x</inf> and MnN<inf>x</inf> sites are dispersed in the carbon matrices of MnCo-N-C. Raman spectroscopy verifies that the doping of Mn into carbon matrices can enable a higher graphitization degree, which can improve the corrosion resistance and catalytic durability of the MnCo-N-C catalyst towards ORR in challenging acidic media. As a result, the MnCo-N-C catalyst exhibits significantly improved ORR durability with a higher current retention of 81% after 50 h of test compared with that (52%) of the Co-N-C catalyst. Moreover, the half-wave potential of the MnCo-N-C catalyst increases by 100 mV compared with that of the Co-N-C catalyst. This journal is © The Royal Society of Chemistry",,Binary alloys; Carbon; Cobalt; Corrosion resistance; Durability; Electrolytes; Electrolytic reduction; Manganese; Nitrogen; Oxygen; Proton exchange membrane fuel cells (PEMFC); X ray absorption spectroscopy; Carbon catalysts; Carbon matrix; Co-doped; Cobalt sites; Doped carbons; Low-costs; Oxygen Reduction; Oxygen reduction reaction; Single-atoms; ]+ catalyst; Catalysts,Binary alloys;Carbon;Cobalt;Corrosion resistance;Durability;Electrolytes;Electrolytic reduction;Manganese;Nitrogen;Oxygen;Proton exchange membrane fuel cells (PEMFC);X ray absorption spectroscopy;Carbon catalysts;Carbon matrix;Co-doped;Cobalt sites;Doped carbons;Low-costs;Oxygen Reduction;Oxygen reduction reaction;Single-atoms;]+ catalyst;Catalysts,"L. Zhang; Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, International Joint Research Laboratory for Nano Energy Composites, Jiangnan University, Wuxi, China; email: zhangls@jiangnan.edu.cn; Y. Xie; Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, China; email: yxie@ustc.edu.cn",,,,,,Royal Society of Chemistry,20507488,,JMCAE,,English,J. Mater. Chem. A,Article,Scopus,,2-s2.0-85127367332,,China,jiangnan.edu.cn,,,"Chao, G.; Zhang, Y.; Zhang, L.; Zong, W.; Zhang, N.; Xue, T.; Fan, W.; Liu, T.; Xie, Y."
"Bokach, D., ten Hoopen, S., Muthuswamy, N., Buan, M.E.M., Ronning, M.","Nitrogen-doped carbon nanofiber catalyst for ORR in PEM fuel cell stack: Performance, durability and market application aspects",2016,INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,41,39,,17616,17630,15,37,10.1016/j.ijhydene.2016.07.137,,"[Bokach, Dmitry; ten Hoopen, Sander] Prototech AS, Fantoftveien 38, N-5072 Bergen, Norway; [Muthuswamy, Navaneethan; Buan, Marthe E. M.; Ronning, Magnus] Norwegian Univ Sci & Technol, Dept Chem Engn, N-7491 Trondheim, Norway",,"A noble metal-free catalyst based on N-doped carbon nanofibers supported on graphite (N-CNF/Fe) was employed for the oxygen reduction at the cathode of a Nafion PEMFC with a commercial Pt/C anode. Obtained performance in pure H-2 and O-2 indicated the presence of significant mass-transport limitations when utilizing catalyst loading between 1 and 10 mg cm(-2). Strategies to reduce the limitations were explored by optimization of the cathode ionomer content, catalyst loading and application technique. Pore-formers (Li2CO3, (NH4)(2)CO3 and polystyrene microspheres) were utilized to improve the mass-transport within the layer. A maximum of 72 mW cm(-2) and 1400 A g(-1) or 300 W g(-1) at peak power was demonstrated. The catalyst was then applied to the cathode of a 10-cell fuel cell stack, and a 400-h durability test was conducted. The average cell voltage decay amounted to 162 mu V h(-1). Finally, a market application analysis was conducted to illustrate the potential and challenges of replacing platinum as cathode catalyst. It was shown that even a near-complete elimination of the cathode catalyst cost by substitution of platinum with a carbon-based catalyst cannot produce a cost competitive product unless both the performance and the durability of the fuel cell with the new catalyst are very close to that of the state-of the art Pt-based system. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.",Noble metal-free catalysts; Nitrogen-doped carbon; Oxygen reduction reaction; PEM fuel cell; Cathode; Market application analysis,OXYGEN REDUCTION REACTION; METHANOL-TOLERANT ELECTROCATALYST; NONPRECIOUS METAL CATALYST; CATHODE CATALYST; FE/N/C-CATALYSTS; MESOPOROUS CARBON; ORGANIC-FRAMEWORK; HOLLOW SPHERES; GRAPHENE OXIDE; NAFION IONOMER,Noble metal-free catalysts;Nitrogen-doped carbon;Oxygen reduction reaction;PEM fuel cell;Cathode;Market application analysis;METHANOL-TOLERANT ELECTROCATALYST;NONPRECIOUS METAL CATALYST;CATHODE CATALYST;FE/N/C-CATALYSTS;MESOPOROUS CARBON;ORGANIC-FRAMEWORK;HOLLOW SPHERES;GRAPHENE OXIDE;NAFION IONOMER,dmitry.bokach@prototech.no,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0360-3199,,,,English,INT J HYDROGEN ENERG,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels,WOS:000384389300043,,Norway,prototech.no,Prototech AS;Norwegian Univ Sci & Technol,"Prototech AS, Norway;Norwegian Univ Sci & Technol, Norway","Bokach, Dmitry; ten Hoopen, Sander; Muthuswamy, Navaneethan; Buan, Marthe E. M.; Ronning, Magnus"
"Kazeminasab, B., Rowshanzamir, S., Ghadamian, H.",Nitrogen doped graphene/cobalt-based catalyst layers of a PEM fuel cell: Performance evaluation and multi-objective optimization,2017,KOREAN JOURNAL OF CHEMICAL ENGINEERING,34,11,,2978,2983,6,10,10.1007/s11814-017-0202-2,,"[Kazeminasab, Bagher] Islamic Azad Univ, Sci & Res Branch, Dept Energy Engn, Grad Coll Environm & Energy, Tehran, Iran; [Rowshanzamir, Soosan] Iran Univ Sci & Technol, Sch Chem Engn, Tehran, Iran; [Rowshanzamir, Soosan] Iran Univ Sci & Technol, Green Res Ctr, Fuel Cell Lab, Tehran, Iran; [Ghadamian, Hossein] MERC, Dept Energy, Tehran, Iran",,"The proton exchange membrane fuel cell could be made more commercially viable by substituting the expensive platinic catalyst without loss of performance. This should be done simultaneously through optimization and use of a non-precious metal catalyst. In this study, multi-objective optimization of the catalyst layer was done on nonprecious metal catalysts. Nitrogen-doped graphene (NG)-based cobalt was synthesized as a non-precious metal catalyst. Differential equations were solved at the modeling stage by the shooting method, and objective functions were solved at the optimization stage using sequential quadratic programming. NG-based cobalt was evaluated in a cell and then compared with the platinum catalyst. Results present the synthesized non-precious catalyst as an appropriate replacement for existing precious metal catalyst. Also, the polarization curve demonstrates that the current modeling is in good agreement with NG-based cobalt catalyst. Finally, the Pareto curve at the voltage of 0.6 V (and 300 A/m(2) current density in the base case) indicated that the best tradeoff between cost and performance of the catalyst layer was achieved when the current density was increased in the range of 5% to 15%.",PEM Fuel Cell; Multi-objective Optimization; Non-precious Catalyst; Nitrogen Doped Grapheme-based Cobalt; Pareto Curve,MULTIVARIABLE OPTIMIZATION; MODEL,PEM Fuel Cell;Multi-objective Optimization;Non-precious Catalyst;Nitrogen Doped Grapheme-based Cobalt;Pareto Curve;MULTIVARIABLE OPTIMIZATION;MODEL,rowshanzamir@iust.ac.ir,,"F.5, 119, ANAM-RO, SEONGBUK-GU, SEOUL 136-075, SOUTH KOREA",,,,KOREAN INSTITUTE CHEMICAL  ENGINEERS,0256-1115,,,,English,KOREAN J CHEM ENG,Article,WoS,Chemistry; Engineering,WOS:000415006800019,2-s2.0-85028988034,Iran,iust.ac.ir,Islamic Azad Univ;Iran Univ Sci & Technol;MERC,"Islamic Azad Univ, Iran;Iran Univ Sci & Technol, Iran;MERC, Iran","Kazeminasab, Bagher; Rowshanzamir, Soosan; Ghadamian, Hossein"
"Nallathambi, V., Leonard, N., Kothandaraman, R., Barton, S.C.",Nitrogen Precursor Effects in Iron-Nitrogen-Carbon Oxygen Reduction Catalysts,2011,ELECTROCHEMICAL AND SOLID STATE LETTERS,14,6,,B55,B58,4,64,10.1149/1.3566065,,"[Nallathambi, Vijayadurga; Leonard, Nathaniel; Kothandaraman, Ramanujam; Barton, Scott Calabrese] Michigan State Univ, Dept Chem Engn & Mat Sci, E Lansing, MI 48824 USA",,"Metal-nitrogen-carbon (MNC) cathode catalysts were synthesized using nitrogen precursors of varying Nitrogen/Carbon (N/C) ratio by pyrolysis in a constant volume reaction vessel. Here, we demonstrate that increasing a key property, the N/C ratio of the nitrogen precursor increased the accessible active site density by reducing carbon deposition in the pores of the carbon support during pyrolysis. The most active catalysts were obtained in this work using melamine, having a N/C ratio of 2. Kinetic current density as high as 13 A cm(-3) at 0.8 V(iR-free) and over 100 h of stable current at 0.5 V were observed with melamine based MNC catalysts. (C) 2011 The Electrochemical Society. [DOI: 10.1149/1.3566065] All rights reserved.",,PEM FUEL-CELLS; FE-BASED CATALYSTS; ELECTROLYTE; ELECTROCATALYSTS; PERFORMANCE; PYROLYSIS; CATHODES; SUPPORTS; BLACKS,PEM FUEL-CELLS;FE-BASED CATALYSTS;ELECTROLYTE;ELECTROCATALYSTS;PERFORMANCE;PYROLYSIS;CATHODES;SUPPORTS;BLACKS,scb@msu.edu,,"65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA",,,,ELECTROCHEMICAL SOC INC,1099-0062,,,,English,ELECTROCHEM SOLID ST,Article,WoS,Electrochemistry; Materials Science,WOS:000289165400008,,United States,msu.edu,Michigan State Univ,"Michigan State Univ, United States","Nallathambi, Vijayadurga; Leonard, Nathaniel; Kothandaraman, Ramanujam; Barton, Scott Calabrese"
"He, C.Y., Zhang, J.J., Shen, P.K.",Nitrogen-self-doped graphene-based non-precious metal catalyst with superior performance to Pt/C catalyst toward oxygen reduction reaction,2014,JOURNAL OF MATERIALS CHEMISTRY A,2,9,,3231,3236,6,73,10.1039/c3ta14070a,,"[He, Chunyong; Shen, Pei Kang] Sun Yat Sen Univ, Sch Phys & Engn, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China; [He, Chunyong; Shen, Pei Kang] Sun Yat Sen Univ, Sch Phys & Engn, Guangdong Prov Key Lab Low Carbon Chem & Energy C, Guangzhou 510275, Guangdong, Peoples R China; [Zhang, Jiu Jun] Natl Res Council Canada, Vancouver, BC V6T 1W5, Canada",,"A new, simple and scalable synthesis methodology is invented for an N-self-doped graphene-based non-precious Fe catalyst (Fe-N-graphene) for the oxygen reduction reaction (ORR) both in acidic and alkaline media. The electrochemical characterization shows that this Fe-N-graphene catalyst possesses outstanding electrocatalytic ORR activity (similar to Pt/C catalyst in alkaline media and slightly lower in acidic media), and both superior stability and fuel (methanol and CO) tolerance to Pt/C catalysts. We believe that this is the first time for a non-precious metal catalyst to have superior ORR performance to Pt/C catalyst. In addition, our synthesis methodology can be scaled up for the mass production of N-self-doped graphene-based fuel cell non-noble metal catalysts and other nanomaterials.",,PEM FUEL-CELLS; CARBON; SUPPORT; ELECTROCATALYSTS; SITES; IRON,PEM FUEL-CELLS;CARBON;SUPPORT;ELECTROCATALYSTS;SITES;IRON,jiujun.zhang@nrc.gc.ca; stsspk@mail.sysu.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000331248600048,,China;Canada,nrc.gc.ca,Sun Yat Sen Univ;Natl Res Council Canada,"Sun Yat Sen Univ, China;Natl Res Council Canada, Canada","He, Chunyong; Zhang, Jiu Jun; Shen, Pei Kang"
"Zhou, X.J., Xu, P., Xu, L., Bai, Z.Y., Chen, Z.W., Qiao, J.L., Zhang, J.J.","N,N'-Bis(salicylidene)ethylenediamine as a nitrogen-rich precursor to synthesize electrocatalysts with high methanol-tolerance for polymer electrolyte membrane fuel cell oxygen reduction reaction",2014,JOURNAL OF POWER SOURCES,260,,,349,356,8,7,10.1016/j.jpowsour.2014.03.017,,"[Zhou, Xuejun; Xu, Pan; Xu, Li; Qiao, Jinli] Donghua Univ, Coll Environm Sci & Engn, Shanghai 201620, Peoples R China; [Bai, Zhengyu; Qiao, Jinli; Zhang, Jiujun] Henan Normal Univ, Sch Chem & Chem Engn, Key Lab Green Chem Media & React, Minist Educ, Xinxiang 453007, Peoples R China; [Chen, Zhongwei] Univ Waterloo, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada; [Zhang, Jiujun] Natl Res Council Canada, NRC Energy Min & Environm, Vancouver, BC V6T 1W5, Canada",,"A cost-effective chemical, N,N'-bis(salicylidene)ethylenediamine (salen), is used as a ligand to form a carbon-supported Co-salen complex (Co-salen/C) by a simple solid-sate reaction. The Co-salen/C is then pyrolyzed at 600, 700, 800, 900, and 1000 degrees C to form carbon-supported Co-N-S/C catalysts for the oxygen reduction reaction (ORR). XRD, EDX, TEM, and XPS are used to characterize the catalysts' composition, crystalline nature, morphology, and possible surface groups induced by heat-treatment. Investigation of the catalytic activity and the ORR mechanisms using rotating disk electrode and rotating ring-disk electrode techniques demonstrates that all of these Co-N-S/C catalysts are highly active for the ORR in an O-2-saturated 0.1 M KOH solution, but the catalyst heat treated at 700 degrees C gives the best ORR activity. The overall electron transfer number for the catalyzed ORR was determined to be 3.6-3.9, with 3.7-19.9% H2O2 production over the potential range of -0.05 to -0.60 V, suggesting that the ORR catalyzed by Co-N-S/C catalysts is dominated by a 4-electron transfer pathway from O-2 to H2O. In addition, these catalysts exhibit superior methanol tolerance to commercial 40% Pt/C catalyst, thus the Co-N-S/C catalysts are promising for use as electrocatalysts in alkaline polymer electrolyte membrane fuel cells. (C) 2014 Elsevier B.V. All rights reserved.",Oxygen reduction reaction; Non-precious metal catalyst; Active sites; Methanol tolerance; Alkaline fuel cell,NONPRECIOUS METAL ELECTROCATALYSTS; HIGH-PERFORMANCE; THIN-FILM; CATALYSTS; CARBON; COBALT; CO; IRON; ELECTROREDUCTION; POLYPYRROLE,Oxygen reduction reaction;Non-precious metal catalyst;Active sites;Methanol tolerance;Alkaline fuel cell;NONPRECIOUS METAL ELECTROCATALYSTS;HIGH-PERFORMANCE;THIN-FILM;CATALYSTS;CARBON;COBALT;CO;IRON;ELECTROREDUCTION;POLYPYRROLE,baizhengyu2000@163.com; zhwchen@uwaterloo.ca; qiaojl@dhu.edu.cn; jiujun.zhang@nrc.gc.ca,,"PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS",,,,ELSEVIER SCIENCE BV,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:000335626300045,2-s2.0-84898066555,China;Canada,163.com,Donghua Univ;Henan Normal Univ;Univ Waterloo;Natl Res Council Canada,"Donghua Univ, China;Henan Normal Univ, China;Univ Waterloo, Canada;Natl Res Council Canada, Canada","Zhou, Xuejun; Xu, Pan; Xu, Li; Bai, Zhengyu; Chen, Zhongwei; Qiao, Jinli; Zhang, Jiujun"
"Zhao, S.L., Ma, Z.Z., Wan, Z.H., Li, J.P., Wang, X.G.",Noble-Metal-Free FeMn-N-C catalyst for efficient oxygen reduction reaction in both alkaline and acidic media,2023,JOURNAL OF COLLOID AND INTERFACE SCIENCE,642,,,800,809,10,48,10.1016/j.jcis.2023.03.206,,"[Zhao, Shuaili; Wan, Zihao; Wang, Xiaoguang] Taiyuan Univ Technol, Coll Mat Sci & Engn, Inst New Carbon Mat, Lab Adv Mat & Energy Electrochem, Taiyuan 030024, Peoples R China; [Ma, Zizai] Taiyuan Univ Technol, Coll Chem, Taiyuan 030024, Peoples R China; [Ma, Zizai; Li, Jinping; Wang, Xiaoguang] Taiyuan Univ Technol, Shanxi Key Lab Gas Energy Efficient & Clean Utiliz, Taiyuan 030024, Peoples R China",,"The oxygen reduction reaction (ORR) is important cathodic reaction running in several electrochemical energy conversion devices. It is still difficult to develop non-precious nanocatalysts for ORR that have high activity and increased durability for practical application. Herein, bimetallic FeMn(mIm)-N-C composite incorporated with Fe and Mn via an encapsulation-ligand exchange technique is prepared and established as an efficient ORR catalyst. The results reveal that FeMn(mIm)-N-C shows outstanding ORR performance with E1/2 of 0.861 V and 0.778 V in alkaline and acid solutions, along with robust durability. Additionally, the assembled Zn-Air batteries (ZAB) and proton exchange membrane fuel cells (PEMFCs) both have exceptional power densities and show promise for long-term stability compared to 20% Pt/C. The present work provides a useful strategy for designing and synthesizing a reliable lowcost and high-efficient electrocatalysts for energy conversion and storage.(c) 2023 Elsevier Inc. All rights reserved.",Oxygen reduction reaction; Synergistic effect; Zn-air battery; PEMFC; M-N-C catalysts,CARBON NANOTUBES; POROUS CARBON; DOPED CARBON; EXCHANGE; SITES; ELECTROCATALYSTS; PERFORMANCE; STRATEGY; NITROGEN,Oxygen reduction reaction;Synergistic effect;Zn-air battery;PEMFC;M-N-C catalysts;CARBON NANOTUBES;POROUS CARBON;DOPED CARBON;EXCHANGE;SITES;ELECTROCATALYSTS;PERFORMANCE;STRATEGY;NITROGEN,mazizai@tyut.edu.cn; wangxiaog1982@163.com,,"525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA",,,,ACADEMIC PRESS INC ELSEVIER SCIENCE,0021-9797,,,37043938,English,J COLLOID INTERF SCI,Article,WoS,Chemistry,WOS:000979956800001,2-s2.0-85151790256,China,tyut.edu.cn,Taiyuan Univ Technol,"Taiyuan Univ Technol, China","Zhao, Shuaili; Ma, Zizai; Wan, Zihao; Li, Jinping; Wang, Xiaoguang"
"Videla, A.H.A.M., Ban, S., Specchia, S., Zhang, L., Zhang, J.J.",Non-noble Fe-Nx electrocatalysts supported on the reduced graphene oxide for oxygen reduction reaction,2014,CARBON,76,,,386,400,15,78,10.1016/j.carbon.2014.04.092,,"[Videla, Alessandro H. A. Monteverde; Specchia, Stefania] Politecn Torino, Dept Appl Sci & Technol, I-10129 Turin, Italy; [Ban, Shuai; Zhang, Lei; Zhang, Jiujun] Natl Res Council Canada, Vancouver, BC V6T 1W5, Canada",,"In this paper, the reduced gaphene oxide (rGO) is synthesized from graphite oxide (GO) via microwave exfoliation method, and used to support non-noble metal Fe-N-x based electrocatalysts (Fe-N-x/rGO) for the oxygen reduction reaction (ORR). Tripyridyl triazine (TPTZ) is used as a ligand for Fe-N-x catalyst preparation. The obtained catalyst presents a high content of pyridinic (N1) and pyrrolic (N2) nitrogen types on the catalyst surface (40.0% and 52.3% atomic concentrations, respectively) with Fe atomic content of 0.7%. A catalyst loading of 0.5 mg cm(-2) with a ionomer-to-carbon (ITC) mass ratio of 0.2 deposited on the glassy carbon electrode allows the highest ORR activity with the specific current of --0.35 mA mg(-1) at a cell voltage of 0.8 V (vs. RHE). The overall electron transfer number obtained is of 3.98. Stability tests in acidic solution for this catalyst are also performed. (C) 2014 Elsevier Ltd. All rights reserved.",,NITROGEN-DOPED GRAPHENE; PEM FUEL-CELLS; METAL-FREE ELECTROCATALYSTS; MESOPOROUS CARBON SPHERES; FUNCTIONALIZED GRAPHENE; FE/N/C CATALYSTS; O-2 REDUCTION; ACTIVE-SITES; IRON; COMPOSITES,NITROGEN-DOPED GRAPHENE;PEM FUEL-CELLS;METAL-FREE ELECTROCATALYSTS;MESOPOROUS CARBON SPHERES;FUNCTIONALIZED GRAPHENE;FE/N/C CATALYSTS;O-2 REDUCTION;ACTIVE-SITES;IRON;COMPOSITES,stefania.specchia@polito.it; lei.zhang@nrc.gc.ca,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0008-6223,,,,English,CARBON,Article,WoS,Chemistry; Materials Science,WOS:000337985300044,,Italy;Canada,polito.it,Politecn Torino;Natl Res Council Canada,"Politecn Torino, Italy;Natl Res Council Canada, Canada","Videla, Alessandro H. A. Monteverde; Ban, Shuai; Specchia, Stefania; Zhang, Lei; Zhang, Jiujun"
"Hao, Z., Ma, Y.Y., Chen, Y.S., Fu, P., Wang, P.Y.",Non-Noble Metal Catalysts in Cathodic Oxygen Reduction Reaction of Proton Exchange Membrane Fuel Cells: Recent Advances,2022,NANOMATERIALS,12,19,3331,,,23,26,10.3390/nano12193331,,"[Hao, Zhuo; Chen, Yisong; Fu, Pei] Changan Univ, Sch Automobile, Xian 710064, Peoples R China; [Ma, Yangyang; Wang, Pengyu] Jilin Univ, Coll Automot Engn, Changchun 130012, Peoples R China",,"The oxygen reduction reaction (ORR) is one of the crucial energy conversion reactions in proton exchange membrane fuel cells (PEMFCs). Low price and remarkable catalyst performance are very important for the cathode ORR of PEMFCs. Among the various explored ORR catalysts, non-noble metals (transition metal: Fe, Co, Mn, etc.) and N co-doped C (M-N-C) ORR catalysts have drawn increasing attention due to the abundance of these resources and their low price. In this paper, the recent advances of single-atom catalysts (SACs) and double-atom catalysts (DACs) in the cathode ORR of PEMFCs is reviewed systematically, with emphasis on the synthesis methods and ORR performance of the catalysts. Finally, challenges and prospects are provided for further advancing non-noble metal catalysts in PEMFCs.",transition metal; oxygen reduction reaction; proton exchange membrane fuel cells; synthesis methods; performance,N-DOPED CARBON; SINGLE-ATOM CATALYSTS; HIGH-PERFORMANCE; ACTIVE-SITES; SYNTHETIC STRATEGIES; ALLOY NANOPARTICLES; C ELECTROCATALYST; ORGANIC FRAMEWORK; NITROGEN; FE,transition metal;oxygen reduction reaction;proton exchange membrane fuel cells;synthesis methods;performance;N-DOPED CARBON;SINGLE-ATOM CATALYSTS;HIGH-PERFORMANCE;ACTIVE-SITES;SYNTHETIC STRATEGIES;ALLOY NANOPARTICLES;C ELECTROCATALYST;ORGANIC FRAMEWORK;NITROGEN;FE,chenyisong_1988@163.com; peifu@chd.edu.cn,,"ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND",,,,MDPI,,,,36234459,English,NANOMATERIALS-BASEL,Review,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000867100400001,2-s2.0-85139858454,China,163.com,Changan Univ;Jilin Univ,"Changan Univ, China;Jilin Univ, China","Hao, Zhuo; Ma, Yangyang; Chen, Yisong; Fu, Pei; Wang, Pengyu"
"Tao, J.J., Wang, X., Xu, M.J., Liu, C.P., Ge, J.J., Xing, W.",Non-noble metals as activity sites for ORR catalysts in proton exchange membrane fuel cells (PEMFCs),2023,INDUSTRIAL CHEMISTRY & MATERIALS,1,3,,,,23,46,10.1039/d3im00002h,,"[Tao, Jinjing; Wang, Xian; Xu, Mingjun; Liu, Changpeng; Ge, Junjie; Xing, Wei] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Jilin Prov Key Lab Low Carbon Chem Power, Changchun 130022, Peoples R China; [Tao, Jinjing; Wang, Xian; Xu, Mingjun; Liu, Changpeng; Ge, Junjie; Xing, Wei] Univ Sci & Technol China, Sch Appl Chem & Engn, Hefei 230026, Peoples R China",,"Proton exchange membrane fuel cells (PEMFCs) have great potential to become the next generation green energy technique, but their application is limited by the slow kinetics of the cathode oxygen reduction reaction (ORR) in acidic medium. Meanwhile, the high price of Pt-based catalysts, which are now widely used commercially, has raised the cost of PEMFCs. Therefore, non-noble metal ORR catalysts as alternatives to Pt-based group metals (PGM) have attracted much attention. However, there is still a big gap between the performance of non-noble metal catalysts and commercial Pt/C catalysts in acidic environment. Recently, it has been realized that the performance of catalysts is closely related to the structure of catalytically active sites. Inspired by this, in this review, we firstly introduced the development and breakthrough of non-noble metals as activity sites. We then briefly summarized their catalytic mechanisms, and put forward some suggestions on how to improve the activity and stability of non-noble metal ORR catalysts.Keywords: ORR; Non-noble metal single atom catalysts; Active site; Fuel cell.",,OXYGEN REDUCTION REACTION; N-C CATALYSTS; DOPED CARBON; POROUS CARBON; EVOLUTION REACTIONS; ORGANIC FRAMEWORKS; EFFICIENT; NITROGEN; IRON; ELECTROCATALYSTS,OXYGEN REDUCTION REACTION;N-C CATALYSTS;DOPED CARBON;POROUS CARBON;EVOLUTION REACTIONS;ORGANIC FRAMEWORKS;EFFICIENT;NITROGEN;IRON;ELECTROCATALYSTS,xwang@ciac.ac.cn; gejunjie@ustc.edu.cn; xingwei@ciac.ac.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2755-2608,,,,English,IND CHEM MATER,Review,WoS,Engineering; Materials Science,WOS:001362700200001,,China,ciac.ac.cn,Chinese Acad Sci;Univ Sci & Technol China,"Chinese Acad Sci, China;Univ Sci & Technol China, China","Tao, Jinjing; Wang, Xian; Xu, Mingjun; Liu, Changpeng; Ge, Junjie; Xing, Wei"
"Cherif, M., Dodelet, J.P., Zhang, G.X., Glibin, V.P., Sun, S.H., Vidal, F.",Non-PGM Electrocatalysts for PEM Fuel Cells: A DFT Study on the Effects of Fluorination of FeNx-Doped and N-Doped Carbon Catalysts,2021,MOLECULES,26,23,7370,,,14,8,10.3390/molecules26237370,,"[Cherif, Mohamed; Dodelet, Jean-Pol; Zhang, Gaixia; Glibin, Vassili P.; Sun, Shuhui; Vidal, Francois] Inst Natl Rech Sci, Ctr Energie, Mat, Telecommun, 1650 Bd Lionel Boulet, Varennes, PQ J3X 1S2, Canada",,"Fluorination is considered as a means of reducing the degradation of Fe/N/C, a highly active FeNx-doped disorganized carbon catalyst for the oxygen reduction reaction (ORR) in PEM fuel cells. Our recent experiments have, however, revealed that fluorination poisons the FeNx moiety of the Fe/N/C catalytic site, considerably reducing the activity of the resulting catalyst to that of carbon only doped with nitrogen. Using the density functional theory (DFT), we clarify in this work the mechanisms by which fluorine interacts with the catalyst. We studied 10 possible FeNx site configurations as well as 2 metal-free sites in the absence or presence of fluorine molecules and atoms. When the FeNx moiety is located on a single graphene layer accessible on both sides, we found that fluorine binds strongly to Fe but that two F atoms, one on each side of the FeNx plane, are necessary to completely inhibit the catalytic activity of the FeNx sites. When considering the more realistic model of a stack of graphene layers, only one F atom is needed to poison the FeNx moiety on the top layer since ORR hardly takes place between carbon layers. We also found that metal-free catalytic N-sites are immune to poisoning by fluorination, in accordance with our experiments. Finally, we explain how most of the catalytic activity can be recovered by heating to 900 degrees C after fluorination. This research helps to clarify the role of metallic sites compared to non-metallic ones upon the fluorination of FeNx-doped disorganized carbon catalysts.",oxygen reduction reaction; proton exchange membrane fuel cell; fluorination; density functional theory; non-noble metal catalyst; N-doped carbon catalyst,OXYGEN-REDUCTION REACTION; INITIO MOLECULAR-DYNAMICS; DENSITY-FUNCTIONAL THEORY; TOTAL-ENERGY CALCULATIONS; ACIDIC MEDIA; ACTIVE-SITES; STABILITY; GRAPHENE; NANOSTRUCTURES; PREDICTIONS,oxygen reduction reaction;proton exchange membrane fuel cell;fluorination;density functional theory;non-noble metal catalyst;N-doped carbon catalyst;OXYGEN-REDUCTION REACTION;INITIO MOLECULAR-DYNAMICS;DENSITY-FUNCTIONAL THEORY;TOTAL-ENERGY CALCULATIONS;ACIDIC MEDIA;ACTIVE-SITES;STABILITY;GRAPHENE;NANOSTRUCTURES;PREDICTIONS,mohamed.cherif@inrs.ca; jean-pol.dodelet@inrs.ca; gaixia.zhang@inrs.ca; vassili.glibin@gmail.com; shuhui.sun@inrs.ca; francois.vidal@inrs.ca,,"MDPI AG, Grosspeteranlage 5, CH-4052 BASEL, SWITZERLAND",,,,MDPI,,,,34885951,English,MOLECULES,Article,WoS,Biochemistry & Molecular Biology; Chemistry,WOS:000741982800001,2-s2.0-85121108938,Canada,inrs.ca,Inst Natl Rech Sci,"Inst Natl Rech Sci, Canada","Cherif, Mohamed; Dodelet, Jean-Pol; Zhang, Gaixia; Glibin, Vassili P.; Sun, Shuhui; Vidal, Francois"
"Zhang, G.X., Yang, X.H., Dubois, M., Herraiz, M., Chenitz, R., Lefevre, M., Cherif, M., Vidal, F., Glibin, V.P., Sun, S.H., Dodelet, J.P.",Non-PGM electrocatalysts for PEM fuel cells: effect of fluorination on the activity and stability of a highly active NC_Ar+NH3 catalyst,2019,ENERGY & ENVIRONMENTAL SCIENCE,12,10,,3015,3037,23,79,10.1039/c9ee00867e,,"[Zhang, Gaixia; Yang, Xiaohua; Chenitz, Regis; Lefevre, Michel; Cherif, Mohamed; Vidal, Francois; Sun, Shuhui; Dodelet, Jean-Pol] INRS Energie Mat & Telecommun, 1650 Blvd Lionel Boulet, Varennes, PQ J3X 1S2, Canada; [Dubois, Marc; Herraiz, Michael] Univ Clermont Auvergne, CNRS, SIGMA Clermont, Inst Chim Clermont Ferrand, F-6300 Clermont Ferrand, France; [Glibin, Vassili P.] Univ Western Ontario, Dept Chem & Biochem Engn, London, ON N6A 5B9, Canada",,"In this work, we explore the behavior of our highly active cathode catalyst NC_Ar + NH3 (labeled NC here) before and after fluorination by F2 at room temperature, in order to deepen our understanding of the activity and stability of this highly active catalyst for oxygen electroreduction in H2/air and H2/O2 PEM fuel cells. We discovered that all Fe-based catalytic sites were poisoned by the reaction with F2, even after 2 min of fluorination, and the H2/O2 fuel cell polarization curves of F2-poisoned NC were the same as the polarization curve of MOF_CNx_Ar + NH3, which is a catalyst devoid of Fe, but having the same CNx active sites as those contributing to the NC activity. The F2-poisoned NC catalysts may be partially (B70%) reactivated by a heattreatment at 900 1C in Ar, a temperature at which all Fe-Fm bonds of the catalytic sites and all the C-Fp bonds of the NC carbon support are broken. Based on the deconvolution of the XPS N1s spectra recorded for the pristine and fluorinated NC catalysts, we estimated an average turn-over-frequency (ToF) for the FeN4 catalytic sites in H2/O2 fuel cells. ToF of NC B 0.177 0.020 electrons site1 s1 at 0.9 V, which is about five times smaller than the ToF for Pt/C at 0.9 V. The stability of pristine and fluorinated NC catalysts has been studied at 0.6 V in H2/air and H2/O2 fuel cells. The instability behavior of fluorinated NC catalysts was found to be similar to that of MOF_CNx_Ar + NH3, but different from that of NC. It is shown that when the catalyst has active FeN4 sites, it is the model proposed by INRS and using the superposition of two exponential decays that better fits the experimental decay, while the Los Alamos autocatalytic model is preferred when there are no Fe-based active sites in the catalyst or if the FeN4 sites are poisoned (e.g., by fluorination as in this work).",,OXYGEN REDUCTION REACTION; METAL-FREE ELECTROCATALYST; REDUCED GRAPHENE OXIDE; IRON-BASED CATALYSTS; DOPED CARBON; TURNOVER FREQUENCY; FE/N/C-CATALYSTS; OXIDATION-STATE; VAPOR-PRESSURE; SITE DENSITY,OXYGEN REDUCTION REACTION;METAL-FREE ELECTROCATALYST;REDUCED GRAPHENE OXIDE;IRON-BASED CATALYSTS;DOPED CARBON;TURNOVER FREQUENCY;FE/N/C-CATALYSTS;OXIDATION-STATE;VAPOR-PRESSURE;SITE DENSITY,marc.dubois@uca.fr; shuhui@emt.inrs.ca; dodelet@emt.inrs.ca,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,1754-5692,,,,English,ENERG ENVIRON SCI,Article,WoS,Chemistry; Energy & Fuels; Engineering; Environmental Sciences & Ecology,WOS:000489897600022,,Canada;France,uca.fr,INRS Energie Mat & Telecommun;Univ Clermont Auvergne;Univ Western Ontario,"INRS Energie Mat & Telecommun, Canada;Univ Clermont Auvergne, France;Univ Western Ontario, Canada","Zhang, Gaixia; Yang, Xiaohua; Dubois, Marc; Herraiz, Michael; Chenitz, Regis; Lefevre, Michel; Cherif, Mohamed; Vidal, Francois; Glibin, Vassili P.; Sun, Shuhui; Dodelet, Jean-Pol"
"Stariha, S., Artyushkova, K., Serov, A., Atanassov, P.",Non-PGM membrane electrode assemblies: Optimization for performance,2015,INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,40,42,,14676,14682,7,38,10.1016/j.ijhydene.2015.05.185,,"[Atanassov, Plamen] Univ New Mexico, Dept Chem & Biol Engn, Albuquerque, NM 87131 USA; Univ New Mexico, Ctr Microengineered Mat, Albuquerque, NM 87131 USA",,"The performance of non-platinum group metals (non-PGM) iron nitrogen carbon (Fe-N-C) based cathode in fuel cell operation conditions was studied. The effect of Nafion to catalyst ratio as well as carbon additives on the activity was studied. It was found that ionomer plays a key role in proton and water transport within the MEA. To compensate intrinsic low electronic conductivity of Fe-N-C materials additional carbons such as Vulcan XC72R, Ketjen Black 600 EC, and carbon nanotubes (CNTs) were added to MEA inks. X-ray Phototelectron Spectroscopy studied the effect of these carbon additives on chemical composition of catalysts. It was determined that inks with 35 wt% of Nafion ionomer resulted in the optimal performance of the Fe-N-C cathode catalyst in the air. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.",Non-platinum electrocatalysts; Membrane electrode assembly; Nafion ionomer content; Polarization curve; Multivariate analysis,PEM FUEL-CELL; ELECTRICAL-CONDUCTIVITY; NONPLATINUM CATHODE; CATALYST LAYERS; IONOMER CONTENT; INK COMPOSITION; CARBON SUPPORT; ELECTROREDUCTION; POWDERS; IRON,Non-platinum electrocatalysts;Membrane electrode assembly;Nafion ionomer content;Polarization curve;Multivariate analysis;PEM FUEL-CELL;ELECTRICAL-CONDUCTIVITY;NONPLATINUM CATHODE;CATALYST LAYERS;IONOMER CONTENT;INK COMPOSITION;CARBON SUPPORT;ELECTROREDUCTION;POWDERS;IRON,starihas@unm.edu; kartyush@unm.edu; serov@unm.edu; plamen@unm.edu,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",2nd Euro-Mediterranean-Hydrogen-Technologies-Conference (EmHyTeC 2014),"Taormina, ITALY","DEC 09-12, 2014",PERGAMON-ELSEVIER SCIENCE LTD,0360-3199,,,,English,INT J HYDROGEN ENERG,Article; Proceedings Paper,WoS,Chemistry; Electrochemistry; Energy & Fuels,WOS:000364256300027,,United States,unm.edu,Univ New Mexico;Ctr Microengineered Mat,"Univ New Mexico, United States;Ctr Microengineered Mat, United States","Stariha, Sarah; Artyushkova, Kateryna; Serov, Alexey; Atanassov, Plamen"
"Helsel, N., Choudhury, P.",Non-Platinum Group Metal Oxygen Reduction Catalysts for a Hydrogen Fuel Cell Cathode: A Mini-Review,2025,CATALYSTS,15,6,588,,,22,2,10.3390/catal15060588,,"[Helsel, Naomi; Choudhury, Pabitra] New Mex Tech, Chem Engn Dept, Socorro, NM 87801 USA",,"Although platinum-based catalysts are highly effective for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs), their high cost and scarcity limit large-scale commercialization. As a result, platinum group metal-free catalysts-particularly Fe-N-C materials-have received increasing attention as promising alternatives. Despite significant progress, no platinum-group metal-free (PGM-free) catalyst has yet matched the performance and durability of commercial Pt/C in acidic media. Recent advances in synthesis strategies, however, have led to notable improvements in the activity, stability, and active site density of Fe-N-C catalysts. This review highlights key synthesis approaches, including pyrolysis, MOF-derived templates, and cascade anchoring, and discusses how these methods contribute to improved nitrogen coordination, electronic structure modulation, and active site engineering. The continued refinement of these strategies, alongside improved catalyst screening techniques, is essential for closing the performance gap and enabling the practical deployment of non-PGM catalysts in PEMFC technologies.",ORR; PGM-Free Catalysis; PEMFC; Fe-N-C,GRAPHENE-BASED MATERIALS; DOPED GRAPHENE; PERFORMANCE; EXCHANGE; ELECTROCATALYSTS; ACHIEVEMENTS; CHALLENGES; SUPPORT; FE-N-4; SITES,ORR;PGM-Free Catalysis;PEMFC;Fe-N-C;GRAPHENE-BASED MATERIALS;DOPED GRAPHENE;PERFORMANCE;EXCHANGE;ELECTROCATALYSTS;ACHIEVEMENTS;CHALLENGES;SUPPORT;FE-N-4;SITES,naomi.helsel@student.nmt.edu; pabitra.choudhury@nmt.edu,,"MDPI AG, Grosspeteranlage 5, CH-4052 BASEL, SWITZERLAND",,,,MDPI,,,,,English,CATALYSTS,Review,WoS,Chemistry,WOS:001514745200001,2-s2.0-105009002626,United States,student.nmt.edu,New Mex Tech,"New Mex Tech, United States","Helsel, Naomi; Choudhury, Pabitra"
"Ren, W.Q., Chang, Z., Zhang, J.W., Wang, L., Xu, C.X.",Nonprecious Co-N-P-C@Mo2TiC2 Catalyst for the High-Performance Oxygen Reduction Reaction in PEMFCs,2022,ACS APPLIED ENERGY MATERIALS,5,12,,15828,15833,6,12,10.1021/acsaem.2c03384,,"[Ren, Wenqing; Chang, Zhou; Zhang, Jiawei; Wang, Ling; Xu, Chenxi] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Anhui, Peoples R China",,"The oxygen reduction reaction (ORR) has been considered as the rate-limiting step in proton-exchange membrane fuel cells. Therefore, noble metals such as Pt are used as catalysts, which restricts cost reduction. Nonprecious metals have attracted much attention as ORR catalysts, but the low catalytic activity and stability are still challenges associated with their use. Transitionmetal/nitrogen/carbon (M-N-C) materials are widely used due to their low cost and relatively high activity. Electronic, compositional, and geometric effects offered by the metal-support interaction could enhance the catalytic activity and stability. In this study, MXene (Mo2TiC2), with high corrosion resistance and excellent electrical conductivity, is used as a support for Co-N-P-C to construct the Co-N-P-C@Mo2TiC2 catalyst. The half-wave potential of Co-N-P-C@Mo2TiC2 reaches 0.78 V, and the peak power density based on the catalyst reaches 880 mV cm-2. CoN-P-C@Mo2TiC2 exhibits excellent stability in both ORR (only 18 mV loss after 10 000 cycles) and single-cell tests.",nonprecious metals; MXene; metal-organic frameworks; oxygen reduction reaction; proton-exchange membrane fuel cells,ELECTROCATALYSTS,nonprecious metals;MXene;metal-organic frameworks;oxygen reduction reaction;proton-exchange membrane fuel cells;ELECTROCATALYSTS,xuchenxi@hfut.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2574-0962,,,,English,ACS APPL ENERG MATER,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000892614900001,2-s2.0-85143414715,China,hfut.edu.cn,Hefei Univ Technol,"Hefei Univ Technol, China","Ren, Wenqing; Chang, Zhou; Zhang, Jiawei; Wang, Ling; Xu, Chenxi"
"Afsahi, F., Kaliaguine, S.",Non-precious electrocatalysts synthesized from metal-organic frameworks,2014,Journal of Materials Chemistry A,2,31,,12270,12279,,80,10.1039/c4ta02010c,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904409571&doi=10.1039%2Fc4ta02010c&partnerID=40&md5=5410fe0be6b4f9a46a97bc494f6407c4,"Department of Chemical Engineering, Université Laval, Quebec, QC, Canada","Afsahi, Foroughazam, Department of Chemical Engineering, Université Laval, Quebec, QC, Canada; Kaliaguine, Serge C.F., Department of Chemical Engineering, Université Laval, Quebec, QC, Canada","Proton exchange membrane fuel cells (PEMFCs) are considered as clean and efficient energy conversion devices with great potential to replace currently used internal combustion engines (ICEs) in the near future. Developing high-performance and less expensive non-precious metal electrocatalysts for oxygen reduction reaction (ORR) at the cathode side is crucial for widespread application of PEMFCs. Herein an Fe-containing metal-organic framework (MOF) was employed as the sole precursor for preparing a cathode electrocatalyst. The Fe-MOF was synthesized and subsequently subjected to thermolysis under a non-reactive gas atmosphere followed by acid leaching and heat treatment under NH<inf>3</inf> at different temperatures between 700 and 1000 °C. Upon pyrolysis, iron-nitrogen containing carbon active sites (Fe/N/C) were formed in parallel with development of an electronically conductive carbon medium produced through pyrolytic carbonization of the organic component of the MOF material. The prepared electrocatalysts were characterized by XRD, N<inf>2</inf> physisorption, TEM and XPS. In a H<inf>2</inf>SO<inf>4</inf> (pH = 1) electrolyte, the ORR onset potential of 0.915 V, and the half-wave potential of 0.811 V are achieved using the most promising electrocatalyst (C700/950). The membrane electrode assemblies (MEAs) made of these electrocatalysts were also tested as a cathode in a H<inf>2</inf>/air single fuel cell. The most promising electrocatalyst (C700/950) demonstrated an open circuit voltage of 0.945 V and a maximum power density of 0.302 W cm-2 reached at 0.391 V. This journal is © the Partner Organisations 2014.",,Carbon; Carbonization; Cathodes; Crystalline materials; Electrolysis; Electrolytic reduction; Internal combustion engines; Java programming language; Open circuit voltage; Proton exchange membrane fuel cells (PEMFC); Pyrolysis; Energy conversion devices; Half-wave potential; Internal combustion engines (ICEs); Maximum power density; Membrane electrode assemblies; Metal organic framework; Oxygen reduction reaction; Proton exchange membrane fuel cell (PEMFCs); Electrocatalysts,Carbon;Carbonization;Cathodes;Crystalline materials;Electrolysis;Electrolytic reduction;Internal combustion engines;Java programming language;Open circuit voltage;Proton exchange membrane fuel cells (PEMFC);Pyrolysis;Energy conversion devices;Half-wave potential;Internal combustion engines (ICEs);Maximum power density;Membrane electrode assemblies;Metal organic framework;Oxygen reduction reaction;Proton exchange membrane fuel cell (PEMFCs);Electrocatalysts,"S. Kaliaguine; Department of Chemical Engineering, Laval University, QC G1V 0A6, Canada; email: serge.kaliaguine@gch.ulaval.ca",,,,,,Royal Society of Chemistry,20507488,,JMCAE,,English,J. Mater. Chem. A,Article,Scopus,,2-s2.0-84904409571,,Canada,gch.ulaval.ca,,,"Afsahi, F.; Kaliaguine, S."
"Shahbaz, A., Afaf, A., Nawaz, N., Ullah, U., Saher, S.",Non precious metal catalysts: A fuel cell and ORR study of thermally synthesized nickel and platinum mixed nickel nanotubes for PEMFC,2021,Key Engineering Materials,875 KEM,,,193,199,,6,10.4028/www.scientific.net/KEM.875.193,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85101969601&doi=10.4028%2Fwww.scientific.net%2FKEM.875.193&partnerID=40&md5=d0848df4c008961eafab5e70b9adb033,"University of Engineering and Technology, Peshawar, Peshawar, Khyber Pakhtunkhwa, Pakistan; National University of Sciences and Technology, Islamabad, Pakistan","Shahbaz, Ahmad, University of Engineering and Technology, Peshawar, Peshawar, Khyber Pakhtunkhwa, Pakistan; Afaf, Ali, University of Engineering and Technology, Peshawar, Peshawar, Khyber Pakhtunkhwa, Pakistan; Nawaz, Tahir, National University of Sciences and Technology, Islamabad, Pakistan; Ullah, Abid, University of Engineering and Technology, Peshawar, Peshawar, Khyber Pakhtunkhwa, Pakistan; Saher, Saim, University of Engineering and Technology, Peshawar, Peshawar, Khyber Pakhtunkhwa, Pakistan","A highly active Platinum Group Metal (PGM) and non-PGM electrocatalysts with thermally extruded nanotubes have been prepared for Proton Exchange Membrane (PEM) fuel cell by sintering Nickel zeolitic imidazole framework (Ni-ZIF). Preeminent electro-catalytic activities have been observed through single fuel cell tests and rotating disk electrode (RDE). This study involves the comparison of Oxygen Reduction Reaction (ORR) activities and fuel cell (FC) test station performance of two catalyst Nickel and Platinum mixed Nickel nanotubes (Ni NT, Ni/Pt NT) respectively. The acidic cells with corresponding Ni and Ni/Pt catalysts delivers peak power densities of 325 mWcm-2 and 455 mWcm-2 at 75°C inside fuel cell. Our results indicate that, the synthesized Nickel nanotubes has profound effect on catalytic performance of both PGM and non-PGM electro catalysts. © 2021 Trans Tech Publications Ltd, Switzerland.",Catalyst; Fuel Cell; Nanotubes; Non PGM; Oxygen Reduction Reaction; PEMFC; ZIF,Catalyst activity; Economic geology; Electrocatalysts; Electrolytic reduction; Nanotubes; Nickel; Oxygen reduction reaction; Platinum; Sintering; Catalytic performance; Electrocatalytic activity; Non-precious metal catalysts; Peak power densities; Platinum group metals; Rotating disk electrodes; Single fuels; Test station; Proton exchange membrane fuel cells (PEMFC),Catalyst;Fuel Cell;Nanotubes;Non PGM;Oxygen Reduction Reaction;PEMFC;ZIF;Catalyst activity;Economic geology;Electrocatalysts;Electrolytic reduction;Nickel;Platinum;Sintering;Catalytic performance;Electrocatalytic activity;Non-precious metal catalysts;Peak power densities;Platinum group metals;Rotating disk electrodes;Single fuels;Test station;Proton exchange membrane fuel cells (PEMFC),"S. Saim; Department of Renewable Energy Engineering USPCAS-E UET, Peshawar, Pakistan; email: s.saher@uetpeshawar.edu.pk","Asim, M.M.; Bhatty, M.B.; Mansoor, M.; Ikram, T.",,"16th International Symposium on Advanced Materials, ISAM 2019",Islamabad,2019-10-21 through 2019-10-25,Trans Tech Publications Ltd,10139826,9783035713657; 9783038357155; 9783035726473; 9783035711363; 087849300X; 9783035711684; 9783037857083; 0878492844; 9783038354253; 9783035716382,KEMAE,,English,Key Eng Mat,Conference paper,Scopus,,2-s2.0-85101969601,,Pakistan,uetpeshawar.edu.pk,,,"Shahbaz, A.; Afaf, A.; Nawaz, N.; Ullah, U.; Saher, S."
"Tricas, N., Herranz, J., Lefevre, M., Dodelet, J.P., Borros, S.",Non precious metal catalysts for O2 reduction in pemfc applications,2006,,4,,,2926,2934,,0,,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84875616952&partnerID=40&md5=2d49fd1e3a8884183e3503c0630e5602,"Institut Químic de Sarrià, Barcelona, Barcelona, Spain; Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada","Tricás, Núria, Institut Químic de Sarrià, Barcelona, Barcelona, Spain; Herranz, Juan, Institut Químic de Sarrià, Barcelona, Barcelona, Spain; Lefèvre, Michel, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Dodelet, Jean Pol, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Borrós, Salvador, Institut Químic de Sarrià, Barcelona, Barcelona, Spain","There is a need for a non-precious metal oxygen reduction catalyst in Polymer Electrolyte Membrane Fuel Cells (PEMFC). In this work two plasma reactors were optimized to treat carbon black powders, which are used as the support for these catalysts. The aim of this treatment is to obtain nitrogen-bearing functionalities on the carbonaceous surface that will be able to coordinate iron ions in order to catalyze the oxygen reduction reaction (ORR). Different carbon supports as well as several conditions during the plasma treatments have been evaluated. The final materials were characterized by means of XPS and pH measurements. After loading the plasma treated carbon with iron, followed by a pyrolysis treatment, the material was tested for its catalytic activity using a Rotating Disk Electrode (RDE). The results show that plasma modification is effective in producing non-precious metal catalysts on selected carbon black powders like carbon N134, but it is detrimental for a carbon black like Vulcan. Copyright © (2006) by AFHYPAC.",Carbon black; Free noble metal catalyst; Oxygen reduction; Plasma modification,Carbonaceous surface; Noble metal catalysts; Non-precious metal catalysts; Oxygen Reduction; Oxygen reduction catalysts; Oxygen reduction reaction; Plasma modifications; Rotating disk electrodes; Carbon black; Electrolytic reduction; Hydrogen; Loading; Metal ions; Plasmas; Powders; Precious metals; Proton exchange membrane fuel cells (PEMFC); Rotating disks; Catalysts,Carbon black;Free noble metal catalyst;Oxygen reduction;Plasma modification;Carbonaceous surface;Noble metal catalysts;Non-precious metal catalysts;Oxygen reduction catalysts;Oxygen reduction reaction;Plasma modifications;Rotating disk electrodes;Electrolytic reduction;Hydrogen;Loading;Metal ions;Plasmas;Powders;Precious metals;Proton exchange membrane fuel cells (PEMFC);Rotating disks;Catalysts,,,,"16th World Hydrogen Energy Conference 2006, WHEC 2006",,,,,9781622765409,,,English,"World Hydrogen Energy Conf., WHEC",Conference paper,Scopus,,2-s2.0-84875616952,,Spain;Canada,No email,,,"Tricas, N.; Herranz, J.; Lefevre, M.; Dodelet, J.-P.; Borros, S."
"Kumaraguru, S.P., Popov, B.N.",Non precious metal catalysts for pemfc applications,2005,,,,,10889,,,0,,https://www.scopus.com/inward/record.uri?eid=2-s2.0-33645637126&partnerID=40&md5=d6ba830599fabb12795819ec3691df99,,"Kumaraguru, Swaminatha Prabu, ; Popov, Branko N., ","Recent advances have made Proton Exchange Membrane Fuel Cells (PEMFC) a leading alternative to internal combustion and diesel engine transportation. A major impediment in the commercialization of the fuel cell technology is the high content of supported platinum electrocatalysts used for oxygen reduction and the cost involved. Presently Pt and Pt alloys are widely used as anode and cathode materials. Despite a cathodic overpotential loss of 20%, Pt and its alloys are still preferred for their resistance towards corrosion in acidic media. Pt however, being an expensive metal of low abundance, it is of interest for researchers to develop a corrosion resistant non noble metal substitutes. Development of selective oxygen reduction non noble catalyst is also of interest for Direct Methanol Fuel Cells (DMFC), where methanol cross over and oxidation of methanol at the cathode remains an impeding factor for its commercialization. In the last few years, several transition metal compounds have been proposed as oxygen reduction reaction (ORR) selective catalyst. Co based macrocyclic compounds have shown improved activity towards oxygen reduction. However, in addition to their expensive nature, such macrocyclic compounds are highly instable in acidic media. The objective of the present study is to generate MN4 structures from low cost organic precursors with improved activity and stability. Co based metal catalysts from nitrogen donating organic compounds were synthesized and characterized. The catalysts synthesized exhibit, four electron reduction of molecular oxygen and improved activity in comparison with other state of art non precious metal catalysts. The effect of Co wt%, Co: nitrogen ratio, heat treatment temperature and nature carbon substrate on the activity were studied and optimized. Influence of different surface groups on carbon such as N,O and S were studied with the objective of improving the activity and stability of the non noble metal catalysts. The obtained catalysts show comparable performance with ETEK 20% Pt/C catalysts under RRDE test conditions.",,Catalysts; Combustion; Ion exchange; Oxygen; Synthesis (chemical); Carbon substrate; Direct Methanol Fuel Cells (DMFC); Oxygen reduction; Oxygen reduction reaction (ORR); Fuel cells,Catalysts;Combustion;Ion exchange;Oxygen;Synthesis (chemical);Carbon substrate;Direct Methanol Fuel Cells (DMFC);Oxygen reduction;Oxygen reduction reaction (ORR);Fuel cells,,,,05AIChE: 2005 AIChE Annual Meeting and Fall Showcase,,,,,9780816910502; 9780816910755; 9780816910052; 9780816910670; 9780816910120; 9780816910236; 9780816910649; 0816909962; 081691012X; 9780816910229,,,English,AIChE Annu. Meet. Conf. Proc.,Conference paper,Scopus,,2-s2.0-33645637126,2-s2.0-33646753461,,No email,,,"Kumaraguru, S.P.; Popov, B.N."
"Othman, R., Dicks, A.L., Zhu, Z.H.",Non precious metal catalysts for the PEM fuel cell cathode,2012,INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,37,1,,357,372,16,351,10.1016/j.ijhydene.2011.08.095,,"[Othman, Rapidah; Dicks, Andrew L.; Zhu, Zhonghua] Univ Queensland, Sch Chem Engn, St Lucia, Qld 4072, Australia",,"Low temperature fuel cells, such as the proton exchange membrane (PEM) fuel cell, have required the use of highly active catalysts to promote both the fuel oxidation at the anode and oxygen reduction at the cathode. Attention has been particularly given to the oxygen reduction reaction (ORR) since this appears to be responsible for major voltage losses within the cell. To provide the requisite activity and minimse losses, precious metal catalysts (containing Pt) continue to be used for the cathode catalyst. At the same time, much research is in progress to reduce the costs associated with Pt cathode catalysts, by identifying and developing non-precious metal alternatives. This review outlines classes of non-precious metal systems that have been investigated over the past 10 years. Whilst none of these so far have provided the performance and durability of Pt systems some, such as transition metals supported on porous carbons, have demonstrated reasonable electrocatalytic activity. Of the newer catalysts, iron-based nanostructures on nitrogen-functionalised mesoporous carbons are beginning to emerge as possible contenders for future commercial PEMFC systems. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.",Non-precious metal; PEM fuel cell; Catalysts; Cathode; Oxygen reduction reaction,MOLECULAR-OXYGEN-REDUCTION; FE-BASED CATALYSTS; O-2 ELECTROREDUCTION; NONNOBLE ELECTROCATALYST; HEAT-TREATMENT; CARBON; MECHANISM; STABILITY; KINETICS; CHALCOGENIDES,Non-precious metal;PEM fuel cell;Catalysts;Cathode;Oxygen reduction reaction;MOLECULAR-OXYGEN-REDUCTION;FE-BASED CATALYSTS;O-2 ELECTROREDUCTION;NONNOBLE ELECTROCATALYST;HEAT-TREATMENT;CARBON;MECHANISM;STABILITY;KINETICS;CHALCOGENIDES,a.dicks@uq.edu.au,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0360-3199,,,,English,INT J HYDROGEN ENERG,Review,WoS,Chemistry; Electrochemistry; Energy & Fuels,WOS:000300470000036,2-s2.0-84655162784,Australia,uq.edu.au,Univ Queensland,"Univ Queensland, Australia","Othman, Rapidah; Dicks, Andrew L.; Zhu, Zhonghua"
"Barkholtz, H.M., Chong, L., Kaiser, Z.B., Liu, D.J.",Non-Precious Metal Catalysts Prepared By Zeolitic Imidazolate Frameworks: The Ligand Influence to Morphology and Performance,2016,FUEL CELLS,16,4,,428,433,6,12,10.1002/fuce.201500164,,"[Barkholtz, H. M.; Chong, L.; Kaiser, Z. B.; Liu, D. J.] Argonne Natl Lab, Chem Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA",,"A new, one-pot synthesis to produce highly active non-PGM electrocatalysts for PEM fuel cells was previously developed by pyrolyzing Fe doped zeolitic imidazolate framework (ZIF) materials prepared by solid-state interaction. Excellent catalytic oxygen reduction reaction (ORR) activities were found through rotating ring-disk electrode (RRDE) and single fuel cell tests. In this study, we compared the ORR activities and structural properties of two catalysts derived from ZIFs containing imidazole and methyl imidazole ligands, respectively. Our results indicate that alkyl group substitution in the imidazolate ligand has a profound effect on the final catalyst performance.",Catalyst; Fuel Cells; Metal-Organic Frameworks; Non-PGM; Oxygen Reduction; PEMFC,OXYGEN REDUCTION REACTION; NITROGEN-DOPED CARBON; ORGANIC FRAMEWORKS; ELECTROCATALYSTS; GRAPHENE; BLACK,Catalyst;Fuel Cells;Metal-Organic Frameworks;Non-PGM;Oxygen Reduction;PEMFC;OXYGEN REDUCTION REACTION;NITROGEN-DOPED CARBON;ORGANIC FRAMEWORKS;ELECTROCATALYSTS;GRAPHENE;BLACK,djliu@anl.gov,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",5th European PEFC and H2 Forum (EFCF),"Lucerne, SWITZERLAND","JUN 30-JUL 03, 2015",WILEY-V C H VERLAG GMBH,1615-6846,,,,English,FUEL CELLS,Article; Proceedings Paper,WoS,Electrochemistry; Energy & Fuels,WOS:000382557300004,2-s2.0-84987940123,United States,anl.gov,Argonne Natl Lab,"Argonne Natl Lab, United States","Barkholtz, H. M.; Chong, L.; Kaiser, Z. B.; Liu, D. J."
"Ratso, S., Zitolo, A., Kaarik, M., Merisalu, M., Kikas, A., Kisand, V., Rahn, M., Paiste, P., Leis, J., Sammelselg, V., Holdcroft, S., Jaouen, F., Tammeveski, K.",Non-precious metal cathodes for anion exchange membrane fuel cells from ball-milled iron and nitrogen doped carbide-derived carbons,2021,Renewable Energy,167,,,800,810,,66,10.1016/j.renene.2020.11.154,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097457734&doi=10.1016%2Fj.renene.2020.11.154&partnerID=40&md5=e6d68f8e04a99631824615340ccbdea7,"Institute of Chemistry, Tartu Ülikool, Tartu, Tartumaa, Estonia; SOLEIL Synchrotron, Gif-sur-Yvette, France; Institute of Physics, Tartu Ülikool, Tartu, Tartumaa, Estonia; Tartu Ülikool, Tartu, Tartumaa, Estonia; Department of Chemistry, Simon Fraser University, Burnaby, BC, Canada; Université de Montpellier, Montpellier, Occitanie, France","Ratso, Sander, Institute of Chemistry, Tartu Ülikool, Tartu, Tartumaa, Estonia; Zitolo, Andrea, SOLEIL Synchrotron, Gif-sur-Yvette, France; Käärik, Maike, Institute of Chemistry, Tartu Ülikool, Tartu, Tartumaa, Estonia; Merisalu, Maido, Institute of Physics, Tartu Ülikool, Tartu, Tartumaa, Estonia; Kikas, Arvo, Institute of Physics, Tartu Ülikool, Tartu, Tartumaa, Estonia; Kisand, Vambola, Institute of Physics, Tartu Ülikool, Tartu, Tartumaa, Estonia; Rähn, Mihkel, Institute of Physics, Tartu Ülikool, Tartu, Tartumaa, Estonia; Paiste, Päärn, Tartu Ülikool, Tartu, Tartumaa, Estonia; Leis, Jaan, Institute of Chemistry, Tartu Ülikool, Tartu, Tartumaa, Estonia; Sammelselg, Väino, Institute of Physics, Tartu Ülikool, Tartu, Tartumaa, Estonia; Holdcroft, Steven J., Department of Chemistry, Simon Fraser University, Burnaby, BC, Canada; Jaouen, Frédéric, Université de Montpellier, Montpellier, Occitanie, France; Tammeveski, Kaido, Institute of Chemistry, Tartu Ülikool, Tartu, Tartumaa, Estonia","Iron and nitrogen doping of carbon materials is one of the promising pathways towards replacing Pt/C in polymer electrolyte fuel cell cathodes. Here, we show a synthesis method to produce highly active non-precious metal catalysts and study the effect of synthesis parameters on the oxygen reduction reaction (ORR) activity in high-pH conditions. The electrocatalysts are prepared by functionalizing silicon carbide-derived carbon (SiCDC) with 1,10-phenanthroline, iron(II)acetate and, optionally polyvinylpyrrolidone, by ball-milling with ZrO<inf>2</inf> in dry or wet conditions, followed by pyrolysis at 800 °C. The catalysts are characterized by scanning and transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, N<inf>2</inf> physisorption and inductively coupled plasma mass spectrometry. By optimizing the ball-milling conditions, we achieved a reduction in the size of SiCDC grains from >1 μm to 200 nm without negatively affecting the high BET area of catalysts derived from SiCDC. This resulted in increased ORR activity in both rotating disk electrode and anion exchange membrane fuel cell (AEMFC) environments, and improved mass-transport properties of the cathode layer in fuel cell. The ORR activity at 0.9 V in AEMFC of the optimized iron and nitrogen-doped SiCDC reaches 52 mA cm−2, exceeding that of a Pt/C cathode at 36.5 mA cm−2. © 2020 Elsevier Ltd",Anion exchange membrane fuel cell; Ball-milling; Carbide-derived carbon; Electrocatalysis; Fe-Nx site; Oxygen reduction,"Alkaline fuel cells; Ball milling; Carbon; Cathodes; Doping (additives); Electrocatalysts; Electrolytic reduction; High resolution transmission electron microscopy; Ion exchange membranes; Mass spectrometry; Milling (machining); Oxygen reduction reaction; Polyelectrolytes; Precious metals; Proton exchange membrane fuel cells (PEMFC); Scanning electron microscopy; Silicon carbide; X ray absorption spectroscopy; X ray photoelectron spectroscopy; Zirconia; 1 ,10-phenanthroline; Anion-exchange membrane fuel cells; Carbide derived carbon; Non-precious metal catalysts; Poly vinyl pyrrolidone; Polymer electrolyte fuel cells; Rotating disk electrodes; Scanning and transmission electron microscopy; Iron compounds; absorption; biochemical oxygen demand; electrode; electrolyte; fuel cell; ion exchange; membrane; nitrogen; pyrolysis; reduction; silicon","Anion exchange membrane fuel cell;Ball-milling;Carbide-derived carbon;Electrocatalysis;Fe-Nx site;Oxygen reduction;Alkaline fuel cells;Ball milling;Carbon;Cathodes;Doping (additives);Electrocatalysts;Electrolytic reduction;High resolution transmission electron microscopy;Ion exchange membranes;Mass spectrometry;Milling (machining);Oxygen reduction reaction;Polyelectrolytes;Precious metals;Proton exchange membrane fuel cells (PEMFC);Scanning electron microscopy;Silicon carbide;X ray absorption spectroscopy;X ray photoelectron spectroscopy;Zirconia;1 ,10-phenanthroline;Anion-exchange membrane fuel cells;Carbide derived carbon;Non-precious metal catalysts;Poly vinyl pyrrolidone;Polymer electrolyte fuel cells;Rotating disk electrodes;Scanning and transmission electron microscopy;Iron compounds;absorption;biochemical oxygen demand;electrode;electrolyte;fuel cell;ion exchange;membrane;nitrogen;pyrolysis;reduction;silicon","K. Tammeveski; Institute of Chemistry, University of Tartu, Tartu, Ravila 14a, 50411, Estonia; email: kaido.tammeveski@ut.ee; F. Jaouen; ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France; email: frederic.jaouen@umontpellier.fr",,,,,,Elsevier Ltd,09601481,9780123750259,,,English,Renew. Energy,Article,Scopus,,2-s2.0-85097457734,,Estonia;France;Canada,ut.ee,,,"Ratso, S.; Zitolo, A.; Kaarik, M.; Merisalu, M.; Kikas, A.; Kisand, V.; Rahn, M.; Paiste, P.; Leis, J.; Sammelselg, V.; Holdcroft, S.; Jaouen, F.; Tammeveski, K."
"Kiani, M., Tian, X.Q., Zhang, W.X.","Non-precious metal electrocatalysts design for oxygen reduction reaction in polymer electrolyte membrane fuel cells: Recent advances, challenges and future perspectives",2021,COORDINATION CHEMISTRY REVIEWS,441,,213954,,,21,95,10.1016/j.ccr.2021.213954,,"[Kiani, Maryam; Tian, Xiao Qing] Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Guangdong, Peoples R China; [Kiani, Maryam; Zhang, Wenxing] Hanshan Normal Univ, Coll Mat Sci & Engn, Chaozhou 521041, Guangdong, Peoples R China",,"The problem of renewable energy is appealing owing to cumulative power demand, the randomness of the increasing oil costs, and environmental issues. Amongst the numerous renewable energy sources, the fuel cell is acquiring more attractiveness owing to their higher efficiency, cleanliness, and cost-effective supply of power required by the clients. The key issue in the extensive commercial applications of polymer electrolyte membrane fuel cell is the usage of platinum based catalyst that is essentially required for the feasible oxygen reduction reaction. The enhancement of ORR performance, stability, and low cost are the main concerns of the non-precious metals catalyst. This review is focused on the development in non-precious nanomaterial-based electrocatalysts and emphasis to the several kinds of non-noble electrocatalysts with enhanced ORR efficiency. Future prospective and directions are suggested in this review for the further improvement in the strategy to the design and development of highly efficient and low-cost electrocatalyst for polymer electrolyte membrane fuel cells. (C) 2021 Elsevier B.V. All rights reserved.",Fuel cells; Oxygen reduction reaction; Electrocatalysis; Non-precious metal electrocatalyst,SINGLE-ATOM CATALYSTS; DOPED POROUS CARBON; GAS-DIFFUSION ELECTRODES; HIGH-SURFACE-AREA; HIGHLY EFFICIENT ELECTROCATALYSTS; ROOM-TEMPERATURE SYNTHESIS; ORGANIC FRAMEWORKS; HIGH-PERFORMANCE; PARTICLE-SIZE; BIFUNCTIONAL ELECTROCATALYSTS,Fuel cells;Oxygen reduction reaction;Electrocatalysis;Non-precious metal electrocatalyst;SINGLE-ATOM CATALYSTS;DOPED POROUS CARBON;GAS-DIFFUSION ELECTRODES;HIGH-SURFACE-AREA;HIGHLY EFFICIENT ELECTROCATALYSTS;ROOM-TEMPERATURE SYNTHESIS;ORGANIC FRAMEWORKS;HIGH-PERFORMANCE;PARTICLE-SIZE;BIFUNCTIONAL ELECTROCATALYSTS,xqtian@szu.edu.cn,,"PO BOX 564, 1001 LAUSANNE, SWITZERLAND",,,,ELSEVIER SCIENCE SA,0010-8545,,,,English,COORDIN CHEM REV,Review,WoS,Chemistry,WOS:000649838500001,2-s2.0-85105360140,China,szu.edu.cn,Shenzhen Univ;Hanshan Normal Univ,"Shenzhen Univ, China;Hanshan Normal Univ, China","Kiani, Maryam; Tian, Xiao Qing; Zhang, Wenxing"
"Jafari, T., Meguerdichian, A.G., Jiang, T., El-Sawy, A., Suib, S.L.",Non-precious Metal Oxide and Metal-free Catalysts for Energy Storage and Conversion,2017,ADVANCED ELECTRODE MATERIALS,,,,243,320,78,2,,,"[Jafari, Tahereh; Meguerdichian, Andrew G.; El-Sawy, Abdelhamid; Suib, Steven L.] Univ Connecticut, Inst Mat Sci, Storrs, CT 06269 USA; [Jiang, Ting; Suib, Steven L.] Univ Connecticut, Dept Chem & Biomol Engn, Storrs, CT 06269 USA; [El-Sawy, Abdelhamid; Suib, Steven L.] Univ Connecticut, Dept Chem, Storrs, CT 06269 USA; [El-Sawy, Abdelhamid] Tanta Univ, Dept Chem, Fac Sci, Tanta, Egypt",,"As primary energy demands will double within the next two decades, energy storage and conversion will be among the most significant concerns of the current century. Promising methods for energy storage and conversion include super-capacitors, batteries, and fuel cells. Electrode materials for fuel cells lead to important reactions such as oxygen evolution reactions (OERs), hydrogen evolution reactions (HERs), and oxygen reduction reactions (ORRs). In metal-air batteries and fuel cells, the most sluggish reaction is the ORR reaction which is the bottleneck of numerous electrochemical reactions. Key electrocatalytic reactions occur at the cathode of a proton exchange membrane fuel cell. Different types of advanced electrode materials have been designed to fulfill the global need for energy which can be categorized as follows: (1) noble metal-based and (2) nonnoble metal catalysts. The latter, which will be the focus of this chapter, includes (I) transition metal-nitrogen-carbon catalysts; (II) transition metal oxides, chalcogenides, nitride, and oxynitrides; and (III) metal-free catalysts. Researchers globally are investigating alternatives for state-of-the-art catalysts such as Pt/ C and Ir/C for fuel cells in ORR-HER and OER, respectively. Therefore, the motivation in this research is to study inexpensive materials that have high activity, stability, and resistance to methanol crossover effects for ORR-HER and OER reactions.",Energy storage devices; proton exchange membrane fuel cell (PEMFC); hydrogen evolution reaction (HER); oxygen reduction reaction (ORR); oxygen evolution reaction (OER); non-noble metal catalysts; transition etal-nitrogen-carbon catalysts; transition metal oxides; chalcogenides; nitrides and oxynitrides catalysts; metal-free catalysts,OXYGEN REDUCTION REACTION; NITROGEN-DOPED GRAPHENE; COVALENT ORGANIC FRAMEWORK; HIGH-PERFORMANCE ELECTROCATALYSTS; PYROLYZED COBALT PHTHALOCYANINE; HYDROGEN EVOLUTION REACTION; SENSITIZED SOLAR-CELLS; ONE-STEP SYNTHESIS; ACTIVE EDGE SITES; PEM FUEL-CELLS,Energy storage devices;proton exchange membrane fuel cell (PEMFC);hydrogen evolution reaction (HER);oxygen reduction reaction (ORR);oxygen evolution reaction (OER);non-noble metal catalysts;transition etal-nitrogen-carbon catalysts;transition metal oxides;chalcogenides;nitrides and oxynitrides catalysts;metal-free catalysts;OXYGEN REDUCTION REACTION;NITROGEN-DOPED GRAPHENE;COVALENT ORGANIC FRAMEWORK;HIGH-PERFORMANCE ELECTROCATALYSTS;PYROLYZED COBALT PHTHALOCYANINE;HYDROGEN EVOLUTION REACTION;SENSITIZED SOLAR-CELLS;ONE-STEP SYNTHESIS;ACTIVE EDGE SITES;PEM FUEL-CELLS,steven.suib@uconn.edu,"Tiwari, A; Kuralay, F; Uzun, L","100 CUMMINGS CENTER, STE 541J, BEVERLY, MA 01915-6106 USA",,,,SCRIVENER PUBLISHING LLC,,978-1-119-24265-9; 978-1-119-24252-9,,,English,ADV MATER SER,Article; Book Chapter,WoS,Engineering; Materials Science,WOS:000458718400008,,United States;Egypt,uconn.edu,Univ Connecticut;Tanta Univ,"Univ Connecticut, United States;Tanta Univ, Egypt","Jafari, Tahereh; Meguerdichian, Andrew G.; Jiang, Ting; El-Sawy, Abdelhamid; Suib, Steven L."
"Zelenay, P., Chung, H.T., Wu, G.",Non-precious metal oxygen reduction catalysts for fuel cells: A good or a bad idea?,2013,,,,,147,148,,0,,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84926361145&partnerID=40&md5=11f86a3b2024eafc1ed68a2ce42add62,"Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States","Zelenay, Piotr S., Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Chung, Hoon Taek, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Wu, Gang, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States","Non-precious metal catalysts (NPMCs) have shown promising activity towards oxygen reduction reaction (ORR), both in basic and acidic media. However, the use of NPMCs in acidic Nafion®-based polymer electrolyte fuel cells has been hampered by relatively low activity and stability when compared to platinum-based catalysts. In order to overcome these issues, a new class of ORR NPMCs was developed that involves heat treatment as a key step in the NPMC synthesis. This presentation provides a review of the progress in research on heattreated non-precious metal catalysts, with an emphasis on the efforts focusing on the active site identification and correlation between catalyst performance and morphology. © © 2013 Delta Energy and Environment.",Electrocatalysis; Non-precious metal catalysts; Oxygen reduction; Polymer electrolyte fuel cells,Catalyst activity; Electrocatalysis; Electrolytic reduction; Fuel cells; Gas fuel purification; Metals; Oxygen; Polyelectrolytes; Precious metals; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Synthesis (chemical); Catalyst performance; Non-precious metal catalysts; Non-precious metals; Oxygen Reduction; Oxygen reduction catalysts; Oxygen reduction reaction; Platinum based catalyst; Polymer electrolyte fuel cells; Catalysts,Electrocatalysis;Non-precious metal catalysts;Oxygen reduction;Polymer electrolyte fuel cells;Catalyst activity;Electrolytic reduction;Fuel cells;Gas fuel purification;Metals;Oxygen;Polyelectrolytes;Precious metals;Proton exchange membrane fuel cells (PEMFC);Solid electrolytes;Synthesis (chemical);Catalyst performance;Non-precious metals;Oxygen reduction catalysts;Oxygen reduction reaction;Platinum based catalyst;Catalysts,,"Cigolotti, V.; Barchiesi, C.; Chianella, M.",,"5th European Fuel Cell Piero Lunghi Conference and Exhibition, EFC 2013",Rome,2013-12-11 through 2013-12-13,ENEA,,9788882862978,,,English,EFC - Proc. Eur. Fuel Cell Piero Lunghi Conf.,Conference paper,Scopus,,2-s2.0-84926361145,,United States,No email,,,"Zelenay, P.; Chung, H.T.; Wu, G."
"Zhou, Z.H., Liu, Y.J., Zhang, J.H., Pang, H., Zhu, G.X.",Non-precious nickel-based catalysts for hydrogen oxidation reaction in alkaline electrolyte,2020,ELECTROCHEMISTRY COMMUNICATIONS,121,,106871,,,10,38,10.1016/j.elecom.2020.106871,,"[Zhou, Zhihang; Liu, Yuanjun; Zhang, Junhao] Jiangsu Univ Sci & Technol, Sch Environm & Chem Engn, Zhenjiang, Jiangsu, Peoples R China; [Pang, Huan] Yangzhou Univ, Sch Chem & Chem Engn, Yangzhou, Jiangsu, Peoples R China; [Zhu, Guoxing] Jiangsu Univ, Sch Chem & Chem Engn, Zhenjiang, Jiangsu, Peoples R China",,"With the rapid development of anion exchange membranes, researchers began to shift their attention from proton exchange membrane fuel cells (PEMFCs) with acid electrolytes to anion exchange membrane fuel cells (AEMFCs) with alkaline electrolytes. Non-precious metal catalysts such as Fe-N-C catalysts are available for ORR at the cathode in alkaline electrolytes. But at the anode, the catalytic reaction kinetics of Pt catalysts in alkaline media is two orders of magnitude slower than that in acid media, which prompts researchers to develop new low-cost and high-efficient non-precious metal catalysts for HOR. Up to date, the typical non-precious metal catalysts for HOR are Ni-based materials. In this minireview, we firstly introduced the elementary steps of HOR and the important activity parameters for a HOR catalyst. Secondly, we briefly describe the performance of various Ni-based HOR catalysts reported in recent years.",Alkaline Electrolyte Fuel Cells; Hydrogen Oxidation Reaction; Non-precious Metal Catalyst; Stability; Reaction Mechanism,OXYGEN REDUCTION REACTION; EVOLUTION REACTION ACTIVITY; ELECTROCATALYTIC ACTIVITY; ALLOY ELECTROCATALYSTS; NI NANOPARTICLES; RECENT PROGRESS; FUEL-CELLS; PLATINUM; ENERGY; CARBON,Alkaline Electrolyte Fuel Cells;Hydrogen Oxidation Reaction;Non-precious Metal Catalyst;Stability;Reaction Mechanism;OXYGEN REDUCTION REACTION;EVOLUTION REACTION ACTIVITY;ELECTROCATALYTIC ACTIVITY;ALLOY ELECTROCATALYSTS;NI NANOPARTICLES;RECENT PROGRESS;FUEL-CELLS;PLATINUM;ENERGY;CARBON,liuyuanjun@just.edu.cn; panghuan@yzu.edu.cn; zhuguoxing@ujs.edu.cn,,"STE 800, 230 PARK AVE, NEW YORK, NY 10169 USA",,,,ELSEVIER SCIENCE INC,1388-2481,,,,English,ELECTROCHEM COMMUN,Review,WoS,Electrochemistry,WOS:000605594000003,,China,just.edu.cn,Jiangsu Univ Sci & Technol;Yangzhou Univ;Jiangsu Univ,"Jiangsu Univ Sci & Technol, China;Yangzhou Univ, China;Jiangsu Univ, China","Zhou, Zhihang; Liu, Yuanjun; Zhang, Junhao; Pang, Huan; Zhu, Guoxing"
"Cosenza, A., Delafontaine, L., Ly, A., Wang, H., Murphy, E., Liu, Y., Specchia, S., Atanassov, P.",Novel acid-free process intensification for the synthesis of non-precious metal-nitrogen-carbon electrocatalysts for oxygen reduction reaction,2023,Journal of Power Sources,556,,232382,,,,15,10.1016/j.jpowsour.2022.232382,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85145596376&doi=10.1016%2Fj.jpowsour.2022.232382&partnerID=40&md5=8a78a5bf6ed02a6f1194434c1ac7d03a,"National Fuel Cell Research Center, Samueli School of Engineering, Irvine, CA, United States; Samueli School of Engineering, Irvine, CA, United States; Department of Applied Science and Technology, Politecnico di Torino, Turin, TO, Italy","Cosenza, Alessio, National Fuel Cell Research Center, Samueli School of Engineering, Irvine, CA, United States, Department of Applied Science and Technology, Politecnico di Torino, Turin, TO, Italy; Delafontaine, Laurent, National Fuel Cell Research Center, Samueli School of Engineering, Irvine, CA, United States; Ly, Alvin, National Fuel Cell Research Center, Samueli School of Engineering, Irvine, CA, United States; Wang, Hanson, National Fuel Cell Research Center, Samueli School of Engineering, Irvine, CA, United States; Murphy, Eamonn, National Fuel Cell Research Center, Samueli School of Engineering, Irvine, CA, United States; Liu, Yuanchao, National Fuel Cell Research Center, Samueli School of Engineering, Irvine, CA, United States; Specchia, Stefania, Department of Applied Science and Technology, Politecnico di Torino, Turin, TO, Italy; Atanassov, Plamen B., National Fuel Cell Research Center, Samueli School of Engineering, Irvine, CA, United States, Samueli School of Engineering, Irvine, CA, United States","In this work, a set of PGM-free mono-metallic electrocatalysts (Fe<inf>AD</inf>-N-CAF, Co-N-CAF, Mn-N-CAF, Ni-N-CAF) were synthesized using multiple silica templates with a modified acid-free sacrificial support method, characterized and tested for oxygen reduction reaction (ORR) in acidic, neutral and alkaline electrolytes. The removal of the silica template is achieved simultaneously to pyrolysis through the addition of Teflon powder to the mass of precursors before the heat treatment, resulting in a simple, fast and green approach compared to the conventional method based on the use of hydrofluoric acid (HF). Rotating ring disk electrode tests show that the iron-based electrocatalyst, among all, have higher activity for ORR. An electrocatalyst loading study was conducted with Fe<inf>AD</inf>-N-CAF revealing a dual-site reaction mechanism and a maximum activity reached at 700 μg cm−2, while accelerated durability test highlighted its promising stability. This novel synthesis route can be classified as a new intensified sustainable synthesis process. © 2022",M-N-C electrocatalysts; Oxygen reduction; PEMFC; Process intensification; Sustainable synthesis; Teflon powder,Carbon; Durability; Electrolysis; Electrolytic reduction; Hydrofluoric acid; Nitrogen; Oxygen; Powder metals; Proton exchange membrane fuel cells (PEMFC); Silica; Acid-free; M-N-C electrocatalyst; Non-precious metals; Oxygen Reduction; Oxygen reduction reaction; P.E.M.F.C; Process intensification; Silica templates; Sustainable synthesis; Teflon powders; Electrocatalysts,M-N-C electrocatalysts;Oxygen reduction;PEMFC;Process intensification;Sustainable synthesis;Teflon powder;Carbon;Durability;Electrolysis;Electrolytic reduction;Hydrofluoric acid;Nitrogen;Oxygen;Powder metals;Proton exchange membrane fuel cells (PEMFC);Silica;Acid-free;M-N-C electrocatalyst;Non-precious metals;Oxygen reduction reaction;P.E.M.F.C;Silica templates;Teflon powders;Electrocatalysts,"P. Atanassov; Department of Chemical and Biomolecular Engineering, National Fuel Cell Research Center, University of California, Irvine, 92697, United States; email: plamen.atanassov@uci.edu",,,,,,Elsevier B.V.,03787753,0444894810,JPSOD,,English,J Power Sources,Article,Scopus,,2-s2.0-85145596376,,United States;Italy,uci.edu,,,"Cosenza, A.; Delafontaine, L.; Ly, A.; Wang, H.; Murphy, E.; Liu, Y.; Specchia, S.; Atanassov, P."
"Bezerra, C.W.B., Zhang, L., Lee, K.C., Liu, H.S., Zhang, J.L., Shi, Z., Marques, A.L.B., Marques, E.P., Wu, S.H., Zhang, J.J.",Novel carbon-supported Fe-N electrocatalysts synthesized through heat treatment of iron tripyridyl triazine complexes for the PEM fuel cell oxygen reduction reaction,2008,ELECTROCHIMICA ACTA,53,26,,7703,7710,8,149,10.1016/j.electacta.2008.05.030,,"[Bezerra, Cicero W. B.; Zhang, Lei; Lee, Kunchan; Liu, Hansan; Zhang, Jianlu; Wu, Shaohong; Zhang, Jiujun] Natl Res Council Canada, Inst Fuel Cell Innovat, Vancouver, BC V6T 1W5, Canada; [Bezerra, Cicero W. B.; Marques, Edmar P.] Univ Fed Maranhao, Dept Chem, BR-65080040 Sao Luis, MA, Brazil; [Marques, Aldalea L. B.] Univ Fed Maranhao, Dept Chem Technol, Sao Luis, MA, Brazil",,"2,4,6-Tris(2-pyridyl)-1,3,5-triazine (TPTZ) was used as a ligand to prepare iron-TPTZ(Fe-TPTZ) complexes for the development of a new oxygen reduction reaction (ORR) catalyst. The prepared Fe-TPTZ complexes were then heat-treated at temperatures ranging from 400 degrees C to 1100 degrees C to obtain carbon-supported Fe-N catalysts (Fe-N/C). These catalysts were characterized in terms of catalyst composition, structure, and morphology by several instrumental methods such as energy dispersive X-ray, X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy. With respect to the ORR activity, the Fe-NJC catalysts were also evaluated by cyclic voltammetry, as well as rotating disk and ring-disk electrodes. The results showed that among the heat-treated catalysts, that obtained at a heat-treatment temperature of 800 degrees C is the most active ORR catalyst. The overall electron transfer number for the catalyzed ORR was determined to be between 3.5 and 3.8, with 10-30% H2O2 production. The ORR catalytic activity of this catalyst was also tested in a hydrogen-air proton exchange membrane (PEM) fuel cell. At a cell voltage of 0.30V, this fuel cell can give a current density of 0.23 A cm(-2) with a maximum MEA power density of 0.070 W cm(-2) indicating that this catalyst has potential to be used as a non-noble catalyst in PEM fuel cells. Crown Copyright (c) 2008 Published by Elsevier Ltd. All rights reserved.","catalyst carbon support; electrocatalyst; oxygen reduction reaction (ORR); iron (Fe)-nitrogen (N); 2,4,6-Tris(2-pyridyl)-1,3,5-triazine (TPTZ); heat (pyrolysis) treatment; proton exchange membrane (PEM) fuel cell",SPECTROPHOTOMETRIC DETERMINATION; ACTIVE-SITES; CATALYSTS; SURFACE; PYROLYSIS; COBALT; O-2; ELECTROREDUCTION; STABILITY; BLACK,"catalyst carbon support;electrocatalyst;oxygen reduction reaction (ORR);iron (Fe)-nitrogen (N);2,4,6-Tris(2-pyridyl)-1,3,5-triazine (TPTZ);heat (pyrolysis) treatment;proton exchange membrane (PEM) fuel cell;SPECTROPHOTOMETRIC DETERMINATION;ACTIVE-SITES;CATALYSTS;SURFACE;PYROLYSIS;COBALT;O-2;ELECTROREDUCTION;STABILITY;BLACK",jiujun.zhang@nrc.gc.ca,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000259729700015,2-s2.0-49349093999,Canada;Brazil,nrc.gc.ca,Natl Res Council Canada;Univ Fed Maranhao,"Natl Res Council Canada, Canada;Univ Fed Maranhao, Brazil","Bezerra, Cicero W. B.; Zhang, Lei; Lee, Kunchan; Liu, Hansan; Zhang, Jianlu; Shi, Zheng; Marques, Aldalea L. B.; Marques, Edmar P.; Wu, Shaohong; Zhang, Jiujun"
"Kumaraguru, S.P., Popov, B.N.",Novel non noble metal catalysts for oxygen reduction reaction,2006,,,,,,,,0,,https://www.scopus.com/inward/record.uri?eid=2-s2.0-58049123363&partnerID=40&md5=59ef7b35b9212680db1dc0d3e6a91a13,"Molinaroli College of Engineering and Computing, Columbia, SC, United States","Kumaraguru, Swaminatha Prabu, Molinaroli College of Engineering and Computing, Columbia, SC, United States; Popov, Branko N., Molinaroli College of Engineering and Computing, Columbia, SC, United States","Recent advances have made proton exchange membrane fuel cells a leading alternative to internal combustion and diesel engine transportation. A major impediment in the commercialization of the fuel cell technology is the high content of supported platinum electrocatalysts used for oxygen reduction and the cost involved. Development of selective oxygen reduction non noble catalyst is also of interest for direct methanol fuel cells, where methanol cross over and oxidation of methanol at the cathode remains an impeding factor for its commercialization. MN4 structures from low cost organic precursors with improved activity and stability were generated. Co-based metal catalysts from nitrogen donating organic compounds were synthesized. The catalysts synthesized showed four electron reduction of molecular oxygen and improved activity in comparison with other state of art non precious metal catalysts. This is an abstract of a paper presented at the AIChE Annual Meeting (San Francisco, CA 11/12-17/2008).",,,,,,,2006 AIChE Annual Meeting,,,,,9780816910502; 9780816910755; 9780816910052; 9780816910670; 9780816910120; 9780816910236; 9780816910649; 0816909962; 081691012X; 9780816910229,,,English,"AIChE Ann. Meet., Conf. Proc.",Conference paper,Scopus,,2-s2.0-58049123363,,United States,No email,,,"Kumaraguru, S.P.; Popov, B.N."
"Wang, J.T., Li, S., Zhu, G.W., Zhao, W., Chen, R.X., Pan, M.",Novel non-noble metal electrocatalysts synthesized by heat-treatment of iron terpyridine complexes for the oxygen reduction reaction,2013,JOURNAL OF POWER SOURCES,240,,,381,389,9,32,10.1016/j.jpowsour.2013.03.189,,"[Wang, Jiatang; Li, Shang; Zhu, Guangwen; Zhao, Wei; Chen, Ruixin; Pan, Mu] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China",,"2,6-Bis(2-pyridyl)-pyridine (TPY) is used as a ligand to prepare iron-TPY (Fe-TPY) complexes for the development of a new oxygen reduction reaction (ORR) catalyst. The prepared Fe-TPY complexes are then treated at temperatures of 600 degrees C, 700 degrees C, 800 degrees C and 900 degrees C to obtain Fe-N/C catalysts. The molar ratio of Fe/TPY and Fe loadings are also optimized. The results show that the catalyst with Fe loading of 5 wt % obtained via heat-treatment of the Fe-TPY/C (mole ratio of Fe/TPY is 1:5) complex at 800 degrees C is the most active ORR catalyst. The overall electron transfer number for the catalyzed ORR is determined to be 3.7. The result of X-ray photoelectron spectroscopy (XPS) indicates that the atomic N contributing to the ORR activity of Fe-N/C catalyst may be from the pyridinic and graphitic nitrogens formed during heat-treatment. At a cell voltage of 0.21 V, the single cell test results show a current density of 0.38 A cm(-2) with a power density of 0.08 W cm(-2) at 60 degrees C without backpressure, indicating that this catalyst has the potential to be used as a non-noble catalyst in a proton exchange membrane fuel cell. (C) 2013 Elsevier B.V. All rights reserved.","Non-noble metal catalyst; Oxygen reduction reaction; Proton exchange membrane fuel cell; 2,6-Bis(2-pyridy)-pyridine",O BOND FORMATION; CATALYSTS; POLYANILINE; PYROLYSIS; ARRAYS,"Non-noble metal catalyst;Oxygen reduction reaction;Proton exchange membrane fuel cell;2,6-Bis(2-pyridy)-pyridine;O BOND FORMATION;CATALYSTS;POLYANILINE;PYROLYSIS;ARRAYS",lishang@whut.edu.cn,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:000321803700047,2-s2.0-84877272940,China,whut.edu.cn,Wuhan Univ Technol,"Wuhan Univ Technol, China","Wang, Jiatang; Li, Shang; Zhu, Guangwen; Zhao, Wei; Chen, Ruixin; Pan, Mu"
"Jaouen, F., Dodelet, J.P.","O2 Reduction Mechanism on Non-Noble Metal Catalysts for PEM Fuel Cells. Part I: Experimental Rates of O2 Eectroreduction, H2O2 Electroreduction, and H2O2 Disproportionation",2009,JOURNAL OF PHYSICAL CHEMISTRY C,113,34,,15422,15432,11,189,10.1021/jp900837e,,"[Jaouen, Frederic; Dodelet, Jean-Pol] INRS Energie, Varennes, PQ J3X 1S2, Canada",,"One Fe/N/C cathode electrocatalyst for PEM fuel cells with a nominal loading of 0.2 wt % Fe was prepared by heat-treating at 950 degrees C in NH3 a nonmicroporous furnace carbon black impregnated with iron acetate. 02 reduction reaction (ORR) occurs on this catalyst with an apparent 4e transfer, while H2O2 electroreduction is sluggish, thereby minimizing the importance of the peroxide electroreduction pathway. It is also shown that H2O2 disproportionates only slowly into H2O and (1)/O-2(2) on this Fe/N/C catalyst. Therefore, the electrochemical-chemical pathway of O-2 to H2O2 followed by H2O2 disproportionation is minor during ORR. It is concluded that the present Fe/N/C catalyst reduces O-2 to water following mainly a direct 4e pathway. It is also noticed that the initial porosity of the carbon support may drastically influence the ORR mechanism. The same investigation was extended to other M/N/C electrocatalysts, where M = Cr, Mn, Co, Ni, and Cu, prepared according to the same procedure as used for Fe/N/C. A correlation was found between the ORR activity and the activity for H2O2 disproportionation. This is explained by the occurrence of a common rate-limiting intermediate for the two reactions: the oxo-ferryl-like cation radical.",,SCANNING ELECTROCHEMICAL MICROSCOPY; HYDROGEN-PEROXIDE DECOMPOSITION; OXYGEN REDUCTION; CYTOCHROME P450CAM; ACID ELECTROLYTE; CARBON; PORPHYRIN; ELECTROCATALYSTS; CATALASES; SURFACES,SCANNING ELECTROCHEMICAL MICROSCOPY;HYDROGEN-PEROXIDE DECOMPOSITION;OXYGEN REDUCTION;CYTOCHROME P450CAM;ACID ELECTROLYTE;CARBON;PORPHYRIN;ELECTROCATALYSTS;CATALASES;SURFACES,jaouen@emt.inrs.ca; dodelet@emt.inrs.ca,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1932-7447,,,,English,J PHYS CHEM C,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science,WOS:000269017600044,2-s2.0-69549096225,Canada,emt.inrs.ca,INRS Energie,"INRS Energie, Canada","Jaouen, Frederic; Dodelet, Jean-Pol"
"Lu, Y.X., Du, S.F., Steinberger-Wilckens, R.",One-dimensional nanostructured electrocatalysts for polymer electrolyte membrane fuel cells-A review,2016,APPLIED CATALYSIS B-ENVIRONMENTAL,199,,,292,314,23,179,10.1016/j.apcatb.2016.06.022,,"[Lu, Yaxiang; Du, Shangfeng; Steinberger-Wilckens, Robert] Univ Birmingham, Sch Chem Engn, Birmingham B15 2TT, W Midlands, England",,"Recent research on one-dimensional (1D) nanostructured materials brings in tremendous progress on their application as catalysts in polymer electrolyte membrane fuel cells (PEMFCs). The desired 1D nanomaterials with tailored morphology, structure and composition can potentially address many drawbacks faced by conventional Pt/C catalysts. However, their application in practical fuel cell electrodes still faces big challenge due to their unusual morphology and bulky volume. This review focuses on the recent progress from 2010 in 1D electrocatalysts for oxygen reduction reaction (ORR) and hydrocarbon (methanol, ethanol and formic acid) oxidation reaction in PEMFCs, covering Pt-based and non-Pt precious metal nanostructures, as well as non-precious metal catalysts (NPMCs). The correlations between the morphology, composition and catalytic properties of these catalysts are discussed. Critical perspectives are devoted to the increasing gap between the pure materials research and the fuel cell development in this emerging research area (222 references). (C) 2016 Elsevier B.V. All rights reserved.",Nanowire; Nanotube; Electrode; Direct methanol fuel cell (DMFC); Direct formic acid fuel cell (DFAFC),OXYGEN REDUCTION REACTION; HIGH-PERFORMANCE ELECTROCATALYSTS; HIGHLY EFFICIENT ELECTROCATALYST; PD BIMETALLIC NANODENDRITES; SHAPE-CONTROLLED SYNTHESIS; PLATINUM NANOWIRE NETWORK; ALLOY NANOTUBE ARRAYS; CORE-SHELL NANOWIRES; ONE-STEP SYNTHESIS; ONE-POT SYNTHESIS,Nanowire;Nanotube;Electrode;Direct methanol fuel cell (DMFC);Direct formic acid fuel cell (DFAFC);OXYGEN REDUCTION REACTION;HIGH-PERFORMANCE ELECTROCATALYSTS;HIGHLY EFFICIENT ELECTROCATALYST;PD BIMETALLIC NANODENDRITES;SHAPE-CONTROLLED SYNTHESIS;PLATINUM NANOWIRE NETWORK;ALLOY NANOTUBE ARRAYS;CORE-SHELL NANOWIRES;ONE-STEP SYNTHESIS;ONE-POT SYNTHESIS,s.du@bham.ac.uk,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0926-3373,,,,English,APPL CATAL B-ENVIRON,Review,WoS,Chemistry; Engineering,WOS:000382343500027,2-s2.0-84976603462,United Kingdom,bham.ac.uk,Univ Birmingham,"Univ Birmingham, United Kingdom","Lu, Yaxiang; Du, Shangfeng; Steinberger-Wilckens, Robert"
"Dombrovskis, J.K., Palmqvist, A.E.C.",One-pot synthesis of transition metal ion-chelating ordered mesoporous carbon/carbon nanotube composites for active and durable fuel cell catalysts,2017,JOURNAL OF POWER SOURCES,357,,,87,96,10,15,10.1016/j.jpowsour.2017.04.038,,"[Dombrovskis, Johanna K.; Palmqvist, Anders E. C.] Chalmers Univ Technol, Dept Chem & Chem Engn, Appl Chem, SE-41296 Gothenburg, Sweden",,"Development of non-precious metal catalysts for the oxygen reduction reaction (ORR) in proton exchange membrane (PEM) fuel cells with high activity and durability and with optimal water management properties is of outmost technological importance and highly challenging. Here we study the possibilities offered through judicious selection of small molecular precursors used for the formation of ordered mesoporous carbon-based non-precious metal ORR catalysts. By combining two complementary precursors, we present a one-pot synthesis that leads to a composite material consisting of transition metal ion-chelating ordered mesoporous carbon and multi-walled carbon nanotubes (TM-OMC/CNT). The resulting composite materials show high specific surface areas and a carbon structure that exhibits graphitic signatures. The synthesis procedure allows for tuning of the carbon structure, the surface area, the pore volume and the ratio of the two components of the composite. The TM-OMC/CNT composites were processed into membrane electrode assemblies and evaluated in single cell fuel cell measurements where they showed a combination of good ORR activity and very high durability. (C) 2017 Elsevier B.V. All rights reserved.",PEM fuel cell; Non-precious metal catalyst; Cyanamide; Ordered mesoporous carbon; Carbon nanotubes,OXYGEN-REDUCTION REACTION; WALLED CARBON NANOTUBES; CATHODE CATALYSTS; DOPED CARBON; IRON; ELECTROCATALYSTS; NITROGEN; STABILITY; GRAPHENE; GROWTH,PEM fuel cell;Non-precious metal catalyst;Cyanamide;Ordered mesoporous carbon;Carbon nanotubes;OXYGEN-REDUCTION REACTION;WALLED CARBON NANOTUBES;CATHODE CATALYSTS;DOPED CARBON;IRON;ELECTROCATALYSTS;NITROGEN;STABILITY;GRAPHENE;GROWTH,anders.palmqvist@chalmers.se,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:000403457000011,2-s2.0-85018994258,Sweden,chalmers.se,Chalmers Univ Technol,"Chalmers Univ Technol, Sweden","Dombrovskis, Johanna K.; Palmqvist, Anders E. C."
"You, Y., Wu, C.H., Yao, Y.F., Liu, J.G., Wang, Z.W., Huang, L., Xie, J., Su, X.G., Zou, Z.G.",One-pot synthesis of triazine-framework derived catalysts with high performance for polymer electrolyte membrane fuel cells,2016,RSC ADVANCES,6,26,,21617,21623,7,3,10.1039/c5ra25864b,,"[You, Yong; Wu, Chenghao; Yao, Yingfang; Liu, Jianguo; Wang, Zhongwei; Huang, Lin; Xie, Jin; Su, Xiaogang; Zou, Zhigang] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Natl Lab Solid State Microstruct, Dept Mat Sci & Engn, Nanjing 210093, Jiangsu, Peoples R China; [You, Yong; Wu, Chenghao; Yao, Yingfang; Liu, Jianguo; Wang, Zhongwei; Huang, Lin; Xie, Jin; Su, Xiaogang; Zou, Zhigang] Nanjing Univ, Ecomat & Renewable Energy Res Ctr, Jiangsu Key Lab Nano Technol, Nanjing 210093, Jiangsu, Peoples R China; [Liu, Jianguo; Zou, Zhigang] Nanjing Univ, Kunshan Sunlaite New Energy Co Ltd, Kunshan Innovat Inst, Nanjing 215347, Jiangsu, Peoples R China",,"The prohibitive cost and scarcity of the precious metals used for oxygen reduction reaction (ORR) catalysts limit the large-scale commercialization of proton exchange membrane fuel cells (PEMFCs). Great efforts have been made to improve the ORR activity of non-precious metal catalysts. Herein, we describe a one-pot synthesis process of preparing triazine-polymer-Fe-C catalysts using polyimide (PI), ferric chloride and melamine as the precursors with a pronounced electrocatalytic activity towards ORR in acid media. The ORR activity of catalysts and the performance of single cells strongly depend on the properties of the carbon supports, which affect the surface areas and microporosities of the final catalysts. The optimized PI-Fe-C catalyst exhibits an excellent performance (onset potential of 0.92 V and the half-wave potential 0.78 V) towards ORR activity in acid medium. A maximum power density of 310 mW cm(-2) is obtained with a loading of 2 mg cm(-2) in a single cell.",,OXYGEN-REDUCTION REACTION; POROUS GRAPHENE; CARBON; ELECTROCATALYSTS; NITROGEN; IRON; ACTIVATION; ULTRATHIN,OXYGEN-REDUCTION REACTION;POROUS GRAPHENE;CARBON;ELECTROCATALYSTS;NITROGEN;IRON;ACTIVATION;ULTRATHIN,jianguoliu@nju.edu.cn; zgzou@nju.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,,,,,English,RSC ADV,Article,WoS,Chemistry,WOS:000371535200039,2-s2.0-84959364624,China,nju.edu.cn,Nanjing Univ,"Nanjing Univ, China","You, Yong; Wu, Chenghao; Yao, Yingfang; Liu, Jianguo; Wang, Zhongwei; Huang, Lin; Xie, Jin; Su, Xiaogang; Zou, Zhigang"
"Yin, J., Qiu, Y.J., Yu, J.",Onion-like graphitic nanoshell structured Fe-N/C nanofibers derived from electrospinning for oxygen reduction reaction in acid media,2013,ELECTROCHEMISTRY COMMUNICATIONS,30,,,1,4,4,55,10.1016/j.elecom.2013.01.022,,"[Yin, Jing; Qiu, Yejun; Yu, Jie] Harbin Inst Technol, Shenzhen Engn Lab Flexible Transparent Conduct Fi, Dept Mat Sci & Engn, Shenzhen Grad Sch, Shenzhen, Peoples R China",,"Hollow onion-like graphitic nanoshell structured Fe-N/C nanofiber (Fe-N/CNF) catalyst with porous morphology was prepared by heat treating as-spun polyacrylonitrile/ferrous oxalate composite nanofibers in ammonia atmosphere for the first time. These porous electrocatalyst showed both excellent catalytic activity for oxygen reduction reaction (ORR) and much better stability than commercial Pt/C catalyst in acid solution. The Fe-N/CNF catalysts developed here could be easily fabricated on a large scale and show high potential in proton exchange membrane fuel cells (PEMFCs). (C) 2013 Elsevier B.V. All rights reserved,",Fe-N/C nanofibers; Electrocatalysts; Onion-like carbon; Electrospinning; Oxygen reduction reaction,HIGH ELECTROCATALYTIC ACTIVITY; METAL CATALYSTS; CARBON; GRAPHENE; ARRAYS,Fe-N/C nanofibers;Electrocatalysts;Onion-like carbon;Electrospinning;Oxygen reduction reaction;HIGH ELECTROCATALYTIC ACTIVITY;METAL CATALYSTS;CARBON;GRAPHENE;ARRAYS,yejunqiu@yahoo.com.cn; jyu@hitsz.edu.cn,,"360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA",,,,ELSEVIER SCIENCE INC,1388-2481,,,,English,ELECTROCHEM COMMUN,Article,WoS,Electrochemistry,WOS:000317453100001,2-s2.0-84874038368,China,yahoo.com.cn,Harbin Inst Technol,"Harbin Inst Technol, China","Yin, Jing; Qiu, Yejun; Yu, Jie"
"Zhuang, L.",On the development of alkaline membrane fuel cells,2010,ACS National Meeting Book of Abstracts,,,,,,,0,,https://www.scopus.com/inward/record.uri?eid=2-s2.0-79951525781&partnerID=40&md5=7957c1a290bd662c1c31ba4009debd9c,"Department of Chemistry, Wuhan University, Wuhan, Hubei, China","Zhuang, Lin, Department of Chemistry, Wuhan University, Wuhan, Hubei, China","Polymer electrolyte membrane fuel cells (PEMFC) have been well recognized as an important power source in the future energy system based on hydrogen. The current PEMFC technology features the employment of acidic polymer electrolytes which, albeit superior to electrolyte solutions, have intrinsically limited the catalysts to only noble metals, an issue fundamentally preventing PEMFC from widespread deployment. An effective solution to this problem is to develop fuel cells based on alkaline polymer electrolytes (APEFC), which not only enable the use of non-precious metal catalysts but also avoid the carbonate-precipitate issue that has been troubling the traditional alkaline fuel cells (AFC). In this talk, the principle, challenges, and recent developments of APEFC in my group are reviewed. Emphases are put on the difficulty and strategy for the development of key materials, including high-performance alkaline polyelectrolytes and stable non-precious metal catalysts.",,,,,,,239th ACS National Meeting and Exposition,,,,00657727,084127438X; 9780841274082; 0841269556; 0841274088; 9780841269941; 9780841224414; 9780841274266; 9780841269859; 0841274266; 9780841274389,ACSRA,,English,ACS Natl. Meet. Book Abstr.,Conference paper,Scopus,,2-s2.0-79951525781,,China,No email,,,"Zhuang, L."
"Wagner, S., Martinaiou, I., Shahraei, A., Weidler, N., Kramm, U.I.",On the effect of sulfite ions on the structural composition and ORR activity of Fe-N-C catalysts,2018,HYPERFINE INTERACTIONS,239,,10,,,12,5,10.1007/s10751-017-1485-8,,"[Wagner, S.; Martinaiou, I.; Weidler, N.; Kramm, U. I.] Tech Univ Darmstadt, Dept Mat & Earth Sci, Alarich Weiss Str 2, D-64287 Darmstadt, Germany; [Shahraei, A.; Kramm, U. I.] Tech Univ Darmstadt, Grad Sch Excellence Energy Sci & Engn, Otto Berndt Str 3, D-64287 Darmstadt, Germany; [Wagner, S.; Martinaiou, I.; Shahraei, A.; Kramm, U. I.] Tech Univ Darmstadt, Dept Mat & Earth Sci, Otto Berndt Str 3, D-64287 Darmstadt, Germany",,"Fe-N-C catalysts are the most promising group of non-precious metal catalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFC). This study focusses on two different porphyrin-based Fe-N-C catalysts and a Fe-N-C catalyst prepared from alternative precursors under S-addition. Catalysts are subjected to a wet-chemical poisoning treatment by sulfite ions . A mechanism for the deactivation process of the active sites is proposed. ORR activity is evaluated for the original catalysts (OC) and for the poisoned catalysts in 0.1 M H2SO4. In addition, the structural composition of the catalysts is identified by Mobauer spectroscopy. Our results show that the sulfite ions bound irreversible to the catalysts and the catalysts lose significant fractions of their ORR activity while in Mobauer spectroscopy a new doublet appears. Based on the results, possible models for the binding of the ambident sulfite ion to the FeN4 centers are discussed.",Fe-N-C catalyst; Mossbauer spectroscopy; PEMFC; oxygen reduction reaction,OXYGEN-REDUCTION REACTION; FUEL-CELLS; FE/N/C CATALYSTS; SITES; IRON; ELECTROCATALYSTS; MOSSBAUER; DENSITY; CARBON; SPECTROSCOPY,Fe-N-C catalyst;Mossbauer spectroscopy;PEMFC;oxygen reduction reaction;OXYGEN-REDUCTION REACTION;FUEL-CELLS;FE/N/C CATALYSTS;SITES;IRON;ELECTROCATALYSTS;MOSSBAUER;DENSITY;CARBON;SPECTROSCOPY,kramm@ese.tu-darmstadt.de,,"VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS",International Conference on the Applications of the Mossbauer Effect (ICAME),"Saint Petersburg, RUSSIA","SEP 03-08, 2017",SPRINGER,0304-3843,,,,English,HYPERFINE INTERACT,Proceedings Paper,WoS,Physics,WOS:000422825500001,2-s2.0-85044352115,Germany,ese.tu-darmstadt.de,Tech Univ Darmstadt,"Tech Univ Darmstadt, Germany","Wagner, S.; Martinaiou, I.; Shahraei, A.; Weidler, N.; Kramm, U. I."
"Kumar, K., Dubau, L., Mermoux, M., Li, J.K., Zitolo, A., Nelayah, J., Jaouen, F., Maillard, F.",On the Influence of Oxygen on the Degradation of Fe-N-C Catalysts,2020,ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,59,8,,3235,3243,9,239,10.1002/anie.201912451,,"[Kumar, Kavita; Dubau, Laetitia; Mermoux, Michel; Maillard, Frederic] Univ Grenoble Alpes, Univ Savoie Mt Blanc, CNRS, Grenoble INP,LEPMI, F-38000 Grenoble, France; [Li, Jingkun; Jaouen, Frederic] Univ Montpellier, Inst Charles Gerhardt Montpellier, CNRS, ENSCM,UMR 5253, 2 Pl Eugene Bataillon, F-34095 Montpellier, France; [Zitolo, Andrea] Synchrotron SOLEIL, BP 48 St Aubin, F-91192 Gif Sur Yvette, France; [Nelayah, Jaysen] Univ Paris, CNRS, Lab Mat & Phenomenes Quant, F-75013 Paris, France",,"Fe-N-C catalysts containing atomic FeNx sites are promising candidates as precious-metal-free catalysts for oxygen reduction reaction (ORR) in proton exchange membrane fuel cells. The durability of Fe-N-C catalysts in fuel cells has been extensively studied using accelerated stress tests (AST). Herein we reveal stronger degradation of the Fe-N-C structure and four-times higher ORR activity loss when performing load cycling AST in O-2- vs. Ar-saturated pH 1 electrolyte. Raman spectroscopy results show carbon corrosion after AST in O-2, even when cycling at low potentials, while no corrosion occurred after any load cycling AST in Ar. The load-cycling AST in O-2 leads to loss of a significant fraction of FeNx sites, as shown by energy dispersive X-ray spectroscopy analyses, and to the formation of Fe oxides. The results support that the unexpected carbon corrosion occurring at such low potential in the presence of O-2 is due to reactive oxygen species produced between H2O2 and Fe sites via Fenton reactions.",carbon corrosion; Fe-N-C Catalysts; oxygen reduction reaction; polymer electrolyte membrane fuel cells; reactive oxygen species (ROS),REDUCTION REACTION; ACTIVE-SITES; FE/N/C CATALYSTS; METAL-CATALYSTS; STABILITY; IRON; PEROXIDE,carbon corrosion;Fe-N-C Catalysts;oxygen reduction reaction;polymer electrolyte membrane fuel cells;reactive oxygen species (ROS);REDUCTION REACTION;ACTIVE-SITES;FE/N/C CATALYSTS;METAL-CATALYSTS;STABILITY;IRON;PEROXIDE,frederic.jaouen@umontpellier.fr; frederic.maillard@lepmi.grenoble-inp.fr,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1433-7851,,,31799800,English,ANGEW CHEM INT EDIT,Article,WoS,Chemistry,WOS:000505809000002,2-s2.0-85077974727,France,umontpellier.fr,Univ Grenoble Alpes;Univ Montpellier;Synchrotron SOLEIL;Univ Paris,"Univ Grenoble Alpes, France;Univ Montpellier, France;Synchrotron SOLEIL, France;Univ Paris, France","Kumar, Kavita; Dubau, Laetitia; Mermoux, Michel; Li, Jingkun; Zitolo, Andrea; Nelayah, Jaysen; Jaouen, Frederic; Maillard, Frederic"
"Menga, D., Li, Y.S., Damjanovic, A.M., Proux, O., Wagner, F.E., Fellinger, T.P., Gasteiger, H.A., Piana, M.",On the Stability of an Atomically-Dispersed Fe-N-C ORR Catalyst: An In Situ XAS Study in a PEMFC,2024,CHEMELECTROCHEM,11,18,,,,16,4,10.1002/celc.202400228,,"[Menga, Davide; Li, Yan-Sheng; Damjanovic, Ana Marija; Gasteiger, Hubert A.; Piana, Michele] Tech Univ Munich, Chair Tech Electrochem, TUM Sch Nat Sci, Dept Chem, D-85748 Garching, Germany; [Menga, Davide; Li, Yan-Sheng; Damjanovic, Ana Marija; Gasteiger, Hubert A.; Piana, Michele] Tech Univ Munich, Chair Tech Electrochem, Catalysis Res Ctr, D-85748 Garching, Germany; [Proux, Olivier] Univ Grenoble Alpes, Observ Sci Univers Grenoble OSUG, UAR 832, CNRS, F-38041 Grenoble, France; [Wagner, Friedrich E.] Tech Univ Munich, TUM Sch Nat Sci, Dept Phys, D-85748 Garching, Germany; [Fellinger, Tim-Patrick] Bundesanstalt Materialforsch & Prufung BAM, D-12203 Berlin, Germany",,"The stability of Fe-N-C oxygen reduction reaction (ORR) electrocatalysts has been considered a primary challenge for their practical application in proton exchange membrane fuel cells (PEMFCs). While several studies have attempted to reveal the possible degradation mechanism of Fe-N-C ORR catalysts, there are few research results reporting on their stability as well as the possible Fe species formed under different voltages in real PEMFC operation. In this work, we employ in-situ X-ray absorption near-edge structure (XANES) to monitor the active-site degradation byproducts of an atomically dispersed Fe-N-C ORR catalyst under a H-2/O-2-operating PEMFC at 90 % relative humidity and 80 degrees C. For this, stability tests were carried out at two constant cell voltages, namely 0.4 and at 0.8 V. Even though the ORR activity of the Fe-N-C catalyst decreased significantly and was almost identical at the end of the tests for the two voltages employed, the analysis of the XANES recorded under H-2/N-2 configuration at 0.6 and 0.9 V within the stability test suggests that two different degradation mechanisms occur. They are demetalation of iron cations followed by their precipitation into Fe oxides upon operation at 0.8 V, versus a chemical carbon oxidation close to the active sites, likely triggered by reactive oxygen species (ROS) originated from the H2O2 formation, during the operation at 0.4 V.",PEM fuel cell; Fe-N-C ORR catalyst; In situ XAS; Degradation; Stability,OXYGEN REDUCTION CATALYSTS; METAL-FREE CATALYSTS; FUEL-CELLS; ACTIVE-SITES; IRON; MOSSBAUER; DEGRADATION; PERFORMANCE; TRANSPORT; ZRO2,PEM fuel cell;Fe-N-C ORR catalyst;In situ XAS;Degradation;Stability;OXYGEN REDUCTION CATALYSTS;METAL-FREE CATALYSTS;FUEL-CELLS;ACTIVE-SITES;IRON;MOSSBAUER;PERFORMANCE;TRANSPORT;ZRO2,menga@mit.edu; yan-sheng.li@tum.de,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,2196-0216,,,,English,CHEMELECTROCHEM,Article,WoS,Electrochemistry,WOS:001298261300001,,Germany;France,mit.edu,Tech Univ Munich;Univ Grenoble Alpes;Bundesanstalt Materialforsch & Prufung BAM,"Tech Univ Munich, Germany;Univ Grenoble Alpes, France;Bundesanstalt Materialforsch & Prufung BAM, Germany","Menga, Davide; Li, Yan-Sheng; Damjanovic, Ana Marija; Proux, Olivier; Wagner, Friedrich E.; Fellinger, Tim-Patrick; Gasteiger, Hubert A.; Piana, Michele"
"Kramm, U.I., Zana, A., Vosch, T., Fiechter, S., Arenz, M., Schmeisser, D.",On the structural composition and stability of Fe-N-C catalysts prepared by an intermediate acid leaching,2016,JOURNAL OF SOLID STATE ELECTROCHEMISTRY,20,4,,969,981,13,48,10.1007/s10008-015-3060-z,,"[Kramm, Ulrike I.; Schmeisser, Dieter] BTU Cottbus Senftenberg, Dept Phys, Konrad Wachsmann Allee 17, D-03046 Cottbus, Germany; [Zana, Alessandro; Vosch, Tom; Arenz, Matthias] Univ Copenhagen, Dept Chem, Nanosci Ctr, Univ Parken 5, DK-2100 Copenhagen, Denmark; [Arenz, Matthias] Helmholtz Ctr Berlin, Inst Solar Fuels, Lise Meitner Campus,Hahn Meitner Pl 1, D-14109 Berlin, Germany; [Kramm, Ulrike I.] Tech Univ Darmstadt, Grad Sch Excellence Energy Sci & Engn, Dept Chem, Jovanka Bontschits Str 2, D-64287 Darmstadt, Germany; [Kramm, Ulrike I.] Tech Univ Darmstadt, Dept Mat, Jovanka Bontschits Str 2, D-64287 Darmstadt, Germany; [Kramm, Ulrike I.] Tech Univ Darmstadt, Dept Earth Sci, Jovanka Bontschits Str 2, D-64287 Darmstadt, Germany",,"The development of highly active and stable non-noble metal catalysts (NNMC) for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEM-FC) becomes of importance in order to enable cost reduction. In this work, we discuss the structural composition as derived from Fe-57 Mossbauer spectroscopy and X-ray diffraction, catalytic performance determined by a rotating (ring) disk electrode (RRDE) technique and stability evaluation of our Fe-N-C catalysts prepared by an intermediate acid leaching (IAL), The advantage of this IAL is given by a high density of active sites within the catalyst, as even without sulphur addition, an iron carbide formation and related disintegration of active sites are inhibited. In addition, our accelerated stress tests illustrate better stability of the sulphur-free IAL catalyst in comparison to the sulphur-added one.",Non-noble metal catalysts (NNMC); Fe-N-C; ORR; PEM-FC Accelerated stress tests (ASTs); Mossbauer spectroscopy,OXYGEN REDUCTION REACTION; METAL-ORGANIC FRAMEWORK; PEM FUEL-CELL; FE/N/C-CATALYSTS; CATHODE CATALYST; O-2 REDUCTION; ACTIVE-SITES; IL-TEM; ELECTROCATALYSTS; IRON,Non-noble metal catalysts (NNMC);Fe-N-C;ORR;PEM-FC Accelerated stress tests (ASTs);Mossbauer spectroscopy;OXYGEN REDUCTION REACTION;METAL-ORGANIC FRAMEWORK;PEM FUEL-CELL;FE/N/C-CATALYSTS;CATHODE CATALYST;O-2 REDUCTION;ACTIVE-SITES;IL-TEM;ELECTROCATALYSTS;IRON,kramm@ese.tu-darmstadt.de,,"233 SPRING ST, NEW YORK, NY 10013 USA",,,,SPRINGER,1432-8488,,,,English,J SOLID STATE ELECTR,Article,WoS,Electrochemistry,WOS:000374841300013,2-s2.0-84945568915,Germany;Denmark,ese.tu-darmstadt.de,BTU Cottbus Senftenberg;Univ Copenhagen;Helmholtz Ctr Berlin;Tech Univ Darmstadt,"BTU Cottbus Senftenberg, Germany;Univ Copenhagen, Denmark;Helmholtz Ctr Berlin, Germany;Tech Univ Darmstadt, Germany","Kramm, Ulrike I.; Zana, Alessandro; Vosch, Tom; Fiechter, Sebastian; Arenz, Matthias; Schmeisser, Dieter"
"Liu, S.Y., Meyer, Q., Jia, C., Wang, S.H., Rong, C.L., Nie, Y., Zhao, C.",Operando deconvolution of the degradation mechanisms of iron-nitrogen-carbon catalysts in proton exchange membrane fuel cells,2023,ENERGY & ENVIRONMENTAL SCIENCE,16,9,,3792,3802,11,62,10.1039/d3ee01166f,,"[Liu, Shiyang; Meyer, Quentin; Jia, Chen; Wang, Shuhao; Rong, Chengli; Nie, Yan; Zhao, Chuan] Univ New South Wales, Sch Chem, Sydney, NSW 2052, Australia",,"Developing platinum-free catalysts for proton exchange membrane fuel cells (PEMFCs) is crucial to the hydrogen economy. While iron-nitrogen-carbon (Fe-N-C) catalysts are currently the most promising non-Pt alternative for the ORR, their poor stability in PEMFCs are challenging to understand due to the multitude of degradation mechanisms occurring simultaneously. Herein, we deconvolute these mechanisms in PEMFC over 60 hours under high load (1 A cm(-2)) using advanced electrochemical methods such as the distribution of relaxation times. This allows us to identify when iron demetallation and carbon corrosion occur and unveil an intricate degradation pathway through the operando deterioration of the triple-phase boundary. Firstly, up to 75% of the Fe-N-C active sites become inactive through iron demetallation which initially drives the voltage losses (<10 hours). Then, a five-fold increase in carbon corroded species and four-fold reduction in proton transport kinetics in the catalyst layer lengthen the gas, ionic and electronic pathways to the catalytic sites, reducing the oxygen reduction reaction (ORR) rate by three-fold and becoming the predominant degradation mechanism. These insights are captured via a combination of cyclic voltammetry and the distribution of relaxation times. Altogether, these provide unprecedented insights into this degradation mechanism while proposing operando standards to characterize unstable electrocatalysts.",,FE-N-C; OXYGEN REDUCTION REACTION; ACTIVE-SITES; ELECTROCATALYST; CORROSION,FE-N-C;OXYGEN REDUCTION REACTION;ACTIVE-SITES;ELECTROCATALYST;CORROSION,chuan.zhao@unsw.edu.au,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,1754-5692,,,,English,ENERG ENVIRON SCI,Article,WoS,Chemistry; Energy & Fuels; Engineering; Environmental Sciences & Ecology,WOS:001034826400001,2-s2.0-85167336379,Australia,unsw.edu.au,Univ New South Wales,"Univ New South Wales, Australia","Liu, Shiyang; Meyer, Quentin; Jia, Chen; Wang, Shuhao; Rong, Chengli; Nie, Yan; Zhao, Chuan"
"Meyer, Q., Liu, S.Y., Li, Y.B., Zhao, C.A.",Operando detection of oxygen reduction reaction kinetics of Fe-N-C catalysts in proton exchange membrane fuel cells,2022,JOURNAL OF POWER SOURCES,533,,231058,,,9,42,10.1016/j.jpowsour.2022.231058,,"[Meyer, Quentin; Liu, Shiyang; Li, Yibing; Zhao, Chuan] Univ New South Wales, Sch Chem, Sydney, NSW 2052, Australia; [Li, Yibing] Southwest Jiaotong Univ, Inst Smart City & Intelligent Transportat, Chengdu 610097, Peoples R China",,"Low-cost, high-performances and durable hydrogen fuel cells are crucial for the success of the hydrogen economy. While Fe-N-C structures containing Fe-Nx active sites are amongst the most promising platinum (Pt)-group metal (PGM)-free catalysts for the oxygen reduction reaction, their highest performances-to-date are still inferior to commercial Pt in real proton exchange membrane fuel cells. Herein, we shed light on this performance gap by using the distribution of relaxation times to quantify the proton transport and oxygen reduction reaction kinetics of a high-performance Fe-N-C catalyst (1.08 W cm(-2)) and a commercial Pt catalyst (1.7 W cm(-2)) in hydrogen fuel cell. This study unveils that the Fe-N-C catalyst has slower proton transport and oxygen reduction reaction kinetics than Pt as the Fe-N-C nanoporous carbon matrix limits active site accessibility. Furthermore, while increasing the Fe-N-C catalytic mass loading (from 1 to 3 mg(Fe-N-C) cm(-2)) enhances the power density in hydrogen fuel cells, it also slows down proton transport and oxygen reduction reaction kinetics by lengthening the gas, electron, and proton pathways to the active sites. This finding will drive the development of PGM-free catalysts for hydrogen fuel cells and of single-atom catalysts for electrochemical applications.",Iron-nitrogen-carbon; Proton exchange membrane fuel cells; Oxygen reduction reaction; Proton transport; Distribution of relaxation times,TURNOVER FREQUENCY; RELAXATION-TIMES; ACTIVE-SITES; ELECTROCATALYST; PERFORMANCE; IMPEDANCE; DENSITY; DECONVOLUTION; ASSEMBLIES,Iron-nitrogen-carbon;Proton exchange membrane fuel cells;Oxygen reduction reaction;Proton transport;Distribution of relaxation times;TURNOVER FREQUENCY;RELAXATION-TIMES;ACTIVE-SITES;ELECTROCATALYST;PERFORMANCE;IMPEDANCE;DENSITY;DECONVOLUTION;ASSEMBLIES,chuan.zhao@unsw.edu.au,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:000793521900004,2-s2.0-85127751208,Australia;China,unsw.edu.au,Univ New South Wales;Southwest Jiaotong Univ,"Univ New South Wales, Australia;Southwest Jiaotong Univ, China","Meyer, Quentin; Liu, Shiyang; Li, Yibing; Zhao, Chuan"
"Pedersen, A., Kumar, K., Ku, Y.P., Martin, V., Dubau, L., Santos, K.T., Barrio, J., Savel'eva, V.A., Glatzel, P., Paidi, V.K., Li, X., Hutzler, A., Titirici, M.M., Bonnefont, A., Cherevko, S., Stephens, I.E.L., Maillard, F.",Operando Fe dissolution in Fe-N-C electrocatalysts during acidic oxygen reduction: impact of local pH change,2024,Energy and Environmental Science,17,17,,6323,6337,,26,10.1039/d4ee01995d,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85200493014&doi=10.1039%2Fd4ee01995d&partnerID=40&md5=8c6c4e27d128ed299d1f3626fb274edc,"Department of Materials, Imperial College London, London, United Kingdom; Department of Chemical Engineering, Imperial College London, London, United Kingdom; Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Forschungszentrum Jülich GmbH, Julich, Germany; Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; European Synchrotron Radiation Facility, Grenoble, Auvergne-Rhone-Alpes, France; CNRS Centre National de la Recherche Scientifique, Paris, Ile-de-France, France","Pedersen, Angus, Department of Materials, Imperial College London, London, United Kingdom, Department of Chemical Engineering, Imperial College London, London, United Kingdom, Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Kumar, Kavita, Forschungszentrum Jülich GmbH, Julich, Germany; Ku, Yuping, Forschungszentrum Jülich GmbH, Julich, Germany, Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; Martin, Vincent, Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Dubau, Laetitia, Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Santos, Keyla Teixeira, Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Barrio, Jesús, Department of Materials, Imperial College London, London, United Kingdom, Department of Chemical Engineering, Imperial College London, London, United Kingdom; Savel’eva, Viktoriia A., European Synchrotron Radiation Facility, Grenoble, Auvergne-Rhone-Alpes, France; Glatzel, Pieter, European Synchrotron Radiation Facility, Grenoble, Auvergne-Rhone-Alpes, France; Paidi, Vinod K., European Synchrotron Radiation Facility, Grenoble, Auvergne-Rhone-Alpes, France; Li, Xiaoyan, CNRS Centre National de la Recherche Scientifique, Paris, Ile-de-France, France; Hutzler, Andreas, Forschungszentrum Jülich GmbH, Julich, Germany; Titirici, Maria Magdalena, Department of Chemical Engineering, Imperial College London, London, United Kingdom; Bonnefont, Antoine, Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Cherevko, Serhiy, Forschungszentrum Jülich GmbH, Julich, Germany; Stephens, Ifan E.L., Department of Materials, Imperial College London, London, United Kingdom; Maillard, Frédéric M., Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France","Atomic Fe in N-doped C (Fe-N-C) catalysts provide the most promising non-precious metal O<inf>2</inf> reduction activity at the cathodes of proton exchange membrane fuel cells. However, one of the biggest remaining challenges to address towards their implementation in fuel cells is their limited durability. Fe demetallation has been suggested as the primary initial degradation mechanism. However, the fate of Fe under different operating conditions varies. Here, we monitor operando Fe dissolution of a highly porous and >50% FeN<inf>x</inf> electrochemical utilization Fe-N-C catalyst in 0.1 M HClO<inf>4</inf>, under O<inf>2</inf> and Ar at different temperatures, in both flow cell and gas diffusion electrode (GDE) half-cell coupled to inductively coupled plasma mass spectrometry (ICP-MS). By combining these results with pre- and post-mortem analyses, we demonstrate that in the absence of oxygen, Fe cations diffuse away within the liquid phase. Conversely, at −15 mA cm−2<inf>geo</inf> and more negative O<inf>2</inf> reduction currents, the Fe cations reprecipitate as Fe-oxides. We support our conclusions with a microkinetic model, revealing that the local pH in the catalyst layer predominantly accounts for the observed trend. Even at a moderate O<inf>2</inf> reduction current density of −15 mA cm−2<inf>geo</inf> at 25 °C, a significant H+ consumption and therefore pH increase (pH = 8-9) within the bulk Fe-N-C layer facilitate precipitation of Fe cations. This work provides a unified view on the Fe dissolution degradation mechanism for a model Fe-N-C in both high-throughput flow cell and practical operating GDE conditions, underscoring the crucial role of local pH in regulating the stability of the active sites. © 2024 The Royal Society of Chemistry.",,Degradation; Diffusion in gases; Dissolution; Doping (additives); Electrodes; Electrolytic reduction; Inductively coupled plasma mass spectrometry; Iron oxides; Oxygen; Positive ions; Proton exchange membrane fuel cells (PEMFC); Fe cations; Fe dissolution; Flow cells; Gas diffusion electrodes; Local pH; N-doped; Operando; Oxygen Reduction; Reduction current; ]+ catalyst; Electrocatalysts; catalyst; electrochemical method; electrode; fuel cell; inductively coupled plasma method; iron; oxygen; pH; reduction,Degradation;Diffusion in gases;Dissolution;Doping (additives);Electrodes;Electrolytic reduction;Inductively coupled plasma mass spectrometry;Iron oxides;Oxygen;Positive ions;Proton exchange membrane fuel cells (PEMFC);Fe cations;Fe dissolution;Flow cells;Gas diffusion electrodes;Local pH;N-doped;Operando;Oxygen Reduction;Reduction current;]+ catalyst;Electrocatalysts;catalyst;electrochemical method;electrode;fuel cell;inductively coupled plasma method;iron;pH;reduction,"I.E.L. Stephens; Imperial College London, Department of Materials, Royal School of Mines, London, SW7 2AZ, United Kingdom; email: i.stephens@imperial.ac.uk; F. Maillard; Univ. Grenoble Alpes, Univ. Savoie-Mont-Blanc, CNRS, Grenoble-INP, LEPMI, Grenoble, 38000, France; email: frederic.maillard@grenoble-inp.fr",,,,,,Royal Society of Chemistry,17545692,,,,English,Energy Environ. Sci.,Article,Scopus,,2-s2.0-85200493014,,United Kingdom;France;Germany,imperial.ac.uk,,,"Pedersen, A.; Kumar, K.; Ku, Y.-P.; Martin, V.; Dubau, L.; Santos, K.T.; Barrio, J.; Savel'eva, V.A.; Glatzel, P.; Paidi, V.K.; Li, X.; Hutzler, A.; Titirici, M.-M.; Bonnefont, A.; Cherevko, S.; Stephens, I.E.L.; Maillard, F."
"Pedersen, A., Snitkoff-Sol, R.Z., Presman, Y., Barrio, J., Cai, R.S., Suter, T., Yang, G.M.M., Haigh, S.J., Brett, D., Jervis, R., Titirici, M.M., Stephens, I.E.L., Elbaz, L.",Optimisation and effect of ionomer loading on porous Fe-N-C-based proton exchange membrane fuel cells probed by emerging electrochemical methods,2024,JOURNAL OF POWER SOURCES,609,,234683,,,12,16,10.1016/j.jpowsour.2024.234683,,"[Pedersen, Angus; Yang, Guangmeimei; Stephens, Ifan E. L.] Imperial Coll London, Royal Sch Mines, Dept Mat, London SW7 2AZ, England; [Pedersen, Angus; Barrio, Jesus; Titirici, Maria-Magdalena] Imperial Coll London, Dept Chem Engn, London SW7 2AZ, England; [Pedersen, Angus; Suter, Theo; Brett, Dan; Jervis, Rhodri] UCL, Dept Chem Engn, Electrochem Innovat Lab, London WC1E 7JE, England; [Pedersen, Angus; Snitkoff-Sol, Rifael Z.; Presman, Yan; Elbaz, Lior] Bar Ilan Univ, Inst Nanotechnol & Adv Mat, Ramat Gan, Israel; [Pedersen, Angus; Snitkoff-Sol, Rifael Z.; Presman, Yan; Elbaz, Lior] Bar Ilan Univ, Dept Chem, Ramat Gan, Israel; [Cai, Rongsheng; Haigh, Sarah J.] Univ Manchester, Dept Mat, Manchester M13 9PL, England; [Titirici, Maria-Magdalena] Tohoku Univ, Adv Inst Mat Res WPI AIMR, 2-1-1 Katahira,Aobaku, Sendai, Miyagi 9808577, Japan",,"The next generation of proton exchange membrane fuel cells (PEMFCs) require a substantial reduction or elimination of Pt-based electrocatalyst from the cathode, where O-2 reduction takes place. The most promising alternative to Pt is atomic Fe embedded in N-doped C (Fe-N-C). Successful incorporation of Fe-N-C in PEMFCs relies on a thorough understanding of the catalyst layer properties, both ex situ and in situ, with tailored electrode interface engineering. To help resolve this conundrum, we provide a quantitative protocol on the optimisation of I/C for Fe-N-Cs. It is demonstrated that a high pore volume (3.33 cm(3) g(FeNC)(-1)) Fe-N-C catalyst requires a sufficiently high ionomer to catalyst mass ratio (I/C, 2.8 <= I/C <= 4.2) for optimum PEMFC activity under H-2/O-2. Emerging electrochemical techniques (distribution of relaxation times and Fourier transformed alternating current voltammetry) were used to deconvolute for the first time the trade-off between proton and electron resistance and accessible FeNx x active site density with increasing ionomer loading. These findings highlight the significant impact of tuning the I/C ratio based on the catalyst layer properties and feature the power of evolving electrochemical tools for optimising performance in PEMFCs and other electrochemical devices.",Single atom; Ionomer; Electrocatalyst; Fuel cell; Fourier transformed alternating current; voltammetry,OXYGEN REDUCTION CATALYSTS; CARBON SUPPORT; ELECTRICAL-CONDUCTIVITY; ELECTRONIC CONDUCTIVITY; IMPEDANCE SPECTROSCOPY; O-2 ELECTROREDUCTION; CATHODE PERFORMANCE; SURFACE-CHEMISTRY; ACTIVE-SITES; IN-SITU,Single atom;Ionomer;Electrocatalyst;Fuel cell;Fourier transformed alternating current;voltammetry;OXYGEN REDUCTION CATALYSTS;CARBON SUPPORT;ELECTRICAL-CONDUCTIVITY;ELECTRONIC CONDUCTIVITY;IMPEDANCE SPECTROSCOPY;O-2 ELECTROREDUCTION;CATHODE PERFORMANCE;SURFACE-CHEMISTRY;ACTIVE-SITES;IN-SITU,a.pedersen19@imperial.ac.uk; lior.elbaz@biu.ac.il,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:001298350400001,2-s2.0-85192935164,United Kingdom;Israel;Japan,imperial.ac.uk,Imperial Coll London;UCL;Bar Ilan Univ;Univ Manchester;Tohoku Univ,"Imperial Coll London, United Kingdom;UCL, United Kingdom;Bar Ilan Univ, Israel;Univ Manchester, United Kingdom;Tohoku Univ, Japan","Pedersen, Angus; Snitkoff-Sol, Rifael Z.; Presman, Yan; Barrio, Jesus; Cai, Rongsheng; Suter, Theo; Yang, Guangmeimei; Haigh, Sarah J.; Brett, Dan; Jervis, Rhodri; Titirici, Maria-Magdalena; Stephens, Ifan E. L.; Elbaz, Lior"
"Park, J.C., Park, S.H., Chung, M.W., Choi, C.H., Kho, B.K., Woo, S.I.",Optimization of catalyst layer composition for PEMFC using graphene-based oxygen reduction reaction catalysts,2015,Journal of Power Sources,286,,,166,174,,22,10.1016/j.jpowsour.2015.03.137,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84926070535&doi=10.1016%2Fj.jpowsour.2015.03.137&partnerID=40&md5=a3369fab7c2aed347fee8b53f1453d12,"Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Graduate School of EEWS, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; R and D Center, GS Caltex Corporation, Seoul, South Korea","Park, Jongcheol, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea, R and D Center, GS Caltex Corporation, Seoul, South Korea; Park, Sung Hyeon, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Chung, Min-wook, Graduate School of EEWS, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Choi, Chang Hyuck, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Kho, Back-kyun, R and D Center, GS Caltex Corporation, Seoul, South Korea; Woo, Seongihl, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea, Graduate School of EEWS, Korea Advanced Institute of Science and Technology, Daejeon, South Korea","The focus in recent years is on developing high performance non-precious metal catalysts (NPMCs) to reduce the catalyst cost in fuel cells. However, little attention has been paid to improve the utilization of NPMCs. Thus, this study focuses on the optimization of electrode component, particularly the Nafion content. With the synthesized graphene based oxygen reduction reaction (ORR) catalyst, the catalyst inks were prepared at various Nafion contents with suitable amounts of catalysts sprayed on the gas diffusion media. Twenty different single cells were assembled and measured for polarization, resistance and electrochemical impedance. Electrodes of 66.7 and 50.0% Nafion contents showed the highest performance for hydrogen/oxygen and hydrogen/air operation, respectively. These results were explained using the electrochemical impedance spectra, where the highest performance electrode resulted with the lowest charge transfer resistance. Moreover, negligible change in performance was observed during the 80 h of stability test. The optimization compositions of NPMC-based MEAs were very different to Pt-based MEAs, indicating the importance of optimization studies for the practical use of NPMCs. © 2015 Elsevier B.V. All rights reserved.",Catalyst loading; Electrochemical impedance spectroscopy; Nafion content; Non-precious metal catalysts; Oxygen reduction reaction; Proton exchange membrane fuel cell,Catalysts; Charge transfer; Electrochemical electrodes; Electrochemical impedance spectroscopy; Electrolytic reduction; Graphene; Oxygen; Oxygen reduction reaction; Precious metals; Catalyst loadings; Charge transfer resistance; Electrochemical impedance; Electrochemical impedance spectra; Electrode components; Nafion contents; Non-precious metal catalysts; Optimization studies; Proton exchange membrane fuel cells (PEMFC),Catalyst loading;Electrochemical impedance spectroscopy;Nafion content;Non-precious metal catalysts;Oxygen reduction reaction;Proton exchange membrane fuel cell;Catalysts;Charge transfer;Electrochemical electrodes;Electrolytic reduction;Graphene;Oxygen;Precious metals;Catalyst loadings;Charge transfer resistance;Electrochemical impedance;Electrochemical impedance spectra;Electrode components;Nafion contents;Optimization studies;Proton exchange membrane fuel cells (PEMFC),"S.I. Woo; Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, South Korea; email: siwoo@kaist.ac.kr",,,,,,Elsevier B.V.,03787753,0444894810,JPSOD,,English,J Power Sources,Article,Scopus,,2-s2.0-84926070535,,South Korea,kaist.ac.kr,,,"Park, J.C.; Park, S.H.; Chung, M.W.; Choi, C.H.; Kho, B.K.; Woo, S.I."
"Tian, J., Morozan, A., Sougrati, M.T., Lefevre, M., Chenitz, R., Dodelet, J.P., Jones, D., Jaouen, F.",Optimized Synthesis of Fe/N/C Cathode Catalysts for PEM Fuel Cells: A Matter of Iron-Ligand Coordination Strength,2013,ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,52,27,,6867,6870,4,203,10.1002/anie.201303025,,"[Tian, Juan; Lefevre, Michel; Chenitz, Regis; Dodelet, Jean-Pol] Inst Natl Rech Sci Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada; [Morozan, Adina; Sougrati, Moulay Tahar; Jones, Deborah; Jaouen, Frederic] Univ Montpellier 2, Inst Charles Gerhardt Montpellier, F-34095 Montpellier, France",,,chelates; fuel cells; iron; UV; Vis spectroscopy; zeolites,OXYGEN REDUCTION REACTION; METAL-ORGANIC FRAMEWORKS; ELECTROCATALYSTS; COMPLEXES; STABILITY; IMIDAZOLE; ION,chelates;fuel cells;iron;UV;Vis spectroscopy;zeolites;OXYGEN REDUCTION REACTION;METAL-ORGANIC FRAMEWORKS;ELECTROCATALYSTS;COMPLEXES;STABILITY;IMIDAZOLE;ION,dodelet@emt.inrs.ca; frederic.jaouen@univ-montp2.fr,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1433-7851,,,23720422,English,ANGEW CHEM INT EDIT,Article,WoS,Chemistry,WOS:000320776900008,2-s2.0-84879369994,Canada;France,emt.inrs.ca,Inst Natl Rech Sci Energie Mat & Telecommun;Univ Montpellier 2,"Inst Natl Rech Sci Energie Mat & Telecommun, Canada;Univ Montpellier 2, France","Tian, Juan; Morozan, Adina; Sougrati, Moulay Tahar; Lefevre, Michel; Chenitz, Regis; Dodelet, Jean-Pol; Jones, Deborah; Jaouen, Frederic"
"Maniatis, I., Charalampopoulos, G., Paloukis, F., Daletou, M.K.",Optimizing Fe-N-C Electrocatalysts for PEMFCs: Influence of Constituents and Pyrolysis on Properties and Performance,2024,CATALYSTS,14,11,780,,,19,6,10.3390/catal14110780,,"[Maniatis, Ilias; Charalampopoulos, Georgios; Paloukis, Fotios; Daletou, Maria K.] Fdn Res & Technol Hellas, Inst Chem Engn Sci, FORTH ICEHT, Stadiou Str, Platani Rion 26504, Patras, Greece; [Maniatis, Ilias; Charalampopoulos, Georgios] Univ Patras, Chem Dept, Patras 26504, Greece",,"Proton exchange membrane fuel cells (PEMFCs) are promising alternative technologies with applications in stationary power systems, vehicles, and portable electronics due to their low temperature operation, fast start-up, and environmental advantages. However, the high cost of platinum-based catalysts, in particular for the oxygen reduction reaction (ORR) of the cathode side, prevents their widespread incorporation. Fe-N-C electrocatalysts have emerged as viable alternatives to platinum. In this study, different precursor components were investigated for the way that they affect the pyrolysis process, which is crucial for tailoring the final catalyst properties. In particular, carbon allotropes such as carbon Vulcan, Ketjenblack, and carbon nanotubes were selected for their unique structures and properties. In addition, various sources of iron (FeCl2, FeCl3, and K[Fe(SCN)4]) were evaluated. The influence of the pyrolysis atmosphere on the resulting Fe-N-C catalyst structures was also assessed. Through an integrated structure and surface chemistry analyses, as well as electrochemical tests with rotating disk electrode experiments in acidic media, the ORR performance and stability of these catalysts were defined. By examining the relationships between carbon sources and iron precursors, this research provides valuable information for the optimization of Fe-N-C catalysts in fuel cell applications.",PEM fuel cells; non-PGM structures; electrocatalysts; oxygen reduction reaction; carbon template,OXYGEN-REDUCTION CATALYSTS; ACTIVE-SITES; CARBON; IRON; MORPHOLOGY,PEM fuel cells;non-PGM structures;electrocatalysts;oxygen reduction reaction;carbon template;OXYGEN-REDUCTION CATALYSTS;ACTIVE-SITES;CARBON;IRON;MORPHOLOGY,riadal@iceht.forth.gr,,"ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND",,,,MDPI,,,,,English,CATALYSTS,Article,WoS,Chemistry,WOS:001364169400001,2-s2.0-85210570043,Greece,iceht.forth.gr,Fdn Res & Technol Hellas;Univ Patras,"Fdn Res & Technol Hellas, Greece;Univ Patras, Greece","Maniatis, Ilias; Charalampopoulos, Georgios; Paloukis, Fotios; Daletou, Maria K."
"Zheng, J., Lai, C., Chen, W., Liu, C., Yuan, T., Lv, J., Zhao, B., Dang, D., Long, G., Wang, T., Han, X.",Optimizing the Coordination Energy of Co-Nx Sites by Co Nanoparticles Integrated with Fe-NCNTs for Boosting PEMFC and Zn-Air Battery Performance,2025,Small,21,10,2411894,,,,10,10.1002/smll.202411894,https://www.scopus.com/inward/record.uri?eid=2-s2.0-86000435127&doi=10.1002%2Fsmll.202411894&partnerID=40&md5=c2154e77b27e4cf2705c9f30ea3ff85d,"Guangdong University of Technology, Guangzhou, Guangdong, China; Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang, Guangdong, China; School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong, China; School of Chemistry and Chemical Engineering, Guangxi Minzu University, Nanning, Guangxi, China; Tianjin University, Tianjin, China","Zheng, Jie, Guangdong University of Technology, Guangzhou, Guangdong, China, Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang, Guangdong, China; Lai, Chunxu, Guangdong University of Technology, Guangzhou, Guangdong, China, Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang, Guangdong, China; Chen, Wenxuan, Guangdong University of Technology, Guangzhou, Guangdong, China, Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang, Guangdong, China; Liu, Chao, Guangdong University of Technology, Guangzhou, Guangdong, China, Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang, Guangdong, China; Yuan, Tenghui, School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong, China; Lv, Jieying, Guangdong University of Technology, Guangzhou, Guangdong, China, Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang, Guangdong, China; Zhao, Bote, School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong, China; Dang, Dai, Guangdong University of Technology, Guangzhou, Guangdong, China, Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang, Guangdong, China; Long, Guifa, School of Chemistry and Chemical Engineering, Guangxi Minzu University, Nanning, Guangxi, China; Wang, Tiejun, Guangdong University of Technology, Guangzhou, Guangdong, China, Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang, Guangdong, China; Han, Xiaopeng, Tianjin University, Tianjin, China","Enhancing the catalytic performance and durability of M-N─C catalyst is crucial for the efficient operation of proton exchange membrane fuel cells (PEMFCs) and Zn-Air batteries (ZABs). Herein, an approach is developed for the in situ fabrication of a MOFs-derived porous carbon material, co-loaded with Co nanoparticles (NPs) and Co-N<inf>x</inf> sites and integrated onto Fe-doped carbon nanotubes (CNTs), named Co<inf>NP/SA</inf>-NC/Fe-NCNTs. Incorporating polymer-wrapped CNTs improves MOFs dispersion annealing at high temperature, which amplifies the three-phase boundary (TPB) by generating much more mesopores and exposing additional active sites within the catalysts layer. Furthermore, density functional theory (DFT) calculations indicate that the presence of Co NPs promotes the conversion of oxygen-containing intermediates for Co-N<inf>x</inf> sites. The optimized catalysts display a half-wave potential of 0.9 V (vs RHE) for oxygen reduction reaction (ORR) and a low overpotential of 327 mV at 10 mA cm−2 for oxygen evolution reaction (OER) in alkaline media, which significantly outperforms the counterpart single structure, as well as noble-metal-based catalysts. Specifically, the PEMFCs and ZABs derived from Co<inf>NP/SA</inf>-NC/Fe-NCNTs catalyst exhibit power densities of 702 and 192 mW cm−2, respectively. This work offers novel insights into the synthesis of the composited bifunctional carbon materials for ZABs and PEMFCs application. © 2025 Wiley-VCH GmbH.",M-N-C catalyst; MOF-derived; PEMFCs; Zn-Air batteries,Bioremediation; Carbon carbon composites; Oxygen evolution reaction; Oxygen reduction reaction; Rate constants; Reaction intermediates; Zinc air batteries; Zinc alloys; Battery performance; Catalytic performance; Co Nanoparticles; Coordination energies; In-situ fabrication; M-N-C catalyst; MOF-derived; Porous carbon materials; Proton-exchange membranes fuel cells; ]+ catalyst; Electrolytic reduction; carbon; carbon nanotube; nanoparticle; oxygen; polymer; proton; air; article; calculation; catalysis; catalyst; controlled study; density functional theory; dispersion; energy; fuel; high temperature; membrane; oxygen evolution reaction; pharmaceutics; synthesis,M-N-C catalyst;MOF-derived;PEMFCs;Zn-Air batteries;Bioremediation;Carbon carbon composites;Oxygen evolution reaction;Oxygen reduction reaction;Rate constants;Reaction intermediates;Zinc air batteries;Zinc alloys;Battery performance;Catalytic performance;Co Nanoparticles;Coordination energies;In-situ fabrication;Porous carbon materials;Proton-exchange membranes fuel cells;]+ catalyst;Electrolytic reduction;carbon;carbon nanotube;nanoparticle;oxygen;polymer;proton;air;article;calculation;catalysis;catalyst;controlled study;density functional theory;dispersion;energy;fuel;high temperature;membrane;pharmaceutics;synthesis,"D. Dang; School of Chemical Engineering and Light Industry, Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangdong University of Technology, Guangzhou, 510006, China; email: dangdai@gdut.edu.cn; G. Long; Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, School of Chemistry and Chemical Engineering, Guangxi Minzu University, Nanning, 530008, China; email: gflong@gxmzu.edu.cn; X. Han; School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), Tianjin University, Tianjin, 300072, China; email: xphan@tju.edu.cn",,,,,,John Wiley and Sons Inc,16136810,,SMALB,39801169,English,Small,Article,Scopus,,2-s2.0-86000435127,,China,gdut.edu.cn,,,"Zheng, J.; Lai, C.; Chen, W.; Liu, C.; Yuan, T.; Lv, J.; Zhao, B.; Dang, D.; Long, G.; Wang, T.; Han, X."
"Kong, A., Zhu, X., Han, Z., Yu, Y., Zhang, Y., Dong, B., Shan, Y.",Ordered hierarchically micro- and mesoporous Fe-Nx-embedded graphitic architectures as efficient electrocatalysts for oxygen reduction reaction,2014,ACS Catalysis,4,6,,1793,1800,,214,10.1021/cs401257j,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84902158058&doi=10.1021%2Fcs401257j&partnerID=40&md5=fc9d0e538a5edf323b383781c6359e56,"Department of Chemistry, East China Normal University, Shanghai, China","Kong, Aiguo, Department of Chemistry, East China Normal University, Shanghai, China; Zhu, Xiaofang, Department of Chemistry, East China Normal University, Shanghai, China; Han, Zhen, Department of Chemistry, East China Normal University, Shanghai, China; Yu, Youyi, Department of Chemistry, East China Normal University, Shanghai, China; Zhang, Yongbo, Department of Chemistry, East China Normal University, Shanghai, China; Dong, Bin, Department of Chemistry, East China Normal University, Shanghai, China; Shan, Yongkui, Department of Chemistry, East China Normal University, Shanghai, China","A series of novel ordered hierarchically micro- and mesoporous Fe-N <inf>x</inf>-embedded graphitic architectures (Fe-N-GC) are directly prepared by the simple pyrolysis of the different nitrogen heterocyclic compounds and iron chlorides in the confined mesochannels of SBA-15. Among these porous Fe-N-GC materials, the sample prepared by heating 2,2-bipyridine and Fe chelates at 900 °C shows the more positive ORR onset potential and half-wave potential (E 1/2) values than commercial Pt-C catalysts in 0.1 M KOH, which illustrate that it is one of the most-promising nonprecious metal catalysts (NPMCs) among the reported NMPCs in alkaline medium. Moreover, unlike nitrogen-doped carbons and Co<inf>3</inf>O<inf>4</inf>/carbon composites, high ORR current density (5.2 mA cm-2, 0.6 V) over this Fe-N-GC electrode with catalyst loading of 0.6 mg cm-2 can be also obtained in 0.1 M HClO<inf>4</inf> acidic solution, which is about 0.6 mA cm-2 larger than that over the electrode of commercial Pt/C with 20 μg<inf>Pt</inf> cm-2 loading. In addition, the effective embedding of active moieties in the graphitic frameworks and a direct four-electron reduction pathway in ORR contributes to its high durability in both alkaline and acidic media. Its excellent ORR activity should be ascribed to the optimized balance between active site density and capability for mass and charge transport. Such hierarchically porous Fe-N<inf>x</inf>-graphitic materials hold great promise for the practical utilization in cathode catalyst layers of proton exchange membrane fuel cells. © 2014 American Chemical Society.",direct synthesis; hierarchically porous structures; nanostructures; nonprecious metal catalysts; oxygen reduction,Chlorine compounds; Electrocatalysts; Electrodes; Electrolytic reduction; Nanostructures; Platinum; Proton exchange membrane fuel cells (PEMFC); Synthesis (chemical); Cathode catalyst layers; Direct synthesis; Four-electron reduction; Hierarchically porous; Nitrogen heterocyclic compounds; Non-precious metal catalysts; Oxygen Reduction; Oxygen reduction reaction; Iron compounds,direct synthesis;hierarchically porous structures;nanostructures;nonprecious metal catalysts;oxygen reduction;Chlorine compounds;Electrocatalysts;Electrodes;Electrolytic reduction;Platinum;Proton exchange membrane fuel cells (PEMFC);Synthesis (chemical);Cathode catalyst layers;Four-electron reduction;Hierarchically porous;Nitrogen heterocyclic compounds;Non-precious metal catalysts;Oxygen reduction reaction;Iron compounds,"Y. Shan; Department of Chemistry, East China Normal University, Shanghai 200241, 500 Dongchuan Road, China; email: ykshan@chem.ecnu.edu.cn",,,,,,American Chemical Society service@acs.org,21555435,,ACCAC,,English,ACS Catal.,Article,Scopus,,2-s2.0-84902158058,,China,chem.ecnu.edu.cn,,,"Kong, A.; Zhu, X.; Han, Z.; Yu, Y.; Zhang, Y.; Dong, B.; Shan, Y."
"Alvarez-Manuel, L., Alegre, C., Sebastian, D., Lazaro Elorri, M.J.",Organic xerogels combined with iron and nitrogen as PGM-free catalysts for the oxygen reduction reaction,2024,International Journal of Hydrogen Energy,52,,,1076,1089,,9,10.1016/j.ijhydene.2023.06.184,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85164309421&doi=10.1016%2Fj.ijhydene.2023.06.184&partnerID=40&md5=e05ba5067e87a7ceaf1d12bdcd2f1f29,"CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain","Álvarez-Manuel, Laura, CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Alegre, Cinthia, CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Sebastián, D., CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Lázaro Elorri, María Jesús, CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain","Platinum-group-metal free catalysts have been widely studied in the last decade as an alternative to Pt, employed in fuel cells. Several carbon precursors have been investigated as carbon matrix for iron-nitrogen-carbon (Fe–N–C) catalysts, characterized by a large amount of micropores, fundamental to create Fe-N<inf>x</inf>-C active sites. Nonetheless, it is also acknowledged that wider pores are needed to facilitate mass transfer of oxygen/water (reagent/product of fuel cells) towards/from the active sites. Organic xerogels are known as easily tunable materials, that allow doping with a variety of heteroatoms. The present manuscript presents an investigation on the use of organic xerogels combined with iron and nitrogen in a single-step to obtain Fe–N-CXG electro-catalysts for the oxygen reduction reaction (ORR) of proton exchange membrane fuel cells. Several features of both organic xerogels and catalysts on the ORR activity are assessed: the textural properties of the organic xerogel, the iron loading of the Fe–N–C catalysts and the effect of acid-leaching of the catalysts. The present study proves the feasibility of using organic xerogels as carbon precursor to obtain PGM-free catalysts in an easy manner and scalable single-step synthesis. Catalysts obtained from organic xerogels synthesized at mildly acid pHs (5.8 and 6), with a nominal iron loading of 2 wt%, and subjected to two sets of acid leaching/thermal treatments, present enhanced catalytic activity towards the ORR. © 2023 The Authors",Fe–N–C catalysts; Fuel cells; Organic xerogels; Oxygen reduction reaction,Carbon; Catalyst activity; Electrolytic reduction; Iron; Leaching; Mass transfer; Nitrogen; Proton exchange membrane fuel cells (PEMFC); Synthesis (chemical); Xerogels; Acid leaching; Active site; Carbon precursors; Fe–N–C catalyst; Iron loading; Organic xerogel; Organics; Oxygen reduction reaction; Platinum group metals; ]+ catalyst; Oxygen,Fe–N–C catalysts;Fuel cells;Organic xerogels;Oxygen reduction reaction;Carbon;Catalyst activity;Electrolytic reduction;Iron;Leaching;Mass transfer;Nitrogen;Proton exchange membrane fuel cells (PEMFC);Synthesis (chemical);Xerogels;Acid leaching;Active site;Carbon precursors;Fe–N–C catalyst;Iron loading;Organic xerogel;Organics;Platinum group metals;]+ catalyst;Oxygen,"C. Alegre; Instituto de Carboquímica, Consejo Superior de Investigaciones Científicas, Zaragoza, C/. Miguel Luesma Castán, 4., 50018, Spain; email: cinthia@icb.csic.es; M.J. Lázaro; Instituto de Carboquímica, Consejo Superior de Investigaciones Científicas, Zaragoza, C/. Miguel Luesma Castán, 4., 50018, Spain; email: mlazaro@icb.csic.es",,,,,,Elsevier Ltd,03603199,0080311393,IJHED,,English,Int J Hydrogen Energy,Article,Scopus,,2-s2.0-85164309421,,Spain,icb.csic.es,,,"Alvarez-Manuel, L.; Alegre, C.; Sebastian, D.; Lazaro Elorri, M.J."
"Meyer, Q., Yang, C.J., Cheng, Y., Zhao, C.",Overcoming the Electrode Challenges of High-Temperature Proton Exchange Membrane Fuel Cells,2023,ELECTROCHEMICAL ENERGY REVIEWS,6,1,16,,,40,108,10.1007/s41918-023-00180-y,,"[Meyer, Quentin; Zhao, Chuan] Univ New South Wales, Sch Chem, Sydney, NSW 2052, Australia; [Yang, Chujie; Cheng, Yi] Cent South Univ, Hunan Prov Key Lab Nonferrous Value Added Met, Changsha 410083, Hunan, Peoples R China",,"Proton exchange membrane fuel cells (PEMFCs) are becoming a major part of a greener and more sustainable future. However, the costs of high-purity hydrogen and noble metal catalysts alongside the complexity of the PEMFC system severely hamper their commercialization. Operating PEMFCs at high temperatures (HT-PEMFCs, above 120 degrees C) brings several advantages, such as increased tolerance to contaminants, more affordable catalysts, and operations without liquid water, hence considerably simplifying the system. While recent progresses in proton exchange membranes for HT-PEMFCs have made this technology more viable, the HT-PEMFC viscous acid electrolyte lowers the active site utilization by unevenly diffusing into the catalyst layer while it acutely poisons the catalytic sites. In recent years, the synthesis of platinum group metal (PGM) and PGM-free catalysts with higher acid tolerance and phosphate-promoted oxygen reduction reaction, in conjunction with the design of catalyst layers with improved acid distribution and more triple-phase boundaries, has provided great opportunities for more efficient HT-PEMFCs. The progress in these two interconnected fields is reviewed here, with recommendations for the most promising routes worthy of further investigation. Using these approaches, the performance and durability of HT-PEMFCs will be significantly improved.",High-temperature proton exchange membrane fuel cells; Platinum catalysts; Platinum-group metal-free catalysts; Phosphate-tolerant electrode,OXYGEN REDUCTION REACTION; ACID DOPED POLYBENZIMIDAZOLE; GAS-DIFFUSION ELECTRODE; N-C CATALYSTS; FUNCTIONALIZED CARBON NANOTUBES; FE-N/C ELECTROCATALYSTS; PHOSPHORIC-ACID; HIGH-PERFORMANCE; COMPOSITE MEMBRANES; MICROPOROUS LAYER,High-temperature proton exchange membrane fuel cells;Platinum catalysts;Platinum-group metal-free catalysts;Phosphate-tolerant electrode;OXYGEN REDUCTION REACTION;ACID DOPED POLYBENZIMIDAZOLE;GAS-DIFFUSION ELECTRODE;N-C CATALYSTS;FUNCTIONALIZED CARBON NANOTUBES;FE-N/C ELECTROCATALYSTS;PHOSPHORIC-ACID;HIGH-PERFORMANCE;COMPOSITE MEMBRANES;MICROPOROUS LAYER,yi.cheng@csu.edu.cn; chuan.zhao@unsw.edu.au,,"CAMPUS, 4 CRINAN ST, LONDON, N1 9XW, ENGLAND",,,,SPRINGERNATURE,2520-8489,,,,English,ELECTROCHEM ENERGY R,Review,WoS,Electrochemistry,WOS:000962814400001,,Australia;China,csu.edu.cn,Univ New South Wales;Cent South Univ,"Univ New South Wales, Australia;Cent South Univ, China","Meyer, Quentin; Yang, Chujie; Cheng, Yi; Zhao, Chuan"
"Lykhach, Y., Bruix, A., Fabris, S., Potin, V., Matolinova, I., Matolin, V., Libuda, J., Neyman, K.M.",Oxide-based nanomaterials for fuel cell catalysis: The interplay between supported single Pt atoms and particles,2017,Catalysis Science and Technology,7,19,,4315,4345,,86,10.1039/c7cy00710h,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85027682299&doi=10.1039%2Fc7cy00710h&partnerID=40&md5=b99ad0a1937574b36dc0747c3b731de5,"Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; Department of Physics and Astronomy, Aarhus Universitet, Aarhus, Midtjylland, Denmark; CNR-Istituto Officina dei Materiali, Trieste, TS, Italy; Laboratoire Interdisciplinaire Carnot de Bourgogne, Dijon, Bourgogne-Franche-Comte, France; Department of Surface and Plasma Science, Charles University, Prague, Czech Republic; Erlangen Catalysis Resource Center, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; Departament de Ciència de Materials i Química Física, Universitat de Barcelona, Barcelona, Barcelona, Spain; Institució Catalana de Recerca i Estudis Avançats, Barcelona, Barcelona, Spain","Lykhach, Yaroslava, Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; Bruix, Albert, Department of Physics and Astronomy, Aarhus Universitet, Aarhus, Midtjylland, Denmark; Fabris, Stefano, CNR-Istituto Officina dei Materiali, Trieste, TS, Italy; Potin, Valérie, Laboratoire Interdisciplinaire Carnot de Bourgogne, Dijon, Bourgogne-Franche-Comte, France; Matolínová, Iva, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic; Matolín, Vladimír, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic; Libuda, Joerg, Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany, Erlangen Catalysis Resource Center, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; Neyman, Konstantin M., Departament de Ciència de Materials i Química Física, Universitat de Barcelona, Barcelona, Barcelona, Spain, Institució Catalana de Recerca i Estudis Avançats, Barcelona, Barcelona, Spain","The concept of single atom catalysis offers maximum noble metal efficiency for the development of low-cost catalytic materials. Among possible applications are catalytic materials for proton exchange membrane fuel cells. In the present review, recent efforts towards the fabrication of single atom catalysts on nanostructured ceria and their reactivity are discussed in the prospect of their employment as anode catalysts. The remarkable performance and the durability of the ceria-based anode catalysts with ultra-low Pt loading result from the interplay between two states associated with supported atomically dispersed Pt and sub-nanometer Pt particles. The occurrence of these two states is a consequence of strong interactions between Pt and nanostructured ceria that yield atomically dispersed species under oxidizing conditions and sub-nanometer Pt particles under reducing conditions. The square-planar arrangement of four O atoms on {100} nanoterraces has been identified as the key structural element on the surface of the nanostructured ceria where Pt is anchored in the form of Pt2+ species. The conversion of Pt2+ species to sub-nanometer Pt particles is triggered by a redox process involving Ce3+ centers. The latter emerge due to either oxygen vacancies or adsorption of reducing agents. The unique properties of the sub-nanometer Pt particles arise from metal-support interactions involving charge transfer, structural flexibility, and spillover phenomena. The abundance of specific adsorption sites similar to those on {100} nanoterraces determines the ideal (maximum) Pt loading in Pt-CeO<inf>x</inf> films that still allows reversible switching between the atomically dispersed Pt and sub-nanometer particles yielding high activity and durability during fuel cell operation. © 2017 The Royal Society of Chemistry.",,Anodes; Atoms; Catalysis; Catalysts; Charge transfer; Durability; Electrodes; Fuel cells; Oxygen vacancies; Platinum; Precious metals; Proton exchange membrane fuel cells (PEMFC); Reducing agents; Catalytic materials; Fuel cell operation; Metal-support interactions; Oxidizing conditions; Reducing conditions; Reversible switching; Specific adsorption; Structural flexibilities; Platinum metals,Anodes;Atoms;Catalysis;Catalysts;Charge transfer;Durability;Electrodes;Fuel cells;Oxygen vacancies;Platinum;Precious metals;Proton exchange membrane fuel cells (PEMFC);Reducing agents;Catalytic materials;Fuel cell operation;Metal-support interactions;Oxidizing conditions;Reducing conditions;Reversible switching;Specific adsorption;Structural flexibilities;Platinum metals,"Y. Lykhach; Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Egerlandstrasse 3, 91058, Germany; email: yaroslava.lykhach@fau.de",,,,,,Royal Society of Chemistry,20444753,,CSTAG,,English,Catal. Sci. Technolog.,Review,Scopus,,2-s2.0-85027682299,,Germany;Denmark;Italy;France;Czech Republic;Spain,fau.de,,,"Lykhach, Y.; Bruix, A.; Fabris, S.; Potin, V.; Matolinova, I.; Matolin, V.; Libuda, J.; Neyman, K.M."
"Luo, J.M., Zhang, Y.T., Lu, Z., Liu, C., Xu, Y.S., Chen, H., Wang, Q., Wu, D.X., Dang, D., Deng, Y.J., Rao, P., Deng, P.L., Li, J., Miao, Z.P., Tian, X.L.",Oxygen-Coordinated Cr Single-Atom Catalyst for Oxygen Reduction Reaction in Proton Exchange Membrane Fuel Cells,2025,ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,64,17,,,,9,25,10.1002/anie.202500500,,"[Luo, Junming; Zhang, Yating; Lu, Zhe; Xu, Yueshan; Chen, Hui; Wang, Qi; Wu, Daoxiong; Rao, Peng; Deng, Peilin; Li, Jing; Miao, Zhengpei; Tian, Xinlong] Hainan Univ, Sch Marine Sci & Engn, State Key Lab Trop Ocean Engn Mat & Mat Evaluat, Hainan Prov Key Lab Fine Chem, Haikou 570228, Peoples R China; [Liu, Chao; Dang, Dai] Guangdong Univ Technol, Sch Chem Engn & Light Ind, Guangzhou 510006, Peoples R China; [Deng, Yijie] Univ South China, Sch Resource Environm & Safety Engn, Hengyang 421001, Peoples R China",,"Carbon-supported metal single-atom catalysts (M-SACs) are promising oxygen reduction reaction (ORR) catalysts. Their ORR activity and selectivity are significantly affected by the heteroatoms that coordinate the central metal atoms. Previous reports found that oxygen-coordinated M-SACs promoted a 2e- ORR rather than the 4e- ORR that is more desirable for fuel cells. Herein, we report for the first time that oxygen-coordinated M-SACs are capable of promoting the 4e- ORR in acid media. We prepared a Cr(acac)-NC catalyst with the central Cr atom coordinated by two O atoms. The Cr(acac)-NC catalyst not only exhibits excellent ORR activity and stability in acid media, but also delivers high proton exchange membrane fuel cell (PEMFC) performance comparable to N-coordinated M-SACs. Density functional theory (DFT) calculations reveal that Cr-O2 moieties located on the zigzag edge of the carbon support are the ORR-active sites.",fuel cells; oxygen reduction reaction; chromium; single-atom catalyst; electrocatalysis,CARBON,fuel cells;oxygen reduction reaction;chromium;single-atom catalyst;electrocatalysis;CARBON,daoxiong@hainanu.edu.cn; dangdai@gdut.edu.cn; tianxl@hainanu.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,,,,39932362,English,ANGEW CHEM INT EDIT,Article,WoS,Chemistry,WOS:001422733600001,2-s2.0-105003089685,China,hainanu.edu.cn,Hainan Univ;Guangdong Univ Technol;Univ South China,"Hainan Univ, China;Guangdong Univ Technol, China;Univ South China, China","Luo, Junming; Zhang, Yating; Lu, Zhe; Liu, Chao; Xu, Yueshan; Chen, Hui; Wang, Qi; Wu, Daoxiong; Dang, Dai; Deng, Yijie; Rao, Peng; Deng, Peilin; Li, Jing; Miao, Zhengpei; Tian, Xinlong"
"Jaouen, F., Goellner, V., Lefevre, M., Herranz, J., Proietti, E., Dodelet, J.P.",Oxygen reduction activities compared in rotating-disk electrode and proton exchange membrane fuel cells for highly active Fe-N-C catalysts,2013,ELECTROCHIMICA ACTA,87,,,619,628,10,118,10.1016/j.electacta.2012.09.057,,"[Jaouen, F.; Lefevre, M.; Herranz, J.; Proietti, E.; Dodelet, J. P.] INRS Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada; [Jaouen, F.; Goellner, V.] Univ Montpellier 2, Inst Charles Gerhardt, F-34095 Montpellier, France",,"In the past three years, two novel synthesis methods for non-precious metal catalysts resulting in a breakthrough of their activity and performance at the cathode of the proton-exchange membrane fuel cell (PEMFC) have been reported by the group of Prof. Dodelet. While the activity of these novel Fe-based catalysts for the oxygen reduction reaction is very high in PEMFC, our preliminary activity measurements with the rotating disk electrode (ROE) technique on one of them showed an activity being a factor 30-100 lower than the one measured in PEMFC at 80 degrees C. The present work explains to a large extent this huge difference. Two Fe-N-C catalysts synthesized via our novel approaches and one Fe-N-C catalyst synthesized via our classical approach were investigated in RDE and PEMFC. In both systems, the effect of the ink formulation (Nafion-to-catalyst ratio) was investigated. Optimization of the RDE ink formulation explains a factor between 5 and 10 in the two-decade gap mentioned above. Then, the effect of temperature in the RDE system was investigated. An increase from 20 to 80 degrees C was found to result in a theoretical maximum twofold increase in activity. However, in practice, decreased O-2 solubility with increased temperature cancels this effect. After taking into account these two parameters, a difference in ORR activity between RDE and PEMFC of ca a factor five still remained for one of the two novel Fe-N-C catalysts investigated here. The lower initial activity measured in RDE for this catalyst is shown to be due to the fast adsorption of anions (HSO4-) from the liquid H2SO4 electrolyte on protonated nitrogen atoms (NH+) found on its surface. The phenomenon of anion adsorption and associated decreased ORR activity also applies to the other novel Fe-N-C catalyst, but is slower and does not immediately occur in RDE. (C) 2012 Elsevier Ltd. All rights reserved.",Fuel cell; Non precious metal; Catalyst; Rotating disk electrode,TEMPERATURE-DEPENDENCE; FE/N/C CATALYSTS; ALKALINE-MEDIUM; O-2 REDUCTION; METAL ELECTROCATALYSTS; CATHODE CATALYST; ACID-SOLUTIONS; PLATINUM; IRON; ELECTROREDUCTION,Fuel cell;Non precious metal;Catalyst;Rotating disk electrode;TEMPERATURE-DEPENDENCE;FE/N/C CATALYSTS;ALKALINE-MEDIUM;O-2 REDUCTION;METAL ELECTROCATALYSTS;CATHODE CATALYST;ACID-SOLUTIONS;PLATINUM;IRON;ELECTROREDUCTION,frederic.jaouen@univ-montp2.fr; dodelet@emt.inrs.ca,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000315171100078,2-s2.0-84870204775,Canada;France,univ-montp2.fr,INRS Energie Mat & Telecommun;Univ Montpellier 2,"INRS Energie Mat & Telecommun, Canada;Univ Montpellier 2, France","Jaouen, F.; Goellner, V.; Lefevre, M.; Herranz, J.; Proietti, E.; Dodelet, J. P."
"Yuan, C., Zhang, S.M., Zhang, J.J.",Oxygen reduction electrocatalysis: From conventional to single-atomic platinum-based catalysts for proton exchange membrane fuel cells,2024,FRONTIERS IN ENERGY,18,2,,206,222,17,26,10.1007/s11708-023-0907-3,,"[Yuan, Cheng; Zhang, Shiming; Zhang, Jiujun] Shanghai Univ, Inst Sustainable Energy, Coll Sci, Shanghai 200444, Peoples R China",,"Platinum (Pt)-based materials are still the most efficient and practical catalysts to drive the sluggish kinetics of cathodic oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). However, their catalysis and stability performance still need to be further improved in terms of corrosion of both carbon support and Pt catalyst particles as well as Pt loading reduction. Based on the developed synthetic strategies of alloying/nanostructuring Pt particles and modifying/innovating supports in developing conventional Pt-based catalysts, Pt single-atom catalysts (Pt SACs) as the recently burgeoning hot materials with a potential to achieve the maximum utilization of Pt are comprehensively reviewed in this paper. The design thoughts and synthesis of various isolated, alloyed, and nanoparticle-contained Pt SACs are summarized. The single-atomic Pt coordinating with non-metals and alloying with metals as well as the metal-support interactions of Pt single-atoms with carbon/non-carbon supports are emphasized in terms of the ORR activity and stability of the catalysts. To advance further research and development of Pt SACs for viable implementation in PEMFCs, various technical challenges and several potential research directions are outlined.",oxygen reduction electrocatalysis; Pt singleatom catalysts; conventional Pt-based catalysts; design thoughts and synthesis; metal-support interactions,SYNTHETIC STRATEGIES; ENHANCED ACTIVITY; EFFICIENT; CARBON; ALLOY; NANOPARTICLES; HYDROGENATION; DURABILITY; SUPPORTS; METALS,oxygen reduction electrocatalysis;Pt singleatom catalysts;conventional Pt-based catalysts;design thoughts and synthesis;metal-support interactions;SYNTHETIC STRATEGIES;ENHANCED ACTIVITY;EFFICIENT;CARBON;ALLOY;NANOPARTICLES;HYDROGENATION;DURABILITY;SUPPORTS;METALS,smzhang@shu.edu.cn; jiujun.zhang@i.shu.edu.cn,,"CHAOYANG DIST, 4, HUIXINDONGJIE, FUSHENG BLDG, BEIJING 100029, PEOPLES R CHINA",,,,HIGHER EDUCATION PRESS,2095-1701,,,,English,FRONT ENERGY,Review,WoS,Energy & Fuels,WOS:001105803500001,2-s2.0-85177577182,China,shu.edu.cn,Shanghai Univ,"Shanghai Univ, China","Yuan, Cheng; Zhang, Shiming; Zhang, Jiujun"
"Barazzouk, S., Lefevre, M., Dodelet, J.P.",Oxygen Reduction in PEM Fuel Cells: Fe-Based Electrocatalysts Made with High Surface Area Activated Carbon Supports,2009,JOURNAL OF THE ELECTROCHEMICAL SOCIETY,156,12,,B1466,B1474,9,18,10.1149/1.3242293,,"[Barazzouk, Said; Lefevre, Michel; Dodelet, Jean-Pol] Inst Natl Rech Sci Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada",,"Catalysts for the oxygen reduction reaction in polymer electrolyte membrane (PEM) fuel cells were prepared by impregnating four high surface area activated carbons (ACs), namely, Ax-21, CNS-201, IRH-33, and IRH-40, with 0.2 wt % nominal Fe as ferrous acetate, and then by pyrolyzing them for various times in NH3 at 950 degrees C. Among the catalysts made with as-received ACs, high activity was only obtained for those made with Ax-21, which is the only AC having mainly carboxylate surface groups. In the aerated aqueous solution of iron(II) acetate (pH 5 +/- 0.5) used for Fe impregnation, these surface functionalities ligated with free Fe2+ ions and subsequently yielded active sites upon pyrolysis in NH3. It is, nonetheless, possible to obtain high activities using other ACs provided that they are first treated in concentrated HNO3 to generate carboxylic functionalities at their surface. It is believed that Fe/N/C-type catalytic sites are hosted in AC micropores. Fuel cell tests performed with the best catalyst from each AC series show very similar polarization curves with an initial mass activity at 0.8 V ranging from 11 to 22 mA mg(-1). (C) 2009 The Electrochemical Society. [DOI: 10.1149/1.3242293] All rights reserved.",,CO-C-N; HEAT-TREATMENT AFFECT; CATHODE CATALYST; O-2 REDUCTION; ELECTROCHEMICAL CHARACTERISTICS; NONPLATINUM ELECTROCATALYSTS; NONNOBLE ELECTROCATALYSTS; SPUTTER-DEPOSITION; FE/N/C CATALYSTS; ELECTROLYTE,CO-C-N;HEAT-TREATMENT AFFECT;CATHODE CATALYST;O-2 REDUCTION;ELECTROCHEMICAL CHARACTERISTICS;NONPLATINUM ELECTROCATALYSTS;NONNOBLE ELECTROCATALYSTS;SPUTTER-DEPOSITION;FE/N/C CATALYSTS;ELECTROLYTE,dodelet@emt.inrs.ca,,"65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA",,,,ELECTROCHEMICAL SOC INC,0013-4651,,,,English,J ELECTROCHEM SOC,Article,WoS,Electrochemistry; Materials Science,WOS:000271218900026,2-s2.0-70350705761,Canada,emt.inrs.ca,Inst Natl Rech Sci Energie Mat & Telecommun,"Inst Natl Rech Sci Energie Mat & Telecommun, Canada","Barazzouk, Said; Lefevre, Michel; Dodelet, Jean-Pol"
"Xia, X., Ma, Z., Huang, Y.",Oxygen reduction reaction activity of Fe-based dual-atom catalysts with different local configurations via graph neural representation,2024,Chinese Journal of Chemical Physics,37,5,,599,604,,2,10.1063/1674-0068/cjcp2408114,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85209945458&doi=10.1063%2F1674-0068%2Fcjcp2408114&partnerID=40&md5=49b6b0ff9731c71790677ceb0faafce7,"College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui, China","Xia, Xueqian, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui, China; Ma, Zengying, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui, China; Huang, Yucheng, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui, China","The performance of proton exchange membrane fuel cells depends heavily on the oxygen reduction reaction (ORR) at the cathode, for which platinum-based catalysts are currently the standard. The high cost and limited availability of platinum have driven the search for alternative catalysts. While FeN<inf>4</inf> single-atom catalysts have shown promising potential, their ORR activity needs to be further enhanced. In contrast, dual-atom catalysts (DACs) offer not only higher metal loading but also the ability to break the ORR scaling relations. However, the diverse local structures and tunable coordination environments of DACs create a vast chemical space, making large-scale computational screening challenging. In this study, we developed a graph neural network (GNN)-based framework to predict the ORR activity of Fe-based DACs, effectively addressing the challenges posed by variations in local catalyst structures. Our model, trained on a dataset of 180 catalysts, accurately predicted the Gibbs free energy of ORR intermediates and overpotentials, and identified 32 DACs with superior catalytic activity compared to FeN<inf>4</inf> SAC. This approach not only advances the design of high-performance DACs, but also offers a powerful computational tool that can significantly reduce the time and cost of catalyst development, thereby accelerating the commercialization of fuel cell technologies. © 2024 Chinese Physical Society.",Artificial intelligence; Density functional theory; Dual-atom catalyst; Graph neural representation; Oxygen reduction reaction,Antiknock compounds; Coordination reactions; Electrolytic reduction; Gibbs free energy; Graph neural networks; Network theory (graphs); Oxygen reduction reaction; Platinum compounds; Reaction intermediates; Density-functional-theory; Dual-atom catalyst; Fe-based; Graph neural representation; Local configurations; Neural representations; Performance; Reaction activity; ]+ catalyst; Platinum,Artificial intelligence;Density functional theory;Dual-atom catalyst;Graph neural representation;Oxygen reduction reaction;Antiknock compounds;Coordination reactions;Electrolytic reduction;Gibbs free energy;Graph neural networks;Network theory (graphs);Platinum compounds;Reaction intermediates;Density-functional-theory;Fe-based;Local configurations;Neural representations;Performance;Reaction activity;]+ catalyst;Platinum,"Y. Huang; College of Chemistry and Material Science, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecule-Based Materials, Anhui Carbon Neutrality Engineering Center, Anhui Normal University, Wuhu, 241000, China; email: huangyc@mail.almu.edu.cn",,,,,,American Institute of Physics,16740068,,,,English,Chin. J. Chem. Phys.,Article,Scopus,,2-s2.0-85209945458,,China,mail.almu.edu.cn,,,"Xia, X.; Ma, Z.; Huang, Y."
"Sgarbi, R., Kumar, K., Jaouen, F., Zitolo, A., Ticianelli, E.A., Maillard, F.",Oxygen reduction reaction mechanism and kinetics on M-NxCy and M@N-C active sites present in model M-N-C catalysts under alkaline and acidic conditions,2021,Journal of Solid State Electrochemistry,25,1,,45,56,,81,10.1007/s10008-019-04436-w,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85075229816&doi=10.1007%2Fs10008-019-04436-w&partnerID=40&md5=2ccf0cc7bd51741a0262a1afc18bb634,"Instituto de Química de São Carlos, Universidade de São Paulo, Sao Paulo, SP, Brazil; Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; SOLEIL Synchrotron, Gif-sur-Yvette, France","Sgarbi, Ricardo, Instituto de Química de São Carlos, Universidade de São Paulo, Sao Paulo, SP, Brazil, Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Kumar, Kavita, Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Jaouen, Frédéric, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Zitolo, Andrea, SOLEIL Synchrotron, Gif-sur-Yvette, France; Ticianelli, Edson Antonio, Instituto de Química de São Carlos, Universidade de São Paulo, Sao Paulo, SP, Brazil; Maillard, Frédéric M., Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France","M-N-C electrocatalysts (where M is Fe or Co) have been investigated for mitigating the dependence on noble metals when catalyzing the oxygen reduction reaction (ORR) for fuel cell technologies in acidic or alkaline conditions. Rotating disk and rotating ring-disk electrode measurements for Fe-N-C and Co-N-C catalysts demonstrate promising performances and stability for the ORR, while the activity of main suspected active sites (M-N<inf>x</inf>C<inf>y</inf> and M@N-C) has been discussed on the basis of the known physical-chemical properties of the catalysts in acid and alkaline media. Thereupon, it is observed that atomically dispersed Fe-N<inf>x</inf>C<inf>y</inf> sites reach the highest ORR activity in acid media when amplified by an adequate energy binding between the metallic center and the oxygenated reaction intermediates. In contrast, Fe@N-C core-shell sites reach a maximum ORR mass activity in alkaline media through a synergistic effect involving catalyst particles with metallic iron in the core and nitrogen-doped carbon in the shell. [Figure not available: see fulltext.]. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.",Alkaline exchange membrane fuel cell; Co-N-C catalyst; Fe-N-C catalyst; PGM-free catalysts; Proton exchange membrane fuel cell,Alkalinity; Binding sites; Catalyst activity; Chemical stability; Contrast media; Doping (additives); Electrocatalysts; Electrolytic reduction; Iron compounds; Oxygen; Oxygen reduction reaction; Reaction intermediates; Reaction kinetics; Rotating disks; Alkaline conditions; Catalyst particles; Exchange membranes; Fuel cell technologies; Nitrogen-doped carbons; Physical chemical property; Rotating ring-disk electrode; Synergistic effect; Proton exchange membrane fuel cells (PEMFC),Alkaline exchange membrane fuel cell;Co-N-C catalyst;Fe-N-C catalyst;PGM-free catalysts;Proton exchange membrane fuel cell;Alkalinity;Binding sites;Catalyst activity;Chemical stability;Contrast media;Doping (additives);Electrocatalysts;Electrolytic reduction;Iron compounds;Oxygen;Oxygen reduction reaction;Reaction intermediates;Reaction kinetics;Rotating disks;Alkaline conditions;Catalyst particles;Exchange membranes;Fuel cell technologies;Nitrogen-doped carbons;Physical chemical property;Rotating ring-disk electrode;Synergistic effect;Proton exchange membrane fuel cells (PEMFC),"F. Maillard; Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, Grenoble, 38000, France; email: frederic.maillard@lepmi.grenoble-inp.fr; F. Jaouen; CNRS, Université de Montpellier, ENSCM, UMR 5253 Institut Charles Gerhardt Montpellier, Montpellier, 2 place Eugène Bataillon, F-34095, France; email: frederic.jaouen@umontpellier.fr",,,,,,Springer Science and Business Media Deutschland GmbH,14328488,,,,English,J. Solid State Electrochem.,Article,Scopus,,2-s2.0-85075229816,,Brazil;France,lepmi.grenoble-inp.fr,,,"Sgarbi, R.; Kumar, K.; Jaouen, F.; Zitolo, A.; Ticianelli, E.A.; Maillard, F."
"Hu, B., Yang, Y.Q., Cao, W., Wang, X.X., Zhou, C., Mao, Y.Y., Ge, L., Ran, R., Zhou, W.",Patchy Fe-N-C supported low-loading Pt nanoparticles as a highly active cathode for proton exchange membrane fuel cells,2023,JOURNAL OF ALLOYS AND COMPOUNDS,951,,169867,,,8,6,10.1016/j.jallcom.2023.169867,,"[Hu, Bin; Yang, Yongqing; Cao, Wei; Wang, Xixi; Zhou, Chuan; Mao, Yiyang; Ran, Ran; Zhou, Wei] Nanjing Tech Univ, Coll Chem Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Peoples R China; [Ge, Lei] Univ Southern Queensland, Ctr Future Mat, Springfield Campus, Springfield Central, Qld 4300, Australia",,"The high cost and unfavorable catalytic performance for oxygen reduction reaction (ORR) is one of the crucial obstacles that impede widely commercialization of proton-exchange membrane fuel cells (PEMFCs). Herein, we provide a novel, mass-producible ORR catalyst made of low-loading (10 wt%) Pt nanoparticles bound to patchy nitrogen-doped carbon (PNC) with uniformly dispersed FeN4 sites (Pt/FeN4-PNC). The derived catalyst exhibits significantly improved catalytic activity and stability, obtaining a promising mass activity (MA) of 0.94 A mgpt-1 at 0.9 V (vs. RHE) with a negligible decay after 30,000 cycles accelerated durability test (ADT). In the fuel-cell assessment (under H2-Air conditions at 80 celcius), the Pt/FeN4-PNC and Pt/ FeN4-PNC-10 g (scaled-up production) achieved peak power densities of 1.13 W cm-2 and 1.14 W cm-2, respectively, and retained 88.5 % and 88.1 % of the initial values after 30,000 voltage cycles (0.60-0.95 V). The patchy structure of PNC substrate guarantees fast electron routes and resistance to corrosion. With the FeN4 active sites in the PNC substrate, the oxygen molecules are concurrently reduced on the surfaces of the carbon substrate and Pt nanoparticles, thereby causing the ORR reaction zone on the catalyst layer to ex-pand. (c) 2023 Elsevier B.V. All rights reserved.",Low-loading; Patchy nitrogen -doped carbon; FeN4 sites; Scaled-up production; Extra ORR active sites,OXYGEN REDUCTION REACTION; CARBON; ELECTROCATALYSTS; DURABILITY,Low-loading;Patchy nitrogen -doped carbon;FeN4 sites;Scaled-up production;Extra ORR active sites;OXYGEN REDUCTION REACTION;CARBON;ELECTROCATALYSTS;DURABILITY,ranr@njtech.edu.cn; zhouwei1982@njtech.edu.cn,,"PO BOX 564, 1001 LAUSANNE, SWITZERLAND",,,,ELSEVIER SCIENCE SA,0925-8388,,,,English,J ALLOY COMPD,Article,WoS,Chemistry; Materials Science; Metallurgy & Metallurgical Engineering,WOS:000981732300001,2-s2.0-85151559791,China;Australia,njtech.edu.cn,Nanjing Tech Univ;Univ Southern Queensland,"Nanjing Tech Univ, China;Univ Southern Queensland, Australia","Hu, Bin; Yang, Yongqing; Cao, Wei; Wang, Xixi; Zhou, Chuan; Mao, Yiyang; Ge, Lei; Ran, Ran; Zhou, Wei"
"Luo, F., Roy, A.R., Silvioli, L., Cullen, D.A., Zitolo, A., Sougrati, M.T., Oguz, I.C., Mineva, T., Teschner, D., Wagner, S., Wen, J., Dionigi, F., Kramm, U.I., Rossmeisl, J., Jaouen, F., Strasser, P.",P-block single-metal-site tin/nitrogen-doped carbon fuel cell cathode catalyst for oxygen reduction reaction,2020,NATURE MATERIALS,19,11,,1215,+,10,367,10.1038/s41563-020-0717-5,,"[Luo, Fang; Wen, Ju; Dionigi, Fabio; Strasser, Peter] Tech Univ Berlin, Dept Chem, Chem Engn Div, Electrochem Energy Catalysis & Mat Sci Lab, Berlin, Germany; [Roy, Aaron; Sougrati, Moulay Tahar; Oguz, Ismail Can; Mineva, Tzonka; Jaouen, Frederic] Univ Montpellier, CNRS, ENSCM, ICGM, Montpellier, France; [Silvioli, Luca; Rossmeisl, Jan] Univ Copenhagen, Nanosci Ctr, Dept Chem, Copenhagen, Denmark; [Silvioli, Luca] Seaborg Technol, Copenhagen, Denmark; [Cullen, David A.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN USA; [Zitolo, Andrea] Synchrotron SOLEIL, BP 48, Gif Sur Yvette, France; [Teschner, Detre] Fritz Haber Inst Max Planck Gesell, Inorgan Chem Elect Struct Grp, Berlin, Germany; [Teschner, Detre] Max Planck Inst Chem Energy Convers, Dept Heterogeneous React, Berlin, Germany; [Wagner, Stephan; Kramm, Ulrike, I] Tech Univ Darmstadt, Grad Sch Excellence Energy Sci & Engn, Dept Chem, Darmstadt, Germany; [Wagner, Stephan; Kramm, Ulrike, I] Tech Univ Darmstadt, Grad Sch Excellence Energy Sci & Engn, Dept Mat & Earth Sci, Darmstadt, Germany",,"This contribution reports the discovery and analysis of ap-block Sn-based catalyst for the electroreduction of molecular oxygen in acidic conditions at fuel cell cathodes; the catalyst is free of platinum-group metals and contains single-metal-atom actives sites coordinated by nitrogen. The prepared SnNC catalysts meet and exceed state-of-the-art FeNC catalysts in terms of intrinsic catalytic turn-over frequency and hydrogen-air fuel cell power density. The SnNC-NH(3)catalysts displayed a 40-50% higher current density than FeNC-NH(3)at cell voltages below 0.7 V. Additional benefits include a highly favourable selectivity for the four-electron reduction pathway and a Fenton-inactive character of Sn. A range of analytical techniques combined with density functional theory calculations indicate that stannic Sn(iv)N(x)single-metal sites with moderate oxygen chemisorption properties and low pyridinic N coordination numbers act as catalytically active moieties. The superior proton-exchange membrane fuel cell performance of SnNC cathode catalysts under realistic, hydrogen-air fuel cell conditions, particularly after NH(3)activation treatment, makes them a promising alternative to today's state-of-the-art Fe-based catalysts. For oxygen reduction and hydrogen oxidation reactions, proton-exchange membrane fuel cells typically rely on precious-metal-based catalysts. Ap-block single-metal-site tin/nitrogen-doped carbon is shown to exhibit promising electrocatalytic and fuel cell performance.",,DENSITY-FUNCTIONAL THEORY; ACTIVE-SITES; FE/N/C CATALYSTS; ELECTROCATALYSTS; IRON; ELECTROREDUCTION; IDENTIFICATION; UNIVERSALITY; DEGRADATION; COMPLEXES,DENSITY-FUNCTIONAL THEORY;ACTIVE-SITES;FE/N/C CATALYSTS;ELECTROCATALYSTS;IRON;ELECTROREDUCTION;IDENTIFICATION;UNIVERSALITY;DEGRADATION;COMPLEXES,jan.rossmeisl@chem.ku.dk; frederic.jaouen@umontpellier.fr; pstrasser@tu-berlin.de,,"HEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY",,,,NATURE PORTFOLIO,1476-1122,,,32661387,English,NAT MATER,Article,WoS,Chemistry; Materials Science; Physics,WOS:000548166000002,,Germany;France;Denmark;United States,chem.ku.dk,Tech Univ Berlin;Univ Montpellier;Univ Copenhagen;Seaborg Technol;Oak Ridge Natl Lab;Synchrotron SOLEIL;Fritz Haber Inst Max Planck Gesell;Max Planck Inst Chem Energy Convers;Tech Univ Darmstadt,"Tech Univ Berlin, Germany;Univ Montpellier, France;Univ Copenhagen, Denmark;Seaborg Technol, Denmark;Oak Ridge Natl Lab, United States;Synchrotron SOLEIL, France;Fritz Haber Inst Max Planck Gesell, Germany;Max Planck Inst Chem Energy Convers, Germany;Tech Univ Darmstadt, Germany","Luo, Fang; Roy, Aaron; Silvioli, Luca; Cullen, David A.; Zitolo, Andrea; Sougrati, Moulay Tahar; Oguz, Ismail Can; Mineva, Tzonka; Teschner, Detre; Wagner, Stephan; Wen, Ju; Dionigi, Fabio; Kramm, Ulrike, I; Rossmeisl, Jan; Jaouen, Frederic; Strasser, Peter"
"Jin, Z., Chen, Y., Sun, J., Zhang, S., Zhang, J.",Perceptions of metal-nitrogen-carbon catalysts for oxygen reduction reaction,2025,Materials Science and Engineering R: Reports,165,,101027,,,,7,10.1016/j.mser.2025.101027,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105006751709&doi=10.1016%2Fj.mser.2025.101027&partnerID=40&md5=91369823dc45d1b31460a5264f386837,"Institute for Sustainable Energy, Shanghai University College of Sciences, Shanghai, China","Jin, Zeyu, Institute for Sustainable Energy, Shanghai University College of Sciences, Shanghai, China; Chen, Yizhe, Institute for Sustainable Energy, Shanghai University College of Sciences, Shanghai, China; Sun, Jialin, Institute for Sustainable Energy, Shanghai University College of Sciences, Shanghai, China; Zhang, Shiming, Institute for Sustainable Energy, Shanghai University College of Sciences, Shanghai, China; Zhang, Jiujun, Institute for Sustainable Energy, Shanghai University College of Sciences, Shanghai, China","Non-noble metal-nitrogen-carbon (M-N-C) catalysts are promising alternatives to precious platinum (Pt) group metals-based catalysts for oxygen reduction reactions (ORR). However, their practical applications toward proton exchange membrane fuel cells and metal-air batteries remain challenging because of the insufficient electrocatalytic activity and stability. In this review, a comprehensive perception of M-N-C catalysts has been summarized in terms of the electrocatalytic fundamentals (ORR mechanisms and degradation mechanisms), identification of active sites (metal-nanoparticle, metal-atom, and non-metal), design of regulation strategies (improving intrinsic activity of active sites, increasing site density, and enhancing fundamental properties of carbon-based materials), and advanced characterization techniques (in-situ and operando) for understanding of the structure-performance relationship. Particularly, this review highlights the innovative strategies for the improvement of intrinsic activity through optimizing the catalysts’ coordination numbers, coordination shell, and peripheral environment. Also, for obtaining in-depth insight into M-N-C catalysts, the potential challenges and possible perspectives are presented. This review aims to providing a valuable guideline for efficient and stable non-noble metal carbon catalysts. © 2025 Elsevier B.V.",Active sites; Advanced characterization techniques; Electrocatalytic fundamentals; Metal-nitrogen-carbon; Oxygen reduction reaction; Regulation strategies,Palladium; Platinum; Active site; Advanced characterization technique; Carbon catalysts; Characterization techniques; Electrocatalytic; Electrocatalytic fundamental; Metal-nitrogen-carbon; Nitrogen-carbon; Oxygen reduction reaction; Regulation strategy; Electrolytic reduction,Active sites;Advanced characterization techniques;Electrocatalytic fundamentals;Metal-nitrogen-carbon;Oxygen reduction reaction;Regulation strategies;Palladium;Platinum;Active site;Advanced characterization technique;Carbon catalysts;Characterization techniques;Electrocatalytic;Electrocatalytic fundamental;Nitrogen-carbon;Regulation strategy;Electrolytic reduction,"S. Zhang; Institute for Sustainable Energy/College of Sciences, Shanghai University, Shanghai, 200444, China; email: smzhang@shu.edu.cn",,,,,,Elsevier Ltd,0927796X,,MIGIE,,English,Mater Sci Eng R Rep,Review,Scopus,,2-s2.0-105006751709,,China,shu.edu.cn,,,"Jin, Z.; Chen, Y.; Sun, J.; Zhang, S.; Zhang, J."
"Xie, X.H., He, C., Li, B.Y., He, Y.H., Cullen, D.A., Wegener, E.C., Kropf, A.J., Martinez, U., Cheng, Y.W., Engelhard, M.H., Bowden, M.E., Song, M., Lemmon, T., Li, X.S., Nie, Z.M., Liu, J., Myers, D.J., Zelenay, P., Wang, G.F., Wu, G., Ramani, V., Shao, Y.Y.",Performance enhancement and degradation mechanism identification of a single-atom Co-N-C catalyst for proton exchange membrane fuel cells,2020,NATURE CATALYSIS,3,12,,1044,1054,11,659,10.1038/s41929-020-00546-1,,"[Xie, Xiaohong; Lemmon, Teresa; Li, Xiaohong S.; Nie, Zimin; Liu, Jian; Shao, Yuyan] Pacific Northwest Natl Lab, Energy & Environm Directorate, Richland, WA 99352 USA; [He, Cheng; Ramani, Vijay] Washington Univ, Ctr Solar Energy & Energy Storage, St Louis, MO 63110 USA; [He, Cheng; Ramani, Vijay] Washington Univ, Dept Energy Environm & Chem Engn, St Louis, MO 63110 USA; [Li, Boyang; Wang, Guofeng] Univ Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA USA; [He, Yanghua; Wu, Gang] State Univ New York Univ Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA; [Cullen, David A.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN USA; [Wegener, Evan C.; Kropf, A. Jeremy; Myers, Deborah J.] Argonne Natl Lab, Chem Sci & Engn Div, Lemont, IL USA; [Martinez, Ulises; Zelenay, Piotr] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM USA; [Cheng, Yingwen] Northern Illinois Univ, Dept Chem & Biochem, De Kalb, IL 60115 USA; [Engelhard, Mark H.; Bowden, Mark E.] Pacific Northwest Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA; [Song, Miao] Pacific Northwest Natl Lab, Phys & Computat Sci Directorate, Richland, WA 99352 USA",,"The development of catalysts free of platinum-group metals and with both a high activity and durability for the oxygen reduction reaction in proton exchange membrane fuel cells is a grand challenge. Here we report an atomically dispersed Co and N co-doped carbon (Co-N-C) catalyst with a high catalytic oxygen reduction reaction activity comparable to that of a similarly synthesized Fe-N-C catalyst but with a four-time enhanced durability. The Co-N-C catalyst achieved a current density of 0.022 A cm(-2) at 0.9 ViR-free (internal resistance-compensated voltage) and peak power density of 0.64 W cm(-2) in 1.0 bar H-2/O-2 fuel cells, higher than that of non-iron platinum-group-metal-free catalysts reported in the literature. Importantly, we identified two main degradation mechanisms for metal (M)-N-C catalysts: catalyst oxidation by radicals and active-site demetallation. The enhanced durability of Co-N-C relative to Fe-N-C is attributed to the lower activity of Co ions for Fenton reactions that produce radicals from the main oxygen reduction reaction by-product, H2O2, and the significantly enhanced resistance to demetallation of Co-N-C.",,OXYGEN REDUCTION REACTION; NITROGEN-CARBON CATALYSTS; IRON-BASED CATALYSTS; ACTIVE-SITES; CATHODE CATALYSTS; FE/N/C-CATALYSTS; ELECTROCATALYST; STABILITY; PEROXIDE; ELECTROREDUCTION,OXYGEN REDUCTION REACTION;NITROGEN-CARBON CATALYSTS;IRON-BASED CATALYSTS;ACTIVE-SITES;CATHODE CATALYSTS;FE/N/C-CATALYSTS;ELECTROCATALYST;STABILITY;PEROXIDE;ELECTROREDUCTION,gangwu@buffalo.edu; ramani@wustl.edu; yuyan.shao@pnnl.gov,,"HEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY",,,,NATURE PORTFOLIO,2520-1158,,,,English,NAT CATAL,Article,WoS,Chemistry,WOS:000594808400003,2-s2.0-85096904155,United States,buffalo.edu,Pacific Northwest Natl Lab;Washington Univ;Univ Pittsburgh;State Univ New York Univ Buffalo;Oak Ridge Natl Lab;Argonne Natl Lab;Los Alamos Natl Lab;Northern Illinois Univ,"Pacific Northwest Natl Lab, United States;Washington Univ, United States;Univ Pittsburgh, United States;State Univ New York Univ Buffalo, United States;Oak Ridge Natl Lab, United States;Argonne Natl Lab, United States;Los Alamos Natl Lab, United States;Northern Illinois Univ, United States","Xie, Xiaohong; He, Cheng; Li, Boyang; He, Yanghua; Cullen, David A.; Wegener, Evan C.; Kropf, A. Jeremy; Martinez, Ulises; Cheng, Yingwen; Engelhard, Mark H.; Bowden, Mark E.; Song, Miao; Lemmon, Teresa; Li, Xiaohong S.; Nie, Zimin; Liu, Jian; Myers, Deborah J.; Zelenay, Piotr; Wang, Guofeng; Wu, Gang; Ramani, Vijay; Shao, Yuyan"
"Osmieri, L., Escudero-Cid, R., Monteverde, A.H.A., Ocon, P., Specchia, S.",Performance of a Fe-N-C catalyst for the oxygen reduction reaction in direct methanol fuel cell: Cathode formulation optimization and short-term durability,2017,Applied Catalysis B: Environmental,201,,,253,265,,165,10.1016/j.apcatb.2016.08.043,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84983422722&doi=10.1016%2Fj.apcatb.2016.08.043&partnerID=40&md5=496af5766f86022c5a71c157b39cbc9f,"Department of Applied Science and Technology, Politecnico di Torino, Turin, TO, Italy; Departamento de Química Física Aplicada, Universidad Autónoma de Madrid, Madrid, Madrid, Spain","Osmieri, Luigi, Department of Applied Science and Technology, Politecnico di Torino, Turin, TO, Italy, Departamento de Química Física Aplicada, Universidad Autónoma de Madrid, Madrid, Madrid, Spain; Escudero-Cid, Ricardo, Departamento de Química Física Aplicada, Universidad Autónoma de Madrid, Madrid, Madrid, Spain; Monteverde, Alessandro Hugo Antonio, Department of Applied Science and Technology, Politecnico di Torino, Turin, TO, Italy; Ocõn, Pilar, Departamento de Química Física Aplicada, Universidad Autónoma de Madrid, Madrid, Madrid, Spain; Specchia, Stefania, Department of Applied Science and Technology, Politecnico di Torino, Turin, TO, Italy","A non-noble metal (NNM) catalyst for oxygen reduction reaction (ORR) was synthesized using Fe(II)-phthalocyanine as unique source of Fe, N, and C, and SBA-15 ordered mesoporous silica as templating agent, resulting in a material with an extremely high specific surface area and a high microporosity (around 50%). FESEM, FTIR and Raman analyses were performed to investigate the morphology and the physicochemical properties of the catalyst. The ORR activity and the methanol tolerance were tested in rotating disk electrode (RDE), and the selectivity towards a complete 4-electrons reduction was investigated by rotating ring disk electrode (RRDE) test and hydrogen peroxide reduction test in RDE, showing very promising results. Thus, the Fe-N-C catalyst was tested at the cathode of a DMFC after determination of the optimal electrode formulation regarding catalyst loading and Nafion® content, showing a maximum power density of 20 mW cm−2 at 90 °C. A short term durability test to assess the behavior of both the Fe-N-C and the Pt/C catalysts was conducted on the DMFC, showing a better performance of the non-noble catalyst. Thus, the Fe-N-C catalyst is a potential good candidate to be used as catalytic material for DMFC cathode, in alternative to Pt. The performance in a H<inf>2</inf>/O<inf>2</inf> PEMFC was tested as well, showing a power density of 105 mW cm−2 at 60 °C. © 2016 Elsevier B.V.",Direct methanol fuel cell; Iron-phthalocyanine; Non-noble metal catalyst; Oxygen reduction reaction; Rotating ring-disk electrode,Catalyst activity; Catalysts; Cathodes; Durability; Electrodes; Electrolytic reduction; Fuel cells; Mesoporous materials; Methanol; Methanol fuels; Nitrogen compounds; Oxygen; Platinum; Precious metals; Proton exchange membrane fuel cells (PEMFC); Rotating disks; Formulation optimization; High specific surface area; Hydrogen peroxide reduction; Iron phthalocyanines; Non-noble metal catalysts; Ordered mesoporous silicas; Oxygen reduction reaction; Rotating ring-disk electrode; Direct methanol fuel cells (DMFC),Direct methanol fuel cell;Iron-phthalocyanine;Non-noble metal catalyst;Oxygen reduction reaction;Rotating ring-disk electrode;Catalyst activity;Catalysts;Cathodes;Durability;Electrodes;Electrolytic reduction;Fuel cells;Mesoporous materials;Methanol;Methanol fuels;Nitrogen compounds;Oxygen;Platinum;Precious metals;Proton exchange membrane fuel cells (PEMFC);Rotating disks;Formulation optimization;High specific surface area;Hydrogen peroxide reduction;Iron phthalocyanines;Non-noble metal catalysts;Ordered mesoporous silicas;Direct methanol fuel cells (DMFC),"L. Osmieri; Politecnico di Torino, Department of Applied Science and Technology, Torino, Corso Duca degli Abruzzi 24, 10129, Italy; email: luigi.osmieri@polito.it",,,,,,Elsevier B.V.,09263373,,ACBEE,,English,Appl. Catal. B Environ.,Article,Scopus,,2-s2.0-84983422722,,Italy;Spain,polito.it,,,"Osmieri, L.; Escudero-Cid, R.; Monteverde, A.H.A.; Ocon, P.; Specchia, S."
"Bampos, G., Bebelis, S.",Performance of a Pd-Zn Cathode Electrode in a H2 Fueled Single PEM Fuel Cell,2022,ELECTRONICS,11,17,2776,,,19,4,10.3390/electronics11172776,,"[Bampos, Georgios; Bebelis, Symeon] Univ Patras, Dept Chem Engn, Caratheodory 1,Univ Campus, GR-26504 Patras, Greece",,"A 21.7 wt.% Pd-7.3 wt.% Zn/C electrocatalyst prepared via the wet impregnation (w.i.) method was deposited onto commercial carbon cloth (E-TEK) and tested towards its electrocatalytic performance as a cathode electrode material for oxygen reduction reaction (ORR) in a H-2 fueled single proton-exchange membrane fuel cell (PEMFC). A commercial PtRu electrode (E-TEK) was used as PEM anode for hydrogen oxidation reaction (HOR). The performance of the aforementioned PEMFC was compared with that of the same PEMFC with two different Pt-based cathodes, which were prepared by deposition onto commercial carbon cloth (E-TEK) of 29 wt.% Pt/C synthesized via w.i. and of commercial 29 wt.% Pt/C (TKK). The metal loading of the tested cathode electrodes was 0.5 mg met cm(-2). Comparison was based both on polarization curves and on electrochemical impedance spectroscopy (EIS) measurements at varying cell potential. In terms of power density, the lowest and highest performance was exhibited by the PEMFC with the 21.7 wt% Pd-7.3 wt.% Zn/C cathode and the PEMFC with the commercial 29 wt.% Pt/C (TKK) cathode electrode, respectively. This behavior was in accordance with the results of EIS measurements, which showed that the PEMFC with the 21.7 wt.% Pd-7.3 wt.% Zn/C cathode exhibited the highest polarization resistance.",proton exchange membrane fuel cells; PEMFC; H-2-fueled; fuel cell electrodes; cathode electrodes; Pd-based electrocatalysts; Pt-based electrocatalysts; ORR electrocatalysts; bimetallic electrodes; electrochemical impedance spectroscopy (EIS),FE-N-C; OXYGEN REDUCTION REACTION; BIMETALLIC ELECTROCATALYSTS; ALLOY ELECTROCATALYSTS; ACTIVE-SITES; HYDROGEN; STRAIN; NANOPARTICLES; ADSORPTION; CATALYSTS,proton exchange membrane fuel cells;PEMFC;H-2-fueled;fuel cell electrodes;cathode electrodes;Pd-based electrocatalysts;Pt-based electrocatalysts;ORR electrocatalysts;bimetallic electrodes;electrochemical impedance spectroscopy (EIS);FE-N-C;OXYGEN REDUCTION REACTION;BIMETALLIC ELECTROCATALYSTS;ALLOY ELECTROCATALYSTS;ACTIVE-SITES;HYDROGEN;STRAIN;NANOPARTICLES;ADSORPTION;CATALYSTS,simeon@chemeng.upatras.gr,,"MDPI AG, Grosspeteranlage 5, CH-4052 BASEL, SWITZERLAND",,,,MDPI,2079-9292,,,,English,ELECTRONICS-SWITZ,Article,WoS,Computer Science; Engineering; Physics,WOS:000852580700001,,Greece,chemeng.upatras.gr,Univ Patras,"Univ Patras, Greece","Bampos, Georgios; Bebelis, Symeon"
"Abd Lah Halim, F., Tsujiguchi, T., Osaka, Y., Kodama, A.",Performance of direct formic acid fuel cell using transition metal-nitrogen-doped carbon nanotubes as cathode catalysts,2019,International Journal of Energy Research,43,14,,8070,8084,,14,10.1002/er.4802,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85071336901&doi=10.1002%2Fer.4802&partnerID=40&md5=a78cda76346dea99eefcb99b957b386b,"Division of Mechanical Science and Engineering, Kanazawa University, Kanazawa, Ishikawa, Japan; Faculty of Mechanical Engineering, Kanazawa University, Kanazawa, Ishikawa, Japan","Abd Lah Halim, Fahimah, Division of Mechanical Science and Engineering, Kanazawa University, Kanazawa, Ishikawa, Japan; Tsujiguchi, Takuya, Faculty of Mechanical Engineering, Kanazawa University, Kanazawa, Ishikawa, Japan; Osaka, Yugo, Faculty of Mechanical Engineering, Kanazawa University, Kanazawa, Ishikawa, Japan; Kodama, Akio, Faculty of Mechanical Engineering, Kanazawa University, Kanazawa, Ishikawa, Japan","The application of nonprecious metal catalysts, such as iron (Fe) and cobalt (Co) catalyst, to direct liquid fuel cells (DLFCs), especially in direct methanol fuel cells, has been widely investigated. However, the application of such non‐Pt catalysts as cathode catalysts in direct formic acid fuel cell (DFAFC) operations has not yet been investigated. This study intends to evaluate the formic acid tolerance of such catalysts in case of oxygen reduction reaction. In addition, we investigate their performances in DFAFC using the Fe‐ and Co‐nitrogen‐doped carbon nanotubes (Fe‐NCNT and Co‐NCNT) as the cathode catalysts and compare these performances with the commercial Pt/C catalyst. Herein, Fe‐NCNT and Co‐NCNT were synthesized using the conventional method by the pyrolysis of the multiwalled carbon nanotubes, dicyandiamide, and metal salt under the flow of N2 at 800°C. Both the Fe‐NCNT and Co‐NCNT catalysts exhibit higher formic acid tolerance when compared with that exhibited by the Pt/C catalyst. Further, single‐cell tests with hydrogen‐fed polymer electrolyte fuel cell (PEFC) and DFAFC operations were conducted under various operating conditions to compare the performances of the cells while using the prepared catalysts and the conventional Pt/C catalyst. The PEFC performances in both the Fe‐NCNT and Co‐NCNT catalysts were significantly low (94.9mW cm−2 for Fe‐NCNT and 164.0 mW cm−2 for Co‐NCNT at 60°C). Regardless, the Co‐NCNT catalyst exhibited a maximum power density of 160.7 mW cm−2 in DFAFC operated at 60°C and7‐M formic acid. This value is comparable with that for DFAFC with a Pt/C catalyst (128.9mW cm−2) and is considerably higher than that obtained for other DLFCs while using a non‐Pt catalyst. Therefore, the usage of a non‐Pt metal catalyst as the cathode catalyst is preferable in case of DFAFC. © 2019 John Wiley & Sons, Ltd.",DFAFC; formic acid tolerance; nonprecious metal catalyst; oxygen reduction reaction,Catalyst supports; Cathodes; Direct methanol fuel cells (DMFC); Doping (additives); Electrolytic reduction; Formic acid; Methanol fuels; Multiwalled carbon nanotubes (MWCN); Nanocatalysts; Nanotubes; Nitrogen; Platinum metals; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Transition metals; Acid tolerance; DFAFC; Direct formic acid fuel cells; Maximum power density; Nitrogen doped carbon nanotubes; Non-precious metal catalysts; Oxygen reduction reaction; Polymer electrolyte fuel cells; Formic acid fuel cells (FAFC),DFAFC;formic acid tolerance;nonprecious metal catalyst;oxygen reduction reaction;Catalyst supports;Cathodes;Direct methanol fuel cells (DMFC);Doping (additives);Electrolytic reduction;Formic acid;Methanol fuels;Multiwalled carbon nanotubes (MWCN);Nanocatalysts;Nanotubes;Nitrogen;Platinum metals;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Transition metals;Acid tolerance;Direct formic acid fuel cells;Maximum power density;Nitrogen doped carbon nanotubes;Non-precious metal catalysts;Polymer electrolyte fuel cells;Formic acid fuel cells (FAFC),"T. Tsujiguchi; Faculty of Mechanical Engineering, Institute of Science and Engineering, Kanazawa University, Kanazawa, Japan; email: tsujiguchi@se.kanazawa-u.ac.jp",,,,,,"John Wiley and Sons Ltd vgorayska@wiley.com Southern Gate Chichester, West Sussex PO19 8SQ",0363907X,,IJERD,,English,Int. J. Energy Res.,Article,Scopus,,2-s2.0-85071336901,,Japan,se.kanazawa-u.ac.jp,,,"Abd Lah Halim, F.; Tsujiguchi, T.; Osaka, Y.; Kodama, A."
"Rohendi, D., Majlan, E.H., Yulianti, D.H., Juwita, Syarif, N., Rachmat, A., Sumboja, A., Nyimas, F.S., Amelia, I.",PERFORMANCE OF MEMBRANE ELECTRODE ASSEMBLY USING Pt/C AND CoFe/N-C CATALYSTS IN PROTON EXCHANGE MEMBRANE FUEL CELLS; Prestasi Pemasangan Elektrod Membran Menggunakan Pemangkin Pt/C dan CoFe/N-C dalam Sel Bahan Api Membran Pertukaran Proton,2024,Malaysian Journal of Analytical Sciences,28,2,,388,396,,2,,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85193000947&partnerID=40&md5=9ae7bcea6c56f4a1aae345aadb7c72ad,"Department of Chemistry, Universitas Sriwijaya, Indralaya, South Sumatra, Indonesia; Universitas Sriwijaya, Indralaya, South Sumatra, Indonesia; Chemistry Program, Universitas Indo Global Mandiri, Palembang, South Sumatra, Indonesia; Institut Teknologi Bandung, Bandung, West Java, Indonesia; Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia","Rohendi, Dedi, Department of Chemistry, Universitas Sriwijaya, Indralaya, South Sumatra, Indonesia, Universitas Sriwijaya, Indralaya, South Sumatra, Indonesia; Majlan, E. H., Institut Teknologi Bandung, Bandung, West Java, Indonesia; Yulianti, Dwi Hawa, Universitas Sriwijaya, Indralaya, South Sumatra, Indonesia; Juwita, null, Department of Chemistry, Universitas Sriwijaya, Indralaya, South Sumatra, Indonesia; Syarif, Nirwan, Department of Chemistry, Universitas Sriwijaya, Indralaya, South Sumatra, Indonesia, Universitas Sriwijaya, Indralaya, South Sumatra, Indonesia; Rachmat, Addy, Department of Chemistry, Universitas Sriwijaya, Indralaya, South Sumatra, Indonesia, Universitas Sriwijaya, Indralaya, South Sumatra, Indonesia; Sumboja, Afriyanti, Chemistry Program, Universitas Indo Global Mandiri, Palembang, South Sumatra, Indonesia; Nyimas, Febrika S., Universitas Sriwijaya, Indralaya, South Sumatra, Indonesia; Amelia, Icha, Universitas Sriwijaya, Indralaya, South Sumatra, Indonesia, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia","The performance of membrane electrode assembly (MEA) hinders fuel cell commercialisation. MEA is greatly affected by humidification, temperature and hydrogen flow rate. In this study, the effects of operating conditions on MEA were determined using Pt/C and CoFe/N-C catalysts in proton exchange membrane fuel cells. Herein, two types of MEAs using the Nafion-212 membrane were prepared and tested. The anode and cathode of the first MEA were coated with Pt/C and CoFe/N-C catalysts, respectively, whereas the second MEA utilised a Pt/C catalyst on both electrodes. The electrode with Pt/C and CoFe/N-C catalysts was characterised using cyclic voltammetry and electrochemical impedance spectroscopy to obtain the electrochemical surface area (ECSA) and electrical conductivity of the electrode, respectively. The performance of two MEAs was tested under different operating conditions, such as various humidifier temperatures (40 °C, 60 °C, 80 °C and 100 °C) and hydrogen flow rates (100, 200, 300 and 400 mL/min). The electrode with a Pt/C catalyst exhibited higher ECSA (0.245 m2/g) than the CoFe/N-C electrode (0.018 m2/g). Similarly, the Pt/C electrode possessed higher conductivity (7.2 × 10−3 S/cm) than the CoFe/N-C electrode (4.4 × 10−3 S/cm). Consequently, the open-circuit voltage (OCV) of the second MEA with a Pt/C catalyst on both electrodes showed a higher value (0.890 V) than the OCV of the first MEA (0.790 V). Furthermore, the humidifier temperature was optimum at 80 °C, and it achieved power density levels as high as 10.14 and 3.43 mW/cm2 for the second and the first MEA, respectively. In addition, the performance of MEA was affected by the hydrogen flow rate. At the optimum hydrogen flow rate of 400 mL/min for the first MEA, a power density of 4.93 mW/cm2 was achieved. Meanwhile, the second MEA required a lower hydrogen flow rate (200 mL/min) to achieve a maximum power density of 10.14 mW/cm2. © 2024, Malaysian Society of Analytical Sciences. All rights reserved.",Co-Fe/N-C; humidification temperature; hydrogen flow rate; MEA performance; proton exchange membrane fuel cells,,Co-Fe/N-C;humidification temperature;hydrogen flow rate;MEA performance;proton exchange membrane fuel cells,"E.H. Majlan; Materials Science and Engineering Research Group Institut Teknologi Bandung, Faculty of Mechanical and Aerospace Engineering, Bandung, Jl. Ganesha 10, Indonesia; email: edyhm71@gmail.com",,,,,,Malaysian Society of Analytical Sciences,13942506,,,,English,Malays. J. Anal. Sci.,Article,Scopus,,2-s2.0-85193000947,,Indonesia;Malaysia,gmail.com,,,"Rohendi, D.; Majlan, E.H.; Yulianti, D.H.; Juwita; Syarif, N.; Rachmat, A.; Sumboja, A.; Nyimas, F.S.; Amelia, I."
"Krishnan, S.R., Verstraete, D., Aguey-Zinsou, F.",Performance of Non-Precious Metal Electrocatalysts in Proton-Exchange Membrane Fuel Cells: A Review,2024,CHEMELECTROCHEM,11,17,,,,21,15,10.1002/celc.202400299,,"[Krishnan, Srivarshini Rukmani; Aguey-Zinsou, Francois] Univ Sydney, Sch Chem, MERLin, Sydney, NSW 2006, Australia; [Verstraete, Dries] Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia",,"Polymer electrolyte membrane fuel cells (PEMFCs) are an important enabler of the nascent hydrogen economy. However, due to the reliance on precious metal catalysts like platinum, reducing the cost and broad penetration of PEMFCs beyond vehicle application remains a challenge. In this respect, alternative non-precious metal catalysts and other carbon-based catalysts remain the holy grail toward advanced low-cost PEMFC. This review summarizes recent progress along the development of non-precious catalysts and their performance under PEMFC operation. Critical factors such as the activity, stability, and durability of non-precious metal catalysts and their associated mechanisms including the paths leading to degradation are discussed. Ultimately, the review concludes by highlighting the impressive activity and potential of NPM catalysts and the areas of focus to enable the translation of non-precious catalysts to commercially viable PEMFC systems. This review explores high-performing non-precious metal catalysts for proton exchange membrane fuel cells, aiming to understand the factors influencing their performance and degradation. It involves their synthesis methods, potential active sites, characterization, and membrane electrode assembly fabrication. Additionally, the review provides a detailed insight into the plausible mechanistic pathways governing their activity and degradation. image",PEMFC; Non-precious metal catalysts; Mechanism; Degradation,OXYGEN REDUCTION REACTION; FE-N-C; NITROGEN-DOPED CARBON; ROTATING-DISC ELECTRODE; HYDROGEN OXIDATION; ACTIVE-SITES; CATALYST LAYER; SURFACE-AREA; TUNGSTEN-CARBIDE; PLATINUM ELECTROCATALYSTS,PEMFC;Non-precious metal catalysts;Mechanism;Degradation;OXYGEN REDUCTION REACTION;FE-N-C;NITROGEN-DOPED CARBON;ROTATING-DISC ELECTRODE;HYDROGEN OXIDATION;ACTIVE-SITES;CATALYST LAYER;SURFACE-AREA;TUNGSTEN-CARBIDE;PLATINUM ELECTROCATALYSTS,f.aguey@sydney.edu.au,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,2196-0216,,,,English,CHEMELECTROCHEM,Review,WoS,Electrochemistry,WOS:001289549100001,2-s2.0-85201062089,Australia,sydney.edu.au,Univ Sydney,"Univ Sydney, Australia","Krishnan, Srivarshini Rukmani; Verstraete, Dries; Aguey-Zinsou, Francois"
"Ahluwalia, R.K., Wang, X., Osmieri, L., Peng, J.K., Chung, H.T., Neyerlin, K.C.",Performance of polymer electrolyte fuel cell electrodes with atomically dispersed (AD) Fe-C-N Orr catalyst,2019,Journal of the Electrochemical Society,166,14,,F1096,F1104,,20,10.1149/2.0851914jes,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85074095976&doi=10.1149%2F2.0851914jes&partnerID=40&md5=814ea3bfa47b5e208034ed3856a743c3,"Argonne National Laboratory, Lemont, IL, United States; National Renewable Laboratory, Golden, CO, United States; Los Alamos National Laboratory, Los Alamos, NM, United States","Ahluwalia, Rajesh K., Argonne National Laboratory, Lemont, IL, United States; Wang, Xiaohua, Argonne National Laboratory, Lemont, IL, United States; Osmieri, Luigi, National Renewable Laboratory, Golden, CO, United States; Peng, Juikun, Argonne National Laboratory, Lemont, IL, United States; Chung, Hoon Taek, Los Alamos National Laboratory, Los Alamos, NM, United States; Neyerlin, Kenneth C., National Renewable Laboratory, Golden, CO, United States","Activity of (AD)Fe-N-C catalyst with low Fe content is investigated in differential cells prepared by hot pressing anode gas diffusion electrodes (0.2 mg<inf>Pt</inf>/cm2) to N211 membrane and brush painting the cathode catalyst ink. Polarization curves obtained in H<inf>2</inf>/O<inf>2</inf> show double Tafel slopes which, in conjunction with the redox potential observed in cyclic voltammetry traces, forms the basis for a distributed ORR (oxygen reduction reaction) kinetic model with potential-dependent available sites. Application of this model to polarization data in H<inf>2</inf>/air provides the basis for formulating an oxygen transport model and leads to 7.7 ± 0.6 mA/cm2 catalyst activity at 0.9 V, 31.5–34.3 mA/cm2 cell performance at 0.8 V, and 0.8-2 s/cm O<inf>2</inf> transport resistance. A coupled kinetic, O<inf>2</inf> transport and proton transport illustrates the projected improvements needed in catalyst activity and electrode structure to approach the automotive target of 1000 mW/cm2 stack power density while meeting the 1.45 kW/°C heat rejection constraint at 1.5 cathode stoichiometry. The model indicates that we need twelve-fold higher mass activity for reducing the kinetic losses, doubling of active site density and an engineered electrode structure for 50% lower proton transport resistance, as well as a 50% reduction in electrode thickness to limit the O<inf>2</inf> transport losses. © 2019 The Electrochemical Society.",,Cathodes; Cyclic voltammetry; Diffusion in gases; Electrolytic reduction; Hot pressing; Iron compounds; Kinetics; Oxygen; Polarization; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Redox reactions; Active site density; Electrode thickness; Oxygen reduction reaction; Polarization curves; Polymer electrolyte fuel cells; Potential-dependent; Proton transport resistance; Transport resistance; Catalyst activity,Cathodes;Cyclic voltammetry;Diffusion in gases;Electrolytic reduction;Hot pressing;Iron compounds;Kinetics;Oxygen;Polarization;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Redox reactions;Active site density;Electrode thickness;Oxygen reduction reaction;Polarization curves;Polymer electrolyte fuel cells;Potential-dependent;Proton transport resistance;Transport resistance;Catalyst activity,"R.K. Ahluwalia; Argonne National Laboratory, Argonne, 60439, United States; email: walia@anl.gov",,,,,,Electrochemical Society Inc. Beth.Craanen@electrochem.org,00134651,,JESOA,,English,J Electrochem Soc,Article,Scopus,,2-s2.0-85074095976,,United States,anl.gov,,,"Ahluwalia, R.K.; Wang, X.; Osmieri, L.; Peng, J.-K.; Chung, H.T.; Neyerlin, K.C."
"Chen, Y.H., Lan, L.H., Li, J., Fu, Q., Zhang, L., Zhu, X., Liao, Q.",Performance properties of A Membrane-free Direct Formate Fuel Cell With a Non-Precious Metal Cathode,2019,Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics,40,6,,1403,1407,,0,,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85071775558&partnerID=40&md5=a2f13864e02ec8556fbe05571f817a90,"Chongqing University, Chongqing, China; Chongqing University, Chongqing, China","Chen, Yuhan, Chongqing University, Chongqing, China, Chongqing University, Chongqing, China; Lan, Linghan, Chongqing University, Chongqing, China, Chongqing University, Chongqing, China; Li, Jun, Chongqing University, Chongqing, China, Chongqing University, Chongqing, China; Fu, Qian, Chongqing University, Chongqing, China, Chongqing University, Chongqing, China; Zhang, Liang, Chongqing University, Chongqing, China, Chongqing University, Chongqing, China; Zhu, Xun, Chongqing University, Chongqing, China, Chongqing University, Chongqing, China; Liao, Qiang, Chongqing University, Chongqing, China, Chongqing University, Chongqing, China","In this paper, a non-precious metal catalyst with high oxygen reduction reaction (ORR) activity supported on Vulcan XC72 carbon black was synthesized. Based on the catalyst, we fabricated a tubular cathode for a membrane-free direct formate fuel cell (DFFC). The results show that the DFFC eliminated the expensive proton exchange membranes and simplified the preparation process and thus reduced the fabrication costs. This study also investigated the effect of operating conditions, such as the anolyte flow rate, the fuel concentration, and the supporting electrolyte concentration on the performance of the DFFC. The results show that when the flow rate was 0.7 mL•min-1 and the anolyte was 1.0 mol/L HCOONa+4.0 mol/L KOH, the DFFC showed a maximum power density of 1.91 mW•cm-3, which is 5% higher than the same DFFC based on the cathode with the commercial platinum catalyst. © 2019, Science Press. All right reserved.",Direct formate fuel cells; Membrane-free; Non-precious metal cathode; ORR,Carbon black; Catalysts; Cathodes; Electrolytes; Electrolytic reduction; Potassium hydroxide; Precious metals; Direct formate fuel cells; Maximum power density; Membrane-free; Non-precious metal catalysts; Non-precious metals; Performance properties; Proton exchange membranes; Supporting electrolyte; Proton exchange membrane fuel cells (PEMFC),Direct formate fuel cells;Membrane-free;Non-precious metal cathode;ORR;Carbon black;Catalysts;Cathodes;Electrolytes;Electrolytic reduction;Potassium hydroxide;Precious metals;Maximum power density;Non-precious metal catalysts;Non-precious metals;Performance properties;Proton exchange membranes;Supporting electrolyte;Proton exchange membrane fuel cells (PEMFC),"J. Li; Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing, 400030, China; email: lijun@cqu.edu.cn",,,,,,Science Press yanmh@neigae.ac.cn,0253231X,,KCJPD,,Chinese,Kung Cheng Je Wu Li Hsueh Pao,Article,Scopus,,2-s2.0-85071775558,,China,cqu.edu.cn,,,"Chen, Y.-H.; Lan, L.-H.; Li, J.; Fu, Q.; Zhang, L.; Zhu, X.; Liao, Q."
"Zago, S., Scarpetta-Pizo, L.C., Zagal, J.H., Specchia, S.",PGM-Free Biomass-Derived Electrocatalysts for Oxygen Reduction in Energy Conversion Devices: Promising Materials,2024,ELECTROCHEMICAL ENERGY REVIEWS,7,1,1,,,52,64,10.1007/s41918-023-00197-3,,"[Zago, Stefano; Specchia, Stefania] Politecn Torino, Dept Appl Sci & Technol, Corso Duca Abruzzi 24, I-10129 Turin, Italy; [Scarpetta-Pizo, Laura C.; Zagal, Jose H.] Univ Santiago Chile, Dept Quim Mat, Lab Electrocatalisis & Elect Mol, Ada Bernardo Ohiggins 3363, Santiago 9170022, Chile",,"Biomass is a low-cost, abundant and renewable resource that can be used to manufacture porous carbon-based materials for a variety of applications. Different mesoporous carbon supports can be obtained from the various synthetic approaches that are aimed at increasing the specific surface area and functionalization. Currently, most of the biomass is used for energy recovery. The circular economy approach could lead to the development of cheap and sustainable materials, and turning of wastes into a precious resource. In this review, we provide the recent advances in the field of electrochemistry for porous carbon materials derived from biomass, which offers wider applications in proton exchange membrane fuel cells (PEMFCs), anion exchange membrane fuel cells (AEMFCs) and Zn-air batteries (ZABs). The focus is on understanding the required properties of the materials and the role of synthetic pathways in platinum group metal (PGM) free electrocatalysts. The most promising materials are evaluated towards the oxygen reduction reaction (ORR) in PEMFC, AEMFC, and ZAB. The results achieved showed that the expected performances on these energy conversion devices still lack for deployment in practice, especially if compared with commercially available PGM-free electrocatalysts. This review article provides insights on how to improve the actual electrocatalytic activity of biomass-derived materials.",Mesoporous carbons; Fe-N-C electrocatalysts; Oxygen reduction reaction; Proton exchange membrane fuel cells; Anion exchange membrane fuel cells; Zinc-air batteries; Circular economy,NITROGEN-DOPED CARBON; N-C CATALYSTS; METAL-FREE ELECTROCATALYSTS; FUEL-CELL; POROUS CARBON; ACTIVE-SITES; EFFICIENT ELECTROCATALYSTS; ALLOY ELECTROCATALYSTS; BACTERIAL CELLULOSE; CATHODE CATALYSTS,Mesoporous carbons;Fe-N-C electrocatalysts;Oxygen reduction reaction;Proton exchange membrane fuel cells;Anion exchange membrane fuel cells;Zinc-air batteries;Circular economy;NITROGEN-DOPED CARBON;N-C CATALYSTS;METAL-FREE ELECTROCATALYSTS;FUEL-CELL;POROUS CARBON;ACTIVE-SITES;EFFICIENT ELECTROCATALYSTS;ALLOY ELECTROCATALYSTS;BACTERIAL CELLULOSE;CATHODE CATALYSTS,jose.zagal@usach.cl; stefania.specchia@polito.it,,"CAMPUS, 4 CRINAN ST, LONDON, N1 9XW, ENGLAND",,,,SPRINGERNATURE,2520-8489,,,,English,ELECTROCHEM ENERGY R,Review,WoS,Electrochemistry,WOS:001142296800002,2-s2.0-85182488001,Italy;Chile,usach.cl,Politecn Torino;Univ Santiago Chile,"Politecn Torino, Italy;Univ Santiago Chile, Chile","Zago, Stefano; Scarpetta-Pizo, Laura C.; Zagal, Jose H.; Specchia, Stefania"
"Shao, Y.Y., Dodelet, J.P., Wu, G., Zelenay, P.",PGM-Free Cathode Catalysts for PEM Fuel Cells: A Mini-Review on Stability Challenges,2019,ADVANCED MATERIALS,31,31,1807615,,,8,524,10.1002/adma.201807615,,"[Shao, Yuyan] Pacific Northwest Natl Lab, Richland, WA 99352 USA; [Dodelet, Jean-Pol] INRS Energie Mat & Telecommun, 1650 Blvd Lionel Boulet, Varennes, PQ J3X 1S2, Canada; [Wu, Gang] Univ Buffalo State Univ New York, Dept Chem & Biol Engn, Buffalo, NY 14260 USA; [Zelenay, Piotr] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA",,"In recent years, significant progress has been achieved in the development of platinum group metal-free (PGM-free) oxygen reduction reaction (ORR) catalysts for proton exchange membrane (PEM) fuel cells. At the same time the limited durability of these catalysts remains a great challenge that needs to be addressed. This mini-review summarizes the recent progress in understanding the main causes of instability of PGM-free ORR catalysts in acidic environments, focusing on transition metal/nitrogen codoped systems (M-N-C catalysts, M: Fe, Co, Mn), particularly MNx moiety active sites. Of several possible degradation mechanisms, demetalation and carbon oxidation are found to be the most likely reasons for M-N-C catalysts/cathodes degradation.",degradation; MNx moieties; oxygen reduction; PGM-free catalysts; platinum group metal-free catalysts,N-C CATALYSTS; OXYGEN-REDUCTION REACTION; NONPRECIOUS METAL ELECTROCATALYSTS; IRON-BASED CATALYSTS; FE/N/C-CATALYSTS; ACTIVE-SITES; CARBON NANOSTRUCTURES; O-2 REDUCTION; ACIDIC MEDIA; PERFORMANCE,degradation;MNx moieties;oxygen reduction;PGM-free catalysts;platinum group metal-free catalysts;N-C CATALYSTS;OXYGEN-REDUCTION REACTION;NONPRECIOUS METAL ELECTROCATALYSTS;IRON-BASED CATALYSTS;FE/N/C-CATALYSTS;ACTIVE-SITES;CARBON NANOSTRUCTURES;O-2 REDUCTION;ACIDIC MEDIA;PERFORMANCE,yuyan.shao@pnnl.gov,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,0935-9648,,,30779384,English,ADV MATER,Review,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000484129400007,2-s2.0-85061893244,United States;Canada,pnnl.gov,Pacific Northwest Natl Lab;INRS Energie Mat & Telecommun;Univ Buffalo State Univ New York;Los Alamos Natl Lab,"Pacific Northwest Natl Lab, United States;INRS Energie Mat & Telecommun, Canada;Univ Buffalo State Univ New York, United States;Los Alamos Natl Lab, United States","Shao, Yuyan; Dodelet, Jean-Pol; Wu, Gang; Zelenay, Piotr"
"Yang, X.H., Zhang, G.X., Du, L., Zhang, J., Chiang, F.K., Wen, Y.R., Wang, X.M., Wu, Y.C., Chen, N., Sun, S.H.",PGM-Free Fe/N/C and Ultralow Loading Pt/C Hybrid Cathode Catalysts with Enhanced Stability and Activity in PEM Fuel Cells,2020,ACS APPLIED MATERIALS & INTERFACES,12,12,,13739,13749,11,47,10.1021/acsami.9b18085,,"[Yang, Xiaohua; Zhang, Gaixia; Du, Lei; Zhang, Jun; Sun, Shuhui] Inst Natl Rech Sci Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada; [Chiang, Fu-Kuo] Natl Inst Low Carbon & Clean Energy, Beijing 102211, Peoples R China; [Wen, Yuren] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China; [Wang, Xiaomin; Wu, Yucheng] Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030024, Peoples R China; [Chen, Ning] Canadian Light Source Inc, Saskatoon, SK S7N 2V3, Canada",,"In this work, the stability behaviors of the state-of-the-art Fe/N/C and Pt/C catalysts (as well as the activation time of the latter) were first systematically investigated, under different cathode catalyst loadings, in the membrane electrode assemblies (MEA) in PEM fuel cells. Based on that, two types of cathode electrodes with the combination of Fe/N/C and Pt/C catalysts were developed (type I: layered hybrid catalysts with Pt/C next to the membrane and type II: uniformly mixed catalysts). In this way, the shortcomings of the Fe/N/C catalyst (the fast decay) and the Pt/C catalyst (the long activation time) can be compensated at the same time. The hybrid catalysts also showed a very short activation time (a few hours vs over 10 h for Pt/C with the same Pt loading). Comparing the two types of hybrid catalysts, type I shows a much higher current density. The loadings of the Fe/N/C and Pt/C catalysts in the hybrid electrode were systematically studied, with optimal values of 1.0 mg cm(-2) for Fe/N/C and 0.035 mg(Pt) cm(-2) for Pt/C. The Pt loading of this hybrid catalyst (type I) at the cathode only takes ca. 30% of the U.S. Department of Energy (DOE) target of Pt usage (0.100 mg(Pt) cm(-2)), while its mass activity of Pt (in H-2/O-2 PEMFC) is 0.22 A mg(Pt)(-1) at 0.9(iR-free) V, reaching half of the DOE activity target (0.44 A mg(Pt)(-1)), which is among the best performances reported so far. Via both half-cell and single-cell electrochemical evaluations together with other characterizations, the origin of the improved activity and stability is believed to be the synergistic effect between Pt/C and Fe/N/C catalysts to ORR. This work provides an effective strategy for engineering highly performing MEA for the industrialization of PEM fuel cells.",hybrid catalyst; Fe/N/C; Pt/C; peroxide; stability; PEMFCs,N-C CATALYSTS; OXYGEN REDUCTION; PERFORMANCE; ELECTROCATALYSTS; SITES; IRON; DURABILITY; NANOWIRES; SI,hybrid catalyst;Fe/N/C;Pt/C;peroxide;stability;PEMFCs;N-C CATALYSTS;OXYGEN REDUCTION;PERFORMANCE;ELECTROCATALYSTS;SITES;IRON;DURABILITY;NANOWIRES;SI,gaixia.zhang@emt.inrs.ca; shuhui@emt.inrs.ca,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1944-8244,,,32130853,English,ACS APPL MATER INTER,Article,WoS,Science & Technology - Other Topics; Materials Science,WOS:000526552100015,2-s2.0-85082401573,Canada;China,emt.inrs.ca,Inst Natl Rech Sci Energie Mat & Telecommun;Natl Inst Low Carbon & Clean Energy;Univ Sci & Technol Beijing;Taiyuan Univ Technol;Canadian Light Source Inc,"Inst Natl Rech Sci Energie Mat & Telecommun, Canada;Natl Inst Low Carbon & Clean Energy, China;Univ Sci & Technol Beijing, China;Taiyuan Univ Technol, China;Canadian Light Source Inc, Canada","Yang, Xiaohua; Zhang, Gaixia; Du, Lei; Zhang, Jun; Chiang, Fu-Kuo; Wen, Yuren; Wang, Xiaomin; Wu, Yucheng; Chen, Ning; Sun, Shuhui"
"He, Y.H., Wu, G.","PGM-Free Oxygen-Reduction Catalyst Development for Proton-Exchange Membrane Fuel Cells: Challenges, Solutions, and Promises",2022,ACCOUNTS OF MATERIALS RESEARCH,3,2,,224,236,13,123,10.1021/accountsmr.1c00226,,"[He, Yanghua; Wu, Gang] Univ Buffalo State Univ New York, Dept Chem & Biol Engn, Buffalo, NY 14260 USA",,"Proton-exchange membrane fuel cells (PEMFCs) are efficient and clean hydrogen energy technologies for transportation and stationary applications. Highly active and durable low-cost cathode catalysts for the oxygen-reduction reaction (ORR) under challenging acidic environments are desperately needed to address the cost and durability issues of PEMFCs. The most promising platinum group metal (PGM)-free catalysts for the ORR in acidic media are atomically dispersed and nitrogen coordinated metal site catalysts denoted as M-N-C, M = Fe, Co, or Mn. Due to significant efforts in the past few decades, these catalysts have demonstrated much-improved ORR activity and promising initial fuel cell performance approaching traditional Pt/C catalysts. However, the insufficient long-term stability (up to 5000 h) under PEMFC operation represents a primary technical barrier to making current PGM-free catalysts less viable yet in PEMFCs. In this Account, we highlight recent advances in synthesizing efficient PGM-free catalysts for the ORR in PEMFCs, emphasizing effective strategies to improve mass and intrinsic activity and the possible degradation mechanisms. In particular, a chemical doping method based on the zeolitic imidazolate framework (ZIF)-8 represents the key to developing efficient M-N-C catalysts containing atomically dispersed and nitrogen-coordinated single metal active sites (i.e., MN4). The newly acquired understanding of the formation mechanism of MN4 active sites during the thermal activation and its correlation to catalytic properties guide the rational catalyst design rather than relying on current trial-and-error approaches. Considerable efforts have further been invested in increasing the active site density and enhancing intrinsic activity by regulating carbon-phase structures and the local coordination environment. These highly active catalysts usually suffer from significant activity loss during the ORR. Therefore, breaking the activity-stability trade-off is the key to simultaneously achieving activity and stability in one catalyst, which is discussed on the basis of our recent successes in regulating local carbon structures surrounding active single metal sites. Significant research efforts toward understanding the degradation mechanisms and improving the lifetime of PGM-free catalysts are still crucial for viable applications in the future. Novel electrode designing strategies are needed to translate the PGM-free catalysts' ORR activity to solid-state electrolyte-based membrane electrode assemblies (MEAs) with robust three-phase (i.e., gas-liquid-solid) interfaces for efficient charge and mass transports for performance improvement. On the basis of our effort at the University at Buffalo supported by ElectroCat Consortium associated with U.S. DOE's Hydrogen and Fuel Cell Technologies Office, we provide a perspective on PGM-free cathode catalysts concerning remaining bottlenecks and future opportunities, aiming to inspire the community in both mechanistic understanding and technological development.",,CATHODE CATALYSTS; PERFORMANCE; CARBON; ELECTROCATALYSTS; DURABILITY; DESIGN; IRON,CATHODE CATALYSTS;PERFORMANCE;CARBON;ELECTROCATALYSTS;DURABILITY;DESIGN;IRON,gangwu@buffalo.edu,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,,,,,English,ACCOUNTS MATER RES,Article,WoS,Chemistry; Materials Science,WOS:000746501000001,2-s2.0-85126685268,United States,buffalo.edu,Univ Buffalo State Univ New York,"Univ Buffalo State Univ New York, United States","He, Yanghua; Wu, Gang"
"Bai, J.R., Lin, Y., Xu, J.N., Zhou, W.K., Zhou, P., Deng, Y.Y., Lian, Y.B.",PGM-free single atom catalysts for the oxygen reduction reaction in proton exchange membrane fuel cells,2024,CHEMICAL COMMUNICATIONS,60,56,,7113,7123,11,17,10.1039/d4cc02106a,,"[Bai, Jirong; Lin, Yao; Zhou, Pin; Deng, Yaoyao] Changzhou Inst Technol, Res Ctr Secondary Resources & Environm, Sch Chem Engn & Mat, Changzhou 213022, Peoples R China; [Xu, Jinnan; Zhou, Wangkai; Zhou, Pin] Jiangsu Univ Technol, Dept Chem & Chem Engn, Changzhou 213022, Peoples R China; [Lian, Yuebin] Changzhou Inst Technol, Sch Optoelect, Changzhou 213032, Peoples R China",,"The progress of proton exchange membrane fuel cells (PEMFCs) in the clean energy sector is notable for its efficiency and eco-friendliness, although challenges remain in terms of durability, cost and power density. The oxygen reduction reaction (ORR) is a key sluggish process and although current platinum-based catalysts are effective, their high cost and instability is a significant barrier. Single-atom catalysts (SACs) offer an economically viable alternative with comparable catalytic activity for ORR. The primary concern regarding SACs is their operational stability under PEMFCs conditions. In this article, we review current strategies for increasing the catalytic activity of SACs, including increasing active site density, optimizing metal center coordination through heteroatom doping, and engineering porous substrates. To enhance durability, we discuss methods to stabilize metal centers, mitigate the effects of the Fenton reaction, and improve graphitization of the carbon matrix. Future research should apply computational chemistry to predict catalyst properties, develop in situ characterization for real-time active site analysis, explore novel catalysts without the use of platinum-based catalysts to reduce dependence on rare and noble metal, and investigate the long-term stability of catalyst under operating conditions. The aim is to engineer SACs that meet and surpass the performance benchmarks of PEMFCs, contributing to a sustainable energy future. The progress of proton exchange membrane fuel cells (PEMFCs) in the clean energy sector is notable for its efficiency and eco-friendliness, although challenges remain in terms of durability, cost and power density.",,DOPED CARBON; NANOPARTICLES; PERFORMANCE; DURABILITY; STABILITY; CLUSTERS; SITES; ORR,DOPED CARBON;NANOPARTICLES;PERFORMANCE;DURABILITY;STABILITY;CLUSTERS;SITES;ORR,baijr@czu.cn; dengyy@czu.cn; lianyb@czu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,1359-7345,,,38912537,English,CHEM COMMUN,Review,WoS,Chemistry,WOS:001261723500001,2-s2.0-85197953143,China,czu.cn,Changzhou Inst Technol;Jiangsu Univ Technol,"Changzhou Inst Technol, China;Jiangsu Univ Technol, China","Bai, Jirong; Lin, Yao; Xu, Jinnan; Zhou, Wangkai; Zhou, Pin; Deng, Yaoyao; Lian, Yuebin"
"Meng, H., Jaouen, F., Proietti, E., Lefevre, M., Dodelet, J.P.",pH-effect on oxygen reduction activity of Fe-based electro-catalysts,2009,ELECTROCHEMISTRY COMMUNICATIONS,11,10,,1986,1989,4,127,10.1016/j.elecom.2009.08.035,,"[Meng, Hui; Jaouen, Frederic; Proietti, Eric; Lefevre, Michel; Dodelet, Jean-Pol] INRS Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada",,"Recently, our group reported on an innovative synthesis of Fe/N/C-catalysts that considerably increased their activity for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). This work investigates the ORR-activity in 0.1 M KOH and 0.1 M HClO4 of one such new Fe/N/C-catalyst prepared by ball-milling and compares it to that of a former Fe/N/C-catalyst prepared by impregnation and to that of 46 wt% Pt/C. At pH 13, the volumetric activities at 0.9 V vs. RHE of the ball-milling Fe/N/C-catalyst, the impregnation Fe/N/C-catalyst and 46 wt% Pt/C are 3.2, 0.3 and 14.8 A cm(-3), respectively. The ball-milling Fe/N/C-catalyst is promising for alkaline fuel cells. (C) 2009 Elsevier B.V. All rights reserved.",Fuel cell; Non-precious metal; Catalyst; Alkaline; Rotating-ring-disk-electrode,ALKALINE FUEL-CELLS; ELECTROREDUCTION; ELECTROCATALYSTS; CATHODES; FE/N/C; SITES; PT/C; AG/C; ORR,Fuel cell;Non-precious metal;Catalyst;Alkaline;Rotating-ring-disk-electrode;ALKALINE FUEL-CELLS;ELECTROREDUCTION;ELECTROCATALYSTS;CATHODES;FE/N/C;SITES;PT/C;AG/C;ORR,jaouen@emt.inrs.ca; dodelet@emt.inrs.ca,,"360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA",,,,ELSEVIER SCIENCE INC,1388-2481,,,,English,ELECTROCHEM COMMUN,Article,WoS,Electrochemistry,WOS:000271571300035,2-s2.0-70349728790,Canada,emt.inrs.ca,INRS Energie Mat & Telecommun,"INRS Energie Mat & Telecommun, Canada","Meng, Hui; Jaouen, Frederic; Proietti, Eric; Lefevre, Michel; Dodelet, Jean-Pol"
"Bae, G., Chung, M.W., Ji, S.G., Jaouen, F., Choi, C.H.",PH Effect on the H2O2-Induced Deactivation of Fe-N-C Catalysts,2020,ACS Catalysis,10,15,,8485,8495,,125,10.1021/acscatal.0c00948,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091168212&doi=10.1021%2Facscatal.0c00948&partnerID=40&md5=5d0adc71ac2497efc590d5a5b0f0215d,"School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea; Université de Montpellier, Montpellier, Occitanie, France","Bae, Geunsu, School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea; Chung, Min-wook, School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea; Ji, Sang-gu, School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea; Jaouen, Frédéric, Université de Montpellier, Montpellier, Occitanie, France; Choi, Chang Hyuck, School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea","Despite the promising activity of Fe-N-C catalysts at the beginning of life in proton-exchange membrane fuel cells (PEMFCs), their poor durability in operating PEMFCs remains a great challenge for the successful replacement of commercial Pt-based catalysts. One of the key reasons for this poor operando durability is the surface oxidation of carbonaceous supports via Fenton(-like) reactions between the Fe centers and the intermediate product of the oxygen reduction reaction (ORR) in an acidic medium, H2O2. In the present study, we have investigated the pH effect on the chemical deactivation of Fe-N-C catalysts by contacting them with a controlled amount of H2O2. Covering the entire pH range 0-14, we reveal a strong pH dependence of the H2O2-induced deactivation. Especially, acidic H2O2 treatment leads to a severe decrease in ORR activity while almost negligible deactivation is found after a treatment in a sufficiently strong alkaline electrolyte. An electron paramagnetic resonance (EPR) study reveals a positive correlation between the magnitude of Fe-N-C activity decrease and the signal intensity of the hydroxyl radical spin adduct after H2O2 treatment at a given pH. A reactive oxygen species (ROS) such as the hydroxyl radical is identified as a key deactivating agent of Fe-N-C catalysts operating from acidic to neutral pH environments. This result suggests that controlling the formation and lifetime of ROS at such pH is crucial to secure durable fuel cell operation with Fe-N-C cathodes. Alternatively, fuel cell operation under highly alkaline environment could also be considered to improve the catalytic durability, by virtue of a different Fenton(-like) reaction pathway at such pH. © © 2020 American Chemical Society.",degradation; durability; Fe-N-C catalysts; Fenton reaction; hydrogen peroxide,Alkalinity; Catalyst deactivation; Durability; Electrolytes; Electrolytic reduction; Electron spin resonance spectroscopy; Oxidation; Oxygen; Oxygen reduction reaction; Paramagnetic resonance; pH effects; Proton exchange membrane fuel cells (PEMFC); Reaction intermediates; Alkaline electrolytes; Alkaline environment; Carbonaceous supports; Chemical deactivation; Electron paramagnetic resonances (EPR); Intermediate product; Positive correlations; Proton exchange membrane fuel cell (PEMFCs); Iron compounds,degradation;durability;Fe-N-C catalysts;Fenton reaction;hydrogen peroxide;Alkalinity;Catalyst deactivation;Electrolytes;Electrolytic reduction;Electron spin resonance spectroscopy;Oxidation;Oxygen;Oxygen reduction reaction;Paramagnetic resonance;pH effects;Proton exchange membrane fuel cells (PEMFC);Reaction intermediates;Alkaline electrolytes;Alkaline environment;Carbonaceous supports;Chemical deactivation;Electron paramagnetic resonances (EPR);Intermediate product;Positive correlations;Proton exchange membrane fuel cell (PEMFCs);Iron compounds,"C.H. Choi; School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, South Korea; email: chchoi@gist.ac.kr; F. Jaouen; Icgm, Univ. Montpellier, CNRS, Enscm, Montpellier, France; email: frederic.jaouen@umontpellier.fr",,,,,,American Chemical Society service@acs.org,21555435,,ACCAC,,English,ACS Catal.,Article,Scopus,,2-s2.0-85091168212,,South Korea;France,gist.ac.kr,,,"Bae, G.; Chung, M.W.; Ji, S.G.; Jaouen, F.; Choi, C.H."
"Yin, H., Yuan, P., Lu, B.A., Xia, H., Guo, K., Yang, G., Qu, G., Xue, D., Hu, Y., Cheng, J., Mu, S., Zhang, J.N.",Phosphorus-Driven Electron Delocalization on Edge-Type FeN4Active Sites for Oxygen Reduction in Acid Medium,2021,ACS Catalysis,11,20,,12754,12762,,151,10.1021/acscatal.1c02259,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85117813698&doi=10.1021%2Facscatal.1c02259&partnerID=40&md5=0abd4a8f44ad4d14016636d02f93de77,"College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, Henan, China; Centre Canadien de Rayonnement Synchrotron, Saskatoon, SK, Canada; Wuhan University of Technology, Wuhan, Hubei, China; Foshan Xianhu Laboratory, Foshan, China","Yin, Hengbo, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Yuan, Pengfei, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, Henan, China; Lu, Bangan, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Xia, Huicong, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Guo, Kai, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Yang, Gege, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Qu, Gan, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Xue, Dongping, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Hu, Yongfeng, Centre Canadien de Rayonnement Synchrotron, Saskatoon, SK, Canada; Cheng, Junqi, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Mu, Shichun, Wuhan University of Technology, Wuhan, Hubei, China, Foshan Xianhu Laboratory, Foshan, China; Zhang, Jianan, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China","Precise tuning of the chemical environment of neighboring atomic FeN<inf>4</inf>sites is extremely important for optimizing Fe-N-C catalysts to produce the fast oxygen reduction reaction (ORR) kinetics both in acidic and alkaline media, but it is actually very challenging. Heteroatoms could affect the metal charge of the active center through long-range electron delocalization; however, there are a few studies on it. Herein, density functional theory (DFT) calculations demonstrate that the addition of long-range P into edge-type FeN<inf>4</inf>can drive the electron delocalization and decrease the band gap of the FeN<inf>4</inf>center, leading to a substantial decrease in the free energy barrier to direct four-electron ORR kinetics compared to P-free edge-type FeN<inf>4</inf>, indicating superior intrinsic ORR activity. Experimentally, by incorporating P in edge-rich FeN<inf>4</inf>supported on N,P-doped carbon (Fe-N-C-P/N,P-C), the created Fe-N-C catalyst presents the greatly increased acidic ORR activity, with a half-wave potential (E<inf>1/2</inf>) of 0.80 V (vs a reversible hydrogen electrode), which approaches that of commercial Pt/C and also has a high half-wave potential of 0.87 V, beyond Pt/C for alkaline ORR. In addition, it shows higher proton exchange membrane fuel cell and Zn-air battery performances than the pristine Fe-C-N catalyst (Fe-N-C/N-C). This work will guide the rational design of highly active metal atomic scale catalysts with optimized chemical surroundings in terms of P incorporation as a chemically tunable method. © 2021 American Chemical Society",edge sites; electron delocalization; FeN4; oxygen reduction reaction; P coordination,Alkalinity; Catalysts; Coordination reactions; Density functional theory; Design for testability; Electrolytic reduction; Electrons; Energy gap; Free energy; Metals; Oxygen; Phosphorus; Reaction kinetics; Zinc compounds; Active site; Edge sites; Electron delocalization; Half-wave potential; Oxygen Reduction; Oxygen reduction reaction; Oxygen reduction reaction kinetics; P coordination; Reaction activity; ]+ catalyst; Iron compounds,edge sites;electron delocalization;FeN4;oxygen reduction reaction;P coordination;Alkalinity;Catalysts;Coordination reactions;Density functional theory;Design for testability;Electrolytic reduction;Electrons;Energy gap;Free energy;Metals;Oxygen;Phosphorus;Reaction kinetics;Zinc compounds;Active site;Half-wave potential;Oxygen Reduction;Oxygen reduction reaction kinetics;Reaction activity;]+ catalyst;Iron compounds,"S. Mu; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China; email: msc@whut.edu.cn; J.-N. Zhang; College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China; email: zjn@zzu.edu.cn",,,,,,American Chemical Society,21555435,,ACCAC,,English,ACS Catal.,Article,Scopus,,2-s2.0-85117813698,,China;Canada,whut.edu.cn,,,"Yin, H.; Yuan, P.; Lu, B.-A.; Xia, H.; Guo, K.; Yang, G.; Qu, G.; Xue, D.; Hu, Y.; Cheng, J.; Mu, S.; Zhang, J.-N."
"Jin, X.R., Li, Y.J., Sun, H., Gao, X.X., Li, J.Z., Lu, Z., Liu, W., Sun, X.M.",Phosphorus induced activity-enhancement of Fe-N-C catalysts for high temperature polymer electrolyte membrane fuel cells,2023,NANO RESEARCH,16,5,,6531,6536,6,15,10.1007/s12274-022-5314-2,,"[Jin, Xiangrong; Li, Yajie; Sun, Hao; Gao, Xiangxiang; Lu, Zhi; Liu, Wen; Sun, Xiaoming] Beijing Univ Chem Technol, Coll Chem, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China; [Li, Jiazhan] Tsinghua Univ, Dept Chem, Engn Res Ctr Adv Rare Earth Mat, Beijing 100084, Peoples R China",,"Fe -N -C materials with atomically dispersed Fe-N4 sites could tolerate the poisoning of phosphate, and is regarded as the most promising alternative to costly Pt-based catalysts for the oxygen reduction in high temperature polymer electrolyte membrane fuel cells (HT-PEMFCs). However, they still face the critical issue of insufficient activity in phosphoric acid. Herein, we demonstrate a P -doping strategy to increase the activity of Fe -N -C catalyst via a feasible one-pot method. X-ray absorption spectroscopy and electron microscopy with atomic resolution indicated that the P atom is bonded with the N in Fe-N-4 site through C atoms. The as prepared Fe-NCP catalyst shows a half-wave potential of 0.75 V (vs. reversible hydrogen electrode (RHE), 0.1 M H3PO4), which is 60 and 40 mV higher than that of Fe-NC and commercial Pt/C catalysts, respectively. More importantly, the Fe-NCP catalyst could deliver a peak power density of 357 mW.cm(-2) in a high temperature fuel cell (160 degrees C), exceeding the non -noble-metal catalysts ever reported. The enhancement of activity is attributed to the increasing charge density and poisoning tolerance of Fe-N-4 caused by neighboring P. This work not only promotes the practical application of Fe -N -C materials in HT-PEMFCs, but also provides a feasible P -doping method for regulating the structure of single atom site.",iron nitrogen carbon; heteroatomic doping; phosphorous tolerance; high temperature polymer electrolyte membrane fuel cells,OXYGEN REDUCTION REACTION; ANION ADSORPTION; ELECTROCATALYSTS; PHOSPHATE; NITROGEN; PLATINUM; DESIGN,iron nitrogen carbon;heteroatomic doping;phosphorous tolerance;high temperature polymer electrolyte membrane fuel cells;OXYGEN REDUCTION REACTION;ANION ADSORPTION;ELECTROCATALYSTS;PHOSPHATE;NITROGEN;PLATINUM;DESIGN,liz102777@163.com; luzhi@mail.buct.edu.cn; wenliu@mail.buct.edu.cn; sunxm@mail.buct.edu.cn,,"B605D, XUE YAN BUILDING, BEIJING, 100084, PEOPLES R CHINA",,,,TSINGHUA UNIV PRESS,1998-0124,,,,English,NANO RES,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000903477800002,,China,163.com,Beijing Univ Chem Technol;Tsinghua Univ,"Beijing Univ Chem Technol, China;Tsinghua Univ, China","Jin, Xiangrong; Li, Yajie; Sun, Hao; Gao, Xiangxiang; Li, Jiazhan; Lu, Zhi; Liu, Wen; Sun, Xiaoming"
"Kumar, K., Gairola, P., Lions, M., Ranjbar-Sahraie, N., Mermoux, M., Dubau, L., Zitolo, A., Jaouen, F., Maillard, F.",Physical and Chemical Considerations for Improving Catalytic Activity and Stability of Non-Precious-Metal Oxygen Reduction Reaction Catalysts,2018,ACS Catalysis,8,12,,11264,11276,,125,10.1021/acscatal.8b02934,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85056445522&doi=10.1021%2Facscatal.8b02934&partnerID=40&md5=fbb2238b15f925844211397d04ea2ed1,"Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; L'Orme des Merisiers, SOLEIL Synchrotron, Gif-sur-Yvette, France","Kumar, Kavita, Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Gairola, Priyanka, Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Lions, Mathieu, Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Ranjbar-Sahraie, Nastaran, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Mermoux, Michel, Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Dubau, Laetitia, Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Zitolo, Andrea, L'Orme des Merisiers, SOLEIL Synchrotron, Gif-sur-Yvette, France; Jaouen, Frédéric, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Maillard, Frédéric M., Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France","Recent non-precious-metal catalysts (NPMCs) show promise to replace in the future platinum-based catalysts currently needed for the electroreduction of oxygen (ORR) in proton-exchange membrane fuel cells (PEMFCs). Among NPMCs, the most mature subclass of materials is prepared via the pyrolysis of metal (Fe and Co), nitrogen, and carbon precursors (labeled as metal-NC). Such materials often comprise different types of nitrogen groups and metal species, from atomically dispersed metal ions coordinated to nitrogen to metallic or metal-carbide particles, partially or completely embedded in graphene shells. While disentangling the different contributions of these species to the initial ORR activity of metal-NC catalysts with multidunous active sites is complex, following the fate of these different active sites during electrochemical aging is even more difficult. To shed light onto this, herein, six metal-NC catalysts were synthesized and characterized before/after aging with two different accelerated stress tests (AST) simulating PEMFC cathode operating conditions either in steady-state or transient conditions. The samples differed from each other by the nature of the metal (Fe or Co), the metal content, and the heating mode applied during pyrolysis. Catalysts featuring either only atomically dispersed metal-ion sites (metal-N<inf>x</inf>C<inf>y</inf>) or only metal nanoparticles encapsulated in the carbon matrix (metal@N-C) were obtained after pyrolysis of catalyst precursors containing 0.5 or 5.0 wt % of metal, respectively. All six catalysts showed high beginning-of-life ORR mass activity, but the ASTs revealed marked differences in their ORR activity at end-of-life. After the load-cycling AST (10000 cycles), metal-NC catalysts with metal-N<inf>x</inf>C<inf>y</inf> sites retained most of their initial activity at 0.8 V (60-100%), while those with metal@N-C particles retained only a small fraction of initial activity (10-20%). Metal-NC catalysts with metal-N<inf>x</inf>C<inf>y</inf> sites lost only 25% of their initial ORR activity after 30000 load cycles at 80 °C, thereby reaching the 2020 stability target defined by US Department of Energy. After 10000 start-up/shut-down cycles, no catalyst showed measurable ORR activity at 0.8 V. However, after 1000 start-up/shut-down cycles, most of the metal-NC catalysts initially comprising metal-N<inf>x</inf>C<inf>y</inf> sites showed measurable ORR activity at 0.8 V, while those initially comprising metal@N-C particles did not. Energy-dispersive X-ray spectroscopy and Raman spectroscopy measurements of the cycled rotating disk electrodes revealed that demetalation of the catalytic centers and corrosion of the carbon matrix are the main causes of ORR activity decay during load-cycling and start-up/shut-down cycling, respectively. In contrast to what could have been intuitively expected, the metal-N<inf>x</inf>C<inf>y</inf> sites are more robust to both demetalation and carbon corrosion than metal@N-C sites. © 2018 American Chemical Society.",carbon corrosion; demetalation; non-precious-metal catalysts; oxygen reduction reaction; proton-exchange membrane fuel cells,Carbides; Carbon; Chemical stability; Corrosion; Electrodes; Electrolytic reduction; Energy dispersive spectroscopy; Metal ions; Metal nanoparticles; Oxygen; Precious metals; Proton exchange membrane fuel cells (PEMFC); Pyrolysis; Rotating disks; Carbon corrosion; Demetalation; Electroreduction of oxygens; Energy dispersive X ray spectroscopy; Non-precious metal catalysts; Oxygen reduction reaction; Proton exchange membrane fuel cell (PEMFCs); Raman spectroscopy measurements; Catalyst activity,carbon corrosion;demetalation;non-precious-metal catalysts;oxygen reduction reaction;proton-exchange membrane fuel cells;Carbides;Carbon;Chemical stability;Corrosion;Electrodes;Electrolytic reduction;Energy dispersive spectroscopy;Metal ions;Metal nanoparticles;Oxygen;Precious metals;Proton exchange membrane fuel cells (PEMFC);Pyrolysis;Rotating disks;Electroreduction of oxygens;Energy dispersive X ray spectroscopy;Non-precious metal catalysts;Proton exchange membrane fuel cell (PEMFCs);Raman spectroscopy measurements;Catalyst activity,"F. Jaouen; CNRS, Université de Montpellier, ENSCM, U MR 5253 Institut Charles Gerhardt Montpellier, Montpellier, 2 place Eugène Bataillon, F-34095, France; email: frederic.jaouen@umontpellier.fr",,,,,,American Chemical Society service@acs.org,21555435,,ACCAC,,English,ACS Catal.,Article,Scopus,,2-s2.0-85056445522,,France,umontpellier.fr,,,"Kumar, K.; Gairola, P.; Lions, M.; Ranjbar-Sahraie, N.; Mermoux, M.; Dubau, L.; Zitolo, A.; Jaouen, F.; Maillard, F."
"Workman, M.J., Dzara, M., Ngo, C., Pylypenko, S., Serov, A., McKinney, S., Gordon, J., Atanassov, P., Artyushkova, K.",Platinum group metal-free electrocatalysts: Effects of synthesis on structure and performance in proton-exchange membrane fuel cell cathodes,2017,JOURNAL OF POWER SOURCES,348,,,30,39,10,65,10.1016/j.jpowsour.2017.02.067,,"[Workman, Michael J.; Serov, Alexey; Gordon, Jonathan; Atanassov, Plamen; Artyushkova, Kateryna] Univ New Mexico, Dept Chem & Biol Engn, Ctr Microengn Mat, Albuquerque, NM 87131 USA; [Dzara, Michael; Ngo, Chilan; Pylypenko, Svitlana] Colorado Sch Mines, Dept Chem, Golden, CO 80401 USA; [McKinney, Sam] Pajarito Powder LLC, Albuquerque, NM 87102 USA",,"Development of platinum group metal free catalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs) requires understanding of the interactions between surface chemistry and performance, both of which are strongly dependent on synthesis conditions. To elucidate these complex relationships, a set of Fe-N-C catalysts derived from the same set of precursor materials is fabricated by varying several key synthetic parameters under controlled conditions. The results of physicochemical characterization are presented and compared with the results of rotating disk electrode (RDE) analysis and fuel cell testing. We find that electrochemical performance is strongly correlated with three key properties related to catalyst composition: concentrations of 1) atomically dispersed Fe species, 2) species in which N is bound to Fe, and 3) surface oxides. Not only are these factors related to performance, these types of chemical species are shown to correlate with each other. This study provides evidence supporting the role of iron coordinated with nitrogen as an active species for the ORR, and offers synthetic pathways to increase the density of atomically dispersed iron species and surface oxides for optimum performance. (C) 2017 Elsevier B.V. All rights reserved.",Fuel cell; PGM-Free; XPS; TEM EDS; Structure to property,OXYGEN REDUCTION REACTION; NITROGEN-DOPED CARBON; N-C CATALYSTS; ACTIVE-SITES; IRON; MORPHOLOGY; OXIDATION; FRAMEWORK; SILICA,Fuel cell;PGM-Free;XPS;TEM EDS;Structure to property;OXYGEN REDUCTION REACTION;NITROGEN-DOPED CARBON;N-C CATALYSTS;ACTIVE-SITES;IRON;MORPHOLOGY;OXIDATION;FRAMEWORK;SILICA,spylypen@mines.edu; kartyush@unm.edu,,"PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS",,,,ELSEVIER SCIENCE BV,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:000399867300005,2-s2.0-85014041914,United States,mines.edu,Univ New Mexico;Colorado Sch Mines;Pajarito Powder LLC,"Univ New Mexico, United States;Colorado Sch Mines, United States;Pajarito Powder LLC, United States","Workman, Michael J.; Dzara, Michael; Ngo, Chilan; Pylypenko, Svitlana; Serov, Alexey; McKinney, Sam; Gordon, Jonathan; Atanassov, Plamen; Artyushkova, Kateryna"
"Kicinski, W., Dyjak, S., Gratzke, M., Tokarz, W., Blachowski, A.",Platinum group metal-free Fe-N-C catalysts for PEM fuel cells derived from nitrogen and sulfur doped synthetic polymers,2022,FUEL,328,,125323,,,13,21,10.1016/j.fuel.2022.125323,,"[Kicinski, Wojciech; Dyjak, Slawomir; Gratzke, Mateusz] Mil Univ Technol, Inst Chem, 2 Kaliskiego Str, PL-00908 Warsaw, Poland; [Tokarz, Wojciech] Lukasiewicz Res Network, Moscicki Ind Chem Res Inst ICRI, 8 Rydygiera Str, PL-01793 Warsaw, Poland; [Blachowski, Artur] AGH Univ Sci & Technol, Fac Geol Geophys & Environm Protect, 30 Mickiewicza Ave, PL-30059 Krakow, Poland",,"Fe-N-C electrocatalysts were obtained via pyrolysis of N- or N/S co-doped synthetic polymers impregnated with FeCl3. The influence of the presence/absence of sulfur co-doping, the initial FeCl3 content and phenanthmline addition on the Fe-N-C-based cathode catalyst layers (CCLs) performance in H-2-air PEM fuel cells was studied. To this end the Fe-N-C materials were first characterized concerning their chemical composition, surface chemistry, porosity and morphology. Sulfur and phenanthmline additions strongly affect these characteristics of Fe-N-C materials. This in turn determines (to various extents) the electrochemical properties as measured with a rotating ring-disk electrode and upon infusion in the cathode catalyst layer in H-2-air PEM fuel cells. While simultaneous sulfur and phenanthroline addition yields Fe-N-C catalysts with high N-content and specific surface area, this does not translate into good electrochemical performance. We discuss the multitude of factors determining the catalysts' and the final CCLs' performances and conclude that the specific micro-colloidal morphology of the carbon gel-based materials dominates other Fe-N-C characteristics and determines overall FC performance. The best performing CCL provided peak power density of similar to 0.15 W.cm(-2) in a H-2-air PEMFC.",Platinum group metal-free (PGM-free) catalyst; Fe-N-C catalyst; Oxygen reduction reaction (ORR); Nitrogen-doped carbon; Sulfur-doped carbon,OXYGEN REDUCTION REACTION; ACTIVE-SITES; ELECTROCATALYSTS; IMPACT,Platinum group metal-free (PGM-free) catalyst;Fe-N-C catalyst;Oxygen reduction reaction (ORR);Nitrogen-doped carbon;Sulfur-doped carbon;OXYGEN REDUCTION REACTION;ACTIVE-SITES;ELECTROCATALYSTS;IMPACT,wojciech.kicinski@wat.edu.pl,,"125 London Wall, London, ENGLAND",,,,ELSEVIER SCI LTD,0016-2361,,,,English,FUEL,Article,WoS,Energy & Fuels; Engineering,WOS:000846772100001,,Poland,wat.edu.pl,Mil Univ Technol;Lukasiewicz Res Network;AGH Univ Sci & Technol,"Mil Univ Technol, Poland;Lukasiewicz Res Network, Poland;AGH Univ Sci & Technol, Poland","Kicinski, Wojciech; Dyjak, Slawomir; Gratzke, Mateusz; Tokarz, Wojciech; Blachowski, Artur"
"Kulikovsky, A.A.",Polarization curve of a PEM fuel cell with the account of a finite rate of oxygen adsorption on Pt surface,2014,INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,39,33,,19018,19023,6,9,10.1016/j.ijhydene.2014.08.108,,"[Kulikovsky, A. A.] Res Ctr Julich, Inst Energy & Climate Res, Electrochem Proc Engn IEK 3, D-52425 Julich, Germany; [Kulikovsky, A. A.] Moscow MV Lomonosov State Univ, Ctr Res Comp, Moscow 119991, Russia",,"We report a model for performance of the cathode catalyst layer in PEM fuel cell; the model takes into account a finite rate of oxygen adsorption on Pt surface. An analytical polarization curve of the cathode catalyst layer is derived. The curve is fitted to recent experimental polarization curves; the equivalent current density of O-2 adsorption on Pt surface is estimated to be 0.18 A cm(pt)(-2).We show that decrease in the cell performance due to finite rate of O-2 adsorption at a small catalyst loading can be mitigated by making a gradient electrode with the catalyst loading growing toward the membrane. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.",PEMFC; Cathode catalyst layer; Oxygen adsorption; Modeling,REDUCTION REACTION; FE/N/C-CATALYSTS; ELECTROCATALYSTS; TRANSPORT; MECHANISM; CATHODE; IMPACT; LAYER,PEMFC;Cathode catalyst layer;Oxygen adsorption;Modeling;REDUCTION REACTION;FE/N/C-CATALYSTS;ELECTROCATALYSTS;TRANSPORT;MECHANISM;CATHODE;IMPACT;LAYER,A.Kulikovsky@fz-juelich.de,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0360-3199,,,,English,INT J HYDROGEN ENERG,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels,WOS:000345803900032,,Germany;Russian Federation,fz-juelich.de,Res Ctr Julich;Moscow MV Lomonosov State Univ,"Res Ctr Julich, Germany;Moscow MV Lomonosov State Univ, Russian Federation","Kulikovsky, A. A."
"Aili, D., Henkensmeier, D., Martin, S., Singh, B., Hu, Y., Jensen, J.O., Cleemann, L.N., Li, Q.F.",Polybenzimidazole-Based High-Temperature Polymer Electrolyte Membrane Fuel Cells: New Insights and Recent Progress,2020,ELECTROCHEMICAL ENERGY REVIEWS,3,4,,793,845,53,171,10.1007/s41918-020-00080-5,,"[Aili, David; Martin, Santiago; Hu, Yang; Jensen, Jens Oluf; Cleemann, Lars N.; Li, Qingfeng] Tech Univ Denmark, Dept Energy Convers & Storage, DK-2800 Lyngby, Denmark; [Henkensmeier, Dirk] Korea Inst Sci & Technol, Ctr Hydrogen & Fuel Cell Res, Seoul 02792, South Korea; [Henkensmeier, Dirk] Univ Sci & Technol, KIST Sch, Div Energy & Environm Technol, Seoul 02792, South Korea; [Henkensmeier, Dirk] Korea Univ, Green Sch, Seoul 02841, South Korea; [Martin, Santiago] UNED, Fac Ciencias, Dept Fis Matemat & Fluidos, Madrid 28040, Spain; [Singh, Bhupendra] Adv Mat & Proc Res Inst AMPRI, CSIR, Bhopal 462026, India",,"High-temperature proton exchange membrane fuel cells based on phosphoric acid-doped polybenzimidazole membranes are a technology characterized by simplified construction and operation along with possible integration with, e.g., methanol reformers. Significant progress has been achieved in terms of key materials, components and systems. This review is devoted to updating new insights into the fundamental understanding and technological deployment of this technology. Polymers are synthetically modified with basic functionalities, and membranes are improved through cross-linking and inorganic-organic hybridization. New insights into phosphoric acid along with its interactions with basic polymers, metal catalysts and carbon-based supports are recapped. Recognition of parasitic acid migration raises acid retention issues at high current densities. Acid loss via evaporation is estimated with respect to the acid inventory of membrane electrode assembly. Acid adsorption on platinum surfaces can be alleviated for platinum alloys and non-precious metal catalysts. Binders have been considered a key to the establishment of the triple-phase boundary, while recent development of binderless electrodes opens new avenues toward low Pt loadings. Often ignored microporous layers and water impacts are also discussed. Of special concern are durability issues including acid loss, platinum sintering and carbon corrosion, the latter being critical during start/stop cycling with mitigation measures proposed. Long-term durability has been demonstrated with a voltage degradation rate of less than 1 mu V h(-1) under steady-state tests at 160 degrees C, while challenges remain at higher temperatures, current densities or reactant stoichiometries, particularly during dynamic operation with thermal, load or start/stop cycling.",High-temperature proton exchange membrane fuel cell; HT-PEMFC; Polybenzimidazole (PBI); Phosphoric acid; Proton conductivity; Gas diffusion electrode; Performance and durability,PROTON-EXCHANGE MEMBRANE; ACID DOPED POLYBENZIMIDAZOLE; OXYGEN-REDUCTION REACTION; GAS-DIFFUSION ELECTRODE; POLY(ARYLENE ETHER KETONE); PBI COMPOSITE MEMBRANES; THERMAL CROSS-LINKING; CNT HYBRID ELECTRODE; MICRO COMBINED HEAT; PHOSPHORIC-ACID,High-temperature proton exchange membrane fuel cell;HT-PEMFC;Polybenzimidazole (PBI);Phosphoric acid;Proton conductivity;Gas diffusion electrode;Performance and durability;PROTON-EXCHANGE MEMBRANE;ACID DOPED POLYBENZIMIDAZOLE;OXYGEN-REDUCTION REACTION;GAS-DIFFUSION ELECTRODE;POLY(ARYLENE ETHER KETONE);PBI COMPOSITE MEMBRANES;THERMAL CROSS-LINKING;CNT HYBRID ELECTRODE;MICRO COMBINED HEAT;PHOSPHORIC-ACID,qfli@dtu.dk,,"CAMPUS, 4 CRINAN ST, LONDON, N1 9XW, ENGLAND",,,,SPRINGERNATURE,2520-8489,,,,English,ELECTROCHEM ENERGY R,Review,WoS,Electrochemistry,WOS:000574497100001,2-s2.0-85106913964,Denmark;South Korea;Spain;India,dtu.dk,Tech Univ Denmark;Korea Inst Sci & Technol;Univ Sci & Technol;Korea Univ;UNED;Adv Mat & Proc Res Inst AMPRI,"Tech Univ Denmark, Denmark;Korea Inst Sci & Technol, South Korea;Univ Sci & Technol, South Korea;Korea Univ, South Korea;UNED, Spain;Adv Mat & Proc Res Inst AMPRI, India","Aili, David; Henkensmeier, Dirk; Martin, Santiago; Singh, Bhupendra; Hu, Yang; Jensen, Jens Oluf; Cleemann, Lars N.; Li, Qingfeng"
"Jiang, Y., Xu, H., Ma, B., Zhang, Z., Zhou, Y.",Polypyrrole derived carbon nanotube aerogel based single-site Fe-N-C catalyst with superior ORR activity and durability,2024,Fuel,366,,131404,,,,18,10.1016/j.fuel.2024.131404,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85186760726&doi=10.1016%2Fj.fuel.2024.131404&partnerID=40&md5=1de5afb27951cd2815aff8188eb58b00,"The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, Hubei, China; College of Sciences, Wuhan University of Science and Technology, Wuhan, Hubei, China","Jiang, Yuan, The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, Hubei, China; Xu, Haili, The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, Hubei, China; Ma, Ben, The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, Hubei, China, College of Sciences, Wuhan University of Science and Technology, Wuhan, Hubei, China; Zhang, Zexin, The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, Hubei, China; Zhou, Yingke, The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, Hubei, China","Single-atom catalysts maximize atomic utilization efficiency while providing tunable active sites, making them promising candidates for replacing expensive noble metals in electrochemical reactions. However, isolated metal atoms tend to aggregate irreversibly due to high surface energy, deteriorating both activity and durability. Herein, we report a single-site Fe-N-C oxygen reduction reaction (ORR) catalyst synthesized by pyrolyzing an iron-loaded polypyrrole aerogel precursor. The resultant Fe-N-C catalyst comprises crosslinked nitrogen-doped carbon nanotubes with high specific surface area and abundant mesopores. Compared to commercial Pt/C, it demonstrates remarkable improvements in half-wave potential (0.81 V vs 0.84 V) and limiting current density (4.31 mA cm−2 vs 4.8 mA cm−2) for ORR. Stability and methanol tolerance tests further verify excellent durability under alkaline conditions. Crucially, by applying this Fe-N-C catalyst in anion exchange membrane fuel cells, outstanding peak power density of 150 mW cm−2 is achieved, outperforming commercial Pt/C cathodes (127 mW cm−2). Our single-site catalyst provides a promising strategy to develop durable and active non-precious metal ORR electrocatalysts through rational aerogel precursor design and pyrolysis. © 2024 Elsevier Ltd",Aerogel based Fe-N-C; Anion-exchange membrane fuel cell; Oxygen reduction reaction; Single-site catalyst,Alkaline fuel cells; Atoms; Carbon nanotubes; Catalyst activity; Doping (additives); Durability; Electrocatalysts; Electrolytic reduction; Ion exchange membranes; Iron compounds; Nanocatalysts; Oxygen; Precious metals; Proton exchange membrane fuel cells (PEMFC); Aerogel based fe-N-C; Anion-exchange membrane fuel cells; Derived carbons; Oxygen reduction reaction; Reaction activity; Single sites; Single-atoms; Single-site catalysts; Utilization efficiency; ]+ catalyst; Aerogels,Aerogel based Fe-N-C;Anion-exchange membrane fuel cell;Oxygen reduction reaction;Single-site catalyst;Alkaline fuel cells;Atoms;Carbon nanotubes;Catalyst activity;Doping (additives);Durability;Electrocatalysts;Electrolytic reduction;Ion exchange membranes;Iron compounds;Nanocatalysts;Oxygen;Precious metals;Proton exchange membrane fuel cells (PEMFC);Anion-exchange membrane fuel cells;Derived carbons;Reaction activity;Single sites;Single-atoms;Single-site catalysts;Utilization efficiency;]+ catalyst;Aerogels,"B. Ma; The State Key Laboratory of Refractories and Metallurgy, Institute of Advanced Materials and Nanotechnology, Wuhan University of Science and Technology, Wuhan, 430081, China; email: maben@wust.edu.cn",,,,,,Elsevier Ltd,00162361,,FUELA,,English,Fuel,Article,Scopus,,2-s2.0-85186760726,,China,wust.edu.cn,,,"Jiang, Y.; Xu, H.; Ma, B.; Zhang, Z.; Zhou, Y."
"Yin, Y., Zhou, X., Liu, H., Guan, C., Zhu, M., Wang, L., Zhang, J.",Pore-engineered Fe–N–C catalyst layer enabling hydration stability for >100 °C fuel cells,2025,Carbon,245,,120760,,,,0,10.1016/j.carbon.2025.120760,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105014245241&doi=10.1016%2Fj.carbon.2025.120760&partnerID=40&md5=2c5943c7f716c78ef66aa41b3011f9ca,"State Key Laboratory of Engines, Tianjin University, Tianjin, China; Tianjin University, Tianjin, China","Yin, Yan, State Key Laboratory of Engines, Tianjin University, Tianjin, China, Tianjin University, Tianjin, China; Zhou, Xiangju, State Key Laboratory of Engines, Tianjin University, Tianjin, China, Tianjin University, Tianjin, China; Liu, Haotian, State Key Laboratory of Engines, Tianjin University, Tianjin, China, Tianjin University, Tianjin, China; Guan, Chengshuo, State Key Laboratory of Engines, Tianjin University, Tianjin, China, Tianjin University, Tianjin, China; Zhu, Mingshuang, State Key Laboratory of Engines, Tianjin University, Tianjin, China, Tianjin University, Tianjin, China; Wang, Lianqin, State Key Laboratory of Engines, Tianjin University, Tianjin, China, Tianjin University, Tianjin, China; Zhang, Junfeng, State Key Laboratory of Engines, Tianjin University, Tianjin, China, Tianjin University, Tianjin, China","Proton exchange membrane fuel cells (PEMFCs) operating above 100 °C offer enhanced catalyst reaction kinetics and simplified thermal management but face severe performance degradation due to catalyst layer (CL) dehydration under low-humidity. Therefore, enhancing water retention of the CL is equally as crucial as increasing the active site density (ASD) for medium-temperature operation. Herein, we synthesized an Fe–N–C catalyst (NCFe–Li+&K+) by utilizing metal salt-activated carbon supports. Using this method, the NCFe–Li+&K+ achieved an ASD of 65.91 μmol g−1, 2.5 times that of the catalyst without metal salt-activated (NCFe-0, 25.78 μmol g−1), and exhibited a half-wave potential (E<inf>1/2</inf>) of 0.812 V<inf>RHE</inf> for the oxygen reduction reaction (ORR) in 0.1 M HClO<inf>4</inf>. The porous structure of the Fe–N–C cathode catalyst layer (NCFe-CCL) provided a pore volume of 0.1051 cm3 g−1 (vs. 0.0 cm3 g−1 for Pt/C-CCL), enabling efficient water retention at 105 °C/20 % RH. Ultimately, the fuel cell incorporating Fe–N–C delivered outstanding performance at 105 °C/20 % RH, reaching peak power densities of 1057 mW cm−2 (H<inf>2</inf>–O<inf>2</inf>). This work demonstrates a synergistic design strategy to boost both ORR activity and water retention capability in non-precious metal catalysts, facilitating their deployment in elevated temperature (>100 °C), low-humidity PEMFC environments. © 2025 Elsevier Ltd",Fe–N–C catalyst; Low-humidity; Medium-temperature; Oxygen reduction reaction; PEMFCs; Water retention,Catalyst activity; Chlorine compounds; Electrolytic reduction; Gas fuel purification; Hydration; Iron compounds; Oxygen reduction reaction; Reaction kinetics; Active site density; Catalysts layers; Fe–N–C catalyst; Li +; Low humidity; Medium temperature; Proton-exchange membranes fuel cells; Water retention; ]+ catalyst; Proton exchange membrane fuel cells (PEMFC),Fe–N–C catalyst;Low-humidity;Medium-temperature;Oxygen reduction reaction;PEMFCs;Water retention;Catalyst activity;Chlorine compounds;Electrolytic reduction;Gas fuel purification;Hydration;Iron compounds;Reaction kinetics;Active site density;Catalysts layers;Li +;Low humidity;Medium temperature;Proton-exchange membranes fuel cells;]+ catalyst;Proton exchange membrane fuel cells (PEMFC),"L. Wang; State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300072, China; email: lianqin.wang@outlook.com; J. Zhang; State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300072, China; email: geosign@tju.edu.cn",,,,,,Elsevier Ltd,00086223,,CRBNA,,English,Carbon,Article,Scopus,,2-s2.0-105014245241,,China,outlook.com,,,"Yin, Y.; Zhou, X.; Liu, H.; Guan, C.; Zhu, M.; Wang, L.; Zhang, J."
"Liang, Y., Zhang, H.C., Zhang, J., Cheng, X., Zhu, Y.L., Luo, L.M., Lu, S.F., Wei, J., Wang, H.T.",Porous 2D carbon nanosheets synthesized via organic groups triggered polymer particles exfoliation: An effective cathode catalyst for polymer electrolyte membrane fuel cells,2020,ELECTROCHIMICA ACTA,332,,135397,,,10,11,10.1016/j.electacta.2019.135397,,"[Liang, Yan; Zhang, Huacheng; Zhu, Yinlong; Wang, Huanting] Monash Univ, Chem Engn, Clayton, Vic 3800, Australia; [Cheng, Xuan] Monash Ctr Electron Microscopy, Clayton, Vic 3166, Australia; [Zhang, Jin; Luo, Laiming; Lu, Shanfu] Beihang Univ, Beijing Key Lab Bioinspired Energy Mat & Devices, Beijing 100191, Peoples R China; [Zhang, Jin; Luo, Laiming; Lu, Shanfu] Beihang Univ, Sch Space & Environm, Beijing 100191, Peoples R China; [Wei, Jing] Xi An Jiao Tong Univ, Sch Life Sci & Technol, Xian 710049, Shanxi, Peoples R China",,"The synthesis of two-dimensional (2D) porous carbon materials has attracted much attention due to their widespread applications. In this work, Fe/N doped hierarchical porous carbon nanosheets are developed through thermal activation step based on organic groups triggered polymer particles exfoliation. Polymer nanoparticles are exfoliated by the reaction between the phenolic hydroxyl groups and the amino groups. The gas produced from dicyandiamide then blows polymer fragments into ultrathin flexible carbon nanosheets under pyrolysis process, along with nitrogen doping. The Fe-N-C catalyst exhibits half-wave potential (E-1/2) at 0.852 V (vs. RHE) in 0.1 M KOH and at 0.686 V (vs. RHE) in 0.5 M H2SO4 for oxygen reduction reaction. Additionally, the polymer electrolyte membrane fuel cell that employs the catalyst at the cathode exhibits good durability without showing significant degradation after 96 h continuous operation. Furthermore, this method can be generalized to synthesize carbon nanosheets by using various polymer precursors. This work provides a new and general strategy for preparing porous carbon or metal/carbon nanosheets, which paves the way for the mass production of effective 2D carbon materials in many important applications. (C) 2019 Elsevier Ltd. All rights reserved.",Carbon; Porous structure; Electrocatalysts; 2D material; Fuel cell,OXYGEN REDUCTION; NITRIDE NANOSHEETS; GRAPHENE OXIDE; ACTIVE-SITES; ELECTROCATALYSTS; IRON; NANOTUBES; FRAMEWORKS; PROGRESS; COBALT,Carbon;Porous structure;Electrocatalysts;2D material;Fuel cell;OXYGEN REDUCTION;NITRIDE NANOSHEETS;GRAPHENE OXIDE;ACTIVE-SITES;IRON;NANOTUBES;FRAMEWORKS;PROGRESS;COBALT,zhangjin1@buaa.edu.cn; huanting.wang@monash.edu,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000506201800009,2-s2.0-85076255972,Australia;China,buaa.edu.cn,Monash Univ;Monash Ctr Electron Microscopy;Beihang Univ;Xi An Jiao Tong Univ,"Monash Univ, Australia;Monash Ctr Electron Microscopy, Australia;Beihang Univ, China;Xi An Jiao Tong Univ, China","Liang, Yan; Zhang, Huacheng; Zhang, Jin; Cheng, Xuan; Zhu, Yinlong; Luo, Laiming; Lu, Shanfu; Wei, Jing; Wang, Huanting"
"Ricciardi, B., Mecheri, B., da Silva Freitas, W., Ficca, V.C.A., Placidi, E., Gatto, I., Carbone, A., Capasso, A., D'Epifanio, A.",Porous Iron-Nitrogen-Carbon Electrocatalysts for Anion Exchange Membrane Fuel Cells (AEMFC),2023,ChemElectroChem,10,7,e202201115,,,,23,10.1002/celc.202201115,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85150712067&doi=10.1002%2Fcelc.202201115&partnerID=40&md5=e5f87b7bd7a33edbe446447838c45698,"Department of Chemical Science and Technologies, Università degli Studi di Roma ""Tor Vergata"", Rome, RM, Italy; Department of Physics, Sapienza Università di Roma, Rome, RM, Italy; Istituto Di Tecnologie Avanzate Per L'energia, Messina, Messina, ME, Italy; International Iberian Nanotechnology Laboratory, Braga, Minho, Portugal","Ricciardi, Beatrice, Department of Chemical Science and Technologies, Università degli Studi di Roma ""Tor Vergata"", Rome, RM, Italy; Mecheri, Barbara, Department of Chemical Science and Technologies, Università degli Studi di Roma ""Tor Vergata"", Rome, RM, Italy; da Silva Freitas, Williane, Department of Chemical Science and Technologies, Università degli Studi di Roma ""Tor Vergata"", Rome, RM, Italy; Ficca, Valerio C.A., Department of Physics, Sapienza Università di Roma, Rome, RM, Italy; Placidi, Ernesto, Department of Physics, Sapienza Università di Roma, Rome, RM, Italy; Gatto, Irene, Istituto Di Tecnologie Avanzate Per L'energia, Messina, Messina, ME, Italy; Carbone, Alessandra, Istituto Di Tecnologie Avanzate Per L'energia, Messina, Messina, ME, Italy; Capasso, Andrea, International Iberian Nanotechnology Laboratory, Braga, Minho, Portugal; D'Epifanio, Alessandra, Department of Chemical Science and Technologies, Università degli Studi di Roma ""Tor Vergata"", Rome, RM, Italy","High-performance platinum group metal-free (PGM-free) electrocatalysts were prepared from porous organic polymers (POPs) precursors with highly-porous structures and adjustable surface area. A resin phenol-melamine-based POP and an iron salt were used to synthesize Fe−N−C catalysts with different iron contents (0.2–1.3 wt.%). Electrochemical and spectroscopical characterization allowed us to elucidate the effect of Fe content on the material's structure, surface chemistry, and electrocatalytic activity toward the oxygen reduction reaction (ORR). The increase of iron content led to a specific surface area decrease, preserving the morphological structure, with the formation of highly-active catalytic sites, as indicated by X-ray photoelectron spectroscopy (XPS) analysis. The rotating ring disk electrode experiments, performed at pH=13, confirmed the high ORR activity of both 0.5 Fe (E<inf>1/2</inf>=0.84 V) and 1.3 Fe (E<inf>1/2</inf>=0.83 V) catalysts, which were assembled at the cathode of a H<inf>2</inf>-fed anion exchange membrane fuel cells (AEMFC) equipped with a FAA-3-50 membrane, evidencing promising performance (0.5 Fe, maximum power density, Max PD=69 mA cm−2 and 1.3 Fe, Max PD=87 mA cm−2) with further advancement prospects. © 2023 The Authors. ChemElectroChem published by Wiley-VCH GmbH.",alkaline fuel cells; Fe−Nx−C active sites; mesoporous carbon; oxygen reduction reaction; platinum group metal-free electrocatalysts,Alkaline fuel cells; Alkalinity; Carbon; Electrodes; Electrolysis; Electrolytic reduction; Ion exchange membranes; Iron; Nitrogen; Oxygen; Platinum; Proton exchange membrane fuel cells (PEMFC); X ray photoelectron spectroscopy; Active site; Anion-exchange membrane fuel cells; Fe−Nx−C active site; Mesoporous carbon; Metal-free electrocatalysts; Oxygen reduction reaction; Performance; Platinum group metal-free electrocatalyst; Platinum group metals; Porous organic polymers; Electrocatalysts,alkaline fuel cells;Fe−Nx−C active sites;mesoporous carbon;oxygen reduction reaction;platinum group metal-free electrocatalysts;Alkalinity;Carbon;Electrodes;Electrolysis;Electrolytic reduction;Ion exchange membranes;Iron;Nitrogen;Oxygen;Platinum;Proton exchange membrane fuel cells (PEMFC);X ray photoelectron spectroscopy;Active site;Anion-exchange membrane fuel cells;Fe−Nx−C active site;Metal-free electrocatalysts;Performance;Platinum group metal-free electrocatalyst;Platinum group metals;Porous organic polymers;Electrocatalysts,"B. Mecheri; Department of Chemical Science and Technologies, University of Rome Tor Vergata, Rome, Via della Ricerca Scientifica, 00133, Italy; email: barbara.mecheri@uniroma2.it; A. D'Epifanio; Department of Chemical Science and Technologies, University of Rome Tor Vergata, Rome, Via della Ricerca Scientifica, 00133, Italy; email: alessandra.d.epifanio@uniroma2.it",,,,,,John Wiley and Sons Inc,,,,,English,ChemElectroChem,Article,Scopus,,2-s2.0-85150712067,,Italy;Portugal,uniroma2.it,,,"Ricciardi, B.; Mecheri, B.; da Silva Freitas, W.; Ficca, V.C.A.; Placidi, E.; Gatto, I.; Carbone, A.; Capasso, A.; D'Epifanio, A."
"Zhu, Y., Xu, B., Han, C., Ma, Q., Chen, Z.",Potential correlation between thermal transport and catalytic performance in single metal atom catalysts: A machine-learning interatomic potential and density functional theory study,2025,Surfaces and Interfaces,56,,105594,,,,1,10.1016/j.surfin.2024.105594,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85211089806&doi=10.1016%2Fj.surfin.2024.105594&partnerID=40&md5=6141afc19e6ee0d6558e3ced814f08cb,"School of Energy and Environment, Southeast University, Nanjing, Jiangsu, China; Key Lab of Energy Thermal Conversion and Control, Ministry of Education, Nanjing, Jiangsu, China; Southeast University, Nanjing, Jiangsu, China; College of Emergency Management, Nanjing Tech University, Nanjing, Jiangsu, China; Jiangsu University, Zhenjiang, Jiangsu, China","Zhu, Yuxi, School of Energy and Environment, Southeast University, Nanjing, Jiangsu, China; Xu, Bo, School of Energy and Environment, Southeast University, Nanjing, Jiangsu, China; Han, Chaoling, College of Emergency Management, Nanjing Tech University, Nanjing, Jiangsu, China; Ma, Qiang, Jiangsu University, Zhenjiang, Jiangsu, China; Chen, Zhenqian, School of Energy and Environment, Southeast University, Nanjing, Jiangsu, China, Key Lab of Energy Thermal Conversion and Control, Ministry of Education, Nanjing, Jiangsu, China, Southeast University, Nanjing, Jiangsu, China","Based on the thermal management requirements, it is meaningful to explore the thermal properties of non-precious metal catalysts for PEMFC. In this paper, the thermal properties of single metal doped N coordinated graphene catalysts are investigated for the first time by solving the Boltzmann transport equation (BTE) using density functional theory (DFT) and machine-learning interatomic potential (MLIP). It is found that the single metal atom catalysts exhibit the promising thermal conductivities, although they show the anisotropic thermal conductivities. The thermal conductivity is mainly contributed by the middle and low frequency phonons (0–30 THz), and >70 % of the thermal conductivity can be obtained when the calculated size is 2.64–15.75 % of the maximum mean free path. In general, the average lattice thermal conductivities of G-FeN<inf>4</inf>, G-CoN<inf>4</inf> and G-NiN<inf>4</inf> at 300 K are 88.61 W/mK, 205.32 W/mK and 210.57 W/mK, respectively. While G-MnN<inf>4</inf>, G-CuN<inf>4</inf> and G-ZnN<inf>4</inf> show relatively low thermal conductivity due to their low phonon lifetime and large scattering strength. The exponential function is proposed to be more consistent with the relationship between thermal conductivity and temperature by establishing quadratic and exponential functions. The single metal atom catalysts exhibit the excellent electronic property, with the values of 0.15–0.24 × 1019 Ω-1m-1s-1. Finally, the correlation between thermal conductivity and catalytic performance bridged by the electronegativity of doped atoms is revealed. © 2024",Density functional theory; Machine-learning interatomic potential; Proton exchange membrane fuel cell; Single metal atom catalysts; Thermal conductivity,,Density functional theory;Machine-learning interatomic potential;Proton exchange membrane fuel cell;Single metal atom catalysts;Thermal conductivity,"Z. Chen; School of Energy and Environment, Southeast University, Nanjing, 210096, China; email: zqchen@seu.edu.cn",,,,,,Elsevier B.V.,24680230,,,,English,Surf. Interfaces,Article,Scopus,,2-s2.0-85211089806,,China,seu.edu.cn,,,"Zhu, Y.; Xu, B.; Han, C.; Ma, Q.; Chen, Z."
"Kreider, M.E., Gallo, A., Back, S., Liu, Y., Siahrostami, S., Nordlund, D., Sinclair, R., N.Orskov, J.K., King, L.A., Jaramillo, T.F.",Precious Metal-Free Nickel Nitride Catalyst for the Oxygen Reduction Reaction,2019,ACS Applied Materials and Interfaces,11,30,,26863,26871,,110,10.1021/acsami.9b07116,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85070553367&doi=10.1021%2Facsami.9b07116&partnerID=40&md5=48f94f0d01aa268eb091b7f0858aa6c5,"Stanford Engineering, Stanford, CA, United States; SUNCAT Center for Interface Science and Catalysis, Stanford, CA, United States; Stanford Synchrotron Radiation Lightsource, Menlo Park, CA, United States; College of Engineering, Pittsburgh, PA, United States; Stanford Engineering, Stanford, CA, United States; Department of Chemistry, University of Calgary, Calgary, AB, Canada; Technical University of Denmark, Lyngby, Hovedstaden, Denmark","Kreider, Melissa E., Stanford Engineering, Stanford, CA, United States; Gallo, Alessandro, Stanford Engineering, Stanford, CA, United States, SUNCAT Center for Interface Science and Catalysis, Stanford, CA, United States, Stanford Synchrotron Radiation Lightsource, Menlo Park, CA, United States; Back, Seoin, Stanford Engineering, Stanford, CA, United States, College of Engineering, Pittsburgh, PA, United States; Liu, Yunzhi, Stanford Engineering, Stanford, CA, United States; Siahrostami, Samira, Stanford Engineering, Stanford, CA, United States, Department of Chemistry, University of Calgary, Calgary, AB, Canada; Nordlund, Dennis L., SUNCAT Center for Interface Science and Catalysis, Stanford, CA, United States; Sinclair, Robert A., Stanford Engineering, Stanford, CA, United States; NØrskov, Jens Kehlet, Stanford Engineering, Stanford, CA, United States, SUNCAT Center for Interface Science and Catalysis, Stanford, CA, United States, Technical University of Denmark, Lyngby, Hovedstaden, Denmark; King, Laurie A., Stanford Engineering, Stanford, CA, United States; Jaramillo, Thomas Francisco, Stanford Engineering, Stanford, CA, United States, SUNCAT Center for Interface Science and Catalysis, Stanford, CA, United States","With promising activity and stability for the oxygen reduction reaction (ORR), transition metal nitrides are an interesting class of non-platinum group catalysts for polymer electrolyte membrane fuel cells. Here, we report an active thin-film nickel nitride catalyst synthesized through a reactive sputtering method. In rotating disk electrode testing in a 0.1 M HClO<inf>4</inf> electrolyte, the crystalline nickel nitride film achieved high activity and selectivity to four-electron ORR. It also exhibited good stability during 10 and 40 h chronoamperometry measurements in acid and alkaline electrolyte, respectively. A combined experiment-theory approach, with detailed ex situ materials characterization and density functional theory calculations, provides insight into the structure of the catalyst and its surface during catalysis. Design strategies for activity and stability improvement through alloying and nanostructuring are discussed. © 2019 American Chemical Society.",density functional theory; electrocatalysis; nonprecious metal catalysts; oxygen reduction reaction; reactive sputter deposition; transition metal nitrides,Catalysis; Catalysts; Chlorine compounds; Chronoamperometry; Electrocatalysis; Electrolytic reduction; Nickel compounds; Nitrides; Oxygen; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Reactive sputtering; Refractory metal compounds; Rotating disks; Solid electrolytes; Transition metals; Alkaline electrolytes; Materials characterization; Non-precious metal catalysts; Oxygen reduction reaction; Reactive sputtering method; Rotating disk electrodes; Stability improvement; Transition metal nitrides; Density functional theory,density functional theory;electrocatalysis;nonprecious metal catalysts;oxygen reduction reaction;reactive sputter deposition;transition metal nitrides;Catalysis;Catalysts;Chlorine compounds;Chronoamperometry;Electrolytic reduction;Nickel compounds;Nitrides;Oxygen;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Reactive sputtering;Refractory metal compounds;Rotating disks;Solid electrolytes;Transition metals;Alkaline electrolytes;Materials characterization;Non-precious metal catalysts;Reactive sputtering method;Rotating disk electrodes;Stability improvement,"L.A. King; Department of Chemical Engineering, Stanford University, Stanford, 443 Via Ortega, 94305, United States; email: lking10@stanford.edu",,,,,,American Chemical Society service@acs.org,19448244,,,31310093,English,ACS Appl. Mater. Interfaces,Article,Scopus,,2-s2.0-85070553367,,United States;Canada;Denmark,stanford.edu,,,"Kreider, M.E.; Gallo, A.; Back, S.; Liu, Y.; Siahrostami, S.; Nordlund, D.; Sinclair, R.; NOrskov, J.K.; King, L.A.; Jaramillo, T.F."
"Huang, M., Wu, H., Hu, M., Yao, Z.",Preparation and ORR performance of nitrogen doped carbon supported hollow cubic iron catalyst; 氮掺杂碳负载空心立方铁催化剂制备及其氧还原反应性能,2025,Gongneng Cailiao/Journal of Functional Materials,56,8,,8164,8178,,0,10.3969/j.issn.1001-9731.2025.08.022,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105014962881&doi=10.3969%2Fj.issn.1001-9731.2025.08.022&partnerID=40&md5=e48dd8fb7ebc8276a2c37f8445618a33,"School of Optoelectronic Materials and Technology, Jianghan University, Wuhan, Hubei, China","Huang, Meijia, School of Optoelectronic Materials and Technology, Jianghan University, Wuhan, Hubei, China; Wu, Haiyi, School of Optoelectronic Materials and Technology, Jianghan University, Wuhan, Hubei, China; Hu, Maocong, School of Optoelectronic Materials and Technology, Jianghan University, Wuhan, Hubei, China; Yao, Zhenhua, School of Optoelectronic Materials and Technology, Jianghan University, Wuhan, Hubei, China","As the prospective catalyst for oxygen reduction (ORR) in proton exchange membrane fuel cells (PEMFCs), Fe/N-C catalyst has been widely studied because of its high ORR activity and low cost. In this paper, Fe/N-C catalyst was synthesized by using gelatin which is a biomass material as precursor. Using in-situ doping method, gelatin was mixed with Fe(NO3)3·9H2O and heated, freeze drying to remove water and pyrolysising at three different temperatures to obtain the catalyst. TEM indicated that the catalyst showed a typical hollow stereo-structure. Among them, the catalyst pyrolysis at 900 ℃ achieved a current density of -3.87 mA/cm2 and a reaction path of 4 electrons, which showed more significant stability and better ORR activity than the catalysts pyrolysis at the other two temperatures, and had better methanol resistance and stability. This study provides a new idea for preparing Fe/N-C catalyst. © 2025 Journal of Functional Materials. All rights reserved.",nitrogen doped carbon; oxygen reduction reaction; proton exchange membrane fuel cell; single metal catalyst,,nitrogen doped carbon;oxygen reduction reaction;proton exchange membrane fuel cell;single metal catalyst,"Z. Yao; School of Optoelectronic Materials and Technology, Jianghan University, Wuhan, 430000, China; email: zhenhua.yao@jhun.edu.cn",,,,,,Journal of Functional Materials,10019731,,GOCAE,,Chinese,Gongneng Cailiao,Article,Scopus,,2-s2.0-105014962881,,China,jhun.edu.cn,,,"Huang, M.; Wu, H.; Hu, M.; Yao, Z."
"Xiong, Z.P., Si, Y.J., Li, M.J., Liu, X.L.",Preparation and Performance of a Non-Precious Metal Catalyst CoMe/C for Oxygen Reduction Reaction from Modified Carbon Black Using Melamine as Nitrogen Source,2014,INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE,9,12,,7736,7745,10,2,,,"[Xiong, Zhongping; Si, Yujun; Li, Minjiao; Liu, Xinlu] Sichuan Univ Sci & Engn, Coll Chem & Pharmaceut Engn, Zigong 643000, Peoples R China",,"A non-precious metal catalyst for oxygen reduction reaction is prepared by heat-treating a precursor containing acetylene black, melamine and cobalt chloride. The result shows that the method is effective, and a best catalyst can be obtained by heat-treating the precursor at 600 degrees C for 2 hours. In heat-treating, the cobalt ion is reduced to metallic beta-cobalt and the metallic cobalt simultaneously facilitates the nitrogen source reacting with acetylene black to form the active sites to oxygen reduction reaction. The nitrogen source can also react with acetylene black to prepare a metal-free catalyst without the existence of cobalt at a higher temperature, but the activity of resulted catalyst is worse.",Oxygen reduction reaction; electrocatalyst; carbon-based; preparation,PEM FUEL-CELLS; O-2 REDUCTION; ACTIVE-SITES; COMPOSITE CATALYST; HIGH-TEMPERATURE; ELECTROCATALYSTS; POLYMER; PYROLYSIS; COBALT; N/C,Oxygen reduction reaction;electrocatalyst;carbon-based;preparation;PEM FUEL-CELLS;O-2 REDUCTION;ACTIVE-SITES;COMPOSITE CATALYST;HIGH-TEMPERATURE;ELECTROCATALYSTS;POLYMER;PYROLYSIS;COBALT;N/C,syj08448@163.com,,"BORIVOJA STEVANOVICA 25-7, BELGRADE, 11000, SERBIA",,,,ESG,1452-3981,,,,English,INT J ELECTROCHEM SC,Article,WoS,Electrochemistry,WOS:000345261900080,,China,163.com,Sichuan Univ Sci & Engn,"Sichuan Univ Sci & Engn, China","Xiong, Zhongping; Si, Yujun; Li, Minjiao; Liu, Xinlu"
"Li, Y., Rong, W.Q.",Preparation and study of CoFe2O4 catalyst co-doped with nitrogen and carbon for oxygen reduction reaction; 氮碳共掺杂CoFe2O4氧还原催化剂制备及研究,2020,Huaxue Gongcheng/Chemical Engineering (China),48,10,,29,33,,0,10.3969/j.issn.1005-9954.2020.10.006,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85102838710&doi=10.3969%2Fj.issn.1005-9954.2020.10.006&partnerID=40&md5=f3acfc7c48b757789aed42c8a352c9bf,"Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong, China; Quality Control Department, Tianjin Drug Research Institute Co., Ltd., Tianjin, China","Li, Ying, Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong, China; Rong, Wanqi, Quality Control Department, Tianjin Drug Research Institute Co., Ltd., Tianjin, China","Traditional alkaline polymer electrolyte membrane fuel cell catalysts usually use noble metals such as platinum and rhodium. However, the application is limited due to the high price of the catalyst. In order to solve this problem, the ultrafine CoFe<inf>2</inf>O<inf>4</inf> powder was synthesized with microwave method and the CoFe<inf>2</inf>O<inf>4</inf> was in situ composite with polyaniline at a high temperature. The CoFe<inf>2</inf>O<inf>4</inf> catalysts co-doped with nitrogen and carbon were prepared with different contents of CoFe<inf>2</inf>O<inf>4</inf> at different calcination temperatures. The catalysts had a high chemical activity and can be used as a cathode non-noble metal catalyst for alkaline polymer electrolyte membrane fuel cell. LSV indicated that both the calcination temperature and the content of CoFe<inf>2</inf>O<inf>4</inf> affected the chemical activity. The catalyst with 5% CoFe<inf>2</inf>O<inf>4</inf> prepared at 1 000 ℃ had the optimal catalytic activity, and the initial oxygen reduction potential was 0.88 V. Raman and XPS indicated that the optimal catalyst contained more surface-deficient carbon atoms and graphite nitrogen than the rest catalysts, which was an significant factor that led to the best catalytic activity. © 2020, Editorial Office of ""CHEMICAL ENGINEERING"" (CHINA). All right reserved.",CoFe2O4 co-doped with nitrogen and carbon; Graphitic; Non-precious metal catalysts; Oxygen reduction reaction; Surface-deficient carbon,,CoFe2O4 co-doped with nitrogen and carbon;Graphitic;Non-precious metal catalysts;Oxygen reduction reaction;Surface-deficient carbon,"W.-Q. Rong; Quality Control Department, Tianjin Jialin Pharmaceutical Co., Ltd., Tianjin, 300000, China; email: rongwanqi@163.com",,,,,,Editorial Office of Chemical Engineering (China),10059954,,HUGOE,,Chinese,Huaxue Gongcheng Chem. Eng.,Article,Scopus,,2-s2.0-85102838710,,China,163.com,,,"Li, Y.; Rong, W.-Q."
"Chokai, M., Nabae, Y., Kuroki, S., Hayakawa, T., Kakimoto, M.A., Miyata, S.",Preparation of carbon-based catalysts from nitrogen-containing aromatic polymers,2011,ECS Transactions,41,1,,1215,1223,,0,10.1149/1.3635654,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84866410102&doi=10.1149%2F1.3635654&partnerID=40&md5=1b829e1dd9bd2e60140f93f7152dc6c7,"Department of Organic and Polymeric Materials, Institute of Science Tokyo, Tokyo, Japan; Integrative Technology Research Institute, Teijin Ltd., Hino, Tokyo, Japan","Chokai, Masayuki, Department of Organic and Polymeric Materials, Institute of Science Tokyo, Tokyo, Japan, Integrative Technology Research Institute, Teijin Ltd., Hino, Tokyo, Japan; Nabae, Yuta, Department of Organic and Polymeric Materials, Institute of Science Tokyo, Tokyo, Japan; Kuroki, Shigeki, Department of Organic and Polymeric Materials, Institute of Science Tokyo, Tokyo, Japan; Hayakawa, Teruaki, Department of Organic and Polymeric Materials, Institute of Science Tokyo, Tokyo, Japan; Kakimoto, M. A., Department of Organic and Polymeric Materials, Institute of Science Tokyo, Tokyo, Japan; Miyata, Seizo, Department of Organic and Polymeric Materials, Institute of Science Tokyo, Tokyo, Japan","Carbon-based, non-precious-metal catalysts for the oxygen reduction reaction were prepared from polyimides, polyamides, and azoles, by pyrolysis at 900°C under flowing N<inf>2</inf>. The catalytic activity for electrochemical oxygen reduction was evaluated by the onset potential, measured at a current density of -2 μA cm-2. Pyrolyzed polymers with high N content showed higher onset potentials. In particular, one catalyst derived from azole (Az5) had an onset potential of 0.82 V, despite being prepared without the use of any metals. Additionally, a catalyst prepared by multistep pyrolysis of polyamide mixed with FeCl<inf>2</inf> had high N content and high oxygen reduction activity, with an onset potential of 0.95 V. A membrane electrode assembly prepared using this catalyst had an open circuit voltage of 0.99 V, and a maximum output of 0.48 W cm-2. © 2011 ECS-The Electrochemical Society.",,Aromatic polymers; Carbon; Catalyst activity; Chlorine compounds; Electrolytic reduction; Iron compounds; Nitrogen; Open circuit voltage; Oxygen; Oxygen reduction reaction; Proton exchange membrane fuel cells (PEMFC); Pyrolysis; Solid electrolytes; Carbon based catalysts; Electrochemical oxygen reduction; High oxygens; Maximum output; Membrane electrode assemblies; Non-precious metal catalysts; Onset potential; Pyrolyzed polymers; Polyelectrolytes,Aromatic polymers;Carbon;Catalyst activity;Chlorine compounds;Electrolytic reduction;Iron compounds;Nitrogen;Open circuit voltage;Oxygen;Oxygen reduction reaction;Proton exchange membrane fuel cells (PEMFC);Pyrolysis;Solid electrolytes;Carbon based catalysts;Electrochemical oxygen reduction;High oxygens;Maximum output;Membrane electrode assemblies;Non-precious metal catalysts;Onset potential;Pyrolyzed polymers;Polyelectrolytes,,,,"11th Polymer Electrolyte Fuel Cell Symposium, PEFC 11 - 220th ECS Meeting",,,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-84866410102,,Japan,No email,,,"Chokai, M.; Nabae, Y.; Kuroki, S.; Hayakawa, T.; Kakimoto, M.-A.; Miyata, S."
"Li, Y.C., Liu, X.F., Zheng, L.R., Shang, J.X., Wan, X., Hu, R.M., Guo, X., Hong, S., Shui, J.L.","Preparation of Fe-N-C catalysts with FeNx (x=1, 3, 4) active sites and comparison of their activities for the oxygen reduction reaction and performances in proton exchange membrane fuel cells",2019,JOURNAL OF MATERIALS CHEMISTRY A,7,45,,26147,26153,7,231,10.1039/c9ta08532g,,"[Li, Yongcheng; Liu, Xiaofang; Shang, Jiaxiang; Wan, Xin; Hu, Riming; Guo, Xu; Shui, Jianglan] Beihang Univ, Sch Mat Sci & Engn, 37 Xueyuan Rd, Beijing 100083, Peoples R China; [Zheng, Lirong] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, 19 Yuquan Rd, Beijing 100049, Peoples R China; [Hong, Song] Beijing Key Lab Electrochem Proc & Technol Mat, State Key Lab Chem Resources Engn, Beijing, Peoples R China",,"The active sites of Fe-N-C catalysts are nitrogen coordinated iron atoms, FeNx (x = 1-5), that have five possible coordination numbers. FeN4 active sites are commonly reported, but active sites with other coordination numbers are rarely prepared and compared with FeN4 for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). Herein, Fe-N-C catalysts with different coordination numbers but similar active site densities are synthesized. Combined with theoretical calculations, the effects of FeNx coordination number x on the ORR activity and PEMFC performance are systematically investigated. It is found that the annealing temperature is the key to tailoring the coordination number of FeNx. The ORR activity and PEMFC performance follow the order FeN4 > FeN3 > FeN1. FeN4 delivers almost 1.7x and 2.9x peak power densities, and 2x and 14x current densities (at 0.7 V) compared with FeN3 and FeN1, respectively. Theoretical calculations demonstrate an ""inverted volcano"" relationship for the formation energy and a ""volcano"" relationship for the ORR activity as a function of coordination number x = 1-5. FeN4 was proved to have the lowest formation energy, the highest ORR activity and the best PEMFC performance among the five types of FeNx (x = 1-5). This research provides a deep insight into the differences among FeNx active sites of Fe-N-C catalysts.",,EFFICIENT ELECTROREDUCTION; CARBON NANOTUBES; ELECTROCATALYST; GRAPHENE; ORR; FRAMEWORKS; ATOMS,EFFICIENT ELECTROREDUCTION;CARBON NANOTUBES;ELECTROCATALYST;GRAPHENE;ORR;FRAMEWORKS;ATOMS,shangjx@buaa.edu.cn; shuijianglan@buaa.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000509471800043,2-s2.0-85075267829,China,buaa.edu.cn,Beihang Univ;Chinese Acad Sci;Beijing Key Lab Electrochem Proc & Technol Mat,"Beihang Univ, China;Chinese Acad Sci, China;Beijing Key Lab Electrochem Proc & Technol Mat, China","Li, Yongcheng; Liu, Xiaofang; Zheng, Lirong; Shang, Jiaxiang; Wan, Xin; Hu, Riming; Guo, Xu; Hong, Song; Shui, Jianglan"
"Jia, X., Yang, B., Cheng, Q., Li, X., Xiang, Z.",Preparation of high-efficiency iron-cobalt bimetallic site oxygen reduction electrocatalysts by step-by-step metal loading method; 分步负载金属法制备铁钴双金属位点高效氧还原电催化剂,2024,Huagong Xuebao/CIESC Journal,75,4,,1578,1593,,0,10.11949/0438-1157.20240073,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85198048752&doi=10.11949%2F0438-1157.20240073&partnerID=40&md5=76f37ca3854be4f19bb5f637f0dff65a,"State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China","Jia, Xudong, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Yang, Bolong, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Cheng, Qian, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Li, Xueli, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Xiang, Zhonghua, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China","Transition metals and nitrogen-doped carbon (M-N-C) have risen to prominence as alternatives to platinum-based catalysts, acclaimed for their superior electrocatalytic activity and comparatively lower production costs. However, current M-N-C catalysts usually involve a combination of metal salts, nitrogen-containing substances and carbon supports. The resulting catalysts after heat treatment and acid washing processes lack sufficient performance in terms of active site density and mass transfer capacity. In this paper, Fe, Co bimetallic doped M-N-C catalysts were prepared by step-by-step metal loading method. Taking advantage of the competitive effect of Zn2+ and Co2+ , a small-sized and uniform Zn-Co-ZIFs bimetallic zeolite imidazole framework was successfully synthesized. Subsequently, the maximum number of Fe atoms is embedded into the C-Zn-Co-ZIFs-H+ precursor structure without forming metal clusters, so that it can generate a large number of FeCo—N<inf>x</inf> active sites after pyrolysis. This refinement engenders a substantial augmentation in the Fe active site content of the FeCo-NC-2 catalyst (1.9%, mass fraction), and a profound optimization of its microporous and mesoporous architecture (860 m2·g-1), culminating in enhanced electrochemical activity and stability. The catalyst exhibited half-wave potentials (E<inf>1/2</inf>) for oxygen reduction reaction (ORR) of 0.806 V in 0.1 mol·L-1 HClO<inf>4</inf> and 0.921 V in 0.1 mol·L-1 KOH, maintaining 91.21% and 95.32% of its activity respectively after 50000, 45000 s of a constant voltage test. Moreover, this catalyst has achieved peak power densities of 746 mW·cm-2 in proton exchange membrane fuel cells (PEMFCs) and 164 mW·cm-2 in alkaline zinc-air flow batteries (ZAFBs), demonstrating its superior performance. © 2024 Materials China. All rights reserved.",catalyst; electrochemistry; fuel cells; iron and cobalt-based dual-metalsite; oxygen reduction reaction; step-by-step metal loading method; zinc-air flow batteries,Air; Carbon; Catalyst activity; Chlorine compounds; Cobalt; Doping (additives); Flow batteries; Iron; Mass transfer; Nitrogen; Oxygen; Potassium hydroxide; Proton exchange membrane fuel cells (PEMFC); Zeolites; Zinc; Zinc air batteries; Air flow; Cobalt-based; Iron and cobalt-based dual-metalsite; Iron-based; Loading methods; Metal loadings; Oxygen reduction reaction; Step-by-step metal loading method; Zinc-air flow battery; ]+ catalyst; Electrolytic reduction,catalyst;electrochemistry;fuel cells;iron and cobalt-based dual-metalsite;oxygen reduction reaction;step-by-step metal loading method;zinc-air flow batteries;Air;Carbon;Catalyst activity;Chlorine compounds;Cobalt;Doping (additives);Flow batteries;Iron;Mass transfer;Nitrogen;Oxygen;Potassium hydroxide;Proton exchange membrane fuel cells (PEMFC);Zeolites;Zinc;Zinc air batteries;Air flow;Cobalt-based;Iron-based;Loading methods;Metal loadings;Zinc-air flow battery;]+ catalyst;Electrolytic reduction,"X. Li; State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China; email: m18810868361@163.com",,,,,,Materials China,04381157,,HUKHA,,Chinese,Huagong Xuebao,Article,Scopus,,2-s2.0-85198048752,,China,163.com,,,"Jia, X.; Yang, B.; Cheng, Q.; Li, X.; Xiang, Z."
"Pimpaya, Y., Konlayutt, P.",Preparation of low cost catalysts for proton exchange membrane fuel cell,2020,INTERNATIONAL CONFERENCE ON SUSTAINABLE ENERGY AND GREEN TECHNOLOGY 2019,463,,012066,,,7,2,10.1088/1755-1315/463/1/012066,,"[Pimpaya, Y.; Konlayutt, P.] Chiang Mai Univ, Dept Mech Engn, Fac Engn, Chiang Mai 50200, Thailand",,"Nitrogen-doped reduced graphene oxide (NG) with high nitrogen level was synthesized by a facile pyrolysis. NG has been getting attention because of its high catalytic activity toward the oxygen reduction reaction (ORR) and reduce cost. The synthesis of NG used graphene oxide (GO) and urea as a N-precursor were dissolved in ethanol. Then the mixture was evaporated by ultrasonic bath for 30 min. The mixture was slurry then was transferred to tube furnace and pyrolyzed at 300 degrees C and 800 degrees C (NG300 and NG800) with heating rate of 2.5 degrees C/min in N-2 atmosphere for 30 min. The morphology and structure of nitrogen doped graphene oxide were investigated by Scanning Electron Microscopy (SEM) and X-ray photoemission spectroscopy (XPS). The XPS spectra of NG indicated that NG300 had the highest intensity of N1S peak among others. Mass of nitrogen of NG300 and NG800 were evaluated and had about 15.5%wt and 6.6%wt, respectively. Furthermore, N spectra at high-resolution was analysed and de-convoluted to three N chemical states of pyridinic-N, pyrrolic-N, and graphitic-N. The electrochemical properties of NG were determined by cyclic voltammetry (CV) and Linear sweep voltammetry (LSV). From the results shown that NG800 catalyst yielded highest electrochemical activity particularly for oxygen reduction reaction (ORR) over GO and NG300. Thus, N atoms doped into the graphene were responsible for the ORR catalytic activity resulting from doping N atoms and provided more density of active sites and conductivity. Moreover, NG can be applied as a supporting material for Non-precious metal group catalysts of fuel cell.",Nitrogen doped reduced graphene oxide; Non-PGM catalysts; PEM fuel cell; ORR activity,GRAPHENE OXIDE,Nitrogen doped reduced graphene oxide;Non-PGM catalysts;PEM fuel cell;ORR activity;GRAPHENE OXIDE,konlayutt.p@cmu.ac.th,"Tong, CW; ChinTsan, W; Huat, BSL; Xiang, X","DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND",International Conference on Sustainable Energy and Green Technology (SEGT),"Bangkok, THAILAND","DEC 11-14, 2019",IOP PUBLISHING LTD,1755-1307,,,,English,IOP C SER EARTH ENV,Proceedings Paper,WoS,Science & Technology - Other Topics; Energy & Fuels,WOS:000562387100066,2-s2.0-85083467246,Thailand,cmu.ac.th,Chiang Mai Univ,"Chiang Mai Univ, Thailand","Pimpaya, Y.; Konlayutt, P."
"Chang, S.T., Hsu, H.C., Huang, H.C., Wang, C.H., Du, H.Y., Chen, L.C., Lee, J.F., Chen, K.H.",Preparation of non-precious metal catalysts for PEMFC cathode from pyrolyzed vitamin B12,2012,International Journal of Hydrogen Energy,37,18,,13755,13762,,24,10.1016/j.ijhydene.2012.03.081,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84865450669&doi=10.1016%2Fj.ijhydene.2012.03.081&partnerID=40&md5=d3057f3051f58be34c464d8faa917691,"Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Academia Sinica Taiwan, Nankang, Taipei, Taiwan; Center for Condensed Matter Sciences, National Taiwan University, Taipei, Taiwan; National Synchrotron Radiation Research Center, Hsinchu, Taiwan","Chang, Suntang, Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Hsu, Hsincheng, Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Huang, Hsin Chih, Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Wang, Chenhao, Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Du, Heyun, Academia Sinica Taiwan, Nankang, Taipei, Taiwan; Chen, Li Chyong, Center for Condensed Matter Sciences, National Taiwan University, Taipei, Taiwan; Lee, Jyefu, National Synchrotron Radiation Research Center, Hsinchu, Taiwan; Chen, Kuei-Hsien, Academia Sinica Taiwan, Nankang, Taipei, Taiwan, Center for Condensed Matter Sciences, National Taiwan University, Taipei, Taiwan","In this study, the effect of non-precious metal catalysts in the form of pyrolyzed Vitamin B12 that is supported by carbon black on oxygen reduction reaction (ORR) is examined. Pyrolysis was carried out at temperatures of 300 °C (py-B12/C-300), 500 °C (py-B12/C-500), 700 °C (py-B12/C-700) and 900 °C (py-B12/C-900) in an N <inf>2</inf>-atmosphere. The ring-rotating disk electrode technique revealed that the electron-transfer numbers of py-B12/C-300, py-B12/C-500, py-B12/C-700 and py-B12/C-900 are 3.02, 3.42, 3.90 and 3.57, respectively: py-B12/C-700 exhibits near four-electron transfer. The X-ray absorption spectra demonstrate that during the pyrolysis, as the Co oxidation state of py-B12-700 is changed from Co(III) to Co(II), the Co coordination number changes from 6 to 4, suggesting that the structure is a square-planar Co-N <inf>4</inf> chelate. However, the Co-N <inf>4</inf> chelate is decomposed as the pyrolysis temperature increases to 900 °C, resulting in a loss of ORR activity. The H <inf>2</inf>-O <inf>2</inf> PEMFC that uses py-B12/C-700 provides excellent performance, substantially outperforming py-CoTMPP/C. Highlights: We use vitamin B12-based catalysts for the substitution of Pt in a PEMFC. Vitamin B12-based catalysts pyrolyzed at 700 °C reveal high ORR activity. The square-planar Co-N <inf>4</inf> chelate is responsible for enhancing ORR activity. Vitamin B12-based catalysts are superior to porphyrin catalysts used in PEMFC. © 2012 Hydrogen Energy Publications, LLC.",Fuel cells; Non-precious metal catalyst; Oxygen reduction reaction; Vitamin B12,Co oxidation; Coordination number; Disk electrode; Electron-transfer; Excellent performance; Non-precious metal catalysts; Oxygen reduction reaction; PEMFC cathode; Pyrolysis temperature; Vitamin B12; X-ray absorption spectrum; Carbon black; Chelation; Electrolytic reduction; Electromagnetic wave absorption; Fuel cells; Platinum; Porphyrins; Precious metals; Proton exchange membrane fuel cells (PEMFC); Pyrolysis; Rotating disks; Catalysts,Fuel cells;Non-precious metal catalyst;Oxygen reduction reaction;Vitamin B12;Co oxidation;Coordination number;Disk electrode;Electron-transfer;Excellent performance;Non-precious metal catalysts;PEMFC cathode;Pyrolysis temperature;X-ray absorption spectrum;Carbon black;Chelation;Electrolytic reduction;Electromagnetic wave absorption;Platinum;Porphyrins;Precious metals;Proton exchange membrane fuel cells (PEMFC);Pyrolysis;Rotating disks;Catalysts,"C.-H. Wang; Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan; email: chwang@mail.ntust.edu.tw",,,,,,,03603199,0080311393,IJHED,,English,Int J Hydrogen Energy,Conference paper,Scopus,,2-s2.0-84865450669,,Taiwan,mail.ntust.edu.tw,,,"Chang, S.-T.; Hsu, H.-C.; Huang, H.-C.; Wang, C.-H.; Du, H.-Y.; Chen, L.-C.; Lee, J.-F.; Chen, K.-H."
"Chen, J., Gao, W., Yin, Y., Wang, C., Ouyang, H., Mao, Z.",Preparation of PEMFC catalysts by electrodeposition; 电化学沉积法制备质子交换膜燃料电池催化剂,2024,Huagong Jinzhan/Chemical Industry and Engineering Progress,43,4,,1796,1809,,2,10.16085/j.issn.1000-6613.2023-0695,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85193203832&doi=10.16085%2Fj.issn.1000-6613.2023-0695&partnerID=40&md5=8d7a59cff50168e93f6faa04148c2f40,"College of Mechanical and Electrical Engineering, Central South University, Changsha, Hunan, China; Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China","Chen, Jiayi, College of Mechanical and Electrical Engineering, Central South University, Changsha, Hunan, China; Gao, Weitao, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China; Yin, Yanan, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China; Wang, Cheng, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China; Ouyang, Hongwu, College of Mechanical and Electrical Engineering, Central South University, Changsha, Hunan, China; Mao, Zongqiang, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China","As an energy conversion device that converts fuel chemical energy directly into electrical energy, proton exchange membrane fuel cell (PEMFC) has received much attention because of its high efficiency and environmental protection advantages. The catalyst directly determines the performance of PEMFC and is one of the most central parts of PEMFC. Electrodeposition is considered as a promising method for the preparation of PEMFC catalysts due to the advantages of controllable nucleation, low cost, easy operation and scalability. This article introduces the common processes in electrodeposition and reviews the representative achievements of PEMFC catalyst preparations by electrodeposition in recent years. It is pointed out that through accurately controlling the voltage, current and solution components, the electrodeposition has outstanding advantages in the preparation of alloy catalysts, non-precious metal catalysts, and catalysts with special morphologies such as core-shell structure, nanowire structure and nano-array structure. This allows the electrodeposition superior to other methods for the preparation of PEMFC catalysts, and to achieve industrial application. Finally, this article foresees the future research focus and direction for the preparation of PEMFC catalysts by electrodeposition, and points out that the researches on the regulation mechanism and catalytic mechanism of electrodeposition should be combined to guide the improvement of the preparation process. Meanwhile, the application pathway of electrodeposition for low-platinum or non-platinum catalysts should be explored, which will be of help to the technological breakthrough of PEMFC catalysts. © 2024 Chemical Industry Press Co., Ltd.. All rights reserved.",catalyst; electrodeposition; fuel cell,Electrodes; Nanocatalysts; Platinum; Proton exchange membrane fuel cells (PEMFC); Chemical energy; Electrical energy; Energy conversion devices; Energy protons; Fuel cell catalysts; Higher efficiency; Low-costs; Performance; Proton-exchange membranes fuel cells; ]+ catalyst; Electrodeposition,catalyst;electrodeposition;fuel cell;Electrodes;Nanocatalysts;Platinum;Proton exchange membrane fuel cells (PEMFC);Chemical energy;Electrical energy;Energy conversion devices;Energy protons;Fuel cell catalysts;Higher efficiency;Low-costs;Performance;Proton-exchange membranes fuel cells;]+ catalyst,"H. Ouyang; College of Mechanical and Electrical Engineering, Central South University, Changsha, Hunan, 410083, China; email: oyhw@csu.edu.cn",,,,,,"Chemical Industry Press Co., Ltd.",10006613,,,,Chinese,Huagong Jinzhan/Chem. Ind. Eng. Prog.,Article,Scopus,,2-s2.0-85193203832,,China,csu.edu.cn,,,"Chen, J.; Gao, W.; Yin, Y.; Wang, C.; Ouyang, H.; Mao, Z."
"Yu, E.H., Krewer, U., Scott, K.",Principles and materials aspects of direct alkaline alcohol fuel cells,2010,Energies,3,8,,1499,1528,,331,10.3390/en3081499,https://www.scopus.com/inward/record.uri?eid=2-s2.0-77957260256&doi=10.3390%2Fen3081499&partnerID=40&md5=94929ee73f02e534e5bd3233cefe3dc0,"Newcastle University, Newcastle, Tyne and Wear, United Kingdom; Max Planck Institute for Dynamics of Complex Technical Systems, Magdeburg, Sachsen-Anhalt, Germany; Portable Energy Systems, Otto-von-Guericke-Universität Magdeburg, Magdeburg, Sachsen-Anhalt, Germany","Yu, Eileen Hao, Newcastle University, Newcastle, Tyne and Wear, United Kingdom; Krewer, Ulrike, Max Planck Institute for Dynamics of Complex Technical Systems, Magdeburg, Sachsen-Anhalt, Germany, Portable Energy Systems, Otto-von-Guericke-Universität Magdeburg, Magdeburg, Sachsen-Anhalt, Germany; Scott, Keith, Newcastle University, Newcastle, Tyne and Wear, United Kingdom","Direct alkaline alcohol fuel cells (DAAFCs) have attracted increasing interest over the past decade because of their favourable reaction kinetics in alkaline media, higher energy densities achievable and the easy handling of the liquid fuels. In this review, principles and mechanisms of DAAFCs in alcohol oxidation and oxygen reduction are discussed. Despite the high energy densities available during the oxidation of polycarbon alcohols they are difficult to oxidise. Apart from methanol, the complete oxidation of other polycarbon alcohols to CO<inf>2</inf> has not been achieved with current catalysts. Different types of catalysts, from conventional precious metal catalyst of Pt and Pt alloys to other lower cost Pd, Au and Ag metal catalysts are compared. Non precious metal catalysts, and lanthanum, strontium oxides and perovskite-type oxides are also discussed. Membranes like the ones used as polymer electrolytes and developed for DAAFCs are reviewed. Unlike conventional proton exchange membrane fuel cells, anion exchange membranes are used in present DAAFCs. Fuel cell performance with DAAFCs using different alcohols, catalysts and membranes, as well as operating parameters are summarised. In order to improve the power output of the DAAFCs, further developments in catalysts, membrane materials and fuel cell systems are essential. © 2010 by the authors; licensee MDPI, Basel, Switzerland.",Alcohol oxidation; Anion exchange membranes; Catalysts; Fuel cells; Oxygen reduction; Power output,Alcohol fuels; Carbon dioxide; Catalysts; Electrolytic reduction; Fuel cells; Gas fuel purification; Ion exchange membranes; Lanthanum oxides; Membranes; Oxidation; Palladium; Platinum; Platinum alloys; Platinum metals; Polyelectrolytes; Precious metal alloys; Precious metals; Proton exchange membrane fuel cells (PEMFC); Reaction kinetics; Alcohol oxidation; Anion exchange membrane; Higher energy density; Non-precious metal catalysts; Oxygen Reduction; Perovskite type oxides; Power out put; Precious metal catalysts; Alkaline fuel cells,Alcohol oxidation;Anion exchange membranes;Catalysts;Fuel cells;Oxygen reduction;Power output;Alcohol fuels;Carbon dioxide;Electrolytic reduction;Gas fuel purification;Ion exchange membranes;Lanthanum oxides;Membranes;Oxidation;Palladium;Platinum;Platinum alloys;Platinum metals;Polyelectrolytes;Precious metal alloys;Precious metals;Proton exchange membrane fuel cells (PEMFC);Reaction kinetics;Anion exchange membrane;Higher energy density;Non-precious metal catalysts;Perovskite type oxides;Power out put;Precious metal catalysts;Alkaline fuel cells,"U. Krewer; Max Planck Institute for Dynamics of Complex Technical Systems, 39106 Magdeburg, Sandtorstrasse 1, Germany; email: krewer@mpi-magdeburg.mpg.de",,,,,,MDPI AG Postfach Basel CH-4005,,,,,English,Energies,Review,Scopus,,2-s2.0-77957260256,,United Kingdom;Germany,mpi-magdeburg.mpg.de,,,"Yu, E.H.; Krewer, U.; Scott, K."
"Zhao, S.H., Pan, Y.",Principles of coordination structure design of single-atom catalysts in electrocatalytic oxygen reduction reaction,2025,RARE METALS,44,5,,2900,2920,21,4,10.1007/s12598-024-03085-x,,"[Zhao, Shi-Hang; Pan, Yuan] China Univ Petr East China, State Key Lab Heavy Oil Proc, Qingdao 266580, Peoples R China",,"Proton exchange membrane fuel cells have been identified as a potentially valuable technology for the efficient conversion of hydrogen energy into electrical energy. Nevertheless, one significant constraint on the performance of fuel cells is the oxygen reduction reaction (ORR). It is meaningful to progress the development of representative ORR electrocatalysts. In recent times, there has been an intensified focus on single-atom catalysts (SACs) due to the advantages of homogeneous distribution and high atom utilization efficiency. In particular, the coordination structure of metal sites plays an important role in the electrochemical performance of SACs. However, the relationship between coordination structures and catalytic performance remains unclear. In this review, we summarized the research progress on SACs in electrocatalytic ORR in recent years. Then the structure-activity relationship in the symmetric and asymmetric coordination structures of SACs was clarified. We further proposed rational design principles for regulating the coordination structure of SACs. Finally, the opportunities and challenges were discussed.",Oxygen reduction reaction; Single-atom catalysis; Coordination structure; Electrocatalysis; Proton exchange membrane fuel cell,N-C CATALYSTS; DOPED CARBON; PERFORMANCE; SITES; POLYANILINE; PROGRESS; IRON,Oxygen reduction reaction;Single-atom catalysis;Coordination structure;Electrocatalysis;Proton exchange membrane fuel cell;N-C CATALYSTS;DOPED CARBON;PERFORMANCE;SITES;POLYANILINE;PROGRESS;IRON,panyuan@upc.edu.cn,,"12B FUXIN RD, BEIJING 100814, PEOPLES R CHINA",,,,NONFERROUS METALS SOC CHINA,1001-0521,,,,English,RARE METALS,Review,WoS,Materials Science; Metallurgy & Metallurgical Engineering,WOS:001411733900001,2-s2.0-85218009871,China,upc.edu.cn,China Univ Petr East China,"China Univ Petr East China, China","Zhao, Shi-Hang; Pan, Yuan"
"Fruehwald, H.M., Ebralidze, I.I., Melino, P.D., Zenkina, O.V., Easton, E.B.",Probing the Influence of the Carbon Support on the Activity of Fe-N3/C Model Active Sites for the Oxygen Reduction Reaction,2020,JOURNAL OF THE ELECTROCHEMICAL SOCIETY,167,8,084520,,,11,17,10.1149/1945-7111/ab92b9,,"[Fruehwald, Holly M.; Ebralidze, Iraklii I.; Melino, Peter D.; Zenkina, Olena V.; Easton, E. Bradley] Ontario Tech Univ, Electrochem Mat Lab, Fac Sci, Univ Ontario Inst Technol, Oshawa, ON L1G 0C5, Canada",,"We report here an investigation of the role that various carbon supports have on a model non-precious metal catalyst for the oxygen reduction reaction (ORR) prepared through a molecularly defined terpyridine moiety covalently embedded onto various high surface area carbons (Black Pearls 2000, Ketjen Black 600, Multi-Walled Carbon Nanotubes). A terpyridine modified catalyst has been previously prepared and allowed for the controlled deposition of one specific and unique N-3/C active site on the surface of the support. The effect of changing the porosity and surface area of the carbon was analyzed for its oxygen reduction reaction activity and characterized using thermogravimetric analysis, pore size determination, and rotating disk measurements. This system showed that when a more microporous support was used the activity for the oxygen reduction reaction was significantly decreased in acidic media, this could be explained by the differences in the formation and overall accessibility of the active sites on the high surface area supports. (C) 2020 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.",Fuel Cells - PEM; Electrocatalysis; Surface functionalization,METAL-FREE CATALYSTS; PEM FUEL-CELLS; DIAZONIUM CHEMISTRY; IRON; ALKALINE; FE/N/C; ELECTROCATALYSTS; PROTONATION; PERFORMANCE; STABILITY,Fuel Cells - PEM;Electrocatalysis;Surface functionalization;METAL-FREE CATALYSTS;PEM FUEL-CELLS;DIAZONIUM CHEMISTRY;IRON;ALKALINE;FE/N/C;ELECTROCATALYSTS;PROTONATION;PERFORMANCE;STABILITY,brad.easton@uoit.ca,,"65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA",Meeting of the Society,"Atlanta, GA","OCT 13-17, 2019",ELECTROCHEMICAL SOC INC,0013-4651,,,,English,J ELECTROCHEM SOC,Article; Proceedings Paper,WoS,Electrochemistry; Materials Science,WOS:000537493200001,,Canada,uoit.ca,Ontario Tech Univ,"Ontario Tech Univ, Canada","Fruehwald, Holly M.; Ebralidze, Iraklii I.; Melino, Peter D.; Zenkina, Olena V.; Easton, E. Bradley"
"Kangkamano, T., Vagin, M., Meng, L.Y., Thavarungkul, P., Kanatharana, P., Crispin, X., Mak, W.C.",Product-to-intermediate relay achieving complete oxygen reduction reaction (cORR) with Prussian blue integrated nanoporous polymer cathode in fuel cells,2020,NANO ENERGY,78,,105125,,,7,13,10.1016/j.nanoen.2020.105125,,"[Kangkamano, Tawatchai; Meng, Lingyin; Mak, Wing Cheung] Linkoping Univ, Dept Phys Chem & Biol IFM, S-58183 Linkoping, Sweden; [Vagin, Mikhail; Crispin, Xavier] Linkoping Univ, Dept Sci & Technol ITN, Lab Organ Elect, S-60174 Norrkoping, Sweden; [Kangkamano, Tawatchai; Thavarungkul, Panote; Kanatharana, Proespichaya] Prince Songkla Univ, Ctr Excellence Trace Anal & Biosensor, Hat Yai 90112, Songkhla, Thailand; [Kangkamano, Tawatchai; Kanatharana, Proespichaya] Prince Songkla Univ, Dept Chem, Hat Yai 90112, Songkhla, Thailand; [Thavarungkul, Panote] Prince Songkla Univ, Dept Phys, Hat Yai 90112, Songkhla, Thailand; [Kangkamano, Tawatchai] Thaksin Univ, Dept Chem, Papayom 93110, Phattalung, Thailand",,"The oxygen reduction reaction (ORR) is an essential process in electrocatalysis limiting the commercialization of sustainable energy conversion technologies, such as fuel cells. The use of conducting polymers as molecular porous and conducting catalysts obtained from the high abundance elements enables the route towards low cost and high-throughput fabrication of disposable plastic electrodes of fuel cells. Poly(3,4-ethylenedioxythiophene) (PEDOT) is a 2-electron ORR electrocatalyst yielding specifically hydrogen peroxide that limits the full utilization of chemical energy of oxygen. Here, we demonstrated an innovative product-to-intermediate relay approach achieving complete oxygen reduction reaction (cORR) with Prussian blue (PB) integrated microporous PEDOT cathode in fuel cells. The microporous structured PEDOT electrode prepared via a simple cryosynthesis allows the bulk integration and stabilization of the poor conducting PB co-catalyst into the PEDOT ion-electron conductor, while the microporous PEDOT allows effective oxygen diffusion into the matrix. We evaluated systematically the effect of sequential PEDOT 2-electron ORR followed by PB co-catalysis launching hydrogen peroxide reduction reaction (HPRR) into H2O. This resulted in the establishment of electronic and ionic transport between PEDOT and PB catalyst enabling the combination of enhanced ORR electrocatalysis by means of the ORR course extension from 2to 4-electron reduction to achieve cORR. The cORR performance delivered by the product-to-intermediate relay between microporous PEDOT and PB co-catalysis led to a four times increase in power density of model proton-exchange membrane fuel cell (PEMFC) assembled from the polymer-based air breathing cathode.","Complete oxygen reduction reaction; Poly(3,4-ethylenedioxythiophene); Prussian blue; Cryosynthesis; Proton-exchange membrane fuel cell",CARBON NANOTUBES; POLYPYRROLE NANOCOMPOSITES; MODIFIED ELECTRODE; FE/N/C CATALYSTS; ELECTROCATALYSTS; IRON; POLYANILINE; MEMBRANE; FABRICATION; BIOSENSOR,"Complete oxygen reduction reaction;Poly(3,4-ethylenedioxythiophene);Prussian blue;Cryosynthesis;Proton-exchange membrane fuel cell;CARBON NANOTUBES;POLYPYRROLE NANOCOMPOSITES;MODIFIED ELECTRODE;FE/N/C CATALYSTS;ELECTROCATALYSTS;IRON;POLYANILINE;MEMBRANE;FABRICATION;BIOSENSOR",mikhail.vagin@liu.se; wing.cheung.mak@liu.se,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2211-2855,,,,English,NANO ENERGY,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000596607500005,,Sweden;Thailand,liu.se,Linkoping Univ;Prince Songkla Univ;Thaksin Univ,"Linkoping Univ, Sweden;Prince Songkla Univ, Thailand;Thaksin Univ, Thailand","Kangkamano, Tawatchai; Vagin, Mikhail; Meng, Lingyin; Thavarungkul, Panote; Kanatharana, Proespichaya; Crispin, Xavier; Mak, Wing Cheung"
"Zhang, J., Yue, Q.",Progress on the anode catalysts for proton exchange membrane water electrolysis; 质子交换膜电解水阳极析氧催化剂,2022,Chinese Science Bulletin,67,24,,2889,2905,,6,10.1360/TB-2022-0014,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85138447696&doi=10.1360%2FTB-2022-0014&partnerID=40&md5=13cf4bab9fb734b118d29505787f0d92,"Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, China","Zhang, Jiahao, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, China; Yue, Qin, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, China","The rapid development of the industry drives an intense demand for energy supply. Over the past century, fossil fuels such as coal, oil and natural gas have provided a strong energy support for the modernization of the world. However, the limited fossil fuels cannot satisfy the continuously increasing power requirement in the future any more. Meanwhile, severe environmental pollution caused by massive combustion of carbon-based fuels also brings great danger to human’s life. Therefore, it is urgent to develop renewable and clean energy to achieve sustainable development of the society. Renewable energy represented by hydropower, solar energy and wind power has attracted much attention and been widely utilized owing to its environmental friendliness and inexhaustible supply, while the uneven geographical distribution and fluctuation determine that it is unable to output electricity steadily and may lead to a waste of power. A key approach to this problem lies in converting the fluctuated renewable energy into stable chemical energy via electrochemical methods, and storing it as the chemical fuel. As a potential candidate, hydrogen works as an ideal carrier for power storage and supply due to its high energy density, free carbon emission and abundant reserve. Proton exchange membrane (PEM) water electrolysis driven by renewable energy is considered as a promising strategy for producing green hydrogen, by virtue of high operating current density, low ohmic loss, and flexible loading range. In comparison to the cathodic hydrogen production, the sluggish oxygen evolution reaction (OER) on the anode remains to be the bottleneck and retards the overall performance. Besides, the harsh acid environment on the membrane and high anode potential present severe challenges to the stability of the anode materials. Therefore, tremendous efforts have been devoted to developing active and durable anode catalysts for promoting the practical PEM-based OER proceeding under a strong acidic media during electrolysis. This review gives an overview on recent progress in the design and synthesis of robust electrocatalysts for acidic water oxidation, emphasizing the strategies for achieving high electrocatalytic activity without compromise in durability. Firstly, the mechanisms of electrocatalytic OER in acidic media, which include adsorbate evolution mechanism and lattice oxygen mediated mechanism, are discussed in detail to obtain the theoretical guideline on catalyst design. Subsequently, kinds of acidic OER catalysts are introduced and categorized to summarize the effective strategies for performance optimization. It was found that the OER performance can be enhanced by exposing more catalytic active sites as well as enhancing the intrinsic catalytic activity of the active sites. To reduce or even replace the noble metals and develop the cost-effective anode catalysts, the non-precious metal catalysts represented by Co, Mn and Sb-based materials, which are tolerant to acidic environments, are discussed. Then, the concerned stability of acidic OER and corresponding optimization methods are summarized. In addition, anode catalyst supports with high electrical conductivity, large specific surface area and good stability are squarely concluded, which also play a key role in water oxidation. At last, the various strategies to elevate OER performance are outlined, together with the perspectives of future-generation electrocatalysts for durable and cost-effective PEM water electrolysis. © 2022 Chinese Academy of Sciences. All rights reserved.",electrocatalysis; oxygen evolution reaction; oxygen evolution reaction catalyst; proton exchange membrane water electrolysis,Anodes; Carbon; Electrocatalysts; Electrolysis; Fossil fuels; Geographical distribution; Hydrogen fuels; Hydrogen production; Hydrogen storage; Oxygen; Proton exchange membrane fuel cells (PEMFC); Solar energy; Solar power generation; Sustainable development; Waste incineration; Wind power; Acidic media; Anode catalysts; Oxygen evolution reaction catalyst; Proton exchange membrane water electrolyse; Proton exchange membranes; Reaction performance; Renewable energies; Water electrolysis; Water oxidation; ]+ catalyst; Electrocatalysis,electrocatalysis;oxygen evolution reaction;oxygen evolution reaction catalyst;proton exchange membrane water electrolysis;Anodes;Carbon;Electrocatalysts;Electrolysis;Fossil fuels;Geographical distribution;Hydrogen fuels;Hydrogen production;Hydrogen storage;Oxygen;Proton exchange membrane fuel cells (PEMFC);Solar energy;Solar power generation;Sustainable development;Waste incineration;Wind power;Acidic media;Anode catalysts;Proton exchange membrane water electrolyse;Proton exchange membranes;Reaction performance;Renewable energies;Water electrolysis;Water oxidation;]+ catalyst,"Q. Yue; Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, Chengdu, 610054, China; email: qinyue@uestc.edu.cn",,,,,,Chinese Academy of Sciences,0023074X,,,,Chinese,Kexue Tongbao/Chin. Sc. Bull.,Review,Scopus,,2-s2.0-85138447696,,China,uestc.edu.cn,,,"Zhang, J.; Yue, Q."
"Guo, L., Hwang, S., Li, B., Yang, F., Wang, M., Chen, M., Yang, X., Karakalos, S., Cullen, D.A., Feng, Z., Wang, G., Wu, G., Xu, H.",Promoting Atomically Dispersed MnN4Sites via Sulfur Doping for Oxygen Reduction: Unveiling Intrinsic Activity and Degradation in Fuel Cells,2021,ACS Nano,15,4,,6886,6899,,166,10.1021/acsnano.0c10637,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85104914023&doi=10.1021%2Facsnano.0c10637&partnerID=40&md5=cfd55a267dfa473a2157bc62f6cf08a4,"School of Engineering and Applied Sciences, Buffalo, NY, United States; Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, United States; Swanson School of Engineering, Pittsburgh, PA, United States; Giner, Incorporated and Giner Electrochemical Systems, LLC, Newtown, MA, United States; College of Engineering, Corvallis, OR, United States; Molinaroli College of Engineering and Computing, Columbia, SC, United States; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States","Guo, Lin, School of Engineering and Applied Sciences, Buffalo, NY, United States; Hwang, Sooyeon, Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, United States; Li, Boyang, Swanson School of Engineering, Pittsburgh, PA, United States; Yang, Fan, Giner, Incorporated and Giner Electrochemical Systems, LLC, Newtown, MA, United States; Wang, Maoyu, College of Engineering, Corvallis, OR, United States; Chen, Mengjie, School of Engineering and Applied Sciences, Buffalo, NY, United States; Yang, Xiaoxuan, School of Engineering and Applied Sciences, Buffalo, NY, United States; Karakalos, Stavros G., Molinaroli College of Engineering and Computing, Columbia, SC, United States; Cullen, David A., Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Feng, Zhenxing, College of Engineering, Corvallis, OR, United States; Wang, Guofeng, Swanson School of Engineering, Pittsburgh, PA, United States; Wu, Gang, School of Engineering and Applied Sciences, Buffalo, NY, United States; Xu, Hui, Giner, Incorporated and Giner Electrochemical Systems, LLC, Newtown, MA, United States","Carbon supported and nitrogen coordinated single Mn site (Mn-N-C) catalysts are the most desirable platinum group metal (PGM)-free cathode catalysts for proton-exchange membrane fuel cells (PEMFCs) due to their insignificant Fenton reactions (vs. Fe), earth abundances (vs. Co), and encouraging activity and stability. However, current Mn-N-C catalysts suffer from high overpotential due to low intrinsic activity and less dense MnN4 sites. Herein, we present a sulfur-doped Mn-N-C catalyst (Mn-N-C-S) synthesized through an effective adsorption-pyrolysis process. Using electron microscopy and X-ray absorption spectroscopy (XAS) techniques, we verify the uniform dispersion of MnN4 sites and confirm the effect of S doping on the Mn-N coordination. The Mn-N-C-S catalyst exhibits a favorable oxygen reduction reaction (ORR) activity in acidic media relative to the S-free Mn-N-C catalyst. The corresponding membrane electrode assembly (MEA) generates enhanced performance with a peak power density of 500 mW cm-2 under a realistic H2/air environment. The constant voltage tests of fuel cells confirm the much-enhanced stability of the Mn-N-C-S catalyst compared to the Fe-N-C and Fe-N-C-S catalysts. The electron microscopy and Fourier transform XAS analyses provide insights into catalyst degradation associated with Mn oxidation and agglomeration. The theoretical calculation elucidates that the promoted ORR activity is mainly attributed to the spatial effect stemmed from the repulsive interaction between the ORR intermediates and adjacent S dopants. © 2021 American Chemical Society.",electrocatalysis; fuel cells; oxygen reduction; single metal site; sulfur doping,Catalysts; Coordination reactions; Electrodes; Electrolytic reduction; Electron microscopes; Electron microscopy; Gas fuel purification; Iron compounds; Manganese; Manganese metallography; Oxygen; Oxygen reduction reaction; Sulfur; X ray absorption spectroscopy; Catalyst degradation; Intrinsic activities; Membrane electrode assemblies; Peak power densities; Platinum group metals; Proton exchange membrane fuel cell (PEMFCs); Repulsive interactions; Theoretical calculations; Proton exchange membrane fuel cells (PEMFC),electrocatalysis;fuel cells;oxygen reduction;single metal site;sulfur doping;Catalysts;Coordination reactions;Electrodes;Electrolytic reduction;Electron microscopes;Electron microscopy;Gas fuel purification;Iron compounds;Manganese;Manganese metallography;Oxygen;Oxygen reduction reaction;Sulfur;X ray absorption spectroscopy;Catalyst degradation;Intrinsic activities;Membrane electrode assemblies;Peak power densities;Platinum group metals;Proton exchange membrane fuel cell (PEMFCs);Repulsive interactions;Theoretical calculations;Proton exchange membrane fuel cells (PEMFC),"G. Wu; Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, 14260, United States; email: gangwu@buffalo.edu; G. Wang; Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, 15260, United States; email: guw8@pitt.edu; H. Xu; Giner Inc., Newton, 02466, United States; email: hxu@ginerinc.com; Z. Feng; School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, 97331, United States; email: zhenxing.feng@oregonstate.edu",,,,,,American Chemical Society,19360851,,,33787214,English,ACS Nano,Article,Scopus,,2-s2.0-85104914023,,United States,buffalo.edu,,,"Guo, L.; Hwang, S.; Li, B.; Yang, F.; Wang, M.; Chen, M.; Yang, X.; Karakalos, S.; Cullen, D.A.; Feng, Z.; Wang, G.; Wu, G.; Xu, H."
"Woo, J., Yang, S.Y., Sa, Y.J., Choi, W.Y., Lee, M.H., Lee, H.W., Shin, T.J., Kim, T.Y., Joo, S.H.",Promoting Oxygen Reduction Reaction Activity of Fe-N/C Electrocatalysts by Silica-Coating-Mediated Synthesis for Anion-Exchange Membrane Fuel Cells,2018,Chemistry of Materials,30,19,,6684,6701,,102,10.1021/acs.chemmater.8b02117,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85053816608&doi=10.1021%2Facs.chemmater.8b02117&partnerID=40&md5=34b5d51ebeb6d7c2b22930278ba1a62e,"School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea; Ulsan National Institute of Science and Technology, Ulsan, South Korea; Fuel Cell Research Center, Korea Institute of Energy Research, Daejeon, South Korea","Woo, Jinwoo, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea; Yang, Seung-yong, Fuel Cell Research Center, Korea Institute of Energy Research, Daejeon, South Korea; Sa, Young Jin, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea; Choi, Won-young, Fuel Cell Research Center, Korea Institute of Energy Research, Daejeon, South Korea; Lee, Myeonghwa, Fuel Cell Research Center, Korea Institute of Energy Research, Daejeon, South Korea; Lee, Hyun-Wook, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea; Shin, Tae Joo, Ulsan National Institute of Science and Technology, Ulsan, South Korea; Kim, Taeyoung, Fuel Cell Research Center, Korea Institute of Energy Research, Daejeon, South Korea; Joo, Sang Hoon, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea","Iron- and nitrogen-codoped carbon (Fe-N/C) catalysts have emerged as promising alternatives to Pt-based catalysts for the oxygen reduction reaction (ORR) owing to their prominent ORR activity among nonprecious metal catalysts (NPMCs). This high ORR activity originates from atomically dispersed Fe coordinated with nitrogen atoms (Fe-N<inf>x</inf> site). However, the rational design of Fe-N/C catalysts with abundant Fe-N<inf>x</inf> active sites remains a challenge. In this work, we demonstrate that a silica-coating-mediated synthetic strategy enables the preparation of Fe-N/C catalysts enriched with active Fe-N<inf>x</inf> sites while mitigating the formation of less active Fe and Fe<inf>3</inf>C species. The silica-coating-mediated strategy was generally applicable to various types of Fe and N precursors, including iron porphyrin, iron acetate/1,10-phenanthroline, and iron chloride/polyaniline. This strategy was also effective in the preparation of Fe-N/C catalysts with various carbon supports and a wide range of Fe contents and pyrolysis temperatures. The strategy could be further extended to S- or P-doped Fe-N/C catalysts, in which the formation of inactive FeS and Fe<inf>2</inf>P species was suppressed. As a result, Fe-N/C catalysts prepared with the silica coating exhibited improved ORR activity up to a factor of 11 compared to silica-uncoated counterparts. Significantly, the S-doped Fe-N/C catalyst exhibited very high ORR activity with half-wave potential at 0.91 V (vs RHE) in alkaline media. In anion-exchange membrane fuel cell (AEMFC) tests, the S-doped Fe-N/C-based cathode showed a current density of 977 mA cm-2 at 0.6 V, which is the highest performance among reported AMEFCs with NPMC-based cathodes. The S-doped Fe-N/C-based cathode also demonstrated promising volumetric current density in an acidic proton exchange membrane fuel cell. Thus, the silica-coating-mediated strategy is generally effective in preparing atomically dispersed catalytic entities and may be applicable to other catalytic reactions whereby monatomic catalysts exhibit high catalytic activities. © 2018 American Chemical Society.",,Alkaline fuel cells; Carbon; Catalysis; Cathodes; Chlorine compounds; Coatings; Doping (additives); Electrocatalysts; Electrolytic reduction; Ion exchange membranes; Iron compounds; Nitrogen; Oxygen; Proton exchange membrane fuel cells (PEMFC); Silica; Anion-exchange membrane fuel cells; Catalytic reactions; Half-wave potential; Non-precious metal catalysts; Oxygen reduction reaction; Pyrolysis temperature; Synthetic strategies; Volumetric currents; Catalyst activity,Alkaline fuel cells;Carbon;Catalysis;Cathodes;Chlorine compounds;Coatings;Doping (additives);Electrocatalysts;Electrolytic reduction;Ion exchange membranes;Iron compounds;Nitrogen;Oxygen;Proton exchange membrane fuel cells (PEMFC);Silica;Anion-exchange membrane fuel cells;Catalytic reactions;Half-wave potential;Non-precious metal catalysts;Oxygen reduction reaction;Pyrolysis temperature;Synthetic strategies;Volumetric currents;Catalyst activity,"T.-Y. Kim; Buan Fuel Cell Center, Korea Institute of Energy Research (KIER), Jeollabuk-do, 56332, South Korea; email: kty@kier.re.kr",,,,,,American Chemical Society service@acs.org,08974756,,CMATE,,English,Chem. Mater.,Article,Scopus,,2-s2.0-85053816608,,South Korea,kier.re.kr,,,"Woo, J.; Yang, S.Y.; Sa, Y.J.; Choi, W.-Y.; Lee, M.-H.; Lee, H.-W.; Shin, T.J.; Kim, T.-Y.; Joo, S.H."
"Chi, B., Zhang, L.H., Yang, X.X., Zeng, Y.C., Deng, Y.J., Liu, M.R., Huo, J.L., Li, C.Z., Zhang, X.R., Shi, X.D., Shao, Y.J., Gu, L., Zheng, L.R., Cui, Z.M., Liao, S.J., Wu, G.",Promoting ZIF-8-Derived Fe-N-C Oxygen Reduction Catalysts via Zr Doping in Proton Exchange Membrane Fuel Cells: Durability and Activity Enhancements,2023,ACS CATALYSIS,13,7,,4221,4230,10,105,10.1021/acscatal.2c06118,,"[Chi, Bin; Zhang, Longhai; Liu, Mingrui; Huo, Junlang; Li, Chaozhong; Zhang, Xiaorong; Shi, Xiudong; Shao, Yijia; Cui, Zhiming; Liao, Shijun] South China Univ Technol, Sch Chem & Chem Engn, Key Lab Fuel Cell Technol Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China; [Chi, Bin; Zhang, Longhai; Liu, Mingrui; Huo, Junlang; Li, Chaozhong; Zhang, Xiaorong; Shi, Xiudong; Shao, Yijia; Cui, Zhiming; Liao, Shijun] South China Univ Technol, Key Lab New Energy Technol Guangdong Univ, Sch Chem & Chem Engn, Guangzhou 510641, Guangdong, Peoples R China; [Yang, Xiaoxuan; Zeng, Yachao; Wu, Gang] SUNY Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA; [Deng, Yijie] Univ South China, Hunan Prov Engn Technol Res Ctr Uranium Tailings T, Sch Resource Environm & Safety Engn, Hengyang 421001, Peoples R China; [Gu, Lin] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China; [Zheng, Lirong] Chinese Acad Sci, Inst High Energy Phys, Beijing 100190, Peoples R China",,"The atomically dispersed iron site and nitrogen co-doped carbon catalysts (Fe-N-C) have demonstrated promising performance in replacing Pt toward the oxygen reduction reaction (ORR) in acids for proton exchange membrane fuel cells. However, the insufficient durability of Fe-N-C catalysts prohibitively hinders their practical applications. Herein, we report that the co doping of Zr and Fe dual metal sites into a ZIF-8-derived mesoporous carbon exhibited significantly improved durability for the ORR. Especially, a membrane electrode assembly from the ORR cathode catalyst only lost 25% voltage after 20 h of continuous operation at a constant current density. After an extended test of up to 100 h, the Zr-doped Fe-N-C catalyst retained 40% of its initial performance, superior to the catalyst without Zr doping with more than 70% activity loss after only 20 h. The cathode also showed significantly improved ORR activity, achieving a maximum power density of 0.72 W cm-2 under H2/air conditions. Extensive experimental characterization and density functional theory calculations suggested that the promoted catalytic activity and stability are due to the formation of Zr-based active sites with enhanced acidic tolerance than the individual Fe sites. Also, the doping of Zr could suppress the formation of H2O2 and other free radicals, thus mitigating active site degradation. The possible Fe/Zr dual-metal active sites, i.e., N2(N)-Fe-N2-Zr-N2(O2), likely have enhanced intrinsic ORR activity relative to conventional FeNx sites.",PEM fuel cells; PGM-free catalysts; single metal sites; oxygen reduction reaction; durability,CATHODE CATALYSTS; SITES; ELECTROCATALYSTS; CARBON; DEGRADATION; ADDITIVES; IRON,PEM fuel cells;PGM-free catalysts;single metal sites;oxygen reduction reaction;durability;CATHODE CATALYSTS;SITES;ELECTROCATALYSTS;CARBON;DEGRADATION;ADDITIVES;IRON,chsjliao@scut.edu.cn; gangwu@buffalo.edu,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2155-5435,,,,English,ACS CATAL,Article,WoS,Chemistry,WOS:000953476600001,2-s2.0-85149943964,China;United States,scut.edu.cn,South China Univ Technol;SUNY Buffalo;Univ South China;Chinese Acad Sci,"South China Univ Technol, China;SUNY Buffalo, United States;Univ South China, China;Chinese Acad Sci, China","Chi, Bin; Zhang, Longhai; Yang, Xiaoxuan; Zeng, Yachao; Deng, Yijie; Liu, Mingrui; Huo, Junlang; Li, Chaozhong; Zhang, Xiaorong; Shi, Xiudong; Shao, Yijia; Gu, Lin; Zheng, Lirong; Cui, Zhiming; Liao, Shijun; Wu, Gang"
"Rimon, S.T.A., Mourshed, M., Kibria, M.G.","Proton exchange membrane fuel cells: advances in materials development, performance optimization, and future outlook",2025,ENERGY CONVERSION AND MANAGEMENT-X,27,,101102,,,51,13,10.1016/j.ecmx.2025.101102,,"[Rimon, Shah Tanvir Alam; Mourshed, Monjur; Kibria, Md. Golam] Rajshahi Univ Engn & Technol RUET, Dept Mech Engn, Rajshahi 6204, Bangladesh",,"Proton exchange membrane fuel cells (PEMFCs) are emerging as a promising energy conversion technology for sustainable power generation, offering high efficiency, low emissions, and adaptability to various applications, including transportation, stationary power systems, and portable electronics. This review critically examines the recent advancements in PEMFC components, including proton exchange membranes, catalyst layers, gas diffusion layers, and bipolar plates, focusing on material innovations, performance enhancements, and durability improvements. The study highlights recent developments in membrane technologies, such as perfluorosulfonic acid membranes, alternative hydrocarbon-based polymers, and composite structures, aimed at enhancing proton conductivity, mechanical stability, and hydration management under varying operational conditions. Furthermore, advancements in catalyst materials, including platinum group metal alloys, non-precious metal catalysts, and atomically dispersed catalysts, are discussed concerning their electrochemical activity, cost-effectiveness, and stability under fuel cell operating conditions. The impact of gas diffusion layer architecture, microporous layer optimization, and novel flow field designs on mass transport characteristics and water management is critically discussed. Additionally, this study examines key challenges, including high production costs, inadequate infrastructure, and technical barriers related to water management, membrane durability, and catalyst efficiency. Recent modeling and simulation approaches for optimizing fuel cell performance, including multi-physics simulations and machine-learning-assisted diagnostics, are also examined. Finally, future research directions are outlined, emphasizing the need for innovative materials, scalable manufacturing techniques, and integrated hydrogen economy strategies to accelerate the global deployment of PEMFC technology to meet net-zero emissions targets by 2050.",Hydrogen fuel cell; Water management; Catalyst efficiency; Thermal management; Net-Zero Emissions,GAS-DIFFUSION-LAYER; SERPENTINE FLOW-FIELD; HYDROGEN STORAGE CAPACITY; LIQUID WATER DISTRIBUTION; LIFE-CYCLE ASSESSMENT; MICRO-POROUS LAYER; PYROLYTIC-GRAPHITE SHEETS; OXYGEN REDUCTION REACTION; METAL-ORGANIC FRAMEWORK; RIB MASS-TRANSPORT,Hydrogen fuel cell;Water management;Catalyst efficiency;Thermal management;Net-Zero Emissions;GAS-DIFFUSION-LAYER;SERPENTINE FLOW-FIELD;HYDROGEN STORAGE CAPACITY;LIQUID WATER DISTRIBUTION;LIFE-CYCLE ASSESSMENT;MICRO-POROUS LAYER;PYROLYTIC-GRAPHITE SHEETS;OXYGEN REDUCTION REACTION;METAL-ORGANIC FRAMEWORK;RIB MASS-TRANSPORT,1902013@student.ruet.ac.bd; monjurmourshed@me.ruet.ac.bd; kibria@me.ruet.ac.bd,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2590-1745,,,,English,ENERG CONVERS MAN-X,Article,WoS,Thermodynamics; Energy & Fuels; Mechanics,WOS:001517375000001,2-s2.0-105008506454,Bangladesh,student.ruet.ac.bd,Rajshahi Univ Engn & Technol RUET,"Rajshahi Univ Engn & Technol RUET, Bangladesh","Rimon, Shah Tanvir Alam; Mourshed, Monjur; Kibria, Md. Golam"
"Zhang, Z., Jiang, C., Li, P., Feng, Q., Zhao, Z.L., Yao, K., Fan, J., Li, H., Wang, H.",Pt atoms on doped carbon nanosheets with ultrahigh N content as a superior bifunctional catalyst for hydrogen evolution/oxidation,2021,Sustainable Energy and Fuels,5,2,,532,539,,20,10.1039/d0se01516d,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099954830&doi=10.1039%2Fd0se01516d&partnerID=40&md5=5da23177b64962e8aae43c0fe880a2d5,"School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, China; State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, Shaanxi, China; Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, China","Zhang, Zhen, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China, Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, China; Jiang, Cheng, Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, China; Li, Ping, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, Shaanxi, China; Feng, Qi, Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, China; Zhao, Zhiliang, Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, China; Yao, Keguang, Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, China; Fan, Jiantao, Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, China; Li, Hui, Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, China; Wang, Haijiang, Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, China","Pt single-atom catalysts (SACs) have shown great potential for electrochemical catalysis. However, no systematic study of their bifunctional catalytic activity for the hydrogen evolution reaction (HER) and the hydrogen oxidation reaction (HOR) has yet been published. More significantly, the reported catalytic capabilities of Pt SACs have almost been exclusively measured using a rotating disk electrode (RDE) with a three-electrode configuration, which does not accurately reflect the catalysts' performance during operation within single-cell devices. Herein, we demonstrate the immobilization of isolated Pt atoms on a carbon nanosheet support doped with ultrahigh N content (12.1 at%; Pt/NCS) to create a bifunctional HER/HOR catalyst. Compared with commercial Pt/C, the developed Pt/NCS catalyst delivered high utilization as well as excellent mass activity enhancement and stability for both reactions. As a final test, a rigorous catalyst evaluation was conducted in both a proton exchange membrane (PEM) electrolyzer and a PEM fuel cell. As expected, with only half the Pt loading of commercial Pt/C, Pt/NCS-based electrodes in the electrolyzer and the fuel cell still exhibited slightly better performance than those based on Pt/C. This work constitutes a huge step from the academic study of Pt-based SCAs to their industrial application, and it focuses more attention on the harsh evaluation and optimization of SACs within commercial-scale devices. This journal is © The Royal Society of Chemistry.",,Atoms; Carbon; Catalyst activity; Catalytic oxidation; Electrodes; Electrolytic cells; Hydrogen; Hydrogen evolution reaction; Nanosheets; Platinum; Proton exchange membrane fuel cells (PEMFC); Bi-functional catalysts; Catalyst evaluation; Catalytic capability; Electrochemical catalysis; Hydrogen evolution; Hydrogen oxidation reaction; Proton-exchange membrane; Rotating disk electrodes; Platinum compounds; carbon nanotube; catalyst; hydrogen; nitrogen; oxidation; platinum,Atoms;Carbon;Catalyst activity;Catalytic oxidation;Electrodes;Electrolytic cells;Hydrogen;Hydrogen evolution reaction;Nanosheets;Platinum;Proton exchange membrane fuel cells (PEMFC);Bi-functional catalysts;Catalyst evaluation;Catalytic capability;Electrochemical catalysis;Hydrogen evolution;Hydrogen oxidation reaction;Proton-exchange membrane;Rotating disk electrodes;Platinum compounds;carbon nanotube;catalyst;nitrogen;oxidation,"H. Li; Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China; email: hui.li@sustech.edu.cn",,,,,,Royal Society of Chemistry,,,,,English,Sustain. Energy Fuels,Article,Scopus,,2-s2.0-85099954830,,China,sustech.edu.cn,,,"Zhang, Z.; Jiang, C.; Li, P.; Feng, Q.; Zhao, Z.L.; Yao, K.; Fan, J.; Li, H.; Wang, H."
"Yang, Z.J., Chen, C.Q., Zhao, Y.X., Wang, Q., Zhao, J.Q., Waterhouse, G.I.N., Qin, Y., Shang, L., Zhang, T.R.",Pt Single Atoms on CrN Nanoparticles Deliver Outstanding Activity and CO Tolerance in the Hydrogen Oxidation Reaction,2023,ADVANCED MATERIALS,35,1,,,,9,101,10.1002/adma.202208799,,"[Yang, Zhaojun; Zhao, Yunxuan; Zhao, Jiaqi; Shang, Lu; Zhang, Tierui] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China; [Yang, Zhaojun; Zhao, Jiaqi; Zhang, Tierui] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China; [Chen, Chaoqiu; Wang, Qing] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China; [Wang, Qing; Waterhouse, Geoffrey I. N.] Univ Auckland, Sch Chem Sci, Auckland 1142, New Zealand",,"The large-scale application of proton exchange membrane fuel cells is currently hampered by high cost of commercial Pt catalysts and their susceptibility to poisoning by CO impurities in H-2 feed. In this context, the development of CO-tolerant electrocatalysts with high Pt atom utilization efficiency for hydrogen oxidation reaction (HOR) is of critical importance. Herein, Pt single atoms are successfully immobilized on chromium nitride nanoparticles by atomic layer deposition method, denoted as Pt SACs/CrN. Electrochemical tests establish Pt SACs/CrN to be a very efficient HOR catalyst, with a mass activity that is 5.7 times higher than commercial PtRu/C. Strikingly, the excellent performance of Pt SACs/CrN is maintained after introducing 1000 ppm of CO in H-2 feed. The excellent CO-tolerance of Pt SACs/CrN is related to weaker CO adsorption on Pt single atoms. This work provides guidelines for the design and construction of active and CO-tolerant catalysts for HOR.",chromium nitride; CO tolerance; electrocatalysis; hydrogen oxidation reaction; Pt single-atom catalysts,CATALYSTS; REDUCTION; EFFICIENT; NITRIDE; ELECTROCATALYSTS; SITES; OXIDE,chromium nitride;CO tolerance;electrocatalysis;hydrogen oxidation reaction;Pt single-atom catalysts;CATALYSTS;REDUCTION;EFFICIENT;NITRIDE;ELECTROCATALYSTS;SITES;OXIDE,lushang@mail.ipc.ac.cn; tierui@mail.ipc.ac.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,0935-9648,,,36314386,English,ADV MATER,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000888427200001,2-s2.0-85142218326,China;New Zealand,mail.ipc.ac.cn,Chinese Acad Sci;Univ Chinese Acad Sci;Univ Auckland,"Chinese Acad Sci, China;Univ Chinese Acad Sci, China;Univ Auckland, New Zealand","Yang, Zhaojun; Chen, Chaoqiu; Zhao, Yunxuan; Wang, Qing; Zhao, Jiaqi; Waterhouse, Geoffrey I. N.; Qin, Yong; Shang, Lu; Zhang, Tierui"
"Li, X., Chen, T., Liu, D., Mu, Z., Yang, B., Xiang, Z.",Pyrolysis-Free Covalent Organic Polymers Directly for Oxygen Electrocatalysis,2023,Accounts of Chemical Research,,,,,,,4,10.1021/acs.accounts.3c00730,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85187308414&doi=10.1021%2Facs.accounts.3c00730&partnerID=40&md5=52b3a91dcfa167a31d32248544d9380a,"State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China","Li, Xueli, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Chen, Tengge, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Liu, Di, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Mu, Zhenjie, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Yang, Bolong, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Xiang, Zhonghua, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China","Conspectus Oxygen electrode catalysis is crucial for the efficient operation of clean energy devices, such as proton exchange membrane fuel cells (PEMFCs) and Zn-air batteries (ZABs). However, sluggish oxygen electrocatalysis kinetics in these infrastructures put forward impending requirements toward seeking efficient oxygen-electrode catalytic materials with a clear active-site configuration and geometrical morphology to study in depth the structure-property relationship of materials. Although transition-metal-nitrogen-carbon (M-N-C) electrocatalysts have shown great prospects currently and potential in oxygen electrocatalysis as promising platinum group metal-free catalysts, the universal pyrolysis operation in the preparation process often inevitably brings about randomness and diversity of active sites, for which it is difficult to determine the structure-activity relationship, understand the catalytic mechanism, and further improve facilities performance. Covalent organic polymers (COPs) are a class of molecular geometric constructs linked by irreversible kinetic covalent bonds through reticular chemistry. Unique structural tailorability, diverse design principles, and inherent well-defined construction in pristine COPs naturally provide a great platform to study the structure-property relationship of active sites and exhibit unique features for application. In this Account, we afford an overview of our recent attempts toward the utilization of COP materials as free-pyrolysis oxygen electrode catalysts, enabling accurate construction of oxygen electrodes with clear active site and geometrical morphology characteristics in PEMFC and ZAB devices yet without enduring any high-temperature pyrolysis treatments. Starting from the needs of modern electrocatalysis, we discussed the unique properties for the design and development of pyrolysis-free pristine COPs as high-performance oxygen electrode catalytic materials in terms of intrinsic electronic structure properties and membrane-electrode-assembly (MEA) application distinguished from pyrolysis M-N-C catalysts. First, the pyrolysis-free COP catalysts provide a viable molecular model catalyst platform, which is conducive to mechanism comprehension for the relationship between catalyst activity and structure. Second, the simple and low-energy consumption synthesis process for pyrolysis-free catalysts lays the foundation for the large-scale production of catalysts, oxygen electrodes, and even the entire stack assembly without considering numerous complicated factors as traditional pyrolytic catalysts. Besides, most traditional COPs are difficult to dissolve and solution process due to their cross-linked skeleton. Our newly developed COP materials with solution processability bring about new opportunities to the process and assemble oxygen electrodes into device. These properties are unparalleled and have not been systematically reviewed and analyzed by any research reports so far. Here, we have clarified the specific advantage and potential of pyrolysis-free COP materials as oxygen electrodes applied in PEMFC and ZAB devices in response to the latest progress and requirements of current electrocatalytic research. © 2024 American Chemical Society.",,,,"Z. Xiang; State Key Laboratory of Organic−Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China; email: xiangzh@mail.buct.edu.cn",,,,,,American Chemical Society,00014842,,ACHRE,,English,Acc. Chem. Res.,Article,Scopus,,2-s2.0-85187308414,,China,mail.buct.edu.cn,,,"Li, X.; Chen, T.; Liu, D.; Mu, Z.; Yang, B.; Xiang, Z."
"Wang, C.H., Huang, H.C., Chang, S.T., Lin, Y.C., Huang, M.F.",Pyrolysis of melamine-treated vitamin B12 as a non-precious metal catalyst for oxygen reduction reaction,2014,RSC ADVANCES,4,9,,4207,4211,5,18,10.1039/c3ra45734f,,"[Wang, Chen-Hao; Huang, Hsin-Chih; Chang, Sun-Tang; Lin, Yu-Chuan; Huang, Mei-Fang] Natl Taiwan Univ Sci & Technol, Dept Mat Sci & Engn, Taipei 10607, Taiwan",,"Active, inexpensive non-precious metal substitutes for current Pt-based catalysis are needed to reduce the cost of proton exchange membrane fuel cells (PEMFC). In this work, pyrolysis of a carbon black-supported melamine-treated vitamin B12 (py-B12-M/C) catalyst for the oxygen reduction reaction (ORR) establishes that the surface nitrogen content and nitrogen-carbon ratio strongly affect ORR activity. Under optimal conditions, the number of transferred electrons in py-B12-M/C and the hydrogen peroxide yield of its ORR are 3.95 and 2.5%, respectively.",,FE-BASED CATALYSTS; ELECTROLYTE FUEL-CELLS; CARBON SUPPORTS; ELECTROCATALYSTS; CATHODE,FE-BASED CATALYSTS;ELECTROLYTE FUEL-CELLS;CARBON SUPPORTS;ELECTROCATALYSTS;CATHODE,chwang@mail.ntust.edu.tw,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2046-2069,,,,English,RSC ADV,Article,WoS,Chemistry,WOS:000328956700001,2-s2.0-84891474711,Taiwan,mail.ntust.edu.tw,Natl Taiwan Univ Sci & Technol,"Natl Taiwan Univ Sci & Technol, Taiwan","Wang, Chen-Hao; Huang, Hsin-Chih; Chang, Sun-Tang; Lin, Yu-Chuan; Huang, Mei-Fang"
"Huang, H.C., Shown, I., Chang, S.T., Hsu, H.C., Du, H.Y., Kuo, M.C., Wong, K.T., Wang, S.F., Wang, C.H., Chen, L.C., Chen, K.H.",Pyrolyzed cobalt corrole as a potential non-precious catalyst for fuel cells,2012,Advanced Functional Materials,22,16,,3500,3508,,111,10.1002/adfm.201200264,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84865065895&doi=10.1002%2Fadfm.201200264&partnerID=40&md5=2cac1dcdf014afe13f47e56e5dde2223,"Academia Sinica Taiwan, Nankang, Taipei, Taiwan; Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei, Taiwan; Department of Chemistry, National Taiwan University, Taipei, Taiwan; Center for Condensed Matter Sciences, National Taiwan University, Taipei, Taiwan","Huang, Hsin Chih, Academia Sinica Taiwan, Nankang, Taipei, Taiwan; Shown, Indrajit, Academia Sinica Taiwan, Nankang, Taipei, Taiwan; Chang, Suntang, Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Hsu, Hsincheng, Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Du, Heyun, Academia Sinica Taiwan, Nankang, Taipei, Taiwan; Kuo, Mingcheng, Department of Chemistry, National Taiwan University, Taipei, Taiwan; Wong, Ken Tsung, Department of Chemistry, National Taiwan University, Taipei, Taiwan; Wang, Sea Fue, Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei, Taiwan; Wang, Chenhao, Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Chen, Li Chyong, Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, Center for Condensed Matter Sciences, National Taiwan University, Taipei, Taiwan; Chen, Kuei-Hsien, Academia Sinica Taiwan, Nankang, Taipei, Taiwan","Non-precious metal catalysts of the oxygen reduction reaction are highly favored for use in polymer electrolyte fuel cells (PEFC) because of their relatively low cost. Here, a new carbon-black-supported pyrolyzed Co-corrole (py-Co-corrole/C) catalyst of the oxygen reduction reaction (ORR) in a PEFC cathode is demonstrated to have high catalytic performance. The py-Co-corrole/C at 700 °C exhibits optimized ORR activity and participates in a direct four-electron reduction pathway for the reduction of O <inf>2</inf> to H <inf>2</inf>O. The H <inf>2</inf>-O <inf>2</inf> PEFC test of py-Co-corrole/C in the cathode reveals a maximum power density of 275 mW cm -2, which yields a higher performance and a lower Co loading than previous studies of Co-based catalysts for PEFCs. The enhancement of the ORR activity of py-Co-corrole/C is attributable to the four-coordinated Co-corrole structure and the oxidation state of the central cobalt. Pyrolyzed Co-corrole supported by carbon black catalyzes the oxygen reduction reaction (ORR) by a direct four-electron reduction pathway for the reduction of O <inf>2</inf> to H <inf>2</inf>O and exhibits high activity as the cathode catalyst of polymer electrolyte fuel cells. The pyrolysis changes the coordination structure and oxidation state of Co-corrole, leading to the increase in ORR activity. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.",corrole; fuel cells; non-precious metal catalysts; oxygen reduction reactions,Cathode catalyst; Co loading; Co-based catalysts; Coordination structures; Corroles; Four-electron reduction; High activity; High catalytic performance; Low costs; Maximum power density; Non-precious catalysts; Non-precious metal catalysts; Oxidation state; Oxygen reduction reaction; Polymer electrolyte fuel cells; Carbon black; Catalyst activity; Cathodes; Cobalt; Electrolytic reduction; Fuel cells; Loading; Polyelectrolytes; Polypyrroles; Precious metals; Pyrolysis; Proton exchange membrane fuel cells (PEMFC),corrole;fuel cells;non-precious metal catalysts;oxygen reduction reactions;Cathode catalyst;Co loading;Co-based catalysts;Coordination structures;Corroles;Four-electron reduction;High activity;High catalytic performance;Low costs;Maximum power density;Non-precious catalysts;Oxidation state;Oxygen reduction reaction;Polymer electrolyte fuel cells;Carbon black;Catalyst activity;Cathodes;Cobalt;Electrolytic reduction;Loading;Polyelectrolytes;Polypyrroles;Precious metals;Pyrolysis;Proton exchange membrane fuel cells (PEMFC),"C.-H. Wang; Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan; email: chenkh@pub.iams.sinica.edu.tw",,,,,,,1616301X,,AFMDC,,English,Adv. Funct. Mater.,Article,Scopus,,2-s2.0-84865065895,,Taiwan,pub.iams.sinica.edu.tw,,,"Huang, H.-C.; Shown, I.; Chang, S.-T.; Hsu, H.-C.; Du, H.-Y.; Kuo, M.-C.; Wong, K.-T.; Wang, S.-F.; Wang, C.-H.; Chen, L.-C.; Chen, K.-H."
"Wang, M.Q., Yang, W.H., Wang, H.H., Chen, C., Zhou, Z.Y., Sun, S.G.",Pyrolyzed Fe-N-C Composite as an Efficient Non-precious Metal Catalyst for Oxygen Reduction Reaction in Acidic Medium,2014,ACS CATALYSIS,4,11,,3928,3936,9,306,10.1021/cs500673k,,"[Wang, Mei-Qing; Yang, Wei-Hua] Huaqiao Univ, Coll Mat Sci & Engn, Xiamen 361021, Fujian, Peoples R China; [Wang, Hong-Hui; Zhou, Zhi-You; Sun, Shi-Gang] Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Fujian, Peoples R China; [Chen, Chi] E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China",,"Aimed at developing a highly active and stable non-precious metal catalyst (NPMC) for oxygen reduction reaction (ORR) in acidic proton-exchange membrane fuel cells (PEMFCs), a novel NPMC was prepared by pyrolyzing a composite of carbon-supported Fe-doped graphitic carbon nitride (Feg-C3N4@C) above 700 degrees C. In this paper, the influence of the pyrolysis temperature and Fe content on ORR performance was investigated. Rotating disk electrode (RDE) and rotating ring-disk electrode (RRDE) studies reveal that, with a half-wave potential of 0.75 V [versus reversible hydrogen electrode (RHE)] and a H2O2 yield of 2.6% at 0.4 V, the as-synthesized catalyst heat-treated at 750 degrees C with a Fe salt/dicyandiamide (DCD) mass ratio of 10% displays the optimal ORR activity and selectivity. Furthermore, the pyrolyzed FeNC composite exhibits superior durability in comparison to that of commercial 20 wt % Pt/C in acidic medium, making it a good candidate for an ORR electrocatalyst in PEMFCs.",non-precious metal catalyst (NPMC); oxygen reduction eaction (ORR); proton-exchange membrane fuel ell (PEMFC); cabron-supported Fe-dopedg-C3N4 (Fe-g C3N4@C); pryrolysis; Fe-N-C composite,GRAPHITIC CARBON NITRIDE; NITROGEN-DOPED GRAPHENE; IRON-BASED CATALYSTS; ELECTROCHEMICAL PROPERTIES; ACTIVE-SITES; ELECTROCATALYSTS; PLATINUM; PERFORMANCE; POLYANILINE; CATHODE,non-precious metal catalyst (NPMC);oxygen reduction eaction (ORR);proton-exchange membrane fuel ell (PEMFC);cabron-supported Fe-dopedg-C3N4 (Fe-g C3N4@C);pryrolysis;Fe-N-C composite;GRAPHITIC CARBON NITRIDE;NITROGEN-DOPED GRAPHENE;IRON-BASED CATALYSTS;ELECTROCHEMICAL PROPERTIES;ACTIVE-SITES;ELECTROCATALYSTS;PLATINUM;PERFORMANCE;POLYANILINE;CATHODE,yangwh@hqu.edu.cn; sgsun@xmu.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2155-5435,,,,English,ACS CATAL,Article,WoS,Chemistry,WOS:000344639300016,2-s2.0-84910038375,China,hqu.edu.cn,Huaqiao Univ;Xiamen Univ;E China Univ Sci & Technol,"Huaqiao Univ, China;Xiamen Univ, China;E China Univ Sci & Technol, China","Wang, Mei-Qing; Yang, Wei-Hua; Wang, Hong-Hui; Chen, Chi; Zhou, Zhi-You; Sun, Shi-Gang"
"Huang, J., Yu, C., Li, J., Xiao, W., Zhong, J.B., Shen, P.K., Tian, Z.Q.",Rare-earth lanthanum-nitrogen-carbon enhanced by abundant microspores for efficient oxygen reduction reaction,2025,Journal of Energy Chemistry,106,,,812,822,,6,10.1016/j.jechem.2025.02.021,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105002492971&doi=10.1016%2Fj.jechem.2025.02.021&partnerID=40&md5=cb6b5608d9884e5d9176522a563fd304,"College of Physics Science and Technology, Guangxi University, Nanning, Guangxi, China; Anhui Absorption Spectroscopy Analysis Instrument Co. Ltd., Hefei, China","Huang, Ji, College of Physics Science and Technology, Guangxi University, Nanning, Guangxi, China; Yu, Cunhuai, College of Physics Science and Technology, Guangxi University, Nanning, Guangxi, China; Li, Jiawang, College of Physics Science and Technology, Guangxi University, Nanning, Guangxi, China; Xiao, Wanling, College of Physics Science and Technology, Guangxi University, Nanning, Guangxi, China; Zhong, Jianbin, Anhui Absorption Spectroscopy Analysis Instrument Co. Ltd., Hefei, China; Shen, Peikang, College of Physics Science and Technology, Guangxi University, Nanning, Guangxi, China; Tian, Zhiqun, College of Physics Science and Technology, Guangxi University, Nanning, Guangxi, China","Transition metal-nitrogen-carbon (M−N−C) with 3d transition metals as noble metal-free catalyzing oxygen reduction reaction (ORR) electrocatalysts still face critical challenges in activity and durability due to the Fenton effect associated with these metals in practical application. To tackle the issue, herein, we report Fenton-inactive rare earth metal La-N-C with dual active sites for efficient ORR, which was synthesized by pyrolyzing a mixed complexing compound of 1,10-phenanthroline as ligand with LaCl<inf>3</inf> and MgCl<inf>2</inf> as an activation agent. The as-synthesized La-N-C features an abundant microporous structure with atomically dispersed LaN<inf>4</inf>O moieties as new active sites, exhibiting outstanding ORR performance. Its half-wave potentials are 0.92 and 0.76 V in 0.1 M KOH and 0.5 M H<inf>2</inf>SO<inf>4</inf> respectively, and only a 10 mV half-wave potential loss after 50 K cycles in 0.1 M KOH, achieving the highest level of current non-3d M−N−C ORR electrocatalysts. Meanwhile, the ORR activity is further validated by efficient performance with a power density output of 211 and 480 mW cm−2 on a single Zn-air battery and proton exchange membrane fuel cell respectively. Furthermore, theoretical calculations confirm that the unique LaN<inf>4</inf>O moiety adjacent to the microspore vacancy with graphitic N dopant not only presents a negative shift of the La 5d orbitals, significantly lowering the adsorption energy of *OOH in ORR, but also induces the carbon atom near the graphitic N as one more active site for ORR. This work highlights the potential application of La-N-C as an efficient ORR catalyst in green energy conversion devices. © 2025 Science Press",Fenton-inactive single La atoms; Fuel cells; Metal-nitrogen-carbon; Oxygen reduction reaction; Zn-Air batteries,Activation energy; Electrolytic reduction; Lanthanum oxides; Magnesium compounds; Mercury compounds; Oxygen reduction reaction; Tungsten compounds; Zinc air batteries; Zinc compounds; 3d transition metals; Active site; Fenton-inactive single la atom; Half-wave potential; Metal free; Metal-nitrogen-carbon; Nitrogen-carbon; Rare earth - lanthanums; Synthesised; Potassium hydroxide,Fenton-inactive single La atoms;Fuel cells;Metal-nitrogen-carbon;Oxygen reduction reaction;Zn-Air batteries;Activation energy;Electrolytic reduction;Lanthanum oxides;Magnesium compounds;Mercury compounds;Tungsten compounds;Zinc air batteries;Zinc compounds;3d transition metals;Active site;Fenton-inactive single la atom;Half-wave potential;Metal free;Nitrogen-carbon;Rare earth - lanthanums;Synthesised;Potassium hydroxide,"Z.Q. Tian; Collaborative Innovation Center of Sustainable Energy Materials, School of Physical Science and Technology, Guangxi Key Laboratory of Electrochemical Energy Materials, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, 530004, China; email: tianzhiqun@gxu.edu.cn",,,,,,Elsevier B.V.,20954956,,,,English,J. Energy Chem.,Article,Scopus,,2-s2.0-105002492971,,China,gxu.edu.cn,,,"Huang, J.; Yu, C.; Li, J.; Xiao, W.; Zhong, J.B.; Shen, P.K.; Tian, Z.Q."
"Tan, H., Tang, J., Kim, J., Kaneti, Y.V., Kang, Y.M., Sugahara, Y., Yamauchi, Y.",Rational design and construction of nanoporous iron- and nitrogen-doped carbon electrocatalysts for oxygen reduction reaction,2019,Journal of Materials Chemistry A,7,4,,1380,1393,,197,10.1039/c8ta08870e,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85060370878&doi=10.1039%2Fc8ta08870e&partnerID=40&md5=85553eb0926966a4db962071ad3d6989,"International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, Tsukuba, Ibaraki, Japan; Key Laboratory of Eco-chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China; School of Chemical Engineering, The University of Queensland, Brisbane, QLD, Australia; Department of Energy and Materials Engineering, Dongguk University, Seoul, Seoul, South Korea; Waseda University, Tokyo, Japan; Waseda University, Tokyo, Japan; Department of Plant and Environmental New Resources, Kyung Hee University, Seoul, South Korea","Tan, Haibo, International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, Tsukuba, Ibaraki, Japan; Tang, Jing, International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, Tsukuba, Ibaraki, Japan; Kim, Jeonghun, Key Laboratory of Eco-chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China, School of Chemical Engineering, The University of Queensland, Brisbane, QLD, Australia; Kaneti, Yusuf Valentino, International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, Tsukuba, Ibaraki, Japan; Kang, Yongmook, Department of Energy and Materials Engineering, Dongguk University, Seoul, Seoul, South Korea; Sugahara, Yoshiyuki, Waseda University, Tokyo, Japan, Waseda University, Tokyo, Japan; Yamauchi, Yusuke, Key Laboratory of Eco-chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China, School of Chemical Engineering, The University of Queensland, Brisbane, QLD, Australia, Department of Plant and Environmental New Resources, Kyung Hee University, Seoul, South Korea","Polymer electrolyte membrane fuel cells (PEMFCs) are one of the most sustainable energy conversion systems because of their high energy conversion efficiency and low/zero emissions. Unfortunately, the utilization of highly active but costly platinum (Pt)-based electrocatalysts is necessary to accelerate the sluggish kinetics of cathodic oxygen reduction in PEMFCs for practical applications. Under such circumstance, enormous efforts have been devoted to the exploration of inexpensive and earth-abundant non-noble metal-based electrocatalysts to replace or reduce the usage of Pt-based electrocatalysts in the past decades. Heteroatom-doped carbon materials are among some of the most promising non-noble metal-based electrocatalysts, especially transition metal- and nitrogen-doped carbon materials. According to previous findings, iron- and nitrogen-doped carbon (Fe-N/C) materials derived using various methodologies showed outstanding electrocatalytic activity and impressive durability. Therefore, tremendous progress has been achieved in the synthesis of Fe-N/C and the identification of active sites for oxygen reduction reaction (ORR). Creating ORR active sites, such as Fe-N <inf>x</inf> , N/C, and Fe <inf>3</inf> C@C moieties, increasing the density of active sites and improving the utilization efficiency of ORR active sites are considered as the most effective steps for enhancing the ORR performance of Fe-N/C electrocatalysts. The creation of nanoporous structure of Fe-N/C electrocatalysts plays critical roles in increasing the number of ORR active sites and exposing abundant accessible ORR active sites to electrolytes. In addition, the interconnected nanopores facilitate the mass transfer of reactants and products inside the carbon matrix during the ORR reactions. Therefore, this review pays specific attention to the design and synthetic strategies of Fe-N/C materials with porous structures and their merits toward ORR. Finally, based on the construction of nanoporous structures, the challenges and perspectives with respect to future development of highly active nanoporous Fe-N/C electrocatalysts are discussed. © 2019 The Royal Society of Chemistry.",,Carbon; Conversion efficiency; Doping (additives); Electrocatalysts; Electrolysis; Electrolytic reduction; Energy conversion; Iron; Mass transfer; Nitrogen; Oxygen; Platinum metals; Polyelectrolytes; Precious metals; Proton exchange membrane fuel cells (PEMFC); Cathodic oxygen reduction; Electrocatalytic activity; High energy conversions; Nitrogen-doped carbons; Oxygen reduction reaction; Polymer electrolyte membrane fuel cell (PEMFCs); Pt-based electrocatalyst; Utilization efficiency; Solid electrolytes,Carbon;Conversion efficiency;Doping (additives);Electrocatalysts;Electrolysis;Electrolytic reduction;Energy conversion;Iron;Mass transfer;Nitrogen;Oxygen;Platinum metals;Polyelectrolytes;Precious metals;Proton exchange membrane fuel cells (PEMFC);Cathodic oxygen reduction;Electrocatalytic activity;High energy conversions;Nitrogen-doped carbons;Oxygen reduction reaction;Polymer electrolyte membrane fuel cell (PEMFCs);Pt-based electrocatalyst;Utilization efficiency;Solid electrolytes,"J. Tang; International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, 1-1 Namiki, 305-0044, Japan; email: TANG.Jing@nims.go.jp",,,,,,Royal Society of Chemistry,20507488,,JMCAE,,English,J. Mater. Chem. A,Review,Scopus,,2-s2.0-85060370878,,Japan;China;Australia;South Korea,nims.go.jp,,,"Tan, H.; Tang, J.; Kim, J.; Kaneti, Y.V.; Kang, Y.-M.; Sugahara, Y.; Yamauchi, Y."
"Tian, N., Lu, B.A., Yang, X.D., Huang, R., Jiang, Y.X., Zhou, Z.Y., Sun, S.G.",Rational Design and Synthesis of Low-Temperature Fuel Cell Electrocatalysts,2018,ELECTROCHEMICAL ENERGY REVIEWS,1,1,,54,83,30,107,10.1007/s41918-018-0004-1,,"[Tian, Na; Lu, Bang-An; Huang, Rui; Jiang, Yan-Xia; Zhou, Zhi-You; Sun, Shi-Gang] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China; [Yang, Xiao-Dong] Huaqiao Univ, Coll Mat Sci & Engn, Xiamen, Fujian, Peoples R China",,"Recent progresses in proton exchange membrane fuel cell electrocatalysts are reviewed in this article in terms of cathodic and anodic reactions with a focus on rational design. These designs are based around gaining active sites using model surface studies and include high-index faceted Pt and Pt-alloy nanocrystals for anodic electrooxidation reactions as well as Pt-based alloy/core-shell structures and carbon-based non-precious metal catalysts for cathodic oxygen reduction reactions (ORR). High-index nanocrystals, alloy nanoparticles, and support effects are highlighted for anodic catalysts, and current developments in ORR electrocatalysts with novel structures and different compositions are emphasized for cathodic catalysts. Active site structures, catalytic performances, and stability in fuel cells are also reviewed for carbon-based non-precious metal catalysts. In addition, further developmental perspectives and the current status of advanced fuel cell electrocatalysts are provided. [GRAPHICS] .",Fuel cells; Platinum; Non-precious metal catalysts; Nanocrystals; Active sites; Electrocatalysis,OXYGEN REDUCTION REACTION; HIGH-INDEX FACETS; FE-N-C; METAL-FREE ELECTROCATALYSTS; PLATINUM-MONOLAYER SHELL; DOPED CARBON ELECTROCATALYSTS; SHAPE-CONTROLLED SYNTHESIS; HIGH-PERFORMANCE; CORE-SHELL; ACTIVE-SITES,Fuel cells;Platinum;Non-precious metal catalysts;Nanocrystals;Active sites;Electrocatalysis;OXYGEN REDUCTION REACTION;HIGH-INDEX FACETS;FE-N-C;METAL-FREE ELECTROCATALYSTS;PLATINUM-MONOLAYER SHELL;DOPED CARBON ELECTROCATALYSTS;SHAPE-CONTROLLED SYNTHESIS;HIGH-PERFORMANCE;CORE-SHELL;ACTIVE-SITES,sgsun@xmu.edu.cn,,"CAMPUS, 4 CRINAN ST, LONDON, N1 9XW, ENGLAND",,,,SPRINGERNATURE,2520-8489,,,,English,ELECTROCHEM ENERGY R,Review,WoS,Electrochemistry,WOS:000562856400003,2-s2.0-85055653190,China,xmu.edu.cn,Xiamen Univ;Huaqiao Univ,"Xiamen Univ, China;Huaqiao Univ, China","Tian, Na; Lu, Bang-An; Yang, Xiao-Dong; Huang, Rui; Jiang, Yan-Xia; Zhou, Zhi-You; Sun, Shi-Gang"
"Chen, C.J., Lai, X., Jian, Y.Q., Zhang, D.K., Huang, W.Y., Chen, J., Xie, F.Y., Jin, Y.S., Lee, M-, Li, G.X., Wang, N., Meng, H., Nazeeruddin, M.K.",Rational Design of Asymmetric FeN3S Single-Atom Sites for eg Orbital Engineering Toward Efficient ORR in PEMFCs,2025,SMALL,,,,,,10,0,10.1002/smll.202508823,,"[Chen, Chengjie; Lai, Xin; Jian, Yongqi; Zhang, Dengke; Jin, Yanshuo; Wang, Nan; Meng, Hui] Jinan Univ, Guangdong Prov Engn Technol Res Ctr Vacuum Coating, Siyuan Lab,Dept Phys,Guangdong Provincial Key Lab, Guangzhou Key Lab Vacuum Coating Technol & New Ene, Guangzhou 510632, Peoples R China; [Chen, Chengjie] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China; [Huang, Wenyu; Chen, Jian; Xie, Fangyan] Sun Yat Sen Univ, Instrumental Anal & Res Ctr, Guangzhou 510275, Guangdong, Peoples R China; [Lee, Ming-hsien] Tamkang Univ, Dept Phys, New Taipei 25137, Taiwan; [Li, Guixiang] Southeast Univ, Sch Mat Sci & Engn, Nanjing 211189, Jiangsu, Peoples R China; [Nazeeruddin, Mohammad Khaja] Ecole Polytech Fed Lausanne EPFL, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland",,"Iron and nitrogen co-doped FeNC catalysts with symmetric Fe-N4 as the active site are the most promising alternative to noble metal catalysts for proton exchange membrane fuel cells (PEMFCs). However, the symmetric structure in the Fe-N4 site endows oxygen intermediates with strong binding energy, which hinders the activity optimization of the active center. In this work, an asymmetric configuration (Fe-N3SC) is constructed to alleviate the electron localization caused by the d-pi conjugation of Fe-N4. The asymmetric configuration can effectively reduce the splitting energy of the Fe-3d orbital, leading to a decrease in the energy barrier for the electrons to fill in the eg orbitals. Increased electron occupancy in the e g orbitals reduces the bond order/adsorption of the oxygen-containing intermediates on the active site, which leads to increased oxygen reduction (ORR) activity. The results of this work highlight the possibility of asymmetric configurations in manipulating and optimizing electron transfer and spin regulation of single-atom catalysts.",asymmetric configuration; eg orbital occupancy; oxygen reduction reaction; proton exchange membrane fuel cell; spin state,OXYGEN REDUCTION REACTION; N-C CATALYSTS; HIGH-PERFORMANCE; ACTIVE-SITES; SPIN-STATE; DENSITY; ELECTROCATALYST,asymmetric configuration;eg orbital occupancy;oxygen reduction reaction;proton exchange membrane fuel cell;spin state;N-C CATALYSTS;HIGH-PERFORMANCE;ACTIVE-SITES;SPIN-STATE;DENSITY;ELECTROCATALYST,guixiang.li@seu.edu.cn; nanwang@E-mail.jnu.edu.cn; tmh@jnu.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1613-6810,,,41268796,English,SMALL,Article; Early Access,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:001619598600001,2-s2.0-105022612524,China;Taiwan;Switzerland,seu.edu.cn,Jinan Univ;Beijing Univ Chem Technol;Sun Yat Sen Univ;Tamkang Univ;Southeast Univ;Ecole Polytech Fed Lausanne EPFL,"Jinan Univ, China;Beijing Univ Chem Technol, China;Sun Yat Sen Univ, China;Tamkang Univ, Taiwan;Southeast Univ, China;Ecole Polytech Fed Lausanne EPFL, Switzerland","Chen, Chengjie; Lai, Xin; Jian, Yongqi; Zhang, Dengke; Huang, Wenyu; Chen, Jian; Xie, Fangyan; Jin, Yanshuo; Lee, Ming-hsien; Li, Guixiang; Wang, Nan; Meng, Hui; Nazeeruddin, Mohammad Khaja"
"Jiang, M., Wang, F., Yang, F., He, H., Yang, J., Zhang, W., Luo, J., Zhang, J., Fu, C.",Rationalization on high-loading iron and cobalt dual metal single atoms and mechanistic insight into the oxygen reduction reaction,2022,Nano Energy,93,,106793,,,,195,10.1016/j.nanoen.2021.106793,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85120890850&doi=10.1016%2Fj.nanoen.2021.106793&partnerID=40&md5=248842b0fa692bdc6152c9b01257546a,"School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China; School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, Hunan, China; Advanced Technology Institute, University of Surrey, Guildford, Surrey, United Kingdom","Jiang, Min, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China; Wang, Fei, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China; Yang, Fan, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; He, Hao, College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, Hunan, China; Yang, Jian, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China; Zhang, Wei, Advanced Technology Institute, University of Surrey, Guildford, Surrey, United Kingdom; Luo, Jiayan, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China; Zhang, Jiao, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China; Fu, Chaopeng, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China","Rational design of single-atom catalysts (SACs) with high metal loadings is essential to enhance the sluggish kinetics of oxygen reduction reactions in metal-air batteries and proton-exchange membrane fuel cells (PEMFCs). Herein, an effective plasma engineering strategy to construct Fe/Co dual single atoms densely dispersed on porous nitrogen-doped carbon nanofibers (Fe, Co SAs-PNCF) with a high mass loading of 9.8 wt% is proposed without any acid leaching. The electrocatalyst exhibits superior ORR performances in both alkaline and acidic media (e.g., E<inf>onset</inf> = 1.04 V and E<inf>1/2</inf> = 0.93 V). The N<inf>3</inf>-Fe-Co-N<inf>3</inf> moieties are identified to be the main active sites by X-ray absorption spectroscopy (XAS) and density functional theory calculations. The in situ XAS and Raman spectroscopy quantitively reveal the decrease in oxidation states of Fe/Co and the increase in bond lengths of the Fe-N/Co-N in the N<inf>3</inf>-Fe-Co-N<inf>3</inf> during the ORR. Benefitting from the high loading of single atoms and enhanced activity, the Fe, Co SAs-PNCF endows the Al-air batteries and PEMFCs with excellent discharge performances, demonstrating promising practical applications. © 2021 Elsevier Ltd",Al-air battery; Dual sites; Mechanism; Oxygen reduction reaction; Single atom,Atoms; Carbon nanofibers; Cobalt; Doping (additives); Electrocatalysts; Electrolytic reduction; Iron; Loading; Nitrogen; Nitrogen plasma; Oxygen; Proton exchange membrane fuel cells (PEMFC); X ray absorption spectroscopy; Dual metals; Dual sites; High loadings; Mechanistics; Oxygen reduction reaction; Proton-exchange membranes fuel cells; Rational design; Rationalisation; Single-atoms; ]+ catalyst; Density functional theory,Al-air battery;Dual sites;Mechanism;Oxygen reduction reaction;Single atom;Atoms;Carbon nanofibers;Cobalt;Doping (additives);Electrocatalysts;Electrolytic reduction;Iron;Loading;Nitrogen;Nitrogen plasma;Oxygen;Proton exchange membrane fuel cells (PEMFC);X ray absorption spectroscopy;Dual metals;High loadings;Mechanistics;Proton-exchange membranes fuel cells;Rational design;Rationalisation;Single-atoms;]+ catalyst;Density functional theory,"J. Yang; School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; email: tracyang@sjtu.edu.cn",,,,,,Elsevier Ltd,22112855,,,,English,Nano Energy,Article,Scopus,,2-s2.0-85120890850,,China;United Kingdom,sjtu.edu.cn,,,"Jiang, M.; Wang, F.; Yang, F.; He, H.; Yang, J.; Zhang, W.; Luo, J.; Zhang, J.; Fu, C."
"Xu, H., Ma, Z., Wan, Z., An, Z., Wang, X.",Recent advances and prospects of iron-based noble metal-free catalysts for oxygen reduction reaction in acidic environment: A mini review,2024,International Journal of Hydrogen Energy,59,,,697,714,,17,10.1016/j.ijhydene.2024.02.027,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85184613027&doi=10.1016%2Fj.ijhydene.2024.02.027&partnerID=40&md5=5b5d607f0b6bd061233f08dbc243ff54,"Laboratory of Advanced Materials and Energy Electrochemistry, Taiyuan University of Technology, Taiyuan, Shanxi, China; College of Chemistry, Taiyuan University of Technology, Taiyuan, Shanxi, China; Taiyuan University of Technology, Taiyuan, Shanxi, China","Xu, Hongfei, Laboratory of Advanced Materials and Energy Electrochemistry, Taiyuan University of Technology, Taiyuan, Shanxi, China; Ma, Zizai, Laboratory of Advanced Materials and Energy Electrochemistry, Taiyuan University of Technology, Taiyuan, Shanxi, China, College of Chemistry, Taiyuan University of Technology, Taiyuan, Shanxi, China; Wan, Zihao, Laboratory of Advanced Materials and Energy Electrochemistry, Taiyuan University of Technology, Taiyuan, Shanxi, China; An, Zhen, Laboratory of Advanced Materials and Energy Electrochemistry, Taiyuan University of Technology, Taiyuan, Shanxi, China; Wang, Xiaoguang, Laboratory of Advanced Materials and Energy Electrochemistry, Taiyuan University of Technology, Taiyuan, Shanxi, China, Taiyuan University of Technology, Taiyuan, Shanxi, China","The oxygen reduction reaction (ORR) occurred in acidic media, as the cathode reaction of proton exchange membrane fuel cells (PEMFCs) with great commercialization potential, has attracted much attention. However, the slow kinetics of ORR and the high cost of cathode catalysts (mainly platinum (Pt)-based materials in current) have become the main obstacle to the rapid development of PEMFCs. Therefore, the exploration of efficient and inexpensive non-precious metal-based ORR catalysts has emerged as an urgent issue. Non-noble transition metal-based materials have been widely investigated as ORR catalysts in acidic media. This review focused on the investigation of iron (Fe) based catalysts in acidic ORR processes. In this review, the ORR mechanism was first introduced. Subsequently, the fabrication method of Fe-based catalysts by co-pyrolysis of mixtures containing Fe, non-metal, and organic precursors was discussed. Finally, the recent advances of Fe-based materials (carbides, nitrides, oxides, phosphides, chalcogenides, hybrids, alloys and single atom catalysts) as acidic ORR catalysts were summarized, and mainly focused on catalytic performance, stability and catalytic mechanism studies with Density Functional Theory (DFT) calculation. Finally, the challenges and future perspectives of Fe-based catalysts were also proposed. © 2024 Hydrogen Energy Publications LLC",Acidic media; Catalytic performance; Fe-based catalysts; Oxygen reduction reaction,,Acidic media;Catalytic performance;Fe-based catalysts;Oxygen reduction reaction,"X. Wang; Laboratory of Advanced Materials and Energy Electrochemistry, Institute of New Carbon Materials, College of Materials Science & Engineering, Taiyuan University of Technology, Taiyuan, 030024, China; email: wangxiaog1982@163.com",,,,,,Elsevier Ltd,03603199,0080311393,IJHED,,English,Int J Hydrogen Energy,Review,Scopus,,2-s2.0-85184613027,,China,163.com,,,"Xu, H.; Ma, Z.; Wan, Z.; An, Z.; Wang, X."
"Wan, Z.H., Liu, F., Xu, H.F., Zhao, S.L., An, Z., Ma, Z.Z., Zhang, Z.H., Wu, Y., Wang, X.G.",Recent advances and trends of single-atom catalysts for proton exchange membrane fuel cell cathodes,2024,CHEMPHYSMATER,3,2,,143,156,14,9,10.1016/j.chphma.2023.12.002,,"[Wan, Zihao; Xu, Hongfei; Zhao, Shuaili; An, Zhen; Wang, Xiaoguang] Taiyuan Univ Technol, Inst New Carbon Mat, Coll Mat Sci & Engn, Lab Adv Mat & Energy Electrochem, Taiyuan 030024, Peoples R China; [Liu, Feng] Datong Innoreagen Power Technol Co Ltd, Datong 037000, Peoples R China; [Ma, Zizai] Taiyuan Univ Technol, Coll Chem, Taiyuan 030024, Peoples R China; [Ma, Zizai; Wang, Xiaoguang] Taiyuan Univ Technol, Shanxi Key Lab Gas Energy Efficient & Clean Utiliz, Taiyuan 030024, Peoples R China; [Zhang, Zhonghua] Shandong Univ, Sch Mat Sci & Engn, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Peoples R China; [Wu, Yun] Guangdong Univ Petrochem Technol, Dept Mat Sci & Engn, Maoming 525000, Peoples R China",,"Proton exchange membrane fuel cells (PEMFCs), which have the advantages of high-power density, zero emission, and low noise, are considered ideal electrochemical conversion systems for converting hydrogen (H2 ) and oxygen (O2 )/air into electricity. However, the oxygen reduction reaction (ORR), which is accompanied by multiple electrons, results in voltage loss and low conversion efficiency of PEMFCs. Currently, PEMFCs mainly use highload precious platinum (Pt) to promote the ORR process; however, the high cost of Pt hinders the widespread commercialization of PEMFCs. Over the past few years, metal-nitrogen-carbon single-atom catalysts (M-N-C SACs) have attracted considerable attention and have been recognized as potential Pt-based catalysts owing to their outstanding ORR activity. This review briefly introduces the components of PEMFCs. Second, we discuss the catalytic mechanisms of the M-N-C SACs for the ORR. Third, the latest advances in noble, non-noble, and heteroatom-doped M-N-C SACs used as ORR and PEMFCs cathode catalysts are systematically reviewed. In summary, we have outlined the current challenges and proposed a future perspective of M-N-C SACs for PEMFCs cathodes.",Proton exchange membrane fuel cells; Oxygen reduction reaction; Cathode; Platinum-based catalysts; Metal-nitrogen-carbon single-atom catalysts,OXYGEN REDUCTION REACTION; CO; CARBON; MECHANISMS; BATTERIES; SPHERES; SYSTEM; PEMFC; MN,Proton exchange membrane fuel cells;Oxygen reduction reaction;Cathode;Platinum-based catalysts;Metal-nitrogen-carbon single-atom catalysts;CO;CARBON;MECHANISMS;BATTERIES;SPHERES;SYSTEM;PEMFC;MN,mazizai@tyut.edu.cn; zh_zhang@sdu.edu.cn; wangxiaog1982@163.com,,"16 DONGHUANGCHENGGEN NORTH ST, Building 5, Room 411, BEIJING, DONGCHENG DISTRICT 100009, PEOPLES R CHINA",,,,KEAI PUBLISHING LTD,2097-0323,,,,English,CHEMPHYSMATER,Review,WoS,Chemistry; Materials Science,WOS:001478137300001,2-s2.0-85181900392,China,tyut.edu.cn,Taiyuan Univ Technol;Datong Innoreagen Power Technol Co Ltd;Shandong Univ;Guangdong Univ Petrochem Technol,"Taiyuan Univ Technol, China;Datong Innoreagen Power Technol Co Ltd, China;Shandong Univ, China;Guangdong Univ Petrochem Technol, China","Wan, Zihao; Liu, Feng; Xu, Hongfei; Zhao, Shuaili; An, Zhen; Ma, Zizai; Zhang, Zhonghua; Wu, Yun; Wang, Xiaoguang"
"Liu, J., Jin, Z., Wang, X., Ge, J., Liu, C., Xing, W.",Recent advances in active sites identification and regulation of M-N/C electro-catalysts towards ORR,2019,Science China Chemistry,62,6,,669,683,,48,10.1007/s11426-018-9425-5,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85067076869&doi=10.1007%2Fs11426-018-9425-5&partnerID=40&md5=050b9b0fe9767b87d5cbbb5e17d9390b,"State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; University of Science and Technology of China, Hefei, Anhui, China; Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Jilin Province Key Laboratory of Low Carbon Chemical Power Sources, Changchun, Jilin, China","Liu, Jie, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, University of Science and Technology of China, Hefei, Anhui, China; Jin, Zhao, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, Jilin Province Key Laboratory of Low Carbon Chemical Power Sources, Changchun, Jilin, China; Wang, Xian, University of Science and Technology of China, Hefei, Anhui, China, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, Jilin Province Key Laboratory of Low Carbon Chemical Power Sources, Changchun, Jilin, China; Ge, Junjie, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, Jilin Province Key Laboratory of Low Carbon Chemical Power Sources, Changchun, Jilin, China; Liu, Changpeng, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, Jilin Province Key Laboratory of Low Carbon Chemical Power Sources, Changchun, Jilin, China; Xing, Wei, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, Jilin Province Key Laboratory of Low Carbon Chemical Power Sources, Changchun, Jilin, China","Transition metal and nitrogen co-doped carbon (M-N/C) catalysts are recognized as the most prospective alternatives for platinum-based electro-catalysts towards oxygen reduction reaction (ORR) in polymer electrolyte fuel cells. Recently, significant progress has been achieved in the identification and regulation of active sites of this kind of catalysts. In this mini review, we summarize the techniques and strategies to identify active sites in M-N/C catalysts, the main debates on active sites types, the measurement method for active site density, the reactivity descriptors for M-N/C catalysts, and directions to the design of ORR M-N/C catalysts. © 2019, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.",active sites; electro-catalysts; M-N/C; ORR,Electrolytic reduction; Fuel cells; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Transition metals; Active site; Active site density; Co-doped; M-N/C; Measurement methods; Oxygen reduction reaction; Polymer electrolyte fuel cells; Reactivity descriptors; Catalyst activity,active sites;electro-catalysts;M-N/C;ORR;Electrolytic reduction;Fuel cells;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Transition metals;Active site;Active site density;Co-doped;Measurement methods;Oxygen reduction reaction;Polymer electrolyte fuel cells;Reactivity descriptors;Catalyst activity,"W. Xing; State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: xingwei@ciac.ac.cn",,,,,,Science in China Press csb@scichina.com,16747291,,SCCCC,,English,Sci. China Chem.,Review,Scopus,,2-s2.0-85067076869,,China,ciac.ac.cn,,,"Liu, J.; Jin, Z.; Wang, X.; Ge, J.; Liu, C.; Xing, W."
"Zhao, Z., Zhan, L., Guo, P., Dai, Y., Shen, L., Zhang, Y., Wang, G., Wang, Z., Zhao, L.",Recent advances in atomically dispersed M-N-C coupled Pt-based oxygen reduction catalysts,2024,Sustainable Energy and Fuels,9,1,,10,27,,7,10.1039/d4se01397b,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85210965407&doi=10.1039%2Fd4se01397b&partnerID=40&md5=74c4cbd14aa351492430776c746d14ba,"Key Laboratory of Superlight Materials and Surface Technology, Harbin Engineering University, Harbin, Heilongjiang, China; School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Guangdong Research Center for Interfacial Engineering of Functional Materials, Shenzhen University, Shenzhen, Guangdong, China","Zhao, Zigang, Key Laboratory of Superlight Materials and Surface Technology, Harbin Engineering University, Harbin, Heilongjiang, China, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Zhan, Lezhi, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Guo, Pan, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Dai, Yunkun, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Shen, Lixiao, Guangdong Research Center for Interfacial Engineering of Functional Materials, Shenzhen University, Shenzhen, Guangdong, China; Zhang, Yunlong, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Wang, Guiling, Key Laboratory of Superlight Materials and Surface Technology, Harbin Engineering University, Harbin, Heilongjiang, China; Wang, Zhenbo, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China, Guangdong Research Center for Interfacial Engineering of Functional Materials, Shenzhen University, Shenzhen, Guangdong, China; Zhao, Lei, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China","Proton exchange membrane fuel cells have garnered significant attention as a sustainable energy conversion technology amidst the escalating consumption of fossil fuels. Although Pt-based catalysts are effective in oxygen reduction reactions, their limited availability and high Pt content pose challenges to the wide adoption of PEMFCs. Improving the activity and durability of Pt-based catalysts is essential for lowering Pt consumption, cutting costs, and increasing the fuel cell's efficiency and power density. Recently, atomically dispersed metal-nitrogen-carbon (M-NC) coupled platinum-based catalysts have received attention as highly promising options due to their superior performance and stability. This review explores the advancements in M-NC coupled platinum-based catalysts, encompassing various supports, alloys, and intermetallic compounds. The optimization strategies for these catalysts, spanning preparation methods, structural composition, and catalytic efficacy, are also discussed. In addition, this review discusses the comprehensive optimization strategy of the M-NC coupled platinum-based oxygen reduction catalyst, focusing on various aspects such as the preparation process, structural composition, and catalytic performance. Additionally, we offer insights into the future advancement of M-NC coupled platinum-based oxygen reduction catalysts, emphasizing this method as a potential avenue to enhance efficiency. © 2025 The Royal Society of Chemistry.",,Indium phosphide; Metal cutting; Oxygen cutting; Platinum; Platinum alloys; Platinum compounds; Structural optimization; Energy conversion technologies; Nitrogen-carbon; Optimization strategy; Oxygen reduction catalysts; Oxygen reduction reaction; Platinum based catalyst; Proton-exchange membranes fuel cells; Pt-based catalyst; Structural composition; Sustainable energy; Electrolytic reduction; alternative energy; catalysis; catalyst; durability; fuel cell; optimization; oxygen; platinum; reduction,Indium phosphide;Metal cutting;Oxygen cutting;Platinum;Platinum alloys;Platinum compounds;Structural optimization;Energy conversion technologies;Nitrogen-carbon;Optimization strategy;Oxygen reduction catalysts;Oxygen reduction reaction;Platinum based catalyst;Proton-exchange membranes fuel cells;Pt-based catalyst;Structural composition;Sustainable energy;Electrolytic reduction;alternative energy;catalysis;catalyst;durability;fuel cell;optimization;oxygen;reduction,; ; ; ; ,,,,,,Royal Society of Chemistry,,,,,English,Sustain. Energy Fuels,Review,Scopus,,2-s2.0-85210965407,,China,No email,,,"Zhao, Z.; Zhan, L.; Guo, P.; Dai, Y.; Shen, L.; Zhang, Y.; Wang, G.; Wang, Z.; Zhao, L."
"Xiao, F., Wang, Y.C., Wu, Z.P., Chen, G.Y., Yang, F., Zhu, S.Q., Siddharth, K., Kong, Z.J., Lu, A.L., Li, J.C., Zhong, C.J., Zhou, Z.Y., Shao, M.H.",Recent Advances in Electrocatalysts for Proton Exchange Membrane Fuel Cells and Alkaline Membrane Fuel Cells,2021,ADVANCED MATERIALS,33,50,2006292,,,38,561,10.1002/adma.202006292,,"[Xiao, Fei; Chen, Guangyu; Yang, Fei; Zhu, Shangqian; Siddharth, Kumar; Shao, Minhua] Hong Kong Univ Sci & Technol, Dept Chem & Biol Engn, Kowloon, Clear Water Bay, Hong Kong, Peoples R China; [Wang, Yu-Cheng; Zhou, Zhi-You] Xiamen Univ, Coll Chem & Chem Engn, Innovat Ctr Chem Energy Mat, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China; [Wu, Zhi-Peng; Kong, Zhijie; Lu, Aolin; Zhong, Chuan-Jian] SUNY Binghamton, Dept Chem, Binghamton, NY 13902 USA; [Chen, Guangyu; Li, Jin-Cheng; Shao, Minhua] Hong Kong Univ Sci & Technol, Fok Ying Tung Res Inst, Guangzhou 511458, Peoples R China; [Shao, Minhua] Hong Kong Univ Sci & Technol, Energy Inst, Kowloon, Clear Water Bay, Hong Kong, Peoples R China; [Shao, Minhua] Hong Kong Univ Sci & Technol, Chinese Natl Engn Res Ctr Control & Treatment Hea, Kowloon, Clear Water Bay, Hong Kong, Peoples R China; [Shao, Minhua] HKUST Shenzhen Res Inst, 9 Yuexing 1st RD,South Area,Hitech Pk, Shenzhen 518057, Peoples R China",,"The rapid progress of proton exchange membrane fuel cells (PEMFCs) and alkaline exchange membrane fuel cells (AMFCs) has boosted the hydrogen economy concept via diverse energy applications in the past decades. For a holistic understanding of the development status of PEMFCs and AMFCs, recent advancements in electrocatalyst design and catalyst layer optimization, along with cell performance in terms of activity and durability in PEMFCs and AMFCs, are summarized here. The activity, stability, and fuel cell performance of different types of electrocatalysts for both oxygen reduction reaction and hydrogen oxidation reaction are discussed and compared. Research directions on the further development of active, stable, and low-cost electrocatalysts to meet the ultimate commercialization of PEMFCs and AMFCs are also discussed.",anion exchange membrane fuel cells; fuel cell electrocatalysts; hydrogen oxidation reactions; nonprecious metal electrocatalysts; oxygen reduction reactions,OXYGEN REDUCTION REACTION; HYDROGEN OXIDATION REACTION; NITROGEN-DOPED CARBON; FE-N-C; CORE-SHELL NANOPARTICLES; NONPRECIOUS METAL ELECTROCATALYSTS; ONE-POT SYNTHESIS; HIGH-PERFORMANCE ELECTROCATALYSTS; DUAL FUNCTIONAL ELECTROCATALYSTS; STEPPED PLATINUM SURFACES,anion exchange membrane fuel cells;fuel cell electrocatalysts;hydrogen oxidation reactions;nonprecious metal electrocatalysts;oxygen reduction reactions;OXYGEN REDUCTION REACTION;HYDROGEN OXIDATION REACTION;NITROGEN-DOPED CARBON;FE-N-C;CORE-SHELL NANOPARTICLES;ONE-POT SYNTHESIS;HIGH-PERFORMANCE ELECTROCATALYSTS;DUAL FUNCTIONAL ELECTROCATALYSTS;STEPPED PLATINUM SURFACES,cjzhong@binghamton.edu; zhouzy@xmu.edu.cn; kemshao@ust.hk,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,0935-9648,,,33749011,English,ADV MATER,Review,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000630958700001,,China;United States,binghamton.edu,Hong Kong Univ Sci & Technol;Xiamen Univ;SUNY Binghamton;HKUST Shenzhen Res Inst,"Hong Kong Univ Sci & Technol, China;Xiamen Univ, China;SUNY Binghamton, United States;HKUST Shenzhen Res Inst, China","Xiao, Fei; Wang, Yu-Cheng; Wu, Zhi-Peng; Chen, Guangyu; Yang, Fei; Zhu, Shangqian; Siddharth, Kumar; Kong, Zhijie; Lu, Aolin; Li, Jin-Cheng; Zhong, Chuan-Jian; Zhou, Zhi-You; Shao, Minhua"
"Li, Y., Chen, M.Y., Lu, B.A., Zhang, J.N.",Recent Advances in Exploring Highly Active & Durable PGM-Free Oxygen Reduction Catalysts,2023,Journal of Electrochemistry,29,1,2215002,,,,20,10.13208/j.electrochem.2215002,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85163757573&doi=10.13208%2Fj.electrochem.2215002&partnerID=40&md5=92b8b3e299436b92c61c4fa23f11fbc4,"College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China","Li, Yuan, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Chen, Miaoying, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Lu, Bangan, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China; Zhang, Jianan, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, China","In order to reduce the considerable usage of expensive but scarce platinum at the cathode in proton exchange membrane fuel cells (PEMFCs), it is necessary to pursue alternatives to platinum. The most promising platinum group metal (PGM)-free catalysts for oxygen reduction reaction (ORR) are atomically dispersed, and nitrogen-coordinated metal site catalysts denoted as M-N-C (M ¼ Fe, Co, or Mn, etc.). Over the last few decades, there have been great advances in these catalysts with high ORR activity and promising initial fuel cell performance approaching traditional Pt/C catalysts. However, the stability of these highly active Fe-N-C catalysts under practical fuel cell conditions is still far from satisfactory. This review highlights recent advances in synthesizing efficient PGM-free catalysts for the ORR in PEMFCs, emphasizing our efforts on confinement strategies and spin state regulation methods. We also summarize several effective methods of improving mass and intrinsic activities. Furthermore, significant research efforts toward understanding the degradation mechanisms are made and the results are summarized, such as metal leaching, carbon corrosion, protonation, and micropore flooding. We also document several mitigation strategies to improve the lifetime of PGM-free catalysts, including controlling S1/S2 in Fe-N-C catalysts, using non-iron-based catalysts, enhancing metal-nitrogen bonds, improving the corrosion resistance of carbon carriers, and using buffered protonated liquids. Finally, the remaining challenges and possible solutions to the current atomic dispersion M-N-C catalyst are proposed in detail. © 2023 Authors. All rights reserved.",Confinement strategy; Degradation mechanism; Mitigation strategy; PGM-free catalyst; Spin state regulation,,Confinement strategy;Degradation mechanism;Mitigation strategy;PGM-free catalyst;Spin state regulation,"B.-A. Lu; College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China; email: balu@zzu.edu.cn; J.-N. Zhang; College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China; email: zjn@zzu.edu.cn",,,,,,Chinese Chemical Society,10063471,,,,English,J. Electrochem.,Review,Scopus,,2-s2.0-85163757573,,China,zzu.edu.cn,,,"Li, Y.; Chen, M.-Y.; Lu, B.-A.; Zhang, J.-N."
"Sun, T., Tian, B.B., Lu, J., Su, C.L.",Recent advances in Fe (or Co)/N/C electrocatalysts for the oxygen reduction reaction in polymer electrolyte membrane fuel cells,2017,JOURNAL OF MATERIALS CHEMISTRY A,5,36,,18933,18950,18,163,10.1039/c7ta04915c,,"[Sun, Tao; Tian, Bingbing; Lu, Jiong; Su, Chenliang] Shenzhen Univ, Coll Optoelect Engn, SZU NUS Collaborat Ctr, Shenzhen 518060, Peoples R China; [Sun, Tao; Tian, Bingbing; Lu, Jiong; Su, Chenliang] Shenzhen Univ, Coll Optoelectron Engn, Int Collaborat Lab 2D Mat Optoelectron Sci & Tech, Shenzhen 518060, Peoples R China; [Sun, Tao; Lu, Jiong] Natl Univ Singapore, Dept Chem, 3 Sci Dr 3, Singapore 117543, Singapore",,"Exploring cheap and stable electrocatalysts to replace Pt for the oxygen reduction reaction (ORR) is now the key issue for the large-scale application of fuel cells, especially polymer electrolyte membrane fuel cells. The recent emergence of Fe (or Co)/N/C catalysts has created tremendous opportunities for the development of non-precious metal catalysts for ORR in acidic media and thus presents great potential in the application of fuel cells. In this review, we summarize the recent advances in the Fe (or Co)/N/C catalysts for ORR in acidic media that have demonstrated comparable activity to the commercial Pt catalyst. The synthesis, structural characterization and underlying mechanism of Fe (or Co)/N/C catalysts are discussed. In addition, we highlight the interesting microstructures of the active site, new synthesis approaches, and the catalytic performances tuned by nonmetal heteroatom dopants. Finally, perspectives on the challenges and future opportunities are also discussed.",,NITROGEN-DOPED CARBON; DENSITY-FUNCTIONAL-THEORY; NONPRECIOUS METAL ELECTROCATALYSTS; ACTIVE-SITES; N-X; TRANSITION-METAL; FE/N/C-CATALYSTS; EFFICIENT ELECTROCATALYSTS; N/C ELECTROCATALYSTS; MESOPOROUS CARBON,NITROGEN-DOPED CARBON;DENSITY-FUNCTIONAL-THEORY;NONPRECIOUS METAL ELECTROCATALYSTS;ACTIVE-SITES;N-X;TRANSITION-METAL;FE/N/C-CATALYSTS;EFFICIENT ELECTROCATALYSTS;N/C ELECTROCATALYSTS;MESOPOROUS CARBON,chmsuc@szu.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Review,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000411232100002,2-s2.0-85029617523,China;Singapore,szu.edu.cn,Shenzhen Univ;Natl Univ Singapore,"Shenzhen Univ, China;Natl Univ Singapore, Singapore","Sun, Tao; Tian, Bingbing; Lu, Jiong; Su, Chenliang"
"Liu, K.H., Zhong, H.X., Meng, F.L., Zhang, X.B., Yan, J.M., Jiang, Q.",Recent advances in metal-nitrogen-carbon catalysts for electrochemical water splitting,2017,MATERIALS CHEMISTRY FRONTIERS,1,11,,2155,2173,19,129,10.1039/c7qm00119c,,"[Liu, Kaihua; Zhong, Haixia; Meng, Fanlu; Zhang, Xinbo] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Jilin, Peoples R China; [Liu, Kaihua; Meng, Fanlu; Yan, Junmin; Jiang, Qing] Jilin Univ, Minist Educ, Key Lab Automobile Mat, Changchun 130022, Jilin, Peoples R China; [Liu, Kaihua; Meng, Fanlu; Yan, Junmin; Jiang, Qing] Jilin Univ, Coll Mat Sci & Engn, Changchun 130022, Jilin, Peoples R China",,"The urgent need for clean and renewable energy and environmental awareness have promoted extensive research into creating a future sustainable energy supply system. Water electrolysis, considered the most promising technology for hydrogen production, has attracted much attention. A series of metal-nitrogencarbon based heterogeneous electrocatalysts have been developed for HER and OER. Recent advances in this field are summarized here, including their structures, synthetic methods and especially highlighting the applications of several major kinds of catalysts in water splitting. Finally, the existing key challenges and research directions for enhancing performance are pointed out.",,HYDROGEN-EVOLUTION REACTION; OXYGEN REDUCTION REACTION; N-DOPED CARBON; LITHIUM-ION BATTERIES; EFFICIENT BIFUNCTIONAL ELECTROCATALYST; HOLLOW MICRO-/NANOSTRUCTURES; PEM FUEL-CELLS; ZN-AIR BATTERY; HIGH-PERFORMANCE; ORGANIC FRAMEWORK,HYDROGEN-EVOLUTION REACTION;OXYGEN REDUCTION REACTION;N-DOPED CARBON;LITHIUM-ION BATTERIES;EFFICIENT BIFUNCTIONAL ELECTROCATALYST;HOLLOW MICRO-/NANOSTRUCTURES;PEM FUEL-CELLS;ZN-AIR BATTERY;HIGH-PERFORMANCE;ORGANIC FRAMEWORK,xbzhang@ciac.ac.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,,,,,English,MATER CHEM FRONT,Review,WoS,Chemistry; Materials Science,WOS:000413892500001,,China,ciac.ac.cn,Chinese Acad Sci;Jilin Univ,"Chinese Acad Sci, China;Jilin Univ, China","Liu, Kaihua; Zhong, Haixia; Meng, Fanlu; Zhang, Xinbo; Yan, Junmin; Jiang, Qing"
"Li, X., Popov, B.N., Kawahara, T., Yanagi, H.",Recent advances in non-precious metal catalysts for oxygen reduction reaction in fuel cells,2010,ECS Transactions,33,1 PART 2,,1769,1776,,4,10.1149/1.3484666,https://www.scopus.com/inward/record.uri?eid=2-s2.0-79952676047&doi=10.1149%2F1.3484666&partnerID=40&md5=bd04415bf02a72a1f77aedb912ceb87e,"Center for Electrochemical Engineering, Molinaroli College of Engineering and Computing, Columbia, SC, United States; Corporate Development Dept., Tokuyama Corporation, Chiyoda-ku, Tokyo, Japan","Li, Xuguang, Center for Electrochemical Engineering, Molinaroli College of Engineering and Computing, Columbia, SC, United States; Popov, Branko N., Center for Electrochemical Engineering, Molinaroli College of Engineering and Computing, Columbia, SC, United States; Kawahara, Takeo, Corporate Development Dept., Tokuyama Corporation, Chiyoda-ku, Tokyo, Japan; Yanagi, Hiroyuki, Corporate Development Dept., Tokuyama Corporation, Chiyoda-ku, Tokyo, Japan",Non-precious metal catalysts (NPMCs) are developed for oxygen reduction in alkaline fuel cell (AFC). The performance of the catalyst in alkaline electrolyte is studied by rotating disk electrode (RDE). The NPMC prepared with carbon-supported metal-nitrogen composite precursor and subjected to heat-treatment shows comparable activity for oxygen reduction when compared with Pt/C catalyst. The fuel cell performance of the catalyst was studied using anion exchange membrane (AEM) from Tokuyama Corporation. The NPMC exhibits an open circuit potential (OCP) of 0.97 V and a maximum power density of 177 mW cm-2 at 50°C. ©The Electrochemical Society.,,Alkaline electrolytes; Anion exchange membrane; Fuel cell performance; Maximum power density; Open circuit potential; Oxygen Reduction; Oxygen reduction reaction; Precious metal catalysts; Rotating disk electrodes; Supported metals; Catalysts; Oxygen; Polyelectrolytes; Precious metals; Proton exchange membrane fuel cells (PEMFC); Rotating disks; Electrolytic reduction,Alkaline electrolytes;Anion exchange membrane;Fuel cell performance;Maximum power density;Open circuit potential;Oxygen Reduction;Oxygen reduction reaction;Precious metal catalysts;Rotating disk electrodes;Supported metals;Catalysts;Oxygen;Polyelectrolytes;Precious metals;Proton exchange membrane fuel cells (PEMFC);Rotating disks;Electrolytic reduction,,,,"10th Polymer Electrolyte Fuel Cell Symposium, PEFC 10 - 218th ECS Meeting",,,,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-79952676047,,United States;Japan,No email,,,"Li, X.; Popov, B.N.; Kawahara, T.; Yanagi, H."
"Cui, J., Chen, Q., Li, X., Zhang, S.","Recent advances in non-precious metal electrocatalysts for oxygen reduction in acidic media and PEMFCs: An activity, stability and mechanism study",2021,Green Chemistry,23,18,,6898,6925,,58,10.1039/d1gc01040a,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85115703982&doi=10.1039%2Fd1gc01040a&partnerID=40&md5=57e9a3804779943e1c1ff643462024b3,"Institute of Process Engineering Chinese Academy of Sciences, Beijing, Beijing, China; School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, China; Chinese Academy of Sciences, Beijing, Beijing, China; Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China; Qingdao Institute of Bioenergy and Bioprocess Technology, Qingdao, Shandong, China","Cui, Jiayao, Institute of Process Engineering Chinese Academy of Sciences, Beijing, Beijing, China, School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, China; Chen, Qingjun, Institute of Process Engineering Chinese Academy of Sciences, Beijing, Beijing, China, Chinese Academy of Sciences, Beijing, Beijing, China, Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China; Li, Xiaojin, Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China, Qingdao Institute of Bioenergy and Bioprocess Technology, Qingdao, Shandong, China; Zhang, Suo-Jiang, Institute of Process Engineering Chinese Academy of Sciences, Beijing, Beijing, China","The high cost and limited supply of platinum has driven intensive research into the use of non-platinum group metals (PGM-free) as cathode oxygen reduction reaction (ORR) catalysts for proton exchange membrane fuel cells (PEMFCs), which is crucial in promoting the large-scale applications of PEMFCs and the most important step to achieve the DOE ultimate stack cost target. As the most promising group of PGM-free ORR catalysts, the metal/N/C (M-N-C) catalysts have been extensively explored. However, several problems still exist in the development of high-performance M/N/C catalysts, including limited intrinsic activity and durability, severe concentration polarization and ohmic polarization. Therefore, our aim is to conduct a comprehensive understanding and recognize the strengths and weaknesses of the state-of-the-art PGM-free ORR catalysts for PEMFCs. Herein, we summarize three classes of the most active M/N/C ORR catalysts, namely, conductive PANI-based catalysts and their analogues, ZIFs-based catalysts and their derivatives, and other high-performance ORR catalysts, thoroughly expound their deactivation mechanisms, and deeply discuss the oxygen reduction mechanisms and approaches for identifying active sites. The challenges and perspectives on PGM-free cathode catalysts of PEMFCs are also discussed. © 2021 The Royal Society of Chemistry.",,Catalyst activity; Cathodes; Electrocatalysts; Electrolytic reduction; Oxygen supply; Platinum; Polarization; Acidic media; Acidic proton; Free oxygen; Medium exchange; Non-precious metals; Oxygen Reduction; Oxygen reduction reaction; Performance; Proton-exchange membranes fuel cells; ]+ catalyst; Proton exchange membrane fuel cells (PEMFC),Catalyst activity;Cathodes;Electrocatalysts;Electrolytic reduction;Oxygen supply;Platinum;Polarization;Acidic media;Acidic proton;Free oxygen;Medium exchange;Non-precious metals;Oxygen Reduction;Oxygen reduction reaction;Performance;Proton-exchange membranes fuel cells;]+ catalyst;Proton exchange membrane fuel cells (PEMFC),"Q. Chen; CAS Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; email: qjchen@ipe.ac.cn; S. Zhang; CAS Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; email: sjzhang@ipe.ac.cn",,,,,,Royal Society of Chemistry,14639262,9781613248775,GRCHF,,English,Green Chem.,Review,Scopus,,2-s2.0-85115703982,,China,ipe.ac.cn,,,"Cui, J.; Chen, Q.; Li, X.; Zhang, S."
"Lefevre, M., Dodelet, J.P.",Recent Advances in Non-precious Metal Electrocatalysts for Oxygen Reduction in PEM Fuel Cells,2012,TUTORIALS ON ELECTROCATALYSIS IN LOW TEMPERATURE FUEL CELLS,45,2,,35,44,10,35,10.1149/1.3701967,,"[Lefevre, M.] Canet Electrocatalysis Inc, 1650 Blvd Lionel Boulet, Varennes, PQ J3X 1S2, Canada; [Dodelet, J. P.] INRS, Energie Mat Telecommun, Varennes, PQ, Canada",,"Polymer electrolyte membrane fuel cells (PEMFC) are electrical power generators for a wide range of possible applications, but are still considered too expensive for many. To reduce their cost, much research has focused on replacing the expensive Pt-based electrocatalysts in PEMFCs with a lower-cost alternative. Fe-based cathode catalysts are a promising alternative. To compete with Pt-based cathode catalysts, non-precious metal catalysts must meet three key criteria: have high catalytic activity, allow for high power density at meaningful cell voltages and have adequate operational stability/durability. Over the last three years our research group at INRS-EMT has made significant progress in achieving these criteria including a cathode catalyst with a power density of 0.75W cm(-2) at 0.6V under H-2/O-2, a meaningful voltage for PEMFC operation, comparable with that of a commercial Pt-based cathode tested under identical conditions.",,FE/N/C CATALYSTS; CATHODE CATALYST; CARBON-BLACKS; IRON,FE/N/C CATALYSTS;CATHODE CATALYST;CARBON-BLACKS;IRON,,"Zawodzinski, T; Mukerjee, S; Strasser, P","65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA",Symposium on Tutorials on Electrocatalysis in Low Temperature Fuel Cells held during the 221st Meeting of the Electrochemical-Society,"Seattle, WA","MAY 06-10, 2012",ELECTROCHEMICAL SOC INC,1938-5862,978-1-60768-312-4; 978-1-56677-954-8,,,English,ECS TRANSACTIONS,Proceedings Paper,WoS,Electrochemistry; Energy & Fuels,WOS:000316906200004,2-s2.0-84869002014,Canada,No email,Canet Electrocatalysis Inc;INRS,"Canet Electrocatalysis Inc, Canada;INRS, Canada","Lefevre, M.; Dodelet, J. P."
"Sarapuu, A., Lilloja, J., Akula, S., Zagal, J.H., Specchia, S., Tammeveski, K.",Recent Advances in Non-Precious Metal Single-Atom Electrocatalysts for Oxygen Reduction Reaction in Low-Temperature Polymer-Electrolyte Fuel Cells,2023,CHEMCATCHEM,15,22,,,,27,71,10.1002/cctc.202300849,,"[Sarapuu, Ave; Lilloja, Jaana; Akula, Srinu; Tammeveski, Kaido] Univ Tartu, Inst Chem, Ravila 14a, EE-50411 Tartu, Estonia; [Zagal, Jose H.] Univ Santiago Chile, Fac Quim & Biol, Dept Quim Mat, Lab Electrocatalisis & Elect Mol, Av Libertador Bernardo OHiggins 3363, Santiago 9170124, Chile; [Specchia, Stefania] Politecn Torino, Dept Appl Sci & Technol, Corso Duca Abruzzi 24, I-10129 Turin, Italy",,"Fuel cells have emerged as a promising clean electrochemical energy technology with a great potential in various sectors, including transportation and power generation. However, the high cost and scarcity of the noble metals currently used to synthesise electrocatalysts for low-temperature fuel cells has hindered their widespread commercialisation. In recent decades, the development of non-precious metal electrocatalysts for the cathodic oxygen reduction reaction (ORR) have gained significant attention. Among those, electrocatalysts with atomically dispersed active sites, referred to as single-atom catalysts (SACs), are gaining more interest. Nanocarbon materials containing single transition metal atoms coordinated to nitrogen atoms are active electrocatalysts for the ORR in both acidic and alkaline conditions and thus have a great promise to be utilised as non-precious metal cathode electrocatalysts in low-temperature fuel cells. This review article provides an overview of the recent advancements in the utilisation of transition metal-based SACs in proton exchange membrane fuel cells (PEMFCs) and anion exchange membrane fuel cells (AEMFCs). We highlight the main strategies and synthetic approaches for tailoring the properties of SACs to enhance their ORR activity and durability. Based on the already achieved results, it is evident that SACs indeed could be suitable for the cathode of the low-temperature fuel cells. Single-Atom Electrocatalysts for low-temperature fuel cells: This review summarises the recent advancements in the utilisation of transition metal-based single-atom catalysts in proton exchange membrane fuel cells (PEMFCs) and anion exchange membrane fuel cells (AEMFCs). The main strategies for tailoring the properties of the M-N-C electrocatalysts to enhance their performance and durability are highlighted.image",anion exchange membrane fuel cell; non-precious metal catalyst; oxygen reduction reaction; proton exchange membrane fuel cell; single-atom electrocatalyst,NITROGEN-CARBON CATALYSTS; FE-N/C ELECTROCATALYSTS; N-C ELECTROCATALYSTS; ACTIVE-SITES; TRANSITION-METAL; CATHODE CATALYSTS; POROUS CARBONS; X SITES; PERFORMANCE; IRON,anion exchange membrane fuel cell;non-precious metal catalyst;oxygen reduction reaction;proton exchange membrane fuel cell;single-atom electrocatalyst;NITROGEN-CARBON CATALYSTS;FE-N/C ELECTROCATALYSTS;N-C ELECTROCATALYSTS;ACTIVE-SITES;TRANSITION-METAL;CATHODE CATALYSTS;POROUS CARBONS;X SITES;PERFORMANCE;IRON,kaido.tammeveski@ut.ee,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1867-3880,,,,English,CHEMCATCHEM,Review,WoS,Chemistry,WOS:001091890600001,2-s2.0-85175378188,Estonia;Chile;Italy,ut.ee,Univ Tartu;Univ Santiago Chile;Politecn Torino,"Univ Tartu, Estonia;Univ Santiago Chile, Chile;Politecn Torino, Italy","Sarapuu, Ave; Lilloja, Jaana; Akula, Srinu; Zagal, Jose H.; Specchia, Stefania; Tammeveski, Kaido"
"Song, M.X., Song, Y.H., Sha, W.B., Xu, B.S., Guo, J.J., Wu, Y.C.",Recent Advances in Non-Precious Transition Metal/Nitrogen-doped Carbon for Oxygen Reduction Electrocatalysts in PEMFCs,2020,CATALYSTS,10,1,141,,,23,55,10.3390/catal10010141,,"[Song, Meixiu; Song, Yanhui; Sha, Wenbo; Xu, Bingshe; Guo, Junjie; Wu, Yucheng] Taiyuan Univ Technol, Key Lab Interface Sci & Engn Adv Mat, Minist Educ, Taiyuan 030024, Shanxi, Peoples R China; [Xu, Bingshe] Shaanxi Univ Sci & Technol, Mat Inst Atom & Mol Sci, Xian 710021, Shaanxi, Peoples R China",,"The proton exchange membrane fuel cells (PEMFCs) have been considered as promising future energy conversion devices, and have attracted immense scientific attention due to their high efficiency and environmental friendliness. Nevertheless, the practical application of PEMFCs has been seriously restricted by high cost, low earth abundance and the poor poisoning tolerance of the precious Pt-based oxygen reduction reaction (ORR) catalysts. Noble-metal-free transition metal/nitrogen-doped carbon (M-NxC) catalysts have been proven as one of the most promising substitutes for precious metal catalysts, due to their low costs and high catalytic performance. In this review, we summarize the development of M-NxC catalysts, including the previous non-pyrolyzed and pyrolyzed transition metal macrocyclic compounds, and recent developed M-NxC catalysts, among which the Fe-NxC and Co-NxC catalysts have gained our special attention. The possible catalytic active sites of M-NxC catalysts towards the ORR are also analyzed here. This review aims to provide some guidelines towards the design and structural regulation of non-precious M-NxC catalysts via identifying real active sites, and thus, enhancing their ORR electrocatalytic performance.",proton exchange membrane fuel cells; oxygen reduction reaction; non-precious metal catalysts; transition metal; nitrogen-doped carbon,HEAT-TREATED POLYACRYLONITRILE; PRECIOUS-METAL CATALYSTS; ACTIVE-SITES; POROUS CARBON; ELECTROCHEMICAL REDUCTION; EFFICIENT CATALYSTS; CATHODIC REDUCTION; MESOPOROUS CARBON; ORGANIC FRAMEWORK; O-2 REDUCTION,proton exchange membrane fuel cells;oxygen reduction reaction;non-precious metal catalysts;transition metal;nitrogen-doped carbon;HEAT-TREATED POLYACRYLONITRILE;PRECIOUS-METAL CATALYSTS;ACTIVE-SITES;POROUS CARBON;ELECTROCHEMICAL REDUCTION;EFFICIENT CATALYSTS;CATHODIC REDUCTION;MESOPOROUS CARBON;ORGANIC FRAMEWORK;O-2 REDUCTION,songmeixiu0159@link.tyut.edu.cn; songyanhui0137@link.tyut.edu.cn; shawenbo0169@link.tyut.edu.cn; xubs@tyut.edu.cn; guojunjie@tyut.edu.cn; wyc@tyut.edu.cn,,"ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND",,,,MDPI,,,,,English,CATALYSTS,Review,WoS,Chemistry,WOS:000516825000140,2-s2.0-85078750699,China,link.tyut.edu.cn,Taiyuan Univ Technol;Shaanxi Univ Sci & Technol,"Taiyuan Univ Technol, China;Shaanxi Univ Sci & Technol, China","Song, Meixiu; Song, Yanhui; Sha, Wenbo; Xu, Bingshe; Guo, Junjie; Wu, Yucheng"
"Wang, Y.Q., Hao, J.Y., Liu, Y., Liu, M., Sheng, K., Wang, Y., Yang, J., Li, J., Li, W.Z.",Recent advances in regulating the performance of acid oxygen reduction reaction on carbon-supported non-precious metal single atom catalysts,2023,JOURNAL OF ENERGY CHEMISTRY,76,,,601,616,16,70,10.1016/j.jechem.2022.09.047,,"[Wang, Yanqiu; Hao, Jiayu; Liu, Yang; Sheng, Kuang; Wang, Yue; Yang, Jun; Li, Jie; Li, Wenzhang] Cent South Univ, Sch Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China; [Liu, Min] Cent South Univ, Sch Phys & Elect, Changsha 410083, Hunan, Peoples R China",,"Developing high performance and low-cost catalysts for oxygen reduction reaction (ORR) in challenging acid condition is vital for proton-exchange-membrane fuel cells (PEMFCs). Carbon-supported non -precious metal single atom catalysts (SACs) have been identified as potential catalysts in the field. Great advance has been obtained in constructing diverse active sites of SACs for improving the perfor-mance and understanding the fundamental principles of regulating acid ORR performance. However, the ORR performance of SACs is still unsatisfactory. Importantly, microenvironment adjustment of SACs offers chance to promote the performance of acid ORR. In this review, acid ORR mechanism, atten-uation mechanism and performance improvement strategies of SACs are presented. The strategies for promoting ORR activity of SACs include the adjustment of center metal and its microenvironment. The relationship of ORR performance and structure is discussed with the help of advanced experimental investigations and theoretical calculations, which will offer helpful direction for designing advanced SACs for ORR.(c) 2022 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.",Oxygen reduction reaction; Single atom catalysts; Microenvironment of center metal; Regulation of center metal atoms; Electron structure; Proton-exchange-membrane fuel cells,FE-N-C; ACTIVE-SITES; EFFICIENT OXYGEN; RATIONAL DESIGN; IRON; IDENTIFICATION; ELECTROCATALYSTS; MECHANISMS; DESCRIPTOR; NANOTUBES,Oxygen reduction reaction;Single atom catalysts;Microenvironment of center metal;Regulation of center metal atoms;Electron structure;Proton-exchange-membrane fuel cells;FE-N-C;ACTIVE-SITES;EFFICIENT OXYGEN;RATIONAL DESIGN;IRON;IDENTIFICATION;ELECTROCATALYSTS;MECHANISMS;DESCRIPTOR;NANOTUBES,lijieliu@csu.edu.cn; liwenzhang@csu.edu.cn,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2095-4956,,,,English,J ENERGY CHEM,Review,WoS,Chemistry; Energy & Fuels; Engineering,WOS:000892138100001,2-s2.0-85140920185,China,csu.edu.cn,Cent South Univ,"Cent South Univ, China","Wang, Yanqiu; Hao, Jiayu; Liu, Yang; Liu, Min; Sheng, Kuang; Wang, Yue; Yang, Jun; Li, Jie; Li, Wenzhang"
"Yoon, H.S., Jung, W.S., Choe, M.H.",Recent advances in Studies of the Activity of Non-precious Metal Catalysts for the Oxygen Reduction Reaction in Polymer Electrolyte Membrane Fuel Cells,2020,JOURNAL OF THE KOREAN ELECTROCHEMICAL SOCIETY,23,4,,90,96,7,3,10.5229/JKES.2020.23.4.90,,"[Yoon, Ho-Seok; Jung, Won Suk; Choe, Myeong-Ho] Hankyong Natl Univ, Fac Food Biotechnol & Chem Engn, Anseong 17579, South Korea",,"Polymer electrolyte membrane fuel cells, which convert the chemical reaction energy of hydrogen into electric power directly, are a type of eco-friendly power for future vehicles. Due to the sluggish oxygen reduction reaction and costly Pt catalyst in the cathode, the research related to the replacement of Pt-based catalysts has been vitally carried out. In this case, however, the performance is significantly different from each other and a variety of factors have existed. In this review paper, we rearrange and summarize relevant papers published within 5 years approximately. The selection of precursors, synthesis method, and co-catalyst are represented as a core factor, while the necessity of research for the further enhancement of activity may be raised. It can be anticipated to contribute to the replacement of precious metal catalysts in the various fields of study. The final objective of the future research is depicted in detail.",Polymer Electrolyte Membrane Fuel Cells; Oxygen Reduction Reaction; Non-Precious Metal Catalysts; Activity,N-C CATALYSTS; HIGH-PERFORMANCE; FE; ELECTROCATALYST; FE/N/C; DURABILITY; SPHERES,Polymer Electrolyte Membrane Fuel Cells;Oxygen Reduction Reaction;Non-Precious Metal Catalysts;Activity;N-C CATALYSTS;HIGH-PERFORMANCE;FE;ELECTROCATALYST;FE/N/C;DURABILITY;SPHERES,jungw@hknu.ac.kr,,"RM 1715, 122 WANGSAN-RO, DONGDAEMUN-GU, SEOUL, 130-070, SOUTH KOREA",,,,KOREAN ELECTROCHEMICAL SOC,1229-1935,,,,Korean,J KOREAN ELECTROCHEM,Review,WoS,Electrochemistry,WOS:000607054000003,,South Korea,hknu.ac.kr,Hankyong Natl Univ,"Hankyong Natl Univ, South Korea","Yoon, Ho-Seok; Jung, Won Suk; Choe, Myeong-Ho"
"Jing, P., Gong, X., Liu, B.C., Zhang, J.",Recent advances in synergistic effect promoted catalysts for preferential oxidation of carbon monoxide,2020,CATALYSIS SCIENCE & TECHNOLOGY,10,4,,919,934,16,70,10.1039/c9cy02073j,,"[Jing, Peng; Liu, Baocang; Zhang, Jun] Inner Mongolia Univ, Sch Chem & Chem Engn, 235 West Univ St, Hohhot 010021, Peoples R China; [Jing, Peng; Liu, Baocang; Zhang, Jun] Inner Mongolia Univ, Inner Mongolia Engn & Technol Res Ctr Catalyt Con, 235 West Univ St, Hohhot 010021, Peoples R China; [Gong, Xia] Inner Mongolia Agr Univ, Sch Sci, Hohhot 010018, Peoples R China",,"Preferential oxidation of CO (PROX) in a H-2-rich stream is considered as a promising strategy for abatement of trace amounts of CO to prevent poisoning of Pt anodes by H-2 in polymer-electrolyte membrane fuel cells (PEMFCs). The design of efficient catalysts is highly desirable to promote PROX. In this review, the recent advances in noble metal-based and non-noble metal-based catalysts for PROX are reviewed including some representative single-atom catalysts with outstanding catalytic performance. We summarize their synthetic methods, catalytic performance for PROX and reaction mechanisms with special emphasis on the synergistic effects between different components of catalysts that contribute to enhanced catalytic performance. Finally, the remaining challenges in PROX and some related promising strategies are indicated.",,SELECTIVE CO OXIDATION; METAL-ORGANIC-FRAMEWORK; HYDROGEN-RICH STREAM; SUPPORTED GOLD CATALYSTS; BEAM IRRADIATION METHOD; EXPOSED FACE PRESENT; GAS SHIFT REACTION; CUO/CEO2 CATALYSTS; H-2-RICH STREAM; PROX REACTION,SELECTIVE CO OXIDATION;METAL-ORGANIC-FRAMEWORK;HYDROGEN-RICH STREAM;SUPPORTED GOLD CATALYSTS;BEAM IRRADIATION METHOD;EXPOSED FACE PRESENT;GAS SHIFT REACTION;CUO/CEO2 CATALYSTS;H-2-RICH STREAM;PROX REACTION,cebcliu@imu.edu.cn; cejzhang@imu.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2044-4753,,,,English,CATAL SCI TECHNOL,Review,WoS,Chemistry,WOS:000518579100001,2-s2.0-85080967615,China,imu.edu.cn,Inner Mongolia Univ;Inner Mongolia Agr Univ,"Inner Mongolia Univ, China;Inner Mongolia Agr Univ, China","Jing, Peng; Gong, Xia; Liu, Baocang; Zhang, Jun"
"Chen, S.G., Wei, Z.D.","Recent Advances of Electrocatalyst, Catalyst Utilization and Water Management in Polymer Electrolyte Membrane Fuel Cells",2015,SCIENCE OF ADVANCED MATERIALS,7,10,,2053,2068,16,5,10.1166/sam.2015.2262,,"[Chen, Siguo; Wei, Zidong] Chongqing Univ, Sch Chem & Chem Engn, Chongqing Key Lab Chem Proc Clean Energy & Resour, Chongqing 400044, Peoples R China",,"At present, despite the great advances in polymer electrolyte membrane fuel cells (PEMFCs) technology over the past two decades through intensive research and development activities, their large-scale commercialization is still hampered by their higher materials cost and lower reliability and durability. Up to now, platinum (Pt) based catalysts are still the best cathode materials for the oxygen reduction reaction (ORR) and are widely used in PEMFCs. Main challenges to be addressed in this area are the high electrochemical activity and high stability maintenance for low-Pt-loading catalysts toward the feasibility for fuel cells operation and the reduction of the system cost. Besides Pt-based catalysts, alternative non-Pt catalysts have the potential to efficiently catalyze the ORR and reduce the cost of PEMFCs. Proper water management is of vital importance to achieve maximum performance and durability from PEMFCs. This paper provides a review of recent advances related to the Pt-based catalyst, non-Pt metal catalyst, catalyst utilization and water management in PEMFCs.",Oxygen Reduction Reaction; Electrocatalysis; Pt-Based Catalyst; Non-Precious Metal Catalyst; Water Management,OXYGEN REDUCTION REACTION; CORE-SHELL NANOPARTICLES; POROUS CARBON ELECTRODE; GAS-DIFFUSION MEDIA; METHANOL ELECTROOXIDATION; PULSE ELECTRODEPOSITION; LOADING ELECTRODES; MICROPOROUS LAYER; ACID ELECTROLYTE; CATHODE CATALYST,Oxygen Reduction Reaction;Electrocatalysis;Pt-Based Catalyst;Non-Precious Metal Catalyst;Water Management;CORE-SHELL NANOPARTICLES;POROUS CARBON ELECTRODE;GAS-DIFFUSION MEDIA;METHANOL ELECTROOXIDATION;PULSE ELECTRODEPOSITION;LOADING ELECTRODES;MICROPOROUS LAYER;ACID ELECTROLYTE;CATHODE CATALYST,zdwei@cqu.edu.cn,,"26650 THE OLD RD, STE 208, VALENCIA, CA 91381-0751 USA",,,,AMER SCIENTIFIC PUBLISHERS,1947-2935,,,,English,SCI ADV MATER,Review,WoS,Science & Technology - Other Topics; Materials Science; Physics,WOS:000364108500011,2-s2.0-85000399434,China,cqu.edu.cn,Chongqing Univ,"Chongqing Univ, China","Chen, Siguo; Wei, Zidong"
"Liu, Q., Shui, J.",Recent advances of Fe single atom catalysts towards high-performance proton exchange membrane fuel cells,2024,Nano Materials Science,,,,,,,2,10.1016/j.nanoms.2024.04.009,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85192108722&doi=10.1016%2Fj.nanoms.2024.04.009&partnerID=40&md5=ac0809f7f6718b34937ccb7f757b1ed9,"Beihang University, Beijing, China; Beihang University, Beijing, China; Tianmushan Laboratory, Hangzhou, China","Liu, Qingtao, Beihang University, Beijing, China, Beihang University, Beijing, China; Shui, Jianglan, Beihang University, Beijing, China, Tianmushan Laboratory, Hangzhou, China","The Fe–N–C catalysts with atomic Fe<inf>1</inf> active sites are the most active low-cost alternatives to Pt/C for the large-scale application of proton exchange membrane fuel cells (PEMFCs). However, the activity performance of Fe–N–C catalysts still lags behind that of Pt catalysts, especially in PEMFC devices. This review focuses on the three key factors affecting the activity of Fe–N–C catalysts and the advanced synthesis strategies for high-performance Fe–N–C. Based on the literature data, we have summarized the relationship between catalyst iron content and effective site concentration, pointed out the current difficulties encountered in catalyst design, and proposed several aspects that future research needs to focus on. We believe this review could guide the rational design of Fe–N–C type of single-atom catalysts and promote the development of low-cost PEMFCs. © 2024 Chongqing University",Fe-N-C; Oxygen reduction reaction; Proton exchange membrane fuel cells; Single atom catalysts; Turnover frequency; Utilization,Atoms; Catalyst activity; Costs; Electrolytic reduction; Iron; Iron compounds; Proton exchange membrane fuel cells (PEMFC); Fe-N-C; Low-costs; Oxygen reduction reaction; Performance; Proton-exchange membranes fuel cells; Single atom catalyst; Single-atoms; Turnover frequency; Utilization; ]+ catalyst; Oxygen,Fe-N-C;Oxygen reduction reaction;Proton exchange membrane fuel cells;Single atom catalysts;Turnover frequency;Utilization;Atoms;Catalyst activity;Costs;Electrolytic reduction;Iron;Iron compounds;Proton exchange membrane fuel cells (PEMFC);Low-costs;Performance;Proton-exchange membranes fuel cells;Single atom catalyst;Single-atoms;]+ catalyst;Oxygen,"J. Shui; School of Materials Science and Engineering, Beihang University, Beijing, 100191, China; email: shuijianglan@buaa.edu.cn",,,,,,KeAi Communications Co.,20966482,,,,English,Nano. Mater. Sci.,Review,Scopus,,2-s2.0-85192108722,,China,buaa.edu.cn,,,"Liu, Q.; Shui, J."
"Higgins, D.C., Chen, Z.",Recent development of non-precious metal catalysts,2013,Lecture Notes in Energy,9,,,247,269,,15,10.1007/978-1-4471-4911-8_9,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84883007696&doi=10.1007%2F978-1-4471-4911-8_9&partnerID=40&md5=51135725184150d88988a5219bb3841c,"Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo, ON, Canada","Higgins, Drew C., Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo, ON, Canada; Chen, Zhongwei, Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo, ON, Canada","The development of high-performance non-precious metal catalysts (NPMC) for use at the cathode of polymer electrolyte membrane fuel cells will provide immense economic advantages over the current platinum-based catalyst technologies, perpetuating the sustainable widespread commercialization of these devices. It is imperative to develop NPMC that can effectively combine excellent oxygen reduction activities, high catalyst utilization, and long-term operational durability. This chapter focuses on recent advances made in the past 3-4 years and research trends in this field, with a particular focus on pyrolyzed carbon-supported nitrogen-coordinated transition metal (Fe and/or Co) complexes which have high potential of replacing conventional platinum-based catalysts. © Springer-Verlag London 2013.",,Catalyst utilization; Economic advantages; High potential; Non-precious metal catalysts; Oxygen Reduction; Platinum based catalyst; Research trends; Coordination reactions; Electrocatalysis; Electrolytic reduction; Platinum; Precious metals; Proton exchange membrane fuel cells (PEMFC); Catalyst activity,Catalyst utilization;Economic advantages;High potential;Non-precious metal catalysts;Oxygen Reduction;Platinum based catalyst;Research trends;Coordination reactions;Electrocatalysis;Electrolytic reduction;Platinum;Precious metals;Proton exchange membrane fuel cells (PEMFC);Catalyst activity,"Z. Chen; Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo Institute for Sustainable Energy, University of Waterloo, Waterloo, ON, N2L 3G1, 200 University Ave. W, Canada; email: zhwchen@uwaterloo.ca","Shao, M.",,,,,,21951284,9783319008219; 9783642258862; 9781447146667; 9781447143840; 9783319269481; 9781447147268; 9781447149101; 9781447149675; 9781447147862; 9781447151395,,,English,Lecture Notes in Energy,Article,Scopus,,2-s2.0-84883007696,,Canada,uwaterloo.ca,,,"Higgins, D.C.; Chen, Z."
"Kim, J.G., Cho, Y., Pak, C.",Recent Developments of Metal-N-C Catalysts Toward Oxygen Reduction Reaction for Anion Exchange Membrane Fuel Cell: A Review,2024,Journal of Electrochemical Science and Technology,15,2,,207,219,,1,10.33961/jecst.2024.00052,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85192790032&doi=10.33961%2Fjecst.2024.00052&partnerID=40&md5=e3221b6804fc8a46e79cf5a06e20c653,"Graduate School of Energy Convergence, Gwangju Institute of Science and Technology, Gwangju, South Korea","Kim, Jonggyeong, Graduate School of Energy Convergence, Gwangju Institute of Science and Technology, Gwangju, South Korea; Cho, Youngin, Graduate School of Energy Convergence, Gwangju Institute of Science and Technology, Gwangju, South Korea; Pak, Chanho, Graduate School of Energy Convergence, Gwangju Institute of Science and Technology, Gwangju, South Korea","Metal-N-C (MNC) catalysts have been anticipated as promising candidates for oxygen reduction reaction (ORR) to achieve low-cost polymer electrolyte membrane fuel cells. The structure of the M-N<inf>x</inf> moiety enabled a high catalytic activity that was not observed in previously reported transition metal nanoparticle-based catalysts. Despite progress in non-precious metal catalysts, the low density of active sites of MNCs, which resulted in lower single-cell performance than Pt/C, needs to be resolved for practical application. This review focused on the recent studies and methodologies aimed to overcome these limitations and develop an inexpensive catalyst with excellent activity and durability in an alkaline environment. It included the possibility of non-precious metals as active materials for ORR catalysts, starting from Co phthalocyanine as ORR catalyst and the development of methodologies (e.g., metal-coordinated N-containing polymers, metal-organic frame-works) to form active sites, M-N<inf>x</inf> moieties. Thereafter, the motivation, procedures, and progress of the latest research on the design of catalyst morphology for improved mass transport ability and active site engineering that allowed the promoted ORR kinetics were discussed. © 2024, Korean Electrochemical Society. All rights reserved.",Active site engineering; Anionic exchange membrane fuel cell; Metal-N-C catalyst; Morphology control; Oxygen reduction reaction,,Active site engineering;Anionic exchange membrane fuel cell;Metal-N-C catalyst;Morphology control;Oxygen reduction reaction,,,,,,,Korean Electrochemical Society,20938551,,,,English,J. Electrochem. Sci. Technol.,Review,Scopus,,2-s2.0-85192790032,,South Korea,No email,,,"Kim, J.G.; Cho, Y.; Pak, C."
"Wang, W., Jia, Q.Y., Mukerjee, S., Chen, S.L.",Recent Insights into the Oxygen-Reduction Electrocatalysis of Fe/N/C Materials,2019,ACS CATALYSIS,9,11,,10126,10141,31,359,10.1021/acscatal.9b02583,,"[Wang, Wang; Chen, Shengli] Wuhan Univ, Dept Chem, Hubei Electrochem Power Sources Key Lab, Wuhan 430072, Hubei, Peoples R China; [Wang, Wang; Jia, Qingying; Mukerjee, Sanjeev] Northeastern Univ, Ctr Renewable Energy Technol, Dept Chem & Chem Biol, 317 Egan Res Ctr,360 Huntington Ave, Boston, MA 02115 USA",,"Owing to the high activity toward the oxygen reduction reaction (ORR) and the selectivity toward the four-electron pathway, single atom Fe/N/C electrocatalysts have been considered as the most promising low-cost candidates to replace Pt in fuel cells. Despite the significant progress achieved in the past decade, the performance and durability of Fe/N/C catalysts remain far behind that of the Pt-based materials in practical devices such as proton exchange membrane fuel cells (PEMFCs) in light-duty vehicles. Recent progress in Fe/N/C electrocatalysis has been mainly based on the empirical approach with rather random combinational synthesis conditions and precursors. For rational design of applicable Fe/N/C catalysts, an insightful understanding of fundamental electrocatalysis of Fe/N/C is required. In this critical review, we will focus on the mechanisms of the ORR catalysis of Fe/N/C, the categories of active sites in Fe/N/C catalysts including the electronic and structural properties of the catalytic centers, the assessment and quantification of the active sites, pH effect on the activity, and the degradation mechanisms. We hope the comprehensive and thorough discussions of Fe/N/C electrocatalysis will help to guide the design and development of high-performance Fe/N/C electrocatalysts toward the application of PEMFCs.",oxygen reduction reaction; Fe/N/C electrocatalysts; catalysis mechanism; active sites; pH effect; stability; fuel cell,NITROGEN-DOPED CARBON; FE-BASED CATALYSTS; PEM FUEL-CELLS; IRON-BASED CATALYSTS; N-C CATALYSTS; ACTIVE-SITES; O-2 REDUCTION; METAL ELECTROCATALYSTS; ELECTRO-REDUCTION; ENERGY-CONVERSION,oxygen reduction reaction;Fe/N/C electrocatalysts;catalysis mechanism;active sites;pH effect;stability;fuel cell;NITROGEN-DOPED CARBON;FE-BASED CATALYSTS;PEM FUEL-CELLS;IRON-BASED CATALYSTS;N-C CATALYSTS;ACTIVE-SITES;O-2 REDUCTION;METAL ELECTROCATALYSTS;ELECTRO-REDUCTION;ENERGY-CONVERSION,q.jia@northeastem.edu; s.mukerjee@northeastern.edu; slchen@whu.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2155-5435,,,,English,ACS CATAL,Article,WoS,Chemistry,WOS:000494549700039,2-s2.0-85073152204,China;United States,northeastem.edu,Wuhan Univ;Northeastern Univ,"Wuhan Univ, China;Northeastern Univ, United States","Wang, Wang; Jia, Qingying; Mukerjee, Sanjeev; Chen, Shengli"
"Mohideen, M.M., Radhamani, A.V., Ramakrishna, S., Wei, Y., Liu, Y.",Recent insights on iron based nanostructured electrocatalyst and current status of proton exchange membrane fuel cell for sustainable transport,2022,JOURNAL OF ENERGY CHEMISTRY,69,,,466,489,24,48,10.1016/j.jechem.2022.01.035,,"[Mohideen, Mohamedazeem M.; Liu, Yong] Beijing Univ Chem Technol, Coll Mat Sci & Engn, Beijing Key Lab Adv Funct Polymer Composites, Beijing 100029, Peoples R China; [Radhamani, Adiyodi Veettil] SRM Inst Sci & Technol, Dept Phys & Nanotechnol, Kattankulathur 603203, India; [Ramakrishna, Seeram] Natl Univ Singapore, Ctr Nanofibers & Nanotechnol, Singapore 1157, Singapore; [Wei, Yen] Tsinghua Univ, Dept Chem, Key Lab Bioorgan Phosphorus Chem & Chem Biol, Beijing 100084, Peoples R China",,"Bridging the performance gap of the electrocatalyst between the rotating disk electrode (RDE) and membrane electrode assembly (MEA) level testing is the key to reducing the total cost of proton exchange membrane fuel cell (PEMFC) vehicles. Presently, platinum metal accounts for similar to 42% of the total cost of the PEMFC vehicles for usage in the cathode catalyst layer, where the sluggish oxygen reduction reaction (ORR) occurs. An alternative to the platinum catalyst, the Fe-N-C catalyst has attracted considerable interest for PEMFC due to its cost-effectiveness and high catalytic activity towards ORR. However, the excellent ORR activity of Fe-N-C obtained from RDE studies rarely translates the same performance into MEA operating conditions. Such a performance gap is mainly attributed to the lack of atomic-level understanding of Fe-N-C active sites and their ORR mechanism. Besides, unless the cost of expensive electrocatalyst is reduced, the total operation cost of the PEMFC vehicles remains constant. Therefore, developing highly efficient Fe-N-C catalysts from academic and industrial perspectives is critical for commercializing PEMFC vehicles. Here, the scope of the review is three-fold. First, we discussed the atomiclevel insights of Fe-N-C active sites and ORR mechanism, followed by unraveling the different iron-based nanostructured ORR electrocatalysts, including oxide, carbide, nitride, phosphide, sulfide, and singleatom catalysts. And then we bridged their ORR catalytic performance gap between the RDE and MEA tests for real operating conditions of PEMFC vehicles. Second, we focused on bridging the cost barriers of PEMFC vehicles between capital, operation, and end-user. Finally, we provided the path to achieve sustainable development goals by commercializing PEMFC vehicles for a better world. (C) 2022 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.",Proton exchange membrane fuel cell (PEMFC); Active sites; Iron-based nanostructure; Sustainable development goals,OXYGEN REDUCTION REACTION; NITROGEN-DOPED GRAPHENE; N-C CATALYSTS; DISPERSED METAL-CATALYSTS; HIGHLY EFFICIENT; ACTIVE-SITES; TRANSITION-METAL; POROUS CARBON; CATHODE CATALYSTS; RECENT PROGRESS,Proton exchange membrane fuel cell (PEMFC);Active sites;Iron-based nanostructure;Sustainable development goals;OXYGEN REDUCTION REACTION;NITROGEN-DOPED GRAPHENE;N-C CATALYSTS;DISPERSED METAL-CATALYSTS;HIGHLY EFFICIENT;ACTIVE-SITES;TRANSITION-METAL;POROUS CARBON;CATHODE CATALYSTS;RECENT PROGRESS,weiyen@mail.tsinghua.edu.cn; yongliu@mail.buct.edu.cn,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2095-4956,,,,English,J ENERGY CHEM,Review,WoS,Chemistry; Energy & Fuels; Engineering,WOS:000813929300010,2-s2.0-85125565731,China;India;Singapore,mail.tsinghua.edu.cn,Beijing Univ Chem Technol;SRM Inst Sci & Technol;Natl Univ Singapore;Tsinghua Univ,"Beijing Univ Chem Technol, China;SRM Inst Sci & Technol, India;Natl Univ Singapore, Singapore;Tsinghua Univ, China","Mohideen, Mohamedazeem M.; Radhamani, Adiyodi Veettil; Ramakrishna, Seeram; Wei, Yen; Liu, Yong"
"Higgins, D.C., Chen, Z.W.",RECENT PROGRESS IN NON-PRECIOUS METAL CATALYSTS FOR PEM FUEL CELL APPLICATIONS,2013,CANADIAN JOURNAL OF CHEMICAL ENGINEERING,91,12,,1881,1895,15,85,10.1002/cjce.21884,,"[Higgins, Drew C.; Chen, Zhongwei] Univ Waterloo, Dept Chem Engn, Waterloo Inst Nanotechnol, Waterloo Inst Sustainable Energy, Waterloo, ON N2L 3G1, Canada",,"The development of non-precious metal catalysts (NPMCs) that are practical for use at the cathode of polymer electrolyte membrane fuel cells (PEMFCs) would provide immense economic advantages, perpetuating the looming widespread commercialisation of these devices. NPMC materials with excellent activity towards the oxygen reduction, coupled with PEMFC performance approaching that of state-of-the-art platinum catalysts brings this technology one step closer to practical application. Currently, the stability of these materials is still limited, and developing NPMC with excellent activity, performance and operational stability is the holy grail of PEMFC catalyst research. Fundamental knowledge available, along with recent progress made in this field of research will be the subject of this review paper.",fuel cell; energy conversion; electrocatalyst; oxygen reduction reaction; sustainable energy,OXYGEN REDUCTION REACTION; FE-BASED CATALYSTS; NITROGEN-DOPED GRAPHENE; HIGH-AREA CARBON; HIGH ELECTROCATALYTIC ACTIVITY; ASSISTED SYNTHESIS ROUTE; HEAT-TREATMENT AFFECT; FE/N/C-CATALYSTS; O-2 REDUCTION; ACTIVE-SITES,fuel cell;energy conversion;electrocatalyst;oxygen reduction reaction;sustainable energy;FE-BASED CATALYSTS;NITROGEN-DOPED GRAPHENE;HIGH-AREA CARBON;HIGH ELECTROCATALYTIC ACTIVITY;ASSISTED SYNTHESIS ROUTE;HEAT-TREATMENT AFFECT;FE/N/C-CATALYSTS;O-2 REDUCTION;ACTIVE-SITES,zhwchen@uwaterloo.ca,,"111 RIVER ST, HOBOKEN 07030-5774, NJ USA",,,,WILEY,0008-4034,,,,English,CAN J CHEM ENG,Article,WoS,Engineering,WOS:000326370200001,2-s2.0-84887024149,Canada,uwaterloo.ca,Univ Waterloo,"Univ Waterloo, Canada","Higgins, Drew C.; Chen, Zhongwei"
"Ding, L., Tang, T., Hu, J.S.",Recent Progress in Proton-Exchange Membrane Fuel Cells Based on Metal-Nitrogen-Carbon Catalysts,2021,ACTA PHYSICO-CHIMICA SINICA,37,9,2010048,,,21,29,10.3866/PKU.WHXB202010048,,"[Ding, Liang; Tang, Tang; Hu, Jin-Song] Chinese Acad Sci, Inst Chem, CAS Key Lab Mol Nanostruct & Nanotechnol, Beijing Natl Lab Mol Sci BNLMS, Beijing 100190, Peoples R China; [Ding, Liang; Tang, Tang; Hu, Jin-Song] Univ Chinese Acad Sci, Beijing 100049, Peoples R China",,"Proton-exchange membrane fuel cells (PEMFCs) directly transform chemical energy into electrical energy with high energy density and zero carbon emissions, thereby offering a clean energy alternative for fossil fuels and vehicle electrification. However, the existing PEMFCs rely on Pt-based catalysts, especially at the cathode side wherein the sluggish oxygen reduction reaction (ORR) takes place, resulting in high cost and limiting their commercial applications. Therefore, there is a strong interest in developing platinum group metal-free (PGM-free) PEMFCs. Although impressive advancements have been made since metal-nitrogen-carbon (M-N-C) catalysts have been developed as promising candidates for low-cost cathode catalysts, PGM-free PEMFCs still suffer from insufficient activity and durability. Owing to the intricate structure of the tri-phase interface and mass transport limitation, the M-N-C catalysts with high ORR activity in rotating disk electrode (RDE) tests still suffer from unexpected problems such as showing low activity and undesired rapid degradation process in real fuel cell conditions. Therefore, a comprehensive understanding of the active sites and influences of the M-N-C catalyst structure and cathode structure on the PEMFC performance will promote the development of PGM-free PEMFCs. Herein, with an aim to increase the activity and durability of PEMFCs based on M-N-C catalysts, we summarize the recent progress in understanding the active sites of M-N-C catalysts and the relationships between the structures of catalysts/catalyst layers and device performances. At the catalyst level, multiple delicately designed synthetic strategies suggest that attractive device performances can be obtained by tailoring the intrinsic activity and density of the catalyst active sites while engineering the porosity of catalysts to improve the utilization of active sites. Additionally, integrating the catalyst ink into the cathode catalyst layers in PGM-free PEMFC is pivotal for transforming the impressive ORR performance of catalysts in the RDE test to fuel cell performance. Accordingly, the recent advances in the enhancement of mass transfer and charge transport to achieve remarkable fuel cell performance were also included by rationally designing ionomer contents, catalyst morphology, and fabrication process of cathodic catalyst layers. Moreover, durability is the Achilles heel of PEMFCs with M-N-C catalysts, which is currently far behind the commercial requirements. The possible degradation mechanisms and the recent progress in seeking the corresponding solutions are also discussed in this review, including the decomposition of metal species, protonation of nitrogen sites, corrosion of carbon support, and micropore flooding. Based on these insights, the perspective is proposed by articulating open challenges and opportunities in materials innovations and device engineering with an aim to achieve practical M-N-C based PEMFCs.",Proton-exchange membrane fuel cell; Platinum group metal-free catalyst; Metal-nitrogen-carbon; Oxygen reduction reaction; Electrolysis,OXYGEN REDUCTION REACTION; N-C CATALYSTS; IRON-BASED CATALYSTS; FE/N/C-CATALYSTS; ACTIVE-SITES; ORGANIC-FRAMEWORK; LAYER STRUCTURE; PERFORMANCE; ELECTROCATALYST; STABILITY,Proton-exchange membrane fuel cell;Platinum group metal-free catalyst;Metal-nitrogen-carbon;Oxygen reduction reaction;Electrolysis;N-C CATALYSTS;IRON-BASED CATALYSTS;FE/N/C-CATALYSTS;ACTIVE-SITES;ORGANIC-FRAMEWORK;LAYER STRUCTURE;PERFORMANCE;ELECTROCATALYST;STABILITY,hujs@iccas.ac.cn,,"PEKING UNIV, CHEMISTRY BUILDING, BEIJING 100871, PEOPLES R CHINA",,,,PEKING UNIV PRESS,1000-6818,,,,English,ACTA PHYS-CHIM SIN,Review,WoS,Chemistry,WOS:000614110200003,2-s2.0-85103083902;2-s2.0-85176754946,China,iccas.ac.cn,Chinese Acad Sci;Univ Chinese Acad Sci,"Chinese Acad Sci, China;Univ Chinese Acad Sci, China","Ding, Liang; Tang, Tang; Hu, Jin-Song"
"Dombrovskis, J.K., Palmqvist, A.E.C.","Recent Progress in Synthesis, Characterization and Evaluation of Non-Precious Metal Catalysts for the Oxygen Reduction Reaction",2016,FUEL CELLS,16,1,,4,22,19,122,10.1002/fuce.201500123,,"[Dombrovskis, J. K.; Palmqvist, A. E. C.] Chalmers Univ Technol, Dept Chem & Chem Engn, Appl Chem, SE-41296 Gothenburg, Sweden",,"The oxygen reduction reaction (ORR) is usually catalyzed by precious metals. As the kinetics of the reaction are sluggish comparatively large amounts of precious metal are needed to achieve satisfactory reaction rates. This results in high cost of technologies utilizing the ORR, like low temperature fuel cells. Recent years have seen tremendous research efforts in the development of non-precious metal catalysts (NPMCs) with a wide range of newly developed materials resulting in improved catalyst materials, an increased understanding of the ORR mechanism on NPMC materials and better knowledge of the active site structure. Here we summarize the developments from 2011 and onwards with a special focus on carbon-based NPMCs developed for use in acid environments. We include explicit comparisons of PEMFC measurement results in all referenced studies and detailed information on the physical characterization methods used in various publications.",Alkaline Fuel Cell; Catalyst; Cathode; Direct Methanol Fuel Cell; Non-Noble Metal Catalysts; Non-Precious Metal Catalysts; Oxygen Reduction Reaction; PEM Fuel Cell,NITROGEN-DOPED CARBON; FE-N-C; COBALT-POLYPYRROLE CATALYSTS; HIGH ELECTROCATALYTIC ACTIVITY; DENSITY-FUNCTIONAL THEORY; FUEL-CELL CATALYSTS; DUAL PLASMA PROCESS; ORDERED MESOPOROUS CARBONS; ALIGNED BCN NANOTUBES; CATHODE CATALYSTS,Alkaline Fuel Cell;Catalyst;Cathode;Direct Methanol Fuel Cell;Non-Noble Metal Catalysts;Non-Precious Metal Catalysts;Oxygen Reduction Reaction;PEM Fuel Cell;NITROGEN-DOPED CARBON;FE-N-C;COBALT-POLYPYRROLE CATALYSTS;HIGH ELECTROCATALYTIC ACTIVITY;DENSITY-FUNCTIONAL THEORY;FUEL-CELL CATALYSTS;DUAL PLASMA PROCESS;ORDERED MESOPOROUS CARBONS;ALIGNED BCN NANOTUBES;CATHODE CATALYSTS,anders.palmqvist@chalmers.se,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1615-6846,,,,English,FUEL CELLS,Review,WoS,Electrochemistry; Energy & Fuels,WOS:000370741400002,2-s2.0-84961286102,Sweden,chalmers.se,Chalmers Univ Technol,"Chalmers Univ Technol, Sweden","Dombrovskis, J. K.; Palmqvist, A. E. C."
"Weiss, J., Zhang, H., Zelenay, P.",Recent progress in the durability of Fe-N-C oxygen reduction electrocatalysts for polymer electrolyte fuel cells,2020,Journal of Electroanalytical Chemistry,875,,114696,,,,55,10.1016/j.jelechem.2020.114696,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091494325&doi=10.1016%2Fj.jelechem.2020.114696&partnerID=40&md5=c6c82e129d9329fa1e351e1a3c6ca97a,"Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States","Weiss, John C., Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Zhang, Hanguang, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Zelenay, Piotr S., Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States","This mini-review article review focuses on the very recent advancements in the stability and durability under operating fuel cell conditions of Fe-N-C electrocatalysts oxygen reduction reaction (ORR) catalysts. The most prominent degradation mechanisms of active site demetallation and carbon corrosion, both resulting in a relatively rapid initial performance loss, are introduced and elaborated on through recent published work, with emphasis on the role of H<inf>2</inf>O<inf>2</inf> radicals in these two likely catalysts degradation mechanisms. The current state of Fe-N-C electrocatalysts is also discussed and several specific improvements are proposed as necessary to advance these materials towards a state of competitive stability and durability. © 2020 Elsevier B.V.",Durability; Electrocatalysis; Fe-N=C catalysts; Fuel cells; ORR; Oxygen reduction reaction; PGM-free catalysts; Platinum group metalfree catalysts; Stability,Catalyst activity; Corrosion; Degradation; Durability; Electrocatalysts; Electrolysis; Electrolytic reduction; Iron compounds; Oxygen; Oxygen reduction reaction; Proton exchange membrane fuel cells (PEMFC); Active site; Carbon corrosion; Degradation mechanism; Demetallation; Oxygen Reduction; Performance loss; Polymer electrolyte fuel cells; Recent progress; Polyelectrolytes,Durability;Electrocatalysis;Fe-N=C catalysts;Fuel cells;ORR;Oxygen reduction reaction;PGM-free catalysts;Platinum group metalfree catalysts;Stability;Catalyst activity;Corrosion;Degradation;Electrocatalysts;Electrolysis;Electrolytic reduction;Iron compounds;Oxygen;Proton exchange membrane fuel cells (PEMFC);Active site;Carbon corrosion;Degradation mechanism;Demetallation;Oxygen Reduction;Performance loss;Polymer electrolyte fuel cells;Recent progress;Polyelectrolytes,"P. Zelenay; Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, 87545, United States; email: zelenay@lanl.gov",,,,,,Elsevier B.V.,15726657,,JECHE,,English,J Electroanal Chem,Article,Scopus,,2-s2.0-85091494325,,United States,lanl.gov,,,"Weiss, J.; Zhang, H.; Zelenay, P."
"Xue, D.P., Zhang, J.N.",Recent progress of antipoisoning catalytic materials for high temperature proton exchange membrane fuel cells doped with phosphoric acid,2024,INDUSTRIAL CHEMISTRY & MATERIALS,2,2,,173,190,18,25,10.1039/d3im00101f,,"[Xue, Dongping; Zhang, Jia-Nan] Zhengzhou Univ, Coll Mat Sci & Engn, Zhengzhou 450001, Peoples R China",,"High-temperature proton exchange membrane fuel cells (HT-PEMFCs) have the unique advantages of fast electrode reaction kinetics, high CO tolerance, and simple water and thermal management at their operating temperature (120-300 degrees C), which can effectively solve the hydrogen source problem and help achieve the dual-carbon goal. The catalysts in HT-PEMFCs are mainly Pt-based catalysts, which have good catalytic activity in the oxygen reduction reaction (ORR) and hydrogen oxidation reaction (HOR). However, in HT-PEMFCs, the high load of platinum-based catalysts to alleviate the limitation of strong adsorption of phosphoric acid (PA) on the platinum surface on activity expression leads to high cost, insufficient activity, decreased activity under long-term operation and carrier corrosion. The present review mainly summarizes the latest research progress of HT-PEMFCs catalysts, systematically analyzes the application of precious metal and non-precious metal catalysts in HT-PEMFCs, and unveils the structure-activity relationship and anti-PA poisoning mechanism. The current challenges and opportunities faced by HT-PEMFCs are discussed, as well as possible future solutions. It is believed that this review can provide some inspiration for the future development of high-performance HT-PEMFC catalysts.Keywords: High-temperature proton exchange membrane fuel cells; Cathodic oxygen reduction; Anti-phosphoric acid poisonous; Pt group metal catalysts; Non-precious metal catalysts.",,OXYGEN REDUCTION REACTION; POLYBENZIMIDAZOLE MEMBRANE; ELECTRODE ASSEMBLIES; PLATINUM; ELECTROCATALYSTS; EFFICIENT; PERFORMANCE; PHOSPHATE; CARBON; SITES,OXYGEN REDUCTION REACTION;POLYBENZIMIDAZOLE MEMBRANE;ELECTRODE ASSEMBLIES;PLATINUM;ELECTROCATALYSTS;EFFICIENT;PERFORMANCE;PHOSPHATE;CARBON;SITES,zjn@zzu.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2755-2608,,,,English,IND CHEM MATER,Review,WoS,Engineering; Materials Science,WOS:001362845800001,,China,zzu.edu.cn,Zhengzhou Univ,"Zhengzhou Univ, China","Xue, Dongping; Zhang, Jia-Nan"
"Wang, J., Du, S.Q., Tao, L.",Recent Progress of Catalysts in the High Temperature Polymer Electrolyte Membrane Fuel Cells,2023,CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,44,5,20220722,,,16,1,10.7503/cjcu20220722,,"[Wang Jun; Tao Li] Hunan Univ Chongqing, Res Inst, Chongqing 401120, Peoples R China; [Wang Jun; Du Shiqian; Tao Li] Hunan Univ, Coll Chem & Chem Engn, Changsha 410000, Peoples R China",,"High temperature polymer electrolyte membrane fuel cells(HT-PEMFCs) are one form of energy conversion device which have many advantages compared with traditional low temperature PEMFCs. The catalysts in HT-PEMFCs are mainly Pt-based catalysts which have good catalytic activity to the oxygen reduction reaction (ORR) and hydrogen oxidation reaction (HOR). A high loading amount of Pt is used to alleviate the negative effect on activity expression caused by strong absorption of PA on the Pt surface. And Pt catalysts suffer from the issue of inadequate activity, activity loss during long term operation, high cost and support corrosion under harsh conditions. In this review, we summarize recent studies about catalysts in HT-PEMFCs and systematically analyze the further application of precious and non-precious metal catalysts. Furthermore,we give our perspectives about the problems that the catalysts in HT-PEMFCs currently have.",High temperature polymer electrolyte membrane fuel cell; Pt-based catalyst; Oxygen reduction reaction; Hydrogen oxidation reaction,HYDROGEN OXIDATION REACTION; OXYGEN REDUCTION REACTION; PHOSPHORIC-ACID; ELECTROCATALYSTS; PD; NANOPARTICLES; PLATINUM,High temperature polymer electrolyte membrane fuel cell;Pt-based catalyst;Oxygen reduction reaction;Hydrogen oxidation reaction;PHOSPHORIC-ACID;ELECTROCATALYSTS;PD;NANOPARTICLES;PLATINUM,dushiqiian@hnu.edu.cn; taoli@hnu.edu.cn,,"CHAOYANG DIST, 4, HUIXINDONGJIE, FUSHENG BLDG, BEIJING 100029, PEOPLES R CHINA",,,,HIGHER EDUCATION PRESS,0251-0790,,,,Chinese,CHEM J CHINESE U,Article,WoS,Chemistry,WOS:001115545500007,2-s2.0-85160018676,China,hnu.edu.cn,Hunan Univ Chongqing;Hunan Univ,"Hunan Univ Chongqing, China;Hunan Univ, China",Wang Jun; Du Shiqian; Tao Li
"Song, R., Wang, X., Ge, J.",Recent progress of noble metal-based single-atom electrocatalysts for acidic oxygen evolution reaction,2023,Current Opinion in Electrochemistry,42,,101379,,,,20,10.1016/j.coelec.2023.101379,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85171423659&doi=10.1016%2Fj.coelec.2023.101379&partnerID=40&md5=f85e12388df6845ae005d1f77ac1530a,"School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, China; Key Laboratory of Low-Carbon Conversion Science & Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China","Song, Ruochen, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, China; Wang, Xian, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, China; Ge, Junjie, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, China, Key Laboratory of Low-Carbon Conversion Science & Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China","Oxygen evolution reaction (OER) plays an important role in polymer electrolyte membrane water electrolysis (PEMWE) for hydrogen production, so the development of efficient and stable OER catalysts has attracted widespread attention in recent years. The noble metal-based OER catalysts are widely used in acidic media, but the expensive price and low yield of Ir have limited the large-scale applications, exploring high-activity, low-cost noble metal-based OER catalysts is critical. Noble metal-based single-atom catalysts (SACs) is a promising cost-effective alternative electrocatalysts for acidic OER with superior catalytic activity, but the structural instability and dissolution of noble metal-based SACs limits the practical implementation. In this review, we summarized the recent advances in noble metal-based SACs for acidic OER with some strategies for the improvement of catalytic activity and durability of catalysts. Finally, some issues and challenges of noble metal-based SACs are proposed. © 2023 Elsevier B.V.",Acidic oxygen evolution reaction; Noble metal; Single-atom catalyst,Atoms; Catalyst activity; Cost effectiveness; Electrocatalysts; Electrolysis; Hydrogen production; Oxygen; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Acidic media; Acidic oxygen evolution reaction; Large-scale applications; Low-yield; Polymer electrolyte membranes; Recent progress; Single-atom catalyst; Single-atoms; Water electrolysis; ]+ catalyst; Precious metals,Acidic oxygen evolution reaction;Noble metal;Single-atom catalyst;Atoms;Catalyst activity;Cost effectiveness;Electrocatalysts;Electrolysis;Hydrogen production;Oxygen;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Acidic media;Large-scale applications;Low-yield;Polymer electrolyte membranes;Recent progress;Single-atoms;Water electrolysis;]+ catalyst;Precious metals,"J. Ge; School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China; email: gejunjie@ustc.edu.cn; X. Wang; School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China; email: xwang18@mail.ustc.edu.cn",,,,,,Elsevier B.V.,24519103,,,,English,Curr. Opin. Electrochem.,Review,Scopus,,2-s2.0-85171423659,,China,ustc.edu.cn,,,"Song, R.; Wang, X.; Ge, J."
"Zhan, F., Hu, K.S., Mai, J.H., Zhang, L.S., Zhang, Z.G., He, H., Liu, X.H.",Recent progress of Pt-based oxygen reduction reaction catalysts for proton exchange membrane fuel cells,2024,RARE METALS,43,6,,2444,2468,25,28,10.1007/s12598-023-02586-5,,"[Zhan, Feng; Hu, Kun-Song; Mai, Jin-Hua; He, Huan] Guangxi Univ, Sch Resources Environm & Mat, Nanning 530004, Peoples R China; [Zhang, Li-Sheng; Liu, Xin-Hua] Beihang Univ, Sch Transportat Sci & Engn, Beijing 102206, Peoples R China; [Zhang, Zhen-Guo] IDTECH Suzhou Co Ltd, Suzhou 215217, Peoples R China; [Liu, Xin-Hua] Imperial Coll London, Dyson Sch Design Engn, London SW7 2AZ, England",,"With the increasing consumption of fossil fuels, proton exchange membrane fuel cells (PEMFCs) have attracted considerable attention as green and sustainable energy conversion devices. The slow kinetics of the cathodic oxygen reduction reaction (ORR) has a major impact on the performance of PEMFCs, and although platinum (Pt) can accelerate the reaction rate of the ORR, the scarcity and high cost of Pt resources still limit the development of PEMFCs. Therefore, the development of low-cost high-performance ORR catalysts is essential for the commercial application and development of PEMFCs. This paper reviews the research progress of researchers on Pt-based ORR catalysts in recent years, including Pt/C catalysts, Pt-based alloy catalysts, Pt-based intermetallic compounds, and Pt-based single-atom catalysts (SACs), with a focus on Pt-based alloy catalysts with different nanostructures. We described in detail the difficulties and solutions in the research process of various ORR catalysts and explained the principle of their activity enhancement with density functional theory (DFT). In addition, an outlook on the development of Pt-based catalysts is given, and reducing the amount of Pt used and improving the performance of catalysts are the directions to work on in the coming period. 速耗趋, offspring 换膜燃池(PEMFCs)绿换装.缓慢阴氧(ORR)PEMFCs, Pt 速ORR 速, Pt 稀昂贵仍限PEMFCs.,ORR 催剂PEMFCs.PtORR 催剂, Pt/C 催剂,Pt 催剂,Pt,Ptoffspring 催剂, Pt 催剂.ORR 催剂, 函 (DFT) 升., Pt 催剂, Pt,,,催剂.",Pt-based catalysts; PEMFCs; Pt-based intermetallic compounds; Single-atom catalysts,HYDROGEN EVOLUTION; CARBON NANOTUBES; PLATINUM ALLOY; PERFORMANCE; EFFICIENT; ELECTROCATALYSTS; GRAPHENE; ORR; NANOPARTICLES; NANOWIRES,Pt-based catalysts;PEMFCs;Pt-based intermetallic compounds;Single-atom catalysts;HYDROGEN EVOLUTION;CARBON NANOTUBES;PLATINUM ALLOY;PERFORMANCE;EFFICIENT;ELECTROCATALYSTS;GRAPHENE;ORR;NANOPARTICLES;NANOWIRES,zhenguo.zhang@idtechgroup.cn; noblehe@gxu.edu.cn; liuxinhua19@buaa.edu.cn,,"12B FUXIN RD, BEIJING 100814, PEOPLES R CHINA",,,,NONFERROUS METALS SOC CHINA,1001-0521,,,,English,RARE METALS,Review,WoS,Materials Science; Metallurgy & Metallurgical Engineering,WOS:001175228600002,2-s2.0-85186240006,China;United Kingdom,idtechgroup.cn,Guangxi Univ;Beihang Univ;IDTECH Suzhou Co Ltd;Imperial Coll London,"Guangxi Univ, China;Beihang Univ, China;IDTECH Suzhou Co Ltd, China;Imperial Coll London, United Kingdom","Zhan, Feng; Hu, Kun-Song; Mai, Jin-Hua; Zhang, Li-Sheng; Zhang, Zhen-Guo; He, Huan; Liu, Xin-Hua"
"Wu, H.R., Chen, M.Y., Li, W.D., Lu, B.A.",Recent Progress on Durable Metal-N-C Catalysts for Proton Exchange Membrane Fuel Cells,2024,CHEMISTRY-AN ASIAN JOURNAL,19,1,e202300862,,,15,9,10.1002/asia.202300862,,"[Wu, Hao-Ran; Chen, Miao-Ying; Li, Wei-Dong; Lu, Bang-An] Zhengzhou Univ, Coll Mat Sci & Engn, Zhengzhou 450001, Peoples R China",,"It is essential for the widespread application of proton exchange membrane fuel cells (PEMFCs) to investigate low-cost, extremely active, and long-lasting oxygen reduction catalysts. Initial performance of PGM-free metal-nitrogen-carbon (M-N-C) catalysts for oxygen reduction reaction (ORR) has advanced significantly, particularly for Fe-N-C-based catalysts. However, the insufficient stability of M-N-C catalysts still impedes their use in practical fuel cells. In this review, we focus on the understanding of the structure-stability relationship of M-N-C ORR catalysts and summarize valuable guidance for the rational design of durable M-N-C catalysts. In the first section of this review, we discuss the inherent degrading mechanisms of M-N-C catalysts, such as carbon corrosion, demetallation, H2O2 attack, etc. As we gain a thorough comprehension of these deterioration mechanisms, we shift our attention to the investigation of strategies that can mitigate catalyst deterioration and increase its stability. These strategies include enhancing the anti-oxidation of carbon, fortifying M-N bonds, and maximizing the effectiveness of free radical scavengers. This review offers a prospective view on the enhancement of the stability of non-noble metal catalysts. Metal-N-C electrocatalysts are considered to be promising low-cost candidates to replace Pt catalysts in fuel cells. Although their activity is comparable to commercial Pt/C, their stability is very poor. In this critical review, we first briefly introduce several common degradation mechanisms. By understanding these degradation mechanisms, our focus shifts to the investigation of strategies that mitigate catalyst deterioration and improve its stability. Finally, the development prospects of improving the stability of metal-N-C are prospected.image",Fuel cells; Oxygen reduction reaction; M-N-C Catalysts; Degradation mechanisms; Stability,OXYGEN REDUCTION REACTION; HIGH-PERFORMANCE ELECTROCATALYSTS; CARBON COMPOSITE CATALYSTS; NITROGEN-DOPED GRAPHENE; FE/N/C-CATALYSTS; ACTIVE-SITES; DEGRADATION; IRON; ORR; ELECTROLYTE,Fuel cells;Oxygen reduction reaction;M-N-C Catalysts;Degradation mechanisms;Stability;HIGH-PERFORMANCE ELECTROCATALYSTS;CARBON COMPOSITE CATALYSTS;NITROGEN-DOPED GRAPHENE;FE/N/C-CATALYSTS;ACTIVE-SITES;DEGRADATION;IRON;ORR;ELECTROLYTE,balu@zzu.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1861-4728,,,37966013,English,CHEM-ASIAN J,Review,WoS,Chemistry,WOS:001109296000001,2-s2.0-85178160737,China,zzu.edu.cn,Zhengzhou Univ,"Zhengzhou Univ, China","Wu, Hao-Ran; Chen, Miao-Ying; Li, Wei-Dong; Lu, Bang-An"
"Yuan, Y., Zheng, Y., Luo, D., Qiu, W., Wang, J., Wang, X., Chen, Z.","Recent progress on mechanisms, principles, and strategies for high-activity and high-stability non-PGM fuel cell catalyst design",2024,Carbon Energy,6,5,e426,,,,26,10.1002/cey2.426,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85182805126&doi=10.1002%2Fcey2.426&partnerID=40&md5=f247acbf9f8d04f4aa48f4cb374801d4,"GRINM (Guangdong) Institute for Advanced Materials and Technology, Foshan, Guangdong, China; Waterloo Institute for Nanotechnology, Waterloo, ON, Canada; School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou, Guangdong, China; General Research Institute for Non-ferrous Metals China, Beijing, China","Yuan, Yuping, GRINM (Guangdong) Institute for Advanced Materials and Technology, Foshan, Guangdong, China; Zheng, Yun, Waterloo Institute for Nanotechnology, Waterloo, ON, Canada; Luo, Dan, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou, Guangdong, China; Qiu, Weibin, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou, Guangdong, China; Wang, Jiantao, General Research Institute for Non-ferrous Metals China, Beijing, China; Wang, Xin, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou, Guangdong, China; Chen, Zhongwei, Waterloo Institute for Nanotechnology, Waterloo, ON, Canada","The commercialization of a polymer membrane H<inf>2</inf>–O<inf>2</inf> fuel cell and its widespread use call for the development of cost-effective oxygen reduction reaction (ORR) nonplatinum group metal (NPGM) catalysts. Nevertheless, to meet the requests for the real-world fuel cell application and replacing platinum catalysts, it still needs to address some challenges for NPGM catalysts regarding the sluggish ORR kinetics in the cathode and their poor durability in acidic environment. In response to these issues, numerous efforts have been made to study NPGM catalysts both theoretically and experimentally, developed these into the atomically dispersed coordinated metal–nitrogen–carbon (M–N–C) form over the past decades. In this review, we present a comprehensive summary of recent advancements on NPGM catalysts with high activity and durability. Catalyst design strategies in terms of optimizing active-site density and enhancing catalyst stability against demetalization and carbon corrosion are highlighted. It is also emphasized the importance of understanding the mechanisms and principles behind those strategies through a combination of theoretical modeling and experimental work. Especially, further understanding the mechanisms related to the active-site structure and the formation process of the single-atom active site under pyrolysis conditions is critical for active-site engineering. Optimizing the active-site distance is the basic principle for improving catalyst activity through increasing the catalyst active-site density. Theoretical studies for the catalyst deactivation mechanism and modeling stable active-site structures provide both mechanisms and principles to improve the NPGM catalyst durability. Finally, currently remained challenges and perspectives in the future on designing high-performance atomically dispersed NPGM catalysts toward fuel cell application are discussed. © 2024 The Authors. Carbon Energy published by Wenzhou University and John Wiley & Sons Australia, Ltd.",batteries; electrocatalysis; energy storage and conversion; fuel cells,Carbon; Catalyst activity; Catalyst deactivation; Corrosion; Cost effectiveness; Durability; Electric batteries; Electrolytic reduction; Fuel storage; Gas fuel purification; Proton exchange membrane fuel cells (PEMFC); Structural design; Active site; Active site density; Active site structure; Battery; Catalyst designs; Energy storage and conversions; Fuel cell application; High activity; Metal catalyst; Non-platinum; Electrocatalysis,batteries;electrocatalysis;energy storage and conversion;fuel cells;Carbon;Catalyst activity;Catalyst deactivation;Corrosion;Cost effectiveness;Durability;Electric batteries;Electrolytic reduction;Fuel storage;Gas fuel purification;Proton exchange membrane fuel cells (PEMFC);Structural design;Active site;Active site density;Active site structure;Battery;Catalyst designs;Energy storage and conversions;Fuel cell application;High activity;Metal catalyst;Non-platinum,"Z. Chen; Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo Institute for Sustainable Energy, University of Waterloo, Waterloo, Canada; email: zhwchen@uwaterloo.ca; X. Wang; Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangdong, China; email: wangxin@scnu.edu.cn",,,,,,John Wiley and Sons Inc,,,,,English,Carb. Energy.,Review,Scopus,,2-s2.0-85182805126,,China;Canada,uwaterloo.ca,,,"Yuan, Y.; Zheng, Y.; Luo, D.; Qiu, W.; Wang, J.; Wang, X.; Chen, Z."
"Liu, Y., Li, R., Xia, J., Shu, C., Liu, J., Yan, S., Jin, R., Chen, H., Teng, L., Si, Y., Guo, C., Zhang, Y., Xu, Q.",Recent progress on understanding of micro-and electronic-structures to synergistically enable the activity and stability for oxygen reduction,2025,Nano Research,18,3,94907244,,,,8,10.26599/NR.2025.94907244,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105000706108&doi=10.26599%2FNR.2025.94907244&partnerID=40&md5=cdbc414f7fe26ae876c7cae329bcad12,"School of Materials Science and Engineering, Chongqing University of Arts and Science, Chongqing, Yongchuan, China; Chongqing University, Chongqing, China; College of Materials Science and Engineering, Central South University, Changsha, Hunan, China; College of Arts, Humanities and Social Sciences, Edinburgh, Scotland, United Kingdom; College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, Sichuan, China; State Key Laboratory of Heavy Oil Processing, Beijing, China","Liu, Yao, School of Materials Science and Engineering, Chongqing University of Arts and Science, Chongqing, Yongchuan, China, Chongqing University, Chongqing, China; Li, Ruisi, College of Materials Science and Engineering, Central South University, Changsha, Hunan, China; Xia, Junjun, College of Arts, Humanities and Social Sciences, Edinburgh, Scotland, United Kingdom; Shu, Chenyang, School of Materials Science and Engineering, Chongqing University of Arts and Science, Chongqing, Yongchuan, China; Liu, Jianhong, School of Materials Science and Engineering, Chongqing University of Arts and Science, Chongqing, Yongchuan, China; Yan, Shaoxin, School of Materials Science and Engineering, Chongqing University of Arts and Science, Chongqing, Yongchuan, China; Jin, Rong, School of Materials Science and Engineering, Chongqing University of Arts and Science, Chongqing, Yongchuan, China; Chen, Haifeng, School of Materials Science and Engineering, Chongqing University of Arts and Science, Chongqing, Yongchuan, China; Teng, Liumei, School of Materials Science and Engineering, Chongqing University of Arts and Science, Chongqing, Yongchuan, China; Si, Yujun, College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, Sichuan, China; Guo, Chaozhong, School of Materials Science and Engineering, Chongqing University of Arts and Science, Chongqing, Yongchuan, China; Zhang, Yuxin, Chongqing University, Chongqing, China; Xu, Quan, State Key Laboratory of Heavy Oil Processing, Beijing, China","Single-atom catalysts (SACs) are considered as the most promising nonprecious metal alternatives for oxygen reduction reactions (ORR) in proton exchange membrane fuel cells because of their high atomic utilization and excellent catalytic performance. However, the inadequate activity and long-term stability of SACs under operational conditions significantly hinder their practical application. Therefore, this paper focuses on understanding the micro-and electronic structures that synergistically enable the activity and stability of oxygen reduction. It provides a comprehensive summary of the effects for improving the ORR catalytic activity and stability of SACs from a multilevel, multi-angle perspective, including macroscale adjustments to the overall catalyst structure, nanoscale optimization of the catalyst microstructure, and atomic-scale regulation of the active sites. Additionally, it emphasizes the importance of advanced simulation, computational methods, and characterization techniques in understanding the catalytic and degradation mechanisms of SACs during the ORR process. This review aims to provide a theoretical foundation for the synergistic catalytic mechanisms and long-term stable operation of catalytic sites in complex heterogeneous environments, thereby advancing research on low-cost, high-efficiency, and highly stable single-atom catalysts. © The Author(s) 2025.",oxygen reduction reactions (ORR); single-atom catalysts (SACs); structural regulation,Bioremediation; Degradation; Oxygen reduction reaction; Catalytic mechanisms; Electronic.structure; Micro-structures; Oxygen Reduction; Single-atom catalyst; Single-atoms; Structural regulation; ]+ catalyst; Electrolytic reduction,oxygen reduction reactions (ORR);single-atom catalysts (SACs);structural regulation;Bioremediation;Degradation;Oxygen reduction reaction;Catalytic mechanisms;Electronic.structure;Micro-structures;Oxygen Reduction;Single-atom catalyst;Single-atoms;]+ catalyst;Electrolytic reduction,"C. Guo; School of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing, 402160, China; email: guochaozhong1987@163.com; Y. Zhang; College of Material Science and Engineering, Chongqing University, Chongqing, 400044, China; email: zhangyuxin@cqu.edu.cn; Q. Xu; State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Beijing, 102249, China; email: xuquan@cup.edu.cn",,,,,,Tsinghua University Press,19980124,,,,English,Nano. Res.,Review,Scopus,,2-s2.0-105000706108,,China;United Kingdom,163.com,,,"Liu, Y.; Li, R.; Xia, J.; Shu, C.; Liu, J.; Yan, S.; Jin, R.; Chen, H.; Teng, L.; Si, Y.; Guo, C.; Zhang, Y.; Xu, Q."
"Wang, W.J., Ding, H., Wang, M.H., Cheng, H., Shi, X., Wang, L., Wang, C., Chu, W.S., Xie, Y., Wu, C.Z.",Reconstructed parallel sites enhance the reactive oxygen tolerance of non-noble metal catalyst for durable proton exchange membrane fuel cells,2024,SCIENCE CHINA-CHEMISTRY,67,11,,3739,3748,10,3,10.1007/s11426-024-2067-0,,"[Ding, Hui; Wang, Minghao; Cheng, Han; Shi, Xiang; Wang, Lin; Wang, Chun; Xie, Yi; Wu, Changzheng] Univ Sci & Technol China, CAS Ctr Excellence Nanosci, Sch Chem & Mat Sci, Hefei 230026, Peoples R China; [Wang, Wenjie; Chu, Wangsheng] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China; [Wu, Changzheng] Hefei Comprehens Natl Sci Ctr, Inst Energy, Hefei 230029, Peoples R China; [Chu, Wangsheng] Zhejiang Inst Photoelect, Jinhua 321004, Peoples R China",,"The establishment of reactive oxygen species (ROS) elimination sites in iron-nitrogen-carbon (Fe-N-C) electrocatalysts to achieve durable proton-exchange membrane fuel cells (PEMFCs) performance has attracted broad interest. However, realizing ROS removal efficiency and oxygen reduction reaction (ORR) activity within a single system represents a significant challenge to date. Herein, we demonstrate uniform ROS elimination sites and ORR centers through an electrochemical reconstruction method on the parallel sites of Fe@CeNC electrocatalyst for durable PEMFC. During the reconstruction process, the Fe sites can retain their original configuration. Meanwhile, the pristine Ce clusters will evolve into more efficient, highly dispersed sites. Furthermore, the reconstructed Fe and Ce sites exhibit favorable energy barriers for the ORR and ROS elimination pathways, respectively, thereby maintaining ORR activity and achieving high ROS tolerance. Consequently, the PEMFC assembled with our catalyst shows only a 2% decay in power density after the accelerated durability test. We anticipate that this parallel structure design will provide new insight into the development of more durable electrocatalysts for PEMFCs.",parallel reaction pathways; sites reconstruction; oxygen reduction reaction; radical elimination; fuel cells,REDUCTION; NANOPARTICLES; DURABILITY; DEGRADATION; ELECTRODE; DENSITY; DESIGN,parallel reaction pathways;sites reconstruction;oxygen reduction reaction;radical elimination;fuel cells;REDUCTION;NANOPARTICLES;DURABILITY;DEGRADATION;ELECTRODE;DENSITY;DESIGN,chuws@ustc.edu.cn; czwu@ustc.edu.cn,,"16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA",,,,SCIENCE PRESS,1674-7291,,,,English,SCI CHINA CHEM,Article,WoS,Chemistry,WOS:001309923400002,2-s2.0-85203445830,China,ustc.edu.cn,Univ Sci & Technol China;Hefei Comprehens Natl Sci Ctr;Zhejiang Inst Photoelect,"Univ Sci & Technol China, China;Hefei Comprehens Natl Sci Ctr, China;Zhejiang Inst Photoelect, China","Wang, Wenjie; Ding, Hui; Wang, Minghao; Cheng, Han; Shi, Xiang; Wang, Lin; Wang, Chun; Chu, Wangsheng; Xie, Yi; Wu, Changzheng"
"Liu, J., Bak, J., Roh, J., Lee, K.S., Cho, A., Han, J.W., Cho, E.",Reconstructing the Coordination Environment of Platinum Single-Atom Active Sites for Boosting Oxygen Reduction Reaction,2021,ACS CATALYSIS,11,1,,466,475,10,99,10.1021/acscatal.0c03330,,"[Liu, Jing; Bak, Junu; Roh, Jeonghan; Cho, EunAe] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Daejeon 34141, South Korea; [Lee, Kug-Seung] Pohang Univ Sci & Technol, Beamline Div, Pohang Accelerator Lab, Pohang 37673, Gyeongbuk, South Korea; [Cho, Ara; Han, Jeong Woo] Pohang Univ Sci & Technol, Dept Chem Engn, Pohang 37673, South Korea",,"Exploring highly efficient platinum single-atom (Pt-1) catalysts for oxygen reduction reaction (ORR) is desired to greatly reduce the catalysts costs of polymer electrolyte membrane (PEM) fuel cells. Herein, based on a nitrogen-doped active carbon (N-doped Black Pearl, NBP), an atomically dispersed Pt-based electrocatalyst is first prepared via a hydrothermal ethanol reduction method with Pt content of about 5 wt % (Pt-1/NBP), and it shows high selectivity for the two-electron oxygen reduction pathway. Through further high-temperature pyrolysis, the coordination environment of these isolated Pt atoms is reconstructed to form uniquely nitrogen-anchored platinum single-atom active sites (Pt-1@Pt/NBP) for a highly efficient four-electron oxygen reduction pathway. The obtained Pt-1@Pt/NBP catalyst presents excellent ORR performance and stability as well as fast ORR kinetics at a high potential region. As a cathode catalyst of a PEM fuel cell, Pt-1@Pt/NBP demonstrates 8.7 times higher mass activity than the commercial Pt/C at a cell voltage of 0.9 V.",platinum; single-atom catalyst; oxygen reduction reaction; active site; fuel cell,CATHODE CATALYSTS; CARBON MATERIALS; FUEL-CELLS; ELECTROCATALYSTS; ALLOY; NANOCRYSTALS,platinum;single-atom catalyst;oxygen reduction reaction;active site;fuel cell;CATHODE CATALYSTS;CARBON MATERIALS;FUEL-CELLS;ELECTROCATALYSTS;ALLOY;NANOCRYSTALS,eacho@kaist.ac.kr,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2155-5435,,,,English,ACS CATAL,Article,WoS,Chemistry,WOS:000606833100045,2-s2.0-85099044182,South Korea,kaist.ac.kr,Korea Adv Inst Sci & Technol;Pohang Univ Sci & Technol,"Korea Adv Inst Sci & Technol, South Korea;Pohang Univ Sci & Technol, South Korea","Liu, Jing; Bak, Junu; Roh, Jeonghan; Lee, Kug-Seung; Cho, Ara; Han, Jeong Woo; Cho, EunAe"
"Shin, D., Bhandari, S., Tesch, M.F., Bonke, S.A., Jaouen, F., Chabbra, S., Pratsch, C., Schnegg, A., Mechler, A.K.",Reduced formation of peroxide and radical species stabilises iron-based hybrid catalysts in polymer electrolyte membrane fuel cells,2022,JOURNAL OF ENERGY CHEMISTRY,65,,,433,438,6,25,10.1016/j.jechem.2021.05.047,,"[Shin, Dongyoon; Bhandari, Sabita; Tesch, Marc F.; Bonke, Shannon A.; Chabbra, Sonia; Schnegg, Alexander; Mechler, Anna K.] Max Planck Inst Chem Energy Convers, Stiftstr 34-36, D-45470 Mulheim, Germany; [Jaouen, Frederic] Univ Montpellier, ENSCM, CNRS, ICGM, Montpellier, France; [Pratsch, Christoph] Max Planck Gesell, Dept Inorgan Chem, Fritz Haber Inst, Faradayweg 4-6, D-14195 Berlin, Germany; [Shin, Dongyoon] Hyundai Motor Grp, R&D Div, Mabuk Ro 240beon Gil, Yongin 16891, South Korea; [Bhandari, Sabita; Mechler, Anna K.] Rhein Westfal TH Aachen, Electrochem React Engn, Forckenbeckstr 51, D-52074 Aachen, Germany",,"The incorporation of Pt into an iron-nitrogen-carbon (FeNC) catalyst for the oxygen reduction reaction (ORR) was recently shown to enhance catalyst stability without Pt directly contributing to the ORR activity. However, the mechanistic origin of this stabilisation remained obscure. It is established herein with rotating ring disc experiments that the side product, H2O2, which is known to damage FeNC catalysts, is suppressed by the presence of Pt. The formation of reactive oxygen species is additionally inhibited, independent of intrinsic H2O2 formation, as determined by electron paramagnetic resonance. Transmission electron microscopy identifies an oxidised Fe-rich layer covering the Pt particles, thus explaining the inactivity of the latter towards the ORR. These insights develop understanding of FeNC degradation mechanisms during ORR catalysis, and crucially establish the required properties of a precious metal free protective catalyst to improve FeNC stability in acidic media. (C) 2021 Published by ELSEVIER B.V. and Science Press on behalf of Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences.",Electrochemistry; Fuel cells; Oxygen reduction reaction; Non-precious metal catalyst; Hybrid catalyst; Stability,METAL-SUPPORT INTERACTIONS; OXYGEN REDUCTION REACTION; ELECTROCATALYSTS; NANOPARTICLES; ENCAPSULATION; FILMS,Electrochemistry;Fuel cells;Oxygen reduction reaction;Non-precious metal catalyst;Hybrid catalyst;Stability;METAL-SUPPORT INTERACTIONS;ELECTROCATALYSTS;NANOPARTICLES;ENCAPSULATION;FILMS,dyshin@hyundai.com; anna.mechler@avt.rwth-aachen.de,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2095-4956,,,,English,J ENERGY CHEM,Article,WoS,Chemistry; Energy & Fuels; Engineering,WOS:000701767100005,2-s2.0-85108293954,Germany;France;South Korea,hyundai.com,Max Planck Inst Chem Energy Convers;Univ Montpellier;Max Planck Gesell;Hyundai Motor Grp;Rhein Westfal TH Aachen,"Max Planck Inst Chem Energy Convers, Germany;Univ Montpellier, France;Max Planck Gesell, Germany;Hyundai Motor Grp, South Korea;Rhein Westfal TH Aachen, Germany","Shin, Dongyoon; Bhandari, Sabita; Tesch, Marc F.; Bonke, Shannon A.; Jaouen, Frederic; Chabbra, Sonia; Pratsch, Christoph; Schnegg, Alexander; Mechler, Anna K."
"Wang, M.J., Wang, L., Li, Q.B., Wang, D., Yang, L., Han, Y.J., Ren, Y., Tian, G., Zheng, X.Y., Ji, M.W., Zhu, C.Z., Peng, L.S., Waterhouse, G.I.N.",Regulating the Coordination Geometry and Oxidation State of Single-Atom Fe Sites for Enhanced Oxygen Reduction Electrocatalysis,2023,SMALL,19,24,,,,9,70,10.1002/smll.202300373,,"[Wang, Minjie; Wang, Li; Li, Qingbin; Yang, Liu; Han, Yongjun; Tian, Gang] Pingdingshan Univ, Sch Chem & Environm Engn, Pingdingshan 467000, Peoples R China; [Wang, Dan] Pingdingshan Univ, Sch Ceram, Pingdingshan 467000, Peoples R China; [Ren, Yuan] Fudan Univ, Dept Chem, Shanghai 200433, Peoples R China; [Zheng, Xiaoyang] Univ Tsukuba, Grad Sch Pure & Appl Sci, 1-1-1 Tennodai, Tsukuba 3058573, Japan; [Ji, Muwei] Shantou Univ, Coll Sci, Dept Chem, Shantou 515063, Peoples R China; [Zhu, Caizhen] Shenzhen Univ, Coll Chem & Environm Engn, Shenzhen 518060, Guangdong, Peoples R China; [Peng, Lishan] Chinese Acad Sci, Ganjiang Innovat Acad, Ganzhou 341100, Peoples R China; [Peng, Lishan; Waterhouse, Geoffrey I. N.] Univ Auckland, Sch Chem Sci, Auckland 1142, New Zealand",,"Fe-N-C catalysts demonstrate remarkable activity and stability for the oxygen reduction reaction (ORR) in polymer electrolyte membrane fuel cells and Zn-air batteries (ZABs). The local coordination of Fe single atoms in Fe-N-C catalysts strongly impacts ORR activity. Herein, Fe-N-C catalysts containing Fe single atoms sites with FeN3, FeN4, and FeN5 coordinations are synthesized by carbonization of Fe-rich polypyrrole precursors. The FeN5 sites possess a higher Fe oxidation state (+2.62) than the FeN3 (+2.23) and FeN4 (+2.47) sites, and higher ORR activity. Density functional theory calculations verify that the FeN5 coordination optimizes the adsorption and desorption of ORR intermediates, dramatically lowering the energy barrier for OH- desorption in the rate-limiting ORR step. A primary ZAB constructed using the Fe-N-C catalyst with FeN5 sites demonstrates state-of-the-art performance (an open circuit potential of 1.629 V, power density of 159 mW cm(-2)). Results confirm an intimate structure-activity relationship between Fe coordination, Fe oxidation state, and ORR activity in Fe-N-C catalysts.",Fe coordination geometry; Fe single atoms; FeNx sites; oxygen reduction reaction; zinc-air batteries,MASS-TRANSFER; CATALYSTS; HYDROGEN; CARBON,Fe coordination geometry;Fe single atoms;FeNx sites;oxygen reduction reaction;zinc-air batteries;MASS-TRANSFER;CATALYSTS;HYDROGEN;CARBON,3204@pdsu.edu.cn; czzhu@szu.edu.cn; lspeng@gia.cas.cn; g.waterhouse@auckland.ac.nz,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1613-6810,,,36919312,English,SMALL,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000950331100001,2-s2.0-85150723306,China;Japan;New Zealand,pdsu.edu.cn,Pingdingshan Univ;Fudan Univ;Univ Tsukuba;Shantou Univ;Shenzhen Univ;Chinese Acad Sci;Univ Auckland,"Pingdingshan Univ, China;Fudan Univ, China;Univ Tsukuba, Japan;Shantou Univ, China;Shenzhen Univ, China;Chinese Acad Sci, China;Univ Auckland, New Zealand","Wang, Minjie; Wang, Li; Li, Qingbin; Wang, Dan; Yang, Liu; Han, Yongjun; Ren, Yuan; Tian, Gang; Zheng, Xiaoyang; Ji, Muwei; Zhu, Caizhen; Peng, Lishan; Waterhouse, Geoffrey I. N."
"Geng, H., Zhao, H., Yang, L., Li, Z., Ran, J., Li, N.B.",Regulation of Electron Transfer and Microstructure in RuN Single-Atom Catalysts and Their Catalytic Performance for CO/CO2 Hydrogenation,2025,ACS Sustainable Chemistry and Engineering,13,21,,7939,7948,,0,10.1021/acssuschemeng.5c01497,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105005749175&doi=10.1021%2Facssuschemeng.5c01497&partnerID=40&md5=5a801bd67f93f330d66a8ee1b651f8b0,"School of Chemistry and Chemical Engineering, Southwest University, Chongqing, China; School of Chemical Engineering and Technology, Sun Yat-Sen University, Guangzhou, Guangdong, China; Ltd., Wuhan, Hubei, China; School of Energy and Power Engineering, Chongqing University, Chongqing, China","Geng, Haojie, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, China; Zhao, Haobo, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, China; Yang, Le, School of Chemical Engineering and Technology, Sun Yat-Sen University, Guangzhou, Guangdong, China; Li, Zhuwan, Ltd., Wuhan, Hubei, China; Ran, Jingyu, School of Energy and Power Engineering, Chongqing University, Chongqing, China; Li, Nianbing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, China","In this study, we developed a new type of Ru-N-C single-atom catalyst (SAC) with an excellent catalytic performance for CO/CO<inf>2</inf> selective hydrogenation. RuN SACs were synthesized by constructing defects in the support with different coordination numbers and anchoring Ru species onto these vacancies. Three RuN<inf>x</inf> SACs (x = 2, 3, and 4) were synthesized: RuN<inf>2</inf> and RuN<inf>4</inf> SACs, which were obtained by direct calcination, and RuN<inf>3</inf>, which was obtained by high-temperature shock (HTS). HTS combined electrostatic adsorption and strong thermal coupling to anchor Ru atoms to N vacancies with a novel three-dimensional structure. The resulting RuN SACs exhibited excellent catalytic performance for the selective methanation of CO/CO<inf>2</inf>; in particular, RuN<inf>3</inf> achieved a CO conversion of 99% and a CH<inf>4</inf> selectivity of 95% under a gas hourly space velocity (GHSV)of 4255 h-1 at 150 °C. Electron transfer was observed between the Ru and N species, facilitating the formation of electron-deficient centers over the catalyst surface, which actively captured CO molecules, even at low CO pressures. Moreover, RuN SACs facilitated the breakage of the C-O chemical bond during the CO hydrogenation reaction and formation of a highly selective alkane product (CH<inf>4</inf>). Although the hydrogenation of CO<inf>2</inf> was performed simultaneously, its reactivity was lower, and only a small amount of CO gas was released to the atmosphere. Additionally, Ru atoms in RuN<inf>3</inf> possessed a unique protruding structure supported by the N species, which interacted with the reaction species at a high flux. Therefore, our novel RuN SACs can completely remove the CO species from H<inf>2</inf>-rich gas, which is beneficial for the stable operation of proton-exchange membrane fuel cells (PEMFCs). © 2025 American Chemical Society.",CO hydrogenation; CO2 hydrogenation; electron transfer; microstructures; RuN SACs,Bond strength (chemical); Coordination reactions; Covalent bonds; Hydrogenolysis; Catalytic performance; CO hydrogenation; CO2 hydrogenation; Electron transfer; Highest temperature; Ru species; RuN SAC; Single-atoms; Synthesised; ]+ catalyst; Hydrogen bonds,CO hydrogenation;CO2 hydrogenation;electron transfer;microstructures;RuN SACs;Bond strength (chemical);Coordination reactions;Covalent bonds;Hydrogenolysis;Catalytic performance;Highest temperature;Ru species;RuN SAC;Single-atoms;Synthesised;]+ catalyst;Hydrogen bonds,"H. Geng; School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, Southwest University, Chongqing, 400715, China; email: hjgeng@swu.edu.cn; J. Ran; School of Energy and Power Engineering, Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing, 400044, China; email: ranjy@cqu.edu.cn; N.B. Li; School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, Southwest University, Chongqing, 400715, China; email: linb@swu.edu.cn",,,,,,American Chemical Society,,,,,English,ACS Sustainable Chem. Eng.,Article,Scopus,,2-s2.0-105005749175,,China,swu.edu.cn,,,"Geng, H.; Zhao, H.; Yang, L.; Li, Z.; Ran, J.; Li, N.B."
"Tang, W.J., Ma, N.N., Fei, C.Q., Wang, Y.L.",Regulation of Hydroxyl Radicals Generated by Fe-N-C in Heterogeneous Electro-Fenton Reaction for Degradation of Organic Pollutants,2022,CHEMISTRYSELECT,7,18,e202200313,,,11,4,10.1002/slct.202200313,,"[Tang, Wujian; Ma, Nannan; Fei, Chuanqi; Wang, Yinling] Anhui Normal Univ, Coll Chem & Mat Sci, Anhui Key Lab Chemobiosensing, 189 Huajin South Rd, Wuhu 241000, Peoples R China",,"Metal-nitrogen-carbon (M-N-C) materials display high catalytic activity for the oxygen reduction reaction (ORR) but poor durability which is considered to be related to the hydroxyl radicals (center dot OH) generated in-situ. With reverse thinking, we try to increase the center dot OH for the degradation of organic pollutants. In this study, the Fe-N-C catalyst was prepared by pyrolyzing the composite of tannin-Fe film modified carboxylic CNT (TA-Fe-CNT) and ZIF-8. The center dot OH generated during the ORR process was regulated by catalyst composition, applied potential, catalyst loading and pH. Under the optimum conditions, the Fe-N-C-200 could degrade 86 % of methylene blue (MB) and reach a TOC removal rate of 21.2 % after 5 h through the heterogeneous electro-Fenton (HEF) system. Overall, this study not only finds new application for M-N-C materials but also provides some useful information for improving their durability in proton exchange membrane fuel cell (PEMFC) from the opposite perspective.",Heterogeneous catalysis; Electrochemistry; Oxygen Reduction Reaction; Fe-N-C; Hydroxyl radicals,OXYGEN REDUCTION; CATALYSTS; CATHODE; ELECTROCATALYSTS; AEROGEL; HOLLOW,Heterogeneous catalysis;Electrochemistry;Oxygen Reduction Reaction;Fe-N-C;Hydroxyl radicals;OXYGEN REDUCTION;CATALYSTS;CATHODE;ELECTROCATALYSTS;AEROGEL;HOLLOW,wangyl@mail.ahnu.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,2365-6549,,,,English,CHEMISTRYSELECT,Article,WoS,Chemistry,WOS:000792595500001,2-s2.0-85130066576,China,mail.ahnu.edu.cn,Anhui Normal Univ,"Anhui Normal Univ, China","Tang, Wujian; Ma, Nannan; Fei, Chuanqi; Wang, Yinling"
"Qu, X.M., Yan, Y.N., Zhang, Z.L., Tian, B.J., Yin, S.H., Cheng, X.Y., Huang, R., Jiang, Y.X., Sun, S.G.",Regulation Strategies for Fe-N-C and Co-N-C Catalysts for the Oxygen Reduction Reaction,2024,CHEMISTRY-A EUROPEAN JOURNAL,30,32,e202304003,,,16,14,10.1002/chem.202304003,,"[Qu, Ximing; Yan, Yani; Zhang, Zeling; Tian, Benjun] Zijin Min Grp Co Ltd, State Key Lab Comprehens Utilizat Low Grade Refrac, Xiamen 361000, Peoples R China; [Yin, Shuhu; Cheng, Xiaoyang; Huang, Rui; Jiang, Yanxia; Sun, Shigang] Xiamen Univ, Coll Chem & Chem Engn, Dept State Key Lab Phys Chem Solid Surfaces, Dept Chem, 422 Siming South Rd, Xiamen 361005, Peoples R China",,"Proton exchange membrane fuel cells (PEMFCs) and alkaline membrane fuel cells (AEMFCs) have received great attention as energy devices of the next generation. Accelerating oxygen reduction reaction (ORR) kinetics is the key to improve PEMFC and AEMFC performance. Platinum-based catalysts are the most widely used catalysts for the ORR, but their high price and low abundance limit the commercialization of fuel cells. Non-noble metal-nitrogen-carbon (M-N-C) is considered to be the most likely material class to replace Pt-based catalysts, among which Fe-N-C and Co-N-C have been widely studied due to their excellent intrinsic ORR performance and have made great progress in the past decades. With the improvement of synthesis technology and a deeper understanding of the ORR mechanism, some reported Fe-N-C and Co-N-C catalysts have shown excellent ORR activity close to that of commercial Pt/C catalysts. Inspired by the progress, regulation strategies for Fe-N-C and Co-N-C catalysts are summarized in this Review from 5 perspectives: (1) coordinated atoms, (2) environmental heteroatoms and defects, (3) dual-metal active sites, (4) metal-based particle promoters, and (5) curved carbon layers. We also make suggestions on some challenges facing Fe-N-C and Co-N-C research. Fe-N-C and Co-N-C have been widely studied due to their excellent intrinsic oxygen reduction reaction performance. Regulation strategies for Fe-N-C or Co-N-C catalysts are summarized in this Review from 5 perspectives: (1) coordinated atoms, (2) environmental heteroatoms and defects, (3) dual-metal active sites, (4) metal-based particle promoters, and (5) curved carbon layers. image",oxygen reduction reaction; iron/cobalt-nitrogen-carbon; intrinsic activity; active sites,METAL-ORGANIC-FRAMEWORK; PEM FUEL-CELLS; DOPED CARBON; ACTIVE-SITES; EFFICIENT ELECTROCATALYSTS; POROUS CARBON; IRON; PERFORMANCE; NANOPARTICLES; DURABILITY,oxygen reduction reaction;iron/cobalt-nitrogen-carbon;intrinsic activity;active sites;METAL-ORGANIC-FRAMEWORK;PEM FUEL-CELLS;DOPED CARBON;ACTIVE-SITES;EFFICIENT ELECTROCATALYSTS;POROUS CARBON;IRON;PERFORMANCE;NANOPARTICLES;DURABILITY,rhuang@xmu.edu.cn; yxjiang@xmu.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,0947-6539,,,38573800,English,CHEM-EUR J,Review,WoS,Chemistry,WOS:001214192100001,2-s2.0-85192065304,China,xmu.edu.cn,Zijin Min Grp Co Ltd;Xiamen Univ,"Zijin Min Grp Co Ltd, China;Xiamen Univ, China","Qu, Ximing; Yan, Yani; Zhang, Zeling; Tian, Benjun; Yin, Shuhu; Cheng, Xiaoyang; Huang, Rui; Jiang, Yanxia; Sun, Shigang"
"Shao, R., Wang, L., Zhang, X., Han, S., Xuan, C., Cheng, X., Wang, Z.",Research Progress in Non-Precious Metal Fe-N-C Catalysts for Proton Exchange Membrane Fuel Cells; 质子交换膜燃料电池非贵金属型 Fe-N-C 催化剂的研究进展,2023,Chemistry Bulletin / Huaxue Tongbao,86,12,,1426,1433,,0,,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85188150803&partnerID=40&md5=3a9358ddee568b73f4fe853a5cc0cb6c,"School of Energy and Power Engineering, Qilu University of Technology, Jinan, Shandong, China; Shandong University, Jinan, Shandong, China","Shao, Ranlei, School of Energy and Power Engineering, Qilu University of Technology, Jinan, Shandong, China; Wang, Luyuan, School of Energy and Power Engineering, Qilu University of Technology, Jinan, Shandong, China; Zhang, Xingyu, School of Energy and Power Engineering, Qilu University of Technology, Jinan, Shandong, China; Han, Shiwang, School of Energy and Power Engineering, Qilu University of Technology, Jinan, Shandong, China; Xuan, Chengbo, School of Energy and Power Engineering, Qilu University of Technology, Jinan, Shandong, China; Cheng, Xingxing, Shandong University, Jinan, Shandong, China; Wang, Zhiqiang, Shandong University, Jinan, Shandong, China","Proton exchange membrane fuel cells are considered as the most promising alternative to solve environmental and energy problems due to their green, sustainable and high efficiency. The core of fuel cells is catalyst, the most mature catalyst at present is platinum group precious metals. But the high cost of catalyst restricts the rapid promotion of fuel cells. In addition, platinum group metals are sensitive to CO, NH<inf>3</inf> and other gases, making the fuel purity requirements harsh. Therefore, the development of high-performance low-cost catalyst to replace precious metals is an important way to promote the commercialization of fuel cells. In this paper, the research achievements of Fe-N-C catalysts for fuel cells in recent years are summarized, and the effects of Cu, Co and other metal doping are reviewed. The effects of preparation method, support, nitrogen source and metal doping on oxygen reduction activity and durability of Fe-N-C catalyst were analyzed in detail, and the deactivation mechanism of the catalyst was discussed. Finally, the future development direction of Fe-N-C catalyst was prospected, and the plan of improving the activity and durability of catalyst and optimizing the catalyst layer of fuel cell was proposed. © 2023 Editorial Office of Huaxue Tongbao. All rights reserved.",Durability; Fe-N-C catalyst; Oxygen reduction reaction; Proton exchange membrane fuel cell,,Durability;Fe-N-C catalyst;Oxygen reduction reaction;Proton exchange membrane fuel cell,"L. Wang; School of Energy and Power Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, 250014, China; email: luyuanwang1988@126.com",,,,,,Editorial Office of Huaxue Tongbao,04413776,,HHTPA,,Chinese,Chem. Bull.,Review,Scopus,,2-s2.0-85188150803,,China,126.com,,,"Shao, R.; Wang, L.; Zhang, X.; Han, S.; Xuan, C.; Cheng, X.; Wang, Z."
"Du, Z.Z., Wang, J., Wang, J., Yu, F., Li, J.L., Wang, X.D.",Research progress of key materials in proton exchange membrane fuel cell br,2022,CAILIAO GONGCHENG-JOURNAL OF MATERIALS ENGINEERING,50,12,,35,50,16,4,10.11868/j.issn.1001-4381.2022.000040,,"[Du, Zhenzhen; Wang, Jun; Yu, Fan; Li, Jiongli; Wang, Xudong] AECC Beijing Inst Aeronaut Mat, Beijing 100095, Peoples R China; [Du, Zhenzhen; Wang, Jun; Wang, Jing; Yu, Fan; Li, Jiongli; Wang, Xudong] Beijing Inst Graphene Technol, Beijing 100094, Peoples R China; [Du, Zhenzhen; Wang, Jun; Wang, Jing; Yu, Fan; Li, Jiongli; Wang, Xudong] Beijing Engn Res Ctr Graphene Applicat, Beijing 100095, Peoples R China",,"Fuel cell, which directly enables the generation of electricity from the conversion of the fuel through an electrochemical reaction at the electrode and electrolyte interface, without going through the heat engine process, is an incredibly powerful renewable energy technology. The electrochemical reaction in fuel cell is not restricted by the Carnot cycle, so it has high energy conversion efficiency. Proton exchange membrane fuel cell (PEMFC), in particular, has been regarded as the most promising candidate for transportations, portable equipment and fixed devices.However, there are still some problems in PEMFC, including high cost, insufficient power and poor stability, which limit the large-scale commercial application of PEMFC. The basic reason behind these problems lies in the key materials, such as cathode catalyst, gas diffusion layer, proton exchange membrane and bipolar plate in fuel cell, which can not meet the requirements of PEMFC commercialization owing to their high cost and low performance. Therefore, in order to achieve large-scale application of PEMFC, advanced cathode catalysts, gas diffusion layers, proton exchange membranes and bipolar plates are needed. For the requirement of low-cost and high-performance advanced materials for PEMFC, the research status of these key materials and main challenges in their practical application were summarized in the review, and the future development direction was pointed out: developing the technology of large-scale preparation of platinum alloy and metal-nitrogen-carbon (M-N-C) compound catalysts, preparation of proton exchange membranes with high proton conductivity and excellent mechanical property, studying the influence of modified gas diffusion layer on PEMFC performance under different working conditions, developing coatings or new metal materials with excellent corrosion resistance and electrical conductivity for bipolar plates.",fuel cell; key material; proton exchange membrane; catalyst; gas diffusion layer; bipolar plate,OXYGEN REDUCTION REACTION; GAS-DIFFUSION LAYER; NITROGEN-DOPED CARBON; METAL-ORGANIC FRAMEWORKS; 316L STAINLESS-STEEL; HIGH-TEMPERATURE; BIPOLAR PLATES; MICROPOROUS LAYER; FUNCTIONALIZED GRAPHENE; CORROSION-RESISTANCE,fuel cell;key material;proton exchange membrane;catalyst;gas diffusion layer;bipolar plate;OXYGEN REDUCTION REACTION;GAS-DIFFUSION LAYER;NITROGEN-DOPED CARBON;METAL-ORGANIC FRAMEWORKS;316L STAINLESS-STEEL;HIGH-TEMPERATURE;BIPOLAR PLATES;MICROPOROUS LAYER;FUNCTIONALIZED GRAPHENE;CORROSION-RESISTANCE,netfacn@163.com,,"PO BOX 81 62, BEIJING, 100095, PEOPLES R CHINA",,,,BEIJING INST AERONAUTICAL MATERIALS-BIAM,1001-4381,,,,English,CAILIAO GONGCHENG,Article,WoS,Materials Science,WOS:001043385500004,2-s2.0-85144613557,China,163.com,AECC Beijing Inst Aeronaut Mat;Beijing Inst Graphene Technol;Beijing Engn Res Ctr Graphene Applicat,"AECC Beijing Inst Aeronaut Mat, China;Beijing Inst Graphene Technol, China;Beijing Engn Res Ctr Graphene Applicat, China","Du, Zhenzhen; Wang, Jun; Wang, Jing; Yu, Fan; Li, Jiongli; Wang, Xudong"
"Dong, Y.N., Li, H., Gong, X., Han, C., Song, P., Xu, W.L.",Research Progress of Non-Pt-Based Catalysts in Cathode Oxygen Reduction Reaction of Proton Exchange Membrane Fuel Cells; 非 Pt 基催化剂在质子交换膜燃料电池阴极氧还原反应中的研究进展,2023,Chinese Journal of Applied Chemistry,40,8,,1077,1093,,6,10.19894/j.issn.1000-0518.230075,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85181465562&doi=10.19894%2Fj.issn.1000-0518.230075&partnerID=40&md5=e7cb91c90ef4419b25d0d76ea91d4fc4,"State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China","Dong, Yining, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Li, He, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Gong, Xue, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Han, Ce, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Song, Ping, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Xu, Weilin, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China",With the increasing demand for green and efficient energy storage devices，advanced technologies for clean energy conversion have attracted close attention from researchers. Fuel cells with environmental friendliness and high energy conversion efficiency are promising alternatives to traditional energy sources. However，Pt catalysts with high commercialization degrees in the industrial catalysis field have some problems，such as high cost，poor stability and weak anti-toxicity ability，which limits the further development of fuel cells. The development of non-Pt oxygen reduction reaction（ORR）catalysts with abundant reserves，low cost and excellent performance is an effective way to improve the efficiency of fuel cells. In this paper，based on the research results at home and abroad in recent years，various types of non-Pt system ORR catalysts，including non-precious metal and non-metal catalysts，are systematically introduced. The advantages，disadvantages and modification strategies of various catalysts are summarized，and challenges and prospects for the development of ORR electrocatalysts are put forward. © The Author(s) 2023.,Non-metal catalyst; Non-precious metal catalyst; Oxygen reduction reaction; Proton exchange membrane fuel cell,,Non-metal catalyst;Non-precious metal catalyst;Oxygen reduction reaction;Proton exchange membrane fuel cell,"P. Song; State Key Laboratory of Electroanalytical Chemistry, Jilin Province Key Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: songping@ciac.ac.cn; W.-L. Xu; State Key Laboratory of Electroanalytical Chemistry, Jilin Province Key Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: weilinxu@ciac.ac.cn",,,,,,Science China Press,10000518,,,,Chinese,Chin. J. Appl. Chem.,Article,Scopus,,2-s2.0-85181465562,,China,ciac.ac.cn,,,"Dong, Y.-N.; Li, H.; Gong, X.; Han, C.; Song, P.; Xu, W.-L."
"Lan, C., Chu, Y.Y., Wang, S., Liu, C.P., Ge, J.J., Xing, W.",Research Progress of Proton-Exchange Membrane Fuel Cell Cathode Nonnoble Metal M-Nx/C-Type Oxygen Reduction Catalysts,2023,ACTA PHYSICO-CHIMICA SINICA,39,8,2210036,,,20,16,10.3866/PKU.WHXB202210036,,"[Lan, Chang; Chu, Yuyi; Wang, Shuo; Liu, Changpeng; Ge, Junjie; Xing, Wei] Chinese Acad Sci, Changchun Inst Appl Chem, Changchun 130022, Peoples R China; [Lan, Chang; Chu, Yuyi; Wang, Shuo] Univ Sci & Technol China, Sch Appl Chem & Engn, Hefei 230026, Peoples R China",,"Proton-exchange membrane fuel cells (PEMFCs) are an efficient and clean energy conversion technology with the advantage of zero pollution for transportation applications. The oxygen reduction reaction (ORR) is the key step in the energy conversion at the cathode, but the slow kinetics requires a high content of expensive platinum-group -metal (PGM) catalysts. Therefore, research on high-performance and inexpensive catalysts to replace PGM-based catalysts are essential to promote the commercialization of fuel cells. Single-atom catalysts (SACs) with highly active sites that are atomically dispersed on substrates exhibit unique advantages, such as maximum atomic utilization, abundant chemical structures, and extraordinary catalytic performances for multiple important reactions. Inspired by macrocyclic compounds with MN4 active centers, the application of pyrolyzed M-NX/C type SACs (M = Fe, Co, Mn, Ru, Cr, Zn, etc.) in the ORR has significantly progressed within the last ten years. Particularly, single-atom Fe-N-C catalysts have been extensively investigated, demonstrating high ORR activity, which indicates that the initial electrochemistry and fuel cell performance are similar to that of conventional Pt/C catalysts. However, in the oxidizing and acidic PEMFC cathode, Fe-N-C catalysts are degraded rapidly, which hinders the application of these nonprecious metal M-NX/C-type catalysts. Several degradation mechanisms have been proposed over the past few years, such as carbon oxidation, demetallation, and waterflooding. However, the degradation mechanisms remain unknown and require further investigation of the underlying causes of the mechanism, degradation process, and coping strategies. To achieve the future commercialization of high-performance M-NX/C catalysts, several key challenges are summarized with potential research guidelines proposed to overcome bottlenecks. This review summarizes the development history and state-of-the-art research progress on nonprecious metal M-NX/C-type catalysts in PEMFCs. First, we introduce the basic theory of the ORR and the methods of advanced characterization techniques for active site identification and reaction mechanism analysis to gain a comprehensive understanding of the structure-performance relationship. Subsequently, the representative studies and recent advancements in M-NX/C-type catalysts by experimental and theoretical calculations are presented. Additionally, we analyze the root cause of the stability problems and propose the corresponding solution strategies to promote the intrinsic electrocatalytic ORR activity and durability, including regulating the electronic structure and coordination environment, as well as altering the central metal atoms and guest groups. Finally, we propose that the future direction of M-NX/C-type catalysts is the rational design of catalysts with a high site density and high stability. Moreover, improving the lifetime of nonprecious metal catalysts remains essential for feasible applications in the future.",Proton exchange membrane fuel cell; Oxygen reduction reaction; Non-precious metal catalyst; Stability; Electrocatalysis,N-C ELECTROCATALYST; ACTIVE-SITES; DOPED CARBON; FE; PERFORMANCE; IRON; FE/N/C; DURABILITY; QUANTIFICATION; IMPROVE,Proton exchange membrane fuel cell;Oxygen reduction reaction;Non-precious metal catalyst;Stability;Electrocatalysis;N-C ELECTROCATALYST;ACTIVE-SITES;DOPED CARBON;FE;PERFORMANCE;IRON;FE/N/C;DURABILITY;QUANTIFICATION;IMPROVE,gejj@ciac.ac.cn; xingwei@ciac.ac.cn,,"PEKING UNIV, CHEMISTRY BUILDING, BEIJING 100871, PEOPLES R CHINA",,,,PEKING UNIV PRESS,1000-6818,,,,English,ACTA PHYS-CHIM SIN,Review,WoS,Chemistry,WOS:000972047300006,2-s2.0-85152920250,China,ciac.ac.cn,Chinese Acad Sci;Univ Sci & Technol China,"Chinese Acad Sci, China;Univ Sci & Technol China, China","Lan, Chang; Chu, Yuyi; Wang, Shuo; Liu, Changpeng; Ge, Junjie; Xing, Wei"
"Chen, Y., Huang, Z.Y., Yu, J.F., Wang, H.Y., Qin, Y.K., Xing, L.X., Du, L.",Research Progress of Pt-Based Catalysts toward Cathodic Oxygen Reduction Reactions for Proton Exchange Membrane Fuel Cells,2024,CATALYSTS,14,9,569,,,34,13,10.3390/catal14090569,,"[Chen, Yue; Huang, Zhiyin; Yu, Jiefen; Wang, Haiyi; Qin, Yukuan; Xing, Lixin; Du, Lei] Guangzhou Univ, Huangpu Hydrogen Energy Innovat Ctr, Sch Chem & Chem Engn, Guangzhou 510006, Peoples R China",,"Proton exchange membrane fuel cells (PEMFCs) have been considered by many countries and enterprises because of their cleanness and efficiency. However, due to their high cost and low platinum utilization rate, the commercialization process of PEMFC is severely limited. The cathode catalyst layer (CCL) plays an important role in manipulating the performance and lifespan of PEMFCs, which makes them one of the most significant research focuses in this community. In the CCL, the intrinsic activity and stability of the catalysts determine the performance and lifetime of the catalyst layer. In this paper, the composition and working principle of the PEMFC and cathode catalyst layer are briefly introduced, focusing on Pt-based catalysts for oxygen reduction reactions (ORRs). The research progress of Pt-based catalysts in the past five years is particularly reviewed, mainly concentrating on the development status of emerging Pt-based catalysts which are popular in the current research field, including novel concepts like phase regulation (intermetallic alloys and high-entropy alloys), interface engineering (coupled low-Pt/Pt-free catalysts), and single-atom catalysts. Finally, the future research and development directions of Pt-based ORR catalysts are summarized and prospected.",proton exchange membrane fuel cell; cathode catalyst layer; oxygen reduction reaction; Pt-based catalysts,HIGH-ENTROPY ALLOYS; SINGLE-ATOM CATALYSTS; ACTIVE-SITE DENSITY; EVOLUTION REACTION; HIGH-PERFORMANCE; N-C; NANOPARTICLE CATALYSTS; PLATINUM NANOPARTICLES; ELECTRONIC-STRUCTURE; HIGHLY EFFICIENT,proton exchange membrane fuel cell;cathode catalyst layer;oxygen reduction reaction;Pt-based catalysts;HIGH-ENTROPY ALLOYS;SINGLE-ATOM CATALYSTS;ACTIVE-SITE DENSITY;EVOLUTION REACTION;HIGH-PERFORMANCE;N-C;NANOPARTICLE CATALYSTS;PLATINUM NANOPARTICLES;ELECTRONIC-STRUCTURE;HIGHLY EFFICIENT,32105170009@e.gzhu.edu.cn; zhiyin-huang@outlook.com; 32205100019@e.gzhu.edu.cn; 32205100078@e.gzhu.edu.cn; qinyukk2464@163.com; lixinxing@gzhu.edu.cn; lei.du@gzhu.edu.cn,,"ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND",,,,MDPI,,,,,English,CATALYSTS,Review,WoS,Chemistry,WOS:001323885800001,2-s2.0-85205097466,China,e.gzhu.edu.cn,Guangzhou Univ,"Guangzhou Univ, China","Chen, Yue; Huang, Zhiyin; Yu, Jiefen; Wang, Haiyi; Qin, Yukuan; Xing, Lixin; Du, Lei"
"Li, Z., Tu, Z.",Research progress of simulation models of proton exchange membrane fuel cell; 质子交换膜燃料电池仿真模型研究进展,2022,Huagong Jinzhan/Chemical Industry and Engineering Progress,41,10,,5272,5296,,5,10.16085/j.issn.1000-6613.2021-2604,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85140307258&doi=10.16085%2Fj.issn.1000-6613.2021-2604&partnerID=40&md5=61f9d0c8e7d4f0e8acf8b80e947b582d,"Huazhong University of Science and Technology, Wuhan, Hubei, China","Li, Zhenghan, Huazhong University of Science and Technology, Wuhan, Hubei, China; Tu, Zhengkai, Huazhong University of Science and Technology, Wuhan, Hubei, China","Proton exchange membrane fuel cell (PEMFC) is a green energy technology with great potential due to its advantages of high efficiency and zero emission. As a reasonable and reliable tool, mathematical models can guide the optimal design of PEMFC by simulating the electrochemical heat and mass transfer process inside PEMFC and study the influence of operating parameters and structural parameters on the performance and lifespan of PEMFC. In this paper, the research models of the PEMFC catalyst layer, gas diffusion layer and flow channel in recent years are reviewed, and the influencing factors and optimization methods of each component modeling are sorted out, which can provide a guideline for the modeling and optimal design of PEMFC. Considering the limitations of the current simulations, the main research directions in the future are the combination of the PEMFC system research and mechanism model, the modeling of catalytic layer microstructure, non-precious metal catalyst, gas diffusion layer degradation, large-area flow channel, and 3D temperature distribution, and the full-scale proton exchange membrane fuel cell model development. © 2022 Chemical Industry Press. All rights reserved.",catalyst layer; flow field; gas diffusion layer; modeling; proton exchange membrane fuel cell,Channel flow; Diffusion in gases; Optimal systems; Proton exchange membrane fuel cells (PEMFC); Catalysts layers; Cell-be; Cell/B.E; Flow channels; Gas diffusion layers; Modeling; Optimal design; Proton-exchange membranes fuel cells; Research models; Simulation model; Catalysts,catalyst layer;flow field;gas diffusion layer;modeling;proton exchange membrane fuel cell;Channel flow;Diffusion in gases;Optimal systems;Proton exchange membrane fuel cells (PEMFC);Catalysts layers;Cell-be;Cell/B.E;Flow channels;Gas diffusion layers;Optimal design;Proton-exchange membranes fuel cells;Research models;Simulation model;Catalysts,"Z. Tu; School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China; email: tzklq@hust.edu.cn",,,,,,"Chemical Industry Press Co., Ltd.",10006613,,,,Chinese,Huagong Jinzhan/Chem. Ind. Eng. Prog.,Article,Scopus,,2-s2.0-85140307258,,China,hust.edu.cn,,,"Li, Z.; Tu, Z."
"Lian, Y., Xu, J., Zhou, W., Lin, Y., Bai, J.",Research Progress on Atomically Dispersed Fe-N-C Catalysts for the Oxygen Reduction Reaction,2024,Molecules,29,4,771,,,,20,10.3390/molecules29040771,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85186159523&doi=10.3390%2Fmolecules29040771&partnerID=40&md5=6435cf798cde3965d4be339bf3cbd1ad,"School of Optoelectronic Engineering, Chang Zhou Institute of Technology, Changzhou, Jiangsu, China; School of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou, Jiangsu, China; Research Center of Secondary Resources and Environment, Chang Zhou Institute of Technology, Changzhou, Jiangsu, China","Lian, Yuebin, School of Optoelectronic Engineering, Chang Zhou Institute of Technology, Changzhou, Jiangsu, China; Xu, Jinnan, School of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou, Jiangsu, China; Zhou, Wangkai, School of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou, Jiangsu, China; Lin, Yao, Research Center of Secondary Resources and Environment, Chang Zhou Institute of Technology, Changzhou, Jiangsu, China; Bai, Jirong, Research Center of Secondary Resources and Environment, Chang Zhou Institute of Technology, Changzhou, Jiangsu, China","The efficiency and performance of proton exchange membrane fuel cells (PEMFCs) are primarily influenced by ORR electrocatalysts. In recent years, atomically dispersed metal–nitrogen–carbon (M-N-C) catalysts have gained significant attention due to their high active center density, high atomic utilization, and high activity. These catalysts are now considered the preferred alternative to traditional noble metal electrocatalysts. The unique properties of M-N-C catalysts are anticipated to enhance the energy conversion efficiency and lower the manufacturing cost of the entire system, thereby facilitating the commercialization and widespread application of fuel cell technology. This article initially delves into the origin of performance and degradation mechanisms of Fe-N-C catalysts from both experimental and theoretical perspectives. Building on this foundation, the focus shifts to strategies aimed at enhancing the activity and durability of atomically dispersed Fe-N-C catalysts. These strategies encompass the use of bimetallic atoms, atomic clusters, heteroatoms (B, S, and P), and morphology regulation to optimize catalytic active sites. This article concludes by detailing the current challenges and future prospects of atomically dispersed Fe-N-C catalysts. © 2024 by the authors.",activity enhancement strategy; atomically dispersed; Fe-N-C; mechanism investigation; oxygen reduction reaction,carbon; fuel; oxygen; proton; atom; catalysis; catalyst; controlled study; degradation; energy conversion; membrane; review,activity enhancement strategy;atomically dispersed;Fe-N-C;mechanism investigation;oxygen reduction reaction;carbon;fuel;oxygen;proton;atom;catalysis;catalyst;controlled study;degradation;energy conversion;membrane;review,"Y. Lian; School of Optoelectronic Engineering, Changzhou Institute of Technology, Changzhou, 213032, China; email: lianyb@czu.cn; J. Bai; Research Center of Secondary Resources and Environment, School of Chemical Engineering and Materials, Changzhou Institute of Technology, Changzhou, 213022, China; email: baijr@czu.cn",,,,,,Multidisciplinary Digital Publishing Institute (MDPI),14203049,,MOLEF,38398523,English,Molecules,Review,Scopus,,2-s2.0-85186159523,,China,czu.cn,,,"Lian, Y.; Xu, J.; Zhou, W.; Lin, Y.; Bai, J."
"Deng, X., Zheng, X., Gong, Z., Tan, W., Pei, X.",Research Progress on Single Metal Atom Catalysts for Hydrogen Production by PEM Water Electrolysis with Lower Costs; 面向低成本纯水电解制氢技术的单原子化金属复合物析氢催化剂研究进展,2023,Xiyou Jinshu/Chinese Journal of Rare Metals,47,1,,43,58,,23,10.13373/j.cnki.cjrm.XY22060014,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85151037725&doi=10.13373%2Fj.cnki.cjrm.XY22060014&partnerID=40&md5=4b044f66574c7d553c5e0402b0960600,"Sinosteel Nanjing Huaxin Technology Co. Ltd., Nanjing, China; College of Civil Engineering, Nanjing Forestry University, Nanjing, Jiangsu, China; College of Environmental Engineering, Nanjing Institute of Technology, Nanjing, Jiangsu, China","Deng, Xiang, Sinosteel Nanjing Huaxin Technology Co. Ltd., Nanjing, China; Zheng, Xiaodan, College of Civil Engineering, Nanjing Forestry University, Nanjing, Jiangsu, China; Gong, Zhiwei, Sinosteel Nanjing Huaxin Technology Co. Ltd., Nanjing, China; Tan, Wenyi, College of Environmental Engineering, Nanjing Institute of Technology, Nanjing, Jiangsu, China; Pei, Xiaodong, Sinosteel Nanjing Huaxin Technology Co. Ltd., Nanjing, China",Hydrogen energy was regarded as an ideal solution for the zero-carbon emission chain of the whole energy application life-cycle. The intermittent power supplies generated by solar，wind，tidal or other forms could be converted to hydrogen gas through the water electrolysis technology. And by storage or transportation of the gas，hydrogen would be converted again to be high-quality electric energy with fuel cell technology whenever or wherever it was needed. Water electrolysis was regarded as an effective medium for the conversion from renewable electricity to hydrogen，which played a vital role on the realization of energy structure transformation and “double carbon”strategy of China. There were two main types of water electrolysis，alkaline or proton exchange membrane（PEM）. The alkaline water electrolysis technology was classic and already commercialized. However，the alkaline water electrolysis still had considerable drawbacks. For example，it was necessary to ensure a specific power load（at least >15% of the rated power）during the operation of alkaline water electrolysis stacks，otherwise it would cause serious damage to the service life of the stacks. In addition，the alkaline water electrolysis stacks required a long restart time after shutdown，which generally took 0.5~1 h. Another technical problem lay on that the hydrogen produced by alkaline water electrolysis was not strictly“green”. The impurities in the alkaline electrolyte were brought out with produced hydrogen which still need the high-cost post-treatment and purification process to achieve the required hydrogen purity for fuel cell application. These problems made it difficult for alkaline water hydrogen production technology to take advantage of the renewable electric energy with rapid fluctuation characteristics. Another emerging and promising commercial practice of water electrolysis was by applying electrolyzer stacks with acid-type PEM. Compared with the alkaline water electrolysis strategy，PEM electrolysis had a lot of merits such as higher dynamic response speed，larger output current density and enhanced system efficiency. However，the membrane electrode assembly（MEA）in PEM electrolysis stacks required platinum（Pt）based catalysts as the cathodes and iridium（Ir）based catalysts as the anodes. The large amount of noble metals required in MEA lead to expensive investment costs，which seriously limited the future development of PEM electrolyzers. On the issue of reducing the cost of noble metal catalysts，the effective strategies consisted of the fully utilization of noble metal atoms in the catalysts，or the exploration of new types of noble-metal-free catalysts with high activity and stability in acidic systems through the structural design of new generation catalytic materials and novel catalytic mechanisms. Driven by this goal，researchers had proposed a variety of novel material design，preparation and application routes，including nano/micro-morphology control，component structure optimization or catalytic three-phase interface design. Among them，single-atomic catalysis was recognized as an important strategy to reduce the consumption of noble metals. The development of stable and reliable single atom catalysts with noble-metal or even noble-metal-free components showing high reaction activity in acidic environment had become a common hotspot both for research and commercialization. This paper introduced the research and development of single atom catalysts and their application on the acidic hydrogen evolution reaction（HER）. For HER process in PEM-type hydrogen production，due to the harsh and strong acid reaction environment，the precious platinum metal-based materials such as Pt black or Pt/C seemed to be almost the only choice in order to satisfy both the activity and service life. Although a considerable amount of platinum was now adequate to drive HER reaction at a low overpotential thanks to the design and development of catalytic materials，it was still necessary to reduce the use of precious metals in the catalyst to at least one tenth of the current quantity considering the economic cost for the water electrolysis demonstration or commercial application under megawatt（MW）or even gigawatt（GW）levels in addition to the scarcity of precious metal resources. Compared with traditional Pt black and Pt/C，the Pt single-atom catalysts had proved to exhibit ultra-high mass specific activity and reaction efficiency，which demonstrated the promising potential to replace the classic catalyst system based on Pt nanoparticles. The single atom catalysts with no noble metal components represented the ultimate objective for the catalysts applied in commercial PEM electrolyzers. Although significant breakthroughs had been made with the novel transition metal Fe，Co，Mo as single atom active sites and porous carbon or MoS<inf>2</inf> as the supports，there was still a big gap on the overall HER performance compared to Pt single-atom catalysts，especially on the service life. The synthesis method，catalyst components，electrochemical performance and structure-activity relationship were also analyzed in details by two categories of noble-metal or noble-metal-free single atom catalysts. Finally，the summary and perspective on the development of single metal atom catalysts for HER with lower costs were illustrated. © 2023 Editorial Office of Chinese Journal of Rare Metals. All rights reserved.,hydrogen evolution catalyst; hydrogen production; low cost; single atom; water electrolysis,Carbon; Catalysts; Costs; Electric power systems; Electrodes; Electrolysis; Electrolytes; Electrolytic cells; Hydrogen storage; Investments; Life cycle; Platinum; Proton exchange membrane fuel cells (PEMFC); Solar power generation; Alkaline water electrolysis; Electric energies; Hydrogen evolution catalyst; Hydrogen-evolution; Low-costs; PEM electrolysis; Single metal atoms; Single-atoms; Water electrolysis; ]+ catalyst; Hydrogen production,hydrogen evolution catalyst;hydrogen production;low cost;single atom;water electrolysis;Carbon;Catalysts;Costs;Electric power systems;Electrodes;Electrolysis;Electrolytes;Electrolytic cells;Hydrogen storage;Investments;Life cycle;Platinum;Proton exchange membrane fuel cells (PEMFC);Solar power generation;Alkaline water electrolysis;Electric energies;Hydrogen-evolution;Low-costs;PEM electrolysis;Single metal atoms;Single-atoms;]+ catalyst,"X. Pei; Sinosteel Nanjing Advanced Materials Research Institute Co.，Ltd., Nanjing, 211100, China; email: typxd2000@aliyun.com",,,,,,Editorial Office of Chinese Journal of Rare Metals,02587076,,XIJID,,Chinese,Xiyou Jinshu,Review,Scopus,,2-s2.0-85151037725,,China,aliyun.com,,,"Deng, X.; Zheng, X.; Gong, Z.; Tan, W.; Pei, X."
"Payne, T.L., Benjamin, T.G., Garland, N.L., Kopasz, J.P.",Research Strategies for Development of an Efficient and Effective Electrocatalyst for Polymer Electrolyte Membrane Fuel Cells and Progress Summary,2008,"PROTON EXCHANGE MEMBRANE FUEL CELLS 8, PTS 1 AND 2",16,2,,1081,+,3,5,10.1149/1.2981949,,"[Payne, T. L.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA; [Benjamin, T. G.; Kopasz, J. P.] Argonne Natl Lab, Argonne, IL 60439 USA; [Garland, N. L.] US DOE, Washington, DC 20585 USA",,"The current electrocatalyst formulation for the polymer electrolyte membrane fuel cell (PEMFC), platinum supported on carbon (Pt/C), is known to be an effective promoter of redox reactions in fuel cells. However, the cost of Pt (currently similar to$2,000/troy ounce) hinders its use as a practical catalyst in commercial fuel cell-powered vehicles at current platinum loading. Another issue with respect to adoption of any electrocatalyst for vehicle applications is durability, especially in light of transportation drive cycle operation with start/stop, start-up/shut-down, and transient requirements. Thus, a robust alternative to current Pt/C technology is needed as the PEMFC electrocatalyst for the oxygen reduction reaction (ORR) on the cathode. The U.S. Department of Energy is funding cathode catalyst research on low-platinum group metal (PGM) catalysts, including alloys and core-shell systems, and on non-PGM catalysts. This paper provides an over-view of the issues, approaches, and status of the research.",,OXYGEN REDUCTION; CATALYSTS,OXYGEN REDUCTION;CATALYSTS,,"Fuller, T; Shinohara, K; Ramani, V; Shirvanian, P; Uchida, H; Cleghorn, S; Inaba, M; Mitsushima, S; Strasser, P; Nakagawa, H; Gasteiger, HA; Zawodzinski, T; Lamy, C","65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA",8th Symposium on Proton Exchange Membrane Fuel Cells,"Honolulu, HI","OCT, 2008",ELECTROCHEMICAL SOC INC,1938-5862,978-1-56677-648-6,,,English,ECS TRANSACTIONS,Proceedings Paper,WoS,Chemistry; Electrochemistry; Energy & Fuels,WOS:000271859300112,2-s2.0-63149127348,United States,No email,Oak Ridge Natl Lab;Argonne Natl Lab;US DOE,"Oak Ridge Natl Lab, United States;Argonne Natl Lab, United States;US DOE, United States","Payne, T. L.; Benjamin, T. G.; Garland, N. L.; Kopasz, J. P."
"Gong, L.Y., Wang, Y., Liu, J., Wang, X., Li, Y., Hou, S., Wu, Z.J., Jin, Z., Liu, C.P., Xing, W., Ge, J.J.",Reshaping the coordination and electronic structure of single atom sites on the right branch of ORR volcano plot,2023,CHINESE JOURNAL OF CATALYSIS,50,,,352,360,9,9,10.1016/S1872-2067(23)64460-2,,"[Gong, Liyuan; Liu, Jie; Wang, Xian; Li, Yang; Hou, Shuai; Jin, Zhao; Liu, Changpeng; Xing, Wei; Ge, Junjie] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Jilin Prov Key Lab Low Carbon Chem Power Sources, Changchun 130022, Jilin, Peoples R China; [Gong, Liyuan; Liu, Jie; Wang, Xian; Li, Yang; Liu, Changpeng; Xing, Wei; Ge, Junjie] Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China; [Gong, Liyuan; Liu, Jie; Wang, Xian; Li, Yang; Hou, Shuai; Jin, Zhao; Liu, Changpeng; Xing, Wei] Chinese Acad Sci, Changchun Inst Appl Chem, Lab Adv Power Sources, Changchun 130022, Jilin, Peoples R China; [Wang, Ying; Wu, Zhijian] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Jilin, Peoples R China; [Ge, Junjie] Dalian Natl Lab Clean Energy, Dalian 116023, Liaoning, Peoples R China",,"The coordination environment of atomic metal sites in single atom catalysts is of vital significance in tailoring the d-orbital states and thus the catalytic behavior towards oxygen reduction reaction (ORR), thereby offering great promise to boost activity via regulating the local chelation structure. Herein we designed a carbon coordination environment for the atomic M sites reside on the right leg of the volcano plot, to effectively counter balance the low adsorption energy of the metal center to oxygen species. Combining time-of-flight secondary ion mass spectrometry and density functional theory calculations, we unveiled the M-C coordination structure and the thus induced changes in electronic structure and ORR catalytic behavior. The reshape in coordination structure, i.e., the replacement of typical nitrogen coordination by low electronegativity carbon coordination, gives rise to exceptional intrinsic activity towards ORR. This work brings a new perspective to boost the activity of single atom catalysts on the weak bonding leg, with exceptional ORR activity being further expected through advancing the chelation structure.",Oxygen reduction reaction; Single atom catalyst; Coordination environment; Electronic structure; Adsorption energy of reaction; intermediate,OXYGEN REDUCTION ACTIVITY; PEM FUEL-CELLS; RATIONAL DESIGN; CATALYSTS; ELECTROCATALYSTS; HYDROGEN; CARBON; ENVIRONMENT; CHEMISTRY; EVOLUTION,Oxygen reduction reaction;Single atom catalyst;Coordination environment;Electronic structure;Adsorption energy of reaction;intermediate;OXYGEN REDUCTION ACTIVITY;PEM FUEL-CELLS;RATIONAL DESIGN;CATALYSTS;ELECTROCATALYSTS;HYDROGEN;CARBON;ENVIRONMENT;CHEMISTRY;EVOLUTION,zjin@ciac.ac.cn; xingwei@ciac.ac.cn; gejunjie@ustc.edu.cn,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0253-9837,,,,English,CHINESE J CATAL,Article,WoS,Chemistry; Engineering,WOS:001063102600001,,China,ciac.ac.cn,Chinese Acad Sci;Univ Sci & Technol China;Dalian Natl Lab Clean Energy,"Chinese Acad Sci, China;Univ Sci & Technol China, China;Dalian Natl Lab Clean Energy, China","Gong, Liyuan; Wang, Ying; Liu, Jie; Wang, Xian; Li, Yang; Hou, Shuai; Wu, Zhijian; Jin, Zhao; Liu, Changpeng; Xing, Wei; Ge, Junjie"
"Pavlicek, R., Barton, S.C., Leonard, N., Romero, H., McKinney, S., McCool, G., Serov, A., Abbott, D., Atanassov, P., Mukerjee, S.",Resolving Challenges of Mass Transport in Non Pt-Group Metal Catalysts for Oxygen Reduction in Proton Exchange Membrane Fuel Cells,2018,JOURNAL OF THE ELECTROCHEMICAL SOCIETY,165,9,,F589,F596,8,12,10.1149/2.0141809jes,,"[Pavlicek, Ryan; Abbott, Daniel; Mukerjee, Sanjeev] Northeastern Univ, Ctr Renewable Energy Technol NUCRET, Dept Chem & Chem Biol, Boston, MA 02115 USA; [Barton, Scott Calabrese; Leonard, Nathaniel] Michigan State Univ, Chem Engn & Mat Sci, E Lansing, MI 48824 USA; [Romero, Henry; McKinney, Sam; McCool, Geoffrey; Serov, Alexey] Pajarito Powder, Albuquerque, NM 87109 USA; [Serov, Alexey; Atanassov, Plamen] Univ New Mexico, Dept Chem & Biol Engn, Albuquerque, NM 87131 USA; [Leonard, Nathaniel] Tech Univ Berlin, Dept Chem, Chem Engn Div, Electrochem Energy Catalysis & Mat Sci Lab, D-10623 Berlin, Germany; [Abbott, Daniel] Paul Scherrer Inst, Electrochem Lab, CH-5232 Villigen, Switzerland",,"Mass transport properties of a pair of non-Platinum Group Metal (non-PGM) catalysts in proton exchange membrane fuel cells (PEMFCs) were evaluated through methods developed by Reshetenko et al., demonstrating that the use of different carrier gases can allow for the determination of the mass transport coefficient for oxygen in the gas phase and the electrolyte phase. The gas-phase and non-gas-phase resistances can be elucidated from the slope and intercept, respectively, of the total mass transport coefficient plotted as a function of molecular weight. It was determined through these experiments that the primary sources of mass transfer limitations of the non-PGMs when compared to the PGMs were the catalyst layer (non-gas-phase), rather than the flow fields (gas-phase, primarily Knudsen Diffusion effects), and the gas diffusion layer. This work was combined with a pseudo-2D, isothermal, steady state numerical model to estimate the gas-phase mass transfer coefficient and the fraction of hydrophobic, gas-phase pores in the catalyst layer. Sensitivity studies were also carried out, allowing for more information regarding the influence of several inherent factors on the mass transport limitations, and allow for additional validation of the model beyond simply the quality of the fit. (C) The Author(s) 2018. Published by ECS.",,ACTIVE-SITES; O2/N2 MIXTURES; IRON; PERFORMANCE; RESISTANCE; ELECTROCATALYSTS; O2/AR; O2/HE; HEAT; GAS,ACTIVE-SITES;O2/N2 MIXTURES;IRON;PERFORMANCE;RESISTANCE;ELECTROCATALYSTS;O2/AR;O2/HE;HEAT;GAS,s.mukerjee@neu.edu,,"65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA",,,,ELECTROCHEMICAL SOC INC,0013-4651,,,,English,J ELECTROCHEM SOC,Article,WoS,Electrochemistry; Materials Science,WOS:000440924800113,,United States;Germany;Switzerland,neu.edu,Northeastern Univ;Michigan State Univ;Pajarito Powder;Univ New Mexico;Tech Univ Berlin;Paul Scherrer Inst,"Northeastern Univ, United States;Michigan State Univ, United States;Pajarito Powder, United States;Univ New Mexico, United States;Tech Univ Berlin, Germany;Paul Scherrer Inst, Switzerland","Pavlicek, Ryan; Barton, Scott Calabrese; Leonard, Nathaniel; Romero, Henry; McKinney, Sam; McCool, Geoffrey; Serov, Alexey; Abbott, Daniel; Atanassov, Plamen; Mukerjee, Sanjeev"
"Zhou, Y.D., Yang, W., Utetiwabo, W., Lian, Y.M., Yin, X., Zhou, L., Yu, P.W., Chen, R.J., Sun, S.R.","Revealing of Active Sites and Catalytic Mechanism in N-Coordinated Fe, Ni Dual-Doped Carbon with Superior Acidic Oxygen Reduction than Single-Atom Catalyst",2020,JOURNAL OF PHYSICAL CHEMISTRY LETTERS,11,4,,1404,1410,13,168,10.1021/acs.jpclett.9b03771,,"[Zhou, Yaodan; Yang, Wen; Utetiwabo, Wellars; Lian, Yi-meng; Yin, Xue; Zhou, Lei; Yu, Peiwen] Beijing Inst Technol, Key Lab Cluster Sci, Minist Educ,Sch Chem & Chem Engn, Beijing Key Lab Photoelect Electrophoton Convers, Beijing 100081, Peoples R China; [Sun, Shaorui] Beijing Univ Technol, Beijing Key Lab Green Catalysis & Separat, Coll Environm & Energy Engn, Beijing 100124, Peoples R China; [Chen, Renjie] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China",,"Herein, we synthesized a Fe, Ni dual-metal embedded in porous nitrogen-doped carbon material to endow higher turnover frequency (TOF), lower H2O2 yield, and thus superior durability than for the single-atom catalyst for oxygen reduction in acid media. Quantitative X-ray absorption near edge structure (XANES) fitting and density functional theory (DFT) calculation were implemented to explore the active sites in the catalysts. The results suggest FeNi-N-6 with type I (each metal atom coordinated with four nitrogen atoms) instead of type II configuration (each metal atom coordinated with three nitrogen atoms) dominates the catalytic activity of the noble-metal free catalyst (NMFC). Further, theoretical calculation reveals that the oxygen reduction reaction (ORR) activity trend of different moieties was FeNi-N-6 (type I) > FeNi-N-6 (type II) > Fe-N-4 > Fe-2-N-6. Our research represents an important step for developing dual-metal doping NMFC for proton exchange membrane fuel cells (PEMFCs) by revealing its new structural configuration and correlation with catalytic activity.",,DENSITY-FUNCTIONAL THEORY; IRON; ELECTROCATALYST; IDENTIFICATION; FE/N/C,DENSITY-FUNCTIONAL THEORY;IRON;ELECTROCATALYST;IDENTIFICATION;FE/N/C,wenyang@bit.edu.cn; sunsr@bjut.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1948-7185,,,32004006,English,J PHYS CHEM LETT,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000515424300033,2-s2.0-85080841869,China,bit.edu.cn,Beijing Inst Technol;Beijing Univ Technol,"Beijing Inst Technol, China;Beijing Univ Technol, China","Zhou, Yaodan; Yang, Wen; Utetiwabo, Wellars; Lian, Yi-meng; Yin, Xue; Zhou, Lei; Yu, Peiwen; Chen, Renjie; Sun, Shaorui"
"Wang, X.Q., Li, Z.J., Qu, Y.T., Yuan, T.W., Wang, W.Y., Wu, Y., Li, Y.D.",Review of Metal Catalysts for Oxygen Reduction Reaction: From Nanoscale Engineering to Atomic Design,2019,CHEM,5,6,,1486,1511,26,763,10.1016/j.chempr.2019.03.002,,"[Wang, Xiaoqian; Li, Zhijun; Qu, Yunteng; Yuan, Tongwei; Wang, Wenyu; Wu, Yuen] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Sch Chem & Mat Sci, Hefei 230026, Anhui, Peoples R China; [Li, Yadong] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China",,"Platinum (Pt)-based catalysts have been unanimously considered the most efficient catalysts for the oxygen reduction reaction (ORR) in proton-exchange membrane fuel cells (PEMFCs). Unfortunately, the exorbitant cost of Pt hampers the widespread adoption and development of PEMFCs. Scientists have devoted tremendous efforts to achieving higher catalytic activity with less Pt usage by constructing delicate nanostructures. Substituting Pt with cheaper metals may be a feasible solution but suffers from a relatively low intrinsic activity. Recently, single-atom catalysts (SACs), which possess the highest metal utilization and excellent activity because of the minimum size of metal and unique coordination structure, are developing rapidly and have been regarded as a potential alternative to Pt-based materials. Here, we review the development of conventional Pt and nonprecious-metal-based ORR catalysts and summarize recent achievement in SACs for the ORR. A brief perspective on the remaining challenges and future directions of SACs is also presented.",,POROUS CARBON; EFFICIENT ELECTROREDUCTION; TRANSITION-METALS; PARTICLE-SIZE; IRON; PLATINUM; ELECTROCATALYSTS; SITES; GRAPHENE; NANOCRYSTALS,POROUS CARBON;EFFICIENT ELECTROREDUCTION;TRANSITION-METALS;PARTICLE-SIZE;IRON;PLATINUM;ELECTROCATALYSTS;SITES;GRAPHENE;NANOCRYSTALS,yuenwu@ustc.edu.cn; ydli@mail.tsinghua.edu.cn,,"50 HAMPSHIRE ST, FLOOR 5, CAMBRIDGE, MA 02139 USA",,,,CELL PRESS,2451-9294,,,,English,CHEM-US,Review,WoS,Chemistry,WOS:000476610100011,2-s2.0-85066921367,China,ustc.edu.cn,Univ Sci & Technol China;Tsinghua Univ,"Univ Sci & Technol China, China;Tsinghua Univ, China","Wang, Xiaoqian; Li, Zhijun; Qu, Yunteng; Yuan, Tongwei; Wang, Wenyu; Wu, Yuen; Li, Yadong"
"Kumar, K., Dubau, L., Jaouen, F., Maillard, F.",Review on the Degradation Mechanisms of Metal-N-C Catalysts for the Oxygen Reduction Reaction in Acid Electrolyte: Current Understanding and Mitigation Approaches,2023,Chemical Reviews,123,15,,9265,9326,,122,10.1021/acs.chemrev.2c00685,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85165632573&doi=10.1021%2Facs.chemrev.2c00685&partnerID=40&md5=6d9cb9653b8f61d20cbab555872a34a3,"Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France","Kumar, Kavita, Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Dubau, Laetitia, Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Jaouen, Frédéric, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Maillard, Frédéric M., Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France","One bottleneck hampering the widespread use of fuel cell vehicles, in particular of proton exchange membrane fuel cells (PEMFCs), is the high cost of the cathode where the oxygen reduction reaction (ORR) occurs, due to the current need of precious metals to catalyze this reaction. Electrochemists tackle this issue in the short/medium term by developing catalysts with improved utilization or efficiency of platinum, and in the longer term, by developing catalysts based on Earth-abundant elements. Considerable progress has been achieved in the initial performance of Metal-nitrogen-carbon (Metal-N-C) catalysts for the ORR, especially with Fe-N-C materials. However, until now, this high performance cannot be maintained for a sufficiently long time in an operating PEMFC. The identification and mitigation of the degradation mechanisms of Metal-N-C electrocatalysts in the acidic environment of PEMFCs has therefore become an important research topic. Here, we review recent advances in the understanding of the degradation mechanisms of Metal-N-C electrocatalysts, including the recently identified importance of combined oxygen and electrochemical potential. Results obtained in a liquid electrolyte and a PEMFC device are discussed, as well as insights gained from in situ and operando techniques. We also review the mitigation approaches that the scientific community has hitherto investigated to overcome the durability issues of Metal-N-C electrocatalysts. © 2023 American Chemical Society.",,Degradation; Electrolysis; Electrolytes; Electrolytic reduction; Iron compounds; Oxygen; Proton exchange membrane fuel cells (PEMFC); Acid electrolytes; Carbon catalysts; Degradation mechanism; Electrolyte currents; Fuel cell vehicles; Nitrogen-carbon; Oxygen reduction reaction; Performance; Proton-exchange membranes fuel cells; ]+ catalyst; Electrocatalysts,Degradation;Electrolysis;Electrolytes;Electrolytic reduction;Iron compounds;Oxygen;Proton exchange membrane fuel cells (PEMFC);Acid electrolytes;Carbon catalysts;Degradation mechanism;Electrolyte currents;Fuel cell vehicles;Nitrogen-carbon;Oxygen reduction reaction;Performance;Proton-exchange membranes fuel cells;]+ catalyst;Electrocatalysts,"F. Jaouen; ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, F-34293, France; email: frederic.jaouen@umontpellier.fr; F. Maillard; Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, Grenoble, F-38000, France; email: frederic.maillard@grenoble-inp.fr",,,,,,American Chemical Society,00092665,,CHREA,37432676,English,Chem. Rev.,Review,Scopus,,2-s2.0-85165632573,,France,umontpellier.fr,,,"Kumar, K.; Dubau, L.; Jaouen, F.; Maillard, F."
"Zhuang, C., Li, H., Zhang, X., Zhang, H., Wang, S., Sun, G.",Rh single-atom catalysts with optimized metal loading for direct CO-feed high-temperature proton exchange membrane fuel cells,2025,Journal of Materials Chemistry A,13,20,,14672,14680,,0,10.1039/d5ta00897b,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105003487514&doi=10.1039%2Fd5ta00897b&partnerID=40&md5=a0ce875b58c6b6a83a676abafdcf8f66,"Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China; University of Chinese Academy of Sciences, Beijing, China; Chinese Academy of Sciences, Beijing, Beijing, China","Zhuang, Chunqiang, Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China, University of Chinese Academy of Sciences, Beijing, China, Chinese Academy of Sciences, Beijing, Beijing, China; Li, Huanqiao, Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China, Chinese Academy of Sciences, Beijing, Beijing, China; Zhang, Xiaoming, Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China, Chinese Academy of Sciences, Beijing, Beijing, China; Zhang, Hong, Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China, University of Chinese Academy of Sciences, Beijing, China, Chinese Academy of Sciences, Beijing, Beijing, China; Wang, Suli, Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China, Chinese Academy of Sciences, Beijing, Beijing, China; Sun, Gongquan, Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China, Chinese Academy of Sciences, Beijing, Beijing, China","The presence of carbon monoxide (CO) in crude hydrogen is a significant factor hindering the commercialization of hydrogen fuel cells. Introducing a direct CO fuel cell upstream can selectively oxidize and remove CO from crude hydrogen, thereby releasing electrical energy. The purified crude hydrogen is then fed into the downstream hydrogen fuel cell, which helps mitigate the poisoning effect on platinum (Pt) catalysts. Rhodium (Rh) and iridium (Ir) based single-atom catalysts (SACs) have demonstrated potential in the electrochemical CO oxidation reaction (COOR). However, the low density of SAC active sites (Rh metal loading <1 wt%) hinders their further development for use in direct CO fueled PEMFCs. To address this challenge, a two-step pyrolysis method was developed, yielding a series of atomically dispersed Rh on N-doped carbon with several different Rh metal loadings from 0.25 wt% to 7.43 wt%. Half-cell test results demonstrated that with the increment of Rh loading, the overpotential for the COOR at 1 mA cm−2 of CO oxidation gradually decreased, while the limiting current density gradually increased, indicating the high COOR activity on the SAC with a higher metal loading. The optimum Rh metal loading was determined to be 2.88 wt% and the limiting current density was found to be 2.4 mA cm−2 with a mass activity of up to 4.18 A mg<inf>Rh</inf>−1. Furthermore, a peak power density of 208.4 mW cm−2 was achieved in a high-temperature single cell utilizing direct CO feed, thereby demonstrating a stable performance over a 22-hours period. This finding indicates a potential robust CO removal capability. © 2025 The Royal Society of Chemistry.",,Bioremediation; Cobalt; Electrochemical oxidation; Gas fuel purification; Platinum; Rhodium; Rhodium compounds; Commercialisation; Direct carbons; Electrical energy; High temperature proton exchange membrane fuel cells; Hydrogen fuel cells; Limiting current density; Metal loadings; Oxidation reactions; Single-atoms; ]+ catalyst; Hydrogen fuels,Bioremediation;Cobalt;Electrochemical oxidation;Gas fuel purification;Platinum;Rhodium;Rhodium compounds;Commercialisation;Direct carbons;Electrical energy;High temperature proton exchange membrane fuel cells;Hydrogen fuel cells;Limiting current density;Metal loadings;Oxidation reactions;Single-atoms;]+ catalyst;Hydrogen fuels,; ,,,,,,Royal Society of Chemistry,20507488,,JMCAE,,English,J. Mater. Chem. A,Article,Scopus,,2-s2.0-105003487514,,China,No email,,,"Zhuang, C.; Li, H.; Zhang, X.; Zhang, H.; Wang, S.; Sun, G."
"Mathur, A., Harish, S., Halder, A.",Role of Nitrogen Precursor on the Activity Descriptor towards Oxygen Reduction Reaction in Iron-Based Catalysts,2018,CHEMISTRYSELECT,3,23,,6542,6550,9,14,10.1002/slct.201801053,,"[Mathur, Ankita] Indian Inst Technol Mandi, Sch Engn, Mandi, HP, India; [Harish, Sivasankaran] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Thermal Sci & Engn Res Div, Nishi Ku, Fukuoka 8190395, Japan; [Halder, Aditi] Indian Inst Technol Mandi, Sch Basic Sci, Mandi, HP, India",,"Nitrogen-doped carbon nanostructures supported non-precious transition metal/metal oxide electrocatalysts are promising alternative to platinum-based electrocatalysts for oxygen reduction reaction (ORR) of polymer electrolyte membrane fuel cell (PEMFC). In this article, a variety of nitrogen-doped carbon- iron based electrocatalysts were prepared by pyrolyzing a particular nitrogen-containing precursor compound with iron oxide at various reaction conditions using hydrothermal method. Our experimental data showed that the ratio between nitrogen containing precursor and metal ions plays significant role in determining the performance of ORR. The increase in nitrogen containing active sites is not linearly proportional to the quantity of nitrogenous precursor. Careful investigation by different spectroscopic (e.g. X-ray photoelectron spectroscopy, Raman Spectroscopy) as well as microscopic techniques along with electrochemical studies, we can conclude that- (a) nitrogen precursor in the synthesis process plays significant role in determining the morphology and oxidation state of iron in final catalyst; and (b) the overall electrocatalytic behaviour of Fe-N-C based electrocatalysts are largely dependent upon the oxidation state and morphology of catalyst.",Iron oxide; Nitrogen atoms; Non Platinum Cathode Electrocatalyst; Oxygen Reduction Reaction; Polymer Electrolyte Membrane Fuel Cell,FE-N/C ELECTROCATALYSTS; MEMBRANE FUEL-CELLS; CARBON ELECTROCATALYSTS; CODOPED GRAPHENE; ALKALINE-MEDIUM; N-X; SITES; NANOPARTICLES; PERFORMANCE; OXIDE,Iron oxide;Nitrogen atoms;Non Platinum Cathode Electrocatalyst;Oxygen Reduction Reaction;Polymer Electrolyte Membrane Fuel Cell;FE-N/C ELECTROCATALYSTS;MEMBRANE FUEL-CELLS;CARBON ELECTROCATALYSTS;CODOPED GRAPHENE;ALKALINE-MEDIUM;N-X;SITES;NANOPARTICLES;PERFORMANCE;OXIDE,aditi@iitmandi.ac.in,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,2365-6549,,,,English,CHEMISTRYSELECT,Article,WoS,Chemistry,WOS:000435933100035,,India;Japan,iitmandi.ac.in,Indian Inst Technol Mandi;Kyushu Univ,"Indian Inst Technol Mandi, India;Kyushu Univ, Japan","Mathur, Ankita; Harish, Sivasankaran; Halder, Aditi"
"Chung, H.T., Wu, G., Li, Q., Zelenay, P.",Role of two carbon phases in oxygen reduction reaction on the Co-PPy-C catalyst,2014,International Journal of Hydrogen Energy,39,28,,15887,15893,,23,10.1016/j.ijhydene.2014.05.137,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84908229976&doi=10.1016%2Fj.ijhydene.2014.05.137&partnerID=40&md5=ed3aaaeaa8e2f9b50c89982f07767876,"Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States","Chung, Hoon Taek, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Wu, Gang, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Li, Qing, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Zelenay, Piotr S., Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, United States","In spite of a significant progress in their performance in recent years, the heat-treated metal-nitrogen-carbon (M-N-C) non-precious metal catalysts for oxygen reduction reaction (ORR) at the cathode of polymer electrolyte fuel cells (PEFCs) are in need of further improvement to match the activity and, especially, the stability of Pt-based nanoparticle catalysts of oxygen reduction. A better understanding of the role of individual components in M-N-C catalysts is vital for the development of more advanced formulations. In this work, using a cobalt-polypyrrole-carbon catalyst system as an example, we demonstrate that carbon originating from the organic nitrogen precursor (ONP) has different properties than the carbon support. Unlike the carbon originating from polypyrrole, the support carbon helps to enhance ORR performance but negatively impacts the stability. To the best of our knowledge, this may be the first time that the properties of the ONP-derived carbon are being differentiated from the properties of carbon in the carbon support, emphasizing the potential importance of carbon phases in ORR electrocatalysis on heat-treated M-N-C catalysts. © 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.",Carbon Polypyrrole; Non-precious metal catalyst; Oxygen reduction reaction; Polymer electrolyte fuel cell (PEFC),Carbon; Cobalt compounds; Electrocatalysis; Electrolytic reduction; Metal nanoparticles; Nanocatalysts; Nitrogen; Oxygen; Oxygen reduction reaction; Polypyrroles; Precious metals; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Carbon catalysts; Derived carbons; Individual components; Nanoparticle catalysts; Non-precious metal catalysts; Organic nitrogen; Oxygen Reduction; Polymer electrolyte fuel cells; Polyelectrolytes,Carbon Polypyrrole;Non-precious metal catalyst;Oxygen reduction reaction;Polymer electrolyte fuel cell (PEFC);Carbon;Cobalt compounds;Electrocatalysis;Electrolytic reduction;Metal nanoparticles;Nanocatalysts;Nitrogen;Oxygen;Polypyrroles;Precious metals;Proton exchange membrane fuel cells (PEMFC);Solid electrolytes;Carbon catalysts;Derived carbons;Individual components;Nanoparticle catalysts;Non-precious metal catalysts;Organic nitrogen;Oxygen Reduction;Polymer electrolyte fuel cells;Polyelectrolytes,,,,,,,Elsevier Ltd,03603199,0080311393,IJHED,,English,Int J Hydrogen Energy,Article,Scopus,,2-s2.0-84908229976,,United States,No email,,,"Chung, H.T.; Wu, G.; Li, Q.; Zelenay, P."
"Nabae, Y., Muthukrishnan, A., Wu, Y.",Rotating ring-disk electrode voltammetry considering the quasi-four electron reduction of oxygen for Fe/N/C catalysts,2017,ECS Transactions,80,8,,701,706,,1,10.1149/08008.0701ecst,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85050030649&doi=10.1149%2F08008.0701ecst&partnerID=40&md5=37ed28af3ef219e578ecf168a2d64574,"Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan","Nabae, Yuta, Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; Muthukrishnan, Azhagumuthu, Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan; Wu, Yun, Department of Materials Science and Engineering, Institute of Science Tokyo, Tokyo, Japan","Understanding the mechanism of the oxygen reduction is quite important to develop active cathode catalysts. This study demonstrates a novel analysis method to handle the oxygen reduction reaction (ORR) that includes both the four-electron and two-electron pathways. In this study, hydrogen peroxide voltammetry was conducted separately to evaluate the rate constant of the hydrogen peroxide reduction reaction (HPRR) more accurately, and the obtained data were combinatorially analyzed with those from the ORR experiments. First, mathematical modification of the conventional Damjanovic approach was carried out, and then a novel reaction model that considers the quasi-four-electron pathway was utilized to avoid overestimation of the four-electron pathway. ORR and HPRR voltammetry was carried out for a Fe/N/C catalyst and the same data were analyzed with the conventional Damjanovic-Hsueh method and newly proposed two methods, and the overestimation of four-electron pathway was successfully removed. © The Electrochemical Society.",,Catalysts; Electrodes; Electrons; Hydrogen peroxide; Oxidation; Oxygen; Oxygen reduction reaction; Peroxides; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Rate constants; Rotating disks; Voltammetry; Analysis method; Cathode catalyst; Four electrons; Four-electron reduction; Hydrogen peroxide reduction; Oxygen Reduction; Reaction model; Rotating ring-disk electrode; Electrolytic reduction,Catalysts;Electrodes;Electrons;Hydrogen peroxide;Oxidation;Oxygen;Oxygen reduction reaction;Peroxides;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Rate constants;Rotating disks;Voltammetry;Analysis method;Cathode catalyst;Four electrons;Four-electron reduction;Hydrogen peroxide reduction;Oxygen Reduction;Reaction model;Rotating ring-disk electrode;Electrolytic reduction,,"Jones, D.J.; Buechi, F.; Swider-Lyons, K.E.; Pintauro, P.N.; Uchida, H.; Schmidt, T.J.; Pivovar, B.S.; Gasteiger, H.A.; Weber, A.Z.; Shirvanian, P.A.; Fenton, J.M.; Fuller, T.F.; Shinohara, K.; Perry, K.A.; Strasser, P.; Coutanceau, C.; Mitsushima, S.; Mantz, R.A.; Narayan, S.; Ramani, V.; Ayers, K.E.; Kim, Y.-T.; Xu, H.",,"Symposium on Polymer Electrolyte Fuel Cells 17, PEFC 2017 - 232nd ECS Meeting",National Harbor,2017-10-01 through 2017-10-05,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-85050030649,,Japan,No email,,,"Nabae, Y.; Muthukrishnan, A.; Wu, Y."
"Kirliog, A.C., Olmez, B., Rahbarshendi, F., Buldu-Akturk, M., Yurum, A., Gursel, S.A., Kaplan, B.Y.",Scalable nano-sized Fe-N-C catalysts for fuel cells: Evaluating the impact of iron precursors and CeO2 addition,2024,MATERIALS RESEARCH BULLETIN,179,,112952,,,10,5,10.1016/j.materresbull.2024.112952,,"[Olmez, Burak; Rahbarshendi, Faezeh; Buldu-Akturk, Merve; Yurum, Alp; Gursel, Selmiye Alkan] Sabanci Univ, Fac Engn & Nat Sci, TR-34956 Istanbul, Turkiye; [Yurum, Alp; Gursel, Selmiye Alkan; Kaplan, Begum Yarar] Sabanci Univ SUNUM, Nanotechnol Res & Applicat Ctr, TR-34956 Istanbul, Turkiye",,"This study investigates the influence of different iron precursors and CeO2 integration on the performance of FeN-C catalysts, aiming to replace costly Pt-based catalysts in fuel cells. Nitrogen-doped reduced graphene oxides are synthesized through nitric acid and ammonia treatments for enhanced surface area utilization. Fe-N-C synthesis via iron decoration of these N-doped reduced graphene oxide using FeCl2, FeCl3, and FeSO4 precursors, along with CeO2 enhancement, is investigated. FeCl3 emerges as the most effective precursor, showing a substantial performance improvement (92 % and 54 % higher peak power density compared to FeSO4 and FeCl2, respectively). Additionally, the introduction of CeO2 leads to nearly 20 % increase in peak power densities for all developed Fe-N-C catalysts. This research highlights the potential of Fe-N-C catalysts, particularly those decorated with FeCl3 and integrated with CeO2, for efficient fuel cell applications, emphasizing their nanoscale advantages.",Fe-N-C; N-doped reduced graphene oxide; Iron precursors; CeO2 additives; PEM fuel cells,OXYGEN-REDUCTION REACTION; SPECTROSCOPY; NITROGEN; ALLOY; RAMAN,Fe-N-C;N-doped reduced graphene oxide;Iron precursors;CeO2 additives;PEM fuel cells;OXYGEN-REDUCTION REACTION;SPECTROSCOPY;NITROGEN;ALLOY;RAMAN,begumyarar@sabanciuniv.edu,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0025-5408,,,,English,MATER RES BULL,Article,WoS,Materials Science,WOS:001260565300001,2-s2.0-85196865717,Turkiye,sabanciuniv.edu,Sabanci Univ;Sabanci Univ SUNUM,"Sabanci Univ, Turkiye;Sabanci Univ SUNUM, Turkiye","Kirliog, Ahmet Can; Olmez, Burak; Rahbarshendi, Faezeh; Buldu-Akturk, Merve; Yurum, Alp; Gursel, Selmiye Alkan; Kaplan, Begum Yarar"
"Wang, Y.C., Lai, Y.J., Song, L., Zhou, Z.Y., Liu, J.G., Wang, Q., Yang, X.D., Chen, C., Shi, W., Zheng, Y.P., Rauf, M., Sun, S.G.",S-Doping of an Fe/N/C ORR Catalyst for Polymer Electrolyte Membrane Fuel Cells with High Power Density,2015,ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,54,34,,9907,9910,4,460,10.1002/anie.201503159,,"[Wang, Yu-Cheng; Lai, Yu-Jiao; Song, Lin; Zhou, Zhi-You; Liu, Jian-Guo; Wang, Qiang; Yang, Xiao-Dong; Chen, Chi; Shi, Wei; Zheng, Yan-Ping; Rauf, Muhammad; Sun, Shi-Gang] Xiamen Univ, Coll Chem & Chem Engn, Collaborat Innovat Ctr Chem Energy Mat, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China; [Liu, Jian-Guo] Nanjing Univ, Ecomat & Renewable Energy Res Ctr, Dept Mat Sci & Engn, Nanjing 210093, Jiangsu, Peoples R China; [Liu, Jian-Guo] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China; [Chen, Chi] E China Univ Sci & Technol, Coll Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China",,"Fe/N/C is a promising non-Pt electrocatalyst for the oxygen reduction reaction (ORR), but its catalytic activity is considerably inferior to that of Pt in acidic medium, the environment of polymer electrolyte membrane fuel cells (PEMFCs). An improved Fe/N/C catalyst (denoted as Fe/N/C-SCN) derived from Fe(SCN)(3), poly-m-phenylenediamine, and carbon black is presented. The advantage of using Fe(SCN)(3) as iron source is that the obtained catalyst has a high level of S doping and high surface area, and thus exhibits excellent ORR activity (23 Ag-1 at 0.80 V) in 0.1M H2SO4 solution. When the Fe/N/C-SCN was applied in a PEMFC as cathode catalyst, the maximal power density could exceed 1 W cm(-2).",electrocatalysis; fuel cells; iron; oxygen reduction reaction; sulfur,OXYGEN REDUCTION REACTION; CATHODE CATALYST; GRAPHENE; ELECTROCATALYSTS; IRON; PERFORMANCE,electrocatalysis;fuel cells;iron;oxygen reduction reaction;sulfur;CATHODE CATALYST;GRAPHENE;ELECTROCATALYSTS;PERFORMANCE,zhouzy@xmu.edu.cn; sgsun@xmu.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1433-7851,,,26140619,English,ANGEW CHEM INT EDIT,Article,WoS,Chemistry,WOS:000360215100026,2-s2.0-84938958208,China,xmu.edu.cn,Xiamen Univ;Nanjing Univ;E China Univ Sci & Technol,"Xiamen Univ, China;Nanjing Univ, China;E China Univ Sci & Technol, China","Wang, Yu-Cheng; Lai, Yu-Jiao; Song, Lin; Zhou, Zhi-You; Liu, Jian-Guo; Wang, Qiang; Yang, Xiao-Dong; Chen, Chi; Shi, Wei; Zheng, Yan-Ping; Rauf, Muhammad; Sun, Shi-Gang"
"Lin, X., Li, D.Y., Huang, S.Q., Sun, P.P., Huang, Y., Wang, S.T., Zheng, L.R., Cao, D.P.",Se-doping strategy regulating mass transfer and electronic structure of Fe-N-C electrocatalysts for proton exchange membrane fuel cells,2025,CHINESE JOURNAL OF CATALYSIS,75,,,73,83,11,0,10.1016/S1872-2067(25)64715-2,,"[Lin, Xu; Li, Danyang; Huang, Shiqing; Sun, Panpan; Huang, Yan; Wang, Shitao; Cao, Dapeng] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China; [Zheng, Lirong] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China",,"The limited activity of atomically-dispersed M-N-C electrocatalysts severely restricts their applicability in the oxygen reduction reaction (ORR) for proton exchange membrane fuel cells (PEMFC). Herein, we design and synthesize Se-doped Fe-N-C hierarchical porous electrocatalyst (FeN4/SeC2) by optimizing carbon structure and FeN4 coordination environment. The FeN4/SeC2 electrocatalyst exhibits outstanding ORR activity in 0.1 mol L-1 HClO4, and the resulting PEMFC presents a peak power density of 1.20 W cm-2 in H2-O2 condition at a back pressure of 200 kPa, ranking in the top levels among most reported non-precious metal catalyst-based fuel cells. The lower O2 transfer resistance of FeN4/SeC2-based membrane electrode assembly than FeN4-based one means faster O2 transport in triple-phase boundary (TPB), and Density functional theory calculation further reveals that the synergistic catalysis between porous SeC2 and FeN4-OH species can efficiently lower the energy barriers for the rate-determining step of the ORR. In short, the outstanding performance of FeN4/SeC2 in PEMFC is ascribed to the Se-doping, which introduces more defects and larger mesoporosity and therefore facilitates ionomer infiltration and O2 transfer and charge transfer in TPB. The effective strategy of enhancing mass and charge transfers in TPB is anticipated to be applicable in the construction of highly efficient ORR electrocatalysts. Published by Elsevier B.V. All rights reserved.",Se-doping; Synergistic catalysis; Enhancing mass transfer; Oxygen reduction; Proton exchange membrane fuel cells,OXYGEN-TRANSPORT RESISTANCE; SINGLE-ATOM CATALYSTS; ACTIVE-SITES; HIGH-PERFORMANCE; REDUCTION REACTION; CATHODE; LAYER; BEHAVIOR,Se-doping;Synergistic catalysis;Enhancing mass transfer;Oxygen reduction;Proton exchange membrane fuel cells;OXYGEN-TRANSPORT RESISTANCE;SINGLE-ATOM CATALYSTS;ACTIVE-SITES;HIGH-PERFORMANCE;REDUCTION REACTION;CATHODE;LAYER;BEHAVIOR,zhenglr@ihep.ac.cn; caodp@buct.edu.cn,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0253-9837,,,,English,CHINESE J CATAL,Article,WoS,Chemistry; Engineering,WOS:001589415900007,2-s2.0-105012369497,China,ihep.ac.cn,Beijing Univ Chem Technol;Chinese Acad Sci,"Beijing Univ Chem Technol, China;Chinese Acad Sci, China","Lin, Xu; Li, Danyang; Huang, Shiqing; Sun, Panpan; Huang, Yan; Wang, Shitao; Zheng, Lirong; Cao, Dapeng"
"Xia, D., Tang, F., Yao, X., Wei, Y., Cui, Y., Dou, M., Gan, L., Kang, F.",Seeded growth of branched iron–nitrogen-doped carbon nanotubes as a high performance and durable non-precious fuel cell cathode,2020,Carbon,162,,,300,307,,28,10.1016/j.carbon.2020.02.046,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85079888404&doi=10.1016%2Fj.carbon.2020.02.046&partnerID=40&md5=4eb3c597838f51a58362fcb315f8544b,"Shenzhen Geim Graphene Center, Tsinghua University, Beijing, China","Xia, Dongsheng, Shenzhen Geim Graphene Center, Tsinghua University, Beijing, China; Tang, Fei, Shenzhen Geim Graphene Center, Tsinghua University, Beijing, China; Yao, Xiaozhang, Shenzhen Geim Graphene Center, Tsinghua University, Beijing, China; Wei, Yinping, Shenzhen Geim Graphene Center, Tsinghua University, Beijing, China; Cui, Yuefei, Shenzhen Geim Graphene Center, Tsinghua University, Beijing, China; Dou, Miao, Shenzhen Geim Graphene Center, Tsinghua University, Beijing, China; Gan, Lin, Shenzhen Geim Graphene Center, Tsinghua University, Beijing, China; Kang, Feiyu, Shenzhen Geim Graphene Center, Tsinghua University, Beijing, China","Achieving a high-density Fe-N<inf>x</inf> moieties in a highly graphitic and porous carbon matrix is critical for developing iron/nitrogen-doped carbon (Fe–N/C) electrocatalysts with both high activity and high stability on oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). Herein, we report the growth of Fe/N-doped carbon nanotubes (CNTs) by pyrolysis of Fe-doped zeolitic imidazolate framework-8 (Fe-ZIF-8) precursors on a primary Fe/N-doped CNT seed. Such seeded growth enabled the successful conversion of the Fe-ZIF-8 precursor, with inherent Fe-N<inf>x</inf> complex, into a large number of secondary CNTs doped with high-density Fe-N<inf>x</inf> sites while keeping a high degree of graphitization. The resulted catalyst possesses high-density Fe-N<inf>x</inf> active sites, porous network, enhanced electron conductivity and improved anti-corrosion capability which lead to both improved performance and durability in PEMFCs compared to the pyrolyzed Fe-ZIF-8 catalyst (Fe-ZIF′). In addition, the highly graphitic structure combined with the hierarchically branched CNT network enables a high hydrophobicity for efficient water removal and thus much slower performance decay than the benchmark Fe-ZIF’ catalyst during accelerated stress tests. The successful introduction of active Fe-N<inf>x</inf> sites into highly graphitic and branched CNTs provides a new way for the development of durably active noble-metal-free ORR electrocatalysts. © 2020",Carbon nanotube; Fe–N/C; Oxygen reduction reaction; PEMFC; Stability,Benchmarking; Carbon nanotubes; Catalyst activity; Convergence of numerical methods; Corrosion; Doping (additives); Electrocatalysts; Electrolytic reduction; Nitrogen; Oxygen reduction reaction; Porous carbon; Porous materials; Precious metals; Proton exchange membrane fuel cells (PEMFC); Accelerated stress; Electron conductivity; Fuel cell cathodes; Graphitic structures; Nitrogen doped carbon nanotubes; ORR electrocatalysts; Proton exchange membrane fuel cell (PEMFCs); Zeolitic imidazolate framework-8; Iron compounds,Carbon nanotube;Fe–N/C;Oxygen reduction reaction;PEMFC;Stability;Benchmarking;Carbon nanotubes;Catalyst activity;Convergence of numerical methods;Corrosion;Doping (additives);Electrocatalysts;Electrolytic reduction;Nitrogen;Porous carbon;Porous materials;Precious metals;Proton exchange membrane fuel cells (PEMFC);Accelerated stress;Electron conductivity;Fuel cell cathodes;Graphitic structures;Nitrogen doped carbon nanotubes;ORR electrocatalysts;Proton exchange membrane fuel cell (PEMFCs);Zeolitic imidazolate framework-8;Iron compounds,"L. Gan; Shenzhen Geim Graphene Research Center, Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China; email: lgan@sz.tsinghua.edu.cn",,,,,,Elsevier Ltd,00086223,,CRBNA,,English,Carbon,Article,Scopus,,2-s2.0-85079888404,,China,sz.tsinghua.edu.cn,,,"Xia, D.; Tang, F.; Yao, X.; Wei, Y.; Cui, Y.; Dou, M.; Gan, L.; Kang, F."
"Yin, S.H., Yang, S.L., Li, G., Li, G., Zhang, B.W., Wang, C.T., Chen, M.S., Liao, H.G., Yang, J., Jiang, Y.X., Sun, S.G.",Seizing gaseous Fe2+ to densify O2-accessible Fe-N4 sites for high-performance proton exchange membrane fuel cells,2022,ENERGY & ENVIRONMENTAL SCIENCE,15,7,,3033,3040,8,106,10.1039/d2ee00061j,,"[Yin, Shu-Hu; Yang, Shuang-Li; Li, Gen; Li, Guang; Zhang, Bin-Wei; Chen, Ming-Shu; Liao, Hong-Gang; Yang, Jian; Jiang, Yan-Xia; Sun, Shi-Gang] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China; [Wang, Chong-Tai] Hainan Normal Univ, Coll Chem & Chem Engn, Key Lab Electrochem Energy Storage & Energy Conve, Haikou 571158, Hainan, Peoples R China",,"Increasing the density of Fe-N-4 sites in Fe-N-C materials is pivotal for enhancing the kinetics of the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). Fe utilization is a vital parameter for the Fe-N-C catalyst evaluation, but it shows a tendency to decrease with increasing density of the Fe-N-4 sites. Herein, dense edge Fe-N2+2 sites are deposited in the outermost and subsurface layers of a surface-rich pyridinic-N carbon substrate (Fe-g-NC/Phen). We have demonstrated that the surface-rich pyridinic-N carbon substrate is more favorable to form surface Fe-N2+2 sites with superior intrinsic activity. The surface Fe-N-4 sites can improve both the site density and Fe utilization, while shortening the transport pathways of protons and O-2 effectively. By means of these structural advantages, Fe-g-NC/Phen can exhibit a high current density of 0.046 A cm(-2)@0.9 ViR-free and a high peak power density (P-max) of 1.53 W cm(-2) in 2 bar H-2-O-2 PEMFCs, and outperform almost all the reported M-N-C catalysts. This outstanding performance will inspire relevant research in the distribution of active sites. Moreover, it requires particular attention to obtain a viable solution to performance durability in fuel cells.",,NITROGEN-DOPED GRAPHENE; N-C ELECTROCATALYST; OXYGEN REDUCTION; FE/N/C CATALYSTS; ACTIVE-SITES; IRON; CARBON; DESIGN,NITROGEN-DOPED GRAPHENE;N-C ELECTROCATALYST;OXYGEN REDUCTION;FE/N/C CATALYSTS;ACTIVE-SITES;IRON;CARBON;DESIGN,yxjiang@xmu.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,1754-5692,,,,English,ENERG ENVIRON SCI,Article,WoS,Chemistry; Energy & Fuels; Engineering; Environmental Sciences & Ecology,WOS:000804224100001,2-s2.0-85131965075,China,xmu.edu.cn,Xiamen Univ;Hainan Normal Univ,"Xiamen Univ, China;Hainan Normal Univ, China","Yin, Shu-Hu; Yang, Shuang-Li; Li, Gen; Li, Guang; Zhang, Bin-Wei; Wang, Chong-Tai; Chen, Ming-Shu; Liao, Hong-Gang; Yang, Jian; Jiang, Yan-Xia; Sun, Shi-Gang"
"Li, J., Xia, W., Xu, X., Jiang, D., Cai, Z.X., Tang, J., Guo, Y., Huang, X., Wang, T., He, J., Han, B., Yamauchi, Y.",Selective Etching of Metal-Organic Frameworks for Open Porous Structures: Mass-Efficient Catalysts with Enhanced Oxygen Reduction Reaction for Fuel Cells,2023,Journal of the American Chemical Society,145,50,,27262,27272,,77,10.1021/jacs.3c05544,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85179808024&doi=10.1021%2Fjacs.3c05544&partnerID=40&md5=e6532a88d312ac42293a664f2fe696a4,"Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, China; School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, China; Institute of Chemistry Chinese Academy of Sciences, Beijing, China; Department of Materials Process Engineering, Nagoya University, Nagoya, Aichi, Japan; The University of Queensland, Brisbane, QLD, Australia; Faculty of Science and Engineering, Waseda University, Tokyo, Japan; School of Environmental Science and Engineering, Kochi University of Technology, Kami, Kochi, Japan; Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, South Korea","Li, Jingjing, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, China, Faculty of Science and Engineering, Waseda University, Tokyo, Japan; Xia, Wei, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, China; Xu, Xingtao, Department of Materials Process Engineering, Nagoya University, Nagoya, Aichi, Japan; Jiang, Dong, Department of Materials Process Engineering, Nagoya University, Nagoya, Aichi, Japan; Cai, Zexing, School of Environmental Science and Engineering, Kochi University of Technology, Kami, Kochi, Japan; Tang, Jing, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, China; Guo, Yanna, Faculty of Science and Engineering, Waseda University, Tokyo, Japan; Huang, Xianli, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, China; Wang, Tao, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, China; He, Jianping, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, China; Han, Buxing, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, China, Institute of Chemistry Chinese Academy of Sciences, Beijing, China; Yamauchi, Yusuke, Department of Materials Process Engineering, Nagoya University, Nagoya, Aichi, Japan, The University of Queensland, Brisbane, QLD, Australia, Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, South Korea","Fe-N<inf>x</inf>-C-based single-atom (SA-Fe-N-C) catalysts have shown favorable oxygen reduction reaction (ORR) activity. However, their application in proton exchange membrane fuel cells is hindered by reduced performance owing to the thick catalyst layer, restricting mass transfer and the O<inf>2</inf> supply. Metal-organic frameworks (MOFs) are a promising class of crystal materials, but their narrow pores exacerbate the sluggish mass-transport properties within the catalyst layer. This study developed an approach for constructing an open-pore structure in MOFs via chelation-assisted selective etching, resulting in atomically dispersed Fe atoms anchored on an N, S co-doped carbon framework. The open-pore structure reduces oxygen transport resistance in the membrane electrode assembly (MEA) with unprecedented ORR activity and stability, as evidenced by finite element simulations. In an acidic electrolyte, the OP-Fe-NC catalyst shows a half-wave potential of 0.89 V vs RHE, surpassing Pt/C by 20 mV, and a current density of 29 mA cm-2 at 0.9 V<inf>iR-free</inf> in the MEA. This study provides an effective structural strategy for fabricating electrocatalysts with high mass efficiency and atomic precision for energy storage and conversion devices. © 2023 American Chemical Society.",,Atoms; Crystal atomic structure; Electrocatalysts; Electrolytes; Electrolytic reduction; Etching; Iron compounds; Mass transfer; Organometallics; Oxygen; Catalysts layers; Etching of metals; Membrane electrode assemblies; Metalorganic frameworks (MOFs); Open pores; Oxygen reduction reaction; Pores structure; Reaction activity; Selective etching; ]+ catalyst; Pore structure; fuel; metal organic framework; carbon; electrolyte; oxygen; proton; Article; atom; catalyst; chelation; current density; energy absorption; enhanced oxygen reduction reaction; extended X ray absorption fine structure spectroscopy; finite element analysis; linear sweep voltammetry; mass efficient catalyst; measurement precision; membrane; oxidation; oxygen transport; scanning electron microscopy; scanning transmission electron microscopy; transmission electron microscopy; X ray absorption near edge structure spectroscopy; accuracy; article; controlled study; electrode; oxygen supply; pharmaceutics,Atoms;Crystal atomic structure;Electrocatalysts;Electrolytes;Electrolytic reduction;Etching;Iron compounds;Mass transfer;Organometallics;Oxygen;Catalysts layers;Etching of metals;Membrane electrode assemblies;Metalorganic frameworks (MOFs);Open pores;Oxygen reduction reaction;Pores structure;Reaction activity;Selective etching;]+ catalyst;Pore structure;fuel;metal organic framework;carbon;electrolyte;proton;Article;atom;catalyst;chelation;current density;energy absorption;enhanced oxygen reduction reaction;extended X ray absorption fine structure spectroscopy;finite element analysis;linear sweep voltammetry;mass efficient catalyst;measurement precision;membrane;oxidation;oxygen transport;scanning electron microscopy;scanning transmission electron microscopy;transmission electron microscopy;X ray absorption near edge structure spectroscopy;accuracy;controlled study;electrode;oxygen supply;pharmaceutics,"W. Xia; School of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai, 200062, China; email: wxia@chem.ecnu.edu.cn; J. He; College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China; email: jianph@nuaa.edu.cn; B. Han; School of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai, 200062, China; email: hanbx@iccas.ac.cn; Y. Yamauchi; Department of Materials Process Engineering, Graduate School of Engineering, Nagoya University, Nagoya, 464−8603, Japan; email: y.yamauchi@uq.edu.au",,,,,,American Chemical Society,00027863,,JACSA,38071659,English,J. Am. Chem. Soc.,Article,Scopus,,2-s2.0-85179808024,,China;Japan;Australia;South Korea,chem.ecnu.edu.cn,,,"Li, J.; Xia, W.; Xu, X.; Jiang, D.; Cai, Z.-X.; Tang, J.; Guo, Y.; Huang, X.; Wang, T.; He, J.; Han, B.; Yamauchi, Y."
"Guo, X., Hao, A.H., Li, S., Li, X.Y., Wan, X., Liu, X.F., Shui, J.L.",Selective Hydrogen Oxidation Catalyst for PEM Fuel Cells: Tungsten Cluster-Tuned Platinum Single Atoms,2025,SMALL,21,3,,,,8,8,10.1002/smll.202410101,,"[Guo, Xu; Hao, Ahui; Li, Shuang; Wan, Xin; Liu, Xiaofang; Shui, Jianglan] Beihang Univ, Sch Mat Sci & Engn, 37 Xueyuan Rd, Beijing 100191, Peoples R China; [Guo, Xu; Hao, Ahui; Li, Shuang; Shui, Jianglan] Tianmushan Lab, Hangzhou 310023, Peoples R China; [Li, Xiangyan] Beijing Univ Chem Technol, Coll Mat Sci & Engn, 15 North Third Ring East Rd, Beijing 100029, Peoples R China",,"The selective hydrogen oxidation reaction (HOR) electrocatalyst is crucial for enhancing the performance of proton-exchange membrane fuel cells (PEMFCs) against degradation caused by reverse currents. In this study, a catalyst comprising platinum single atoms (Pt1) finely tuned by tungsten nanoclusters (WNC) on an accordion-like nitrogen-doped carbon support (ANC) is presented. The tungsten nanoclusters, derived from phosphotungstic acid, are embedded within the carbon support, while the Pt single atoms are uniformly dispersed on its surface. Experimental results and theoretical calculations reveal that the WNC effectively reduce the hydrogen adsorption strength on Pt1 to an optimal level, thereby facilitating HOR catalysis. Notably, this adjustment also weakens oxygen adsorption, rendering Pt1 less effective for catalyzing the oxygen reduction reaction. Consequently, the catalyst Pt1/WNC-ANC exhibits high resistance to degradation from reverse currents when oxygen leaks into the anode. Meanwhile, it demonstrates an ultralow HOR overpotential with an outstanding mass activity, 13 times greater than commercial Pt/C. This work provides a highly active and selective low-Pt HOR catalyst, paving the way for the development of cost-effective, long-lasting, and robust PEMFCs.",durability; fuel cell; HOR selectivity; Pt single atom catalyst; W nanocluster,SUPPORT MATERIALS; DURABILITY; SITES,durability;fuel cell;HOR selectivity;Pt single atom catalyst;W nanocluster;SUPPORT MATERIALS;SITES,shuijianglan@buaa.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1613-6810,,,39578245,English,SMALL,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:001360827600001,2-s2.0-85215509197,China,buaa.edu.cn,Beihang Univ;Tianmushan Lab;Beijing Univ Chem Technol,"Beihang Univ, China;Tianmushan Lab, China;Beijing Univ Chem Technol, China","Guo, Xu; Hao, Ahui; Li, Shuang; Li, Xiangyan; Wan, Xin; Liu, Xiaofang; Shui, Jianglan"
"Luo, X., Nie, J.B., Liang, H., Li, Y.Y., Wang, Y.H., Que, Q.K., Dodelet, J.P., Wang, Y.",Selective synthesis of dense high-spin D1 active sites via engineered less-graphitized carbon environments,2025,Energy and Environmental Science,18,14,,7245,7253,,3,10.1039/d5ee00141b,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105009029695&doi=10.1039%2Fd5ee00141b&partnerID=40&md5=d9f1e3863b75a7a42fdb72196efe5c1f,"College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China; GRINM (Guangdong) Institute for Advanced Materials and Technology, Foshan, Guangdong 528051, China; Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen, Fujian, China; Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada","Luo, Xuan, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China; Nie, Jiabao, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China; Liang, Huang, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China; Li, Yuyang, GRINM (Guangdong) Institute for Advanced Materials and Technology, Foshan, Guangdong 528051, China; Wang, Youheng, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China; Que, Qikang, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen, Fujian, China; Dodelet, Jean Pol, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Wang, Yucheng, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen, Fujian, China","Fe-N-C catalysts are the most promising alternative to Pt for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). However, the mixture of two distinct active sites—highly active but unstable D1 and less active but more stable D2—has complicated the study of site-specific catalytic behaviors. Here we report a synthetic procedure to maximize the D1 site by introducing ascorbic acid (AA) as a perturbing molecule. The AA not only increases the single-atom loading, but also creates a less-graphitized carbon environment, featuring increased carbon defects and mesoporosity, which favors D1 site formation. This resulting catalyst exhibits over 80% D1 site and a substantially high D1 concentration of 2.13 wt%. The denser D1 sites, as well as the increased mesoporosity, enables a current density of 151 mA cm−2 at 0.8 V and a peak power density of 803 mW cm−2 at 1.5 bar air. Meanwhile, the catalyst loses 93% of its initial power within 50 hours. Both the activity and stability behaviors meet the characteristics of the D1 site. The study paves the way for the precise exploration of the D1 active site, not only for the ORR but also potentially for other catalytic processes. © 2025 The Royal Society of Chemistry.",,Ascorbic acid; Carbon; Catalyst activity; Electrolytic reduction; Graphitization; Iron compounds; Oxygen reduction reaction; Active site; Distinct active sites; Graphitized carbons; High spins; Mesoporosity; Proton-exchange membranes fuel cells; Selective synthesis; Site-specific; ]+ catalyst; Proton exchange membrane fuel cells (PEMFC); ascorbic acid; catalyst; concentration (composition); fuel cell; porosity; reaction kinetics; reduction,Ascorbic acid;Carbon;Catalyst activity;Electrolytic reduction;Graphitization;Iron compounds;Oxygen reduction reaction;Active site;Distinct active sites;Graphitized carbons;High spins;Mesoporosity;Proton-exchange membranes fuel cells;Selective synthesis;Site-specific;]+ catalyst;Proton exchange membrane fuel cells (PEMFC);catalyst;concentration (composition);fuel cell;porosity;reaction kinetics;reduction,"J.-P. Dodelet; INRS-Énergie, Matériaux et Télécommunications, Varennes, J3X1P7, Canada; email: Jean-Pol.Dodelet@inrs.ca; Y.-C. Wang; State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China; email: wangyc@xmu.edu.cn",,,,,,Royal Society of Chemistry,17545692,,,,English,Energy Environ. Sci.,Article,Scopus,,2-s2.0-105009029695,,China;Canada,inrs.ca,,,"Luo, X.; Nie, J.-B.; Liang, H.; Li, Y.-Y.; Wang, Y.-H.; Que, Q.-K.; Dodelet, J.-P.; Wang, Y."
"Jiao, L., Arman, T.A., Hwang, S., Fonseca, J., Okolie, N., Shaaban, E., Li, G.H., Liu, E.R., Pasaogullari, U., Babu, S.K., Mukerjee, S., Spendelow, J.S., Cullen, D.A., Jaouen, F., Jia, Q.Y.",Self-Sacrificial Template Synthesis of Fe-N-C Catalysts with Dense Active Sites Deposited on A Porous Carbon Network for High Performance in PEMFC,2024,ADVANCED ENERGY MATERIALS,14,20,,,,10,33,10.1002/aenm.202303952,,"[Jiao, Li; Fonseca, Javier] Northeastern Univ, Dept Chem Engn, Boston, MA 02115 USA; [Jiao, Li; Jaouen, Frederic] Univ Montpellier, CNRS, ICGM, ENSCM, F-34293 Montpellier, France; [Arman, Tanvir Alam; Babu, Siddharth Komini; Spendelow, Jacob Schatz] Los Alamos Natl Lab, Mat Phys & Applicat, Los Alamos, NM 87545 USA; [Hwang, Sooyeon] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA; [Okolie, Norbert; Shaaban, Ehab; Li, Gonghu] Univ New Hampshire, Dept Chem, Durham, NH 03857 USA; [Liu, Ershuai; Mukerjee, Sanjeev; Jia, Qingying] Northeastern Univ, Dept Chem & Chem Biol, Boston, MA 02115 USA; [Pasaogullari, Ugur] Univ Connecticut, Dept Mech Engn, Storrs, CT 06269 USA; [Cullen, David A.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA",,"Iron-nitrogen-carbon (Fe-N-C) single-atom catalysts are promising sustainable alternatives to the costly and scarce platinum (Pt) to catalyze the oxygen reduction reactions (ORR) at the cathode of proton exchange membrane fuel cells (PEMFCs). However, Fe-N-C cathodes for PEMFC are made thicker than Pt/C ones, in order to compensate for the lower intrinsic ORR activity and site density of Fe-N-C materials. The thick electrodes are bound with mass transport issues that limit their performance at high current densities, especially in H2/air PEMFCs. Practical Fe-N-C electrodes must combine high intrinsic ORR activity, high site density, and fast mass transport. Herein, it has achieved an improved combination of these properties with a Fe-N-C catalyst prepared via a two-step synthesis approach, constructing first a porous zinc-nitrogen-carbon (Zn-N-C) substrate, followed by transmetallating Zn by Fe via chemical vapor deposition. A cathode comprising this Fe-N-C catalyst has exhibited a maximum power density of 0.53 W cm-2 in H2/air PEMFC at 80 degrees C. The improved power density is associated with the hierarchical porosity of the Zn-N-C substrate of this work, which is achieved by epitaxial growth of ZIF-8 onto g-C3N4, leading to a micro-mesoporous substrate. A Fe-N-C catalyst with a porous network structure integrated with high active site density is constructed via iron deposition on a porous Zn-N-C substrate. The Zn-N-C substrate derived from the epitaxial growth of ZIF-8s onto g-C3N4 consequently imparts excellent mass transport through the resulting Fe-N-C catalyst layer. A cathode comprising this Fe-N-C catalyst has exhibited a maximum power density of 0.53 W cm-2 in H2/air PEMFC at 80 degrees C. image",chemical vapor deposition; Fe-N-C; oxygen reduction reaction; proton exchange membrane fuel cells,OXYGEN REDUCTION; RELATIVE-HUMIDITY; MESOPOROUS SOLIDS; IRON; ELECTRODES; IONOMER; ORR,chemical vapor deposition;Fe-N-C;oxygen reduction reaction;proton exchange membrane fuel cells;OXYGEN REDUCTION;RELATIVE-HUMIDITY;MESOPOROUS SOLIDS;IRON;ELECTRODES;IONOMER;ORR,cullenda@ornl.gov; frederic.jaouen@umontpellier.fr; qjia@hawk.iit.edu,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1614-6832,,,,English,ADV ENERGY MATER,Article,WoS,Chemistry; Energy & Fuels; Materials Science; Physics,WOS:001203189000001,2-s2.0-85190433987,United States;France,ornl.gov,Northeastern Univ;Univ Montpellier;Los Alamos Natl Lab;Brookhaven Natl Lab;Univ New Hampshire;Univ Connecticut;Oak Ridge Natl Lab,"Northeastern Univ, United States;Univ Montpellier, France;Los Alamos Natl Lab, United States;Brookhaven Natl Lab, United States;Univ New Hampshire, United States;Univ Connecticut, United States;Oak Ridge Natl Lab, United States","Jiao, Li; Arman, Tanvir Alam; Hwang, Sooyeon; Fonseca, Javier; Okolie, Norbert; Shaaban, Ehab; Li, Gonghu; Liu, Ershuai; Pasaogullari, Ugur; Babu, Siddharth Komini; Mukerjee, Sanjeev; Spendelow, Jacob Schatz; Cullen, David A.; Jaouen, Frederic; Jia, Qingying"
"Cao, X., Li, J., Dong, X., Song, R., Zhou, X., Wang, X., Yuan, N., Ding, J.",Self-template synthesized 2D porous carbon with FeA@Fe-N-C sites as oxygen electrocatalysts for Zn-Air and membraneless methanol fuel cells,2022,Journal of Alloys and Compounds,928,,166932,,,,10,10.1016/j.jallcom.2022.166932,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85138206474&doi=10.1016%2Fj.jallcom.2022.166932&partnerID=40&md5=ee7430983af6f4d5b8f17bd55dd7dd9a,"School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, China; Yangzhou University, Yangzhou, Jiangsu, China","Cao, Xiaoting, School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, China; Li, Jiangnan, School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, China; Dong, Xu, School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, China; Song, Ruili, School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, China; Zhou, Xiaoshuang, School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, China; Wang, Xi, School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, China; Yuan, Ningyi, School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, China; Ding, Jianning, School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, China, Yangzhou University, Yangzhou, Jiangsu, China","The development of low-cost, high-performance, highly stable and methanol-resistant oxygen reduction (ORR) electrocatalysts is vital for zinc-air batteries (ZAB) and membraneless direct methanol fuel cells (ML-DMFC). In this study, 2D porous materials (L-Fe<inf>A</inf>@Fe-NC-1 h) were prepared by consuming self-templates to regulate the active sites of the catalysts in a simple manner. In the L-5%-Fe<inf>A</inf>@Fe-NC-1 h structure, the austenitic Fe (Fe<inf>A</inf>) particles (15 nm) were wrapped by Fe and N co-doped carbon nanosheets. The L-5%-Fe<inf>A</inf>@Fe-NC-1 h material exhibited excellent ORR performance in alkaline electrolytes. The L-5%-Fe<inf>A</inf>@Fe-NC-1 h catalyst exhibited outstanding stability and resistance to methanol. Furthermore, the ZAB with L-5%-Fe<inf>A</inf>@Fe-NC-1 h as the ORR electrocatalyst exhibited outstanding power density and long-term operational stability. The L-5%-Fe<inf>A</inf>@Fe-NC-1 h can be practically applied as a cathode catalyst of ML-DMFC with considerable power density. Therefore, this work provides a simple and reliable control scheme to obtain the optimal catalyst and provides an easy method for the preparation of ORR catalysts with low cost and high quality and stability. © 2022 Elsevier B.V.",Austenitic Fe; FeA@Fe-NC; Fuel cell; ORR electrocatalyst; Zn-Air battery,Austenite; Carbon; Catalyst activity; Costs; Direct methanol fuel cells (DMFC); Electrocatalysts; Electrolytic reduction; Methanol fuels; Oxygen; Porous materials; Proton exchange membrane fuel cells (PEMFC); Zinc air batteries; Austenitic; Austenitic fe; Direct-methanol fuel cells; FeA@fe-NC; Low-costs; Membraneless; ORR electrocatalysts; Performance; Zinc-air battery; ]+ catalyst; Methanol,Austenitic Fe;FeA@Fe-NC;Fuel cell;ORR electrocatalyst;Zn-Air battery;Austenite;Carbon;Catalyst activity;Costs;Direct methanol fuel cells (DMFC);Electrocatalysts;Electrolytic reduction;Methanol fuels;Oxygen;Porous materials;Proton exchange membrane fuel cells (PEMFC);Zinc air batteries;Austenitic;Direct-methanol fuel cells;Low-costs;Membraneless;ORR electrocatalysts;Performance;Zinc-air battery;]+ catalyst;Methanol,"N. Yuan; Jiangsu Collaborative Innovation Center for Photovoltaic Science and Engineering, Jiangsu Province Cultivation base for State Key Laboratory of Photovoltaic Science and Technology, School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, 213164, China; email: nyyuan@cczu.edu.cn; J. Ding; Jiangsu Collaborative Innovation Center for Photovoltaic Science and Engineering, Jiangsu Province Cultivation base for State Key Laboratory of Photovoltaic Science and Technology, School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, 213164, China; email: dingjn@yzu.edu.cn",,,,,,Elsevier Ltd,09258388,,JALCE,,English,J Alloys Compd,Article,Scopus,,2-s2.0-85138206474,,China,cczu.edu.cn,,,"Cao, X.; Li, J.; Dong, X.; Song, R.; Zhou, X.; Wang, X.; Yuan, N.; Ding, J."
"Liu, Q.T., Li, Y.C., Zheng, L.R., Shang, J.X., Liu, X.F., Yu, R.H., Shui, J.L.",Sequential Synthesis and Active-Site Coordination Principle of Precious Metal Single-Atom Catalysts for Oxygen Reduction Reaction and PEM Fuel Cells,2020,ADVANCED ENERGY MATERIALS,10,20,2000689,,,8,140,10.1002/aenm.202000689,,"[Liu, Qingtao; Li, Yongcheng; Shang, Jiaxiang; Liu, Xiaofang; Yu, Ronghai; Shui, Jianglan] Beihang Univ, Sch Mat Sci & Engn, 37 Xueyuan Rd, Beijing 100191, Peoples R China; [Zheng, Lirong] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, 19 Yuquan Rd, Beijing 100049, Peoples R China",,"Carbon-supported precious metal single-atom catalysts (PM SACs) have shown promising application in proton exchange membrane fuel cells (PEMFCs). However, the coordination principle of the active site, consisting of one PM atom and several coordinating anions, is still unclear for PM SACs. Here, a sequential coordination method is developed to dope a large amount of PM atoms (Ir, Rh, Pt and Pd) into a zeolite imidazolate framework (ZIF), which are further pyrolyzed into nitrogen-coordinated PM SACs. The PM loadings are as high as 1.2-4.5 wt%, achieving the highest PM loadings in ZIF-derived SACs to date. In the acidic half-cell, Ir-1-N/C and Rh-1-N/C exhibit much higher oxygen reduction reaction (ORR) activities than nanoparticle catalysts Ir/C and Rh/C. In the contrast, the activities of Pd-1-N/C and Pt-1-N/C are considerably lower than Pd/C and Pt/C. Density function theory (DFT) calculations reveal that the ORR activity of PM SAC depends on the match between the OH* adsorption on PM and the electronegativity of coordinating anions, and the stronger OH* adsorption is, the higher electronegativity is needed for the coordinating anions. PEMFC tests confirm the active-site coordination principle and show the extremely high atomic efficiency of Ir-1-N/C. The revealed principle provides guidance for designing future PM SACs for PEMFCs.",fuel cells; oxygen reduction reaction; single-atom catalysts; zeolite imidazolate frameworks,SOLID-PHASE SYNTHESIS; N-C ELECTROCATALYST; SUPPORT INTERACTIONS; NITROGEN; CARBON; GRAPHENE,fuel cells;oxygen reduction reaction;single-atom catalysts;zeolite imidazolate frameworks;SOLID-PHASE SYNTHESIS;N-C ELECTROCATALYST;SUPPORT INTERACTIONS;NITROGEN;CARBON;GRAPHENE,shuijianglan@buaa.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1614-6832,,,,English,ADV ENERGY MATER,Article,WoS,Chemistry; Energy & Fuels; Materials Science; Physics,WOS:000528708500001,2-s2.0-85083066850,China,buaa.edu.cn,Beihang Univ;Chinese Acad Sci,"Beihang Univ, China;Chinese Acad Sci, China","Liu, Qingtao; Li, Yongcheng; Zheng, Lirong; Shang, Jiaxiang; Liu, Xiaofang; Yu, Ronghai; Shui, Jianglan"
"Ding, W., Li, L., Xiong, K., Wang, Y., Li, W., Nie, Y., Chen, S., Qi, X., Wei, Z.",Shape fixing via salt recrystallization: A morphology-controlled approach to convert nanostructured polymer to carbon nanomaterial as a highly active catalyst for oxygen reduction reaction,2015,Journal of the American Chemical Society,137,16,,5414,5420,,373,10.1021/jacs.5b00292,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84928721617&doi=10.1021%2Fjacs.5b00292&partnerID=40&md5=c50d173b090ef06c343e830fe8317dcc,"Chongqing University, Chongqing, China","Ding, Wei, Chongqing University, Chongqing, China; Li, Li, Chongqing University, Chongqing, China; Xiong, Kun, Chongqing University, Chongqing, China; Wang, Yao, Chongqing University, Chongqing, China; Li, Wei, Chongqing University, Chongqing, China; Nie, Yao, Chongqing University, Chongqing, China; Chen, Siguo, Chongqing University, Chongqing, China; Qi, Xueqiang, Chongqing University, Chongqing, China; Wei, Zidong, Chongqing University, Chongqing, China","Herein, we report a ""shape fixing via salt recrystallization"" method to efficiently synthesize nitrogen-doped carbon material with a large number of active sites exposed to the three-phase zones, for use as an ORR catalyst. Self-assembled polyaniline with a 3D network structure was fixed and fully sealed inside NaCl via recrystallization of NaCl solution. During pyrolysis, the NaCl crystal functions as a fully sealed nanoreactor, which facilitates nitrogen incorporation and graphitization. The gasification in such a closed nanoreactor creates a large number of pores in the resultant samples. The 3D network structure, which is conducive to mass transport and high utilization of active sites, was found to have been accurately transferred to the final N-doped carbon materials, after dissolution of the NaCl. Use of the invented cathode catalyst in a proton exchange membrane fuel cell produces a peak power of 600 mW cm-2, making this among the best nonprecious metal catalysts for the ORR reported so far. Furthermore, N-doped carbon materials with a nanotube or nanoshell morphology can be realized by the invented method. © 2015 American Chemical Society.",,Carbon; Catalysts; Doping (additives); Electrolytic reduction; Fuel cells; Morphology; Nanoreactors; Nanostructured materials; Nitrogen; Polyaniline; Proton exchange membrane fuel cells (PEMFC); Recrystallization (metallurgy); Yarn; 3D-network structures; Morphology-controlled; Nanostructured polymers; Nitrogen incorporation; Nitrogen-doped carbons; Non-precious metal catalysts; Number of active sites; Oxygen reduction reaction; Catalyst activity; carbon nanotube; graphite; nanoshell; nitrogen; oxygen; polyaniline; proton; sodium chloride; Article; catalyst; controlled study; crystallization; dissolution; membrane; morphology; nanocatalyst; oxidation reduction reaction; particle size; pyrolysis,Carbon;Catalysts;Doping (additives);Electrolytic reduction;Fuel cells;Morphology;Nanoreactors;Nanostructured materials;Nitrogen;Polyaniline;Proton exchange membrane fuel cells (PEMFC);Recrystallization (metallurgy);Yarn;3D-network structures;Morphology-controlled;Nanostructured polymers;Nitrogen incorporation;Nitrogen-doped carbons;Non-precious metal catalysts;Number of active sites;Oxygen reduction reaction;Catalyst activity;carbon nanotube;graphite;nanoshell;oxygen;proton;sodium chloride;Article;catalyst;controlled study;crystallization;dissolution;membrane;nanocatalyst;oxidation reduction reaction;particle size;pyrolysis,,,,,,,American Chemical Society service@acs.org,00027863,,JACSA,,English,J. Am. Chem. Soc.,Article,Scopus,,2-s2.0-84928721617,,China,No email,,,"Ding, W.; Li, L.; Xiong, K.; Wang, Y.; Li, W.; Nie, Y.; Chen, S.; Qi, X.; Wei, Z."
"Lan, C., Bai, J., Guan, X., Wang, S., Zhang, N.S., Cheng, Y., Tao, J., Chu, Y., Xiao, M., Liu, C., Xing, W.",Significantly Enhanced Oxygen Reduction Reaction Activity in Co-N-C Catalysts through Synergistic Boron Doping; 协同硼掺杂显著提升 Co-N-C 催化剂的氧还原反应活性,2025,Journal of Electrochemistry,31,9,,1,13,,0,10.61558/2993-074X.3577,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105024598999&doi=10.61558%2F2993-074X.3577&partnerID=40&md5=cd1fcb0cb871b1373d76cab9747dae9b,"Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Jilin Province Key Laboratory of Low Carbon Chemical Power Sources, Changchun, Jilin, China; State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China","Lan, Chang, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China, Jilin Province Key Laboratory of Low Carbon Chemical Power Sources, Changchun, Jilin, China, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Bai, Jingsen, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China, Jilin Province Key Laboratory of Low Carbon Chemical Power Sources, Changchun, Jilin, China, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Guan, Xin, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China, Jilin Province Key Laboratory of Low Carbon Chemical Power Sources, Changchun, Jilin, China, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Wang, Shuo, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China, Jilin Province Key Laboratory of Low Carbon Chemical Power Sources, Changchun, Jilin, China, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Zhang, Nanshu, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China, Jilin Province Key Laboratory of Low Carbon Chemical Power Sources, Changchun, Jilin, China, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Cheng, Yuqing, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China, Jilin Province Key Laboratory of Low Carbon Chemical Power Sources, Changchun, Jilin, China, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Tao, Jinjing, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China, Jilin Province Key Laboratory of Low Carbon Chemical Power Sources, Changchun, Jilin, China, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Chu, Yuyi, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China, Jilin Province Key Laboratory of Low Carbon Chemical Power Sources, Changchun, Jilin, China, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Xiao, Meiling, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China, Jilin Province Key Laboratory of Low Carbon Chemical Power Sources, Changchun, Jilin, China, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Liu, Changpeng, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China, Jilin Province Key Laboratory of Low Carbon Chemical Power Sources, Changchun, Jilin, China, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Xing, Wei, Laboratory of Advanced Power Sources, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China, Jilin Province Key Laboratory of Low Carbon Chemical Power Sources, Changchun, Jilin, China, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China","The weak adsorption energy of oxygen-containing intermediates on Co center leads to a considerable performance disparity between Co-N-C and costly Pt benchmark in catalyzing oxygen reduction reaction (ORR). In this work, we strategically engineer the active site structure of Co-N-C via B substitution, which is accomplished by the pyrolysis of ammonium borate. During this process, the in-situ generated NH <inf>3</inf> gas plays a critical role in creating surface defects and boron atoms substituting nitrogen atoms in the carbon structure. The well-designed CoB<inf>1</inf>N<inf>3</inf> active site endows Co with higher charge density and stronger adsorption energy toward oxygen species, potentially accelerating ORR kinetics. As expected, the resulting Co-B/N-C catalyst exhibited superior ORR performance over Co-N-C counterpart, with 40 mV, and fivefold enhancement in half-wave potential and turnover frequency (TOF). More importantly, the excellent ORR performance could be translated into membrane electrode assembly (MEA) in a fuel cell test, delivering an impressive peak power density of 824 mW·cm–2, which is currently the best among Co-based catalysts under the same conditions. This work not only demonstrates an effective method for designing advanced catalysts, but also affords a highly promising non-precious metal ORR electrocatalyst for fuel cell applications. © 2025 Xiamen University and Chinese Chemical Society.",Boron doping; Co-N-C; Co-N-C; Oxygen reduction reaction; Proton exchange membrane fuel cell; Single-atom catalyst; 单原子催化剂; 氧还原反应; 硼掺杂; 质子交换膜燃料电池,,Boron doping;Co-N-C;Oxygen reduction reaction;Proton exchange membrane fuel cell;Single-atom catalyst;单原子催化剂;氧还原反应;硼掺杂;质子交换膜燃料电池,"M.-L. Xiao; Laboratory of Advanced Power Source, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: mlxiao@ciac.ac.cn; C.-P. Liu; Laboratory of Advanced Power Source, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: liuchp@ciac.ac.cn; W. Xing; Laboratory of Advanced Power Source, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: xingwei@ciac.ac.cn",,,,,,Chinese Chemical Society,10063471,,,,English,J. Electrochem.,Article,Scopus,,2-s2.0-105024598999,,China,ciac.ac.cn,,,"Lan, C.; Bai, J.; Guan, X.; Wang, S.; Zhang, N.-S.; Cheng, Y.; Tao, J.; Chu, Y.; Xiao, M.; Liu, C.; Xing, W."
"Arunchander, A., Peera, S.G., Panda, S.K., Chellammal, S., Sahu, A.K.","Simultaneous co-doping of N and S by a facile in-situ polymerization of 6-N,N-dibutylamine-1,3,5-triazine-2,4-dithiol on graphene framework: An efficient and durable oxygen reduction catalyst in alkaline medium",2017,Carbon,118,,,531,544,,41,10.1016/j.carbon.2017.03.093,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85016744112&doi=10.1016%2Fj.carbon.2017.03.093&partnerID=40&md5=7d7e958101a1bd4558ffe2a3f7c57959,"Central Electrochemical Research Institute India, Karaikudi, TN, India; Central Electrochemical Research Institute India, Karaikudi, TN, India","Arunchander, Asokan, Central Electrochemical Research Institute India, Karaikudi, TN, India; Peera, Shaik Gouse, Central Electrochemical Research Institute India, Karaikudi, TN, India; Panda, Subhendu K., Central Electrochemical Research Institute India, Karaikudi, TN, India; Chellammal, Subbiah, Central Electrochemical Research Institute India, Karaikudi, TN, India; Sahu, Akhila Kumar, Central Electrochemical Research Institute India, Karaikudi, TN, India","Development of an efficient, nonprecious, and durable oxygen reduction catalyst to replace high-cost Pt-based catalysts is one of the critical challenges in polymer electrolyte membrane fuel cells. In the present study, we report a novel chemical method for the simultaneous doping of nitrogen and sulfur by in-situ polymerization of 6-N,N-dibutylamine-1,3,5-triazine-2,4-dithiol on a graphene framework. The composites are subjected to annealing at temperature between 900 °C and 1100 °C to form N-S/Gr catalysts. N-S/Gr-1000 catalyst exhibits an enhanced oxygen reduction reaction (ORR) activity dominated through 4e− pathway compared to other catalysts. The excellent durability of N-S/Gr-1000 catalyst with only a 20-mV negative shift in its half-wave potential after 10,000 repeated cycling contributes to the enhanced ORR. Although a larger shift in onset and half-wave potentials is observed for commercial Pt/C from the initial cycle, the linear sweep voltammogram recorded after 5000 cycles shows poor ORR kinetics with several redox steps. The potential of N-S/Gr-1000 catalyst as a cathode catalyst was validated in a membrane electrode assembly and in a real anion-exchange membrane fuel cell (AEMFC). A peak power density of ∼20 mW cm−2 was achieved under ambient temperature and pressure, which makes N-S/Gr-1000 a promising alternative nonprecious metal catalyst in AEMFCs. © 2017 Elsevier Ltd",,Alkaline fuel cells; Alkalinity; Electrodes; Electrolytes; Electrolytic reduction; Fuel cells; Graphene; Ion exchange membranes; Oxygen; Platinum; Platinum alloys; Polyelectrolytes; Polymerization; Proton exchange membrane fuel cells (PEMFC); Anion-exchange membrane fuel cells; In-situ polymerization; Linear sweep voltammograms; Membrane electrode assemblies; Non-precious metal catalysts; Oxygen reduction catalysts; Oxygen reduction reaction; Temperature and pressures; Catalysts,Alkaline fuel cells;Alkalinity;Electrodes;Electrolytes;Electrolytic reduction;Fuel cells;Graphene;Ion exchange membranes;Oxygen;Platinum;Platinum alloys;Polyelectrolytes;Polymerization;Proton exchange membrane fuel cells (PEMFC);Anion-exchange membrane fuel cells;In-situ polymerization;Linear sweep voltammograms;Membrane electrode assemblies;Non-precious metal catalysts;Oxygen reduction catalysts;Oxygen reduction reaction;Temperature and pressures;Catalysts,"A.K. Sahu; CSIR-Central Electrochemical Research Institute-Madras Unit, CSIR Madras Complex, Chennai, Taramani, 600 113, India; email: aksahu@cecri.res.in",,,,,,Elsevier Ltd,00086223,,CRBNA,,English,Carbon,Article,Scopus,,2-s2.0-85016744112,,India,cecri.res.in,,,"Arunchander, A.; Peera, S.G.; Panda, S.K.; Chellammal, S.; Sahu, A.K."
"Wu, J., Gong, M.J., Zhang, W.Y., Mehmood, A., Zhang, J.F., Ali, G., Kucernak, A.",Simultaneously Incorporating Atomically Dispersed Co-Nx Sites with Graphitic Carbon Layer-Wrapped Co9S8 Nanoparticles for Oxygen Reduction in Acidic Electrolyte,2023,CHEMELECTROCHEM,10,12,,,,9,4,10.1002/celc.202300110,,"[Wu, Jun; Gong, Mengjun; Zhang, Wuyi; Mehmood, Asad; Kucernak, Anthony] Imperial Coll London, Dept Chem, White City Campus, London W12 0BZ, England; [Mehmood, Asad] Bundesanstalt Mat Forsch & Prufung BAM, Div Electrochem Energy Mat 3 6, D-12203 Berlin, Germany; [Zhang, Jinfeng] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China; [Ali, Ghulam] Natl Univ Sci & Technol NUST, US Pakistan Ctr Adv Studies Energy USPCASE Pakista, H-12, Islamabad 44000, Pakistan",,"A facile yet robust synthesis is reported herein to simultaneously incorporate atomically dispersed Co-N-x sites with graphitic layer-protected Co9S8 nanoparticles (denoted as Co SACs+Co9S8) as an efficient electrocatalyst for oxygen reduction in acidic solution. The Co SACs+Co9S8 catalyst shows low H2O2 selectivity (similar to 5 %) with high half-wave potential (E-1/2) of similar to 0.78 V-RHE in 0.5 M H2SO4. The atomic sites of the catalyst were quantified by a nitrite stripping method and the corresponding site density of the catalyst is calculated to be 3.2x10(18) sites g(-1). Besides, we also found the presence of a reasonable amount of Co9S8 nanoparticles is beneficial for the oxygen electrocatalysis. Finally, the catalyst was assembled into a membrane electrode assembly (MEA) for evaluating its performance under more practical conditions in proton exchange membrane fuel cell (PEMFC) system.",Heteroatom Doping; Electrocatalysis; Fuel Cells; Oxygen Reduction; Single Atom Catalysts,PROTON-EXCHANGE MEMBRANE; IRON SITES; CATALYSTS; PERFORMANCE; ELECTROCATALYSTS; SPECTROSCOPY; DEGRADATION; FRAMEWORKS; STABILITY; EFFICIENT,Heteroatom Doping;Electrocatalysis;Fuel Cells;Oxygen Reduction;Single Atom Catalysts;PROTON-EXCHANGE MEMBRANE;IRON SITES;CATALYSTS;PERFORMANCE;ELECTROCATALYSTS;SPECTROSCOPY;DEGRADATION;FRAMEWORKS;STABILITY;EFFICIENT,anthony@imperial.ac.uk,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,2196-0216,,,,English,CHEMELECTROCHEM,Article,WoS,Electrochemistry,WOS:000986210600001,2-s2.0-85159119613,United Kingdom;Germany;China;Pakistan,imperial.ac.uk,Imperial Coll London;Bundesanstalt Mat Forsch & Prufung BAM;Tianjin Univ;Natl Univ Sci & Technol NUST,"Imperial Coll London, United Kingdom;Bundesanstalt Mat Forsch & Prufung BAM, Germany;Tianjin Univ, China;Natl Univ Sci & Technol NUST, Pakistan","Wu, Jun; Gong, Mengjun; Zhang, Wuyi; Mehmood, Asad; Zhang, Jinfeng; Ali, Ghulam; Kucernak, Anthony"
"Cheng, X., Wang, Y., Lu, Y., Zheng, L., Sun, S., Li, H., Chen, G., Zhang, J.",Single-atom alloy with Pt-Co dual sites as an efficient electrocatalyst for oxygen reduction reaction,2022,Applied Catalysis B: Environmental,306,,121112,,,,144,10.1016/j.apcatb.2022.121112,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85123688627&doi=10.1016%2Fj.apcatb.2022.121112&partnerID=40&md5=4b5479850457144bdc8214ecedffc8ec,"Beijing Key Laboratory for Green Catalysis and Separation, Beijing University of Technology, Beijing, China; Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, China; Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China; Institute for Sustainable Energy, Shanghai University College of Sciences, Shanghai, China","Cheng, Xing, Beijing Key Laboratory for Green Catalysis and Separation, Beijing University of Technology, Beijing, China; Wang, Yueshuai, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, China; Lu, Yue, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, China; Zheng, Lirong, Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China; Sun, Shaorui, Beijing Key Laboratory for Green Catalysis and Separation, Beijing University of Technology, Beijing, China; Li, Hongyi, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, China; Chen, Ge, Beijing Key Laboratory for Green Catalysis and Separation, Beijing University of Technology, Beijing, China; Zhang, Jiujun, Institute for Sustainable Energy, Shanghai University College of Sciences, Shanghai, China","Reducing the usage of noble metals, such as platinum-based catalysts for oxygen reduction reaction (ORR) is pressingly demanded towards the practical applications of proton-exchange membrane fuel cells. One promising way is to develop Pt single atom catalysts (SACs), which, however, are plagued by their preference toward two-electron ORR pathway as well as stability issue. Herein, a single-atom alloy (SAA) catalyst with platinum-cobalt (Pt-Co) dual sites encapsulated in nitrogen-doped graphitized carbon nanotubes (Pt<inf>1</inf>Co<inf>100</inf>/N-GCNT) consisting of isolated Pt atoms decorated on the surface of Co nanoparticles was reported. Based on complementary spectroscopic characterizations and first-principle calculations, we propose that the unique Pt-Co dual sites in SAA facilitates the adsorption and dissociation of oxygen, particularly for the immobilization of OOH* intermediate and the dissociation of OH* intermediate, and thus result in high-efficiency four-electron ORR pathway. Consequently, the Pt<inf>1</inf>Co<inf>100</inf>/N-GCNT SAA catalyst achieves a mass activity of 0.81 A mg–1<inf>Pt</inf> at 0.90 V (versus the reversible hydrogen electrode) in 0.1 M HClO<inf>4</inf> electrolyte, outperform commercial Pt/C catalyst for 5.4 times. The superior stability of the SAA catalyst was reflected by the results from the 30,000 potential-scanning cycles combined with the post characterization of the catalyst. © 2022 Elsevier B.V.",Electrocatalyst; Operando XAS; Oxygen reduction reaction; Pt-Co dual sites; Single-atom alloy,Atoms; Binary alloys; Catalyst activity; Dissociation; Doping (additives); Electrocatalysts; Electrolytes; Electrolytic reduction; Oxygen; Platinum; Platinum alloys; Proton exchange membrane fuel cells (PEMFC); Alloy catalyst; Dual sites; Electrocatalyst; Operando; Operando XAS; Oxygen reduction reaction; Platinum-cobalt dual site; Platinum/cobalt; Single-atom alloy; Single-atoms; Chlorine compounds,Electrocatalyst;Operando XAS;Oxygen reduction reaction;Pt-Co dual sites;Single-atom alloy;Atoms;Binary alloys;Catalyst activity;Dissociation;Doping (additives);Electrocatalysts;Electrolytes;Electrolytic reduction;Oxygen;Platinum;Platinum alloys;Proton exchange membrane fuel cells (PEMFC);Alloy catalyst;Dual sites;Operando;Platinum-cobalt dual site;Platinum/cobalt;Single-atoms;Chlorine compounds,"H. Li; Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China; email: lhy06@bjut.edu.cn",,,,,,Elsevier B.V.,09263373,,ACBEE,,English,Appl. Catal. B Environ.,Article,Scopus,,2-s2.0-85123688627,,China,bjut.edu.cn,,,"Cheng, X.; Wang, Y.; Lu, Y.; Zheng, L.; Sun, S.; Li, H.; Chen, G.; Zhang, J."
"Luo, Y., Li, K., Chen, Y., Feng, J., Wang, L., Jiang, Y., Li, L., Yu, G., Feng, J.",Single-Atom and Hierarchical-Pore Aerogel Confinement Strategy for Low-Platinum Fuel Cells,2023,Advanced Materials,35,31,2300624,,,,71,10.1002/adma.202300624,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85162220528&doi=10.1002%2Fadma.202300624&partnerID=40&md5=3d97c2e3c5b22e1f4188808d15abde8c,"Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology China, Changsha, Hunan, China; College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, China; College of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan, Hubei, China; Luoqing New Materials Company, Foshan, Guangdong, China","Luo, Yi, Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology China, Changsha, Hunan, China; Li, Ke, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, China; Chen, Yongting, College of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan, Hubei, China; Feng, Junzong, Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology China, Changsha, Hunan, China; Wang, Lukai, Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology China, Changsha, Hunan, China; Jiang, Yonggang, Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology China, Changsha, Hunan, China; Li, Liangjun, Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology China, Changsha, Hunan, China; Yu, Gang, Luoqing New Materials Company, Foshan, Guangdong, China; Feng, Jian, Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology China, Changsha, Hunan, China","Achieving high catalytic performance through the lowest possible content of platinum (Pt) is the key to cost reduction of proton-exchange-membrane fuel cells (PEMFCs). However, lowering the Pt loading in PEMFCs leads to the high mass-transport resistance of oxygen originating from the limited active sites, and causes less stability of the catalysts due to Pt size growth after long-time operation. Herein, Pt–metal/metal–N–C aerogel catalysts are designed that substantially reduce oxygen-related mass transport resistance and have long-term durability. The tailoring of the Fe–N–C aerogel support with hierarchical and interconnecting pores enable a low local oxygen transport resistance (0.18 s cm−1) for PEMFCs with ultralow Pt loading (50 ± 5 µg<inf>Pt</inf> cm−2). Chemical confinement of Fe─N sites ensures high stability of the loaded-Pt both in the processes of synthesis up to 1000 °C and practical application in PEMFCs. The ultralow Pt PEMFC displays a low voltage loss of 8 mV at 0.80 A cm−2 and unchanged electrochemical surface area after 60 000 cycles of accelerated durability testing. The allying of the hierarchical pores, the aerogel, and the single atoms can fully reflect their structural advantages and expand the understanding for the synthesis of advanced fuel cell PEMFCs catalysts. © 2023 Wiley-VCH GmbH.",aerogels; confinement; electrocatalysts; fuel cells; low Pt,Aerogels; Catalyst activity; Chemical stability; Cost reduction; Durability; Electrolytic reduction; Oxygen; Platinum; Proton exchange membrane fuel cells (PEMFC); Confinement; Hierarchical pores; High catalytic performance; Low platinum; Mass-transport resistance; Platinum loadings; Proton-exchange membranes fuel cells; Single-atoms; Ultra-low platinum; ]+ catalyst; Electrocatalysts,aerogels;confinement;electrocatalysts;fuel cells;low Pt;Catalyst activity;Chemical stability;Cost reduction;Durability;Electrolytic reduction;Oxygen;Platinum;Proton exchange membrane fuel cells (PEMFC);Hierarchical pores;High catalytic performance;Low platinum;Mass-transport resistance;Platinum loadings;Proton-exchange membranes fuel cells;Single-atoms;Ultra-low platinum;]+ catalyst,"J. Feng; Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan, 410073, China; email: junzongfeng@nudt.edu.cn; Y. Chen; College of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan, Hubei, 430081, China; email: chenyongting@wust.edu.cn",,,,,,John Wiley and Sons Inc,09359648,,ADVME,37038691,English,Adv Mater,Article,Scopus,,2-s2.0-85162220528,,China,nudt.edu.cn,,,"Luo, Y.; Li, K.; Chen, Y.; Feng, J.; Wang, L.; Jiang, Y.; Li, L.; Yu, G.; Feng, J."
"Kiani, M., Tian, X.Q., Zhang, W.X.","Single atom based electrocatalysts for oxygen reduction reaction in polymer electrolyte membrane fuel cell: Recent advances, challenges and future perspectives",2021,JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS,153,,109989,,,10,18,10.1016/j.jpcs.2021.109989,,"[Kiani, Maryam; Tian, Xiao Qing] Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen, Guangdong, Peoples R China; [Kiani, Maryam; Zhang, Wenxing] Hanshan Normal Univ, Sch Mat Sci & Engn, Chaozhou, Peoples R China",,"Renewable energy is highly fascinating due to the essential power demand, continuous increase in oil costs and environmental concerns. Among the various renewable energy sources, the fuel cell is more appealing because of the higher efficiency and cost-effective power source. The critical problem in the wide-range commercial application of polymer electrolyte membrane fuel cell is the use of platinum dependent electrocatalyst, which is mandatory for the oxygen reduction reaction. The improvement of catalytic activity, stability and low cost are the key issues to be resolved in this developing research area. So, the current review is focused on the advancement in single atom-based electrocatalyst and emphasized the various kinds of single-atom catalysts with improved catalytic performance. Future perspectives and direction are also proposed in this review for the improvement in the design strategy and development of highly efficient electrocatalyst for polymer electrolyte membrane fuel cells.",Fuel cells; Oxygen reduction reaction; Electrocatalysis; Non-precious metal electrocatalyst,NITROGEN-DOPED CARBON; METAL-FREE ELECTROCATALYSTS; FACILE SYNTHESIS; EFFICIENT ELECTROCATALYSTS; CATALYTIC-ACTIVITY; EMBEDDED GRAPHENE; POROUS CARBON; COBALT OXIDE; NANOPARTICLES; NANOCRYSTALS,Fuel cells;Oxygen reduction reaction;Electrocatalysis;Non-precious metal electrocatalyst;NITROGEN-DOPED CARBON;METAL-FREE ELECTROCATALYSTS;FACILE SYNTHESIS;EFFICIENT ELECTROCATALYSTS;CATALYTIC-ACTIVITY;EMBEDDED GRAPHENE;POROUS CARBON;COBALT OXIDE;NANOPARTICLES;NANOCRYSTALS,maryam.kiani@yahoo.com; xqtian@szu.edu.cn,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0022-3697,,,,English,J PHYS CHEM SOLIDS,Review,WoS,Chemistry; Physics,WOS:000634935200004,2-s2.0-85101783719,China,yahoo.com,Shenzhen Univ;Hanshan Normal Univ,"Shenzhen Univ, China;Hanshan Normal Univ, China","Kiani, Maryam; Tian, Xiao Qing; Zhang, Wenxing"
"Yu, J.M., Su, C.L., Shang, L., Zhang, T.R.",Single-Atom-Based Oxygen Reduction Reaction Catalysts for Proton Exchange Membrane Fuel Cells: Progress and Perspective,2023,ACS NANO,17,20,,19514,19525,12,77,10.1021/acsnano.3c06522,,"[Yu, Jianmin; Shang, Lu; Zhang, Tierui] Chinese Acad Sci, Key Lab Photochem Convers & Optoelect Mat, Tech Inst Phys & Chem, Beijing 100190, Peoples R China; [Yu, Jianmin; Su, Chenliang] Shenzhen Univ, Inst Microscale Optoelect, Int Collaborat Lab 2D Mat Optoelect Sci & Technol, Minist Educ, Shen Zhen 518060, Peoples R China; [Zhang, Tierui] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China",,"Single-atom catalysts (SACs) are regarded as promising non-noble-metal alternatives for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells due to their high atom utilization efficiency and excellent catalytic properties. However, the insufficient long-term stability issues of SACs under the working conditions seriously hinder their practical application. In this perspective, the recent progress of SACs with optimized ORR catalytic activity is first reviewed. Then, the possible degradation mechanisms of SACs in the ORR process and effective strategies for improving their ORR durability are summarized. Finally, some challenges and opportunities are proposed to develop stable single-atom-based ORR electrocatalysts in the future.",single-atom catalysts; oxygen reduction reaction; metal-nitrogen-carbonmaterials; stability; proton exchange membrane fuelcells,DEGRADATION; STABILITY; SITES; ELECTROCATALYSTS; DEMETALATION; DURABILITY; EFFICIENT; IMPROVE; ROBUST; ACID,single-atom catalysts;oxygen reduction reaction;metal-nitrogen-carbonmaterials;stability;proton exchange membrane fuelcells;DEGRADATION;SITES;ELECTROCATALYSTS;DEMETALATION;DURABILITY;EFFICIENT;IMPROVE;ROBUST;ACID,lushang@mail.ipc.ac.cn; tierui@mail.ipc.ac.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1936-0851,,,37812403,English,ACS NANO,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science,WOS:001082668800001,2-s2.0-85175269697,China,mail.ipc.ac.cn,Chinese Acad Sci;Shenzhen Univ;Univ Chinese Acad Sci,"Chinese Acad Sci, China;Shenzhen Univ, China;Univ Chinese Acad Sci, China","Yu, Jianmin; Su, Chenliang; Shang, Lu; Zhang, Tierui"
"Zhu, M.Z., Wang, J., Wu, Y.E.",Single-atom Catalysts for Polymer Electrolyte Membrane Fuel Cells,2020,CHEMICAL RESEARCH IN CHINESE UNIVERSITIES,36,3,,320,328,9,11,10.1007/s40242-020-0111-5,,"[Zhu, Mengzhao; Wang, Jing; Wu, Yuen] Univ Sci & Technol China, Dept Chem, iChEM Collaborat Innovat Ctr Chem Energy Mat, Hefei 230026, Peoples R China",,"Searching for high-activity, stability and highly cost-effective electrocatalysts for acid oxygen reaction reduction(ORR) has always been an urgent problem in polymer electrolyte membrane fuel cells(PEMFCs). Nonetheless, the electrochemical properties of various systems have their intrinsic limits and tremendous efforts have been paid out to search for highly efficient electrocatalysts by more rational control over the size, morphology, composition, and structure. In particular, single-atom catalysts(SACs) have attracted extensive interest due to theirs excellent activity, stability, selectivity and the highest metal utilization. In recent years, the number of papers in the field of SACs has increased rapidly, indicating that SACs have made great progress. This review focuses on SACs electrochemical applications in the acid ORR and introduces innovative syntheses, fuel cell performance and long-time durability.",Single-atom catalyst; Oxygen reaction reduction; Polymer electrolyte membrane fuel cell,OXYGEN-REDUCTION REACTION; NITROGEN-DOPED GRAPHENE; N-C ELECTROCATALYST; CATHODE CATALYSTS; TRANSITION-METALS; ACTIVE-SITES; PERFORMANCE; FE; IRON; ORR,Single-atom catalyst;Oxygen reaction reduction;Polymer electrolyte membrane fuel cell;OXYGEN-REDUCTION REACTION;NITROGEN-DOPED GRAPHENE;N-C ELECTROCATALYST;CATHODE CATALYSTS;TRANSITION-METALS;ACTIVE-SITES;PERFORMANCE;FE;IRON;ORR,yuenwu@ustc.edu.cn,,"CHAOYANG DIST, 4, HUIXINDONGJIE, FUSHENG BLDG, BEIJING 100029, PEOPLES R CHINA",,,,HIGHER EDUCATION PRESS,1005-9040,,,,English,CHEM RES CHINESE U,Review,WoS,Chemistry,WOS:000534114800005,2-s2.0-85085964065,China,ustc.edu.cn,Univ Sci & Technol China,"Univ Sci & Technol China, China","Zhu, Mengzhao; Wang, Jing; Wu, Yuen"
"Tang, M.J., Yang, T.T., Yang, X.L., Li, Y., Shi, Z.P., Wang, X., Liu, C.P., Xing, W., Ge, J.J.",Single-atom catalysts for proton exchange membrane fuel cell: Anode anti-poisoning & characterization technology,2023,ELECTROCHIMICA ACTA,446,,142120,,,15,14,10.1016/j.electacta.2023.142120,,"[Tang, Meijian; Yang, Tongtong; Yang, Xiaolong; Li, Yang; Shi, Zhaoping; Wang, Xian; Liu, Changpeng; Xing, Wei; Ge, Junjie] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Jilin Prov Key Lab Low Carbon Chem Power, Changchun 130022, Peoples R China; [Tang, Meijian; Yang, Tongtong; Yang, Xiaolong; Li, Yang; Shi, Zhaoping; Wang, Xian; Liu, Changpeng; Xing, Wei; Ge, Junjie] Univ Sci & Technol China, Sch Appl Chem & Engn, Hefei 230026, Peoples R China; [Ge, Junjie] Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China",,"Commercial Pt/C, as the most widely used anode catalyst in proton exchange membrane fuel cells (PEMFCs), is greatly affected by even trace amounts of CO in hydrogen (< 10 ppm). Metal isolated single atomic catalysts (SACs) exhibit the merit of both homogeneous catalysts in their high metal site usage and the heterogeneous catalysts in their facile recyclability. Despite considerable progress achieved recently, most of the reported SACs suffer from either insufficient activity or unsatisfactory stability, which severely retards their practical application. Therefore, endeavors in exploring efficient and durable catalysts have become the focus of international scientific SACs community, in hoping to promote industrial revolution with their unique adsorption and catalytic behaviors. In this review, we focused on the application of SACs towards CO tolerance in PEMFCs, with the antipoisoning mechanism been especially emphasized and anodic fuels including CO contaminated H2, formic acid, and methanol been discussed.",PEMFC; CO anti -poisoning electrocatalyst; Single atom catalysts; Characterization techniques,OXYGEN REDUCTION REACTION; FORMIC-ACID; HYDROGEN OXIDATION; CO OXIDATION; CARBON-MONOXIDE; METHANOL OXIDATION; PLATINUM; ELECTROOXIDATION; PERFORMANCE; MECHANISMS,PEMFC;CO anti -poisoning electrocatalyst;Single atom catalysts;Characterization techniques;OXYGEN REDUCTION REACTION;FORMIC-ACID;HYDROGEN OXIDATION;CO OXIDATION;CARBON-MONOXIDE;METHANOL OXIDATION;PLATINUM;ELECTROOXIDATION;PERFORMANCE;MECHANISMS,xwang@ciac.ac.cn; xingwei@ciac.ac.cn; gejunjie@ustc.edu.cn,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000965845200001,2-s2.0-85149327274,China,ciac.ac.cn,Chinese Acad Sci;Univ Sci & Technol China;Dalian Natl Lab Clean Energy,"Chinese Acad Sci, China;Univ Sci & Technol China, China;Dalian Natl Lab Clean Energy, China","Tang, Meijian; Yang, Tongtong; Yang, Xiaolong; Li, Yang; Shi, Zhaoping; Wang, Xian; Liu, Changpeng; Xing, Wei; Ge, Junjie"
"Zhu, M.Z., Zhao, C., Liu, X.K., Wang, X.L., Zhou, F.Y., Wang, J., Hu, Y.M., Zhao, Y.F., Yao, T., Yang, L.M., Wu, Y.E.",Single Atomic Cerium Sites with a High Coordination Number for Efficient Oxygen Reduction in Proton-Exchange Membrane Fuel Cells,2021,ACS CATALYSIS,11,7,,3923,3929,7,247,10.1021/acscatal.0c05503,,"[Wang, Xiaolin; Yang, Li-Ming] Huazhong Univ Sci & Technol, Hubei Key Lab Bioinorgan Chem & Mat Med, Wuhan 430074, Peoples R China; [Wang, Xiaolin; Yang, Li-Ming] Huazhong Univ Sci & Technol, Key Lab Mat Chem Energy Convers & Storage, Minist Educ, Wuhan 430074, Peoples R China; [Wang, Xiaolin; Yang, Li-Ming] Huazhong Univ Sci & Technol, Hubei Key Lab Mat Chem & Serv Failure, Wuhan 430074, Peoples R China; [Wang, Xiaolin; Yang, Li-Ming] Huazhong Univ Sci & Technol, Hubei Engn Res Ctr Biomat & Med Protect Mat, Wuhan 430074, Peoples R China; [Wang, Xiaolin; Yang, Li-Ming] Huazhong Univ Sci & Technol, Sch Chem & Chem Engn, Wuhan 430074, Peoples R China; [Zhu, Mengzhao; Zhao, Chao; Zhou, Fangyao; Wang, Jing; Hu, Yanmin; Zhao, Yafei; Wu, Yuen] Univ Sci & Technol China, Dept Hefei Natl Lab Phys Sci Microscale, Collaborat Innovat Ctr Chem Energy Mat iChEM, Sch Chem & Aterials Sci, Hefei 230026, Peoples R China; [Zhu, Mengzhao; Zhao, Chao; Liu, Xiaokang; Zhou, Fangyao; Wang, Jing; Hu, Yanmin; Zhao, Yafei; Yao, Tao; Wu, Yuen] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Peoples R China; [Wu, Yuen] Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China",,"Fe-N-C electrocatalysts, as a representative of platinum group metal-free (PGM-free) catalysts, exhibit a comparable oxygen reduction reaction (ORR) activity but insufficient stability to that of commercial Pt/C in proton-exchange membrane fuel cells (PEMFCs), due to the unavoidable Fenton's reactions. Herein, we report a hard-template approach to synthesize the rare-earth singlecerium-atom-doped metal-organic frameworks with a hierarchically macro-meso-microporous structure. Spherical aberration correction electron microscopy confirms the atomic dispersion of Ce sites. Additionally, X-ray absorption spectroscopy (XAS) was employed to further verify the coordination environment of Ce sites, which were stabilized by four-coordinated nitrogen atoms and six-oxygen atoms (Ce-N-4/O-6). The Ce sites were embedded in a hierarchically macromeso-microporous N-doped carbon (Ce SAS/HPNC) catalyst, which exhibits a half-wave potential of 0.862 V in ORR and the highest power density of 0.525 W cm(-2) under 2.0 bar H-2/O-2 in the fuel cell test.",single-atom catalyst; high coordination number; hierarchically porous structure; oxygen reduction reaction; proton-exchange membrane fuel cell,SOOT OXIDATION; ACTIVE-SITES; CEO2; CATALYSTS; ELECTROCATALYST; CHALLENGES; ANODE,single-atom catalyst;high coordination number;hierarchically porous structure;oxygen reduction reaction;proton-exchange membrane fuel cell;SOOT OXIDATION;ACTIVE-SITES;CEO2;CATALYSTS;ELECTROCATALYST;CHALLENGES;ANODE,Lmyang@hust.edu.cn; yuenwu@ustc.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2155-5435,,,,English,ACS CATAL,Article,WoS,Chemistry,WOS:000637003700014,2-s2.0-85103774079,China,hust.edu.cn,Huazhong Univ Sci & Technol;Univ Sci & Technol China;Dalian Natl Lab Clean Energy,"Huazhong Univ Sci & Technol, China;Univ Sci & Technol China, China;Dalian Natl Lab Clean Energy, China","Zhu, Mengzhao; Zhao, Chao; Liu, Xiaokang; Wang, Xiaolin; Zhou, Fangyao; Wang, Jing; Hu, Yanmin; Zhao, Yafei; Yao, Tao; Yang, Li-Ming; Wu, Yuen"
"Chen, M., Cullen, D.A., Karakalos, S., Lu, X., Cui, J., Kropf, A.J., Mistry, H., He, K., Myers, D.J., Wu, G.",Single Atomic Iron Site Catalysts via Benign Aqueous Synthesis for Durability Improvement in Proton Exchange Membrane Fuel Cells,2021,Journal of the Electrochemical Society,168,4,044501,,,,13,10.1149/1945-7111/abf014,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85104348031&doi=10.1149%2F1945-7111%2Fabf014&partnerID=40&md5=930a8fbc30634cef08992b4437c91d22,"School of Engineering and Applied Sciences, Buffalo, NY, United States; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Molinaroli College of Engineering and Computing, Columbia, SC, United States; Clemson University College of Engineering, Computing and Applied Sciences, Clemson, SC, United States; Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States","Chen, Mengjie, School of Engineering and Applied Sciences, Buffalo, NY, United States; Cullen, David A., Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Karakalos, Stavros G., Molinaroli College of Engineering and Computing, Columbia, SC, United States; Lu, Xiner, Clemson University College of Engineering, Computing and Applied Sciences, Clemson, SC, United States; Cui, Jiang, Clemson University College of Engineering, Computing and Applied Sciences, Clemson, SC, United States; Kropf, Arthur Jeremy, Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Mistry, Hemma, Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; He, Kai, Clemson University College of Engineering, Computing and Applied Sciences, Clemson, SC, United States; Myers, Deborah J., Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Wu, Gang, School of Engineering and Applied Sciences, Buffalo, NY, United States","Atomically-dispersed iron-nitrogen-carbon (Fe-N-C) catalysts have arisen as promising candidates for replacing the costly precious metal catalysts in fuel cells but still face some grand challenges, such as insufficient site density and durability. Herein, we report a self-assembly method in an aqueous solution to develop an atomically-dispersed iron catalyst with high oxygen reduction reaction (ORR) activity and stability in acidic electrolytes. As determined by high-resolution transmission electron microscopy (HR-TEM), X-ray absorption spectroscopy (XAS), and high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), this benign aqueous synthesis strategy facilitates the formation of homogeneous atomic nitrogen-coordinated iron sites embedded in a popcorn-like porous graphitic carbon matrix. These catalyst properties contribute to the improved ORR kinetic current density and mass transport. By controlling synthesis chemistry, the correlation between structure and property is systematically investigated. The iron content is the most critical material property and can regulate site density and graphitic carbon structures in the catalyst, impacting catalytic activity and stability. The enhanced performance and durability were examined in both acidic aqueous electrolytes and membrane electrode assemblies. © 2021 The Electrochemical Society (""ECS""). Published on behalf of ECS by IOP Publishing Limited.",,Carbon; Catalyst activity; Coordination reactions; Durability; Electrolytic reduction; High resolution transmission electron microscopy; Iron; Iron compounds; Iron metallography; Nitrogen; Oxygen reduction reaction; Porous materials; Proton exchange membrane fuel cells (PEMFC); Scanning electron microscopy; Transmissions; X ray absorption spectroscopy; Catalyst properties; Durability improvement; High-angle annular dark fields; Membrane electrode assemblies; Porous graphitic carbon; Precious metal catalysts; Self-assembly method; Structure and properties; Solid electrolytes,Carbon;Catalyst activity;Coordination reactions;Durability;Electrolytic reduction;High resolution transmission electron microscopy;Iron;Iron compounds;Iron metallography;Nitrogen;Oxygen reduction reaction;Porous materials;Proton exchange membrane fuel cells (PEMFC);Scanning electron microscopy;Transmissions;X ray absorption spectroscopy;Catalyst properties;Durability improvement;High-angle annular dark fields;Membrane electrode assemblies;Porous graphitic carbon;Precious metal catalysts;Self-assembly method;Structure and properties;Solid electrolytes,,,,,,,IOP Publishing Ltd,00134651,,JESOA,,English,J Electrochem Soc,Article,Scopus,,2-s2.0-85104348031,,United States,No email,,,"Chen, M.; Cullen, D.A.; Karakalos, S.; Lu, X.; Cui, J.; Kropf, A.J.; Mistry, H.; He, K.; Myers, D.J.; Wu, G."
"Razmjooei, F., Yu, J.H., Lee, H.Y., Lee, B.J., Singh, K.P., Kang, T.H., Kim, H.J., Yu, J.S.",Single-Atom Iron-Based Electrocatalysts for High-Temperature Polymer Electrolyte Membrane Fuel Cell: Organometallic Precursor and Pore Texture Tailoring,2020,ACS APPLIED ENERGY MATERIALS,3,11,,11164,11176,13,26,10.1021/acsaem.0c02111,,"[Razmjooei, Fatemeh; Yu, Jeong-Hoon; Lee, Ha-Young; Lee, Byong-June; Singh, Kiran Pal; Kang, Tong-Hyun; Yu, Jong-Sung] Daegu Gyeongbuk Inst Sci & Technol DGIST, Dept Energy Sci & Engn, Daegu 42988, South Korea; [Razmjooei, Fatemeh] German Aerosp Ctr DLR, Inst Engn Thermodynam, HTSP, D-70569 Stuttgart, Germany; [Kim, Hyoung-Juhn] KIST, Ctr Hydrogen & Fuel Cell Res, Seoul 02792, South Korea; [Yu, Jong-Sung] Natl Taiwan Univ Sci & Technol, Dept Mat Sci & Engn, Taipei 10607, Taiwan",,"The oxygen reduction reaction (ORR) activity of platinum (Pt)-based catalyst is not satisfactory in high-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) operating with a phosphoric acid-doped polybenzimidazole (PBI) membrane because of the low immunity of expensive Pt-based catalysts toward phosphate ions. Therefore, finding inexpensive and phosphate-tolerant ORR electrocatalysts is highly demanded in HT-PEMFCs. It is reported that Fe and N co-functionalized carbon (Fe-NC) material is highly immune to phosphate anions, which makes it a good candidate for HT-PEMFC. In this work, highly micro- and mesoporous Fe-N-C catalysts are synthesized for the first time via a simple pyrolysis of organometallic ethylenediaminetetraacetic acid (EDTA)-Fe complexes prepared at different weight ratios of iron salt to EDTA. The organometallic EDTA-Fe complex is a complete single precursor for Fe and N as well as C and has never been used for the preparation of Fe-N-C catalysts before. This approach allows for the simultaneous optimization of both structural and functional properties of the Fe-N-C catalysts by simply varying the amount of iron salt, which plays both as an active species generation. The Fe-N-C catalyst is then further optimized by simply adding silica sol solution to and as a template for pore the initial precursor before carbonization followed by ammonia treatment to induce more mesopores and micropores as well as to further increase nitrogen doping, respectively, in the final carbon framework. This results in improved mass transfer and leads to the formation of more efficient ORR active sites. Interestingly, the Fe species are found to be present mainly as single-atom Fe species and also Fe particles over the N-doped carbon support, suggesting that the EDTA-Fe complex is an effective medium for generating atomic distribution of Fe in the carbon framework. The resulting single-atom Fe catalyst has been tested as an ORR electrocatalyst in HT-PEMFC, and the optimized catalyst shows a high peak power density of 260 mW cm(-2) and a current density of 1260 mA cm(-2) at 0.2 V. The high performance is likely correlated with the highly porous nature, the presence of efficient active sites associated with single-atomic Fe-N-x, and the immunity to phosphate adsorption of the iron nitrogenous catalysts despite extremely harsh fuel cell working environments.",nitrogen doping; single-atom iron; oxygen reduction reaction; EDTA-Fe organometallic complex; high-temperature polymer electrolyte membrane fuel cell,,nitrogen doping;single-atom iron;oxygen reduction reaction;EDTA-Fe organometallic complex;high-temperature polymer electrolyte membrane fuel cell,hjkim25@kist.re.kr; jsyu@dgist.ac.kr,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2574-0962,,,,English,ACS APPL ENERG MATER,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000595488500125,,South Korea;Germany;Taiwan,kist.re.kr,Daegu Gyeongbuk Inst Sci & Technol DGIST;German Aerosp Ctr DLR;KIST;Natl Taiwan Univ Sci & Technol,"Daegu Gyeongbuk Inst Sci & Technol DGIST, South Korea;German Aerosp Ctr DLR, Germany;KIST, South Korea;Natl Taiwan Univ Sci & Technol, Taiwan","Razmjooei, Fatemeh; Yu, Jeong-Hoon; Lee, Ha-Young; Lee, Byong-June; Singh, Kiran Pal; Kang, Tong-Hyun; Kim, Hyoung-Juhn; Yu, Jong-Sung"
"Kim, J., Yoo, J.M., Lee, H.S., Sung, Y.E., Hyeon, T.",Single-atom M-N-C catalysts for oxygen reduction electrocatalysis,2021,TRENDS IN CHEMISTRY,3,9,,779,794,16,55,10.1016/j.trechm.2021.05.009,,"[Kim, Jiheon; Yoo, Ji Mun; Lee, Hyeon Seok; Sung, Yung-Eun; Hyeon, Taeghwan] Inst Basic Sci IBS, Ctr Nanoparticle Res, Seoul, South Korea; [Kim, Jiheon; Yoo, Ji Mun; Lee, Hyeon Seok; Sung, Yung-Eun; Hyeon, Taeghwan] Seoul Natl Univ, Sch Chem & Biol Engn, Seoul, South Korea; [Kim, Jiheon; Yoo, Ji Mun; Lee, Hyeon Seok; Sung, Yung-Eun; Hyeon, Taeghwan] Seoul Natl Univ, Inst Chem Proc, Seoul, South Korea",,"Proton-exchange membrane fuel-cells (PEMFCs) are promising energy conversion devices for a renewable energy ecosystem. Developing highly active, durable, and cost-effective cathode catalysts is a significant challenge for the pervasive deploy-ment of PEMFCs. Bio-inspired single-atom M-N-C catalysts have emerged as a promising alternative to overcome the current limitations that originate from the high cost of noble metal catalysts. In this short review, we highlight recent advances in M-N-C catalysts in terms of three notable perspectives: atomic-level understanding and design of mononuclear active sites, the effect of the porous carbon structure on the electrocatalytic performance, and improving catalytic stability. In accordance with these topics, we also suggest future directions to further enhance M-N-C catalysts for highly active and stable PEMFC performance.",,DENSITY-FUNCTIONAL THEORY; IRON-BASED CATALYSTS; MEMBRANE FUEL-CELLS; ACTIVE-SITES; FE/N/C-CATALYSTS; CATHODE CATALYSTS; PERFORMANCE; CARBON; ORR; DESIGN,DENSITY-FUNCTIONAL THEORY;IRON-BASED CATALYSTS;MEMBRANE FUEL-CELLS;ACTIVE-SITES;FE/N/C-CATALYSTS;CATHODE CATALYSTS;PERFORMANCE;CARBON;ORR;DESIGN,ysung@snu.ac.kr; thyeon@snu.ac.kr,,"50 HAMPSHIRE ST, FLOOR 5, CAMBRIDGE, MA 02139 USA",,,,CELL PRESS,,,,,English,TRENDS CHEM,Review,WoS,Chemistry,WOS:000691346800010,2-s2.0-85108262772,South Korea,snu.ac.kr,Inst Basic Sci IBS;Seoul Natl Univ,"Inst Basic Sci IBS, South Korea;Seoul Natl Univ, South Korea","Kim, Jiheon; Yoo, Ji Mun; Lee, Hyeon Seok; Sung, Yung-Eun; Hyeon, Taeghwan"
"Hardisty, S.S., Lin, X., Kucernak, A., Zitoun, D.",Single-atom Pt on carbon nanotubes for selective electrocatalysis,2024,Carbon Energy,6,1,e409,,,,28,10.1002/cey2.409,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85168868692&doi=10.1002%2Fcey2.409&partnerID=40&md5=d0d221fd2f4a3f46e1c2fd284bd57b08,"Department of Chemistry, Bar-Ilan University, Ramat Gan, Tel Aviv District, Israel; Department of Chemistry, Imperial College London, London, United Kingdom","Hardisty, Samuel Spencer, Department of Chemistry, Bar-Ilan University, Ramat Gan, Tel Aviv District, Israel; Lin, Xiaoqian, Department of Chemistry, Imperial College London, London, United Kingdom; Kucernak, A. R.J., Department of Chemistry, Imperial College London, London, United Kingdom; Zitoun, David O., Department of Chemistry, Bar-Ilan University, Ramat Gan, Tel Aviv District, Israel","Utilizing supported single atoms as catalysts presents an opportunity to reduce the usage of critical raw materials such as platinum, which are essential for electrochemical reactions such as hydrogen oxidation reaction (HOR). Herein, we describe the synthesis of a Pt single electrocatalyst inside single-walled carbon nanotubes (SWCNTs) via a redox reaction. Characterizations via electron microscopy, X-ray photoelectron microscopy, and X-ray absorption spectroscopy show the single-atom nature of the Pt. The electrochemical behavior of the sample to hydrogen and oxygen was investigated using the advanced floating electrode technique, which minimizes mass transport limitations and gives a thorough insight into the activity of the electrocatalyst. The single-atom samples showed higher HOR activity than state-of-the-art 30% Pt/C while almost no oxygen reduction reaction activity in the proton exchange membrane fuel cell operating range. The selective activity toward HOR arose as the main fingerprint of the catalyst confinement in the SWCNTs. © 2023 The Authors. Carbon Energy published by Wenzhou University and John Wiley & Sons Australia, Ltd.",confinement; electrocatalysis; hydrogen; platinum; single atom catalysts,Atoms; Electrocatalysis; Electrocatalysts; Electrolytic reduction; Hydrogen; Oxygen; Photoelectron spectroscopy; Proton exchange membrane fuel cells (PEMFC); Redox reactions; Single-walled carbon nanotubes (SWCN); X ray absorption spectroscopy; Australia; Carbon energy; Confinement; Hydrogen oxidation reaction; Reaction activity; Single atom catalyst; Single-atoms; Single-walled carbon; Wenzhou; ]+ catalyst; Platinum,confinement;electrocatalysis;hydrogen;platinum;single atom catalysts;Atoms;Electrocatalysts;Electrolytic reduction;Oxygen;Photoelectron spectroscopy;Proton exchange membrane fuel cells (PEMFC);Redox reactions;Single-walled carbon nanotubes (SWCN);X ray absorption spectroscopy;Australia;Carbon energy;Hydrogen oxidation reaction;Reaction activity;Single atom catalyst;Single-atoms;Single-walled carbon;Wenzhou;]+ catalyst,"D. Zitoun; Department of Chemistry, Bar Ilan Institute of Nanotechnology and Advanced Materials (BINA), Bar Ilan University, Ramat Gan, Israel; email: david.zitoun@biu.ac.il",,,,,,John Wiley and Sons Inc,,,,,English,Carb. Energy.,Article,Scopus,,2-s2.0-85168868692,,Israel;United Kingdom,biu.ac.il,,,"Hardisty, S.S.; Lin, X.; Kucernak, A.; Zitoun, D."
"Zeng, X., Shui, J., Liu, X., Liu, Q., Li, Y., Shang, J., Zheng, L., Yu, R.",Single-Atom to Single-Atom Grafting of Pt1 onto FeN4 Center: Pt1@FeNC Multifunctional Electrocatalyst with Significantly Enhanced Properties,2018,Advanced Energy Materials,8,1,1701345,,,,457,10.1002/aenm.201701345,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85040186585&doi=10.1002%2Faenm.201701345&partnerID=40&md5=4896d759c7f36378b5bd44c1a889cd60,"School of Materials Science and Engineering, Beihang University, Beijing, China; Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China","Zeng, Xiaojun, School of Materials Science and Engineering, Beihang University, Beijing, China; Shui, Jianglan, School of Materials Science and Engineering, Beihang University, Beijing, China; Liu, Xiaofang, School of Materials Science and Engineering, Beihang University, Beijing, China; Liu, Qingtao, School of Materials Science and Engineering, Beihang University, Beijing, China; Li, Yongcheng, School of Materials Science and Engineering, Beihang University, Beijing, China; Shang, Jiaxiang, School of Materials Science and Engineering, Beihang University, Beijing, China; Zheng, Lirong, Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China; Yu, Ronghai, School of Materials Science and Engineering, Beihang University, Beijing, China","Nonprecious metal catalysts (NPMCs) FeNC are promising alternatives to noble metal Pt as the oxygen reduction reaction (ORR) catalysts for proton-exchange-membrane fuel cells. Herein, a new modulation strategy is reported to the active moiety FeN<inf>4</inf> via a precise “single-atom to single-atom” grafting of a Pt atom onto the Fe center through a bridging oxygen molecule, creating a new active moiety of Pt<inf>1</inf>O<inf>2</inf>Fe<inf>1</inf>N<inf>4</inf>. The modulated FeNC exhibits remarkably improved ORR stabilities in acidic media. Moreover, it shows unexpectedly high catalytic activities toward oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), with overpotentials of 310 mV for OER in alkaline solution and 60 mV for HER in acidic media at a current density of 10 mA cm−2, outperforming the benchmark RuO<inf>2</inf> and comparable with Pt/C(20%), respectively. The enhanced multifunctional electrocatalytic properties are associated with the newly constructed active moiety Pt<inf>1</inf>O<inf>2</inf>Fe<inf>1</inf>N<inf>4</inf>, which protects Fe sites from harmful species. Density functional theory calculations reveal the synergy in the new active moiety, which promotes the proton adsorption and reduction kinetics. In addition, the grafted Pt<inf>1</inf>O<inf>2</inf> dangling bonds may boost the OER activity. This study paves a new way to improve and extend NPMCs electrocatalytic properties through a precisely single-atom to single-atom grafting strategy. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",FeNC; fuel cells; ORR/OER/HER; platinum; single-atom catalysts,Atoms; Catalyst activity; Catalysts; Dangling bonds; Density functional theory; Electrocatalysts; Electrolytic reduction; Fuel cells; Grafting (chemical); Oxygen; Platinum; Precious metals; Proton exchange membrane fuel cells (PEMFC); Ruthenium compounds; Adsorption and reduction; Electrocatalytic properties; Hydrogen evolution reactions; Non-precious metal catalysts; ORR/OER/HER; Oxygen evolution reaction; Oxygen reduction reaction; Single atoms; Platinum compounds,FeNC;fuel cells;ORR/OER/HER;platinum;single-atom catalysts;Atoms;Catalyst activity;Catalysts;Dangling bonds;Density functional theory;Electrocatalysts;Electrolytic reduction;Grafting (chemical);Oxygen;Precious metals;Proton exchange membrane fuel cells (PEMFC);Ruthenium compounds;Adsorption and reduction;Electrocatalytic properties;Hydrogen evolution reactions;Non-precious metal catalysts;Oxygen evolution reaction;Oxygen reduction reaction;Single atoms;Platinum compounds,"J. Shui; School of Materials Science and Engineering, Beihang University, Beijing, No. 37 Xueyuan Road, 100083, China; email: shuijianglan@buaa.edu.cn",,,,,,Wiley-VCH Verlag info@wiley-vch.de,16146832,,,,English,Adv. Energy Mater.,Article,Scopus,,2-s2.0-85040186585,,China,buaa.edu.cn,,,"Zeng, X.; Shui, J.; Liu, X.; Liu, Q.; Li, Y.; Shang, J.; Zheng, L.; Yu, R."
"He, Y., Guo, H., Hwang, S., Yang, X., He, Z., Braaten, J., Karakalos, S., Shan, W., Wang, M., Zhou, H., Feng, Z., More, K.L., Wang, G., Su, D., Cullen, D.A., Fei, L., Litster, S., Wu, G.",Single Cobalt Sites Dispersed in Hierarchically Porous Nanofiber Networks for Durable and High-Power PGM-Free Cathodes in Fuel Cells,2020,Advanced Materials,32,46,2003577,,,,356,10.1002/adma.202003577,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85092452614&doi=10.1002%2Fadma.202003577&partnerID=40&md5=3740aa582da2df83eb247396943707e0,"School of Engineering and Applied Sciences, Buffalo, NY, United States; College of Engineering, Lafayette, LA, United States; Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, United States; College of Engineering, Pittsburgh, PA, United States; Molinaroli College of Engineering and Computing, Columbia, SC, United States; Swanson School of Engineering, Pittsburgh, PA, United States; College of Engineering, Corvallis, OR, United States; X-ray Science Division, Argonne National Laboratory, Lemont, IL, United States; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States","He, Yanghua, School of Engineering and Applied Sciences, Buffalo, NY, United States; Guo, Hui, College of Engineering, Lafayette, LA, United States; Hwang, Sooyeon, Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, United States; Yang, Xiaoxuan, School of Engineering and Applied Sciences, Buffalo, NY, United States; He, Zizhou, College of Engineering, Lafayette, LA, United States; Braaten, Jonathan P., College of Engineering, Pittsburgh, PA, United States; Karakalos, Stavros G., Molinaroli College of Engineering and Computing, Columbia, SC, United States; Shan, Weitao, Swanson School of Engineering, Pittsburgh, PA, United States; Wang, Maoyu, College of Engineering, Corvallis, OR, United States; Zhou, Hua, X-ray Science Division, Argonne National Laboratory, Lemont, IL, United States; Feng, Zhenxing, College of Engineering, Corvallis, OR, United States; More, Karren L., Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Wang, Guofeng, Swanson School of Engineering, Pittsburgh, PA, United States; Su, Dong, Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, United States; Cullen, David A., Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Fei, Ling, College of Engineering, Lafayette, LA, United States; Litster, Shawn E., College of Engineering, Pittsburgh, PA, United States; Wu, Gang, School of Engineering and Applied Sciences, Buffalo, NY, United States","Increasing catalytic activity and durability of atomically dispersed metal–nitrogen–carbon (M–N–C) catalysts for the oxygen reduction reaction (ORR) cathode in proton-exchange-membrane fuel cells remains a grand challenge. Here, a high-power and durable Co–N–C nanofiber catalyst synthesized through electrospinning cobalt-doped zeolitic imidazolate frameworks into selected polyacrylonitrile and poly(vinylpyrrolidone) polymers is reported. The distinct porous fibrous morphology and hierarchical structures play a vital role in boosting electrode performance by exposing more accessible active sites, providing facile electron conductivity, and facilitating the mass transport of reactant. The enhanced intrinsic activity is attributed to the extra graphitic N dopants surrounding the CoN<inf>4</inf> moieties. The highly graphitized carbon matrix in the catalyst is beneficial for enhancing the carbon corrosion resistance, thereby promoting catalyst stability. The unique nanoscale X-ray computed tomography verifies the well-distributed ionomer coverage throughout the fibrous carbon network in the catalyst. The membrane electrode assembly achieves a power density of 0.40 W cm−2 in a practical H<inf>2</inf>/air cell (1.0 bar) and demonstrates significantly enhanced durability under accelerated stability tests. The combination of the intrinsic activity and stability of single Co sites, along with unique catalyst architecture, provide new insight into designing efficient PGM-free electrodes with improved performance and durability. © 2020 Wiley-VCH GmbH",electrocatalysis; electrospinning; fuel cells; oxygen reduction; single Co sites,Catalyst activity; Cathodes; Cobalt; Cobalt compounds; Computerized tomography; Corrosion resistance; Durability; Electrolytic reduction; Nanocatalysts; Nanofibers; Oxygen reduction reaction; Electrode performance; Electron conductivity; Hierarchical structures; Hierarchically porous; Membrane electrode assemblies; Poly(vinyl pyrrolidone); X-ray computed tomography; Zeolitic imidazolate frameworks; Proton exchange membrane fuel cells (PEMFC),electrocatalysis;electrospinning;fuel cells;oxygen reduction;single Co sites;Catalyst activity;Cathodes;Cobalt;Cobalt compounds;Computerized tomography;Corrosion resistance;Durability;Electrolytic reduction;Nanocatalysts;Nanofibers;Oxygen reduction reaction;Electrode performance;Electron conductivity;Hierarchical structures;Hierarchically porous;Membrane electrode assemblies;Poly(vinyl pyrrolidone);X-ray computed tomography;Zeolitic imidazolate frameworks;Proton exchange membrane fuel cells (PEMFC),"G. Wu; Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, 14260, United States; email: gangwu@buffalo.edu; L. Fei; Department of Chemical Engineering, University of Louisiana at Lafayette, Lafayette, 70504, United States; email: ling.fei@louisiana.edu; S. Litster; Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, 15213, United States; email: litster@andrew.cmu.edu; D.A. Cullen; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, 37831, United States; email: cullenda@ornl.gov",,,,,,Wiley-VCH Verlag,09359648,,ADVME,33058263,English,Adv Mater,Article,Scopus,,2-s2.0-85092452614,,United States,buffalo.edu,,,"He, Y.; Guo, H.; Hwang, S.; Yang, X.; He, Z.; Braaten, J.; Karakalos, S.; Shan, W.; Wang, M.; Zhou, H.; Feng, Z.; More, K.L.; Wang, G.; Su, D.; Cullen, D.A.; Fei, L.; Litster, S.; Wu, G."
"Huang, C.C., Chen, Y.H., Lee, C.Y., Chen, Y.S., Li, Y.Y.",Single iron atom embedded in dual-size nitrogen-doped carbon framework on reduced graphene oxide: An effective catalyst for proton exchange membrane fuel cells,2024,JOURNAL OF POWER SOURCES,594,,233963,,,10,7,10.1016/j.jpowsour.2023.233963,,"[Huang, Cheng-Che; Chen, Yu-Hui; Lee, Chung-Yu; Li, Yuan-Yao] Natl Chung Cheng Univ, Dept Chem Engn, Minxiong 62102, Chiayi, Taiwan; [Chen, Yong-Song] Natl Chung Cheng Univ, Dept Mech Engn, Chiayi 62102, Taiwan; [Chen, Yong-Song; Li, Yuan-Yao] Natl Chung Cheng Univ, Adv Inst Mfg High Tech Innovat, Chiayi 62102, Taiwan",,"The commercialization of Proton Exchange Membrane Fuel Cells (PEMFCs) is hindering by the cost of noble metal catalysts. We are introducing A-Fe-SAC-NCDS/rGO, a novel catalyst derived from metal-organic framework through carbonization and ammonia treatment. This catalyst is incorporating single iron atoms (FeSAC) within dual-sized porous nitrogen-carbon frameworks (NCDS, 30 nm and 100 nm), supporting on reduced graphene oxide (rGO). The catalyst is providing abundant active sites, with NCDS increasing active site density and rGO enhancing material conductivity. Consequently, catalyst is exceling in the oxygen reduction reaction, boasting an onset potential of 0.807 V and a half-wave potential of 0.779 V, near benchmark Pt/C catalyst. PEMFC tests employing A-Fe-SAC-NCDS/rGO achieved a power density of 780.7 mWcm(-2) at 1.6 A cm(-2) in an H-2-O-2 system. In durability tests at 0.6 Acm(-2) in H-2-air, voltage loss was 28.68 % after 50 h. These results position the catalyst as a promising choice for PEMFC.",Proton exchange membrane fuel cell; Metal-organic framework; Nonprecious metal nanocatalysts; Oxygen reduction reaction; Single atom catalyst,OXYGEN REDUCTION REACTION; PT-M M; WATER MANAGEMENT; POROUS CARBON; FE; PERFORMANCE; SITES; CO; ELECTROCATALYSTS; ADVANCEMENTS,Proton exchange membrane fuel cell;Metal-organic framework;Nonprecious metal nanocatalysts;Oxygen reduction reaction;Single atom catalyst;PT-M M;WATER MANAGEMENT;POROUS CARBON;FE;PERFORMANCE;SITES;CO;ELECTROCATALYSTS;ADVANCEMENTS,chmyyl@ccu.edu.tw,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:001166133200001,2-s2.0-85181583497,Taiwan,ccu.edu.tw,Natl Chung Cheng Univ,"Natl Chung Cheng Univ, Taiwan","Huang, Cheng-Che; Chen, Yu-Hui; Lee, Chung-Yu; Chen, Yong-Song; Li, Yuan-Yao"
"Liang, X.H., Zhao, P.W., Gao, Z.Y., Liang, J.S., Yang, X.X., Ao, K., Zhu, J.W., Mei, Y., Wu, G., Zhu, Y.Z.",Single iron site catalysts with increased metal-site loading via a high-temperature imprinting approach for proton exchange membrane fuel cells,2025,JOURNAL OF MATERIALS CHEMISTRY A,13,22,,16850,16859,10,0,10.1039/d5ta01260k,,"[Liang, Xinhong; Gao, Zhiyuan; Ao, Kai; Zhu, Jianwen; Mei, Yi; Zhu, Yuanzhi] Kunming Univ Sci & Technol, Fac Chem Engn, Kunming 650500, Yunnan, Peoples R China; [Liang, Xinhong; Gao, Zhiyuan; Ao, Kai; Zhu, Jianwen; Mei, Yi; Zhu, Yuanzhi] Yunnan Prov Key Lab Energy Saving Phosphorus Chem, Kunming 650500, Peoples R China; [Liang, Xinhong; Gao, Zhiyuan; Ao, Kai; Zhu, Jianwen; Mei, Yi; Zhu, Yuanzhi] Yunnan Technol Innovat Ctr Phosphorus Resources, Kunming 650600, Peoples R China; [Zhao, Pengwei] Collaborat Innovat Ctr Chem Sci & Engn, State Key Lab Chem Engn, Tianjin 300072, Peoples R China; [Liang, Jiashun; Yang, Xiaoxuan; Wu, Gang] SUNY Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA",,"Fe-N-C materials have been widely accepted as the most promising catalysts to replace Pt in future fuel cells. However, the loading of active atomic Fe sites in catalysts remains insufficient (<1.0 wt%) due to Fe agglomeration and carbothermal reduction during the synthesis at elevated heating temperatures (>900 degrees C). Here, we explored an active-site imprinting approach to convert less active ZnNx or nitrogen vacancies (V-N-x) into FeN4. We demonstrated that the reaction barrier of ZnN4 to FeN4 (trans-metalation) pathways is significantly lower than that of V-N-4 to FeN4 (metalation) ones, indicating the importance of forming high-loading ZnN4 sites first. FeCl2 precursors are preferable over FeCl3 during active-site imprinting despite their relatively high boiling point. Eventually, the high-temperature active-site imprinting strategy based on a vacuum-sealed reaction system enables an Fe-N-C catalyst containing exceptionally high atomic Fe site loading up to 5.65 wt%. The resulting catalyst exhibited encouraging ORR activity and stability in challenging acidic media.",,OXYGEN REDUCTION; ACTIVE-SITES; ABSORPTION; PERFORMANCE; ELECTROCATALYSTS; IDENTIFICATION; NITROGEN,OXYGEN REDUCTION;ACTIVE-SITES;ABSORPTION;PERFORMANCE;ELECTROCATALYSTS;IDENTIFICATION;NITROGEN,yuanzhi_zhu@kust.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:001482851400001,2-s2.0-105004654277,China;United States,kust.edu.cn,Kunming Univ Sci & Technol;Yunnan Prov Key Lab Energy Saving Phosphorus Chem;Yunnan Technol Innovat Ctr Phosphorus Resources;Collaborat Innovat Ctr Chem Sci & Engn;SUNY Buffalo,"Kunming Univ Sci & Technol, China;Yunnan Prov Key Lab Energy Saving Phosphorus Chem, China;Yunnan Technol Innovat Ctr Phosphorus Resources, China;Collaborat Innovat Ctr Chem Sci & Engn, China;SUNY Buffalo, United States","Liang, Xinhong; Zhao, Pengwei; Gao, Zhiyuan; Liang, Jiashun; Yang, Xiaoxuan; Ao, Kai; Zhu, Jianwen; Mei, Yi; Wu, Gang; Zhu, Yuanzhi"
"Zhao, X.L., Yang, X.X., Wang, M.Y., Hwang, S., Karakalos, S., Chen, M.J., Qiao, Z., Wang, L., Liu, B., Ma, Q., Cullen, D.A., Su, D., Yang, H.P., Zang, H.Y., Feng, Z.X., Wu, G.",Single-Iron Site Catalysts with Self-Assembled Dual-size Architecture and Hierarchical Porosity for Proton-Exchange Membrane Fuel Cells,2020,APPLIED CATALYSIS B-ENVIRONMENTAL,279,,119400,,,11,118,10.1016/j.apcatb.2020.119400,,"[Zhao, Xiaolin; Wang, Lei; Liu, Bin; Yang, Haipeng] Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen Key Lab Polymer Sci & Technol, Shenzhen 518060, Peoples R China; [Zhao, Xiaolin; Wang, Lei] Shenzhen Univ, Coll Optoelect Engn, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov, Shenzhen 518060, Peoples R China; [Zhao, Xiaolin; Yang, Xiaoxuan; Chen, Mengjie; Qiao, Zhi; Wu, Gang] Univ Buffalo State Univ New York, Dept Chem & Biol Engn, Buffalo, NY 14260 USA; [Yang, Xiaoxuan; Zang, Hong-Ying] Northeast Normal Univ, Fac Chem, Key Lab Polyoxometetalate Sci, Minist Educ, Changchun 130024, Peoples R China; [Wang, Maoyu; Feng, Zhenxing] Oregon State Univ, Sch Chem Biol & Environm Engn, Corvallis, OR 97331 USA; [Hwang, Sooyeon; Su, Dong] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA; [Karakalos, Stavros] Univ South Carolina, Dept Chem Engn, Columbia, SC 29208 USA; [Ma, Qing] Northwestern Univ, Synchrotron Res Ctr, DND CAT, Evanston, IL 60208 USA; [Cullen, David A.] Oak Ridge Natl Lab, Mat Sci & Technol Div, POB 2009, Oak Ridge, TN 37831 USA",,"Atomically dispersed and nitrogen coordinated single iron site (Le., FeN4) catalysts (Fe-N-C) are the most promising platinum group metal (PGM)-free cathode for the oxygen reduction reaction (ORR) in proton-exchange membrane fuel cells (PEMFCs). However, current Fe-N-C catalysts are limited by the inferior exposure of active FeN4 sites due to the inevitable agglomeration of particles in cathodes. Herein, we report a self-assembled strategy to synthesize the atomically dispersed FeN4 site catalysts with a hierarchically porous matrix derived from dual-size Fe-doped ZIF-8 crystal precursors by using large particles to support small particles. The tailored structure is effective in mitigating the particle migration, agglomeration, and spatial overlap, thereby exposing increased accessible active sites and facilitating mass transport. The best performing catalyst composed of 100 nm ""nucleated seed"" assembled by 30 nm ""satellite"" demonstrates exceptional ORR activity in acidic electrolyte and membrane electrode assembly. This work provides new concepts for designing hierarchically porous catalysts with single metal atom dispersion via self-assembly of ZIF-8 crystal precursors with tunable particle sizes and nanostructures.",Single metal sites; oxygen reduction; self-assembly architecture; electrocatalysis; fuel cells,BIFUNCTIONAL OXYGEN REDUCTION; NITROGEN-CARBON CATALYSTS; METAL-ORGANIC FRAMEWORKS; N-C CATALYSTS; CATHODE CATALYSTS; ACTIVE-SITES; PERFORMANCE; ELECTROCATALYSTS; ALKALINE; NANOSTRUCTURES,Single metal sites;oxygen reduction;self-assembly architecture;electrocatalysis;fuel cells;BIFUNCTIONAL OXYGEN REDUCTION;NITROGEN-CARBON CATALYSTS;METAL-ORGANIC FRAMEWORKS;N-C CATALYSTS;CATHODE CATALYSTS;ACTIVE-SITES;PERFORMANCE;ELECTROCATALYSTS;ALKALINE;NANOSTRUCTURES,yanghp@szu.edu.cn; zanghy100@nenu.edu.cn; zhenxing.feng@oregonstate.edu; gangwu@buffalo.edu,,"RADARWEG 29a, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0926-3373,,,,English,APPL CATAL B-ENVIRON,Article,WoS,Chemistry; Engineering,WOS:000566455400003,2-s2.0-85089191353,China;United States,szu.edu.cn,Shenzhen Univ;Univ Buffalo State Univ New York;Northeast Normal Univ;Oregon State Univ;Brookhaven Natl Lab;Univ South Carolina;Northwestern Univ;Oak Ridge Natl Lab,"Shenzhen Univ, China;Univ Buffalo State Univ New York, United States;Northeast Normal Univ, China;Oregon State Univ, United States;Brookhaven Natl Lab, United States;Univ South Carolina, United States;Northwestern Univ, United States;Oak Ridge Natl Lab, United States","Zhao, Xiaolin; Yang, Xiaoxuan; Wang, Maoyu; Hwang, Sooyeon; Karakalos, Stavros; Chen, Mengjie; Qiao, Zhi; Wang, Lei; Liu, Bin; Ma, Qing; Cullen, David A.; Su, Dong; Yang, Haipeng; Zang, Hong-Ying; Feng, Zhenxing; Wu, Gang"
"Yu, C., Xiao, W., Huang, J., Hao, C., Shen, P.K., Tian, Z.Q.",Single yttrium atom coordinated by nitrogen and oxygen with an asymmetric 4d orbit as efficient oxygen reduction electrocatalyst,2025,Journal of Colloid and Interface Science,691,,137425,,,,2,10.1016/j.jcis.2025.137425,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105001055744&doi=10.1016%2Fj.jcis.2025.137425&partnerID=40&md5=2ef41f6c7bc3af01f3cb662871846cde,"State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China","Yu, Cunhuai, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Xiao, Wanling, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Huang, Ji, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Hao, Chao, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Shen, Peikang, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Tian, Zhiqun, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China","Developing transition metal-nitrogen-carbon (M[sbnd]N[sbnd]C) with the inert metal-atom center for the Fenton reaction is crucial to achieving precious metal-free electrocatalysis of oxygen reduction reaction (ORR). Herein, we report a new structure of Y[sbnd]N[sbnd]C nanosheets for efficient ORR, which was synthesized by pyrolyzing the Y ion-containing self-polymerized compound of 2, 4, 6-triaminopyrimidine (TAP) as a new precursor. Results demonstrate that the precursor of TAP with high N content is capable of forming atomically dispersed specific YN<inf>4</inf>O moieties anchoring in N-rich carbon nanosheets, exhibiting excellent ORR performance with a higher half-wave potential of 0.88 V and 0.78 V in 0.1 M KOH and 0.5 M H<inf>2</inf>SO<inf>4</inf> than Fe[sbnd]N[sbnd]C synthesized by the same strategy. Meanwhile, the zinc-air battery and proton exchange membrane fuel cell tests also verify its feasibility for practical application with a maximum power output density of 151 mW cm−2 and 496 mW cm−2 respectively. Theoretical calculations further reveal that the axial O coordination in YN<inf>4</inf> moiety causes an symmetry breaking of the d-orbital electrons of yttrium and weakens the spin polarization, which can shift the rate-limiting step from the *OH step to the *OOH step with a lower ORR overpotential than the classic Fe[sbnd]N[sbnd]C. This work proves that Y[sbnd]N[sbnd]C with single yttrium atom holds a great promise as a substitute for the conventional Fe[sbnd]N[sbnd]C with active Fenton effect as a none-precious metal ORR electrocatalyst. © 2025 Elsevier Inc.",Fuel cell; Oxygen reduction reaction; Single Yttrium atom catalyst; Transition metal-nitrogen-carbon; Zinc-air battery,"Electrolytic reduction; Iron compounds; Manganese compounds; Oxygen reduction reaction; Potassium compounds; Yttrium oxide; Zinc air batteries; Zinc compounds; Inert metals; Metal atoms; Nitrogen-carbon; Oxygen Reduction; Single yttrium atom catalyst; Synthesised; Transition metal-nitrogen-carbon; Zinc-air battery; ]+ catalyst; Yttrium; 2,4,6 triaminopyrimidine; carbon; electrolyte; iron; lanthanide; ligand; nanosheet; nitrogen; oxygen; proton; transition element; yttrium; zinc; adsorption; Article; atom; calculation; catalyst; desorption; electric potential; electrocatalysis; electrochemical analysis; electron; electron microscopy; electron transport; energy resource; Fenton reaction; membrane; polarization; pore size distribution; proton exchange membrane fuel cell; reduction (chemistry); reference electrode; synthesis; X ray diffraction; article; controlled study; exercise; fuel; nonhuman; ORBIT score","Fuel cell;Oxygen reduction reaction;Single Yttrium atom catalyst;Transition metal-nitrogen-carbon;Zinc-air battery;Electrolytic reduction;Iron compounds;Manganese compounds;Potassium compounds;Yttrium oxide;Zinc air batteries;Zinc compounds;Inert metals;Metal atoms;Nitrogen-carbon;Oxygen Reduction;Synthesised;]+ catalyst;Yttrium;2,4,6 triaminopyrimidine;carbon;electrolyte;iron;lanthanide;ligand;nanosheet;nitrogen;oxygen;proton;transition element;zinc;adsorption;Article;atom;calculation;catalyst;desorption;electric potential;electrocatalysis;electrochemical analysis;electron;electron microscopy;electron transport;energy resource;Fenton reaction;membrane;polarization;pore size distribution;proton exchange membrane fuel cell;reduction (chemistry);reference electrode;synthesis;X ray diffraction;controlled study;exercise;fuel;nonhuman;ORBIT score","Z.Q. Tian; Collaborative Innovation Center of Sustainable Energy Materials, School of Physical Science and Technology, Guangxi University, Guangxi Key Laboratory of Electrochemical Energy Materials, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning, 530004, China; email: tianzhiqun@gxu.edu.cn",,,,,,Academic Press Inc.,00219797,,JCISA,40154164,English,J. Colloid Interface Sci.,Article,Scopus,,2-s2.0-105001055744,,China,gxu.edu.cn,,,"Yu, C.; Xiao, W.; Huang, J.; Hao, C.; Shen, P.K.; Tian, Z.Q."
"Yang, X.H., Wang, Y.C., Zhang, G.X., Du, L., Yang, L.J., Markiewicz, M., Choi, J.Y., Chenitz, R., Sun, S.H.",SiO2-Fe/N/C catalyst with enhanced mass transport in PEM fuel cells,2020,APPLIED CATALYSIS B-ENVIRONMENTAL,264,,118523,,,8,110,10.1016/j.apcatb.2019.118523,,"[Yang, Xiaohua; Wang, Yucheng; Zhang, Gaixia; Du, Lei; Chenitz, Regis; Sun, Shuhui] Inst Natl Rech Sci Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada; [Wang, Yucheng] Xiamen Univ, Coll Chem & Chem Engn, Collaborat Innovat Ctr Chem Energy Mat, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China; [Yang, Lijun; Markiewicz, Matthew; Choi, Ja-yeon] Ballard Power Syst Inc, Burnaby, BC V5J 5J8, Canada",,"Today's high-loading non-platinum group metal (non-PGM, e.g., Fe/N/C) catalyst layer has presented a comparable performance to commercial Pt/C catalyst layer in the kinetic region. However, if the non-PGM catalyst layer is too thick (i.e. high loading), it will inevitably result in a severe performance loss in the mass-transport region. Herein, we employed SiO2 nanoparticle chains to adjust the mesoporous structure and wettability (i.e., making the catalyst surface more hydrophobic), in order to enhance the mass-transport properties of the catalyst layer with high-loading of Fe/N/C (labeled as SiO2-Fe/N/C). Simultaneously, SiO2-Fe/N/C catalyst shows more pyridinic-N and defects in the carbon matrix, which may create more active sites and thus compensate the decreased mass activity of oxygen reduction reaction (ORR) caused by the incorporation of inactive SiO2. Further, SiO2-Fe/N/C catalyst exhibits more than 25% performance increase (e.g., at 0.4 V) than the pristine Fe/N/C in H-2/Air proton exchange membrane fuel cells (PEMFCs). This work provides a new and effective strategy to improve the mass-transport properties of the Fe/N/C catalysts.",SiO2-Fe/N/C; Porosity; Hydrophobicity; Mass transport; PEMFCs,OXYGEN REDUCTION REACTION; HIGH-PERFORMANCE ELECTROCATALYSTS; NONPRECIOUS METAL-CATALYSTS; NON-PGM ELECTROCATALYSTS; DOPED CARBON NANOFIBERS; ACTIVE-SITES; PYRIDINIC NITROGEN; IRON; STABILITY; GRAPHENE,SiO2-Fe/N/C;Porosity;Hydrophobicity;Mass transport;PEMFCs;OXYGEN REDUCTION REACTION;HIGH-PERFORMANCE ELECTROCATALYSTS;NONPRECIOUS METAL-CATALYSTS;NON-PGM ELECTROCATALYSTS;DOPED CARBON NANOFIBERS;ACTIVE-SITES;PYRIDINIC NITROGEN;IRON;STABILITY;GRAPHENE,gaixia.zhang@emt.inrs.ca; shuhui@emt.inrs.ca,,"RADARWEG 29a, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0926-3373,,,,English,APPL CATAL B-ENVIRON,Article,WoS,Chemistry; Engineering,WOS:000515195200052,2-s2.0-85076522548,Canada;China,emt.inrs.ca,Inst Natl Rech Sci Energie Mat & Telecommun;Xiamen Univ;Ballard Power Syst Inc,"Inst Natl Rech Sci Energie Mat & Telecommun, Canada;Xiamen Univ, China;Ballard Power Syst Inc, Canada","Yang, Xiaohua; Wang, Yucheng; Zhang, Gaixia; Du, Lei; Yang, Lijun; Markiewicz, Matthew; Choi, Ja-yeon; Chenitz, Regis; Sun, Shuhui"
"Liu, F., Shi, L., Lin, X.N., Yu, D.L., Zhang, C., Xu, R., Liu, D., Qiu, J.S., Dai, L.M.",Site-density engineering of single-atomic iron catalysts for high-performance proton exchange membrane fuel cells,2022,APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY,302,,120860,,,11,71,10.1016/j.apcatb.2021.120860,,"[Liu, Feng; Shi, Lei; Lin, Xuanni; Yu, Donglin; Zhang, Cai; Xu, Rui; Liu, Dong; Qiu, Jieshan; Dai, Liming] Beijing Univ Chem Technol, Coll Chem Engn, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China; [Liu, Feng; Shi, Lei; Yu, Donglin] Beijing Univ Chem Technol, Coll Mat Sci & Engn, Beijing 100029, Peoples R China; [Dai, Liming] Univ New South Wales, Sch Chem Engn, Australian Carbon Mat Ctr A CMC, Sydney, NSW 2052, Australia",,"The design and development of highly efficient non-precious metal single-atomic ORR catalysts for proton exchange membrane fuel cells (PEMFCs) are highly desirable but challenging. Herein, we report a novel polydopamine (PDA)-metal complex-assisted pyrolysis strategy for producing zeolitic imidazolate framework-derived catalysts with a hierarchically porous carbon support and highly exposed dense-FeN4 sites (Z8@DA-FIP-950-C). The resultant Z8@DA-FIP-950-C catalyst shows remarkably enhanced performance for oxygen reduction reaction (ORR) with a half-wave potential (E1/2) of 0.828 V in 0.1 M HClO4 solution, which is close to commercial 20 wt% Pt/C catalyst. Impressively, the Z8@DA-FIP-950-C exhibits peak power densities of 982 and 454 mW cm-2 in H2/ O2 and H2/air PEMFCs, respectively, which are superior to most of non-precious metal catalysts reported to date. In addition, we construct the quantitative relationship between the active site activity and ORR performance, and prove the dominating role of the FeN4 site density to the observed excellent PEMFC performance. This work demonstrates a facile strategy to prepare the 3D hierarchically porous carbons with a maximized exposure of high-dense FeN4 sites (without acid treatment), providing a useful guidance for the design and development of novel highly-efficient single-atom catalysts for the renewable energy applications.",Oxygen reduction; Single-atom catalysts; N-doped porous carbons; Active site density; Fuel cell,OXYGEN REDUCTION REACTION; N-C ELECTROCATALYST; ACTIVE-SITES; CARBON; IDENTIFICATION; GRAPHENE; DEFECT; ORR,Oxygen reduction;Single-atom catalysts;N-doped porous carbons;Active site density;Fuel cell;OXYGEN REDUCTION REACTION;N-C ELECTROCATALYST;ACTIVE-SITES;CARBON;IDENTIFICATION;GRAPHENE;DEFECT;ORR,liudong@mail.buct.edu.cn; l.dai@unsw.edu.au,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0926-3373,,,,English,APPL CATAL B-ENVIRON,Article,WoS,Chemistry; Engineering,WOS:000720459700002,2-s2.0-85118474080,China;Australia,mail.buct.edu.cn,Beijing Univ Chem Technol;Univ New South Wales,"Beijing Univ Chem Technol, China;Univ New South Wales, Australia","Liu, Feng; Shi, Lei; Lin, Xuanni; Yu, Donglin; Zhang, Cai; Xu, Rui; Liu, Dong; Qiu, Jieshan; Dai, Liming"
"Huo, J.H., Jiang, W., Xia, L., Gomes, B.F., Zhao, Y.X., Wei, Y.P., Zhu, X.Y., Xia, D.S., Chen, M., Gan, L.",Solid-phase production of Co-N-C electrocatalysts at a kilogram scale via the Kirkendall effect for proton exchange membrane fuel cells,2025,EES CATALYSIS,,,,,,10,0,10.1039/d5ey00264h,,"[Huo, Jiaheng; Xia, Dongsheng; Chen, Min] Foshan Univ, Sch Mat & Energy, Foshan 528000, Peoples R China; [Huo, Jiaheng; Xia, Dongsheng; Chen, Min] Yunfu Ind Technol Res Inst New Energy & New Mat, Guangdong Prov Key Lab Green Energy Mat & Devices, Yunfu 527300, Peoples R China; [Jiang, Wulyu; Xia, Lu] Rhein Westfal TH Aachen, Fac Mech Engn, D-52056 Aachen, Germany; [Gomes, Bruna Ferreira] Univ Bayreuth, Electrochem Proc Engn, Univ Str 30, D-95447 Bayreuth, Germany; [Zhao, Yunxing] Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China; [Wei, Yinping; Zhu, Xuya; Gan, Lin] Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Guangdong Higher Educ Inst,Shenzhen Key Lab Adv La, Inst Mat Res,Key Lab Electrocatalyt Mat & Green Hy, Shenzhen 518055, Peoples R China",,"Platinum-group metal-free single-atom catalysts (SACs) are vital for cost-effective fuel cells, yet their adoption is hindered by performance limitations and challenges in scalable production. While Fe-N-C SACs offer high activity, their stability is severely compromised by Fenton-induced degradation. To address this, Co-N-C SACs have emerged as promising alternatives due to their much lower Fenton activity and hence improved durability. However, conventional synthesis relies on solvent-intensive methods, limiting large-scale, environmentally friendly production and precise structural control. Here, we report a solid-phase synthesis strategy via the Kirkendall effect for the kilogram-scale production of Co-doped zeolitic imidazolate framework-8 (Co-ZIF-8) with high reproducibility and precise compositional control. Further pyrolysis at high temperatures enables the formation of structurally well-defined Co-N-C SACs with tunable composition, high site density, and superior scalability. The optimized catalyst, when integrated as the cathode in a representative proton exchange membrane fuel cell (PEMFC) system, delivers remarkable power densities of 0.70 W cm-2 and 0.39 W cm-2 in O2 and air conditions, respectively, outperforming most reported Co-based catalysts. This work establishes a generalizable and environmentally sustainable route for the large-scale production of high-performance non-precious metal electrocatalysts, advancing PEMFC technology and broader electrochemical energy applications.",,OXYGEN REDUCTION REACTION; ACTIVE-SITES; CATALYSTS; CARBON; DURABILITY; NANOFIBERS; ATOMS,OXYGEN REDUCTION REACTION;ACTIVE-SITES;CATALYSTS;CARBON;DURABILITY;NANOFIBERS;ATOMS,dsxia@fosu.edu.cn; minchen1981@126.com; lgan@sz.tsinghua.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,,,,,English,EES CATAL,Article; Early Access,WoS,Chemistry,WOS:001584903000001,2-s2.0-105018755383,China;Germany,fosu.edu.cn,Foshan Univ;Yunfu Ind Technol Res Inst New Energy & New Mat;Rhein Westfal TH Aachen;Univ Bayreuth;Chinese Acad Sci;Tsinghua Univ,"Foshan Univ, China;Yunfu Ind Technol Res Inst New Energy & New Mat, China;Rhein Westfal TH Aachen, Germany;Univ Bayreuth, Germany;Chinese Acad Sci, China;Tsinghua Univ, China","Huo, Jiaheng; Jiang, Wulyu; Xia, Lu; Gomes, Bruna Ferreira; Zhao, Yunxing; Wei, Yinping; Zhu, Xuya; Xia, Dongsheng; Chen, Min; Gan, Lin"
"Xiao, F., Liu, X., Sun, C.J., Hwang, I.H., Wang, Q., Xu, Z.W., Wang, Y.A., Zhu, S.Q., Wu, H.W., Wei, Z.D., Zheng, L.P., Cheng, D.J., Gu, M., Xu, G.L., Amine, K., Shao, M.H.",Solid-State Synthesis of Highly Dispersed Nitrogen-Coordinated Single Iron Atom Electrocatalysts for Proton Exchange Membrane Fuel Cells,2021,NANO LETTERS,21,8,,3633,3639,7,47,10.1021/acs.nanolett.1c00702,,"[Xiao, Fei; Xu, Zhiwen; Wang, Yian; Zhu, Shangqian; Wu, Hsi-wen; Shao, Minhua] Hong Kong Univ Sci & Technol, Dept Chem & Biol Engn, Kowloon, Hong Kong, Peoples R China; [Liu, Xiang; Xu, Gui-Liang; Amine, Khalil] Argonne Natl Lab, Chem Sci & Engn Div, Lemont, IL 60439 USA; [Sun, Cheng-Jun; Hwang, Inhui] Argonne Natl Lab, Xray Sci Div, Lemont, IL 60439 USA; [Hwang, Inhui] Jeonbuk Natl Univ, Dept Phys Educ, Jeonju 54896, South Korea; [Hwang, Inhui] Jeonbuk Natl Univ, Inst Fus Sci, Jeonju 54896, South Korea; [Wang, Qi; Gu, Meng] South Univ Sci & Technol China, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China; [Wei, Zidong] Chongqing Univ, Coll Chem & Chem Engn, Chongqing 400044, Peoples R China; [Zheng, Liping] Fujian Yanan Power Co Ltd, Dept Res & Dev, Ningde 352100, Peoples R China; [Cheng, Daojian] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China; [Cheng, Daojian] Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, Beijing 100029, Peoples R China; [Amine, Khalil] Stanford Univ, Mat Sci & Engn, Stanford, CA 94305 USA; [Amine, Khalil] Imam Abdulrahman Bin Faisal Univ IAU, Inst Res & Med Consultat IRMC, Dammam 34221, Saudi Arabia; [Shao, Minhua] Hong Kong Univ Sci & Technol, Fok Ying Tung Res Inst, Dept Chem & Biol Engn, Kowloon, Guangzhou 511458, Peoples R China; [Shao, Minhua] Hong Kong Univ Sci & Technol, Energy Inst, Kowloon, Hong Kong, Peoples R China",,"Fe-N-C with atomically dispersed Fe single atoms is the most promising candidate to replace platinum for the oxygen reduction reaction (ORR) in fuel cells. However, the conventional synthesis procedures require quantities solvents and metal precursors, sluggish adsorption process, and tedious washing, resulting in limited metal doping and uneconomical for large-scale production. For the first time, Fe2O3 is adopted as the Fe precursor to derive abundant single Fe atoms dispersed on carbon surfaces. The Fe-N-C catalyst synthesized by this simple method shows an excellent ORR activity with half-wave potentials of 0.82 and 0.90 V in acidic and alkaline solutions, respectively. A single fuel cell with an optimized Fe-N-C cathode shows a high peak power density of 0.84 W cm(-2). The solid-state transformation synthesis method developed in this study may shed light on mass production of single-atom-based catalysts.",Metal organic framework; solid-state transformation; single-atom catalyst; proton exchange membrane fuel cell,OXYGEN REDUCTION REACTION; METAL-ORGANIC FRAMEWORKS; PT-FREE CATALYST; CARBON; SITES; GRAPHENE; IDENTIFICATION; PERFORMANCE; STABILITY; SHELL,Metal organic framework;solid-state transformation;single-atom catalyst;proton exchange membrane fuel cell;OXYGEN REDUCTION REACTION;METAL-ORGANIC FRAMEWORKS;PT-FREE CATALYST;CARBON;SITES;GRAPHENE;IDENTIFICATION;PERFORMANCE;STABILITY;SHELL,xug@anl.gov; amine@anl.gov; kemshao@ust.hk,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1530-6984,,,33872030,English,NANO LETT,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000645560000038,2-s2.0-85105116388,China;United States;South Korea;Saudi Arabia,anl.gov,Hong Kong Univ Sci & Technol;Argonne Natl Lab;Jeonbuk Natl Univ;South Univ Sci & Technol China;Chongqing Univ;Fujian Yanan Power Co Ltd;Beijing Univ Chem Technol;Stanford Univ;Imam Abdulrahman Bin Faisal Univ IAU,"Hong Kong Univ Sci & Technol, China;Argonne Natl Lab, United States;Jeonbuk Natl Univ, South Korea;South Univ Sci & Technol China, China;Chongqing Univ, China;Fujian Yanan Power Co Ltd, China;Beijing Univ Chem Technol, China;Stanford Univ, United States;Imam Abdulrahman Bin Faisal Univ IAU, Saudi Arabia","Xiao, Fei; Liu, Xiang; Sun, Cheng-Jun; Hwang, Inhui; Wang, Qi; Xu, Zhiwen; Wang, Yian; Zhu, Shangqian; Wu, Hsi-wen; Wei, Zidong; Zheng, Liping; Cheng, Daojian; Gu, Meng; Xu, Gui-Liang; Amine, Khalil; Shao, Minhua"
"Chen, L., Wan, X., Zhao, X.N., Li, W.W., Liu, X.F., Zheng, L.R., Liu, Q.T., Yu, R.H., Shui, J.L.",Spatial porosity design of Fe-N-C catalysts for high power density PEM fuel cells and detection of water saturation of the catalyst layer by a microwave method,2022,JOURNAL OF MATERIALS CHEMISTRY A,10,14,,7764,7772,9,23,10.1039/d1ta09140a,,"[Chen, Lu; Wan, Xin; Zhao, Xiaonan; Li, Wenwen; Liu, Xiaofang; Liu, Qingtao; Yu, Ronghai; Shui, Jianglan] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China; [Zheng, Lirong] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China",,"The porous structure is essential for non-precious metal catalysts (NPMCs) to achieve high utilization of active sites and efficient mass transfer in proton exchange membrane fuel cells (PEMFCs). Here, submicron Fe-N-C catalyst particles with three representative types of micropore/mesopore distributions are prepared to investigate the effects of the spatial porosity of the catalyst on fuel cell performance. A microwave detection method is used to monitor the water saturation in the catalyst layer. The structure of the mesoporous surface/microporous core is demonstrated to be the optimal spatial porosity, and the related Fe-N-C catalyst achieves a high PEMFC power density of 1.08 W cm(-2) under only 1.5 bar H-2-O-2. By comparison with fully microporous and fully mesoporous particles, it is found that the mesoporous surface has advantages in improving the number, accessibility, and utilization of active sites, while the microporous core enables the catalyst to avoid the core flooding that occurs in fully mesoporous particles. This study identifies the optimal porosity of NPMCs and proposed a microwave detection method to analyze the water saturation in the electrodes.",,OXYGEN REDUCTION REACTION; ACTIVE-SITES; METAL-CATALYSTS; MASS-TRANSPORT; ELECTROCATALYSTS; CATHODE,OXYGEN REDUCTION REACTION;ACTIVE-SITES;METAL-CATALYSTS;MASS-TRANSPORT;ELECTROCATALYSTS;CATHODE,liuxf05@buaa.edu.cn; shuijianglan@buaa.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000765408000001,2-s2.0-85127046287,China,buaa.edu.cn,Beihang Univ;Chinese Acad Sci,"Beihang Univ, China;Chinese Acad Sci, China","Chen, Lu; Wan, Xin; Zhao, Xiaonan; Li, Wenwen; Liu, Xiaofang; Zheng, Lirong; Liu, Qingtao; Yu, Ronghai; Shui, Jianglan"
"Zheng, T., Wang, J.C., Xia, Z.H., Wang, G.F., Duan, Z.Y.",Spin-dependent active centers in Fe-N-C oxygen reduction catalysts revealed by constant-potential density functional theory,2023,JOURNAL OF MATERIALS CHEMISTRY A,11,36,,19360,19373,14,35,10.1039/d3ta03271j,,"[Zheng, Tao; Wang, Jincheng; Duan, Zhiyao] Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China; [Xia, Zhenhai] Univ New South Wales, Sch Chem Engn, Sydney, NSW 2052, Australia; [Wang, Guofeng] Univ Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15261 USA",,"Iron and nitrogen co-doped carbon (Fe-N-C) catalysts have shown great promise in promoting the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells. Experimental characterization studies, including Mossbauer and X-ray emission spectroscopy, have revealed the crucial role of spin states in Fe-N-C catalysts in ORR catalysis, but comprehensive theoretical understanding in this aspect is still lacking. Herein, using the grand-canonical density functional theory, we systematically investigate the interplay of the oxidation state, spin state, and applied potentials on the catalytic activity of an FeN4C10 moiety. We have identified two stable spin states of Fe(ii)N4C10 at ORR-relevant potentials, namely, a high-spin state with out-of-plane Fe displacement and an in-plane intermediate-spin state. Our results show that the FeN4C10 moiety at the two different spin states exhibits distinct abilities to bind ORR intermediates and ORR activities. Our study provides valuable insights into the spin-correlated catalytic performances of Fe-N-C catalysts.",,SINGLE-ATOM CATALYSTS; FUEL-CELLS; SITES; IDENTIFICATION; ELECTROCATALYSTS; APPROXIMATION; GRAPHENE; ORR,SINGLE-ATOM CATALYSTS;FUEL-CELLS;SITES;IDENTIFICATION;ELECTROCATALYSTS;APPROXIMATION;GRAPHENE;ORR,guw8@pitt.edu; zhiyao.duan@nwpu.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:001042156900001,2-s2.0-85168840626,China;Australia;United States,pitt.edu,Northwestern Polytech Univ;Univ New South Wales;Univ Pittsburgh,"Northwestern Polytech Univ, China;Univ New South Wales, Australia;Univ Pittsburgh, United States","Zheng, Tao; Wang, Jincheng; Xia, Zhenhai; Wang, Guofeng; Duan, Zhiyao"
"Liu, Y., Chen, Y., Mu, X., Wu, Z., Jin, X., Li, J., Xu, Y., Yang, L., Xi, X., Jang, H., Lei, Z., Liu, Q., Jiao, S., Yan, P., Li, X., Cao, R.",Spinel-Anchored Iridium Single Atoms Enable Efficient Acidic Water Oxidation via Intermediate Stabilization Effect,2023,ACS Catalysis,13,6,,3757,3767,,86,10.1021/acscatal.2c05940,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85149476687&doi=10.1021%2Facscatal.2c05940&partnerID=40&md5=e993a453aa8adf5a59a13473a3ee5fd1,"Department of Materials Science and Engineering, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Beijing University of Technology, Beijing, China; Research Center of New Energy, Research Institute of Petroleum Exploration and Development, Beijing, China; National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, China; Institutes of Physical Science and Information Technology, Anhui University, Hefei, Anhui, China; Department of Advanced Materials Engineering, Chung-Ang University, Seoul, South Korea; University of Science and Technology of China, Hefei, Anhui, China; Songshan Lake Materials Laboratory, Dongguan, Guangdong, China","Liu, Yang, Department of Materials Science and Engineering, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Chen, Yawei, Department of Materials Science and Engineering, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Mu, Xulin, Beijing University of Technology, Beijing, China; Wu, Zhongyi, Department of Materials Science and Engineering, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Jin, Xu, Research Center of New Energy, Research Institute of Petroleum Exploration and Development, Beijing, China; Li, Jianming, Research Center of New Energy, Research Institute of Petroleum Exploration and Development, Beijing, China; Xu, Yanzhi, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, China; Yang, Li, Institutes of Physical Science and Information Technology, Anhui University, Hefei, Anhui, China; Xi, Xiaoke, Department of Materials Science and Engineering, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Jang, Haeseong Sung, Department of Advanced Materials Engineering, Chung-Ang University, Seoul, South Korea; Lei, Zhanwu, Department of Materials Science and Engineering, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Liu, Qinghua, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, China; Jiao, Shuhong, Department of Materials Science and Engineering, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Yan, Pengfei, Beijing University of Technology, Beijing, China; Li, Xiyu, University of Science and Technology of China, Hefei, Anhui, China, Songshan Lake Materials Laboratory, Dongguan, Guangdong, China; Cao, Ruiguo, Department of Materials Science and Engineering, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China","Iridium oxide is considered the only practical catalyst for oxygen evolution reaction (OER) in commercial proton exchange membrane (PEM) electrolyzers. However, its low activity and high cost greatly hinder the large-scale development of PEM electrolyzers for hydrogen production. Herein, we report atomically dispersed Ir atoms incorporated into a spinel Co<inf>3</inf>O<inf>4</inf> lattice as an acidic OER catalyst, which exhibits excellent activity and stability for water oxidation. The catalyst significantly lowers the overpotential down to 226 mV at 10 mA cm-2 with an ultrahigh turnover frequency value of 3.15 s-1 (η = 300 mV), 3 orders of magnitude higher than that of commercial IrO<inf>2</inf>. Meanwhile, the catalyst shows superior corrosion resistance in an acidic OER condition, reaching a lifespan of up to 500 h at 10 mA cm-2. First-principles calculations reveal that the key *OOH intermediate can be stabilized by the lattice oxygen coordinated to the Ir active site via hydrogen bond formation, which substantially regulates the rate-limiting step and lowers the activation free energy of the OER process. This work demonstrates a strategy for improving the OER activity of Ir-based catalysts and provides insights into the regulation of the reaction mechanism. © 2023 American Chemical Society.",acidic oxygen evolution reaction; electrochemical water splitting; intermediate stabilization; single-atom catalysts; spinel,Activation energy; Atoms; Catalyst activity; Corrosion resistance; Free energy; Hydrogen bonds; Hydrogen production; Proton exchange membrane fuel cells (PEMFC); Reaction intermediates; Stabilization; Acidic oxygen evolution reaction; Electrochemical water splitting; Electrochemicals; Intermediate stabilization; Single-atom catalyst; Single-atoms; Spinel; Water oxidation; Water splitting; ]+ catalyst; Oxygen,acidic oxygen evolution reaction;electrochemical water splitting;intermediate stabilization;single-atom catalysts;spinel;Activation energy;Atoms;Catalyst activity;Corrosion resistance;Free energy;Hydrogen bonds;Hydrogen production;Proton exchange membrane fuel cells (PEMFC);Reaction intermediates;Stabilization;Electrochemicals;Single-atom catalyst;Single-atoms;Water oxidation;Water splitting;]+ catalyst;Oxygen,"Z. Lei; Hefei National Laboratory for Physical Science at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China; email: zwlei@mail.ustc.edu.cn; X. Li; University of Science and Technology of China, Hefei, 230026, China; email: xylizy@ustc.edu.cn; R. Cao; Hefei National Laboratory for Physical Science at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China; email: rgcao@ustc.edu.cn",,,,,,American Chemical Society,21555435,,ACCAC,,English,ACS Catal.,Article,Scopus,,2-s2.0-85149476687,,China;South Korea,mail.ustc.edu.cn,,,"Liu, Y.; Chen, Y.; Mu, X.; Wu, Z.; Jin, X.; Li, J.; Xu, Y.; Yang, L.; Xi, X.; Jang, H.; Lei, Z.; Liu, Q.; Jiao, S.; Yan, P.; Li, X.; Cao, R."
"Du, C.Y., Ge, Z.Q., Ouyang, L.H., Xu, H.Y., Ma, H.Y., Wang, X.T., Liu, Z.Q.",Spin-Matching Effect Triggering Enhanced Oxygen Reduction Reaction in Acidic and Alkaline Media,2025,Angewandte Chemie - International Edition,,,,,,,0,10.1002/anie.202515517,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105021541926&doi=10.1002%2Fanie.202515517&partnerID=40&md5=ed8e6c16f6edf97d903ebc445ce54dd3,"School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials/Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou, Guangdong, China; School of Chemistry, South China Normal University, Guangzhou, Guangdong, China","Du, Congyi, School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials/Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou, Guangdong, China; Ge, Ziqi, School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials/Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou, Guangdong, China; Ouyang, Lv Hao, School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials/Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou, Guangdong, China; Xu, Hongyi, School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials/Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou, Guangdong, China; Ma, Hua Ying, School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials/Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou, Guangdong, China; Wang, Xiaotong, School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials/Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou, Guangdong, China; Liu, Zhaoqing, School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials/Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou, Guangdong, China, School of Chemistry, South China Normal University, Guangzhou, Guangdong, China","The development of high-performance oxygen reduction reaction (ORR) electrocatalysts operable across broad pH ranges is hindered by strong adsorption of hydroxyl intermediates (*OH). This work introduces a conceptually novel strategy of spin-state modulation via interfacial engineering to regulate platinum nanocrystals anchored on atomically dispersed Fe-N-C substrates (Pt/Fe<inf>SA</inf>-NC). Based on density functional theory (DFT) predictions, we construct a spin-state-tunable architecture by precisely controlling Pt particle size (2–8 nm), which induces spin-matching effects that effectively mitigate *OH over-binding in pH-dependent ORR path. Mechanistic studies indicate that the synergy between FeN<inf>4</inf>-mediated metal-support interactions and size-dependent spin polarization facilitates charge transfer, weakening *OH adsorption and promoting its desorption. In alkaline conditions, ∼2 nm Pt nanoclusters with moderate spin density achieve a peak power density of 179 mW cm−2 in Zn-air batteries with 150 h stability. Under acidic media, ∼8 nm Pt nanoparticles with low-spin configuration deliver a mass activity of 0.65 A mg<inf>Pt</inf>−1 and a peak power density of 730 mW cm−2 in proton-exchange membrane fuel cells (PEMFCs), outperforming commercial Pt/C and retaining 90% activity after 3000 cycles. This finding provides a spin-engineering paradigm for designing advanced electrocatalysts with ultralow Pt loading. © 2025 Wiley-VCH GmbH.",d-Orbit regulation; Metal-support interaction; Oxygen reduction reaction; Platinum-based catalyst; Spin effect,Alkalinity; Binary alloys; Density functional theory; Design for testability; Electrocatalysts; Electrolytic reduction; Nanoclusters; Oxygen; Oxygen reduction reaction; Platinum; Platinum compounds; Spin dynamics; Spin polarization; Acidic media; Alkaline media; D-orbit regulation; Matching effects; Metal-support interactions; Peak power densities; Platinum based catalyst; Spin effects; Spin state; Particle size; Reaction intermediates,d-Orbit regulation;Metal-support interaction;Oxygen reduction reaction;Platinum-based catalyst;Spin effect;Alkalinity;Binary alloys;Density functional theory;Design for testability;Electrocatalysts;Electrolytic reduction;Nanoclusters;Oxygen;Platinum;Platinum compounds;Spin dynamics;Spin polarization;Acidic media;Alkaline media;Matching effects;Metal-support interactions;Peak power densities;Platinum based catalyst;Spin effects;Spin state;Particle size;Reaction intermediates,"X.-T. Wang; School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials/Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou, 510006, China; email: wangxt77@gzhu.edu.cn; Z.-Q. Liu; School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials/Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou, 510006, China; email: lzqgzu@gzhu.edu.cn",,,,,,John Wiley and Sons Inc,14337851,,ACIEF,,English,Angew. Chem. Int. Ed.,Article,Scopus,,2-s2.0-105021541926,,China,gzhu.edu.cn,,,"Du, C.-Y.; Ge, Z.-Q.; Ouyang, L.-H.; Xu, H.-Y.; Ma, H.-Y.; Wang, X.-T.; Liu, Z.-Q."
"Sun, F., Li, F., Tang, Q.",Spin State as a Participator for Demetalation Durability and Activity of Fe-N-C Electrocatalysts,2022,Journal of Physical Chemistry C,126,31,,13168,13181,,28,10.1021/acs.jpcc.2c03518,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85135985639&doi=10.1021%2Facs.jpcc.2c03518&partnerID=40&md5=9504ca85a9f5cb450e197538d614eb2c,"Chongqing University, Chongqing, China","Sun, Fang, Chongqing University, Chongqing, China; Li, Fuhua, Chongqing University, Chongqing, China; Tang, Qing, Chongqing University, Chongqing, China","While pyrolyzed Fe-N-C single-atom materials have exhibited encouraging oxygen reduction reaction (ORR) activity in proton exchange fuel cells (PEFCs), their activity origin remains a puzzle and their operando degradation greatly restricts practical applications. A major problem lies in that the spin state of the active center has been largely neglected. Herein, we systematically examined the effect of spin state on the demetalation durability and ORR activity of Fe-N-C electrocatalysts, where two kinds of FeN<inf>4</inf>clusters, pyridinic-type FeN<inf>4</inf>C<inf>10</inf>and pyrrolic-type FeN<inf>4</inf>C<inf>12</inf>, are considered. The computed Pourbaix diagrams and catalytic activity indicate that the low-spin pyridinic-type FeN<inf>4</inf>with OH modification [OH-Fe(II)N<inf>4</inf>C<inf>10</inf>(S = 0)] and the medium-spin pyridinic-type FeN<inf>4</inf>with O<inf>2</inf>modification [O<inf>2</inf>-Fe(II)N<inf>4</inf>C<inf>10</inf>(S = 1)] have excellent acid durability and high activity toward ORR. Particularly, the thermodynamic limiting potential (0.91 V) predicted on [OH-Fe(II)N<inf>4</inf>C<inf>10</inf>(S = 0)] shows great agreement with the experimentally confirmed ones ranging from 0.86 to 0.96 V<inf>RHE</inf>. The high-spin pyrrolic-type OH-Fe(III)N<inf>4</inf>C<inf>12</inf>(S = 5/2) also exhibits impressive 4e-ORR activity but has poor stability in acids. The feature importance analysis showed that the catalytic activity and the adsorption strength of oxygenated intermediates are highly correlated with the intrinsic charges and electronic spin moments of the catalytic center. Furthermore, we found that the applied potential may induce a spin crossover in the active center since each spin state responds differently to the electric field. Our studies advance the understanding of the fundamentals of the FeN<inf>4</inf>structure-activity correlation and aid the rational design of highly active and stable Fe-N-C electrocatalysts. © 2022 American Chemical Society. All rights reserved.",,Catalyst activity; Durability; Electric fields; Electrocatalysts; Electrolysis; Electrolytic reduction; Electrospinning; Proton exchange membrane fuel cells (PEMFC); Spin dynamics; Active center; Demetalation; OH -; Oxygen reduction reaction; Proton exchange fuel cells; Pyridinic; Pyrrolic; Reaction activity; Single-atoms; Spin state; Iron compounds,Catalyst activity;Durability;Electric fields;Electrocatalysts;Electrolysis;Electrolytic reduction;Electrospinning;Proton exchange membrane fuel cells (PEMFC);Spin dynamics;Active center;Demetalation;OH -;Oxygen reduction reaction;Proton exchange fuel cells;Pyridinic;Pyrrolic;Reaction activity;Single-atoms;Spin state;Iron compounds,"Q. Tang; School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing, 401331, China; email: qingtang@cqu.edu.cn",,,,,,American Chemical Society,19327447,,,,English,J. Phys. Chem. C,Article,Scopus,,2-s2.0-85135985639,,China,cqu.edu.cn,,,"Sun, F.; Li, F.; Tang, Q."
"Santos, K.T., Kumar, K., Dubau, L., Ge, H., Berthon-Fabry, S., Vasconcellos, C.S.A., Lima, F.H.B., Asset, T., Atanassov, P., Savel'eva, V.A., Glatzel, P., Li, X., Jaouen, F., Maillard, F.",Spontaneous aerobic ageing of Fe–N–C materials and consequences on oxygen reduction reaction kinetics,2023,Journal of Power Sources,564,,232829,,,,15,10.1016/j.jpowsour.2023.232829,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85148771528&doi=10.1016%2Fj.jpowsour.2023.232829&partnerID=40&md5=fc148016c97ffbe97a141b3c7f29dbe0,"Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Centre for Processes, Centre Procédés, Energies Renouvelables et Systèmes Energétiques, Sophia Antipolis, Provence-Alpes-Cote d'Azur, France; Universidade de São Paulo, Sao Paulo, SP, Brazil; University of California, Irvine, Irvine, CA, United States; European Synchrotron Radiation Facility, Grenoble, Auvergne-Rhone-Alpes, France; CNRS Centre National de la Recherche Scientifique, Paris, Ile-de-France, France; Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France","Santos, Keyla Teixeira, Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Kumar, Kavita, Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Dubau, Laetitia, Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France; Ge, Hongxin, Centre for Processes, Centre Procédés, Energies Renouvelables et Systèmes Energétiques, Sophia Antipolis, Provence-Alpes-Cote d'Azur, France; Berthon-Fabry, Sandrine, Centre for Processes, Centre Procédés, Energies Renouvelables et Systèmes Energétiques, Sophia Antipolis, Provence-Alpes-Cote d'Azur, France; Vasconcellos, Cídia S.A., Universidade de São Paulo, Sao Paulo, SP, Brazil; Lima, Fabio H.B., Universidade de São Paulo, Sao Paulo, SP, Brazil; Asset, Tristan, University of California, Irvine, Irvine, CA, United States; Atanassov, Plamen B., University of California, Irvine, Irvine, CA, United States; Savel’eva, Viktoriia A., European Synchrotron Radiation Facility, Grenoble, Auvergne-Rhone-Alpes, France; Glatzel, Pieter, European Synchrotron Radiation Facility, Grenoble, Auvergne-Rhone-Alpes, France; Li, Xiaoyan, CNRS Centre National de la Recherche Scientifique, Paris, Ile-de-France, France; Jaouen, Frédéric, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Maillard, Frédéric M., Université Grenoble Alpes, Saint Martin d'Heres, Auvergne-Rhone-Alpes, France","Tremendous progress in the beginning-of-life oxygen reduction reaction (ORR) activity of iron nitrogen carbon (Fe–N–C) catalysts holds the promise to replace platinum-group metals in proton exchange membrane fuel cells cathode. Improving the understanding of their degradation mechanisms as well as their practical durability are the next two grand challenges. Here, we report on a spontaneous aerobic degradation phenomenon of Fe–N–C materials that takes place upon storage under atmospheric conditions (air, room temperature), and depreciates their electrocatalytic activity towards the ORR. Our study covers a period of 47 months and involves six catalysts, which were synthesized by different laboratories and different methods (sacrificial metal organic framework, silica templating, aerogel-derived, wet impregnation of high surface area carbon black) and which feature distinct morphology, structure and density of active sites. The results from electron and X-ray based techniques indicate that a fraction of the single Fe atoms spontaneously transforms into Fe or Fe-oxide aggregates over time, in line with the decrease in the active site density measured by in situ nitrite stripping. Along with these structural changes, a strong decrease in ORR turnover frequency was also observed. These adverse effects can be mitigated using storage under dry and oxygen-free atmosphere. © 2023 Elsevier B.V.",Carbon corrosion; Fe demetalation; Fe–N–C electrocatalysts; Mitigation strategy; Oxygen reduction reaction; Stability,Catalyst activity; Corrosion; Degradation; Electrolytic reduction; Iron oxides; Morphology; Organometallics; Oxygen; Proton exchange membrane fuel cells (PEMFC); Reaction kinetics; Silica; Beginning of lives; Carbon corrosion; Demetalation; Fe demetalation; Fe–N–C electrocatalyst; Mitigation strategy; Oxygen reduction reaction; Oxygen reduction reaction kinetics; Reaction activity; ]+ catalyst; Electrocatalysts,Carbon corrosion;Fe demetalation;Fe–N–C electrocatalysts;Mitigation strategy;Oxygen reduction reaction;Stability;Catalyst activity;Corrosion;Degradation;Electrolytic reduction;Iron oxides;Morphology;Organometallics;Oxygen;Proton exchange membrane fuel cells (PEMFC);Reaction kinetics;Silica;Beginning of lives;Demetalation;Fe–N–C electrocatalyst;Oxygen reduction reaction kinetics;Reaction activity;]+ catalyst;Electrocatalysts,"F. Maillard; Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, Grenoble, 38000, France; email: frederic.maillard@grenoble-inp.fr",,,,,,Elsevier B.V.,03787753,0444894810,JPSOD,,English,J Power Sources,Article,Scopus,,2-s2.0-85148771528,,France;Brazil;United States,grenoble-inp.fr,,,"Santos, K.T.; Kumar, K.; Dubau, L.; Ge, H.; Berthon-Fabry, S.; Vasconcellos, C.S.A.; Lima, F.H.B.; Asset, T.; Atanassov, P.; Savel'eva, V.A.; Glatzel, P.; Li, X.; Jaouen, F.; Maillard, F."
"Glibin, V.P., Dodelet, J.P., Zhang, G.X.",Spontaneous Demetallation of Mn(II)N x  Catalytic Sites in Proton Exchange Membrane Fuel Cell Conditions,2023,ACS CATALYSIS,14,1,,330,343,14,5,10.1021/acscatal.3c04310,,"[Glibin, Vassili P.] Univ Western Ontario, Dept Chem & Biochem Engn, London, ON N6A 5B9, Canada; [Dodelet, Jean-Pol] Inst Natl Rech Sci INRS, Ctr Energie Materiaux Telecommun, Varennes, PQ J3X 1P7, Canada; [Zhang, Gaixia] Ecole Technol Super ETS, Dept Elect Engn, Montreal, PQ H3C 1K3, Canada",,"The present work is about a thermodynamic assessment of the stability behavior of several (MnNx)-N-(II)- and (MnNx)-N-(III)/C active sites in Mn/N/C catalysts at 298 and 353 K (80 degrees C) in the acidic environment of proton exchange membrane (PEM) fuel cells. The calculated Gibbs free energies for the manganese ion leaching reaction indicate that all (MnNx)-N-(II) active sites considered in this work are unstable in these conditions. However, the opposite is observed when a three-valent state is adopted for the Mn ion. The transition of manganese from the divalent to the trivalent state is accompanied by the addition of an axial ligand (particularly, by an O-2 molecule). The adsorption of an O-2 molecule to the metal ion of the sites to obtain O-2<middle dot><middle dot><middle dot>(MnN4)-N-(III)/C, O-2<middle dot><middle dot><middle dot>(MnN(2+2))-N-(III)/C, or O-2<middle dot><middle dot><middle dot>(MnN(4+2))-N-(III)/C leads to highly resisting sites to acid leaching at 298 and 353 K. The thermodynamic stability toward acid leaching is also analyzed for the de-oxygenated (MnN4)-N-(III)/C, (MnN(2+2))-N-(III)/C, and (MnN(4+2))-N-(III)/C sites. Such sites are also rather stable toward demetallation. In addition, the importance of other aspects (Fenton reaction, electrochemical functionalization/corrosion) affecting the stability of Mn/N/C and Fe/N/C catalysts is also discussed. From this discussion, it is concluded that, contrary to demetallation and also to electro-functionalization/oxidation, Fenton reaction is not an important cause of instability either for Mn/N/C or for Fe/N/C cathode catalysts in fuel cells.",manganese-based active catalysts; oxygen reduction reaction; thermodynamic stability in acid; iron-based active catalysts; Fenton reaction,OXYGEN REDUCTION REACTION; IRON-BASED CATALYSTS; N-C CATALYSTS; ACTIVE-SITES; STABILITY; METAL; ELECTROREDUCTION; DURABILITY; CARBON; ELECTROCATALYSTS,manganese-based active catalysts;oxygen reduction reaction;thermodynamic stability in acid;iron-based active catalysts;Fenton reaction;IRON-BASED CATALYSTS;N-C CATALYSTS;ACTIVE-SITES;STABILITY;METAL;ELECTROREDUCTION;DURABILITY;CARBON;ELECTROCATALYSTS,vassili.glibin@gmail.com; jean-pol.dodelet@inrs.ca; gaixia.zhang@etsmtl.ca,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,2155-5435,,,,English,ACS CATAL,Article,WoS,Chemistry,WOS:001137559500001,2-s2.0-85181059992,Canada,gmail.com,Univ Western Ontario;Inst Natl Rech Sci INRS;Ecole Technol Super ETS,"Univ Western Ontario, Canada;Inst Natl Rech Sci INRS, Canada;Ecole Technol Super ETS, Canada","Glibin, Vassili P.; Dodelet, Jean-Pol; Zhang, Gaixia"
"Ahluwalia, R.K., Wang, X., Osmieri, L., Peng, J.K., Cetinbas, C.F., Park, J.H., Myers, D.J., Chung, H.T., Neyerlin, K.C.",Stability of Atomically Dispersed Fe-N-C ORR Catalyst in Polymer Electrolyte Fuel Cell Environment,2021,Journal of the Electrochemical Society,168,2,024513,,,,17,10.1149/1945-7111/abe34c,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85101882280&doi=10.1149%2F1945-7111%2Fabe34c&partnerID=40&md5=a6bc56d77e0d4d32b8388967fae2ed5d,"Argonne National Laboratory, Lemont, IL, United States; National Renewable Energy Laboratory, Golden, CO, United States; Los Alamos National Laboratory, Los Alamos, NM, United States","Ahluwalia, Rajesh K., Argonne National Laboratory, Lemont, IL, United States; Wang, Xiaohua, Argonne National Laboratory, Lemont, IL, United States; Osmieri, Luigi, National Renewable Energy Laboratory, Golden, CO, United States; Peng, Juikun, Argonne National Laboratory, Lemont, IL, United States; Cetinbas, C. Firat, Argonne National Laboratory, Lemont, IL, United States; Park, Jaehyung, Argonne National Laboratory, Lemont, IL, United States; Myers, Deborah J., Argonne National Laboratory, Lemont, IL, United States; Chung, Hoon Taek, Los Alamos National Laboratory, Los Alamos, NM, United States; Neyerlin, Kenneth C., National Renewable Energy Laboratory, Golden, CO, United States","We have investigated the durability of a platinum group metal (PGM-)free Fe-N-C catalyst in which the Fe sites are atomically dispersed (AD), and found it to be quite stable in standard accelerated stress test (AST) cycles normally used for low-PGM catalysts: a square wave with 0.6 V lower potential limit (LPL) - 0.95 V upper potential limit (UPL) with 3-s holds at UPL and LPL in H2/N2, at 1.5 atm, 80 C and 100% RH. Considering the metrics normally employed to characterize the durability of the low-PGM catalysts after 30,000 AST cycles, this PGM-free catalyst lost <50% catalyst activity, <50% H2/air performance at 0.8 V, and 40 mV at 1.5 A cm-2. However, it is less stable in H2/air, losing ∼50% catalyst activity after just 7.5 h of polarization measurements (load cycles). In combined cycles, the majority of the loss in catalyst activity occurred during the load cycles in H2/air rather than AST cycles in H2/N2. We have concluded that, unlike low-PGM catalysts that lose electrochemically active surface area (ECSA) through potential cycling-induced processes, (AD)Fe-N-C catalysts degrade by processes associated with the presence of oxygen. © 2021 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.",,Durability; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Accelerated stress; Combined cycle; Electrochemically active surface areas; Platinum group metals; Polarization measurements; Polymer electrolyte fuel cells; Potential cycling; Potential limits; Catalyst activity,Durability;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Accelerated stress;Combined cycle;Electrochemically active surface areas;Platinum group metals;Polarization measurements;Polymer electrolyte fuel cells;Potential cycling;Potential limits;Catalyst activity,"X. Wang; Argonne National Laboratory, Argonne, 60439, United States; email: x.wang@anl.gov",,,,,,IOP Publishing Ltd,00134651,,JESOA,,English,J Electrochem Soc,Article,Scopus,,2-s2.0-85101882280,,United States,anl.gov,,,"Ahluwalia, R.K.; Wang, X.; Osmieri, L.; Peng, J.-K.; Cetinbas, C.F.; Park, J.H.; Myers, D.J.; Chung, H.T.; Neyerlin, K.C."
"Wan, X., Liu, X.F., Shui, J.L.",Stability of PGM-free fuel cell catalysts: Degradation mechanisms and mitigation strategies,2020,PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL,30,6,,721,731,11,54,10.1016/j.pnsc.2020.08.010,,"[Wan, Xin; Liu, Xiaofang; Shui, Jianglan] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China",,"While Platinum group metals (PGM) free catalysts are promising alternatives to expensive Pt as the cathode catalyst in proton exchange membrane fuel cells, their rapid degradation must be addressed for the commercial feasibility. This review provides a historical survey of the possible degradation mechanisms of PGM-free catalysts. Decades of extensive studies confirm that carbon oxidation and demetalation are primarily responsible for the instability, whereas the mechanisms of protonation and micropore flooding are strongly criticized. Based on the mechanism understanding, the mitigation strategies for improving stability are discussed in detail. Finally, some directions to achieve high-performance and durable PGM-free catalysts are proposed.",Fuel cell; Oxygen reduction; PGM-Free catalysts; Stability; Mitigation strategy,OXYGEN REDUCTION REACTION; N-C CATALYSTS; SINGLE-ATOM CATALYSTS; METAL-ORGANIC-FRAMEWORK; IRON-BASED CATALYSTS; ACTIVE-SITES; FE/N/C-CATALYSTS; CATHODE CATALYSTS; CARBON; FE,Fuel cell;Oxygen reduction;PGM-Free catalysts;Stability;Mitigation strategy;OXYGEN REDUCTION REACTION;N-C CATALYSTS;SINGLE-ATOM CATALYSTS;METAL-ORGANIC-FRAMEWORK;IRON-BASED CATALYSTS;ACTIVE-SITES;FE/N/C-CATALYSTS;CATHODE CATALYSTS;CARBON;FE,shuijianglan@buaa.edu.cn,,"STE 800, 230 PARK AVE, NEW YORK, NY 10169 USA",,,,ELSEVIER SCIENCE INC,1002-0071,,,,English,PROG NAT SCI-MATER,Review,WoS,Materials Science; Science & Technology - Other Topics,WOS:000606589000002,,China,buaa.edu.cn,Beihang Univ,"Beihang Univ, China","Wan, Xin; Liu, Xiaofang; Shui, Jianglan"
"Liu, G., Li, X.G., Popov, B.N.",Stability Study of Nitrogen-Modified Carbon Composite Catalysts for Oxygen Reduction Reaction in Polymer Electrolyte Membrane Fuel Cells,2009,PROTON EXCHANGE MEMBRANE FUEL CELLS 9,25,1,,1251,1259,9,68,10.1149/1.3210680,,"[Liu, Gang; Li, Xuguang; Popov, Branko N.] Univ S Carolina, Dept Chem Engn, Ctr Electrochem Engn, Columbia, SC 29208 USA",,"The objectives of this paper are to evaluate the nature of the active sites, the stability and degradation mechanism of nitrogen-modified carbon composite (NMCC) catalysts for oxygen reduction reaction in polymer electrolyte membrane (PEM) fuel cells. Two NMCC catalysts were synthesized using our previously reported method (ECS Transactions 11 (1) (2007) 241) at pyrolysis temperatures of 800 and 1100 degrees C, respectively. The catalyst pyrolized at 800 degrees C containing pyridinic nitrogen showed higher initial activity but much lower stability due to the protonation reaction in the acidic environment. The catalyst pyrolized at 1100 degrees C mainly containing graphitic (quaternary) nitrogen exhibited good long-term stability. The proposed nitrogen-modified active sites (pyridinic and graphitic nitrogen) for the non-precious metal catalysts can explain both the observed activity and stability of the catalysts.",,FE-BASED CATALYSTS; O-2 REDUCTION; ELECTROCATALYSTS; BLACK; IRON; ADSORPTION; SITE; PEMFCS; PHASE,FE-BASED CATALYSTS;O-2 REDUCTION;ELECTROCATALYSTS;BLACK;IRON;ADSORPTION;SITE;PEMFCS;PHASE,,"Fuller, T; Uchida, H; Strasser, P; Shirvanian, P; Lamy, C; Hartnig, C; Gasteiger, HA; Zawodzinski, T; Jarvi, T; Bele, P; Ramani, V; Cleghorn, S; Jones, D; Zelenay, P","65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA",9th Proton Exchange Membrane Fuel Cell Symposium (PEMFC) Conducted Under the Auspices of the 216th Meeting of the Electrochemical-Society-Inc,"Vienna, AUSTRIA","OCT 04-09, 2009",ELECTROCHEMICAL SOC INC,1938-5862,978-1-60768-088-8,,,English,ECS TRANSACTIONS,Proceedings Paper,WoS,Electrochemistry; Energy & Fuels,WOS:000329585500127,2-s2.0-77649265801,United States,No email,Univ S Carolina,"Univ S Carolina, United States","Liu, Gang; Li, Xuguang; Popov, Branko N."
"Mechler, A.K., Sahraie, N.R., Armel, V., Zitolo, A., Sougrati, M.T., Schwammlein, J.N., Jones, D., Jaouen, F.",Stabilization of iron-based fuel cell catalysts by non-catalytic platinum,2018,Journal of the Electrochemical Society,165,13,,F1084,F1091,,39,10.1149/2.0721813jes,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85060874245&doi=10.1149%2F2.0721813jes&partnerID=40&md5=34e58926f7b62ed2833b054ed7a31072,"CNRS Centre National de la Recherche Scientifique, Paris, Ile-de-France, France; SOLEIL Synchrotron, Gif-sur-Yvette, France; Chair of Technical Electrochemistry, Technische Universität München, Munich, Bayern, Germany; Department of Heterogeneous Reactions, Max Planck Institute for Chemical Energy Conversion, Mulheim an der Ruhr, Nordrhein-Westfalen, Germany","Mechler, Anna K., CNRS Centre National de la Recherche Scientifique, Paris, Ile-de-France, France, Department of Heterogeneous Reactions, Max Planck Institute for Chemical Energy Conversion, Mulheim an der Ruhr, Nordrhein-Westfalen, Germany; Sahraie, Nastaran Ranjbar, CNRS Centre National de la Recherche Scientifique, Paris, Ile-de-France, France; Armel, Vanessa, CNRS Centre National de la Recherche Scientifique, Paris, Ile-de-France, France; Zitolo, Andrea, SOLEIL Synchrotron, Gif-sur-Yvette, France; Sougrati, Moulay T., CNRS Centre National de la Recherche Scientifique, Paris, Ile-de-France, France; Schwämmlein, Jan Nicolas, Chair of Technical Electrochemistry, Technische Universität München, Munich, Bayern, Germany; Jones, Deborah Jacqueline, CNRS Centre National de la Recherche Scientifique, Paris, Ile-de-France, France; Jaouen, Frédéric, CNRS Centre National de la Recherche Scientifique, Paris, Ile-de-France, France","Since a few years, non-precious metal catalysts with iron or cobalt as active centers show sufficient activity to be viable candidates as electrocatalysts for the oxygen reduction reaction (ORR) in polymer electrolyte membrane fuel cells (PEMFC). They can sustain substantial current densities when operated at low potentials. However, their stabilization at high cathode potentials, necessary for high energy efficiency, remains a daunting task. Here an Fe-N-C catalyst is stabilized over the whole potential range through functionalization with minute amounts of platinum. With the addition of 1 to 2 wt% Pt, the present Pt/Fe-N-C hybrid catalysts show a similar current density at 0.8 V than Fe-N-C but are much more stable during operation in PEMFC. Various characterization techniques, including CO stripping, demonstrate that platinum in these hybrid catalysts is ORR-inactive, not only initially but also after the PEMFC potentiostatic test. It is proposed that the present platinum species protects the Fe-based active sites from the ORR by-product H <inf>2</inf> O <inf>2</inf> , or reactive oxygen species produced from its reaction with surface Fe. This proof-of-concept paves the way for a new class of hybrid catalysts, where the activity and stability of Me-N-C catalysts can be independently addressed. © The Author(s) 2018. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License",,C (programming language); Catalyst activity; Electrocatalysts; Electrolytic reduction; Energy efficiency; Fuel cells; Iron; Iron compounds; Oxygen; Platinum; Polyelectrolytes; Stabilization; Surface reactions; Characterization techniques; Fuel cell catalysts; Functionalizations; High energy efficiency; Non-precious metal catalysts; Oxygen reduction reaction; Potentiostatic tests; Reactive oxygen species; Proton exchange membrane fuel cells (PEMFC),C (programming language);Catalyst activity;Electrocatalysts;Electrolytic reduction;Energy efficiency;Fuel cells;Iron;Iron compounds;Oxygen;Platinum;Polyelectrolytes;Stabilization;Surface reactions;Characterization techniques;Fuel cell catalysts;Functionalizations;High energy efficiency;Non-precious metal catalysts;Oxygen reduction reaction;Potentiostatic tests;Reactive oxygen species;Proton exchange membrane fuel cells (PEMFC),,,,,,,Electrochemical Society Inc. ecs@electrochem.org,00134651,,JESOA,,English,J Electrochem Soc,Article,Scopus,,2-s2.0-85060874245,,France;Germany,No email,,,"Mechler, A.K.; Sahraie, N.R.; Armel, V.; Zitolo, A.; Sougrati, M.T.; Schwammlein, J.N.; Jones, D.; Jaouen, F."
"Ma, Q., Jin, H., Zhu, J., Li, Z., Xu, H., Liu, B., Zhang, Z., Ma, J., Mu, S.",Stabilizing Fe–N–C Catalysts as Model for Oxygen Reduction Reaction,2021,Advanced Science,8,23,2102209,,,,192,10.1002/advs.202102209,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85117561328&doi=10.1002%2Fadvs.202102209&partnerID=40&md5=d317950db76c31daccd1810f11ae0496,"Wuhan University of Technology, Wuhan, Hubei, China; Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Foshan, Guangdong, China","Ma, Qianli, Wuhan University of Technology, Wuhan, Hubei, China, Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Foshan, Guangdong, China; Jin, Huihui, Wuhan University of Technology, Wuhan, Hubei, China; Zhu, Jiawei, Wuhan University of Technology, Wuhan, Hubei, China; Li, Zilan, Wuhan University of Technology, Wuhan, Hubei, China; Xu, Hanwen, Wuhan University of Technology, Wuhan, Hubei, China; Liu, Bingshuai, Wuhan University of Technology, Wuhan, Hubei, China; Zhang, Zhiwei, Wuhan University of Technology, Wuhan, Hubei, China; Ma, Jingjing, Wuhan University of Technology, Wuhan, Hubei, China; Mu, Shichun, Wuhan University of Technology, Wuhan, Hubei, China, Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Foshan, Guangdong, China","The highly efficient energy conversion of the polymer-electrolyte-membrane fuel cell (PEMFC) is extremely limited by the sluggish oxygen reduction reaction (ORR) kinetics and poor electrochemical stability of catalysts. Hitherto, to replace costly Pt-based catalysts, non-noble-metal ORR catalysts are developed, among which transition metal–heteroatoms–carbon (TM–H–C) materials present great potential for industrial applications due to their outstanding catalytic activity and low expense. However, their poor stability during testing in a two-electrode system and their high complexity have become a big barrier for commercial applications. Thus, herein, to simplify the research, the typical Fe–N–C material with the relatively simple constitution and structure, is selected as a model catalyst for TM–H–C to explore and improve the stability of such a kind of catalysts. Then, different types of active sites (centers) and coordination in Fe–N–C are systematically summarized and discussed, and the possible attenuation mechanism and strategies are analyzed. Finally, some challenges faced by such catalysts and their prospects are proposed to shed some light on the future development trend of TM–H–C materials for advanced ORR catalysis. © 2021 The Authors. Advanced Science published by Wiley-VCH GmbH",electrocatalysis; fuel cells; oxygen reduction reaction; stability; TM–H–C electrocatalysts,Catalyst activity; Electrocatalysis; Electrocatalysts; Electrolytic reduction; Energy conversion; Oxygen; Polyelectrolytes; Precious metals; Proton exchange membrane fuel cells (PEMFC); Reaction kinetics; Advanced science; Carbon material; Cell-be; Cell/B.E; Cell/BE; Heteroatoms; Oxygen reduction reaction; Oxygen reduction reaction kinetics; Transition metal–heteroatom–carbon electrocatalyst; ]+ catalyst; Stability,electrocatalysis;fuel cells;oxygen reduction reaction;stability;TM–H–C electrocatalysts;Catalyst activity;Electrocatalysts;Electrolytic reduction;Energy conversion;Oxygen;Polyelectrolytes;Precious metals;Proton exchange membrane fuel cells (PEMFC);Reaction kinetics;Advanced science;Carbon material;Cell-be;Cell/B.E;Cell/BE;Heteroatoms;Oxygen reduction reaction kinetics;Transition metal–heteroatom–carbon electrocatalyst;]+ catalyst,"S. Mu; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China; email: msc@whut.edu.cn",,,,,,John Wiley and Sons Inc,,,,34687174,English,Adv. Sci.,Review,Scopus,,2-s2.0-85117561328,,China,whut.edu.cn,,,"Ma, Q.; Jin, H.; Zhu, J.; Li, Z.; Xu, H.; Liu, B.; Zhang, Z.; Ma, J.; Mu, S."
"Bae, S., Park, J., Hwang, Y., Park, J.S., Lee, J., Jeong, B.",Steam activation of Fe-N-C catalyst for advanced power performance of alkaline hydrazine fuel cells,2021,Journal of Energy Chemistry,64,,,276,285,,16,10.1016/j.jechem.2021.04.029,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85108007102&doi=10.1016%2Fj.jechem.2021.04.029&partnerID=40&md5=03cb87112c82ae98b4d62fa0cd7f1f3b,"Research Center for Bioconvergence Analysis, Korea Basic Science Institute, Daejeon, South Korea; School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea; Department of Green Chemical Engineering, Sangmyung University, Jongno-gu, Seoul, South Korea; Gwangju Institute of Science and Technology, Gwangju, South Korea","Bae, Sooan, Research Center for Bioconvergence Analysis, Korea Basic Science Institute, Daejeon, South Korea, School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea; Park, Jihyeon, School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea; Hwang, Yuna, Department of Green Chemical Engineering, Sangmyung University, Jongno-gu, Seoul, South Korea; Park, Jinsoo, Department of Green Chemical Engineering, Sangmyung University, Jongno-gu, Seoul, South Korea; Lee, Jaeyoung, School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea, Gwangju Institute of Science and Technology, Gwangju, South Korea; Jeong, Beomgyun, Research Center for Bioconvergence Analysis, Korea Basic Science Institute, Daejeon, South Korea","Alkaline hydrazine liquid fuel cells (AHFC) have been highlighted in terms of high power performance with non-precious metal catalysts. Although Fe-N-C is a promising non-Pt electrocatalyst for oxygen reduction reaction (ORR), the surface density of the active site is very low and the catalyst layer should be thick to acquire the necessary number of catalytic active sites. With this thick catalyst layer, it is important to have an optimum pore structure for effective reactant conveyance to active sites and an interface structure for faster charge transfer. Herein, we prepare a Fe-N-C catalyst with magnetite particles and hierarchical pore structure by steam activation. The steam activation process significantly improves the power performance of the AHFC as indicated by the lower IR and activation voltage losses. Based on a systematic characterization, we found that hierarchical pore structures improve the catalyst utilization efficiency of the AHFCs, and magnetite nanoparticles act as surface modifiers to reduce the interfacial resistance between the electrode and the ion-exchange membrane. © 2021 Science Press",Alkaline hydrazine fuel cell; Electrocatalyst; Interfacial resistance; Ohmic loss; Oxygen reduction reaction; Steam activation; Surface modifier,Catalyst activity; Charge transfer; Electrocatalysts; Electrolytic reduction; Gas fuel purification; Ion exchange; Ion exchange membranes; Magnetic separation; Magnetite; Magnetite nanoparticles; Pore structure; Proton exchange membrane fuel cells (PEMFC); Steam; Structural optimization; Alkaline hydrazine fuel cell; Alkalines; Electrocatalyst; Interfacial resistances; Ohmic loss; Oxygen reduction reaction; Power performance; Steam activation; Surface modifiers; ]+ catalyst; Chemical activation,Alkaline hydrazine fuel cell;Electrocatalyst;Interfacial resistance;Ohmic loss;Oxygen reduction reaction;Steam activation;Surface modifier;Catalyst activity;Charge transfer;Electrocatalysts;Electrolytic reduction;Gas fuel purification;Ion exchange;Ion exchange membranes;Magnetic separation;Magnetite;Magnetite nanoparticles;Pore structure;Proton exchange membrane fuel cells (PEMFC);Steam;Structural optimization;Alkalines;Interfacial resistances;Power performance;Surface modifiers;]+ catalyst;Chemical activation,"J. Lee; School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, Gwangju, 123 Cheomdangwagi-ro, Buk-gu, 61005, South Korea; email: jaeyoung@gist.ac.kr",,,,,,Elsevier B.V.,20954956,,,,English,J. Energy Chem.,Article,Scopus,,2-s2.0-85108007102,,South Korea,gist.ac.kr,,,"Bae, S.; Park, J.; Hwang, Y.; Park, J.-S.; Lee, J.; Jeong, B."
"Herranz, J., Lefevre, M., Larouche, N., Stansfield, B., Dodelet, J.P.",Step-by-step synthesis of non-noble metal electrocatalysts for O2 reduction under proton exchange membrane fuel cell conditions,2007,JOURNAL OF PHYSICAL CHEMISTRY C,111,51,,19033,19042,10,64,10.1021/jp0764438,,"[Herranz, Juan; Lefevre, Michel; Larouche, Nicholas; Stansfield, Barry; Dodelet, Jean-Pol] INRS Energie, Varennes, PQ J3X 1S2, Canada",,"Fe-based catalysts for O-2 reduction under proton exchange membrane fuel cell conditions were prepared on a commercial N234 carbon black support using both a ""classical"" and a step-by-step procedure to determine if parameters other than microporosity and nitrogen loading of the carbon support are important in the synthesis of Fe/N/C electrocatalysts. The ""classical"" procedure for obtaining Fe/N/C electrocatalysts is to use a single-step synthesis, in which a carbon support loaded with a metal precursor is heat treated at high temperatures (900-950 degrees C) in pure NH3. In the step-by-step procedure, microporosity is first etched into the carbon support followed, if necessary, by the addition of N-bearing functionalities and, last, the loading of the metal precursor. Similar maximum microporous contents can be etched into N234, using either NH3 or O-2 (air). However, unlike O-2 (air), etching with NH3 has the added benefit of creating N-bearing functionalities on the carbon surface. For carbon supports etched in O-2 (air), it is possible to add N-bearing functionalities either by N-2 plasma treatment or by a subsequent, short pyrolysis in NH3. In the case of the multistep procedure, a second heat treatment is essential for activating the catalytic sites. This demonstrates the importance of a third factor controlling the activity of the catalysts. The duration and temperature of the activation step depend on the ambient gas used. This activation step, during which a C-N-x-Fe complex is transformed into a catalytic site, is unapparent in the ""classical"" procedure. Both ""classical"" and step-by-step syntheses yield the same maximum catalytic activity when measured using. either the rotating disk electrode method or by fuel cell testing. The similarity in microporous specific area of catalysts made using theses two synthesis methods explains this finding.",,FE-BASED CATALYSTS; HEAT-TREATMENT AFFECT; OXYGEN-REDUCTION; CATHODE CATALYST; PLASMA TREATMENT; CARBON-BLACKS; NITROGEN; PYROLYSIS; ELECTROREDUCTION; STABILITY,FE-BASED CATALYSTS;HEAT-TREATMENT AFFECT;OXYGEN-REDUCTION;CATHODE CATALYST;PLASMA TREATMENT;CARBON-BLACKS;NITROGEN;PYROLYSIS;ELECTROREDUCTION;STABILITY,dodelet@emt.inrs.ca,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1932-7447,,,,English,J PHYS CHEM C,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science,WOS:000251830200034,,Canada,emt.inrs.ca,INRS Energie,"INRS Energie, Canada","Herranz, Juan; Lefevre, Michel; Larouche, Nicholas; Stansfield, Barry; Dodelet, Jean-Pol"
"Qu, X.M., Han, Y., Chen, Y.H., Lin, J.X., Li, G., Yang, J., Jiang, Y.X., Sun, S.G.",Stepwise pyrolysis treatment as an efficient strategy to enhance the stability performance of Fe-NX/C electrocatalyst towards oxygen reduction reaction and proton exchange membrane fuel cell,2021,APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY,295,,120311,,,11,112,10.1016/j.apcatb.2021.120311,,"[Qu, Ximing; Han, Yu; Chen, Youhu; Lin, Jinxia; Li, Guang; Yang, Jian; Jiang, Yanxia; Sun, Shigang] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China",,"Metal-nitrogen/carbon (M-NX/C) materials have been hailed as promising electrocatalysts toward oxygen reduction reaction (ORR). However, most reported promising Fe-N-X/C catalysts are prohibited by their low stability in acidic media. Here we report a rational stepwise pyrolysis strategy for stabilizing isolated Fe-N-X sites on highly graphitized N-doped carbon (NC) supports. The NC support derived from a harsh thermal treatment of 1100 degrees C can apparently enhance the graphitization degree of catalysts. The targeted catalyst, Fe-N-X/C-NC1100 achieved a half-wave potential (E-1/2) of 0.811 V and displayed superior stability in both ORR (only 25 mV loss of E-1/2 after 30000 cycles) and fuel cell (71 % current retention at a voltage of 0.5 V after 100 h) tests. High graphitization degree of carbon support was responsible for the enhancement of stability, which empowers strong antioxidant ability to Fe-NX/C catalyst.",Oxygen reduction reaction; Stability; Graphitization degree; Metal-nitrogen-carbon catalyst,N-C; CARBON; CATALYST,Oxygen reduction reaction;Stability;Graphitization degree;Metal-nitrogen-carbon catalyst;N-C;CARBON;CATALYST,yxjiang@xmu.edu.cn; wjianyang@xmu.edu.cn; sgsun@xum.edu.cn,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0926-3373,,,,English,APPL CATAL B-ENVIRON,Article,WoS,Chemistry; Engineering,WOS:000663321000005,2-s2.0-85105450620,China,xmu.edu.cn,Xiamen Univ,"Xiamen Univ, China","Qu, Ximing; Han, Yu; Chen, Youhu; Lin, Jinxia; Li, Guang; Yang, Jian; Jiang, Yanxia; Sun, Shigang"
"Yu, H.F., Li, C.C., Lei, Y.Y., Xiang, Z.H.",Strategic Secondary Coordination Implantation Towards Efficient and Stable Fe―N―C Electrocatalysts for the Oxygen Reduction Reaction in PEMFCs,2025,ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,64,33,,,,9,7,10.1002/anie.202508141,,"[Yu, Haifeng; Li, CongCong; Lei, Yiyang; Xiang, Zhonghua] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 10029, Peoples R China",,"While state-of-the-art Fe & horbar;N & horbar;C catalysts demonstrate platinum-comparable initial activity for the oxygen reduction reaction (ORR), their operational durability in proton exchange membrane fuel cells (PEMFCs) remains fundamentally limited by progressive destabilization of Fe & horbar;N bond under electrochemical cycling, resulting in irreversible metal leaching, catastrophic catalyst degradation and the so-called activity-stability trade-off. Herein, guided by first-principles screening, we demonstrate that the strategic implantation of transition metal ions with d-orbital characteristics analogous to the active site into the secondary coordination sphere, functioning as non-catalytic stabilizers, enables dynamic neutralization of reaction intermediates-induced electronic polarization, thereby achieving stabilization of metal & horbar;nitrogen bonds during the ORR cycle. As a proof-of-concept, the integration of isovalent Ru ions as electron-buffing site in the designed FeRu dual-atom catalyst not only achieves a high peak power density of 1.73 W cm-2 with a current density of 58 mA cm-2 at 0.9 V, but also exhibits exceptional durability, with a current decay rate of just 0.2 mA cm-2 h-1 and over 97% Fe retention after prolonged stability tests. This stands in stark contrast to Fe & horbar;N & horbar;C counterparts, which retain less than 11% of Fe sites under identical conditions.",Dual atom catalyst; Electron-buffing site; Oxygen reduction reaction; Proton exchange membrane fuel cells,HIGH-PERFORMANCE; CATALYSTS; SITES,Dual atom catalyst;Electron-buffing site;Oxygen reduction reaction;Proton exchange membrane fuel cells;HIGH-PERFORMANCE;CATALYSTS;SITES,xiangzh@mail.buct.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,,,,40525236,English,ANGEW CHEM INT EDIT,Article,WoS,Chemistry,WOS:001513679500001,,China,mail.buct.edu.cn,Beijing Univ Chem Technol,"Beijing Univ Chem Technol, China","Yu, Haifeng; Li, CongCong; Lei, Yiyang; Xiang, Zhonghua"
"Sa, Y.J., Woo, J., Joo, S.H.",Strategies for Enhancing the Electrocatalytic Activity of M-N/C Catalysts for the Oxygen Reduction Reaction,2018,TOPICS IN CATALYSIS,61,9-11,,1077,1100,24,29,10.1007/s11244-018-0935-0,,"[Sa, Young Jin; Woo, Jinwoo; Joo, Sang Hoon] UNIST, Sch Energy & Chem Engn, 50 UNIST Gil, Ulsan 44919, South Korea",,"The development of highly active and durable nonprecious metal catalysts that can replace expensive Pt-based catalysts for the oxygen reduction reaction (ORR) is of pivotal importance in polymer electrolyte membrane fuel cells. In this line of research, metal and nitrogen codoped carbon (M-N/C) catalysts have emerged as the most promising alternatives to Pt-based catalysts. This review provides an overview of recently developed synthetic strategies for the preparation of M-N/C catalysts to enhance the catalytic activity of the ORR. We present five major strategies, namely the use of metal-organic frameworks as hosts or precursors, the use of sacrificial templates, the addition of heteroelements, the preferential generation of active sites, and a biomimetic approach. For each strategy, the advantages capable of boosting catalytic activity in the ORR are summarized, and notable examples and their catalytic performances are presented. The ORR activities and measurement conditions of high-performing M-N/C catalysts are also tabulated. Finally, we summarize this review with some suggestions for future studies.",M-N/C; Electrocatalyst; Oxygen reduction reaction; Synthetic strategy,NITROGEN-DOPED CARBON; METAL-ORGANIC FRAMEWORK; HIGHLY EFFICIENT ELECTROCATALYSTS; HIGH-PERFORMANCE ELECTROCATALYSTS; FE-N-X; REDUCED GRAPHENE OXIDE; IRON-BASED CATALYSTS; HIGH-SURFACE-AREA; POROUS CARBON; GRAPHITIC LAYERS,M-N/C;Electrocatalyst;Oxygen reduction reaction;Synthetic strategy;NITROGEN-DOPED CARBON;METAL-ORGANIC FRAMEWORK;HIGHLY EFFICIENT ELECTROCATALYSTS;HIGH-PERFORMANCE ELECTROCATALYSTS;FE-N-X;REDUCED GRAPHENE OXIDE;IRON-BASED CATALYSTS;HIGH-SURFACE-AREA;POROUS CARBON;GRAPHITIC LAYERS,shjoo@unist.ac.kr,,"233 SPRING ST, NEW YORK, NY 10013 USA",,,,SPRINGER/PLENUM PUBLISHERS,1022-5528,,,,English,TOP CATAL,Article,WoS,Chemistry,WOS:000435827900031,2-s2.0-85046482114,South Korea,unist.ac.kr,UNIST,"UNIST, South Korea","Sa, Young Jin; Woo, Jinwoo; Joo, Sang Hoon"
"Niu, H., Liu, Q., Liu, H., Zhang, W., Xu, Q., Pasupathi, S., Su, H.",Strategies for mitigating phosphoric acid poisoning to enhance HT-PEMFC performance: Review and perspectives,2026,International Journal of Hydrogen Energy,197,,152693,,,,0,10.1016/j.ijhydene.2025.152693,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105022211083&doi=10.1016%2Fj.ijhydene.2025.152693&partnerID=40&md5=155af54eaf55817e87a914d9a363d7df,"Jiangsu University, Zhenjiang, Jiangsu, China; South African Institute for Advanced Materials Chemistry, University of the Western Cape, Bellville, Western Cape, South Africa","Niu, Han, Jiangsu University, Zhenjiang, Jiangsu, China; Liu, Qingqing, Jiangsu University, Zhenjiang, Jiangsu, China; Liu, Huiyuan, Jiangsu University, Zhenjiang, Jiangsu, China; Zhang, Weiqi, Jiangsu University, Zhenjiang, Jiangsu, China; Xu, Q., Jiangsu University, Zhenjiang, Jiangsu, China; Pasupathi, Sivakumar, South African Institute for Advanced Materials Chemistry, University of the Western Cape, Bellville, Western Cape, South Africa; Su, Huaneng, Jiangsu University, Zhenjiang, Jiangsu, China","High-temperature proton exchange membrane fuel cells (HT-PEMFCs) offer significant advantages for clean energy conversion. However, their performance is severely hindered by the dual role of phosphoric acid (PA), which serves as the proton conductor but also acts as a potent poison for platinum (Pt) catalysts, inhibiting the oxygen reduction reaction (ORR) and demanding high Pt loadings. This review provides a systematic analysis of the extensive efforts to mitigate PA poisoning. A diverse range of strategies is surveyed, including the development of poison-tolerant Pt-alloy catalysts (e.g., Pt–Ni, Pt–Co), the use of advanced carbon and metal oxide supports to leverage strong metal-support interactions, the design of protective surface modifications, the exploration of Pt-free catalysts like Fe–N–C, and the engineering of the catalyst layer with functional additives. Despite significant progress at the catalyst level, a critical performance gap persists between lab-scale tests and real-world membrane electrode assemblies (MEAs). This discrepancy arises because particle-centric approaches often neglect the severe mass transport limitations and low catalyst utilization within conventional, randomly structured electrodes flooded with viscous PA. To overcome these challenges, a paradigm shift is necessary. It is proposed that the future of HT-PEMFCs lies in a holistic approach that integrates advanced catalyst design with the fabrication of 3D ordered electrode architectures. These engineered structures create efficient transport pathways, maximize the functional triple-phase boundary, and can finally unlock the full potential of poison-tolerant catalysts, enabling high performance with drastically reduced Pt loadings. © 2025 Hydrogen Energy Publications LLC",Electrocatalyst; High-temperature proton exchange membrane fuel cell (HT-PEMFC); Ordered electrode architecture; Oxygen reduction reaction (ORR); Phosphoric acid poisoning,Additives; Binary alloys; Catalyst poisoning; Catalyst supports; Cobalt alloys; Electrodes; Electrolytic reduction; Oxygen; Oxygen reduction reaction; Phosphoric acid fuel cells (PAFC); Platinum alloys; Platinum metals; Electrode architecture; High temperature proton exchange membrane fuel cells; High-temperature proton exchange membrane fuel cell; Ordered electrode architecture; Performance; Phosphoric acid poisoning; Platinum loadings; ]+ catalyst; Phosphoric acid; Proton exchange membrane fuel cells (PEMFC),Electrocatalyst;High-temperature proton exchange membrane fuel cell (HT-PEMFC);Ordered electrode architecture;Oxygen reduction reaction (ORR);Phosphoric acid poisoning;Additives;Binary alloys;Catalyst poisoning;Catalyst supports;Cobalt alloys;Electrodes;Electrolytic reduction;Oxygen;Oxygen reduction reaction;Phosphoric acid fuel cells (PAFC);Platinum alloys;Platinum metals;Electrode architecture;High temperature proton exchange membrane fuel cells;High-temperature proton exchange membrane fuel cell;Performance;Platinum loadings;]+ catalyst;Phosphoric acid;Proton exchange membrane fuel cells (PEMFC),"H. Su; Institute for Energy Research, Jiangsu University, Zhenjiang, 301 Xuefu Road, 212013, China; email: suhuaneng@ujs.edu.cn",,,,,,Elsevier Ltd,03603199,0080311393,IJHED,,English,Int J Hydrogen Energy,Review,Scopus,,2-s2.0-105022211083,,China;South Africa,ujs.edu.cn,,,"Niu, H.; Liu, Q.; Liu, H.; Zhang, W.; Xu, Q.; Pasupathi, S.; Su, H."
"Xiang, Y., Si, J.",Strategies for reconciling tradeoff between conductivity and swelling in alkaline polymer electrolytes membrane,2015,Journal of Beijing University of Aeronautics and Astronautics,41,6,,961,968,,1,10.13700/j.bh.1001-5965.2015.0174,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84936942585&doi=10.13700%2Fj.bh.1001-5965.2015.0174&partnerID=40&md5=faa5b6749484ff58d777eaf6891b2422,"School of Chemistry and Environment, Beihang University, Beijing, China","Xiang, Yan, School of Chemistry and Environment, Beihang University, Beijing, China; Si, Jiangju, School of Chemistry and Environment, Beihang University, Beijing, China","Alkaline polymer electrolytes membrane fuel cells (APEMFC) have been investigated as an alternative to proton-exchange membrane fuel cells (PEMFC) because of their compatibility with nonprecious-metal catalyst, favorability toward fuel oxidation, together with the lower cost, where the charge carrier is OH- rather than H+. However, the performance of APEMFC, especially the conductivity, has thus far lagged that of PEMFC because of the intrinsic lower mobility of OH- than that of H+. The improvement of ion-exchange capacity (IEC) by increasing the grafting degree (GD) of cationic functional groups can, to some extent, solve this issue; however, a high IEC is always accompanied by excessive water uptake, swelling, and backbone degradation. Balancing the ionic conductivity and the dimensional stability in APEs has been a formidable scientific challenge. Here, we reviewed the research progress of the strategies for reconciling the tradeoff between conductivity and dimensional stability. These strategies include physical stratigies, such as blending and filling pores to restain the swelling, chemical cross-linking, enrichment of quaternary ammonium cation groups in the side chains and constructing efficient ionic channels by hydrophilic/hydrophobic phase segregation morphological structure like NafionⓇ membranes to enhance the mobility of OH-. The strategies mentioned above can all realize high ion conductivity and low water uptake and swelling at the same time to some extent. ©, 2015, Beijing University of Aeronautics and Astronautics (BUAA). All right reserved.",Alkaline polymer electrolytes (APE) membrane; Cross-link; Hydrophilic/hydrophobic phase segregation; Ion conductivity; Water uptake,Alkaline fuel cells; Alkalinity; Blending; Catalysts; Crosslinking; Hydrophilicity; Ion exchange; Ions; Membranes; Phase separation; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Hydrophilic/hydrophobic; Ion conductivities; Morphological structures; Non-precious metal catalysts; Phase segregations; Polymer electrolyte; Polymer electrolytes membrane fuel cells; Water uptake; Solid electrolytes,Alkaline polymer electrolytes (APE) membrane;Cross-link;Hydrophilic/hydrophobic phase segregation;Ion conductivity;Water uptake;Alkaline fuel cells;Alkalinity;Blending;Catalysts;Crosslinking;Hydrophilicity;Ion exchange;Ions;Membranes;Phase separation;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Hydrophilic/hydrophobic;Ion conductivities;Morphological structures;Non-precious metal catalysts;Phase segregations;Polymer electrolyte;Polymer electrolytes membrane fuel cells;Solid electrolytes,"Y. Xiang; School of Chemistry and Environment, Beijing University of Aeronautics and Astronautics, Beijing, 100191, China; email: xiangy@buaa.edu.cn",,,,,,Beijing University of Aeronautics and Astronautics (BUAA),10015965,,BHHDE,,Chinese,Beijing Hangkong Hangtian Daxue Xuebao,Article,Scopus,,2-s2.0-84936942585,,China,buaa.edu.cn,,,"Xiang, Y.; Si, J."
"Liao, W., Zhou, S., Wang, Z., Long, J., Chen, M., Zhou, Q., Wang, Q.",Stress induced to shrink ZIF-8 derived hollow Fe-NC supports synergizes with Pt nanoparticles to promote oxygen reduction electrocatalysis,2022,Journal of Materials Chemistry A,,,,,,,20,10.1039/d2ta05643g,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85140312176&doi=10.1039%2Fd2ta05643g&partnerID=40&md5=26abfcf0184b7a376ea8fc2ea4d57aed,"School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou, China","Liao, Wei, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou, China; Zhou, Shangyan, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou, China; Wang, Zhengcheng, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou, China; Long, Jin, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou, China; Chen, Meida, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou, China; Zhou, Qian, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou, China; Wang, Qingmei, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou, China","The high cost and insufficient performance of Pt catalysts for the oxygen reduction reaction (ORR) are considered obstacles to the realization of the widespread application of proton exchange membrane fuel cell technology. Here, we report a strategy of integrating a stress-induced shrinkage mechanism and an impregnation reduction method to disperse Pt nanoparticles (NPs) onto stress-induced to shrink ZIF-8 derived hollow N-coordinated Fe atom embedded in carbon (Fe-NC) dodecahedron nanomaterials to obtain a fantastic-performance Pt@Fe-NC electrocatalyst for the oxygen reduction reaction (ORR). The prepared Pt@Fe-NC shows high ORR activity due to its multiple active centers and hollow porous structure conducive to mass transfer. The half-wave potential for Pt@Fe-NC is 0.936 V, and the mass activity of 1.34 A mg<inf>pt</inf>−1 is 6.77 times that of commercial Pt/C (0.198 A mg<inf>pt</inf>−1). Stability examinations demonstrate that Pt@Fe-NC shows higher catalytic durability than Pt/C catalysts. DFT calculations revealed that the interaction between Pt NPs and Fe-NC supports would enhance the anchoring of Pt and would weaken the adsorption of *OH intermediates on Pt and Fe sites, enhancing ORR intrinsic activity. Our work provides a new direction for exploring noble metal Pt and metal-nitrogen-carbon synergy to realize electrocatalysts designed for a highly active ORR. © 2022 The Royal Society of Chemistry.",,Carbon; Coordination reactions; Electrocatalysis; Electrolytic reduction; Iron; Mass transfer; Metal nanoparticles; Oxygen; Platinum; Fuel cell technologies; High costs; Oxygen Reduction; Oxygen reduction reaction; Performance; Proton-exchange membranes fuel cells; Pt catalysts; Pt nanoparticles; Shrinkage mechanisms; Stress-induced; Electrocatalysts,Carbon;Coordination reactions;Electrocatalysis;Electrolytic reduction;Iron;Mass transfer;Metal nanoparticles;Oxygen;Platinum;Fuel cell technologies;High costs;Oxygen Reduction;Oxygen reduction reaction;Performance;Proton-exchange membranes fuel cells;Pt catalysts;Pt nanoparticles;Shrinkage mechanisms;Stress-induced;Electrocatalysts,"Q. Wang; Guizhou University Key Laboratory of Green Chemical and Clean Energy Technology, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou, 550025, China; email: wqm0702@outlook.com",,,,,,Royal Society of Chemistry,20507488,,JMCAE,,English,J. Mater. Chem. A,Article,Scopus,,2-s2.0-85140312176,,China,outlook.com,,,"Liao, W.; Zhou, S.; Wang, Z.; Long, J.; Chen, M.; Zhou, Q.; Wang, Q."
"Liu, Y., Jang, H., Xi, X., Zhong, Y., Cao, R., Jiao, S., Li, X., Lei, Z., Luo, J.L.",Strong Catalyst-Support Interaction Stabilizes IrOx Nanoclusters for Efficient Acidic Oxygen Evolution,2025,Advanced Functional Materials,,,,,,,1,10.1002/adfm.202515920,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105014595979&doi=10.1002%2Fadfm.202515920&partnerID=40&md5=a41dd47904c391b155c3956118642b02,"College of Materials Science and Engineering, Shenzhen University, Shenzhen, Guangdong, China; Department of Materials Science and Engineering, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Department of Advanced Materials Engineering, Chung-Ang University, Seoul, South Korea; School of Physical Sciences, Great Bay University, Dongguan, Guangdong, China","Liu, Yang, College of Materials Science and Engineering, Shenzhen University, Shenzhen, Guangdong, China, Department of Materials Science and Engineering, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Jang, Haeseong, Department of Advanced Materials Engineering, Chung-Ang University, Seoul, South Korea; Xi, Xiaoke, Department of Materials Science and Engineering, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Zhong, Ying, Department of Materials Science and Engineering, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Cao, Ruiguo, Department of Materials Science and Engineering, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Jiao, Shuhong, Department of Materials Science and Engineering, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Li, Xiyu, School of Physical Sciences, Great Bay University, Dongguan, Guangdong, China; Lei, Zhanwu, Department of Materials Science and Engineering, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Luo, Jingli, College of Materials Science and Engineering, Shenzhen University, Shenzhen, Guangdong, China","Low-loading iridium (Ir) catalysts hold great promise for the acidic oxygen evolution reaction (OER) due to their typically high Ir utilization and reduced cost. However, their practical application is limited by poor stability under the harsh acidic oxidative conditions of proton exchange membrane (PEM) water electrolysis. Here, a controlled structural transformation strategy is presented that converts an unstable LiCoO<inf>2</inf>-supported Ir single-atom catalyst (Ir-LiCoO<inf>2</inf>) into a corrosion-resistant Co<inf>3</inf>O<inf>4</inf>-supported IrO<inf>x</inf> nanocluster catalyst (IrO<inf>x</inf>/Co<inf>3</inf>O<inf>4</inf>), significantly enhancing catalyst durability. Strong catalyst-support interactions between IrO<inf>x</inf> and Co<inf>3</inf>O<inf>4</inf> facilitate charge transfer, thereby stabilizing the IrO<inf>x</inf> nanoclusters against leaching and optimizing the electronic structure of the Ir active sites. As a result, IrO<inf>x</inf>/Co<inf>3</inf>O<inf>4</inf> exhibits substantially enhanced OER performance compared to Ir-LiCoO<inf>2</inf>, achieving excellent operational stability over 1200 h and a low overpotential of ≈233 mV at 10 mA cm−2 in 0.5 m H<inf>2</inf>SO<inf>4</inf>. This superior performance is further validated in PEM electrolyzers, confirming its practical applicability. Furthermore, theoretical calculations reveal that Ir sites in IrO<inf>x</inf>/Co<inf>3</inf>O<inf>4</inf> exhibit higher dissolution potentials and improve charge transfer capabilities with OER intermediates compare to those in Ir-LiCoO<inf>2</inf> and IrO<inf>2</inf>, which effectively suppresses Ir leaching and lowers the energy barrier of the potential-determining step. © 2025 Wiley-VCH GmbH.",catalyst-support interaction; nanocluster; oxygen evolution reaction; PEM water electrolysis; single-atom catalysts; structural transformation,Catalyst activity; Catalyst supports; Charge transfer; Cobalt compounds; Electrolysis; Electronic structure; Iridium compounds; Oxygen; Proton exchange membrane fuel cells (PEMFC); Catalyst-support interaction; Catalysts support; Evolution reactions; Oxygen evolution; Proton exchange membrane water electrolyse; Proton exchange membranes; Single-atom catalyst; Single-atoms; Structural transformation; Support interaction; Water electrolysis; ]+ catalyst; Nanoclusters,catalyst-support interaction;nanocluster;oxygen evolution reaction;PEM water electrolysis;single-atom catalysts;structural transformation;Catalyst activity;Catalyst supports;Charge transfer;Cobalt compounds;Electrolysis;Electronic structure;Iridium compounds;Oxygen;Proton exchange membrane fuel cells (PEMFC);Catalysts support;Evolution reactions;Oxygen evolution;Proton exchange membrane water electrolyse;Proton exchange membranes;Single-atom catalyst;Single-atoms;Support interaction;Water electrolysis;]+ catalyst;Nanoclusters,"J.-L. Luo; Shenzhen Key Laboratory of Energy Electrocatalytic Materials, Guangdong Provincial Key Laboratory of New Energy Materials Service Safety, College of Materials Science and Engineering, Shenzhen University, Shenzhen, Guangdong, 518055, China; email: jingli.luo@ualberta.ca; Z. Lei; Hefei National Laboratory for Physical Science at the Microscale, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China; email: zwlei@mail.ustc.edu.cn; X. Li; School of Physical Sciences, Great Bay University, Dongguan, 523000, China; email: lixiyu@gbu.edu.cn",,,,,,John Wiley and Sons Inc,1616301X,,AFMDC,,English,Adv. Funct. Mater.,Article,Scopus,,2-s2.0-105014595979,,China;South Korea,ualberta.ca,,,"Liu, Y.; Jang, H.; Xi, X.; Zhong, Y.; Cao, R.; Jiao, S.; Li, X.; Lei, Z.; Luo, J.-L."
"Armel, V., Hindocha, S., Salles, F., Bennett, S., Jones, D., Jaouen, F.",Structural descriptors of zeolitic-lmidazolate frameworks are keys to the activity of Fe-N-C catalysts,2017,Journal of the American Chemical Society,139,1,,453,464,,178,10.1021/jacs.6b11248,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85016080906&doi=10.1021%2Fjacs.6b11248&partnerID=40&md5=12144be2056c5075426fa9376350d5a7,"Interfaces and Materials for Energy, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Johnson Matthey Plc, London, United Kingdom; MINATEC, Grenoble, France","Armel, Vanessa, Interfaces and Materials for Energy, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France, MINATEC, Grenoble, France; Hindocha, Sheena, Johnson Matthey Plc, London, United Kingdom; Salles, Fabrice, Interfaces and Materials for Energy, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Bennett, Stephen C., Johnson Matthey Plc, London, United Kingdom; Jones, Deborah Jacqueline, Interfaces and Materials for Energy, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Jaouen, Frédéric, Interfaces and Materials for Energy, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France","Active and inexpensive catalysts for oxygen reduction are crucially needed for the widespread development of polymer electrolyte fuel cells and metal-air batteries. While iron-nitrogen-carbon materials pyrolytically prepared from ZIF-8, a specific zeolitic imidazolate framework (ZIF) with sodalite topology, have shown enhanced activities toward oxygen reduction in acidic electrolyte, the rational design of sacrificial metal-organic frameworks toward this application has hitherto remained elusive. Here, we report for the first time that the oxygen reduction activity of Fe-N-C catalysts positively correlates with the cavity size and massspecific pore volume in pristine ZIFs. The high activity of Fe-N-C materials prepared from ZIF-8 could be rationalized, and another ZIF structure leading to even higher activity was identified. In contrast, the ORR activity is mostly unaffected by the ligand chemistry in pristine ZIFs. These structure-property relationships will help identifying novel sacrificial ZIF or porous metal-organic frameworks leading to even more active Fe-N-C catalysts. The findings are of great interest for a broader application of the class of inexpensive metalnitrogen-carbon catalysts that have shown promising activity also for the hydrogen evolution (Co-N-C) and carbon dioxide reduction (Fe-N-C and Mn-N-C). © 2016 American Chemical Society.",,Carbon dioxide; Catalysts; Crystalline materials; Electrolytic reduction; Iron compounds; Manganese compounds; Metals; Organometallics; Oxygen; Pollution control; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Secondary batteries; Solid electrolytes; Acidic electrolytes; Carbon dioxide reduction; Hydrogen evolution; Metal organic framework; Polymer electrolyte fuel cells; Structural descriptors; Structure property relationships; Zeolitic imidazolate frameworks; C (programming language); carbon; iron; metal organic framework; nitrogen; unclassified drug; zeolitic imidazolate framework; Article; catalyst; chemical composition; chemical structure; controlled study; hydrogen evolution; molecular probe; quantitative structure property relation; stoichiometry; structure activity relation; surface property; synthesis,Carbon dioxide;Catalysts;Crystalline materials;Electrolytic reduction;Iron compounds;Manganese compounds;Metals;Organometallics;Oxygen;Pollution control;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Secondary batteries;Solid electrolytes;Acidic electrolytes;Carbon dioxide reduction;Hydrogen evolution;Metal organic framework;Polymer electrolyte fuel cells;Structural descriptors;Structure property relationships;Zeolitic imidazolate frameworks;C (programming language);carbon;iron;nitrogen;unclassified drug;zeolitic imidazolate framework;Article;catalyst;chemical composition;chemical structure;controlled study;molecular probe;quantitative structure property relation;stoichiometry;structure activity relation;surface property;synthesis,"F. Jaouen; Institut Charles Gerhardt Montpellier, Laboratory for Aggregates, Interfaces and Materials for Energy, UMR 5253, CNRS, Université de Montpellier, Montpellier, 34095, France; email: frederic.jaouen@umontpellier.fr",,,,,,American Chemical Society service@acs.org,00027863,,JACSA,27936673,English,J. Am. Chem. Soc.,Article,Scopus,,2-s2.0-85016080906,,France;United Kingdom,umontpellier.fr,,,"Armel, V.; Hindocha, S.; Salles, F.; Bennett, S.; Jones, D.; Jaouen, F."
"Li, J.K., Jaouen, F.",Structure and activity of metal-centered coordination sites in pyrolyzed metal-nitrogen-carbon catalysts for the electrochemical reduction of O2,2018,CURRENT OPINION IN ELECTROCHEMISTRY,9,,,198,206,9,57,10.1016/j.coelec.2018.03.039,,"[Li, Jingkun; Jaouen, Frederic] Univ Montpellier, Inst Charles Gerhardt Montpellier, CNRS, UMR 5253,ENSCM, Pl Eugene Bataillon, F-34095 Montpellier 5, France",,"Pyrolyzed metal-nitrogen-carbon (M-N-C) materials have become a mainstream research as inexpensive and sustainable catalysts for the oxygen reduction reaction (ORR) in both acid and alkaline media for low and intermediate temperature fuel cells. Tremendous advancements in the initial activity and power performance of M-N-C catalysts and cathodes have been achieved, as driven by their possible application in e.g. automotive fuel cell stacks. Based on a selected number of recent studies, this review critically discusses the advancements, but also highlights the remaining scientific questions and technical issues important in this field. The nature of the active site(s) as well as their intrinsic activity toward ORR have been clarified in particular through the preparation of model catalysts comprising only MNxCy moieties. Recently developed methods hold promise to reliably enumerate the number of electrochemically accessible active sites in such materials, which would allow deconvoluting the activity into site density and turnover frequency.",,DENSITY-FUNCTIONAL THEORY; PEM FUEL-CELLS; FE-BASED CATALYSTS; OXYGEN-REDUCTION; FE/N/C-CATALYSTS; DOPED CARBON; ELECTROCATALYSTS; IRON; IDENTIFICATION; ORR,DENSITY-FUNCTIONAL THEORY;PEM FUEL-CELLS;FE-BASED CATALYSTS;OXYGEN-REDUCTION;FE/N/C-CATALYSTS;DOPED CARBON;ELECTROCATALYSTS;IRON;IDENTIFICATION;ORR,frederic.jaouen@umontpellier.fr,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2451-9103,,,,English,CURR OPIN ELECTROCHE,Review,WoS,Chemistry; Electrochemistry; Materials Science,WOS:000442798800028,,France,umontpellier.fr,Univ Montpellier,"Univ Montpellier, France","Li, Jingkun; Jaouen, Frederic"
"Kramm, U.I., Herranz, J., Larouche, N., Arruda, T.M., Lefevre, M., Jaouen, F., Bogdanoff, P., Fiechter, S., Abs-Wurmbach, I., Mukerjee, S., Dodelet, J.P.",Structure of the catalytic sites in Fe/N/C-catalysts for O 2-reduction in PEM fuel cells,2012,Physical Chemistry Chemical Physics,14,33,,11673,11688,,665,10.1039/c2cp41957b,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84864705143&doi=10.1039%2Fc2cp41957b&partnerID=40&md5=731b8691ddcb888834d8fab82b4ef334,"Institut National de la Recherche Scientifique, Quebec, QC, Canada; Helmholtz-Zentrum Berlin für Materialien und Energie (HZB), Berlin, Germany; Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA, United States; Faculty VI, Technische Universität Berlin, Berlin, Germany","Kramm, Ulrike Ingrid, Institut National de la Recherche Scientifique, Quebec, QC, Canada, Helmholtz-Zentrum Berlin für Materialien und Energie (HZB), Berlin, Germany; Herranz, Juan, Institut National de la Recherche Scientifique, Quebec, QC, Canada; Larouche, Nicholas, Institut National de la Recherche Scientifique, Quebec, QC, Canada; Arruda, Thomas M., Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA, United States; Lefèvre, Michel, Institut National de la Recherche Scientifique, Quebec, QC, Canada; Jaouen, Frédéric, Institut National de la Recherche Scientifique, Quebec, QC, Canada; Bogdanoff, Peter, Helmholtz-Zentrum Berlin für Materialien und Energie (HZB), Berlin, Germany; Fiechter, Sebastian, Helmholtz-Zentrum Berlin für Materialien und Energie (HZB), Berlin, Germany; Abs-Wurmbach, Irmgard, Faculty VI, Technische Universität Berlin, Berlin, Germany; Mukerjee, Sanjeev, Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA, United States; Dodelet, Jean Pol, Institut National de la Recherche Scientifique, Quebec, QC, Canada","Fe-based catalytic sites for the reduction of oxygen in acidic medium have been identified by 57Fe Mössbauer spectroscopy of Fe/N/C catalysts containing 0.03 to 1.55 wt% Fe, which were prepared by impregnation of iron acetate on carbon black followed by heat-treatment in NH<inf>3</inf> at 950°C. Four different Fe-species were detected at all iron concentrations: three doublets assigned to molecular FeN<inf>4</inf>-like sites with their ferrous ions in a low (D1), intermediate (D2) or high (D3) spin state, and two other doublets assigned to a single Fe-species (D4 and D5) consisting of surface oxidized nitride nanoparticles (Fe<inf>x</inf>N, with x ≤ 2.1). A fifth Fe-species appears only in those catalysts with Fe-contents ≥0.27 wt%. It is characterized by a very broad singlet, which has been assigned to incomplete FeN<inf>4</inf>-like sites that quickly dissolve in contact with an acid. Among the five Fe-species identified in these catalysts, only D1 and D3 display catalytic activity for the oxygen reduction reaction (ORR) in the acid medium, with D3 featuring a composite structure with a protonated neighbour basic nitrogen and being by far the most active species, with an estimated turn over frequency for the ORR of 11.4 e- per site per s at 0.8 V vs. RHE. Moreover, all D1 sites and between 1/2 and 2/3 of the D3 sites are acid-resistant. A scheme for the mechanism of site formation upon heat-treatment is also proposed. This identification of the ORR-active sites in these catalysts is of crucial importance to design strategies to improve the catalytic activity and stability of these materials. © 2012 the Owner Societies.",,ammonia; carbon; electrolyte; iron; nitrogen; oxygen; article; catalysis; chemistry; electrode; oxidation reduction reaction; Ammonia; Carbon; Catalysis; Electrodes; Electrolytes; Iron; Nitrogen; Oxidation-Reduction; Oxygen,ammonia;carbon;electrolyte;iron;nitrogen;oxygen;article;catalysis;chemistry;electrode;oxidation reduction reaction;Electrodes;Electrolytes;Oxidation-Reduction,"U.I. Kramm; Institut National de la Recherche Scientifique, Énergie, Matériaux et Télécommunications Varennes, QC J3X 1S2, Canada; email: kramm@tu-cottbus.de",,,,,,,14639076,,PPCPF,22824866,English,Phys. Chem. Chem. Phys.,Article,Scopus,,2-s2.0-84864705143,,Canada;Germany;United States,tu-cottbus.de,,,"Kramm, U.I.; Herranz, J.; Larouche, N.; Arruda, T.M.; Lefevre, M.; Jaouen, F.; Bogdanoff, P.; Fiechter, S.; Abs-Wurmbach, I.; Mukerjee, S.; Dodelet, J.-P."
"Roiron, C., Celle, C., Jacques, P.A., Heitzmann, M., Simonato, J.P.",Structure-Property Relationship of Cryogel-Based Fe-N-C Catalysts for the Oxygen Reduction Reaction,2021,ENERGY & FUELS,35,20,,16814,16821,8,9,10.1021/acs.energyfuels.1c02580,,"[Roiron, Camille; Celle, Caroline; Jacques, Pierre-Andre; Heitzmann, Marie; Simonato, Jean-Pierre] Univ Grenoble Alpes, DEHT, CEA LITEN, F-38054 Grenoble, France",,"As part of the cost reduction of proton exchange membrane fuel cells, the substitution of the standard platinum catalyst by iron active sites for the oxygen reduction reaction (ORR) appears as a promising route. Herein, we report Pt-free catalysts prepared through an Fe-N-doped carbon cryogel synthesis process. By tuning selected parameters such as the initial pH and precursor molar ratios, various new structures with different chemical compositions and catalytic activities were synthesized and characterized. Carbon cryogels are porous materials, and the achieved hierarchical structures proved favorable for the accessibility of the active sites for O-2 and H+. The value of the pH medium was identified as a key parameter to control the structure of N-rich carbon cryogels, leading to a specific pH range to diphasic hydrogels. These materials are described and characterized for the first time, and they show promising catalytic activity for the ORR.",,CARBON AEROGELS; PERFORMANCE; XEROGELS; ELECTROCATALYSTS; RESORCINOL; IRON; PH; VALIDATION; POROSITY,CARBON AEROGELS;PERFORMANCE;XEROGELS;ELECTROCATALYSTS;RESORCINOL;IRON;PH;VALIDATION;POROSITY,jean-pierre.simonato@cea.fr,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,0887-0624,,,,English,ENERG FUEL,Article,WoS,Energy & Fuels; Engineering,WOS:000711024500040,2-s2.0-85117481205,France,cea.fr,Univ Grenoble Alpes,"Univ Grenoble Alpes, France","Roiron, Camille; Celle, Caroline; Jacques, Pierre-Andre; Heitzmann, Marie; Simonato, Jean-Pierre"
"Subramanian, N.P., Kumaraguru, S.P., Colon-Mercado, H., Kim, H., Popov, B.N., Black, T., Chen, D.A.",Studies on Co-based catalysts supported on modified carbon substrates for PEMFC cathodes,2006,JOURNAL OF POWER SOURCES,157,1,,56,63,8,174,10.1016/j.jpowsour.2005.07.031,,"Univ S Carolina, Dept Chem Engn, Columbia, SC 29208 USA; Univ S Carolina, Dept Chem & Biochem, Columbia, SC 29208 USA; Yonsei Univ, Dept Chem Engn, Seoul, South Korea",,"Cobalt based non-precious metal catalysts were prepared by supporting cobalt-ethylene diamine complex on carbon followed by a heat treatment at elevated temperatures (800 degrees C). Surface oxygen groups on carbon were introduced with HNO3 oxidation. Co catalysts supported on oxidized carbon showed improved activity and selectivity towards four-electron reduction of molecular oxygen. Quinone groups introduced by nitric acid treatment, in addition to increasing the dispersion of the chelate complexes, play a role in forming the active site for oxygen reduction. (c) 2005 Elsevier B.V All rights reserved.",PEM fuel cells; oxygen reduction; non-noble metal catalyst; electrocatalysis; carbon activation,OXYGEN REDUCTION CATALYSTS; ELECTROLYTE FUEL-CELLS; FE-BASED CATALYSTS; PYROLYSIS; ELECTROREDUCTION; SULFONATION; BLACK; PT/C,PEM fuel cells;oxygen reduction;non-noble metal catalyst;electrocatalysis;carbon activation;OXYGEN REDUCTION CATALYSTS;ELECTROLYTE FUEL-CELLS;FE-BASED CATALYSTS;PYROLYSIS;ELECTROREDUCTION;SULFONATION;BLACK;PT/C,popov@engr.sc.edu,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:000238587900007,2-s2.0-33646878978,United States;South Korea,engr.sc.edu,Dept Chem Engn;Dept Chem & Biochem,"Dept Chem Engn, United States;Dept Chem & Biochem, United States;Dept Chem Engn, South Korea","Subramanian, Nalini P.; Kumaraguru, Swaminatha P.; Colon-Mercado, Hector; Kim, Hansung; Popov, Branko N.; Black, Timothy; Chen, Donna A."
"Peng, Y., Wang, Y., Wei, X., Zhou, J., Peng, H., Xiao, L., Lu, J., Zhuang, L.",Sulfonated Nanobamboo Fiber-Reinforced Quaternary Ammonia Poly(ether ether ketone) Membranes for Alkaline Polymer Electrolyte Fuel Cells,2018,ACS Applied Materials and Interfaces,10,39,,33581,33588,,28,10.1021/acsami.8b12637,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85053904235&doi=10.1021%2Facsami.8b12637&partnerID=40&md5=724ceb8b2160ff8780db90f83841133a,"Wuhan University, Wuhan, Hubei, China; Institute for Advanced Studies, Wuhan University, Wuhan, Hubei, China","Peng, Yanqiu, Wuhan University, Wuhan, Hubei, China; Wang, Ying, Institute for Advanced Studies, Wuhan University, Wuhan, Hubei, China; Wei, Xing, Wuhan University, Wuhan, Hubei, China; Zhou, Jinping, Wuhan University, Wuhan, Hubei, China; Peng, Hanqing, Wuhan University, Wuhan, Hubei, China; Xiao, Li, Wuhan University, Wuhan, Hubei, China; Lu, Juntao, Wuhan University, Wuhan, Hubei, China; Zhuang, Lin, Wuhan University, Wuhan, Hubei, China, Institute for Advanced Studies, Wuhan University, Wuhan, Hubei, China","Alkaline polymer electrolyte fuel cells (APEFCs) are a new class of electrochemical devices that intrinsically enable the use of nonprecious metal catalysts. As an important component of APEFCs, alkaline polymer electrolytes (APEs) have been a research focus in recent decades. To minimize the ohmic loss and to facilitate the water transport, the APE membrane should be as thin as possible, which generally requires a trade-off between the ionic conductivity and the mechanical robustness/dimensional stability of the membrane. Here, we report a new reinforced APE membrane that can effectively disentangle such a trade-off. The quaternary ammonia poly(ether ether ketone) (QAPEEK) membrane is highly conductive but suffers from the overuptake of water, which leads to significant membrane swelling and weak mechanical strength. Upon reinforcing with sulfonated nanobamboo fiber (s-NBF), the swelling degree decreases from 27.5 to 7.5% in 80 °C water. The thickness of such an s-NBF/QAPEEK membrane can then be reduced to 15 μm, which diminishes the electrical resistance, very suitable for APEFC applications. © Copyright 2018 American Chemical Society.",alkaline polymer electrolytes; fuel cells; poly(ether ether ketone); sulfonated nanobamboo fiber; ultrathin membrane,Alkaline fuel cells; Ammonia; Catalysts; Economic and social effects; Ethers; Fuel cells; Gas fuel purification; Ketones; Membranes; Proton exchange membrane fuel cells (PEMFC); Reinforcement; Solid electrolytes; Alkaline polymer electrolyte fuel cells; Electrical resistances; Electrochemical devices; Mechanical robustness; Membrane swelling; Non-precious metal catalysts; Polymer electrolyte; Ultra-thin membranes; Polyelectrolytes,alkaline polymer electrolytes;fuel cells;poly(ether ether ketone);sulfonated nanobamboo fiber;ultrathin membrane;Alkaline fuel cells;Ammonia;Catalysts;Economic and social effects;Ethers;Gas fuel purification;Ketones;Membranes;Proton exchange membrane fuel cells (PEMFC);Reinforcement;Solid electrolytes;Alkaline polymer electrolyte fuel cells;Electrical resistances;Electrochemical devices;Mechanical robustness;Membrane swelling;Non-precious metal catalysts;Polymer electrolyte;Ultra-thin membranes;Polyelectrolytes,"L. Xiao; College of Chemistry and Molecular Sciences, Hubei Key Laboratory of Electrochemical Power Sources, Wuhan, 430072, China; email: chem.lily@whu.edu.cn",,,,,,American Chemical Society service@acs.org,19448244,,,30198705,English,ACS Appl. Mater. Interfaces,Article,Scopus,,2-s2.0-85053904235,,China,whu.edu.cn,,,"Peng, Y.; Wang, Y.; Wei, X.; Zhou, J.; Peng, H.; Xiao, L.; Lu, J.; Zhuang, L."
"Liu, B., Li, J., Yan, B., Wei, Q., Wen, X., Xie, H., He, H., Shen, P.K., Tian, Z.Q.",Sulfur doped iron-nitrogen-hard carbon nanosheets as efficient and robust noble metal-free catalysts for oxygen reduction reaction in PEMFC,2024,Journal of Energy Chemistry,89,,,422,433,,15,10.1016/j.jechem.2023.10.046,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85178368038&doi=10.1016%2Fj.jechem.2023.10.046&partnerID=40&md5=808dd3293fa1756835903f6f6b64c638,"State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China","Liu, Bin, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Li, Jiawang, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Yan, Bowen, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Wei, Qi, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Wen, Xingyu, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Xie, Huarui, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; He, Huan, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Shen, Peikang, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China; Tian, Zhiqun, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, Guangxi, China","Transition metal-nitrogen-carbon (M-N-C) as a promising substitute for the conventional noble metal-based catalyst still suffers from low activity and durability for oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). To tackle the issue, herein, a new type of sulfur-doped iron-nitrogen-hard carbon (S-Fe-N-HC) nanosheets with high activity and durability in acid media were developed by using a newly synthesized precursor of amide-based polymer with Fe ions based on copolymerizing two monomers of 2, 5-thiophene dicarboxylic acid (TDA) as S source and 1, 8-diaminonaphthalene (DAN) as N source via an amination reaction. The as-synthesized S-Fe-N-HC features highly dispersed atomic FeN<inf>x</inf> moieties embedded into rich thiophene-S doped hard carbon nanosheets filled with highly twisted graphite-like microcrystals, which is distinguished from the majority of M-N-C with soft or graphitic carbon structures. These unique characteristics endow S-Fe-N-HC with high ORR activity and outstanding durability in 0.5 M H<inf>2</inf>SO<inf>4</inf>. Its initial half-wave potential is 0.80 V and the corresponding loss is only 21 mV after 30,000 cycles. Meanwhile, its practical PEMFC performance is a maximum power output of 628.0 mW cm−2 and a slight power density loss is 83.0 mW cm−2 after 200-cycle practical operation. Additionally, theoretical calculation shows that the activity of FeN<inf>x</inf> moieties on ORR can be further enhanced by sulfur doping at meta-site near FeN<inf>4</inf>C. These results evidently demonstrate that the dual effect of hard carbon substrate and S doping derived from the precursor platform of amid-polymers can effectively enhance the activity and durability of Fe-N-C catalysts, providing a new guidance for developing advanced M-N-C catalysts for ORR. © 2023 Science Press",Amide based polymer reaction; Hard carbon; Oxygen reduction reaction; Proton exchange membrane cells; Transition metal-nitrogen-carbon,Amines; Durability; Electrocatalysts; Electrolytic reduction; Iron; Iron compounds; Nanosheets; Nitrogen; Oxygen; Precious metals; Proton exchange membrane fuel cells (PEMFC); Sulfur; Amide based polymer reaction; Carbon nanosheets; Hard carbon; Iron nitrogen; Nitrogen-carbon; Oxygen reduction reaction; Polymer Reaction; Proton exchange membrane cells; Proton-exchange membranes fuel cells; Transition metal-nitrogen-carbon; Amides,Amide based polymer reaction;Hard carbon;Oxygen reduction reaction;Proton exchange membrane cells;Transition metal-nitrogen-carbon;Amines;Durability;Electrocatalysts;Electrolytic reduction;Iron;Iron compounds;Nanosheets;Nitrogen;Oxygen;Precious metals;Proton exchange membrane fuel cells (PEMFC);Sulfur;Carbon nanosheets;Iron nitrogen;Nitrogen-carbon;Polymer Reaction;Proton-exchange membranes fuel cells;Amides,"H. He; Collaborative Innovation Center of Sustainable Energy Materials, School of Physical Science and Technology, Guangxi University, Guangxi Key Laboratory of Electrochemical Energy Materials, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning, Guangxi, 530004, China; email: noblehe@gxu.edu.cn",,,,,,Elsevier B.V.,20954956,,,,English,J. Energy Chem.,Article,Scopus,,2-s2.0-85178368038,,China,gxu.edu.cn,,,"Liu, B.; Li, J.; Yan, B.; Wei, Q.; Wen, X.; Xie, H.; He, H.; Shen, P.K.; Tian, Z.Q."
"Zhang, C., An, B., Yang, L., Wu, B.B., Shi, W., Wang, Y.C., Long, L.S., Wang, C., Lin, W.B.",Sulfur-doping achieves efficient oxygen reduction in pyrolyzed zeolitic imidazolate frameworks,2016,JOURNAL OF MATERIALS CHEMISTRY A,4,12,,4457,4463,7,70,10.1039/c6ta00768f,,"[Zhang, Chao; An, Bing; Yang, Ling; Wu, Binbin; Shi, Wei; Wang, Yu-Cheng; Long, La-Sheng; Wang, Cheng; Lin, Wenbin] Xiamen Univ, Coll Chem & Chem Engn, Collaborat Innovat Ctr Chem Energy Mat, State Key Lab Phys Chem Solid Surfaces,Dept Chem, Xiamen 361005, Peoples R China; [Lin, Wenbin] Univ Chicago, Dept Chem, 929 E 57th St, Chicago, IL 60637 USA",,"We report the first synthesis of sulfurated porous carbon materials with well-defined morphologies and uniform N/S distributions via pyrolysis of zeolitic imidazolate frameworks loaded with sulfur-containing molecules. The optimized sulfurated catalyst demonstrates excellent electrocatalytic activity for the oxygen reduction reaction (ORR) in both acid and alkaline media. The sulfurization process under optimized conditions can lower the ORR over-potential by ca. 170 mV at 3 mA cm(-2), giving a non-precious metal catalyst with an onset ORR potential of 0.90 V (vs. RHE, similarly hereinafter)/half-wave potential of 0.78 V in 0.1 M HClO4 and an onset ORR potential of 0.98 V/half-wave potential of 0.88 V in 0.1 M KOH. Furthermore, the S-doped porous carbon materials perform better in the long-term durability test than the non-S-doped samples and standard commercially available Pt/C. We also discuss different sulfuration methods for the ZIF system, morphologies of pyrolyzed samples, and catalytically active sites.",,METAL-ORGANIC FRAMEWORK; NITROGEN-DOPED CARBON; ORDERED MESOPOROUS CARBON; ANION-EXCHANGE MEMBRANES; HIGH-SURFACE-AREA; PEM FUEL-CELLS; HIGH-PERFORMANCE; FREE ELECTROCATALYST; EVOLUTION REACTIONS; GRAPHENE,METAL-ORGANIC FRAMEWORK;NITROGEN-DOPED CARBON;ORDERED MESOPOROUS CARBON;ANION-EXCHANGE MEMBRANES;HIGH-SURFACE-AREA;PEM FUEL-CELLS;HIGH-PERFORMANCE;FREE ELECTROCATALYST;EVOLUTION REACTIONS;GRAPHENE,wangchengxmu@xmu.edu.cn; wenbinlin@uchicago.edu,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000372190800017,,China;United States,xmu.edu.cn,Xiamen Univ;Univ Chicago,"Xiamen Univ, China;Univ Chicago, United States","Zhang, Chao; An, Bing; Yang, Ling; Wu, Binbin; Shi, Wei; Wang, Yu-Cheng; Long, La-Sheng; Wang, Cheng; Lin, Wenbin"
"Liu, Q.T., Liu, J.Y., Liu, X.F., Wang, Y., Hong, S., Wu, J.B., Shang, J.X., Yu, R.H., Miao, J.A., Shui, J.L.",Surface activation of platinum group metal clusters for efficient and durable oxygen reduction in proton exchange membrane fuel cells,2023,APPLIED PHYSICS REVIEWS,10,2,021415,,,9,16,10.1063/5.0147165,,"[Liu, Qingtao; Liu, Jieyuan; Liu, Xiaofang; Shang, Jiaxiang; Yu, Ronghai; Shui, Jianglan] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China; [Miao, Jungang] Beihang Univ, Sch Elect & Informat Engn, Beijing 100191, Peoples R China; [Wang, Yu] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China; [Hong, Song] Beijing Univ Chem Technol, Coll Mat Sci & Engn, Beijing 100029, Peoples R China; [Wu, Jianbo] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China; [Shui, Jianglan] Tianmushan Lab, Hangzhou 310023, Peoples R China",,"To develop efficient and durable acidic oxygen-reduction-reaction (ORR) catalysts based on all platinum group metals (PGMs) is crucial for large-scale application of proton-exchange membrane fuel cells (PEMFCs) but challenging. Here, we report a nitrogen coordination-induced strong metal-support interaction that can tune the surface atoms of ORR-inactive PGM clusters into efficient and durable active sites. Taking Rh as an example, the carbonization of Rh-overdoped zeolitic imidazolate framework-8 results in a large number of Rh clusters (with a little atomic Rh) in porous nitrogen-doped carbon. The cluster surface atoms coordinate with the nitrogen of the carbon support, forming much stronger metal-support interactions than that of common N-doped carbon-supported metal nanoparticles. The activity of surface-activated Rh clusters is close to that of Pt/C. The regulation rules for the surface active sites inherit most of the characteristics of the corresponding single-atom catalysts, but without their severe instability problem. This surface activation strategy has also shown applicable to other PGMs, thereby it is a promising way to alleviate the reliance of PEMFCs on platinum.",,N-C ELECTROCATALYST; SINGLE-ATOM; SUPPORT INTERACTIONS; CATALYSTS; PARTICLES; RH,N-C ELECTROCATALYST;SINGLE-ATOM;SUPPORT INTERACTIONS;CATALYSTS;PARTICLES;RH,shuijianglan@buaa.edu.cn,,"1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA",,,,AIP Publishing,1931-9401,,,,English,APPL PHYS REV,Article,WoS,Physics,WOS:001010556100003,2-s2.0-85161038225,China,buaa.edu.cn,Beihang Univ;Chinese Acad Sci;Beijing Univ Chem Technol;Shanghai Jiao Tong Univ;Tianmushan Lab,"Beihang Univ, China;Chinese Acad Sci, China;Beijing Univ Chem Technol, China;Shanghai Jiao Tong Univ, China;Tianmushan Lab, China","Liu, Qingtao; Liu, Jieyuan; Liu, Xiaofang; Wang, Yu; Hong, Song; Wu, Jianbo; Shang, Jiaxiang; Yu, Ronghai; Miao, Jungang; Shui, Jianglan"
"Wang, Y.C., Zhu, P.F., Yang, H., Huang, L., Wu, Q.H., Rauf, M., Zhang, J.Y., Dong, J., Wang, K., Zhou, Z.Y., Sun, S.G.",Surface Fluorination to Boost the Stability of the Fe/N/C Cathode in Proton Exchange Membrane Fuel Cells,2018,CHEMELECTROCHEM,5,14,,1914,1921,8,79,10.1002/celc.201700939,,"[Wang, Yu-Cheng; Zhu, Peng-Fei; Yang, Hong; Rauf, Muhammad; Zhang, Jun-Yu; Dong, Jiao; Wang, Kun; Zhou, Zhi-You; Sun, Shi-Gang] Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Collaborat Innovat Ctr Chem Energy Mat, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China; [Huang, Long] Sinoprecious Met Holding Co Ltd, Kunming 650106, Yunnan, Peoples R China; [Wu, Qi-Hui] Quanzhou Normal Univ, Dept Mat Chem, Sch Chem Engn & Mat Sci, Quanzhou 362000, Peoples R China",,"The ternary Fe/N/C material is a promising non-precious-metal oxygen reduction electrocatalyst for proton exchange membrane cells (PEMFCs). However, its practical application is severely hampered by poor stability under PEMFC working conditions, especially at a cell voltage higher than 0.5 V. Herein, we report a new strategy to significantly improve the stability of the Fe/N/C catalyst in PEMFCs by covalent grafting of a trifluoromethylphenyl (Ar-CF3) group. The hydrophobic character of Ar-CF3 can effectively prevent water flooding of the Fe/N/C catalyst layer, and thus form robust mass-transport channels for gas liquid two-phase flow. Simultaneously, both electron-withdrawing and hydrophobic properties considerably suppress the oxidative corrosion of the carbon matrix that hosts the catalytically active sites. Therefore, fluorinated Fe/N/C could perform stably over 100 h at 0.5 V with a current density of 0.56 A cm(-2) in a H-2-O-2 PEMFC. Even when the cell voltage increased to 0.6 V, only 15% performance was lost after 100 h operation.",fuel cells; oxygen reduction; Fe/N/C; stability; fluorination,OXYGEN REDUCTION REACTION; NONPRECIOUS METAL CATALYST; DOPED GRAPHITE NANOFIBERS; ORGANIC-FRAMEWORK; CARBON-BLACKS; ACIDIC MEDIUM; ELECTROCATALYSTS; EFFICIENT; NITROGEN; POLYMER,fuel cells;oxygen reduction;Fe/N/C;stability;fluorination;OXYGEN REDUCTION REACTION;NONPRECIOUS METAL CATALYST;DOPED GRAPHITE NANOFIBERS;ORGANIC-FRAMEWORK;CARBON-BLACKS;ACIDIC MEDIUM;ELECTROCATALYSTS;EFFICIENT;NITROGEN;POLYMER,zhouzy@xmu.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,2196-0216,,,,English,CHEMELECTROCHEM,Article,WoS,Electrochemistry,WOS:000438339200022,2-s2.0-85035201928,China,xmu.edu.cn,Xiamen Univ;Sinoprecious Met Holding Co Ltd;Quanzhou Normal Univ,"Xiamen Univ, China;Sinoprecious Met Holding Co Ltd, China;Quanzhou Normal Univ, China","Wang, Yu-Cheng; Zhu, Peng-Fei; Yang, Hong; Huang, Long; Wu, Qi-Hui; Rauf, Muhammad; Zhang, Jun-Yu; Dong, Jiao; Wang, Kun; Zhou, Zhi-You; Sun, Shi-Gang"
"Mazzucato, M., Gavioli, L., Balzano, V., Berretti, E., Rizzi, G.A., Badocco, D., Pastore, P., Zitolo, A., Durante, C.",Synergistic Effect of Sn and Fe in Fe-Nx Site Formation and Activity in Fe-N-C Catalyst for ORR,2022,ACS Applied Materials and Interfaces,14,49,,54635,54648,,35,10.1021/acsami.2c13837,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85143484581&doi=10.1021%2Facsami.2c13837&partnerID=40&md5=74ec64bc4eea48b95eedb9f43334a884,"Department of Chemical Sciences, Università degli Studi di Padova, Padua, PD, Italy; Department of Mathematics and Physics, Università Cattolica del Sacro Cuore, Campus di Brescia, Brescia, BS, Italy; Consiglio Nazionale delle Ricerche, Rome, RM, Italy; SOLEIL Synchrotron, Gif-sur-Yvette, France","Mazzucato, Marco, Department of Chemical Sciences, Università degli Studi di Padova, Padua, PD, Italy; Gavioli, Luca, Department of Mathematics and Physics, Università Cattolica del Sacro Cuore, Campus di Brescia, Brescia, BS, Italy; Balzano, Vincenzo, Department of Mathematics and Physics, Università Cattolica del Sacro Cuore, Campus di Brescia, Brescia, BS, Italy; Berretti, E., Consiglio Nazionale delle Ricerche, Rome, RM, Italy; Rizzi, Gian Andrea, Department of Chemical Sciences, Università degli Studi di Padova, Padua, PD, Italy; Badocco, Denis, Department of Chemical Sciences, Università degli Studi di Padova, Padua, PD, Italy; Pastore, Paolo, Department of Chemical Sciences, Università degli Studi di Padova, Padua, PD, Italy; Zitolo, Andrea, SOLEIL Synchrotron, Gif-sur-Yvette, France; Durante, Christian, Department of Chemical Sciences, Università degli Studi di Padova, Padua, PD, Italy","Iron-nitrogen-carbon (Fe-N-C) materials emerged as one of the best non-platinum group material (non-PGM) alternatives to Pt/C catalysts for the electrochemical reduction of O2 in fuel cells. Co-doping with a secondary metal center is a possible choice to further enhance the activity toward oxygen reduction reaction (ORR). Here, classical Fe-N-C materials were co-doped with Sn as a secondary metal center. Sn-N-C according to the literature shows excellent activity, in particular in the fuel cell setup; here, the same catalyst shows a non-negligible activity in 0.5 M H2SO4 electrolyte but not as high as expected, meaning the different and uncertain nature of active sites. On the other hand, in mixed Fe, Sn-N-C catalysts, the presence of Sn improves the catalytic activity that is linked to a higher Fe-N4 site density, whereas the possible synergistic interaction of Fe-N4 and Sn-Nx found no confirmation. The presence of Fe-N4 and Sn-Nx was thoroughly determined by extended X-ray absorption fine structure and NO stripping technique; furthermore, besides the typical voltammetric technique, the catalytic activity of Fe-N-C catalyst was determined and also compared with that of the gas diffusion electrode (GDE), which allows a fast and reliable screening for possible implementation in a full cell. This paper therefore explores the effect of Sn on the formation, activity, and selectivity of Fe-N-C catalysts in both acid and alkaline media by tuning the Sn/Fe ratio in the synthetic procedure, with the ratio 1/2 showing the best activity, even higher than that of the iron-only containing sample (jk = 2.11 vs 1.83 A g-1). Pt-free materials are also tested for ORR in GDE setup in both performance and durability tests. © 2022 The Authors. Published by American Chemical Society.",AEMFC; EXAFS; Fe-N-C; GDE; ORR; PEMFC; Sn-N-C,Catalyst activity; Catalyst selectivity; Diffusion in gases; Durability; Electrolytes; Electrolytic reduction; Iron; Tin; X ray absorption; AEMFC; EXAFS; Fe-N-C; Gas diffusion electrodes; Metal centres; Oxygen reduction reaction; P.E.M.F.C; Secondary metals; Sn-N-C; ]+ catalyst; Proton exchange membrane fuel cells (PEMFC),AEMFC;EXAFS;Fe-N-C;GDE;ORR;PEMFC;Sn-N-C;Catalyst activity;Catalyst selectivity;Diffusion in gases;Durability;Electrolytes;Electrolytic reduction;Iron;Tin;X ray absorption;Gas diffusion electrodes;Metal centres;Oxygen reduction reaction;P.E.M.F.C;Secondary metals;]+ catalyst;Proton exchange membrane fuel cells (PEMFC),"C. Durante; Department of Chemical Sciences, University of Padova, Padova, Via Marzolo 1, 35131, Italy; email: christian.durante@unipd.it",,,,,,American Chemical Society,19448244,,,36468946,English,ACS Appl. Mater. Interfaces,Article,Scopus,,2-s2.0-85143484581,,Italy;France,unipd.it,,,"Mazzucato, M.; Gavioli, L.; Balzano, V.; Berretti, E.; Rizzi, G.A.; Badocco, D.; Pastore, P.; Zitolo, A.; Durante, C."
"Yoon, H.S., Park, H.Y., Jung, W.S.",Synergistic effects of fluorine and nitrogen dopants in fluorine/nitrogen-coordinated iron-co-doped carbon catalysts for enhanced oxygen reduction in alkaline media,2024,International Journal of Hydrogen Energy,60,,,1092,1100,,10,10.1016/j.ijhydene.2024.02.164,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85186123973&doi=10.1016%2Fj.ijhydene.2024.02.164&partnerID=40&md5=9584378809a0db51781b4d2ee5ba768b,"School of Food Biotechnology and Chemical Engineering, Hankyong National University, Anseong, Gyeonggi-do, South Korea; Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul, South Korea; Research Center of Chemical Technology, Hankyong National University, Anseong, Gyeonggi-do, South Korea","Yoon, Ho-seok, School of Food Biotechnology and Chemical Engineering, Hankyong National University, Anseong, Gyeonggi-do, South Korea; Park, Hee Young, Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul, South Korea; Jung, Won Suk, School of Food Biotechnology and Chemical Engineering, Hankyong National University, Anseong, Gyeonggi-do, South Korea, Research Center of Chemical Technology, Hankyong National University, Anseong, Gyeonggi-do, South Korea","The expensiveness of oxygen reduction reaction (ORR) catalyst materials especially Pt has hindered the commercialization of next-generation energy conversion devices including metal–air batteries and polymer electrolyte membrane fuel cells. Fe–N–C has drawn attention as a nonprecious metal catalyst owing to its high but commercially unsatisfactory ORR performance; nevertheless, additional heteroatom co-doping could help augment its ORR activity. Here we report nitrogen/fluorine-coordinated iron-co-doped carbon (Fe@NFC) catalysts with improved ORR performance in alkaline media. The annealing temperature affects the nitrogen/fluorine doping and functional group formation, as ascertained by an analysis of control samples annealed at various temperatures. To assess the synergy between the doped fluorine and nitrogen-coordinated iron, we compare the catalyst annealed at 700 °C (Fe@NFC700) with control samples containing different heteroatom dopants but annealed at 700 °C (Fe@NC, Fe@FC). Fe@NFC700 shows improved ORR kinetics and onset potential than those of Fe@NC and commercial Pt/C, respectively, in alkaline media. © 2024 Hydrogen Energy Publications LLC",Anion exchange membrane fuel cell; Electrocatalyst; Nonprecious metal catalyst; Oxygen reduction reaction,Annealing; Carbon; Electrolytic reduction; Fluorine; Ion exchange membranes; Iron; Nitrogen; Oxygen; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Alkaline media; Anion-exchange membrane fuel cells; Co-doped; Doped carbons; Heteroatoms; Non-precious metal catalysts; Nonprecious-metal catalysts; Oxygen reduction reaction; Reaction performance; ]+ catalyst; Electrocatalysts,Anion exchange membrane fuel cell;Electrocatalyst;Nonprecious metal catalyst;Oxygen reduction reaction;Annealing;Carbon;Electrolytic reduction;Fluorine;Ion exchange membranes;Iron;Nitrogen;Oxygen;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Alkaline media;Anion-exchange membrane fuel cells;Co-doped;Doped carbons;Heteroatoms;Non-precious metal catalysts;Nonprecious-metal catalysts;Reaction performance;]+ catalyst;Electrocatalysts,"W.S. Jung; School of Food Biotechnology and Chemical Engineering, Hankyong National University, Anseong, 327 Jungang-ro, 17579, South Korea; email: jungw@hknu.ac.kr",,,,,,Elsevier Ltd,03603199,0080311393,IJHED,,English,Int J Hydrogen Energy,Article,Scopus,,2-s2.0-85186123973,,South Korea,hknu.ac.kr,,,"Yoon, H.S.; Park, H.-Y.; Jung, W.S."
"Nguyen, Q.H., Zewdie, G.M., Thuc, V.D., Oh, S., Im, K., Kim, D., Shin, H., Lee, L.Y.S., Kim, J.",Synergistic integration of 2D TiN/TiC and Fe single atoms for high-performance and durable oxygen reduction catalysis,2026,JOURNAL OF ENERGY CHEMISTRY,113,,,579,588,10,0,10.1016/j.jechem.2025.09.057,,"[Quoc Hao Nguyen; Oh, Sion; Im, Kyungmin; Lee, Lawrence Yoon Suk; Kim, Jinsoo] Kyung Hee Univ, Dept Chem Engn Integrated Engn, Namyangju Si 17104, Gyeonggi Do, South Korea; [Zewdie, Getasew Mulualem; Shin, Hyeyoung] Chungnam Natl Univ, Grad Sch Energy Sci & Technol GEST, Daejeon 34134, South Korea; [Vu Dong Thuc; Kim, Dukjoon] Sungkyunkwan Univ, Sch Chem Engn, Gyeonggi 16419, South Korea; [Lee, Lawrence Yoon Suk] Hong Kong Polytech Univ, Dept Appl Biol & Chem Technol, Hong Kong 999077, Peoples R China; [Lee, Lawrence Yoon Suk] Hong Kong Polytech Univ, Res Inst Smart Energy, Hong Kong 999077, Peoples R China",,"Iron-based single-atom (SA) catalysts offer a promising alternative to noble-metal catalysts for the oxygen reduction reaction (ORR), yet their limited intrinsic activity and durability hinder practical energy device applications. Herein, we introduce a novel TiN/TiC-supported Fe SA catalyst (TiNC/Fe-NC) with a hierarchical heterostructure that synergistically enhances Fe-Nx site activity and accessibility. The TiNC/Fe-NC catalyst achieves outstanding ORR performances, with half-wave potentials (E1/2) of 0.852 V in acidic media and 0.942 V in alkaline media. Theoretical simulations reveal that strong electronic interaction and efficient charge transfer between TiNC and Fe-Nx sites optimize the adsorption energetics of key ORR intermediates, driving the enhanced activity. Remarkably, TiNC effectively scavenges reactive oxygen radicals generated at the Fe centers, ensuring exceptional durability with a minimal 28 mV loss in E1/2 after 10,000 cycles at 80 degrees C in acid media. In practical applications, TiNC/Fe-NC delivers peak power densities of 306 mW cm-2 in zinc-air battery and 732 mW cm-2 in proton exchange membrane fuel cells, with remarkable long-term stability. This work establishes TiNC/Fe-NC as a highperformance, durable catalyst for advanced energy storage and conversion technologies. (c) 2025 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights are reserved, including those for text and data mining, AI training, and similar technologies.",Heterostructured catalysts; Oxygen reduction reaction; Single atom catalysts; Radical scavenger; Zinc-air battery; Proton exchange membrane fuel cell,SITES; NANOPARTICLES; DURABILITY,Heterostructured catalysts;Oxygen reduction reaction;Single atom catalysts;Radical scavenger;Zinc-air battery;Proton exchange membrane fuel cell;SITES;NANOPARTICLES;DURABILITY,shinhy@cnu.ac.kr; lawrence.ys.lee@polyu.edu.hk; jkim21@khu.ac.kr,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2095-4956,,,,English,J ENERGY CHEM,Article,WoS,Chemistry; Energy & Fuels; Engineering,WOS:001606821400001,2-s2.0-105019266443,South Korea;China,cnu.ac.kr,Kyung Hee Univ;Chungnam Natl Univ;Sungkyunkwan Univ;Hong Kong Polytech Univ,"Kyung Hee Univ, South Korea;Chungnam Natl Univ, South Korea;Sungkyunkwan Univ, South Korea;Hong Kong Polytech Univ, China","Quoc Hao Nguyen; Zewdie, Getasew Mulualem; Vu Dong Thuc; Oh, Sion; Im, Kyungmin; Kim, Dukjoon; Shin, Hyeyoung; Lee, Lawrence Yoon Suk; Kim, Jinsoo"
"Ni, W., Meibom, J.L., Hassan, N.U., Chang, M., Chu, Y.C., Krammer, A., Sun, S., Zheng, Y., Bai, L., Ma, W., Lee, S., Jin, S., Luterbacher, J.S., Schuler, A., Chen, H.M., Mustain, W.E., Hu, X.",Synergistic interactions between PtRu catalyst and nitrogen-doped carbon support boost hydrogen oxidation,2023,Nature Catalysis,6,9,,773,783,,131,10.1038/s41929-023-01007-1,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85169165117&doi=10.1038%2Fs41929-023-01007-1&partnerID=40&md5=06d334c57818e33f09180226d696bb0c,"Laboratory of Inorganic Synthesis and Catalysis, Institut des Sciences et Ingénierie Chimiques, Lausanne, Switzerland; Molinaroli College of Engineering and Computing, Columbia, SC, United States; Department of Chemistry, National Taiwan University, Taipei, Taiwan; Solar Energy and Building Physics Laboratory, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland; Laboratory of Sustainable and Catalytic Processing, Institut des Sciences et Ingénierie Chimiques, Lausanne, Switzerland; Department of Chemical Engineering, Changwon National University, Changwon, Gyeongsangnam-do, South Korea","Ni, Weiyan, Laboratory of Inorganic Synthesis and Catalysis, Institut des Sciences et Ingénierie Chimiques, Lausanne, Switzerland; Meibom, Josephine Lederballe, Laboratory of Inorganic Synthesis and Catalysis, Institut des Sciences et Ingénierie Chimiques, Lausanne, Switzerland; Hassan, Noor Ul, Molinaroli College of Engineering and Computing, Columbia, SC, United States; Chang, Miyeon, Laboratory of Inorganic Synthesis and Catalysis, Institut des Sciences et Ingénierie Chimiques, Lausanne, Switzerland; Chu, You Chiuan, Department of Chemistry, National Taiwan University, Taipei, Taiwan; Krammer, Anna, Solar Energy and Building Physics Laboratory, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland; Sun, Songlan, Laboratory of Sustainable and Catalytic Processing, Institut des Sciences et Ingénierie Chimiques, Lausanne, Switzerland; Zheng, Yiwei, Laboratory of Inorganic Synthesis and Catalysis, Institut des Sciences et Ingénierie Chimiques, Lausanne, Switzerland; Bai, Lichen, Laboratory of Inorganic Synthesis and Catalysis, Institut des Sciences et Ingénierie Chimiques, Lausanne, Switzerland; Ma, Wenchao, Laboratory of Inorganic Synthesis and Catalysis, Institut des Sciences et Ingénierie Chimiques, Lausanne, Switzerland; Lee, Seunghwa, Laboratory of Inorganic Synthesis and Catalysis, Institut des Sciences et Ingénierie Chimiques, Lausanne, Switzerland, Department of Chemical Engineering, Changwon National University, Changwon, Gyeongsangnam-do, South Korea; Jin, Seongmin, Laboratory of Sustainable and Catalytic Processing, Institut des Sciences et Ingénierie Chimiques, Lausanne, Switzerland; Luterbacher, Jeremy S., Laboratory of Sustainable and Catalytic Processing, Institut des Sciences et Ingénierie Chimiques, Lausanne, Switzerland; Schüler, Andreas M., Solar Energy and Building Physics Laboratory, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland; Chen, Hao Ming, Department of Chemistry, National Taiwan University, Taipei, Taiwan; Mustain, William E., Molinaroli College of Engineering and Computing, Columbia, SC, United States; Hu, Xile, Laboratory of Inorganic Synthesis and Catalysis, Institut des Sciences et Ingénierie Chimiques, Lausanne, Switzerland","Hydroxide exchange membrane fuel cell (HEMFC) is a potentially cost-effective energy conversion technology. However, current state-of-the-art HEMFCs require a high loading of platinum-group-metal (PGM) catalysts, especially for the hydrogen oxidation reaction. Here we develop a porous nitrogen-doped carbon-suppported PtRu hydrogen oxidation reaction catalyst (PtRu/pN-C) that has a high intrinsic and mass activity in alkaline condition. Spectroscopic and microscopic data indicate the presence of Pt single atoms in addition to PtRu nanoparticles on pN-C. Mechanistic study suggests Ru modulates the electronic structure of Pt for an optimized hydrogen binding energy, while Pt single atoms on pN-C optimize the interfacial water structure. These synergetic interactions are responsible for the high catalytic activity of this catalyst. An HEMFC with a low loading of this catalyst and a commercial Fe–N–C oxygen reduction reaction catalyst achieves a high PGM utilization rate. The current density at 0.65 V of this HEMFC reaches 1.5 A cm−2, exceeding the US Department of Energy 2022 target (1 A cm−2) by 50%. [Figure not available: see fulltext.] © 2023, The Author(s), under exclusive licence to Springer Nature Limited.",,Binding energy; Carbon; Catalyst activity; Cost effectiveness; Doping (additives); Electrocatalysts; Electrolytic reduction; Electronic structure; Nitrogen; Oxidation; Platinum; Platinum alloys; Proton exchange membrane fuel cells (PEMFC); Carbon support; Hydrogen oxidation reaction; Hydroxide exchange membranes; Membrane fuel cells; Nitrogen-doped carbons; Platinum group metals; PtRu catalysts; Single-atoms; Synergistic interaction; ]+ catalyst; Binary alloys,Binding energy;Carbon;Catalyst activity;Cost effectiveness;Doping (additives);Electrocatalysts;Electrolytic reduction;Electronic structure;Nitrogen;Oxidation;Platinum;Platinum alloys;Proton exchange membrane fuel cells (PEMFC);Carbon support;Hydrogen oxidation reaction;Hydroxide exchange membranes;Membrane fuel cells;Nitrogen-doped carbons;Platinum group metals;PtRu catalysts;Single-atoms;Synergistic interaction;]+ catalyst;Binary alloys,"X. Hu; Laboratory of Inorganic Synthesis and Catalysis, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland; email: xile.hu@epfl.ch; W.E. Mustain; Department of Chemical Engineering, University of South Carolina, Columbia, United States; email: MUSTAINW@mailbox.sc.edu",,,,,,Nature Research,,,NCAAC,,English,Nat. Catal.,Article,Scopus,,2-s2.0-85169165117,,Switzerland;United States;Taiwan;South Korea,epfl.ch,,,"Ni, W.; Meibom, J.L.; Hassan, N.U.; Chang, M.; Chu, Y.-C.; Krammer, A.; Sun, S.; Zheng, Y.; Bai, L.; Ma, W.; Lee, S.; Jin, S.; Luterbacher, J.S.; Schuler, A.; Chen, H.M.; Mustain, W.E.; Hu, X."
"Chen, M.H., Chen, Y.T., Yang, Z.L., Luo, J., Cai, J.L., Jung, J.C.Y., Zhang, J.J., Chen, S.L., Zhang, S.M.",Synergy of staggered stacking confinement and microporous defect fixation for high-density atomic FeII-N4 oxygen reduction active sites,2022,CHINESE JOURNAL OF CATALYSIS,43,7,,1870,1878,9,14,10.1016/S1872-2067(21)63992-X,,"[Chen, Menghui; Yang, Zhili; Cai, Jialin; Jung, Joey Chung-Yen; Zhang, Jiujun; Zhang, Shiming] Shanghai Univ, Inst Sustainable Energy, Coll Sci, Shanghai 200444, Peoples R China; [Chen, Yongting; Luo, Jin; Chen, Shengli] Wuhan Univ, Coll Chem & Mol Sci, Hubei Key Lab Elect Power Sources, Wuhan 430072, Hubei, Peoples R China",,"The development of high-performance nonprecious metal catalysts (NPMCs) to supersede Pt-based catalysts for the oxygen reduction reaction (ORR) in polymer electrolyte membrane fuel cells is highly desirable but remains challenging. In this paper, we present a pyrolysis strategy for spatial confinement and active-site fixation using iron phthalocyanine (FePc), phthalocyanine (Pc) and Zn salts as precursors. In the obtained carbon-based NPMC with a hierarchically porous nanostructure of thin-layered carbon nanosheets, nearly 100% of the total Fe species are Fe-II-N-4 active sites. In contrast, pyrolyzing FePc alone forms Fe-based nanoparticles embedded in amorphous carbon with only 5.9% Fe-II-N-4 active sites. Both experimental characterization and density functional theory calculations reveal that spatial confinement through the staggered - stacking of Pc macrocycles effectively prevents the demetallation of Fe atoms and the formation of Fe-based nanoparticles via aggregation. Furthermore, Zn-induced microporous defects allow the fixation of Fe-II-N-4 active sites. The synergistic effect of staggered stacking confinement and microporous defect fixation results in a high density of atomic Fe-II-N-4 active sites that can enhance the ORR. The optimal Fe-II-N-4-C electrocatalyst outperforms a commercial Pt/C catalyst in terms of half-wave potential, methanol tolerance, and long-term stability in alkaline media. This modulation strategy can greatly advance efforts to develop high-performance NPMCs. (C) 2022, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.",Oxygen reduction reaction; Synergy strategy; Staggered stacking confinement; Microporous defects fixation; Fe-II-N-4,DOPED CARBON MATERIALS; PEM FUEL-CELL; MOSSBAUER-SPECTROSCOPY; FE/N/C CATALYSTS; FE; IRON; ELECTROCATALYST; ORR; PHTHALOCYANINE; IDENTIFICATION,Oxygen reduction reaction;Synergy strategy;Staggered stacking confinement;Microporous defects fixation;Fe-II-N-4;DOPED CARBON MATERIALS;PEM FUEL-CELL;MOSSBAUER-SPECTROSCOPY;FE/N/C CATALYSTS;FE;IRON;ELECTROCATALYST;ORR;PHTHALOCYANINE;IDENTIFICATION,slchen@whu.edu.cn; smzhang@shu.edu.cn,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0253-9837,,,,English,CHINESE J CATAL,Article,WoS,Chemistry; Engineering,WOS:000809667100002,2-s2.0-85130496618,China,whu.edu.cn,Shanghai Univ;Wuhan Univ,"Shanghai Univ, China;Wuhan Univ, China","Chen, Menghui; Chen, Yongting; Yang, Zhili; Luo, Jin; Cai, Jialin; Jung, Joey Chung-Yen; Zhang, Jiujun; Chen, Shengli; Zhang, Shiming"
"Wan, X., Chen, W.Q., Yang, J.R., Liu, M.C., Liu, X.F., Shui, J.L.",Synthesis and Active Site Identification of Fe-N-C Single-Atom Catalysts for the Oxygen Reduction Reaction,2019,CHEMELECTROCHEM,6,2,,304,315,12,70,10.1002/celc.201801302,,"[Wan, Xin; Chen, Weiqi; Yang, Jiarui; Liu, Mengchan; Liu, Xiaofang; Shui, Jianglan] Beihang Univ, Sch Mat Sci & Engn, 37 Xueyuan Rd, Beijing 100083, Peoples R China",,"Fe-N-C catalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs) are still inferior to the Pt catalysts. The major downsides of Fe-N-C are the low density and ambiguous structural identification of active sites. Fe-N-C single-atom catalysts (SACs) have shown great potential for maximizing the active site density and can serve as ideal platforms for investigating the nature of active sites. This review starts with a summary of the latest progress in the synthetic strategy for Fe-N-C SACs, followed by an introduction to the active site identification by atomic-resolution techniques and electrochemical analyses. Finally, the major challenges are highlighted, and the prospective directions are proposed to guide the development of high-performance Fe-N-C catalysts.",active moieties; Fe-N-C; fuel cells; oxygen reduction reaction; single-atom catalysts,METAL-ORGANIC FRAMEWORK; HIGH-PERFORMANCE ELECTROCATALYSTS; EFFICIENT OXYGEN; FE/N/C-CATALYSTS; CARBON NANOTUBES; POROUS CARBONS; ORR CATALYST; DOPED CARBON; FUEL-CELL; IRON,active moieties;Fe-N-C;fuel cells;oxygen reduction reaction;single-atom catalysts;METAL-ORGANIC FRAMEWORK;HIGH-PERFORMANCE ELECTROCATALYSTS;EFFICIENT OXYGEN;FE/N/C-CATALYSTS;CARBON NANOTUBES;POROUS CARBONS;ORR CATALYST;DOPED CARBON;FUEL-CELL;IRON,shuijianglan@buaa.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,2196-0216,,,,English,CHEMELECTROCHEM,Review,WoS,Electrochemistry,WOS:000456207200003,2-s2.0-85056155635,China,buaa.edu.cn,Beihang Univ,"Beihang Univ, China","Wan, Xin; Chen, Weiqi; Yang, Jiarui; Liu, Mengchan; Liu, Xiaofang; Shui, Jianglan"
"Zhang, S., Luo, M., Zhu, H., Wang, F.",Synthesis and characterization of a nitrogen-doped polyaniline-carbon catalyst,2014,Beijing Huagong Daxue Xuebao (Ziran Kexueban)/Journal of Beijing University of Chemical Technology (Natural Science Edition),41,6,,58,63,,0,,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84912529273&partnerID=40&md5=6b378eaff530f74ce0114264e5ca211b,"School of Sciences, Beijing University of Chemical Technology, Beijing, China","Zhang, Shuo, School of Sciences, Beijing University of Chemical Technology, Beijing, China; Luo, Mingchuan, School of Sciences, Beijing University of Chemical Technology, Beijing, China; Zhu, Hong, School of Sciences, Beijing University of Chemical Technology, Beijing, China; Wang, Fanghui, School of Sciences, Beijing University of Chemical Technology, Beijing, China","Polyaniline (PANI) has been used as a precursor to prepare PANI-FeCo-C, PANI-Fe-C, PANI-Co-C and PANI-C non-precious metal catalysts by a soft template method for use in proton exchange membrane fuel cells (PEMFC). Electrochemical measurements show that the PANI-Fe-C catalyst has a higher electrocatalytic activity than the other three catalysts. The ORR onset potential of the PANI-Fe-C catalyst is measured to be 0.87 V. X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) show that the PANI-Fe-C catalyst contains more carbon lattice distortion and graphitic nitrogen than the others, which provides a good explanation for its excellent ORR performance.",Fuel cell; Graphitic-N; Non-noble metal electrocatayst; Oxygen reduction reaction; Polyaniline,,Fuel cell;Graphitic-N;Non-noble metal electrocatayst;Oxygen reduction reaction;Polyaniline,,,,,,,Beijing University of Chemical Technology,16714628,,,,Chinese,Beijing Huagong Daxue Xuebao,Article,Scopus,,2-s2.0-84912529273,,China,No email,,,"Zhang, S.; Luo, M.; Zhu, H.; Wang, F."
"Zhang, H.J., Yuan, X.X., Sun, L.L., Yang, J.H., Ma, Z.F., Shao, Z.P.",Synthesis and characterization of non-precious metal binary catalyst for oxygen reduction reaction in proton exchange membrane fuel cells,2012,ELECTROCHIMICA ACTA,77,,,324,329,6,26,10.1016/j.electacta.2012.06.011,,"[Zhang, Hui-Juan; Yang, Junhe] Shanghai Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200093, Peoples R China; [Zhang, Hui-Juan; Yuan, Xianxia; Ma, Zi-Feng] Shanghai Jiao Tong Univ, Dept Chem Engn, Shanghai 200240, Peoples R China; [Sun, Liangliang; Shao, Zongping] Nanjing Univ Technol, Sch Chem & Chem Engn, Nanjing 210009, Peoples R China",,"A promising non-precious metal FeCoTETA/C catalyst has been easily synthesized, by chelating Fe and Co with triethylenetetramine (TETA) in ethanol followed by pyrolyzing in an Ar atmosphere, as electrocatalyst for oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). The catalyst has been characterized with various physicochemical techniques as well as electrochemical analysis and single cell performance measurement. The results showed that nano-intermetallic FeCo particles and several types of Nand 0 species are present on carbon matrix. The catalyst delivers better electrocatalytic activity toward ORR compared with CoTETA/C catalyst, the %H2O2 is about 10% with an electron-transfer number of around 3.8. The PEMFC with this catalyst in cathode reaches a maximum power density of 256 mWcm(-2) and has a current density of 514 mA cm(-2) at 500 mV. 2012 Elsevier Ltd. All rights reserved.",Non-precious metal catalyst; FeCoTETA/C; Oxygen reduction reaction; Proton exchange membrane fuel cells (PEMFCs),FE-BASED CATALYSTS; CARBON; ELECTROCATALYSTS; PERFORMANCE; IRON; PYROLYSIS; SITE,Non-precious metal catalyst;FeCoTETA/C;Oxygen reduction reaction;Proton exchange membrane fuel cells (PEMFCs);FE-BASED CATALYSTS;CARBON;ELECTROCATALYSTS;PERFORMANCE;IRON;PYROLYSIS;SITE,yuanxx@sjtu.edu.cn; zfma@sjtu.edu.cn,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000307131300046,2-s2.0-84863725094,China,sjtu.edu.cn,Shanghai Univ Sci & Technol;Shanghai Jiao Tong Univ;Nanjing Univ Technol,"Shanghai Univ Sci & Technol, China;Shanghai Jiao Tong Univ, China;Nanjing Univ Technol, China","Zhang, Hui-Juan; Yuan, Xianxia; Sun, Liangliang; Yang, Junhe; Ma, Zi-Feng; Shao, Zongping"
"Choi, J.H.",Synthesis and Characterization of Non-precious Metal Co-PANI-C Catalysts for Polymer Electrolyte Membrane Fuel Cell Cathodes,2013,JOURNAL OF THE KOREAN ELECTROCHEMICAL SOCIETY,16,1,,52,58,7,0,10.5229/JKES.2013.16.1.52,,"[Choi, Jong-Ho] Kyungil Univ, Dept New & Renewable Energy, Gyongsan 712701, South Korea",,"In order to overcome the cost issue for commercialization of polymer electrolyte membrane fuel cell (PEMFC), this research was conducted for replacing platinum cathode catalyst with non-precious metal catalyst. The non-precious metal catalyst (Co-PANI-C) was synthesized by the simple reduction method with polyaniline (PANI), carbon black, and cobalt precursor without any heat treatment. Characterization of new Co-PANI-C composite catalysts was done by the measurement of X-ray diffraction (XRD) and thermogravimetric analysis (TGA) for structure analysis and performed by rotating disk electrode (RDE) and rotating ring disk electrode (RRDE) for electrochemical analysis. As a result, Co-PANI-C catalyst showed 60 mV lower on-set potential for oxygen reduction reaction (ORR) than Pt/C catalyst, but the overall reduction current of Co-PANIC catalysts by ORR was still smaller than that of Pt/C. In addition, the ORR behavior of CoPANI-C catalysts depending on the rotation speed of electrode and the stability of Co-PANI-C catalyst under potential cycling and the performance of fuel cell conditions are also discussed.",Non-precious metal catalyst; Polyaniline; Cobalt; Oxygen reduction reaction,,Non-precious metal catalyst;Polyaniline;Cobalt;Oxygen reduction reaction,jchoi@kiu.ac.kr,,"RM 1715, 122 WANGSAN-RO, DONGDAEMUN-GU, SEOUL, 130-070, SOUTH KOREA",,,,KOREAN ELECTROCHEMICAL SOC,1229-1935,,,,Chinese,J KOREAN ELECTROCHEM,Article,WoS,Electrochemistry,WOS:000410473500007,,South Korea,kiu.ac.kr,Kyungil Univ,"Kyungil Univ, South Korea","Choi, Jong-Ho"
"Chung, H.T., Johnston, C.M., Zelenay, P.","Synthesis and Evaluation of Heat-treated, Cyanamide-derived Non-precious Catalysts for Oxygen Reduction",2009,PROTON EXCHANGE MEMBRANE FUEL CELLS 9,25,1,,485,492,8,36,10.1149/1.3210598,,"[Chung, Hoon T.; Johnston, Christina M.; Zelenay, Piotr] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA",,"Metal-nitrogen-carbon type (M-N-C type) non-precious catalysts have been prepared using cyanamide as the nitrogen precursor and pyrolysis to improve the activity and stability. Good activity has been observed for the best catalyst prepared with 1050 degrees C pyrolysis: E-1/2 = 0.77 V by RDE, and current density = 80 mA at 0.80 V in H-2/O-2 fuel cell testing. M-N-C catalysts prepared using cyanamide as a nitrogen source show a complex dependence of activity on pyrolysis temperature: first increasing (up to 900 degrees C), then decreasing (1000 degrees C), before increasing again (1050 degrees C). The reappearance of activity may relate to an increase in defects induced at higher temperature, such as a greater exposure of the edges of graphene planes. The increased hydrophilicity of the sample after pyrolysis at 1050 degrees C suggests this outcome. Further study will be required to confirm the hypothesis.",,PEM FUEL-CELLS; FE-BASED CATALYSTS; NITROGEN-CONTAINING CARBON; O-2 REDUCTION; ELECTROCHEMICAL REDUCTION; ACTIVE-SITES; PRECURSORS; ELECTROLYTE; PYROLYSIS; PORPHYRIN,PEM FUEL-CELLS;FE-BASED CATALYSTS;NITROGEN-CONTAINING CARBON;O-2 REDUCTION;ELECTROCHEMICAL REDUCTION;ACTIVE-SITES;PRECURSORS;ELECTROLYTE;PYROLYSIS;PORPHYRIN,,"Fuller, T; Uchida, H; Strasser, P; Shirvanian, P; Lamy, C; Hartnig, C; Gasteiger, HA; Zawodzinski, T; Jarvi, T; Bele, P; Ramani, V; Cleghorn, S; Jones, D; Zelenay, P","65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA",9th Proton Exchange Membrane Fuel Cell Symposium (PEMFC) Conducted Under the Auspices of the 216th Meeting of the Electrochemical-Society-Inc,"Vienna, AUSTRIA","OCT 04-09, 2009",ELECTROCHEMICAL SOC INC,1938-5862,978-1-60768-088-8,,,English,ECS TRANSACTIONS,Proceedings Paper,WoS,Electrochemistry; Energy & Fuels,WOS:000329585500045,2-s2.0-77649265025,United States,No email,Los Alamos Natl Lab,"Los Alamos Natl Lab, United States","Chung, Hoon T.; Johnston, Christina M.; Zelenay, Piotr"
"Zhang, J., Long, T., Li, G., Hou, Y., Xu, C., Wu, Y.",Synthesis and oxygen reduction performance study of bimetallic Co/Fe-N-C catalysts; 双金属Co/Fe-N-C 催化剂合成及氧还原性能研究,2024,Gongneng Cailiao/Journal of Functional Materials,55,8,,8143,8169,,2,10.3969/j.issn.1001-9731.2024.08.019,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85206298905&doi=10.3969%2Fj.issn.1001-9731.2024.08.019&partnerID=40&md5=736905e2ba14f365a683fdb9410f3803,"College of Materials Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong, China","Zhang, Jun, College of Materials Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong, China; Long, Tao, College of Materials Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong, China; Li, Guanghuan, College of Materials Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong, China; Hou, Yaqing, College of Materials Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong, China; Xu, Chunqian, College of Materials Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong, China; Wu, Yun, College of Materials Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong, China","Proton exchange membrane fuel cells (PEMFCs) have not been applied on a large scale due to their expensive platinum-based catalysts and scarce resources. Metal-nitrogen doped carbon (M-N-C, M=Fe, Ni, Mn, Co) monoatom-ic catalysts have been considered as promising catalysts for oxygen reduction reaction (ORR), among which Fe-N-C catalysts have high catalytic activity for oxygen reduction in acidic media with low cost. However, most of the reported Fe-N-C catalysts arc still not as good as the platinum-based catalysts in fuel cells and have poor stability in acidic media rather than being widely used. Here, we reported a method for constructing Fc-N,. and Co-N, catalysts on a stable and highly graphitic NC support pyrolyzed from ZIF-67. The obtained Co/Fe-N-C diatomic catalyst achieved an onset potential (£„„„) of 0.96 V (vs. RHE) and a half-wave potential (E1/2) of 0.79 V (vs. RHE), with more remarkable stability and superior ORR activity compared with the Fe-N-C and Co-N-C catalysts, providing a new insight into enhance the activity and durability of Fe-N-C catalysts. © 2024 Journal of Functional Materials. All rights reserved.",active site; bimetallic catalyst; nitrogen-doped carbon; oxygen reduction reaction; Proton exchange membrane fuel cell,,active site;bimetallic catalyst;nitrogen-doped carbon;oxygen reduction reaction;Proton exchange membrane fuel cell,"G. Li; College of Materials Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, China; email: guanghuanli@163.com; Y. Wu; College of Materials Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, China; email: haiyunjituan@163.com",,,,,,Journal of Functional Materials,10019731,,GOCAE,,Chinese,Gongneng Cailiao,Article,Scopus,,2-s2.0-85206298905,,China,163.com,,,"Zhang, J.; Long, T.; Li, G.; Hou, Y.; Xu, C.; Wu, Y."
"Wang, T., Cheng, D., Feng, C.Q., Wu, H.M., Zhang, G.X.",Synthesis and properties towards oxygen reduction reaction of transition metal selenides,2020,IONICS,26,3,,1337,1345,9,2,10.1007/s11581-019-03298-6,,"[Wang, Tuo; Cheng, Di; Feng, Chuanqi; Wu, Huimin] Hubei Univ, Hubei Collaborat Innovat Ctr Adv Organ Chem, Hubei Key Lab Polymer Mat,Coll Chem & Chem Engn, Natl & Local Joint Engn Res Ctr High Throughput D, Wuhan 430062, Peoples R China; [Wang, Tuo; Cheng, Di; Feng, Chuanqi; Wu, Huimin] Hubei Univ, Minist Educ,Key Lab Synth & Applicat Organ Funct, Hubei Key Lab Polymer Mat,Coll Chem & Chem Engn, Natl & Local Joint Engn Res Ctr High Throughput D, Wuhan 430062, Peoples R China; [Wu, Huimin] Huanggang Normal Univ, Hubei Key Lab Proc & Applicat Catalyt Mat, Huanggang 438000, Peoples R China; [Zhang, Guangxue] Hubei Univ Sci & Technol, Sch Nucl Technol & Chem & Biol, Xianning 437100, Peoples R China",,"In this work, Ni-Se-x (x is the feed ratios) (x = 30, 40, 45, 50.5, 55, 56.8, 60, 66.7, 80) is synthesized by a solvothermal method. The scanning electron microscopy shows that the Ni-Se-60 exhibits a fluffy petal-like surface. Electrochemical tests, such as cyclic voltammetry, electrochemical impedance spectra, liner sweep voltammetry, and chronoamperometry, show that the catalytic activity of Ni-Se-60 towards oxygen reduction reaction is better than that of other transition metal selenides. Ni-Se-60 has obvious redox peak (peak potential is 0.31 V), higher initial potential (0.739 V) and half-wave potential (0.568 V), lower charge transfer resistance, and better stability. Furthermore, Ni-Se-60 has better tolerance to methanol, ethanol, and ethylene glycol than Pt/C.",Proton exchange membrane fuel cell; Electrocatalysis; Oxygen reduction reaction; Non-precious metal catalysts; Transition metal selenide,DOPED GRAPHENE; CATALYSTS; EVOLUTION; CARBON; PERFORMANCE; HYDROGEN; ELECTROCATALYSTS; NANOPARTICLES; NANOCOMPOSITE; NITROGEN,Proton exchange membrane fuel cell;Electrocatalysis;Oxygen reduction reaction;Non-precious metal catalysts;Transition metal selenide;DOPED GRAPHENE;CATALYSTS;EVOLUTION;CARBON;PERFORMANCE;HYDROGEN;ELECTROCATALYSTS;NANOPARTICLES;NANOCOMPOSITE;NITROGEN,whm267@hubu.edu.cn; 953969684@qq.com,,"TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY",,,,SPRINGER HEIDELBERG,0947-7047,,,,English,IONICS,Article,WoS,Chemistry; Electrochemistry; Physics,WOS:000526426800029,2-s2.0-85075463889,China,hubu.edu.cn,Hubei Univ;Huanggang Normal Univ;Hubei Univ Sci & Technol,"Hubei Univ, China;Huanggang Normal Univ, China;Hubei Univ Sci & Technol, China","Wang, Tuo; Cheng, Di; Feng, Chuanqi; Wu, Huimin; Zhang, Guangxue"
"Li, Y., Wang, F., Zhu, H.",Synthesis of a nitrogen-doped MnCo2O4-C catalyst via pyrolysis of polyaniline for use in the oxygen reduction reaction,2015,Beijing Huagong Daxue Xuebao (Ziran Kexueban)/Journal of Beijing University of Chemical Technology (Natural Science Edition),42,4,,50,56,,1,,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938346251&partnerID=40&md5=0db817b3918aee9eac1030751f70a462,"State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China","Li, Ying, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China; Wang, Fanghui, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China; Zhu, Hong, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China","A novel non-precious metal cathode catalyst, MnCo<inf>2</inf>O<inf>4</inf>/N-C, for use in the oxygen reduction reaction (ORR) in alkaline polymer electrolyte membrane fuel cells, has been synthesized via the pyrolysis of polyaniline. A series of MnCo<inf>2</inf>O<inf>4</inf>/N-C catalysts were prepared at different temperatures. These catalysts were characterized by XRD, Raman spectroscopy, XPS and LSV. The results indicate that the catalyst with 15% MnCo<inf>2</inf>O<inf>4</inf> loading prepared at 900 ℃ has a higher electrocatalytic activity than others and the ORR onset potential of the catalyst is 0.90 V. This catalyst contains more graphitic carbon and nitrogen than the others, which is an important factor in giving the material a higher electrocatalytic activity. ©, 2015, Beijing University of Chemical Technology. All right reserved.",Graphitic; MnCo2O4/N-C; Non-precious metal catalysts; Oxygen reduction reaction; Pyrolysis method,,Graphitic;MnCo2O4/N-C;Non-precious metal catalysts;Oxygen reduction reaction;Pyrolysis method,"H. Zhu; State Key Laboratory of Chemical Resource Engineering, School of Science, Beijing University of Chemical Technology, Beijing, 100029, China; email: zhuho128@126.com",,,,,,Beijing University of Chemical Technology xuebao@buct.edu.cn,16714628,,,,Chinese,Beijing Huagong Daxue Xuebao,Article,Scopus,,2-s2.0-84938346251,,China,126.com,,,"Li, Y.; Wang, F.; Zhu, H."
"Li, S., Zhang, L., Kim, J., Pan, M., Shi, Z., Zhang, J.",Synthesis of carbon-supported binary FeCo-N non-noble metal electrocatalysts for the oxygen reduction reaction,2010,Electrochimica Acta,55,24,,7346,7353,,90,10.1016/j.electacta.2010.07.020,https://www.scopus.com/inward/record.uri?eid=2-s2.0-77956475328&doi=10.1016%2Fj.electacta.2010.07.020&partnerID=40&md5=fda1332f1ba7fd0c4e3d84b102074a06,"Institute for Fuel Cell Innovation, National Research Council Canada, Ottawa, ON, Canada; Wuhan University of Technology, Wuhan, Hubei, China","Li, Shang, Institute for Fuel Cell Innovation, National Research Council Canada, Ottawa, ON, Canada, Wuhan University of Technology, Wuhan, Hubei, China; Zhang, Lei, Institute for Fuel Cell Innovation, National Research Council Canada, Ottawa, ON, Canada; Kim, Jenny, Institute for Fuel Cell Innovation, National Research Council Canada, Ottawa, ON, Canada; Pan, Mu, Wuhan University of Technology, Wuhan, Hubei, China; Shi, Zheng, Institute for Fuel Cell Innovation, National Research Council Canada, Ottawa, ON, Canada; Zhang, Jiujun, Institute for Fuel Cell Innovation, National Research Council Canada, Ottawa, ON, Canada","In this paper, a carbon-supported binary FeCo-N/C catalyst using tripyridyl triazine (TPTZ) as the complex ligand was successfully synthesized. The FeCo-TPTZ complex was then heat-treated at 600 °C, 700 °C, 800 °C, and 900 °C to optimize its oxygen reduction reaction (ORR) activity. It was found that the 700 °C heat-treatment yielded the most active FeCo-N/C catalyst for the ORR. XRD, EDX, TEM, XPS, and cyclic voltammetry techniques were used to characterize the structural changes in these catalysts after heat-treatment, including the total metal loading and the mole ratio of Fe to Co in the catalyst, the possible structures of the surface active sites, and the electrochemical activity. XPS analysis revealed that Co-N<inf>x</inf>, Fe-N <inf>x</inf>, and C-N were present on the catalyst particle surface. To assess catalyst ORR activity, quantitative evaluations using both RDE and RRDE techniques were carried out, and several kinetic parameters were obtained, including overall ORR electron transfer number, electron transfer coefficient in the rate-determining step (RDS), electron transfer rate constant in the RDS, exchange current density, and mole percentage of H<inf>2</inf>O<inf>2</inf> produced in the catalyzed ORR. The overall electron transfer number for the catalyzed ORR was ∼3.88, with H<inf>2</inf>O<inf>2</inf> production under 10%, suggesting that the ORR catalyzed by FeCo-N/C catalyst is dominated by a 4-electron transfer pathway that produces H<inf>2</inf>O. The stability of the binary FeCo-N/C catalyst was also tested using single Fe-N/C and Co-N/C catalysts as baselines. The experimental results clearly indicated that the binary FeCo-N/C catalyst had enhanced activity and stability towards the ORR. Based on the experimental results, a possible mechanism for ORR performance enhancement using a binary FeCo-N/C catalyst is proposed and discussed. © 2010 Elsevier Ltd. All rights reserved.","2,4,6-Tris(2-pyridyl)-1,3,5-triazine (TPTZ); Binary iron (Fe)/cobalt (Co)-nitrogen (N); Non-noble metal electrocatalyst; Oxygen reduction reaction (ORR); Proton exchange membrane (PEM) fuel cell",Binary iron (Fe)/cobalt (Co)-nitrogen (N); Noble metals; Oxygen reduction reaction (ORR); Proton exchange membrane (PEM) fuel cell; Pyridyl; Catalysis; Cobalt; Cyclic voltammetry; Electrocatalysts; Electrolytic reduction; Electron transitions; Ionic liquids; Metals; Oxygen; Precious metals; Proton exchange membrane fuel cells (PEMFC); Protons; Rate constants; Synthesis (chemical); X ray photoelectron spectroscopy; Catalyst activity,"2,4,6-Tris(2-pyridyl)-1,3,5-triazine (TPTZ);Binary iron (Fe)/cobalt (Co)-nitrogen (N);Non-noble metal electrocatalyst;Oxygen reduction reaction (ORR);Proton exchange membrane (PEM) fuel cell;Noble metals;Pyridyl;Catalysis;Cobalt;Cyclic voltammetry;Electrocatalysts;Electrolytic reduction;Electron transitions;Ionic liquids;Metals;Oxygen;Precious metals;Proton exchange membrane fuel cells (PEMFC);Protons;Rate constants;Synthesis (chemical);X ray photoelectron spectroscopy;Catalyst activity","L. Zhang; Institute for Fuel Cell Innovation, National Research Council of Canada, 4250 Wesbrook Mall, Vancouver, BC V6T 1W5, Canada; email: lei.zhang@nrc.gc.ca",,,,,,,00134686,,ELCAA,,English,Electrochim Acta,Article,Scopus,,2-s2.0-77956475328,,Canada;China,nrc.gc.ca,,,"Li, S.; Zhang, L.; Kim, J.; Pan, M.; Shi, Z.; Zhang, J."
"Xu, L., Pan, G., Liang, X., Luo, G., Zou, C., Chen, G.",Synthesis of dual-doped non-precious metal electrocatalysts and their electrocatalytic activity for oxygen reduction reaction,2014,Journal of Energy Chemistry,23,4,,498,506,,7,10.1016/S2095-4956(14)60177-7,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84905859132&doi=10.1016%2FS2095-4956%2814%2960177-7&partnerID=40&md5=76b72cbe5a09a47a1b1800f1dee91e92,"State Key Laboratory of Tribology, Tsinghua University, Beijing, China; Tsinghua University, Beijing, China","Xu, Li, State Key Laboratory of Tribology, Tsinghua University, Beijing, China, Tsinghua University, Beijing, China; Pan, Guoshun, State Key Laboratory of Tribology, Tsinghua University, Beijing, China, Tsinghua University, Beijing, China; Liang, Xiaolu, State Key Laboratory of Tribology, Tsinghua University, Beijing, China, Tsinghua University, Beijing, China; Luo, Guihai, State Key Laboratory of Tribology, Tsinghua University, Beijing, China, Tsinghua University, Beijing, China; Zou, Chunli, State Key Laboratory of Tribology, Tsinghua University, Beijing, China, Tsinghua University, Beijing, China; Chen, Gaopan, State Key Laboratory of Tribology, Tsinghua University, Beijing, China, Tsinghua University, Beijing, China","The pyrolyzed carbon supported ferrum polypyrrole (Fe-N/C) catalysts are synthesized with or without selected dopants, p-toluenesulfonic acid (TsOH), by a facile thermal annealing approach at desired temperature for optimizing their activity for the oxygen reduction reaction (ORR) in O<inf>2</inf>-saturated 0.1 mol/L KOH solution. The electrochemical techniques such as cyclic voltammetry (CV) and rotating disk electrode (RDE) are employed with the Koutecky-Levich theory to quantitatively obtain the ORR kinetic constants and the reaction mechanisms. It is found that catalysts doped with TsOH show significantly improved ORR activity relative to the TsOH-free one. The average electron transfer numbers for the catalyzed ORR are determined to be 3.899 and 3.098, respectively, for the catalysts with and without TsOH-doping. The heat-treatment is found to be a necessary step for catalyst activity improvement, and the catalyst pyrolyzed at 600 °C gives the best ORR activity. An onset potential and the potential at the current density of - 1.5 mA/cm2 for TsOH-doped catalyst after pyrolysis are 30 mV and 170 mV, which are more positive than those without pyrolized. Furthermore, the catalyst doped with TsOH shows higher tolerance to methanol compared with commercial Pt/C catalyst in 0.1 mol/L KOH. To understand this TsOH doping and pyrolyzed effect, X-ray diffraction (XRD), scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS) are used to characterize these catalysts in terms of their structure and composition. XPS results indicate that the pyrrolic-N groups are the most active sites, a finding that is supported by the correspondence between changes in pyridinic-N content and ORR activity that occur with changing temperature. Sulfur species are also structurally bound to carbon in the forms of C-S<inf>n</inf>-C, an additional beneficial factor for the ORR. © 2014 Dalian Institute of Chemical Physics, the Chinese Academy of Sciences. Published by Elsevier B.V.",dual-dopant; heat-treatment; non-precious metal electrocatalyst; oxygen reduction reaction; polymer electrolyte membrane fuel cell,Carbon; Cyclic voltammetry; Doping (additives); Electrocatalysts; Electrolytic reduction; Polypyrroles; Precious metals; Proton exchange membrane fuel cells (PEMFC); Pyrolysis; Rate constants; Rotating disks; Scanning electron microscopy; X ray diffraction; X ray photoelectron spectroscopy; Changing temperature; dual-dopant; Electrocatalytic activity; Electrochemical techniques; Non-precious metals; Oxygen reduction reaction; Ptoluenesulfonic acid; Rotating disk electrodes; Catalyst activity,dual-dopant;heat-treatment;non-precious metal electrocatalyst;oxygen reduction reaction;polymer electrolyte membrane fuel cell;Carbon;Cyclic voltammetry;Doping (additives);Electrocatalysts;Electrolytic reduction;Polypyrroles;Precious metals;Proton exchange membrane fuel cells (PEMFC);Pyrolysis;Rate constants;Rotating disks;Scanning electron microscopy;X ray diffraction;X ray photoelectron spectroscopy;Changing temperature;Electrocatalytic activity;Electrochemical techniques;Non-precious metals;Ptoluenesulfonic acid;Rotating disk electrodes;Catalyst activity,"G. Pan; State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China; email: pangs@tsinghua.edu.cn",,,,,,Elsevier,20954956,,,,English,J. Energy Chem.,Article,Scopus,,2-s2.0-84905859132,,China,tsinghua.edu.cn,,,"Xu, L.; Pan, G.; Liang, X.; Luo, G.; Zou, C.; Chen, G."
"Lee, C., Uhm, Y.R., Choi-Yim, H., Park, J.H., Ha, T.",Synthesis of electro-catalysts Fe–N/C and core–shell structured Fe@SiO2 using e-beam irradiation,2023,Journal of the Korean Physical Society,83,4,,276,282,,4,10.1007/s40042-023-00880-0,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85165346764&doi=10.1007%2Fs40042-023-00880-0&partnerID=40&md5=40580dad1f63cec6bf230ffd842f2c4b,"Korea Atomic Energy Research Institute, Daejeon, South Korea; Department of Applied Physics, Sookmyung Women's University, Seoul, Seoul, South Korea; R&D Institute Gev, Eumseong-gun, South Korea","Lee, Chaewon, Korea Atomic Energy Research Institute, Daejeon, South Korea, Department of Applied Physics, Sookmyung Women's University, Seoul, Seoul, South Korea; Uhm, Young-rang, Korea Atomic Energy Research Institute, Daejeon, South Korea; Choi-Yim, Haein, Department of Applied Physics, Sookmyung Women's University, Seoul, Seoul, South Korea; Park, Ji-hyun, R&D Institute Gev, Eumseong-gun, South Korea; Ha, Taesung, R&D Institute Gev, Eumseong-gun, South Korea","In this work, the Fe–N/C catalyst and core–shell Fe@SiO<inf>2</inf> nanoparticle was synthesized using electron beam (e-beam) irradiation to improve the oxygen reduction reaction activity in the polymer electrolyte membrane fuel cells. The Fe–N<inf>x</inf> and Fe cores were synthesized at 80 kGy, and the SiO<inf>2</inf> shell was manufactured at 40 kGy using e-beam irradiation. The coordination between Fe and 1,10-phenanthroline was effectively controlled by the molecular structure of bidentate. The material properties of the Fe–N/C catalysts were investigated using transmission electron microscopy (TEM), Inductively coupled plasma mass spectroscopy (ICP-MS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The pyridinic N % was found to be 63.7% and 66.7% for Fe–N/C and 57Fe–N/C catalysts. Furthermore, the electrochemical properties of the Fe–N/C catalysts were investigated by Linear Sweep Voltammetry (LSV) and cyclic voltammetry (CV). The Fe–N/C catalyst showed higher activity at half-cells in 0.1 M HClO<inf>4</inf> solution than the Fe–N/C catalyst synthesized by ultrasonic irradiation. The shell formation of SiO<inf>2</inf>, which prevents Fe oxidation, was confirmed by EDS mapping in Fe@SiO<inf>2</inf>. © 2023, The Korean Physical Society.",E-beam irradiation synthesis; Fe–N–C catalyst; Non-precious metal catalyst; Oxygen reduction reaction,,E-beam irradiation synthesis;Fe–N–C catalyst;Non-precious metal catalyst;Oxygen reduction reaction,"Y.R. Uhm; HANARO Utilization Division, Korea Atomic Energy Research Institute (KAERI), Daejeon, 34057, South Korea; email: uyrang@kaeri.re.kr",,,,,,Korean Physical Society,03744884,,,,English,J. Korean Phys. Soc.,Article,Scopus,,2-s2.0-85165346764,,South Korea,kaeri.re.kr,,,"Lee, C.; Uhm, Y.R.; Choi-Yim, H.; Park, J.H.; Ha, T."
"Chen, C., Zhou, Z., Zhang, X., Sun, S.","Synthesis of Fe, N-doped Graphene/Carbon Black Composite with High Catalytic Activity for Oxygen Reduction Reaction; 铁、氮掺杂石墨烯/碳黑复合材料的制备及氧还原电催化性能",2016,Journal of Electrochemistry,22,1,,25,31,,6,10.13208/j.electrochem.150849,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85070981357&doi=10.13208%2Fj.electrochem.150849&partnerID=40&md5=c5043306b601a37d88768d6efb39cad3,"State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, China; Department of Chemistry, Xiamen University, Xiamen, Fujian, China","Chen, Chi, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, China, Department of Chemistry, Xiamen University, Xiamen, Fujian, China; Zhou, Zhiyou, Department of Chemistry, Xiamen University, Xiamen, Fujian, China; Zhang, Xinsheng, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, China; Sun, Shigang, Department of Chemistry, Xiamen University, Xiamen, Fujian, China","Oxygen reduction reaction (ORR) is a bottleneck for improving the efficiency of proton-exchange membrane fuel cells as a cathode reaction due to its sluggish kinetics. The exploitation of low cost and high performance non-precious metal catalysts such as Fe/N/C based materials toward ORR has attracted extensive attentions. In this work, the Fe, N-doped graphene nanosheets/carbon black composite was prepared by hydrothermal polymerization and followed by a twice-heat-treatment procedure using 2-aminoimidazole as an N precursor, FeCl<inf>3</inf>as an Fe precursor and KJ600 carbon black as a support. The TEM images revealed that the graphene nanosheets were separated by carbon black nanoparticles to form a robust composite architecture. This composite structure can provide high surface area and porous structure, facilitating the exposure of active sites and the mass transfer of O<inf>2</inf>. The XRD patterns proved the existence of graphene nanosheets formed during the first heat treatment. The obtained AIZ-Fe/N/C catalyst exhibited high ORR activity and low H<inf>2</inf>O<inf>2</inf>yield in an alkaline medium. Its methanol resistance was much better than that of commercial Pt/C catalyst. Furthermore, the ORR activity in an acid medium was also impressive. These results demonstrated that the AIZ-Fe/N/C catalyst is a promising candidate to replace Pt-based catalysts as a cathode catalyst in fuel cells. © 2016 The authors.",2-aminoimidazole; graphene nanosheets/carbon black composite; N-doped graphene; oxygen reduction reaction,,2-aminoimidazole;graphene nanosheets/carbon black composite;N-doped graphene;oxygen reduction reaction,"Z.-Y. Zhou; State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China; email: zhouzy@xmu.edu.cn",,,,,,Chinese Chemical Society,10063471,,,,Chinese,J. Electrochem.,Article,Scopus,,2-s2.0-85070981357,,China,xmu.edu.cn,,,"Chen, C.; Zhou, Z.; Zhang, X.; Sun, S."
"Ratso, S., Ranjbar-Sahraie, N., Sougrati, M.T., Kaarik, M., Kook, M., Saar, R., Paiste, P., Jia, Q., Leis, J., Mukerjee, S., Jaouen, F., Tammeveski, K.",Synthesis of highly-active Fe-N-C catalysts for PEMFC with carbide-derived carbons,2018,Journal of Materials Chemistry A,6,30,,14663,14674,,107,10.1039/c8ta02325e,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85050963929&doi=10.1039%2Fc8ta02325e&partnerID=40&md5=e39379ab2a3c65254919aa88921d7556,"Institute of Chemistry, Tartu Ülikool, Tartu, Tartumaa, Estonia; Interfaces and Materials for Energy, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Institute of Physics, Tartu Ülikool, Tartu, Tartumaa, Estonia; Ökoloogia ja Maateaduste Instituut, Tartu, Tartumaa, Estonia; Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA, United States","Ratso, Sander, Institute of Chemistry, Tartu Ülikool, Tartu, Tartumaa, Estonia; Ranjbar-Sahraie, Nastaran, Interfaces and Materials for Energy, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Sougrati, Moulay T., Interfaces and Materials for Energy, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Käärik, Maike, Institute of Chemistry, Tartu Ülikool, Tartu, Tartumaa, Estonia; Kook, Mati, Institute of Physics, Tartu Ülikool, Tartu, Tartumaa, Estonia; Saar, Rando, Institute of Physics, Tartu Ülikool, Tartu, Tartumaa, Estonia; Paiste, Päärn, Ökoloogia ja Maateaduste Instituut, Tartu, Tartumaa, Estonia; Jia, Qingying G., Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA, United States; Leis, Jaan, Institute of Chemistry, Tartu Ülikool, Tartu, Tartumaa, Estonia; Mukerjee, Sanjeev, Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA, United States; Jaouen, Frédéric, Interfaces and Materials for Energy, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Tammeveski, Kaido, Institute of Chemistry, Tartu Ülikool, Tartu, Tartumaa, Estonia","Proton exchange membrane fuel cells (PEMFC) offer a viable alternative to internal combustion engines, but highly performing stacks still require large amounts of platinum-based catalysts. Fe-N-C catalysts have recently emerged as potential substitutes. Carbide-derived carbon (CDC) can be designed to have various pore size distributions (PSD), in the microporous and/or mesoporous domains, which can be used for defining the number and/or accessibility of active sites in Fe-N-C catalysts based on the CDC. In this work, we compare two sets of Fe-N-C catalysts derived from two different CDCs, one with most frequent pore size of 8.5 Å, (CDC-2) and another one with most frequent pore sizes at 7.8 and 30 Å (CDC-1). The CDC-based Fe-N-C catalysts show excellent half-wave potential for oxygen reduction reaction (ORR) of 0.81 V vs. RHE in 0.5 M H<inf>2</inf>SO<inf>4</inf>. This work presents the first study of CDC-based catalysts in a PEMFC, where the performance of the CDC-2 based catalyst rivaled that of the best Fe-N-C materials in the literature. The catalyst derived from CDC-2 showed ca. 5 times higher activity at 0.8 V vs. RHE than the one derived from CDC-1. We show that the residual presence of boron in CDC-1 is the main reason for the lower activity of CDC-1 derived catalysts, leading to the formation of iron boride instead of ORR-active FeN<inf>x</inf>C<inf>y</inf> moieties. Higher Fe contents were investigated for CDC-2, but lead to unmodified activity, which is explained from Mössbauer spectroscopy measurements by the increasing formation of ORR-inactive Fe species at high Fe content. In summary, we demonstrate the excellent potential for CDC materials to be used in catalyst design and also identify some key issues that may arise from the possible residual presence of secondary atoms from the starting carbide. © The Royal Society of Chemistry.",,Carbides; Catalyst activity; Electrolytic reduction; Internal combustion engines; Iron; Pore size; Carbide derived carbon; Catalyst designs; Half-wave potential; Large amounts; Oxygen reduction reaction; Platinum based catalyst; Secondary atoms; Ssbauer spectroscopies; Proton exchange membrane fuel cells (PEMFC),Carbides;Catalyst activity;Electrolytic reduction;Internal combustion engines;Iron;Pore size;Carbide derived carbon;Catalyst designs;Half-wave potential;Large amounts;Oxygen reduction reaction;Platinum based catalyst;Secondary atoms;Ssbauer spectroscopies;Proton exchange membrane fuel cells (PEMFC),"F. Jaouen; Institut Charles Gerhardt Montpellier, Laboratory for Aggregates, Interfaces and Materials for Energy, UMR 5253, CNRS, Université de Montpellier, ENSCM, Montpellier, 34095, France; email: frederic.jaouen@univ-montp2.fr",,,,,,Royal Society of Chemistry,20507488,,JMCAE,,English,J. Mater. Chem. A,Article,Scopus,,2-s2.0-85050963929,,Estonia;France;United States,univ-montp2.fr,,,"Ratso, S.; Ranjbar-Sahraie, N.; Sougrati, M.T.; Kaarik, M.; Kook, M.; Saar, R.; Paiste, P.; Jia, Q.; Leis, J.; Mukerjee, S.; Jaouen, F.; Tammeveski, K."
"Rauf, M., Wang, J.W., Handschuh-Wang, S., Iqbal, W., Khan, M.A., Khan, S.A., Li, Y.L.",Synthesis of Mesoporous Fe/N/C Electrocatalyst for Improved Oxygen Reduction Reaction Activity Through CO2-Assisted Pyrolysis,2022,CHEMISTRYSELECT,7,31,e202202358,,,7,3,10.1002/slct.202202358,,"[Rauf, Muhammad; Handschuh-Wang, Stephan; Iqbal, Waheed; Li, Yongliang] Shenzhen Univ, Coll Chem & Environm Engn, Shenzhen 518060, Guangdong, Peoples R China; [Wang, Jingwen] Harbin Inst Technol Shenzhen, Environm Sci & Engn Res Ctr, Shenzhen 518060, Guangdong, Peoples R China; [Khan, Sayed Ali] Rutgers State Univ, Dept Chem & Chem Biol, Piscataway, NJ 08854 USA; [Khan, Muhammad Ali] Bahauddin Zakariya Univ, Inst Chem Sci, Multan 60800, Pakistan",,"Fe/Nx/C electrocatalysts have appeared as one of the promising non-platinum group metal (non-PGM) electrocatalysts for oxygen reduction reaction (ORR) in energy conversion devices. These non-PGM electrocatalysts Fe/N/C need structural tuning of pores to improve the surface area for high-performance ORR in proton exchange membrane fuel cells. In this report, the specific surface area of poly-melamine-formaldehyde (PMF)-based Fe/N/C electrocatalysts was enhanced without using a template through simple CO2-assisted pyrolysis. The highly porous electrocatalyst exhibited an onion-like graphitic structure and an efficient catalytic activity for ORR, comparable to Pt/C electrocatalyst. At 0.95 VRHE, the mass activity of the PMF-based PMF-Fe/N/C-CO2/Ar electrocatalyst was 63 % that of a commercial Pt/C electrocatalyst. Moreover, the devised fabrication process for the PMF-Fe/N/C electrocatalysts with a high specific surface area can be readily scaled up.",CO2 treatment; Fuel cells; Fe; Nx; C electrocatalysts; Mesoporous materials; Oxygen reduction reaction,DOPED POROUS CARBON; EFFICIENT ELECTROCATALYST; ORR; NANOPARTICLES; FRAMEWORKS; ALKALINE; INSIGHT; SITES,CO2 treatment;Fuel cells;Fe;Nx;C electrocatalysts;Mesoporous materials;Oxygen reduction reaction;DOPED POROUS CARBON;EFFICIENT ELECTROCATALYST;ORR;NANOPARTICLES;FRAMEWORKS;ALKALINE;INSIGHT;SITES,m.rauf@szu.edu.cn; liyli@szu.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,2365-6549,,,,English,CHEMISTRYSELECT,Article,WoS,Chemistry,WOS:000841998600022,2-s2.0-85136478405,China;United States;Pakistan,szu.edu.cn,Shenzhen Univ;Harbin Inst Technol Shenzhen;Rutgers State Univ;Bahauddin Zakariya Univ,"Shenzhen Univ, China;Harbin Inst Technol Shenzhen, China;Rutgers State Univ, United States;Bahauddin Zakariya Univ, Pakistan","Rauf, Muhammad; Wang, Jingwen; Handschuh-Wang, Stephan; Iqbal, Waheed; Khan, Muhammad Ali; Khan, Sayed Ali; Li, Yongliang"
"Wang, W., Yang, D.","Synthesis of Mn and N Co-Doped High ORR Performance Catalyst; Mn, N共掺杂高活性ORR催化剂的合成",2021,Tianjin Daxue Xuebao (Ziran Kexue yu Gongcheng Jishu Ban)/Journal of Tianjin University Science and Technology,54,11,,1121,1129,,1,10.11784/tdxbz202006072,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85111932194&doi=10.11784%2Ftdxbz202006072&partnerID=40&md5=4b0c9899d7d52a5407322f8461e2ac73,"Tianjin University, Tianjin, China","Wang, Wei, Tianjin University, Tianjin, China; Yang, Dongzi, Tianjin University, Tianjin, China","The oxygen reduction reaction(ORR)is an important reaction in life processes such as biological respiration and in energy conversion systems such as fuel cells. In proton-exchange membrane(PEM)fuel cells, including direct methanol fuel cells(DMFCs), ORR is the reaction that occurs at the cathode. Electrocatalysts are used in ORR, which are a specific form of catalysts that function at electrode surfaces or may be the electrode surface itself. Metal and nitrogen co-doped carbon materials catalysts(e.g., Metal-N-C, Metal=Fe, Mn, and Co)have good electrocatalytic activity for ORR and has become a research hotspot for using platinum-free catalysts for the cathode of fuel cells. Generally, the Fe-N-C catalyst has the highest ORR catalytic performance, but it promotes Fenton reaction(Fe2++H<inf>2</inf>O<inf>2</inf>, the by-product of two-electron ORR processes)resulting in structural damage of proton-exchange membrane fuel cells(PEMFC). Therefore, the Mn-N-C catalyst supported by monolayer graphene(Mn-N-C/G-30)was synthesized by metal-organic chemical vapor deposition process using manganese phthalocyanine as the precursor. Thermogravimetric analysis showed that through intermolecular bonding interaction occurring due to dehydrogenation at 480℃, MnPc molecules were eventually transformed into Mn-N-C/G-30 catalyst. The results of morphology characterizations by SEM, TEM, and XRD showed that the synthesized Mn-N-C/G-30 catalyst was a leaf-like nanomaterial with monocrystalline structures, which is completely different from the precursor manganese phthalocyanine and its lattice spacing of 0.315nm. The results of structure characterizations by Raman and XPS proved that novel Mn-N active sites, which are different from the Mn-N4 coordination of MnPc, were well-distributed in the Mn-N-C/G-30 catalyst. A three-electrode system was used for the electrochemical test. Linear sweep voltammetry results showed that under 25℃ and 0.1mol/L KOH, the onset potential and the current density at 0.88V of the Mn-N-C/G-30 catalyst were 0.97V and 1.4mA/cm2, respectively, better than that of MnPc(0.85V and 0.1mA/cm2)and commercial Pt/C(0.94V and 1.3mA/cm2). And all the mentioned above voltage is relative to hydrogen electrode. The calculation results of the K-L plot showed that ORR took place as a four-electron process on the surface of Mn-N-C/-G-30 catalyst. © 2021, Editorial Board of Journal of Tianjin University(Science and Technology). All right reserved.",Catalyst for oxygen reduction reaction; Manganese and nitrogen co-doping; Manganese phthalocyanine; Metal-organic chemical vapor deposi-tion,Catalyst activity; Cathodes; Chemical bonds; Direct methanol fuel cells (DMFC); Electrocatalysts; Electrochemical electrodes; Electrolytic reduction; Energy conversion; Gas fuel purification; Hydrogen peroxide; Iron compounds; Manganese compounds; Manganese metallography; Metallorganic chemical vapor deposition; Metals; Methanol fuels; Morphology; Organic chemicals; Organometallics; Oxidation; Oxygen reduction reaction; Potassium hydroxide; Thermogravimetric analysis; Direct methanol fuel cells (DMFCs); Electrocatalytic activity; Energy conversion systems; Inter-molecular bonding; Linear sweep voltammetry; Monocrystalline structures; Morphology characterizations; Structure characterization; Proton exchange membrane fuel cells (PEMFC),Catalyst for oxygen reduction reaction;Manganese and nitrogen co-doping;Manganese phthalocyanine;Metal-organic chemical vapor deposi-tion;Catalyst activity;Cathodes;Chemical bonds;Direct methanol fuel cells (DMFC);Electrocatalysts;Electrochemical electrodes;Electrolytic reduction;Energy conversion;Gas fuel purification;Hydrogen peroxide;Iron compounds;Manganese compounds;Manganese metallography;Metallorganic chemical vapor deposition;Metals;Methanol fuels;Morphology;Organic chemicals;Organometallics;Oxidation;Oxygen reduction reaction;Potassium hydroxide;Thermogravimetric analysis;Direct methanol fuel cells (DMFCs);Electrocatalytic activity;Energy conversion systems;Inter-molecular bonding;Linear sweep voltammetry;Monocrystalline structures;Morphology characterizations;Structure characterization;Proton exchange membrane fuel cells (PEMFC),"W. Wang; School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, China; email: wangweipaper@tju.edu.cn",,,,,,Tianjin University,04932137,,TCHHA,,English,Tianjin Daxue Xuebao (Ziran Kexue yu Gongcheng Jishu Ban),Article,Scopus,,2-s2.0-85111932194,,China,tju.edu.cn,,,"Wang, W.; Yang, D."
"Kang, H., Li, S., Liu, C., Guo, W., Pan, M.",Synthesis of Ordered Mesoporous Fe-N-C-PANI Catalyst via Self-assembly and Its Oxygen Reduction Reaction Activity in Acid Medium,2017,Gaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities,38,8,,1423,1430,,2,10.7503/cjcu20160941,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85028424242&doi=10.7503%2Fcjcu20160941&partnerID=40&md5=0c51346a4da299e10e5840d33f076765,"Wuhan University of Technology, Wuhan, Hubei, China","Kang, Huan, Wuhan University of Technology, Wuhan, Hubei, China; Li, Shang, Wuhan University of Technology, Wuhan, Hubei, China; Liu, Chang, Wuhan University of Technology, Wuhan, Hubei, China; Guo, Wei, Wuhan University of Technology, Wuhan, Hubei, China; Pan, Mu, Wuhan University of Technology, Wuhan, Hubei, China","Highly ordered mesoporous Fe-N-C-PANI electrocatalysts were synthesized by ethanol evaporation induced self-assembly using triblock copolymer Pluronic F127 as template, phenol-formaldehyde resin as carbon precursor and polyaniline as the N precursor. XRD, TEM, BET, XPS and RDE techniques were used to characterize the composition, morphology and electrocatalytic activity of the catalysts. The results show that the catalyst pyrolyzed at 800℃ has distinctly ordered mesoporous structure and straightest channel, and its speci-fic surface area is as high as 1007 m2/g. The results of XPS show that the percentage of pyidinic N and Graphitic N of Fe-N-C-PANI-800 is 3.86%(molar fraction). In the process of heat treatment, Fe(III) was reduced to metallic Fe, and the introduction of N was facilitated, which made iron carbide turn into Fe-N<inf>x</inf> active sites, and enhanced the ORR catalytic performance of catalysts. But when the temperature rise to 900℃, the formation of metallic Fe decreases its ORR activity. In the acid medium, Fe-N-C-PANI-800 has an onset potential of 0.89 V(vs. RHE) and a half-wave potential of 0.81 V(vs. RHE). Ordered mesoporous catalyst had higher graphitization structure, which improved its stability. © 2017, Higher Education Press. All right reserved.",Non-noble metal electrocatalyst; Ordered mesoporous; Oxygen reduction reaction(ORR); Proton exchange membrane fuel cell,Carbides; Carbon; Catalysts; Electrocatalysts; Electrolytic reduction; Mesoporous materials; Phenolic resins; Polyaniline; Precious metals; Proton exchange membrane fuel cells (PEMFC); Self assembly; X ray photoelectron spectroscopy; Catalytic performance; Electrocatalytic activity; Evaporation induced self assemblies; Half-wave potential; Ordered mesoporous; Ordered mesoporous structures; Oxygen reduction reaction; Phenol formaldehyde resins; Catalyst activity,Non-noble metal electrocatalyst;Ordered mesoporous;Oxygen reduction reaction(ORR);Proton exchange membrane fuel cell;Carbides;Carbon;Catalysts;Electrocatalysts;Electrolytic reduction;Mesoporous materials;Phenolic resins;Polyaniline;Precious metals;Proton exchange membrane fuel cells (PEMFC);Self assembly;X ray photoelectron spectroscopy;Catalytic performance;Electrocatalytic activity;Evaporation induced self assemblies;Half-wave potential;Ordered mesoporous structures;Oxygen reduction reaction;Phenol formaldehyde resins;Catalyst activity,"S. Li; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Key Laboratory of Hubei Province for Fuel Cell, Wuhan University of Technology, Wuhan, 430070, China; email: lishang@whut.edu.cn",,,,,,Higher Education Press,02510790,,KTHPD,,Chinese,Gaodeng Xuexiao Huaxue Xuebao,Article,Scopus,,2-s2.0-85028424242,,China,whut.edu.cn,,,"Kang, H.; Li, S.; Liu, C.; Guo, W.; Pan, M."
"Li, M., Liu, F., Pei, S., Zhou, Z., Niu, K., Wu, J., Zhang, Y.",Synthesis of Platinum Nanocrystals Dispersed on Nitrogen-Doped Hierarchically Porous Carbon with Enhanced Oxygen Reduction Reaction Activity and Durability,2023,Nanomaterials,13,3,444,,,,7,10.3390/nano13030444,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85147830796&doi=10.3390%2Fnano13030444&partnerID=40&md5=64a0cf313ea5d5ecd478fb560ee0583d,"School of Chemistry and Chemical Engineering, Shanghai Key Lab of Electrical Insulation & Thermal Aging, Shanghai, China; School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, Shanghai, China; School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China","Li, Min, School of Chemistry and Chemical Engineering, Shanghai Key Lab of Electrical Insulation & Thermal Aging, Shanghai, China; Liu, Feng, School of Chemistry and Chemical Engineering, Shanghai Key Lab of Electrical Insulation & Thermal Aging, Shanghai, China; Pei, Supeng, School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, Shanghai, China; Zhou, Zongshang, School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, Shanghai, China; Niu, Kai, School of Chemistry and Chemical Engineering, Shanghai Key Lab of Electrical Insulation & Thermal Aging, Shanghai, China; Wu, Jianbo, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China; Zhang, Yongming, School of Chemistry and Chemical Engineering, Shanghai Key Lab of Electrical Insulation & Thermal Aging, Shanghai, China","Platinum-based catalysts are widely used for efficient catalysis of the acidic oxygen reduction reaction (ORR). However, the agglomeration and leaching of metallic Pt nanoparticles limit the catalytic activity and durability of the catalysts and restrict their large-scale commercialization. Therefore, this study aimed to achieve a uniform distribution and strong anchoring of Pt nanoparticles on a carbon support and improve the ORR activity and durability of proton-exchange membrane fuel cells. Herein, we report on the facile one-pot synthesis of a novel ORR catalyst using metal–nitrogen–carbon (M–N–C) bonding, which is formed in situ during the ion exchange and pyrolysis processes. An ion-exchange resin was used as the carbon source containing R-N+(CH<inf>3</inf>)<inf>3</inf> groups, which coordinate with PtCl<inf>6</inf>2− to form nanosized Pt clusters confined within the macroporous framework. After pyrolysis, strong M-N-C bonds were formed, thereby preventing the leaching and aggregation of Pt nanoparticles. The as-synthesized Pt supported on the N-doped hierarchically porous carbon catalyst (Pt/NHPC-800) showed high specific activity (0.3 mA cm−2) and mass activity (0.165 A mg<inf>Pt</inf>−1), which are approximately 2.7 and 1.5 times higher than those of commercial Pt/C, respectively. The electrochemical surface area of Pt/NHPC-800 remained unchanged (~1% loss) after an accelerated durability test of 10,000 cycles. The mass activity loss after ADT of Pt/NHPC-800 was 18%, which is considerably lower than that of commercial Pt/C (43%). Thus, a novel ORR catalyst with highly accessible and homogeneously dispersed Pt-N-C sites, high activity, and durability was successfully prepared via one-pot synthesis. This facile and scalable synthesis strategy for high-efficiency catalysts guides the further synthesis of commercially available ORR catalysts. © 2023 by the authors.",electrocatalyst; fuel cell; ion exchange; oxygen reduction reaction; Pt-N-C bonding,,electrocatalyst;fuel cell;ion exchange;oxygen reduction reaction;Pt-N-C bonding,"Y. Zhang; School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Center of Hydrogen Science, Shanghai Key Lab of Electrical Insulation Thermal Aging, Shanghai Jiao Tong University, Shanghai, 200240, China; email: ymzhang@sjtu.edu.cn",,,,,,MDPI,,,,,English,Nanomaterials,Article,Scopus,,2-s2.0-85147830796,,China,sjtu.edu.cn,,,"Li, M.; Liu, F.; Pei, S.; Zhou, Z.; Niu, K.; Wu, J.; Zhang, Y."
"Hu, Y., Zhao, X., Huang, Y.J., Li, Q.F., Bjerrum, N.J., Liu, C.P., Xing, W.",Synthesis of self-supported non-precious metal catalysts for oxygen reduction reaction with preserved nanostructures from the polyaniline nanofiber precursor,2013,JOURNAL OF POWER SOURCES,225,,,129,136,8,49,10.1016/j.jpowsour.2012.10.013,,"[Hu, Yang; Zhao, Xiao; Xing, Wei] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Peoples R China; [Hu, Yang; Zhao, Xiao] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China; [Huang, Yunjie; Li, Qingfeng; Bjerrum, Niels J.] Tech Univ Denmark, Dept Energy Convers & Storage, DK-2800 Lyngby, Denmark; [Liu, Changpeng] Chinese Acad Sci, Changchun Inst Appl Chem, Lab Adv Power Sources, Changchun 130022, Peoples R China",,"Non-precious metal catalysts (NPMCs) for the oxygen reduction reaction (ORR) are an active subject of recent research on proton exchange membrane fuel cells. In this study, we report a new approach to preparation of self-supported and nano-structured NPMCs using pre-prepared polyaniline (PANI) nanofibers as both nitrogen and carbon precursors. The synthesized NPMCs possess nanoworm structures preserved from the PANI precursor and exhibit high onset potential of 0.905 V vs. RHE and selective activity of nearly four-electron ORR pathways. A significant enhancement in the intrinsic activity and onset potential for the ORR is observed when the Fe content in the precursor is increased from 0 to 3.0 wt.%, while further addition to 10.0 wt.% results in a decrease in the catalytic activity. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.",Oxygen reduction reaction; Non-precious metal catalyst; Heat-treatment; Activity; Active site,WALLED CARBON NANOTUBES; ELECTROLYTE FUEL-CELLS; COMPOSITE CATALYSTS; AUTOGENIC PRESSURE; ACTIVE-SITES; IRON; ELECTROCATALYSTS; CATHODE; ELECTROREDUCTION; CONDUCTIVITY,Oxygen reduction reaction;Non-precious metal catalyst;Heat-treatment;Activity;Active site;WALLED CARBON NANOTUBES;ELECTROLYTE FUEL-CELLS;COMPOSITE CATALYSTS;AUTOGENIC PRESSURE;ACTIVE-SITES;IRON;ELECTROCATALYSTS;CATHODE;ELECTROREDUCTION;CONDUCTIVITY,liuchp@ciac.jl.cn; xingwei@ciac.jl.cn,,"PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS",,,,ELSEVIER SCIENCE BV,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:000313923400020,2-s2.0-84868320658,China;Denmark,ciac.jl.cn,Chinese Acad Sci;Tech Univ Denmark,"Chinese Acad Sci, China;Tech Univ Denmark, Denmark","Hu, Yang; Zhao, Xiao; Huang, Yunjie; Li, Qingfeng; Bjerrum, Niels J.; Liu, Changpeng; Xing, Wei"
"Zhang, S.H., Yao, Y.Y., Li, Z., Zou, J.X.",Synthesis of ZIF-8 derived high-efficiency Fe-N-C catalyst and its oxygen reduction reaction performance,2025,CAILIAO GONGCHENG-JOURNAL OF MATERIALS ENGINEERING,53,3,,135,142,8,0,10.11868/j.issn.1001-4381.2023.000207,,"[Zhang, Saihang; Yao, Yingying; Li, Zhao; Zou, Jianxin] Shanghai Jiao Tong Univ, Light Alloy Net Forming Natl Engn Res Ctr LAF NERC, Shanghai 200240, Peoples R China; [Zhang, Saihang; Yao, Yingying; Li, Zhao; Zou, Jianxin] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China; [Zhang, Saihang; Yao, Yingying; Li, Zhao; Zou, Jianxin] Shanghai Jiao Tong Univ, Ctr Hydrogen Sci, Shanghai 200240, Peoples R China",,"To promote the large-scale commercial application of fuel cells, efficient, stable, and low-cost oxygen reduction reaction (ORR) catalysts should be developed. In this study, a Fe-doped ZIF-8 is used as the precursor, and the Fe-N-C non-precious metal catalyst is obtained by ball milling, calcination under a high-temperature argon atmosphere, pickling, and secondary calcination under an ammonia atmosphere. The results of various characterization methods show that Fe atoms are uniformly dispersed on the nitrogen- doped carbon framework, thus forming abundant Fe-Nx active sites. The electrochemical performance test results show that the Fe-N-C-5 degrees o catalyst with optimized preparation process and metal contents exhibits excellent ORR activity in 0. 1 mol/L HClO4 acidic solution, with a half-wave potential of 0.845 V. Meantime, it has good stability, and the half-wave potential does not drop significantly after 20000 cycles. These results provide an effective strategy for the rational design of precious metal-free ORR catalysts in the future.",oxygen reduction reaction; non-precious metal catalyst; proton exchange membrane fuel cell; electrocatalysis; metal-organic framework,METAL; DESIGN,oxygen reduction reaction;non-precious metal catalyst;proton exchange membrane fuel cell;electrocatalysis;metal-organic framework;METAL;DESIGN,,,"PO BOX 81 62, BEIJING, 100095, PEOPLES R CHINA",,,,BEIJING INST AERONAUTICAL MATERIALS-BIAM,1001-4381,,,,Chinese,CAILIAO GONGCHENG,Article,WoS,Materials Science,WOS:001457764400013,2-s2.0-105003121072,China,No email,Shanghai Jiao Tong Univ,"Shanghai Jiao Tong Univ, China","Zhang, Saihang; Yao, Yingying; Li, Zhao; Zou, Jianxin"
"Hamzehie, M.E., Samiee, L., Fattahi, M., Seifkordi, A.A., Shoghi, F., Maghsodi, A.",Synthesis-structure-performance correlation for poly-aniline-Me-C non-precious metal cathode based on mesoporous carbon catalysts for oxygen reduction reaction in low temperature fuel cells,2015,Renewable Energy,77,,,558,570,,16,10.1016/j.renene.2014.12.042,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84920913802&doi=10.1016%2Fj.renene.2014.12.042&partnerID=40&md5=c19d640ae9edea6d50846fa7886df64f,"Department of Chemical Engineering, Sharif University of Technology, Tehran, Tehran, Iran; Faculty of Petroleum Engineering, Petroleum University of Technology, Abadan, Khuzestan, Iran; Research Institute of Petroleum Industry, Tehran, Tehran, Tehran, Iran","Hamzehie, Mohammad Ehsan, Department of Chemical Engineering, Sharif University of Technology, Tehran, Tehran, Iran, Faculty of Petroleum Engineering, Petroleum University of Technology, Abadan, Khuzestan, Iran; Samiee, Leila, Research Institute of Petroleum Industry, Tehran, Tehran, Tehran, Iran; Fattahi, Maryam, Faculty of Petroleum Engineering, Petroleum University of Technology, Abadan, Khuzestan, Iran; Seifkordi, Ali Akbar, Department of Chemical Engineering, Sharif University of Technology, Tehran, Tehran, Iran; Shoghi, Fatemeh, Research Institute of Petroleum Industry, Tehran, Tehran, Tehran, Iran; Maghsodi, Akram, Research Institute of Petroleum Industry, Tehran, Tehran, Tehran, Iran","In this work, attempt is made to development of active non-precious metal catalysts (NPMCs) for the oxygen reduction reaction in polymer electrolyte fuel cells (PEFCs) based on the heat treatment of poly-aniline/transition metal/carbon precursors. All the materials have been characterized by X-ray diffraction (XRD) small and wide angle, N<inf>2</inf> adsorption-desorption isotherms, high-resolution transmission electron microscopy (TEM), Scanning electron microscope (SEM) and X-ray photo-electron spectroscopy (XPS). Moreover for electrochemical evaluation of samples, Rotating Disk electrode (RDE) technique and Fuel Cell test were employed. The results showed that onset potential for the optimized sample is about 0.1v less than the commercial catalyst whereas exchange current density of the optimized sample (at 0.2V vs. Reversible Hydrogen Electrode (RHE)) is about 15mAcm-2 more than platinum electro-catalyst. Finally, the polarization curves for the fabricated membrane electrode assembly (MEAs) with overall catalyst loading of 2mgcm-2 demonstrated that the optimized catalyst shows suitable performance compared with E-tek commercial platinum sample. © 2014 Elsevier Ltd.",Carbon mesoporous-150; Electro-catalyst; Non-platinum; Poly-aniline; Polymeric fuel cell,Aniline; Carbon; Catalysts; Curve fitting; Electrochemical electrodes; Electrodes; Electrolytic reduction; Electron spectroscopy; Fuel cells; High resolution transmission electron microscopy; Oxygen; Platinum; Polymers; Precious metals; Proton exchange membrane fuel cells (PEMFC); Reduction; Rotating disks; Scanning electron microscopy; Synthesis (chemical); Temperature; X ray diffraction; Adsorption desorption isotherms; Membrane electrode assemblies; Mesoporous; Non-platinum; Non-precious metal catalysts; Polymer electrolyte fuel cells; Polymeric fuel cells; Reversible hydrogen electrodes; Polyelectrolytes; catalyst; correlation; fuel cell; low temperature; metal; oxygen; performance assessment; scanning electron microscopy; X-ray diffraction; X-ray spectroscopy,Carbon mesoporous-150;Electro-catalyst;Non-platinum;Poly-aniline;Polymeric fuel cell;Aniline;Carbon;Catalysts;Curve fitting;Electrochemical electrodes;Electrodes;Electrolytic reduction;Electron spectroscopy;Fuel cells;High resolution transmission electron microscopy;Oxygen;Platinum;Polymers;Precious metals;Proton exchange membrane fuel cells (PEMFC);Reduction;Rotating disks;Scanning electron microscopy;Synthesis (chemical);Temperature;X ray diffraction;Adsorption desorption isotherms;Membrane electrode assemblies;Mesoporous;Non-precious metal catalysts;Polymer electrolyte fuel cells;Polymeric fuel cells;Reversible hydrogen electrodes;Polyelectrolytes;catalyst;correlation;fuel cell;low temperature;metal;performance assessment;X-ray diffraction;X-ray spectroscopy,,,,,,,Elsevier Ltd,09601481,9780123750259,,,English,Renew. Energy,Article,Scopus,,2-s2.0-84920913802,,Iran,No email,,,"Hamzehie, M.E.; Samiee, L.; Fattahi, M.; Seifkordi, A.A.; Shoghi, F.; Maghsodi, A."
"Zhu, Y.S., Zhang, B.S., Feng, Z.B., Su, D.S.",Synthesis-structure-performance correlation for poly(phenylenediamine)s/iron/carbon non-precious metal catalysts for oxygen reduction reaction,2016,CATALYSIS TODAY,260,,,112,118,7,16,10.1016/j.cattod.2015.05.018,,"[Zhu, Yansong; Zhang, Bingsen; Feng, Zhenbao; Su, Dang Sheng] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China; [Zhu, Yansong] Anshan Normal Univ, Sch Chem & Life Sci, Anshan 114005, Peoples R China",,"Non-precious metal catalysts as the electrocatalysts for oxygen reduction reaction (ORR) attract great attention due to their activity and stability close to Pt/C. Herein, the iron-based catalysts for ORR are synthesized through the heat treatment of o,m,p-phenylenediamine/iron/carbon precursors. Variation of polymerization, heat-treatment temperature, quantity and source of iron precursors during the synthesis of the catalyst leads to the difference in ORR activity. A relationship between the structure and performance is established through the systematic investigation of synthesis-structure-performance in these catalysts by using advanced characterization methods. It is confirmed that iron, nitrogen, and carbon play different roles in ORR activity, respectively. The formation and amount of Fe-N complex, which are often proposed to be active sites for ORR, are consistent with species and environment of nitrogen and iron. (C) 2015 Elsevier B.V. All rights reserved.",Electrocatalyst; Oxygen reduction; Non-precious metal; Synthesis-structure-performance,PEM FUEL-CELLS; CARBON-BLACK SUPPORTS; FE-BASED CATALYSTS; HIGH-AREA CARBON; ELECTROCHEMICAL REDUCTION; THERMAL-TREATMENT; CATHODE CATALYST; HEAT-TREATMENT; IRON; ELECTROCATALYSTS,Electrocatalyst;Oxygen reduction;Non-precious metal;Synthesis-structure-performance;PEM FUEL-CELLS;CARBON-BLACK SUPPORTS;FE-BASED CATALYSTS;HIGH-AREA CARBON;ELECTROCHEMICAL REDUCTION;THERMAL-TREATMENT;CATHODE CATALYST;HEAT-TREATMENT;IRON;ELECTROCATALYSTS,dssu@imr.ac.cn,,"PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS",,,,ELSEVIER SCIENCE BV,0920-5861,,,,English,CATAL TODAY,Article,WoS,Chemistry; Engineering,WOS:000364865800018,,China,imr.ac.cn,Chinese Acad Sci;Anshan Normal Univ,"Chinese Acad Sci, China;Anshan Normal Univ, China","Zhu, Yansong; Zhang, Bingsen; Feng, Zhenbao; Su, Dang Sheng"
"Alvarez-Manuel, L., Alegre, C., Sebastian, D., Napal, P.F., Lazaro Elorri, M.J.",Tailored Porous Carbon Xerogels for Fe-N-C Catalysts in Proton Exchange Membrane Fuel Cells,2024,Nanomaterials,14,1,14,,,,3,10.3390/nano14010014,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85181962916&doi=10.3390%2Fnano14010014&partnerID=40&md5=351a8cdd3a49b8db1991582f7080523d,"CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain","Álvarez-Manuel, Laura, CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Alegre, Cinthia, CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Sebastián, D., CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Napal, Pedro Francisco, CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain; Lázaro Elorri, María Jesús, CSIC - Instituto de Carboquimica (ICB), Zaragoza, Zaragoza, Spain","Atomically dispersed Fe-N-C catalysts for the oxygen reduction reaction (ORR) have been synthesized with a template-free method using carbon xerogels (CXG) as a porous matrix. The porosity of the CXGs is easily tunable through slight variations in the synthesis procedure. In this work, CXGs are prepared by formaldehyde and resorcinol polymerization, modifying the pH during the process. Materials with a broad range of porous structures are obtained: from non-porous to micro-/meso-/macroporous materials. The porous properties of CXG have a direct effect on Fe-N-CXG activity against ORR in an acidic medium (0.5 M H<inf>2</inf>SO<inf>4</inf>). Macropores and wide mesopores are vital to favor the mass transport of reagents to the active sites available in the micropores, while narrower mesopores can generate additional tortuosity. The role of microporosity is investigated by comparing two Fe-N-C catalysts using the same CXG as the matrix but following a different Fe and N doping procedure. In one case, the carbonization of CXG occurs rapidly and simultaneously with Fe and N doping, whereas in the other case it proceeds slowly, under controlled conditions and before the doping process, resulting in the formation of more micropores and active sites and achieving higher activity in a three-electrode cell and a better durability during fuel cell measurements. This work proves the feasibility of the template-free method using CXG as a carbon matrix for Fe-N-C catalysts, with the novelty of the controlled porous properties of the carbon material and its effect on the catalytic activity of the Fe-N-C catalyst. Moreover, the results obtained highlight the importance of the carbon matrix’s porous structure in influencing the activity of Fe-N-C catalysts against ORR. © 2023 by the authors.",carbon xerogels; Fe-N-C catalysts; fuel cells; oxygen reduction reaction,,carbon xerogels;Fe-N-C catalysts;fuel cells;oxygen reduction reaction,"C. Alegre; Instituto de Carboquímica, Consejo Superior de Investigaciones Científicas, Zaragoza, 50018, Spain; email: cinthia@icb.csic.es; M.J. Lázaro; Instituto de Carboquímica, Consejo Superior de Investigaciones Científicas, Zaragoza, 50018, Spain; email: mlazaro@icb.csic.es",,,,,,Multidisciplinary Digital Publishing Institute (MDPI),,,,,English,Nanomaterials,Article,Scopus,,2-s2.0-85181962916,,Spain,icb.csic.es,,,"Alvarez-Manuel, L.; Alegre, C.; Sebastian, D.; Napal, P.F.; Lazaro Elorri, M.J."
"Fu, X.G., Li, N., Ren, B.H., Jiang, G.P., Liu, Y.R., Hassan, F.M., Su, D., Zhu, J.B., Yang, L., Bai, Z.Y., Cano, Z.P., Yu, A.P., Chen, Z.W.",Tailoring FeN4 Sites with Edge Enrichment for Boosted Oxygen Reduction Performance in Proton Exchange Membrane Fuel Cell,2019,ADVANCED ENERGY MATERIALS,9,11,1803737,,,7,223,10.1002/aenm.201803737,,"[Fu, Xiaogang; Yang, Lin; Bai, Zhengyu] Henan Normal Univ, Sch Chem & Chem Engn, Collaborat Innovat Ctr Henan Prov Fine Chem Green, Key Lab Green Chem Media & React,Minist Educ, Xinxiang 453007, Peoples R China; [Fu, Xiaogang; Ren, Bohua; Jiang, Gaopeng; Liu, Yanru; Hassan, Fathy M.; Zhu, Jianbing; Cano, Zachary P.; Yu, Aiping; Chen, Zhongwei] Univ Waterloo, Dept Chem Engn, Waterloo Inst Nanotechnol, 200 Univ Ave W, Waterloo, ON N2L 3G1, Canada; [Li, Na; Su, Dong] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA",,"Transition metal atoms with corresponding nitrogen coordination are widely proposed as catalytic centers for the oxygen reduction reaction (ORR) in metal-nitrogen-carbon (M-N-C) catalysts. Here, an effective strategy that can tailor Fe-N-C catalysts to simultaneously enrich the number of active sites while boosting their intrinsic activity and utilization is reported. This is achieved by edge engineering of FeN4 sites via a simple ammonium chloride salt-assisted approach, where a high fraction of FeN4 sites are preferentially generated and hosted in a graphene-like porous scaffold. Theoretical calculations reveal that the FeN4 moieties with adjacent pore defects are likely to be more active than the nondefective configuration. Coupled with the facilitated accessibility of active sites, this prepared catalyst, when applied in a practical H-2-air proton exchange membrane fuel cell, delivers a remarkable peak power density of 0.43 W cm(-2), ranking it as one of the most active M-N-C catalysts reported to date. This work provides a new avenue for boosting ORR activity by edge manipulation of FeN4 sites.",edge engineering; FeN4 sites; fuel cells; M-N-C catalysts; oxygen reduction reaction,FE/N/C-CATALYSTS; DOPED GRAPHENE; ACTIVE-SITES; METAL ELECTROCATALYSTS; CATHODE CATALYSTS; IRON; CARBON; POLYANILINE; ALLOY; ORR,edge engineering;FeN4 sites;fuel cells;M-N-C catalysts;oxygen reduction reaction;FE/N/C-CATALYSTS;DOPED GRAPHENE;ACTIVE-SITES;METAL ELECTROCATALYSTS;CATHODE CATALYSTS;IRON;CARBON;POLYANILINE;ALLOY;ORR,dsu@bnl.gov; baizhengyu2000@163.com; zhwchen@uwaterloo.ca,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1614-6832,,,,English,ADV ENERGY MATER,Article,WoS,Chemistry; Energy & Fuels; Materials Science; Physics,WOS:000461840500011,2-s2.0-85060688727,China;Canada;United States,bnl.gov,Henan Normal Univ;Univ Waterloo;Brookhaven Natl Lab,"Henan Normal Univ, China;Univ Waterloo, Canada;Brookhaven Natl Lab, United States","Fu, Xiaogang; Li, Na; Ren, Bohua; Jiang, Gaopeng; Liu, Yanru; Hassan, Fathy M.; Su, Dong; Zhu, Jianbing; Yang, Lin; Bai, Zhengyu; Cano, Zachary P.; Yu, Aiping; Chen, Zhongwei"
"da Silva Freitas, W., D'Epifanio, A., Lo Vecchio, C., Gatto, I., Baglio, V., Ficca, V.C.A., Placidi, E., Mecheri, B.",Tailoring MOF structure via iron decoration to enhance ORR in alkaline polymer electrolyte membrane fuel cells,2023,Chemical Engineering Journal,465,,142987,,,,46,10.1016/j.cej.2023.142987,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85153291121&doi=10.1016%2Fj.cej.2023.142987&partnerID=40&md5=3ff56e8b9e53020f60758354c8ac58e2,"Department of Chemical Science and Technologies, Università degli Studi di Roma ""Tor Vergata"", Rome, RM, Italy; Istituto Di Tecnologie Avanzate Per L'energia, Messina, Messina, ME, Italy; Department of Physics, Sapienza Università di Roma, Rome, RM, Italy","da Silva Freitas, Williane, Department of Chemical Science and Technologies, Università degli Studi di Roma ""Tor Vergata"", Rome, RM, Italy; D'Epifanio, Alessandra, Department of Chemical Science and Technologies, Università degli Studi di Roma ""Tor Vergata"", Rome, RM, Italy; Lo Vecchio, Carmelo, Istituto Di Tecnologie Avanzate Per L'energia, Messina, Messina, ME, Italy; Gatto, Irene, Istituto Di Tecnologie Avanzate Per L'energia, Messina, Messina, ME, Italy; Baglio, Vincenzo, Istituto Di Tecnologie Avanzate Per L'energia, Messina, Messina, ME, Italy; Ficca, Valerio C.A., Department of Physics, Sapienza Università di Roma, Rome, RM, Italy; Placidi, Ernesto, Department of Physics, Sapienza Università di Roma, Rome, RM, Italy; Mecheri, Barbara, Department of Chemical Science and Technologies, Università degli Studi di Roma ""Tor Vergata"", Rome, RM, Italy","Fe-N-C catalysts were synthesized by combining a Zn-based zeolitic imidazolate framework (ZIF-8) structure, adopted as a nitrogen-carbon template, with an iron salt and conductive carbon support followed by a thermal treatment. The effect of three different pyrolysis temperatures (700, 900, and 1000 °C) on Zn removal from ZIF-8 was investigated to enhance the formation of Fe-based moieties in the N<inf>x</inf>-C groups during carbonization. Electrochemical characterization using a rotating ring disk electrode in an alkaline electrolyte demonstrated that ORR activity increased as the pyrolysis temperature increased. This trend can be ascribed to a more effective Zn removal and formation of high-active iron- and nitrogen-based catalytic sites, as pointed out by the Fe-N-C materials' chemical surface analysis after the pyrolysis step. The sample Fe-N-C-1000 demonstrated a remarkable ORR activity, even higher than Pt/C taken as reference. When subjected to accelerated stress tests, the Fe-N-C-1000 sample displayed higher performance durability over a long cycling duration (30,000 cycles) compared to Pt/C taken as control. Tests in the AEMFC fed with H<inf>2</inf> showed that the performance of the Fe-N-C-1000 catalyst was competitive (OCV = 0.98 vs. 1.05 V, 149 vs. 148 mW cm−2) compared to the state-of-the-art Pt/C electrode, using a FUMASEP® FAA-3-50 membrane. The material found an application also in alkaline direct methanol fuel cell (ADMFC) fed with methanol solutions at high concentrations (up to 10 M) due to a high methanol tolerance, as pointed out by rotating disk electrode experiments. © 2023 Elsevier B.V.",Alkaline polymer electrolyte membrane fuel cell; Fe-Nx-C active sites; Metal-organic frameworks; Oxygen reduction; Platinum-group-metal-free electrocatalysts,Alkalinity; Carbon; Carbonization; Copolymerization; Direct methanol fuel cells (DMFC); Durability; Electrocatalysts; Electrochemical electrodes; Electrolytic reduction; Iron compounds; Methanol; Methanol fuels; Nitrogen; Organometallics; Oxygen; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Rotating disks; Solid electrolytes; Surface analysis; Zinc; Zinc compounds; Active site; Alkaline polymer electrolyte membrane; Alkaline polymer electrolyte membrane fuel cell; Fe-Nx-C active site; Metal-free electrocatalysts; Metalorganic frameworks (MOFs); Oxygen Reduction; Platinum group metals; Platinum-group-metal-free electrocatalyst; ]+ catalyst; Iron,Alkaline polymer electrolyte membrane fuel cell;Fe-Nx-C active sites;Metal-organic frameworks;Oxygen reduction;Platinum-group-metal-free electrocatalysts;Alkalinity;Carbon;Carbonization;Copolymerization;Direct methanol fuel cells (DMFC);Durability;Electrocatalysts;Electrochemical electrodes;Electrolytic reduction;Iron compounds;Methanol;Methanol fuels;Nitrogen;Organometallics;Oxygen;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Rotating disks;Solid electrolytes;Surface analysis;Zinc;Zinc compounds;Active site;Alkaline polymer electrolyte membrane;Fe-Nx-C active site;Metal-free electrocatalysts;Metalorganic frameworks (MOFs);Platinum group metals;Platinum-group-metal-free electrocatalyst;]+ catalyst;Iron,"A. D'Epifanio; Department of Chemical Science and Technologies, University of Rome Tor Vergata, Rome, Via della Ricerca Scientifica, 00133, Italy; email: alessandra.d.epifanio@uniroma2.it",,,,,,Elsevier B.V.,13858947,,CMEJA,,English,Chem. Eng. J.,Article,Scopus,,2-s2.0-85153291121,,Italy,uniroma2.it,,,"da Silva Freitas, W.; D'Epifanio, A.; Lo Vecchio, C.; Gatto, I.; Baglio, V.; Ficca, V.C.A.; Placidi, E.; Mecheri, B."
"Li, L., Wen, Y., Han, G., Liu, Y., Song, Y., Zhang, W., Sun, J., Du, L., Kong, F., Ma, Y., Gao, Y., Wang, J., Du, C., Yin, G.",Tailoring the stability of Fe-N-C via pyridinic nitrogen for acid oxygen reduction reaction,2022,Chemical Engineering Journal,437,,135320,,,,108,10.1016/j.cej.2022.135320,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85125456939&doi=10.1016%2Fj.cej.2022.135320&partnerID=40&md5=16989f41922c4f8a4b55b4aca9bee5a7,"School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China","Li, Lingfeng, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Wen, Yandi, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Han, Guokang, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Liu, Yuxin, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Song, Yajie, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Zhang, Wei, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Sun, Jia, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Du, Lei, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Kong, Fanpeng, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Ma, Yulin, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Gao, Yunzhi, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Wang, Jiajun, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Du, Chunyu, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China; Yin, Geping, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China","Developing advanced non-precious metal catalysts towards acidic oxygen reduction reaction (ORR) is critical for electrochemical energy conversion devices. Fe-N-C catalysts are demonstrated to be the most promising alternatives to platinum-based catalysts for ORR. Herein, Fe single atoms (SAs) coordinated by pyridinic nitrogen catalysts (denoted as Fe-pyridinic N-C) are synthesized through pyrolysis of ZIF-8 encapsulating ferrocene. Owing to the synergistic effects between Fe SAs and pyridinic N, Fe-pyridinic N-C exhibits remarkable ORR activity and outstanding stability in acid media, evidenced by golden kinetic current density of 9.71 mA cm−2 at 0.8 V, along with only 21 mV decrease in half-wave potential after 20,000 cycles. Theoretical calculations demonstrate that pyridine-type N possesses stronger binding energy with Fe SAs compared with pyrrole-type N, in other words, high pyridinic N content will help stabilize the catalyst. This study will be of great significance for the development of non-noble metal catalysts towards ORR with enhanced stability in acidic media. © 2022 Elsevier B.V.",Durability; Fe-N-C; Metal-organic frameworks; Oxygen reduction reaction; PEMFC,Binding energy; Catalysts; Electrolytic reduction; Energy conversion; Iron; Iron compounds; Nitrogen; Organometallics; Precious metals; Electrochemical energy conversions; Fe-N-C; Metalorganic frameworks (MOFs); Non-precious metal catalysts; Oxygen reduction reaction; P.E.M.F.C; Pyridinic; Pyridinic nitrogen; Single-atoms; ]+ catalyst; Oxygen,Durability;Fe-N-C;Metal-organic frameworks;Oxygen reduction reaction;PEMFC;Binding energy;Catalysts;Electrolytic reduction;Energy conversion;Iron;Iron compounds;Nitrogen;Organometallics;Precious metals;Electrochemical energy conversions;Metalorganic frameworks (MOFs);Non-precious metal catalysts;P.E.M.F.C;Pyridinic;Pyridinic nitrogen;Single-atoms;]+ catalyst;Oxygen,"F. Kong; MIIT Key Laboratory of Critical Materials, Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China; email: fpkong@hit.edu.cn",,,,,,Elsevier B.V.,13858947,,CMEJA,,English,Chem. Eng. J.,Article,Scopus,,2-s2.0-85125456939,,China,hit.edu.cn,,,"Li, L.; Wen, Y.; Han, G.; Liu, Y.; Song, Y.; Zhang, W.; Sun, J.; Du, L.; Kong, F.; Ma, Y.; Gao, Y.; Wang, J.; Du, C.; Yin, G."
"Xie, H., Xie, X., Hu, G., Prabhakaran, V., Saha, S., Gonzalez-Lopez, L., Phakatkar, A.H., Hong, M., Wu, M., Shahbazian-Yassar, R., Ramani, V., Al-Sheikhly, M.I., Jiang, D.E., Shao, Y., Hu, L.",Ta–TiO x nanoparticles as radical scavengers to improve the durability of Fe–N–C oxygen reduction catalysts,2022,Nature Energy,7,3,,281,289,,212,10.1038/s41560-022-00988-w,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85127276845&doi=10.1038%2Fs41560-022-00988-w&partnerID=40&md5=350e91fa7acb785cdd92c56053435450,"A. James Clark School of Engineering, College Park, MD, United States; Pacific Northwest National Laboratory, Richland, WA, United States; Department of Chemistry and Biochemistry, The City University of New York, New York, NY, United States; McKelvey School of Engineering, St. Louis, MO, United States; College of Engineering, Chicago, IL, United States; University of California, Riverside, Riverside, CA, United States","Xie, Hua, A. James Clark School of Engineering, College Park, MD, United States; Xie, Xiaohong, Pacific Northwest National Laboratory, Richland, WA, United States; Hu, Guoxiang, Department of Chemistry and Biochemistry, The City University of New York, New York, NY, United States; Prabhakaran, Venkateshkumar, Pacific Northwest National Laboratory, Richland, WA, United States; Saha, Sulay, McKelvey School of Engineering, St. Louis, MO, United States; González-López, Lorelis, A. James Clark School of Engineering, College Park, MD, United States; Phakatkar, Abhijit H., College of Engineering, Chicago, IL, United States; Hong, Min, A. James Clark School of Engineering, College Park, MD, United States; Wu, Meiling, A. James Clark School of Engineering, College Park, MD, United States; Shahbazian-Yassar, Reza, College of Engineering, Chicago, IL, United States; Ramani, Vijay K., McKelvey School of Engineering, St. Louis, MO, United States; Al-Sheikhly, Mohamad I., A. James Clark School of Engineering, College Park, MD, United States; Jiang, De'en, University of California, Riverside, Riverside, CA, United States; Shao, Yuyan, Pacific Northwest National Laboratory, Richland, WA, United States; Hu, Liangbing, A. James Clark School of Engineering, College Park, MD, United States","Highly active and durable platinum group metal-free catalysts for the oxygen reduction reaction, such as Fe–N–C materials, are needed to lower the cost of proton-exchange membrane fuel cells. However, their durability is impaired by the attack of oxidizing radicals such as ·OH and HO<inf>2</inf>· that form from incomplete reduction of O<inf>2</inf> via H<inf>2</inf>O<inf>2</inf>. Here we demonstrate that Ta–TiO<inf>x</inf> nanoparticle additives protect Fe–N–C catalysts from such degradation via radical scavenging. The 5 nm Ta–TiO<inf>x</inf> nanoparticles were uniformly synthesized on a Ketjenblack substrate using a high-temperature pulse technique, forming the rutile TaO<inf>2</inf> phase. We found that Ta–TiO<inf>x</inf> nanoparticles suppressed the H<inf>2</inf>O<inf>2</inf> yield by 51% at 0.7 V in an aqueous rotating ring disk electrode test. After an accelerated durability test, a fuel cell prepared with the scavengers showed a current density decay of 3% at 0.9 V<inf>iR-free</inf> (internal resistance-compensated voltage); a fuel cell without scavengers showed 33% decay. Thus, addition of Ta–TiO<inf>x</inf> provides an active defence strategy to improve the durability of oxygen reduction reaction catalysts. © 2022, The Author(s), under exclusive licence to Springer Nature Limited.",,Additives; Electrolytic reduction; Oxide minerals; Oxygen; Proton exchange membrane fuel cells (PEMFC); Synthesis (chemical); TiO2 nanoparticles; Titanium dioxide; % reductions; Metal-free catalysts; Oxidizing radicals; Oxygen reduction catalysts; Oxygen reduction reaction; Platinum group metals; Proton-exchange membranes fuel cells; Radical scavengers; TiO; ]+ catalyst; Durability; catalyst; durability; fuel cell; nanoparticle; oxygen; radical; reduction; scavenging (chemistry),Additives;Electrolytic reduction;Oxide minerals;Oxygen;Proton exchange membrane fuel cells (PEMFC);Synthesis (chemical);TiO2 nanoparticles;Titanium dioxide;% reductions;Metal-free catalysts;Oxidizing radicals;Oxygen reduction catalysts;Oxygen reduction reaction;Platinum group metals;Proton-exchange membranes fuel cells;Radical scavengers;TiO;]+ catalyst;Durability;catalyst;fuel cell;nanoparticle;radical;reduction;scavenging (chemistry),"L. Hu; Department of Materials Science and Engineering, University of Maryland, College Park, United States; email: binghu@umd.edu; Y. Shao; Pacific Northwest National Laboratory, Richland, United States; email: yuyan.shao@pnnl.gov; G. Hu; Department of Chemistry and Biochemistry, Queens College of the City University of New York, Queens, United States; email: guoxiang.hu@qc.cuny.edu; R. Shahbazian-Yassar; Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, United States; email: rsyassar@uic.edu",,,,,,Nature Research,,,,,English,Nat. Energy,Article,Scopus,,2-s2.0-85127276845,,United States,umd.edu,,,"Xie, H.; Xie, X.; Hu, G.; Prabhakaran, V.; Saha, S.; Gonzalez-Lopez, L.; Phakatkar, A.H.; Hong, M.; Wu, M.; Shahbazian-Yassar, R.; Ramani, V.; Al-Sheikhly, M.I.; Jiang, D.-E.; Shao, Y.; Hu, L."
"Zhan, Y.F., Zeng, H.B., Xie, F.Y., Zhang, H., Zhang, W.H., Jin, Y.S., Zhang, Y.L., Chen, J., Meng, H.",Templated growth of Fe/N/C catalyst on hierarchically porous carbon for oxygen reduction reaction in proton exchange membrane fuel cells,2019,JOURNAL OF POWER SOURCES,431,,,31,39,9,52,10.1016/j.jpowsour.2019.05.051,,"[Zhan, Yunfeng; Zhang, Yueli] Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Sch Mat Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China; [Zhan, Yunfeng; Xie, Fangyan; Zhang, Hao; Zhang, Weihong; Chen, Jian] Sun Yat Sen Univ, Instrumental Anal & Res Ctr, Guangzhou 510275, Guangdong, Peoples R China; [Zhan, Yunfeng; Zeng, Hongbin; Jin, Yanshuo; Meng, Hui] Jinan Univ, Guangzhou Key Lab Vacuum Coating Technol & New En, Guangdong Prov Engn Technol Res Ctr Vacuum Coatin, Siyuan Lab,Dept Phys,Guangdong Prov Key Lab Opt F, Guangzhou 510632, Guangdong, Peoples R China",,This work reports a rational design of non-precious metal catalyst for oxygen reduction reaction in acidic media to be used in polymer electrolyte membrane fuel cell. A strategy is designed to avoid the agglomeration of metal compound during the pyrolysis of precursor. MgO template is introduced into a 1-10-phenanthroline-iron (II) precursor to promote the evolution of Fe-Nx active sites while avoiding the formation of inactive species. The template also contributes to the formation of micro/mesoporous structure. The as-prepared catalyst shows good performance in half-cell test with half-wave potential of 0.80 V in acidic media. The catalyst reaches a current density of 0.76 A cm(-2) at 0.6 ViR-free along with encouraging durability in H-2-O-2 fuel cell test.,Fuel cell; Oxygen reduction reaction; Non-precious metal catalysts,METAL-CATALYSTS; ACTIVE-SITES; PERFORMANCE; IRON; ELECTROCATALYSTS; DURABILITY; NANOTUBES; ORR; SPECTROSCOPY; POLYANILINE,Fuel cell;Oxygen reduction reaction;Non-precious metal catalysts;METAL-CATALYSTS;ACTIVE-SITES;PERFORMANCE;IRON;ELECTROCATALYSTS;DURABILITY;NANOTUBES;ORR;SPECTROSCOPY;POLYANILINE,stszyl@mail.sysu.edu.cn; puscj@mail.sysu.edu.cn; tmh@jnu.edu.cn,,"PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS",,,,ELSEVIER SCIENCE BV,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:000474500700005,2-s2.0-85066156033,China,mail.sysu.edu.cn,Sun Yat Sen Univ;Jinan Univ,"Sun Yat Sen Univ, China;Jinan Univ, China","Zhan, Yunfeng; Zeng, Hongbin; Xie, Fangyan; Zhang, Hao; Zhang, Weihong; Jin, Yanshuo; Zhang, Yueli; Chen, Jian; Meng, Hui"
"Tan, S.Y., Ng, W.K., Loh, K.S., Inukai, J., Aun, Y., Ahmad Junaidi, N.H., Saidin, N.U., Wong, W.Y.",Template-free modulation of MOF-derived atomically dispersed Fe-N-C catalyst for enhanced oxygen reduction reaction and durability in acidic medium,2025,Surfaces and Interfaces,56,,105683,,,,2,10.1016/j.surfin.2024.105683,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85212948635&doi=10.1016%2Fj.surfin.2024.105683&partnerID=40&md5=2c8c7faa2c5edc77863a53ad1f92e9be,"Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia; Clean Energy Research Center, University of Yamanashi, Kofu, Yamanashi, Japan; Communication Technology, Universiti Tunku Abdul Rahman, Kajang, Selangor, Malaysia; Agensi Nuklear Malaysia, Bangi, Selangor, Malaysia","Tan, Sue Ying, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia; Ng, Wei Keat, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia; Loh, Kee Shyuan, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia; Inukai, Junji, Clean Energy Research Center, University of Yamanashi, Kofu, Yamanashi, Japan; Aun, Yichiet, Communication Technology, Universiti Tunku Abdul Rahman, Kajang, Selangor, Malaysia; Ahmad Junaidi, Norhamizah Hazirah, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia; Saidin, Nur Ubaidah, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia, Agensi Nuklear Malaysia, Bangi, Selangor, Malaysia; Wong, W. Y., Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia","This study reports the successful synthesis of a noble metal-free metal-organic framework-derived Fe-N-C catalyst with promising oxygen reduction reaction (ORR) activity and durability in acidic medium via a template-free approach. The modulation of imidazole and iron precursors' composition of Fe-ZIF-8 has led to the formation of a unique graphitic shell-like structure decorated on dodecahedron-shaped particles with uniform bimodal pores and ultralow Fe loading of 0.46 at.% atomically dispersed over the surface. This unique combination resulted in significantly enhanced ORR kinetics compared to other Fe-N-C catalysts. The catalyst demonstrated a high onset potential of 0.92 V vs RHE and the ability to retain 95% current density after 50,000 s chronoamperometry analysis with no significant half-wave potential loss over 5000 load cycles accelerated durability test. Furthermore, the ten-month-aged sample maintained its onset potential with minimal half-wave potential loss over 20,000 load cycles. This work revealed that the ORR kinetic is improved by tuning the iron content to an appropriate atomic composition, with similar nitrogen-bonding configurations on the Fe-N-C catalysts, proving that FeNx is the key active site through an experimental approach. This work underscores the importance of precursor optimization in developing high-performance Fe-N-C catalysts without the need for additional materials. © 2024 Elsevier B.V.",Atomically dispersed; Fe-ZIF-8; Metal-organic framework; Oxygen reduction activity; PEMFC,,Atomically dispersed;Fe-ZIF-8;Metal-organic framework;Oxygen reduction activity;PEMFC,"W.Y. Wong; Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, Selangor, 43600, Malaysia; email: waiyin.wong@ukm.edu.my",,,,,,Elsevier B.V.,24680230,,,,English,Surf. Interfaces,Article,Scopus,,2-s2.0-85212948635,,Malaysia;Japan,ukm.edu.my,,,"Tan, S.Y.; Ng, W.K.; Loh, K.S.; Inukai, J.; Aun, Y.; Ahmad Junaidi, N.H.; Saidin, N.U.; Wong, W.Y."
"Gong, C., Wang, Z., Chen, X., Chen, Y., Yu, L., Dong, L.",Template synthesis of Ag@Fe-N-doped carbon electrocatalyst for oxygen reduction reaction in alkaline media,2020,ECS Transactions,98,9,,617,622,,0,10.1149/09809.0617ecst,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85092629110&doi=10.1149%2F09809.0617ecst&partnerID=40&md5=de95edb75dd1c833c8dec0bb825d204f,"College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China; Department of Physics, Hamline University, Saint Paul, MN, United States","Gong, Chong, College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China; Wang, Zhihuan, College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China; Chen, Xing, College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China; Chen, Yingjie, College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China; Yu, Liyan, College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China; Dong, Lifeng, College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China, Department of Physics, Hamline University, Saint Paul, MN, United States","A simple template method is proposed for the synthesis of Ag nanoparticles embedded in Fe-N-C (Ag@FeNC) as excellent oxygen reduction reaction (ORR) catalyst. Firstly, Ag@Fe3O4 nanoparticles are synthesized and loaded onto graphene oxide to form the Ag@Fe3O4-GO template. The surface of the template is then enveloped by polypyrrole. After pyrolysis at 850 °C for 1 h, Ag@FeNC is synthesized and demonstrates excellent ORR catalytic activity in alkaline medium. Therefore, it provides a simple method for preparing metal@Fe-N-C hybrid catalysts. © The Electrochemical Society",,Catalyst activity; Doping (additives); Electrocatalysts; Electrolytic reduction; Graphene; Iron oxides; Magnetite; Nanoparticles; Oxygen; Polyelectrolytes; Polypyrroles; Proton exchange membrane fuel cells (PEMFC); Silver nanoparticles; Synthesis (chemical); Ag nanoparticle; Alkaline media; Alkaline medium; Electrocatalyst for oxygen reduction reactions; Fe3O4 nanoparticles; Hybrid catalysts; Template methods; Template synthesis; Oxygen reduction reaction,Catalyst activity;Doping (additives);Electrocatalysts;Electrolytic reduction;Graphene;Iron oxides;Magnetite;Nanoparticles;Oxygen;Polyelectrolytes;Polypyrroles;Proton exchange membrane fuel cells (PEMFC);Silver nanoparticles;Synthesis (chemical);Ag nanoparticle;Alkaline media;Alkaline medium;Electrocatalyst for oxygen reduction reactions;Fe3O4 nanoparticles;Hybrid catalysts;Template methods;Template synthesis;Oxygen reduction reaction,"Y. Chen; College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China; email: chenyingjie@qust.edu.cn","Swider-Lyons, K.; Uchida, H.; Pintauro, P.N.; Mustain, W.; Buechi, F.; Pivovar, B.S.; Rice, C.A.; Fenton, J.M.; Strasser, P.; Ayers, K.E.; Weber, A.Z.; Mantz, R.A.; Xu, H.; Mitsushima, S.; Kjeang, E.; Schmidt, T.J.; Lakshmanan, B.; Kusoglu, A.; Jia, H.; Jones, D.J.; Ha, D.H.; Kim, S.K.",,"Pacific Rim Meeting on Electrochemical and Solid State Science 2020, PRiME 200",Honolulu,2020-10-04 through 2020-10-09,IOP Publishing Ltd,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-85092629110,,China;United States,qust.edu.cn,,,"Gong, C.; Wang, Z.; Chen, X.; Chen, Y.; Yu, L.; Dong, L."
"Liu, C.Y., Li, E.Y.",Termination Effects of Pt/v-Tin+1CnT2 MXene Surfaces for Oxygen Reduction Reaction Catalysis,2019,ACS APPLIED MATERIALS & INTERFACES,11,1,,1638,1644,7,117,10.1021/acsami.8b17600,,"[Liu, Chi-You; Li, Elise Y.] Natl Taiwan Normal Univ, Dept Chem, 88,Sect 4,Tingchow Rd, Taipei 116, Taiwan",,"Ideal catalysts for the oxygen reduction reaction (ORR) have been searched and researched for decades with the goal to overcome the overpotential problem in proton exchange membrane fuel cells. A recent experimental study reports the application of Pt nanoparticles on the newly discovered 2D material, MXene, with high stability and good performance in ORR. In this work, we simulate the Tin+1CnTx and the Pt-decorated Pt/v-Tin+1CnTx (n = 1-3, T = O and/or F) surfaces by first-principles calculations. We focus on the termination effects of MXene, which may be an important factor to enhance the performance of ORR. The properties of different surfaces are clarified by exhaustive computational analyses on the geometries, charges, and their electronic structures. The free-energy diagrams as well as the volcano plots for ORR are also calculated. On the basis of our results, the F-terminated surfaces are predicted to show a better performance for ORR but with a lower stability than the 0 terminated counterparts, and the underlying mechanisms are investigated in detail. This study provides a better understanding of the electronic effect induced by the terminators and may inspire realizations of practical MXene systems for ORR catalysis.",MXene; termination effects; oxygen reduction reaction; single atom catalysis; DFT; VASP,INITIO MOLECULAR-DYNAMICS; TOTAL-ENERGY CALCULATIONS; SINGLE-ATOM CATALYST; DOPED CARBON; CO OXIDATION; TRANSITION; GRAPHENE; TI2CO2; ELECTROCATALYSTS; ACTIVATION,MXene;termination effects;oxygen reduction reaction;single atom catalysis;DFT;VASP;INITIO MOLECULAR-DYNAMICS;TOTAL-ENERGY CALCULATIONS;SINGLE-ATOM CATALYST;DOPED CARBON;CO OXIDATION;TRANSITION;GRAPHENE;TI2CO2;ELECTROCATALYSTS;ACTIVATION,eliseytli@ntnu.edu.tw,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1944-8244,,,30539632,English,ACS APPL MATER INTER,Article,WoS,Science & Technology - Other Topics; Materials Science,WOS:000455561200177,,Taiwan,ntnu.edu.tw,Natl Taiwan Normal Univ,"Natl Taiwan Normal Univ, Taiwan","Liu, Chi-You; Li, Elise Y."
"Choi, C.H., Lim, H.K., Chung, M.W., Chon, G., Ranjbar-Sahraie, N., Altin, A., Sougrati, M.T., Stievano, L., Oh, H.S., Park, E.S., Luo, F., Strasser, P., Drazic, G., Mayrhofer, K.J.J., Kim, H., Jaouen, F.",The Achilles' heel of iron-based catalysts during oxygen reduction in an acidic medium,2018,Energy and Environmental Science,11,11,,3176,3182,,413,10.1039/c8ee01855c,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85056769239&doi=10.1039%2Fc8ee01855c&partnerID=40&md5=43e73e89829d8e9d752194ae7202fb7c,"School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea; Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Interfaces et Matériaux Pour l'Energie, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Dusseldorf, Nordrhein-Westfalen, Germany; Department of Materials Science and Engineering, Seoul National University, Seoul, South Korea; Department of Chemistry, Technische Universität Berlin, Berlin, Germany; Department of Materials Chemistry, National Institute of Chemistry Ljubljana, Ljubljana, Slovenia; Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany","Choi, Chang Hyuck, School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea; Lim, Hyung-kyu, Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Chung, Min-wook, School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea; Chon, Gajeon, School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea; Ranjbar-Sahraie, Nastaran, Interfaces et Matériaux Pour l'Energie, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Altin, Abdulrahman, Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Dusseldorf, Nordrhein-Westfalen, Germany; Sougrati, Moulay T., Interfaces et Matériaux Pour l'Energie, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Stievano, Lorenzo, Interfaces et Matériaux Pour l'Energie, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France; Oh, Hyun Seok, Department of Materials Science and Engineering, Seoul National University, Seoul, South Korea; Park, Eun Soo, Department of Materials Science and Engineering, Seoul National University, Seoul, South Korea; Luo, Fang, Department of Chemistry, Technische Universität Berlin, Berlin, Germany; Strasser, Peter, Department of Chemistry, Technische Universität Berlin, Berlin, Germany; Dražic̈, Goran, Department of Materials Chemistry, National Institute of Chemistry Ljubljana, Ljubljana, Slovenia; Mayrhofer, Karl J.J., Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Dusseldorf, Nordrhein-Westfalen, Germany, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany, Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; Kim, Hyungjun, Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Jaouen, Frédéric, Interfaces et Matériaux Pour l'Energie, Institut Charles Gerhardt Montpellier, Montpellier, Occitanie, France","For catalysing dioxygen reduction, iron-nitrogen-carbon (Fe-N-C) materials are today the best candidates to replace platinum in proton-exchange membrane fuel cell (PEMFC) cathodes. Despite tremendous progress in their activity and site-structure understanding, improved durability is critically needed but challenged by insufficient understanding of their degradation mechanisms during operation. Here, we show that FeN<inf>x</inf>C<inf>y</inf> moieties in a representative Fe-N-C catalyst are structurally stable but electrochemically unstable when exposed in an acidic medium to H<inf>2</inf>O<inf>2</inf>, the main oxygen reduction reaction (ORR) byproduct. We reveal that exposure to H<inf>2</inf>O<inf>2</inf> leaves iron-based catalytic sites untouched but decreases their turnover frequency (TOF) via oxidation of the carbon surface, leading to weakened O<inf>2</inf>-binding on iron-based sites. Their TOF is recovered upon electrochemical reduction of the carbon surface, demonstrating the proposed deactivation mechanism. Our results reveal for the first time a hitherto unsuspected key deactivation mechanism during the ORR in an acidic medium. This study identifies the N-doped carbon surface as the Achilles' heel during ORR catalysis in PEMFCs. Observed in acidic but not in alkaline electrolytes, these insights suggest that durable Fe-N-C catalysts are within reach for PEMFCs if rational strategies minimizing the amount of H<inf>2</inf>O<inf>2</inf> or reactive oxygen species (ROS) produced during the ORR are developed. © The Royal Society of Chemistry 2018.",,Binding sites; Carbon; Catalysts; Catalytic oxidation; Degradation; Doping (additives); Electrolytic reduction; Iron; Iron compounds; Oxygen; Alkaline electrolytes; Deactivation mechanism; Degradation mechanism; Electrochemical reductions; Iron-based catalyst; Oxygen reduction reaction; Reactive oxygen species; Turnover frequency; Proton exchange membrane fuel cells (PEMFC); biodegradation; carbon; catalysis; catalyst; electrochemistry; fuel cell; iron; membrane; nitrogen; oxidation; reactive oxygen species; reduction,Binding sites;Carbon;Catalysts;Catalytic oxidation;Degradation;Doping (additives);Electrolytic reduction;Iron;Iron compounds;Oxygen;Alkaline electrolytes;Deactivation mechanism;Degradation mechanism;Electrochemical reductions;Iron-based catalyst;Oxygen reduction reaction;Reactive oxygen species;Turnover frequency;Proton exchange membrane fuel cells (PEMFC);biodegradation;catalysis;catalyst;electrochemistry;fuel cell;membrane;nitrogen;oxidation;reduction,,,,,,,Royal Society of Chemistry,17545692,,,,English,Energy Environ. Sci.,Article,Scopus,,2-s2.0-85056769239,,South Korea;France;Germany;Slovenia,No email,,,"Choi, C.H.; Lim, H.-K.; Chung, M.W.; Chon, G.; Ranjbar-Sahraie, N.; Altin, A.; Sougrati, M.T.; Stievano, L.; Oh, H.S.; Park, E.S.; Luo, F.; Strasser, P.; Drazic, G.; Mayrhofer, K.J.J.; Kim, H.; Jaouen, F."
"Peng, R.L., Zhao, Z.K., Sun, H.M., Yang, Y.P., Song, T.L., Yang, Y., Shao, J.K., Jin, H.B., Sun, H.T., Zhao, Z.P.",The Active Sites and Corresponding Stability Challenges of the M-N-C Catalysts for Proton Exchange Membrane Fuel Cell,2023,CHINESE JOURNAL OF CHEMISTRY,41,6,,710,724,15,21,10.1002/cjoc.202200661,,"[Peng, Ruolin; Sun, Hongmin; Yang, Yongping; Song, Tinglu; Jin, Haibo; Zhao, Zipeng] Beijing Inst Technol, Expt Ctr Adv Mat, Sch Mat Sci & Engn, Beijing Key Lab Construct Tailorable Adv Funct Mat, Beijing 100081, Peoples R China; [Zhao, Zhongkun; Sun, Hongtao] Penn State Univ, Harold & Inge Marcus Dept Ind & Mfg Engn, University Pk, PA 16802 USA; [Yang, Yao] Westlake Univ, Sch Engn, Hangzhou 310030, Zhejiang, Peoples R China; [Shao, Jiankun] Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China; [Sun, Hongtao] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA",,"Comprehensive SummaryProton exchange membrane fuel cells (PEMFCs) as promising alternatives to traditional internal combustion engines have attracted massive concerns to promote their wide application in society. However, the biggest challenge to the commercialization of PEMFCs remains the high cost due to the adoption of the platinum group metal (PGM) catalysts in the cathode. Thus, the development of PGM-free catalysts based on earth-abundant elements with a much lower cost is considered as the most favorable solution. Although the reported activity of the state-of-the-art PGM-free catalyst is comparable with that of a typical commercial Pt/C catalyst, the precise structure of active sites on the PGM-free catalysts is debatable. In addition, the stability of the highly active PGM-free catalysts still needs improvement. Herein, we reviewed the recent research about the nature of the active sites, the progress in stability improvement, and the degradation mechanisms of active sites on PGM-free catalysts.",Proton exchange membrane fuel cell; Electrocatalysis; Oxygen reduction reaction; M-N-C catalysts; Active sites; Stability; Degradation mechanisms,OXYGEN REDUCTION REACTION; CARBON COMPOSITE CATALYSTS; HEAT-TREATMENT AFFECT; IRON-BASED CATALYSTS; FE-BASED CATALYSTS; FE/N/C-CATALYSTS; O-2 REDUCTION; NONNOBLE ELECTROCATALYSTS; DEGRADATION MECHANISMS; CATHODE CATALYSTS,Proton exchange membrane fuel cell;Electrocatalysis;Oxygen reduction reaction;M-N-C catalysts;Active sites;Stability;Degradation mechanisms;CARBON COMPOSITE CATALYSTS;HEAT-TREATMENT AFFECT;IRON-BASED CATALYSTS;FE-BASED CATALYSTS;FE/N/C-CATALYSTS;O-2 REDUCTION;NONNOBLE ELECTROCATALYSTS;CATHODE CATALYSTS,hbjin@bit.edu.cn; hongtao.sun@psu.edu.cn; zipengzhao@bit.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1001-604X,,,,English,CHINESE J CHEM,Review,WoS,Chemistry,WOS:000928882500001,2-s2.0-85147367402,China;United States,bit.edu.cn,Beijing Inst Technol;Penn State Univ;Westlake Univ,"Beijing Inst Technol, China;Penn State Univ, United States;Westlake Univ, China","Peng, Ruolin; Zhao, Zhongkun; Sun, Hongmin; Yang, Yongping; Song, Tinglu; Yang, Yao; Shao, Jiankun; Jin, Haibo; Sun, Hongtao; Zhao, Zipeng"
"Dombrovskis, J.K., Palmqvist, A.E.C.",The Active Site Structure of Transition Metal Ion-Chelating Ordered Mesoporous Carbon Fuel Cell Catalysts,2016,FUEL CELLS,16,1,,23,31,9,11,10.1002/fuce.201500122,,"[Dombrovskis, J. K.; Palmqvist, A. E. C.] Chalmers Univ Technol, Dept Chem & Chem Engn, Appl Chem, SE-41296 Gothenburg, Sweden",,Transition metal ion-chelating ordered mesoporous carbons (TM-OMCs) were studied as polymer electrolyte membrane fuel cell cathode catalysts. The active site structure of the TM-OMCs was studied by X-ray absorption spectroscopy in combination with variations of a range of synthesis variables of the TM-OMCs. The variations were found to have significant influence on the catalyst structure both in the mesoscale and on the atomic local structure allowing for detailed conclusions on the nature of the active sites. The main active site was found to be FeNx chelates. An additional highly active site was found and proposed to be a FeNx-dioxygen site. It was further found that the catalytic activity could be increased threefold by acid washing and subsequent heat treatment of the as-synthesized TM-OMC materials.,Active Site Structure; Catalyst; Cathode; Electrocatalyst; Non-Precious Metal; Ordered Mesoporous Materials; Oxygen Reduction Reaction; PEM Fuel Cell,OXYGEN-REDUCTION; CATHODE CATALYSTS; FE/N/C-CATALYSTS; HEAT-TREATMENT; O-2 REDUCTION; IRON; ELECTROCATALYSTS; POLYANILINE; PORPHYRIN; DENSITY,Active Site Structure;Catalyst;Cathode;Electrocatalyst;Non-Precious Metal;Ordered Mesoporous Materials;Oxygen Reduction Reaction;PEM Fuel Cell;OXYGEN-REDUCTION;CATHODE CATALYSTS;FE/N/C-CATALYSTS;HEAT-TREATMENT;O-2 REDUCTION;IRON;ELECTROCATALYSTS;POLYANILINE;PORPHYRIN;DENSITY,harterj@chalmers.se; anders.palmqvist@chalmers.se,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1615-6846,,,,English,FUEL CELLS,Article,WoS,Electrochemistry; Energy & Fuels,WOS:000370741400003,,Sweden,chalmers.se,Chalmers Univ Technol,"Chalmers Univ Technol, Sweden","Dombrovskis, J. K.; Palmqvist, A. E. C."
"Xiao, B., Zhu, H., Liu, H., Jiang, X., Jiang, Q.",The Activity Improvement of the TM3(hexaiminotriphenylene)2 Monolayer for Oxygen Reduction Electrocatalysis: A Density Functional Theory Study,2018,Frontiers in Chemistry,6,,351,,,,13,10.3389/fchem.2018.00351,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85059907280&doi=10.3389%2Ffchem.2018.00351&partnerID=40&md5=1b3e41a28ba5e3f005df4c2ba6aef170,"School of Energy and Power Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China; School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China; School of Materials Science and Engineering, Key Laboratory of Automotive Materials, Ministry of Education, Changchun, Jilin, China","Xiao, Beibei, School of Energy and Power Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China; Zhu, Hui, School of Energy and Power Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China; Liu, Houyi, School of Energy and Power Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China; Jiang, Xiaobao, School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China; Jiang, Qing, School of Materials Science and Engineering, Key Laboratory of Automotive Materials, Ministry of Education, Changchun, Jilin, China","Polymer electrolyte membrane fuel cells (PEMFCs) are one of the most prominent clean energy technologies designed to achieve hydrogen utilization and solve problems such as low efficiency and high pollution associated with fossil fuel combustion. In order to bring about PEMFC commercialization, especially for automobile applications, developing high-activity and -selectivity catalysts for the oxygen reduction reaction (ORR) is of critical importance. Based on the density functional theory, the catalytic activity of the conductive, two-dimensional metal–organic frameworks TM<inf>3</inf>(HITP)<inf>2</inf> monolayer (where HITP = hexaiminotriphenylene; TM = Ni, Co, Fe, Pd, Rh, Ru, Pt, Ir, and Os) for ORR has been investigated systematically. Furthermore, the classical volcano curves of the ORR activity, as a function of the OH binding, are found where the Ni, Pd, and Pt located at the weak binding side suffer from the sluggish *OOH formation and prefer the inefficient 2e− mechanism, while for other elements belonging to the strong binding side, the reactions are hindered by the poison due to ORR intermediates. Based on the free energy profiles, the corresponding overpotentials μ<inf>ORR</inf> exhibit the inverted volcano curve as a function of the atomic number of the 3d/4d/5d TM active center in the same period. Based on the μ<inf>ORR</inf> data, ORR activity decreases in the order of Ir > Co ≈ Rh > Ni ≈ Pd > Pt ≈ Fe > Ru > Os. Herein, the Co, Rh, and Ir central atoms exhibit enhanced catalytic activity in combination with the desirable selectivity of the O<inf>2</inf> reduction to H<inf>2</inf>O. This systematic work may open new avenues for the development of high-performance non-PGM catalysts for practical applications of ORR. © Copyright © 2018 Xiao, Zhu, Liu, Jiang and Jiang.",2D materials; activity and selectivity; DFT calculation; oxygen reduction reaction; transition metal elements,,2D materials;activity and selectivity;DFT calculation;oxygen reduction reaction;transition metal elements,"B. Xiao; School of Energy and Power Engineering, Jiangsu University of Science and Technology, Zhenjiang, China; email: xiaobb11@mails.jlu.edu.cn; Q. Jiang; Key Laboratory of Automobile Materials, Ministry of Education, School of Materials Science and Engineering, Jilin University, Changchun, China; email: jiangq@jlu.edu.cn",,,,,,"Frontiers Media S.A. info@frontiersin.org c/o Michael Kenyon ch. de la Pecholettaz 6, Epalinges 1066",,,,,English,Front. Chem.,Article,Scopus,,2-s2.0-85059907280,,China,mails.jlu.edu.cn,,,"Xiao, B.; Zhu, H.; Liu, H.; Jiang, X.; Jiang, Q."
"Higgins, D.C., Zamani, P., Yu, A., Chen, Z.",The application of graphene and its composites in oxygen reduction electrocatalysis: A perspective and review of recent progress,2016,Energy and Environmental Science,9,2,,357,390,,502,10.1039/c5ee02474a,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84958040165&doi=10.1039%2Fc5ee02474a&partnerID=40&md5=7c91c21e13479b180f0718c6548819fd,"Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada","Higgins, Drew C., Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada; Zamani, Pouyan, Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada; Yu, Aiping, Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada; Chen, Zhongwei, Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada","The pressing necessity of a sustainable energy economy renders electrochemical energy conversion technologies, such as polymer electrolyte fuel cells or metal-air batteries, of paramount importance. The implementation of these technologies at scale still faces cost and operational durability challenges that stem from the conventionally used oxygen reduction reaction (ORR) electrocatalysts. While years of progress in ORR catalyst research has yielded some very attractive material designs, further advances are still required. Graphene entered the picture over 10 years ago, and scientists have only recently achieved a level of understanding regarding how its specific properties can be fine-tuned for electrocatalyst applications. This paper provides a critical review of the knowledge generated and progress realized over these past years for the development of graphene-based ORR catalysts. The first section discusses the application potential of graphene or modified graphene as platinum nanoparticle catalyst supports. The second section discusses the important role that graphene has played in the development of non-precious metal ORR catalysts, and more particularly its role in pyrolyzed transition metal-nitrogen-carbon complexes or as a support for inorganic nanoparticles. Finally the development of heteroatom doped graphene species is discussed, as this has been demonstrated as an excellent method to fine-tune the physicochemical properties and induce catalytic activity. Throughout this paper, clear differentiation is made between acidic and alkaline ORR catalysts, and some common misconceptions or improper testing practices used throughout the literature are revealed. Synthesis strategies and how they pertain to the resulting structure and electrochemical performance of graphene are discussed. In light of the large body of work done in this area, specific strategies are suggested for perpetuating the advancement of graphene-based ORR electrocatalysts. With concerted efforts it is one day likely that graphene-based catalysts will be a staple of electrochemical energy systems. © 2016 The Royal Society of Chemistry.",,Carbon; Catalyst activity; Catalysts; Electrocatalysis; Electrocatalysts; Electrolytes; Electrolytic reduction; Energy conversion; Fuel cells; Fuel economy; Graphene; Metal nanoparticles; Metal pressing; Nanoparticles; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Reduction; Secondary batteries; Transition metals; Electrochemical energy; Electrochemical energy conversions; Electrochemical performance; Inorganic nanoparticle; Oxygen reduction reaction; Physicochemical property; Platinum nano-particles; Polymer electrolyte fuel cells; Catalyst supports; carbon; catalysis; catalyst; electrochemical method; electrokinesis; electrolyte; fuel cell; nanoparticle; platinum; polymer; pyrolysis; reduction,Carbon;Catalyst activity;Catalysts;Electrocatalysis;Electrocatalysts;Electrolytes;Electrolytic reduction;Energy conversion;Fuel cells;Fuel economy;Graphene;Metal nanoparticles;Metal pressing;Nanoparticles;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Reduction;Secondary batteries;Transition metals;Electrochemical energy;Electrochemical energy conversions;Electrochemical performance;Inorganic nanoparticle;Oxygen reduction reaction;Physicochemical property;Platinum nano-particles;Polymer electrolyte fuel cells;Catalyst supports;catalysis;catalyst;electrochemical method;electrokinesis;electrolyte;fuel cell;nanoparticle;platinum;polymer;pyrolysis,"Z. Chen; Department of Chemical Engineering, University of Waterloo, Waterloo, 200 University Ave. W., N2L 3G1, Canada; email: zhwchen@uwaterloo.ca",,,,,,Royal Society of Chemistry,17545692,,,,English,Energy Environ. Sci.,Review,Scopus,,2-s2.0-84958040165,,Canada,uwaterloo.ca,,,"Higgins, D.C.; Zamani, P.; Yu, A.; Chen, Z."
"Li, Y., Wang, X., Wang, Y., Shi, Z., Yang, Y., Zhao, T., Jiang, Z., Liu, C., Xing, W., Ge, J.",The decisive role of adsorbed OH* in low-potential CO electro-oxidation on single-atom catalytic sites,2023,Carbon Energy,5,9,e310,,,,24,10.1002/cey2.310,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85149270086&doi=10.1002%2Fcey2.310&partnerID=40&md5=b1869e9b1d6683480f220c22f0014a68,"State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China; Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; University of Chinese Academy of Sciences, Beijing, China; Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China","Li, Yang, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Wang, Xian, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Wang, Ying, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Shi, Zhaoping, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Yang, Yuqi, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China, University of Chinese Academy of Sciences, Beijing, China; Zhao, Tuo, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Jiang, Zheng, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; Liu, Changpeng, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Xing, Wei, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Ge, Junjie, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China, Dalian Institute of Chemical Physics Chinese Academy of Sciences, Dalian, Liaoning, China","CO impurity-induced catalyst deactivation has long been one of the biggest challenges in proton-exchange membrane fuel cells, with the poisoning phenomenon mainly attributed to the overly strong adsorption on the catalytic site. Here, we present a mechanistic study that overturns this understanding by using Rh-based single-atom catalysis centers as model catalysts. We precisely modulated the chelation structure of the Rh catalyst by coordinating Rh with C or N atoms, and probed the reaction mechanism by surface-enhanced Raman spectroscopy. Direct spectroscopic evidence for intermediates indicates that the reactivity of adsorbed OH*, rather than the adsorption strength of CO*, dictates the CO electrocatalytic oxidation behavior. The RhN<inf>4</inf> sites, which adsorb the OH* intermediate more weakly than RhC<inf>4</inf> sites, showed prominent CO oxidation activity that not only far exceeded the traditional Pt/C but also the RhC<inf>4</inf> sites with similar CO adsorption strength. From this study, it is clear that a paradigm shift in future research should be considered to rationally design high-performance CO electro-oxidation reaction catalysts by sufficiently considering the water-related reaction intermediate during catalysis. © 2023 The Authors. Carbon Energy published by Wenzhou University and John Wiley & Sons Australia, Ltd.",adsorbed CO* and OH*; carbon-based Rh single-atom catalysts; CO electro-oxidation reaction; electron interaction; MNx moiety,Adsorption; Atoms; Catalyst deactivation; Catalyst poisoning; Catalytic oxidation; Electrocatalysis; Electrooxidation; Platinum compounds; Proton exchange membrane fuel cells (PEMFC); Raman spectroscopy; Reaction intermediates; Rhodium compounds; Surface reactions; Adsorbed CO; Adsorbed CO* and OH*; Carbon-based; Carbon-based rh single-atom catalyst; CO electro-oxidation reaction; Electro-oxidation reaction; Electron's interactions; MNx moiety; Single-atoms; ]+ catalyst; Carbon,adsorbed CO* and OH*;carbon-based Rh single-atom catalysts;CO electro-oxidation reaction;electron interaction;MNx moiety;Adsorption;Atoms;Catalyst deactivation;Catalyst poisoning;Catalytic oxidation;Electrocatalysis;Electrooxidation;Platinum compounds;Proton exchange membrane fuel cells (PEMFC);Raman spectroscopy;Reaction intermediates;Rhodium compounds;Surface reactions;Adsorbed CO;Carbon-based;Carbon-based rh single-atom catalyst;Electro-oxidation reaction;Electron's interactions;Single-atoms;]+ catalyst;Carbon,"W. Xing; State Key Laboratory of Electroanalytic Chemistry, Jilin Province Key Laboratory of Low Carbon Chemistry Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China; email: xingwei@ciac.ac.cn; J. Ge; State Key Laboratory of Electroanalytic Chemistry, Jilin Province Key Laboratory of Low Carbon Chemistry Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China; email: gejj@ciac.ac.cn",,,,,,John Wiley and Sons Inc,,,,,English,Carb. Energy.,Article,Scopus,,2-s2.0-85149270086,,China,ciac.ac.cn,,,"Li, Y.; Wang, X.; Wang, Y.; Shi, Z.; Yang, Y.; Zhao, T.; Jiang, Z.; Liu, C.; Xing, W.; Ge, J."
"Yang, X., Sun, W., Chen, J., Gao, Y., Zhang, R., Luo, Q., Lyu, T., Du, L.",The degradation of cathodic Fe/N/C catalyst in PEMFCs: The evolution of remanent active sites after demetallation,2024,Journal of Materials Science and Technology,173,,,100,106,,11,10.1016/j.jmst.2023.08.004,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85169055714&doi=10.1016%2Fj.jmst.2023.08.004&partnerID=40&md5=4cdb22f1433d98523994096bcb788088,"Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Jiangsu University, Zhenjiang, Jiangsu, China; School of Materials Science and Engineering, State Key Laboratory of Advanced Special Steel, Shanghai, China; School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong, China","Yang, Xiaohua, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Sun, Wentao, Jiangsu University, Zhenjiang, Jiangsu, China; Chen, Jiatang, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Gao, Yang, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada; Zhang, Rongxian, Jiangsu University, Zhenjiang, Jiangsu, China; Luo, Qun, School of Materials Science and Engineering, State Key Laboratory of Advanced Special Steel, Shanghai, China; Lyu, Tao, School of Materials Science and Engineering, State Key Laboratory of Advanced Special Steel, Shanghai, China; Du, Lei, Centre Énergie Matériaux Télécommunications, Varennes, QC, Canada, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong, China","The state-of-the-art Fe/N/C catalyst has presented comparable initial cathode performance to the benchmark Pt/C catalyst in proton exchange membrane fuel cells (PEMFCs). However, the major bottleneck is its significant activity decay in real-world PEMFC cells. The superposed “fast decay” and “slow decay” have been well documented to describe the degradation process of Fe/N/C catalysts during PEMFC operation. The fast decay has been well understood in close relation to the demetallation at the initial 15-h stability test. Nevertheless, it is still unclear how the remanent active sites evolve after demetallation. To this end, the catalyst performance and evolution of a typical Fe/N/C active site were herein investigated through postmortem characterizations of the membrane electrode assemblies (MEAs) after different operations. It is presented that 1 bar pressure and 80 °C temperature are the optimized conditions for Fe/N/C MEA. Particularly, the “fast decay” in the initial 15 h is immune to the various operating parameters, while the “slow decay” highly depends on the applied temperature and pressure. According to the X-ray absorption spectra (XAS) analysis and stability test of MEA, the gradual evolution of Fe-N coordination to Fe-O is found correlated with the “slow decay” and accounts for the catalyst decay after the demetallation process. © 2023",Decay mechanism; Fe/N/C; Metal oxidation; PEMFCs; Stability,Benchmarking; Catalyst activity; Decay (organic); Iron compounds; More electric aircraft; Proton exchange membrane fuel cells (PEMFC); X ray absorption; Active site; Decay mechanisms; Demetallation; Fe/N/C; Membrane electrode assemblies; Metal oxidation; Proton-exchange membranes fuel cells; Remanents; Stability tests; ]+ catalyst; Electrodes,Decay mechanism;Fe/N/C;Metal oxidation;PEMFCs;Stability;Benchmarking;Catalyst activity;Decay (organic);Iron compounds;More electric aircraft;Proton exchange membrane fuel cells (PEMFC);X ray absorption;Active site;Decay mechanisms;Demetallation;Membrane electrode assemblies;Proton-exchange membranes fuel cells;Remanents;Stability tests;]+ catalyst;Electrodes,"T. Lyu; State Key Laboratory of Advanced Special Steels & Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China; email: lvtao@shu.edu.cn",,,,,,Chinese Society of Metals,10050302,,JSCTE,,English,J. Mater. Sci. Technol.,Article,Scopus,,2-s2.0-85169055714,,Canada;China,shu.edu.cn,,,"Yang, X.; Sun, W.; Chen, J.; Gao, Y.; Zhang, R.; Luo, Q.; Lyu, T.; Du, L."
"Shen, S.Y., Ren, Z.W., Xiang, S.L., Chen, S.Q., Tan, Z.H., Li, H.Y., Zhang, J.L.",The Development of a Highly Durable Fe-N-C Electrocatalyst With Favorable Carbon Nanotube Structures for the Oxygen Reduction in PEMFCs,2022,JOURNAL OF ELECTROCHEMICAL ENERGY CONVERSION AND STORAGE,19,1,010905,,,7,6,10.1115/1.4050725,,"[Shen, Shuiyun; Zhang, Junliang] Shanghai Jiao Tong Univ, MOE Key Lab Power & Machinery Engn, Sch Mech Engn, Inst Fuel Cells, Shanghai 200240, Peoples R China; [Ren, Ziwen; Xiang, Silei; Chen, Shiqu; Tan, Zehao; Li, Huiyuan] Shanghai Jiao Tong Univ, Sch Mech Engn, Inst Fuel Cells, Shanghai 200240, Peoples R China",,"Proton exchange membrane fuel cell (PEMFC) is a crucial route for energy saving, emission reduction, and the development of new energy vehicles because of its high power density, high energy density, as well as the low operating temperature which corresponds to fast starting and power matching. However, the rare and expensive Pt resource greatly hinders the mass production of the fuel cell, and the development of highly active and durable non-precious metal catalysts toward the oxygen reduction reaction (ORR) in the cathode is considered to be the ultimate solution. In this article, a highly active and durable Fe-N-C catalyst was facilely derived from metal-organic framework (MOF) materials, and a favorable structure of carbon nanotubes (CNTs) was formed, which accounts for a desired good durability. The as-optimized catalyst has a half-wave potential of 0.84 V for the ORR, which is comparable to that of commercial Pt/C. More attractively, it has good stabilities both in rotating disk electrode (RDE) and single-cell tests, which provides a large practical application potential in the replacement of Pt catalyst as the ORR electrocatalyst in fuel cells.",fuel cells; metal organic framework; carbon nanotubes; non-precious metal; catalysts,FUEL-CELLS; CATALYSTS,fuel cells;metal organic framework;carbon nanotubes;non-precious metal;catalysts;FUEL-CELLS,shuiyun_shen@sjtu.edu.cn; rafaelr@sjtu.edu.cn; xiangsilei@sjtu.edu.cn; chenshiqu@sjtu.edu.cn; 457253125@sjtu.edu.cn; lhy_sjtu@sjtu.edu.cn; junliang.zhang@sjtu.edu.cn,,"TWO PARK AVE, NEW YORK, NY 10016-5990 USA",,,,ASME,2381-6872,,,,English,J ELECTROCHEM ENERGY,Article,WoS,Electrochemistry; Energy & Fuels,WOS:000731587800013,2-s2.0-85127401575,China,sjtu.edu.cn,Shanghai Jiao Tong Univ,"Shanghai Jiao Tong Univ, China","Shen, Shuiyun; Ren, Ziwen; Xiang, Silei; Chen, Shiqu; Tan, Zehao; Li, Huiyuan; Zhang, Junliang"
"Kumar, Y., Kibena-Poldsepp, E., Akula, S., Kozlova, J., Kikas, A., Aruvali, J., Kisand, V., Kukli, K., Tammeveski, K.",The effect of additional nitrogen source on iron phthalocyanine-based nanocarbon catalysts for oxygen reduction reaction in acidic media,2023,Electrochemistry Communications,157,,107623,,,,8,10.1016/j.elecom.2023.107623,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85178337738&doi=10.1016%2Fj.elecom.2023.107623&partnerID=40&md5=f3ef4e062de2f81dbb3fde5618321099,"Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Tartu Ülikooli Füüsika Instituut, Tartu, Tartumaa, Estonia; Institute of Ecology and Earth Science, Tartu Ülikool, Tartu, Tartumaa, Estonia","Kumar, Yogesh, Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Kibena-Põldsepp, Elo, Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Akula, Srinu, Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Kozlova, Jekaterina, Tartu Ülikooli Füüsika Instituut, Tartu, Tartumaa, Estonia; Kikas, Arvo, Tartu Ülikooli Füüsika Instituut, Tartu, Tartumaa, Estonia; Aruväli, Jaan, Institute of Ecology and Earth Science, Tartu Ülikool, Tartu, Tartumaa, Estonia; Kisand, Vambola, Tartu Ülikooli Füüsika Instituut, Tartu, Tartumaa, Estonia; Kukli, Kaupo, Tartu Ülikooli Füüsika Instituut, Tartu, Tartumaa, Estonia; Tammeveski, Kaido, Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia","The focus in the development of catalysts doped with transition metals aims to replace platinum group metal catalysts in fuel cells. However, these non-precious metal catalysts exhibit limited performance in acidic environment for the oxygen reduction reaction (ORR) due to issues such as metal agglomeration and the subsequent loss of active sites. Herein, we synthesised catalysts doped with iron and nitrogen on a composite material consisting of carbide-derived carbon (CDC) and graphene (G), employing an additional nitrogen source dicyandiamide (DCDA), denoted as FeN-CDC/G/DCDA. Our physico-chemical analysis unveiled that the inclusion of DCDA was effective in mitigating metal agglomeration during the synthesis process and increasing the presence of Fe-N<inf>x</inf> sites in the catalysts. Notably, the FeN-CDC/G/DCDA catalyst exhibited enhanced ORR activity in acid media with half-wave potential (E<inf>1/2</inf>) of 0.76 V, surpassing the performance of the FeN-CDC/G catalyst, which had an E<inf>1/2</inf> value of 0.70 V. Furthermore, the rotating ring-disk electrode results indicated a reduced formation of hydrogen peroxide when employing the FeN-CDC/G/DCDA catalyst. The findings from this study represent a significant step towards the development of efficient catalysts for fuel cells, underscoring the pivotal role of additional nitrogen doping and its positive impact on the ORR performance. © 2023 The Authors",Electrocatalysis; Iron phthalocyanine; M−N−C catalyst; Non-precious metal catalyst; Oxygen reduction reaction; Proton-exchange membrane fuel cell,Agglomeration; Catalyst activity; Electrocatalysis; Electrolytic reduction; Iron; Iron compounds; Nanocatalysts; Oxygen; Precious metals; Proton exchange membrane fuel cells (PEMFC); Wetlands; Carbide derived carbon; Dicyandiamide; Iron phthalocyanines; M−N−C catalyst; Nitrogen sources; Non-precious metal catalysts; Oxygen reduction reaction; Performance; Proton-exchange membranes fuel cells; ]+ catalyst; Carbides,Electrocatalysis;Iron phthalocyanine;M−N−C catalyst;Non-precious metal catalyst;Oxygen reduction reaction;Proton-exchange membrane fuel cell;Agglomeration;Catalyst activity;Electrolytic reduction;Iron;Iron compounds;Nanocatalysts;Oxygen;Precious metals;Proton exchange membrane fuel cells (PEMFC);Wetlands;Carbide derived carbon;Dicyandiamide;Iron phthalocyanines;Nitrogen sources;Non-precious metal catalysts;Performance;Proton-exchange membranes fuel cells;]+ catalyst;Carbides,"K. Tammeveski; Institute of Chemistry, University of Tartu, Tartu, Ravila 14a, 50411, Estonia; email: kaido.tammeveski@ut.ee",,,,,,Elsevier Inc.,13882481,,ECCMF,,English,Electrochem. Commun.,Article,Scopus,,2-s2.0-85178337738,,Estonia,ut.ee,,,"Kumar, Y.; Kibena-Poldsepp, E.; Akula, S.; Kozlova, J.; Kikas, A.; Aruvali, J.; Kisand, V.; Kukli, K.; Tammeveski, K."
"Reshetenko, T., Randolf, G., Oddgaard, M., Zulevi, B., Serov, A., Kulikovsky, A.",The Effect of Proton Conductivity of Fe-N-C-Based Cathode on PEM Fuel cell Performance,2020,JOURNAL OF THE ELECTROCHEMICAL SOCIETY,167,8,084501,,,7,15,10.1149/1945-7111/ab8825,,"[Reshetenko, Tatyana] Univ Hawaii, Hawaii Nat Energy Inst, Honolulu, HI 96822 USA; [Randolf, Gunter] GRandalytics, Honolulu, HI 96822 USA; [Oddgaard, Madaleine] IRD Fuel Cells LLC, Albuquerque, NM 87113 USA; [Zulevi, Barr; Serov, Alexey] Pajarito Powder LLC, Albuquerque, NM 87109 USA; [Kulikovsky, Andrei] Forschungszentrum Julich, Inst Energy & Climate Res, IEK 14 Electrochem Proc Engn, D-52425 Julich, Germany; [Kulikovsky, Andrei] Lomonosov Moscow State Univ, Res Comp Ctr, Moscow 119991, Russia",,"A model-based impedance spectroscopy is used to determine proton conductivity, oxygen transport parameter, double layer capacitance and oxygen reduction reaction (ORR) Tafel slope in the Fe-N-C cathode catalyst layer (CCL) of a PEM fuel cell. Experimental spectra of two cells differing by the membrane thickness only are processed using a physics-based model for PEMFC impedance. The spectra have been measured in the range of current densities from 25 to 800 mA cm(-2). The ORR Tafel slope of both the cells shows almost linear growth with the current density. In one of the cells, the CCL proton conductivity sigma(p) strongly decays at the current density of 100 mA cm(-2); this decay is accompanied by the step growth of the double layer capacitance. Other minor variations of proton conductivity and double layer capacitance with the cell current occur also in a counterphase; presumed origin of this effect is discussed. The oxygen diffusion coefficient in the cathode exhibits explosive growth with the cell current. We attribute this effect to formation of temperature and pressure gradients in the CCL due to strongly non-uniform distribution of ORR rate in the electrode. (C) 2020 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.",,POLYMER ELECTROLYTE MEMBRANE; IMPEDANCE SPECTROSCOPY CHARACTERIZATION; OXYGEN REDUCTION REACTION; GAS-DIFFUSION ELECTRODES; CATALYST LAYER; ELECTROCHEMICAL IMPEDANCE; MASS-TRANSPORT; PHYSICAL MODEL; AIR CATHODE; RESISTANCE,POLYMER ELECTROLYTE MEMBRANE;IMPEDANCE SPECTROSCOPY CHARACTERIZATION;OXYGEN REDUCTION REACTION;GAS-DIFFUSION ELECTRODES;CATALYST LAYER;ELECTROCHEMICAL IMPEDANCE;MASS-TRANSPORT;PHYSICAL MODEL;AIR CATHODE;RESISTANCE,A.Kulikovsky@fz-juelich.de,,"65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA",,,,ELECTROCHEMICAL SOC INC,0013-4651,,,,English,J ELECTROCHEM SOC,Article,WoS,Electrochemistry; Materials Science,WOS:000527234100001,2-s2.0-85084742037,United States;Germany;Russian Federation,fz-juelich.de,Univ Hawaii;GRandalytics;IRD Fuel Cells LLC;Pajarito Powder LLC;Forschungszentrum Julich;Lomonosov Moscow State Univ,"Univ Hawaii, United States;GRandalytics, United States;IRD Fuel Cells LLC, United States;Pajarito Powder LLC, United States;Forschungszentrum Julich, Germany;Lomonosov Moscow State Univ, Russian Federation","Reshetenko, Tatyana; Randolf, Gunter; Oddgaard, Madaleine; Zulevi, Barr; Serov, Alexey; Kulikovsky, Andrei"
"Zhu, H.J., Paddison, S.J., Zawodzinski, T.A ","The effects of the ligand, central metal, and solvent on the O2 binding of non-precious metal catalyst model systems: An ab initio study",2013,ELECTROCHIMICA ACTA,101,,,293,300,8,13,10.1016/j.electacta.2012.11.137,,"[Zhu, Hongjuan; Paddison, Stephen J.; Zawodzinski, Thomas A., Jr.] Univ Tennessee, Dept Chem & Biomol Engn, Knoxville, TN 37996 USA",,"Non-precious metal (NPM) catalysts are currently under development to replace the expensive platinum-based materials currently utilized for oxygen reduction in PEM fuel cells. In this work, systematic studies were carried out to examine the effect of central metal, chelating ligand, and solvent on the O-2 binding activity of a series of M-N-2 and M-N-4 NPM catalysts (Im)MLn where M=Cu2+, Fe2+, Fe3+, Ni2+ and Co2+, L= diaminotriazole or porphyrin, and a support ligand imidazole (Im). O-2 and H2O binding energies were calculated for all the catalysts. Cu2+-based catalysts exhibit no activity toward O-2 regardless of the ligand, Fe2+- and Co2+-based catalysts show the strongest O-2 binding, and the rest fall in between. This is in alignment with the energy gap between the metal 3d(z2) and the in-plane anti-bonding pi* orbital on the O-2 with the larger the energy gap, the weaker the interaction. Porphyrin-based catalysts bind weakly with H2O compared to their diaminotriazole counterparts, which is attributed to the larger energy gap between the HOMO of H2O and the higher lying LUMO of Porphyrin-based catalysts resulted from a stronger anti-bonding interaction between their metal d orbitals and the sigma(N) orbitals of porphyrin. We propose that the initial O-2 absorption activity of M-N-4 or M-N-2 catalysts in the oxygen reduction reaction be considered on the basis of the relative binding of O-2 to H2O. (C) 2012 Elsevier Ltd. All rights reserved.",Oxygen reduction reaction; Non-precious metal catalysts; Density functional theory; Binding energy,FE-BASED CATALYSTS; MOLECULAR-OXYGEN-REDUCTION; PEM FUEL-CELLS; CARBON-BLACK; HEAT-TREATMENT; ACTIVE-SITES; ELECTROCATALYSTS; DENSITY; IRON; PHTHALOCYANINES,Oxygen reduction reaction;Non-precious metal catalysts;Density functional theory;Binding energy;FE-BASED CATALYSTS;MOLECULAR-OXYGEN-REDUCTION;PEM FUEL-CELLS;CARBON-BLACK;HEAT-TREATMENT;ACTIVE-SITES;ELECTROCATALYSTS;DENSITY;IRON;PHTHALOCYANINES,spaddison@utk.edu,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:000321232000035,2-s2.0-84878555827,United States,utk.edu,Univ Tennessee,"Univ Tennessee, United States","Zhu, Hongjuan; Paddison, Stephen J.; Zawodzinski, Thomas A., Jr."
"Seeberger, D., Hauenstein, P., Hartert, A., Thiele, S.",The influence of the anion exchange membrane on mass-transport limiting phenomena in bipolar interface fuel cells with Fe-N/C based cathode catalyst layers,2021,RSC Advances,11,50,,31477,31486,,10,10.1039/d1ra05010a,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85119877557&doi=10.1039%2Fd1ra05010a&partnerID=40&md5=3192fc3668cefd07fe531e91b4ca2d4a,"Forschungszentrum Jülich GmbH, Julich, Germany; Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany","Seeberger, Dominik, Forschungszentrum Jülich GmbH, Julich, Germany, Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; Hauenstein, Pascal, Forschungszentrum Jülich GmbH, Julich, Germany, Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; Hartert, Adrian, Forschungszentrum Jülich GmbH, Julich, Germany, Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany; Thiele, Simon, Forschungszentrum Jülich GmbH, Julich, Germany, Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Bayern, Germany","Water management is a very important issue in low temperature fuel cells such as proton exchange membrane fuel cells (PEMFCs) or anion exchange membrane fuel cells. Within bipolar interface fuel cells, water management inhibits an even more critical role. The earlier work on bipolar interface fuel cells (BPIFCs), employing Fe-N/C on the cathode side for the oxygen reduction reaction (ORR) in an alkaline environment, demonstrated increased stability of the catalyst compared to the acidic environment of the conventional PEMFCs. However, for the BPIFCs, severe mass transport limitations (MTL) dramatically reduced the power output of the cell within a few hours. In the present work water transport processes are identified as the source of the observed MTL, after evaluating the performance data of BPIFCs, where the amount of directly deposited anion exchange membrane (AEM) material was varied. It can be seen that the BPIFCs with lower AEM content show an earlier onset of MTL than the cells prepared with higher AEM content. It is shown that the AEM can be used as a tool to regulate the influx rate of product water from the bipolar interface into the CCL and that flooding of the porous layers is identified as the main source of the observed MTL. This work paves the way for further development of BPIFCs using Fe-N/C at the cathode electrode, as novel cell design strategies can now focus exclusively on avoiding flooding phenomena. © 2021 The Royal Society of Chemistry.",,Alkaline fuel cells; Cathodes; Electrolytic reduction; Floods; Gas fuel purification; Ion exchange membranes; Ions; Linearization; Proton exchange membrane fuel cells (PEMFC); Temperature; Alkaline environment; Anion-exchange membrane fuel cells; Cathode catalyst layers; Floodings; Low temperature fuel cells; Management IS; Mass transport limitation; Oxygen reduction reaction; Proton-exchange membranes fuel cells; Waters managements; Catalysts,Alkaline fuel cells;Cathodes;Electrolytic reduction;Floods;Gas fuel purification;Ion exchange membranes;Ions;Linearization;Proton exchange membrane fuel cells (PEMFC);Temperature;Alkaline environment;Anion-exchange membrane fuel cells;Cathode catalyst layers;Floodings;Low temperature fuel cells;Management IS;Mass transport limitation;Oxygen reduction reaction;Proton-exchange membranes fuel cells;Waters managements;Catalysts,"S. Thiele; Forschungszentrum Jülich GmbH, Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Erlangen, Egerlandstr. 3, 91058, Germany; email: si.thiele@fz-juelich.de",,,,,,Royal Society of Chemistry,,,RSCAC,,English,RSC Adv.,Article,Scopus,,2-s2.0-85119877557,,Germany,fz-juelich.de,,,"Seeberger, D.; Hauenstein, P.; Hartert, A.; Thiele, S."
"Yuan, P.F., Li, C., Zhang, J.N., Wang, F., Wang, J.J., Chen, X.B.",The nearby atomic environment effect on an Fe-N-C catalyst for the oxygen reduction reaction: a density functional theory-based study,2024,PHYSICAL CHEMISTRY CHEMICAL PHYSICS,26,8,,6826,6833,8,3,10.1039/d3cp05156k,,"[Yuan, Pengfei; Chen, Xuebo] Shandong Lab Yantai Adv Mat & Green Mfg, Yantai 265503, Peoples R China; [Li, Chong; Wang, Fei] Zhengzhou Univ, Int Joint Res Lab Quantum Funct Mat Henan Prov, Zhengzhou 450001, Peoples R China; [Li, Chong; Wang, Fei] Zhengzhou Univ, Sch Phys & Microelect, Zhengzhou 450001, Peoples R China; [Zhang, Jiannan] Zhengzhou Univ, Coll Mat Sci & Engn, Zhengzhou 450001, Peoples R China; [Wang, Juanjuan; Chen, Xuebo] Beijing Normal Univ, Dept Chem, Xin Wai Da Jie 19, Beijing 100875, Peoples R China",,"Fe-N-C materials have emerged as highly promising non-noble metal catalysts for oxygen reduction reactions (ORRs) in polymer electrolyte membrane fuel cells. However, they still encounter several challenges that need to be addressed. One of these challenges is establishing an atomic environment near the Fe-N4 site, which can significantly affect catalyst activity. To investigate this, herein, we employed density functional theory (DFT). According to our computational analysis of the Gibbs free energy of the reaction based on the computational hydrogen electrode (CHE) model, we successfully determined two C-O-C structures near the Fe-N4 site (referred to as str-11) with the highest limiting potential (0.813 V). Specifically, in the case of O-doped structures, the neighboring eight carbon (C) atoms around nitrogen (N) can be categorized into two distinct types: four C atoms (type A) exhibiting high sensitivity to the limiting potential and the remaining four C atoms (type B) displaying inert behavior. Electronic structure analysis further elucidated that a structure will have strong activity if the valence band maximum (VBM) around its gamma point is mainly contributed by dxz, dyz or dz2 orbitals of Fe atoms. Constant-potential calculations showed that str-11 is suitable for the ORR under both acidic and alkaline conditions with a limiting potential of 0.695 V at pH = 1 and 0.926 V at pH = 14, respectively. Additionally, microkinetic simulations indicated the possibility of str-11 as the active site for the ORR under working potential at pH = 14. Fe-N-C materials have emerged as highly promising non-noble metal catalysts for oxygen reduction reactions (ORRs) in polymer electrolyte membrane fuel cells.",,TOTAL-ENERGY CALCULATIONS; WAVE; IRON,TOTAL-ENERGY CALCULATIONS;WAVE;IRON,pfyuan@amgm.ac.cn; xuebochen@bnu.edu.cn,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,1463-9076,,,38324383,English,PHYS CHEM CHEM PHYS,Article,WoS,Chemistry; Physics,WOS:001157793600001,2-s2.0-85184596323,China,amgm.ac.cn,Shandong Lab Yantai Adv Mat & Green Mfg;Zhengzhou Univ;Beijing Normal Univ,"Shandong Lab Yantai Adv Mat & Green Mfg, China;Zhengzhou Univ, China;Beijing Normal Univ, China","Yuan, Pengfei; Li, Chong; Zhang, Jiannan; Wang, Fei; Wang, Juanjuan; Chen, Xuebo"
"Seo, M.H., Higgins, D.C., Jiang, G., Choi, S.M., Han, B., Chen, Z.",Theoretical insight into highly durable iron phthalocyanine derived non-precious catalysts for oxygen reduction reactions,2014,Journal of Materials Chemistry A,2,46,,19707,19716,,57,10.1039/c4ta04690k,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84908609950&doi=10.1039%2Fc4ta04690k&partnerID=40&md5=52f4493f78861f33914c7e167ad67208,"Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo, ON, Canada; Surface Technology Division, Korea Institute of Materials Science, Changwon, Seongsan-gu, South Korea; Department of Energy Systems Engineering, Daegu Gyeongbuk Institute of Science and Technology, Daegu, South Korea","Seo, Min-ho, Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo, ON, Canada; Higgins, Drew C., Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo, ON, Canada; Jiang, Gaopeng, Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo, ON, Canada; Choi, Sung Mook, Surface Technology Division, Korea Institute of Materials Science, Changwon, Seongsan-gu, South Korea; Han, Byungchan, Department of Energy Systems Engineering, Daegu Gyeongbuk Institute of Science and Technology, Daegu, South Korea; Chen, Zhongwei, Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo, ON, Canada","N<inf>4</inf>-chelate macrocycles comprise the foundation for non-precious metal oxygen reduction reaction (ORR) catalyst research, where the main electrochemical process occurs in polymer electrolyte membrane (PEM) fuel cells. Although iron-nitrogen-carbon (M-N-C) complexes are known to be the most active non-precious ORR catalysts to date, a fundamental understanding of the ORR mechanisms of these materials is still in its nascent stage and needs further investigation. In this work, ab initio density functional theory (DFT) calculations have been applied to unveil the underlying principles for the electrocatalytic activity and structural stability of Fe-N<inf>4</inf> chelates exposed to acidic media. Therefore, we compared the electronic structures of ferrous phthalocyanine (Fe-Pc) and an in-house developed Fe-Pc modified with diphenylphenthioether substituent species (Fe-SPc). The results of these DFT simulations directly correlate with the results of the half-cell ORR activity and stability electrochemical testing in 0.1 M HClO<inf>4</inf>. The results indicate that the relative energetic position of the dz2-orbital with respect to the Fermi level can induce an Fe redox couple potential shift and modulate the catalytic activity towards the ORR. Furthermore, our combined DFT calculations and empirical observations highlight that the relative position of the dz2-orbital can be controlled by the incorporation of functional groups, resulting in the ability to tune the ORR activity of these complexes. Structural stability of the materials, as predicted by the DFT-calculated cohesive energies of Fe and FeO, can also be readily tuned by modulating Fe-Pc with the substituent species. This study, coupling rigorous experimental observations with DFT investigations, thereby provides a fundamental insight that can aid in the design of future generations of non-precious ORR catalysts with improved activity and stability. © 2014 the Partner Organisations.",,,,,,,,,,Royal Society of Chemistry,20507488,,JMCAE,,English,J. Mater. Chem. A,Article,Scopus,,2-s2.0-84908609950,,Canada;South Korea,No email,,,"Seo, M.H.; Higgins, D.C.; Jiang, G.; Choi, S.M.; Han, B.; Chen, Z."
"Zhang, Y., Li, B., Su, Y.",Theoretical Insights on ORR Activity of Sn-N-C Single-Atom Catalysts,2023,Molecules,28,14,5571,,,,10,10.3390/molecules28145571,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85166018776&doi=10.3390%2Fmolecules28145571&partnerID=40&md5=2fbfc7e4ea4265374086fa7536de1010,"School of Energy and Chemical Engineering, Xiamen University Malaysia, Sepang, Selangor, Malaysia; School of Chemistry, Xi'an Jiaotong University, Xi'an, Shaanxi, China","Zhang, Yuhui, School of Energy and Chemical Engineering, Xiamen University Malaysia, Sepang, Selangor, Malaysia; Li, Boyang, School of Chemistry, Xi'an Jiaotong University, Xi'an, Shaanxi, China; Su, Yaqiong, School of Chemistry, Xi'an Jiaotong University, Xi'an, Shaanxi, China","The advancement of efficient and stable single-atom catalysts (SACs) has become a pivotal pursuit in the field of proton exchange membrane fuel cells (PEMFCs) and metal-air batteries (MABs), aiming to enhance the utilization of clean and sustainable energy sources. The development of such SACs has been greatly significant in facilitating the oxygen reduction reaction (ORR) process, thereby contributing to the progress of these energy conversion technologies. However, while transition metal-based SACs have been extensively studied, there has been comparatively less exploration of SACs based on p-block main-group metals. In this study, we conducted an investigation into the potential of p-block main-group Sn-based SACs as a cost-effective and efficient alternative to platinum-based catalysts for the ORR. Our approach involved employing density functional theory (DFT) calculations to systematically examine the catalyst properties of Sn-based N-doped graphene SACs, the ORR mechanism, and their electrocatalytic performance. Notably, we employed an H atom-decorated N-based graphene matrix as a support to anchor single Sn atoms, creating a contrast catalyst to elucidate the differences in activity and properties compared to pristine Sn-based N-doped graphene SACs. Through our theoretical analysis, we gained a comprehensive understanding of the active structure of Sn-based N-doped graphene electrocatalysts, which provided a rational explanation for the observed high four-electron reactivity in the ORR process. Additionally, we analyzed the relationship between the estimated overpotential and the electronic structure properties, revealing that the single Sn atom was in a +2 oxidation state based on electronic analysis. Overall, this work represented a significant step towards the development of efficient and cost-effective SACs for ORR which could alleviate environmental crises, advance clean and sustainable energy sources, and contribute to a more sustainable future. © 2023 by the authors.",electrocatalysis; N-doped carbon; oxygen reduction reaction; single Sn atom,,electrocatalysis;N-doped carbon;oxygen reduction reaction;single Sn atom,"Y. Su; School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices of Ministry of Education, National Innovation Platform (Center) for Industry-Education Integration of Energy Storage Technology, Xi’an Jiaotong University, Xi’an, 710049, China; email: yqsu1989@xjtu.edu.cn",,,,,,Multidisciplinary Digital Publishing Institute (MDPI),14203049,,MOLEF,37513442,English,Molecules,Article,Scopus,,2-s2.0-85166018776,,Malaysia;China,xjtu.edu.cn,,,"Zhang, Y.; Li, B.; Su, Y."
"Zhang, J., Zhang, P., Yu, A.M., Li, D.S., Sun, C.H.",Theoretical screening of the metal-nonmetal pair anchored on N-doped graphene for the oxygen reduction reaction,2024,PHYSICAL CHEMISTRY CHEMICAL PHYSICS,26,43,,27332,27337,6,0,10.1039/d4cp03136a,,"[Zhang, Ji; Zhang, Peng] Tongling Univ, Sch Elect Engn, Tongling 244061, Peoples R China; [Yu, Aimin; Sun, Chenghua] Swinburne Univ Technol, Dept Chem & Biotechnol, Hawthorn, Vic 3122, Australia; [Li, Dong-sheng] China Three Gorges Univ, Coll Mat & Chem Engn, Key Lab Inorgan Nonmet Crystalline & Energy Conver, Yichang 443002, Peoples R China",,"The oxygen reduction reaction (ORR) is a crucial process during hydrogen-based energy conversion at the cathode of proton-exchange membrane fuel cells, which causes a bottleneck owing to the high price and low efficiency of ORR catalysts. Single-atom catalysts (SACs) have garnered significant attention from researchers due to their exceptional activity and efficient atom utilization. To identify highly active SACs among numerous candidates, a three-step screening strategy was adopted to select the best ORR catalyst. Through this screening approach, the SIr@N8 SAC composed of S and Ir pair anchored N-doped graphene was identified to exhibit an excellent catalytic performance with an overpotential of 0.29 V. Its remarkable activity and stability make it a promising ORR catalyst. And the electronic structure analysis suggested that the electronic structure of active metal sites could be regulated by nonmetal coordinates to enhance the catalytic performance. This theoretical study is expected to provide an effective scanning strategy for identifying ORR catalysts with an outstanding catalytic performance. The SIr@N8 catalyst composed of S and Ir pair anchored N-doped graphene was picked out by three-step screening strategy, which was identified to exhibit an excellent ORR catalytic performance.",,SINGLE-ATOM CATALYSTS; ELECTROCATALYSTS,SINGLE-ATOM CATALYSTS;ELECTROCATALYSTS,chenghuasun@swin.edu.au,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,1463-9076,,,39440526,English,PHYS CHEM CHEM PHYS,Article,WoS,Chemistry; Physics,WOS:001338567900001,2-s2.0-85207240766,China;Australia,swin.edu.au,Tongling Univ;Swinburne Univ Technol;China Three Gorges Univ,"Tongling Univ, China;Swinburne Univ Technol, Australia;China Three Gorges Univ, China","Zhang, Ji; Zhang, Peng; Yu, Aimin; Li, Dong-sheng; Sun, Chenghua"
"Chen, X., Xia, D., Shi, Z., Zhang, J.",Theoretical study of Oxygen reduction reaction catalysts: From Pt to non-precious metal catalysts,2013,Lecture Notes in Energy,9,,,339,373,,5,10.1007/978-1-4471-4911-8_11,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84882950496&doi=10.1007%2F978-1-4471-4911-8_11&partnerID=40&md5=0a47e62caaa09959e5092cd70f1786a7,"College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, China; College of Engineering, Peking University, Beijing, China; National Research Council Canada, Ottawa, ON, Canada; National Research Council Canada, Ottawa, ON, Canada","Chen, Xin, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, China; Xia, Ding-Guo, College of Engineering, Peking University, Beijing, China; Shi, Zheng, National Research Council Canada, Ottawa, ON, Canada; Zhang, Jiujun, National Research Council Canada, Ottawa, ON, Canada","Fuel cells are regarded as one of the most promising candidates for stationary and mobile power generation due to their high energy yield and low environmental impact of hydrogen oxidation. The oxygen reduction reaction (ORR) at cathode is a very complex process and plays a crucial role during operation of the PEM fuel cells. However, its mechanism and the nature of intermediates involved remain vague. This chapter focuses on the recent theoretical modeling studies of ORR catalysts for PEMFC. Recent theoretical investigations on oxygen reduction electrocatalysts, such as Pt-based catalysts, non-Pt metal catalysts (Pd, Ir, CuCl), and non-precious metal catalysts (transitional metal macrocyclic complexes, conductive polymer materials, and carbon-based materials), are reviewed. The oxygen reduction mechanisms catalyzed by these catalysts are discussed based on the results. © Springer-Verlag London 2013.",,Carbon based materials; Macrocyclic complex; Mobile power generation; Non-precious metal catalysts; Oxygen reduction reaction; Theoretical investigations; Theoretical modeling; Transitional metals; Catalysis; Electrocatalysis; Electrolysis; Electrolytic reduction; Environmental impact; Palladium compounds; Platinum; Precious metals; Proton exchange membrane fuel cells (PEMFC); Catalysts,Carbon based materials;Macrocyclic complex;Mobile power generation;Non-precious metal catalysts;Oxygen reduction reaction;Theoretical investigations;Theoretical modeling;Transitional metals;Catalysis;Electrocatalysis;Electrolysis;Electrolytic reduction;Environmental impact;Palladium compounds;Platinum;Precious metals;Proton exchange membrane fuel cells (PEMFC);Catalysts,"D. Xia; College of Engineering, Peking University, Haidian District, Beijing, 100871, No.5 Yiheyuan Road, China; email: dgxia@pku.edu.cn","Shao, M.",,,,,,21951284,9783319008219; 9783642258862; 9781447146667; 9781447143840; 9783319269481; 9781447147268; 9781447149101; 9781447149675; 9781447147862; 9781447151395,,,English,Lecture Notes in Energy,Article,Scopus,,2-s2.0-84882950496,,China;Canada,pku.edu.cn,,,"Chen, X.; Xia, D.; Shi, Z.; Zhang, J."
"Yaengthip, P., Siyasukh, A., Payattikul, L., Kiatsiriroat, T., Punyawudho, K.",The ORR activity of nitrogen doped-reduced graphene oxide below decomposition temperature cooperated with cobalt prepared by strong electrostatic adsorption technique,2022,Journal of Electroanalytical Chemistry,915,,116366,,,,16,10.1016/j.jelechem.2022.116366,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85129642761&doi=10.1016%2Fj.jelechem.2022.116366&partnerID=40&md5=2496be2373be5e1d34886c432b4e23d4,"Department of Mechanical Engineering, Chiang Mai University, Chiang Mai, Chiang Mai, Thailand; Department of Industrial Chemistry, Chiang Mai University, Chiang Mai, Chiang Mai, Thailand; Energy Harvesting and Storage Laboratory, Chiang Mai University, Chiang Mai, Chiang Mai, Thailand; Center of Clean Energy Development for Green, Chiang Mai University, Chiang Mai, Chiang Mai, Thailand","Yaengthip, P., Department of Mechanical Engineering, Chiang Mai University, Chiang Mai, Chiang Mai, Thailand; Siyasukh, Adisak, Department of Industrial Chemistry, Chiang Mai University, Chiang Mai, Chiang Mai, Thailand; Payattikul, Laksamee, Department of Mechanical Engineering, Chiang Mai University, Chiang Mai, Chiang Mai, Thailand, Energy Harvesting and Storage Laboratory, Chiang Mai University, Chiang Mai, Chiang Mai, Thailand; Kiatsiriroat, Tanongkiat, Department of Mechanical Engineering, Chiang Mai University, Chiang Mai, Chiang Mai, Thailand, Center of Clean Energy Development for Green, Chiang Mai University, Chiang Mai, Chiang Mai, Thailand; Punyawudho, Konlayutt, Department of Mechanical Engineering, Chiang Mai University, Chiang Mai, Chiang Mai, Thailand, Energy Harvesting and Storage Laboratory, Chiang Mai University, Chiang Mai, Chiang Mai, Thailand","Nitrogen doped reduced graphene oxide (NG) was prepared using urea as a nitrogen source. The pyrolysis temperature was carried on at 300, 400, 500 and 800 °C, where it was below and above the urea decomposition temperature (350 °C), respectively. Pyrrolic-N was the main component of NG300, whereas pyridinic-N was the major component of NG800. Moreover, NG300 had greater nitrogen content and performed a bit better in oxygen reduction reaction (ORR) activity. The points of zero charge were determined in order to adsorb cobalt precursor. Afterward, cobalt metal was impregnated onto NGs by strong electrostatic adsorption at pH 12.0. The Co/NG300 had better metal distribution, and the average Co particle size was about 14.0 nm, while Co/NG800 was composed of a lump of metals due to the agglomeration of cobalt. Nitrogen composition decreased after the synergy with Co, but its content on Co/NG300 was still greater than Co/NG800. The Co-Nx structure, where x can be 2 and 4 according to pyrrolic-N and pyridinic-N configuration, was identified for both Co/NGs; nitrogen atoms were chelated to the edges and the defects of the NG moiety. Co/NG300 had superior ORR activity over the other samples, and it had outstanding durability and stability after running within saturated oxygen for over 2000 cycles. This is probably attributed to its lower pyrolysis temperature yielding a high density of nitrogen and Co-Nx active sites. © 2022 Elsevier B.V.",Cobalt; Nitrogen doped reduced graphene oxide; Non-PGM catalysts; ORR activity; PEM fuel cell; Strong electrostatic adsorption,Adsorption; Catalyst activity; Cobalt; Cobalt compounds; Electrolytic reduction; Electrostatics; Graphene; Metabolism; Oxygen; Particle size; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Pyrolysis; Urea; Decomposition temperature; Nitrogen doped reduced graphene oxide; Nitrogen-doped; Non-PGM catalysts; Oxygen reduction reaction; Oxygen reduction reaction activity; PEM fuel cell; Reaction activity; Reduced graphene oxides; Strong electrostatic adsorptions; Doping (additives),Cobalt;Nitrogen doped reduced graphene oxide;Non-PGM catalysts;ORR activity;PEM fuel cell;Strong electrostatic adsorption;Adsorption;Catalyst activity;Cobalt compounds;Electrolytic reduction;Electrostatics;Graphene;Metabolism;Oxygen;Particle size;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Pyrolysis;Urea;Decomposition temperature;Nitrogen-doped;Oxygen reduction reaction;Oxygen reduction reaction activity;Reaction activity;Reduced graphene oxides;Strong electrostatic adsorptions;Doping (additives),"K. Punyawudho; Department of Mechanical Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai, 50200, Thailand; email: konlayutt.p@cmu.ac.th",,,,,,Elsevier B.V.,15726657,,JECHE,,English,J Electroanal Chem,Article,Scopus,,2-s2.0-85129642761,,Thailand,cmu.ac.th,,,"Yaengthip, P.; Siyasukh, A.; Payattikul, L.; Kiatsiriroat, T.; Punyawudho, K."
"Glibin, V.P., Dodelet, J.P.",Thermodynamic Stability in Acid Media of FeN4-Based Catalytic Sites Used for the Reaction of Oxygen Reduction in PEM Fuel Cells,2017,JOURNAL OF THE ELECTROCHEMICAL SOCIETY,164,9,,P948,P957,10,34,10.1149/2.1041709jes,,"[Glibin, Vassili P.] Univ Western Ontario, Dept Chem & Biochem Engn, London, ON N6A 5B9, Canada; [Dodelet, Jean-Pol] INRS, Ctr Energie Mat & Commun, Bd Lionel Boulet, Varennes, PQ J3X 1S2, Canada",,"Two types of Fe-based catalytic sites have been proposed in the literature to perform the oxygen reduction reaction in PEM fuel cells running with FeN4-based electrocatalysts: [FeN4/C] or [FeN4C12] derived from the molecular structure of iron-porphyrin, and [FeN2+2/C], derived from the structure of the iron complex with two phenanthroline molecules. The energetics and chemical thermodynamic stability (equilibrium constants, K-c, for iron acid leaching) of these two types of sites and some of their oxygenated forms have been determined at pH similar to 0. This does not consider the direct or indirect electrochemical oxidation of these catalytic sites or the electro-corrosion of their support. All evaluated FeN4-based sites are chemically stable in acid at both 298 and 353 K. It is their high values of T Delta S contribution to the Gibbs free energy for acid leaching which are responsible for the stability of these catalytic sites. The dioxygen and hydroxyl complexes of [FeN4C12] and [FeN2+2/C] electrocatalysts demonstrate an improved stability with increasing temperature, explained by their electron withdrawing properties and their effect on the number of electrons in the antibonding orbitals. Complexes with dioxygen are more resistant to the action of acid than the ones formed by chemisorption of OH-groups. (C) The Author(s) 2017. Published by ECS. All rights reserved.",,DENSITY-FUNCTIONAL THEORY; VALENCE SUM ANALYSIS; ELECTRONIC-STRUCTURE; CRYSTAL-STRUCTURE; FE/N/C CATALYSTS; INFRARED-SPECTRA; TRANSITION-METAL; BOND LENGTHS; AB-INITIO; IRON,DENSITY-FUNCTIONAL THEORY;VALENCE SUM ANALYSIS;ELECTRONIC-STRUCTURE;CRYSTAL-STRUCTURE;FE/N/C CATALYSTS;INFRARED-SPECTRA;TRANSITION-METAL;BOND LENGTHS;AB-INITIO;IRON,vassili.glibin@gmail.com,,"65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA",,,,ELECTROCHEMICAL SOC INC,0013-4651,,,,English,J ELECTROCHEM SOC,Article,WoS,Electrochemistry; Materials Science,WOS:000413256400042,,Canada,gmail.com,Univ Western Ontario;INRS,"Univ Western Ontario, Canada;INRS, Canada","Glibin, Vassili P.; Dodelet, Jean-Pol"
"Chen, C., Lai, Y.J., Zhou, Z., Zhang, X., Sun, S.",Thermo-Stability and Active Site Structure of Fe/N/C Electrocatalyst for Oxygen Reduction Reaction; Fe/N/C氧还原催化剂的热稳定性及活性位结构,2017,Journal of Electrochemistry,23,4,,400,408,,4,10.13208/j.electrochem.170324,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85149258762&doi=10.13208%2Fj.electrochem.170324&partnerID=40&md5=c7923e363451ab6af3bf09eadf919ca2,"State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, China; Department of Chemistry, Xiamen University, Xiamen, Fujian, China","Chen, Chi, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, China, Department of Chemistry, Xiamen University, Xiamen, Fujian, China; Lai, Yujiao, Department of Chemistry, Xiamen University, Xiamen, Fujian, China; Zhou, Zhiyou, Department of Chemistry, Xiamen University, Xiamen, Fujian, China; Zhang, Xinsheng, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, China; Sun, Shigang, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, China, Department of Chemistry, Xiamen University, Xiamen, Fujian, China","The development of Fe/N/C electrocatalyst for oxygen reduction reaction (ORR) is vital for the large-scale applications of proton exchange membrane fuel cells. Understanding the active site structure will contribute to the rational design of highly active catalysts. In this study, the as-prepared Fe/N/C catalyst based on poly-m-phenylenediamine (PmPDA-FeN<inf>x</inf>/C) catalyst with the high ORR activity was subjected to the high-temperature heat treatment at 1000 ∼ 1500 °C. The degradation in the ORR activity of PmPDA-FeN<inf>x</inf>/C with various heat treatments was correlated to the change of elemental compositions, chemical states and textural properties. As the temperature elevated, the Fe atoms aggregated to form nanoparticles, while the gaseous N-containing species volatilized and the amount of N contents decreased, resulting in the destruction of active sites. The XPS analysis revealed that the content of N species with low binding energy show good positive correlation with the ORR kinetic current of catalyst, demonstrating that the pyridinic N and Fe-N species are probably main components of active sites and contribute to the high ORR activity. This study provides a new strategy to investigate the nature of active centre. © 2017 Journal of Electrochemistry. All rights reserved.",active sites; Fe-N species; Fe/N/C electrocatalyst; oxygen reduction reaction; pyridinic N,,active sites;Fe-N species;Fe/N/C electrocatalyst;oxygen reduction reaction;pyridinic N,"X.-S. Zhang; State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; email: xszhang@ecust.edu.cn; S.-G. Sun; State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; email: sgsun@xmu.edu.cn",,,,,,Chinese Chemical Society,10063471,,,,Chinese,J. Electrochem.,Article,Scopus,,2-s2.0-85149258762,,China,ecust.edu.cn,,,"Chen, C.; Lai, Y.-J.; Zhou, Z.; Zhang, X.; Sun, S."
"Dyjak, S., Tokarz, W., Blachowski, A., Gratzke, M., Szczesniak, B., Sobczak, K., Kicinski, W.",The role of chalcogen doping in Fe - N - C catalysts for hydrogen-air polymer electrolyte fuel cells: Selenium doped Fe - N - C,2024,JOURNAL OF POWER SOURCES,609,,234612,,,14,3,10.1016/j.jpowsour.2024.234612,,"[Dyjak, Slawomir; Gratzke, Mateusz; Szczesniak, Barbara; Kicinski, Wojciech] Mil Univ Technol, Inst Chem, 2 Kaliskiego Str, PL-00908 Warsaw, Poland; [Tokarz, Wojciech] Lukasiewicz Res Network, Moscicki Ind Chem Res Inst ICRI, 8 Rydygiera Str, PL-01793 Warsaw, Poland; [Blachowski, Artur] AGH Univ Sci & Technol, Fac Geol Geophys & Environm Protect, 30 Mickiewicza Ave, PL-059 Krakow, Poland; [Sobczak, Kamil] Univ Warsaw, Biol & Chem Res Ctr, Zwirki i Wigury 101 Str, PL-02089 Warsaw, Poland",,"A spectrum of selenium-doped Fe-N-C catalysts is prepared and scrutinized for acidic oxygen reduction reactions to understand the impact of the presence and amount of chalcogen dopants on the catalytic performance as cathode catalyst layers (CCLs) for H 2 -O 2 and H 2 -air polymer electrolyte membrane fuel cells (PEMFCs). While for a high initial content of Se, all available iron is bonded into iron selenides, a low amount of Se doping yields Fe-N-C catalysts of extensive microporosity, increased nitrogen content, and iron occurring predominantly in the Fe-N x coordination state. The chemistry of the iron-carbon-selenium (Fe-C-Se) system is studied in detail to elucidate the impact of Se on Fe-N-C catalyst formation during pyrolysis. The performance of the Se -doped platinum group metal-free Fe-N-C catalysts in PEMFCs is compared with their commercially available counterpart. The effect of the catalysts' morphology alternation by ball-milling on their performance is also studied. It is concluded that chalcogen doping (either S or Se doping) indirectly impacts Fe-N-C catalyst activity by controlling carbon scaffold properties, while the idea of a direct impact of chalcogen atoms on the Fe-N x catalytic centers is challenged.",Oxygen reduction reaction; Platinum group metal-free catalysts; Iron-nitrogen-carbon catalysts; Selenium doping; Chalcogen; Proton exchange membrane fuel cell,OXYGEN REDUCTION REACTION; ACTIVE-SITES; MOSSBAUER; PERFORMANCE; SULFUR; CARBON; ELECTROCATALYST; TRANSPORT,Oxygen reduction reaction;Platinum group metal-free catalysts;Iron-nitrogen-carbon catalysts;Selenium doping;Chalcogen;Proton exchange membrane fuel cell;ACTIVE-SITES;MOSSBAUER;PERFORMANCE;SULFUR;CARBON;ELECTROCATALYST;TRANSPORT,slawomir.dyjak@wat.edu.pl; wojciech.kicinski@wat.edu.pl,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:001240401300001,2-s2.0-85192432448,Poland,wat.edu.pl,Mil Univ Technol;Lukasiewicz Res Network;AGH Univ Sci & Technol;Univ Warsaw,"Mil Univ Technol, Poland;Lukasiewicz Res Network, Poland;AGH Univ Sci & Technol, Poland;Univ Warsaw, Poland","Dyjak, Slawomir; Tokarz, Wojciech; Blachowski, Artur; Gratzke, Mateusz; Szczesniak, Barbara; Sobczak, Kamil; Kicinski, Wojciech"
"Oh, H.S., Kim, H.",The role of transition metals in non-precious nitrogen-modified carbon-based electrocatalysts for oxygen reduction reaction,2012,JOURNAL OF POWER SOURCES,212,,,220,225,6,109,10.1016/j.jpowsour.2012.03.098,,"[Oh, Hyung-Suk; Kim, Hansung] Yonsei Univ, Dept Chem & Biomol Engn, Seoul 120749, South Korea",,"This study examines the role of transition metals (Co or Fe) on nitrogen-modified carbon-based catalysts for the oxygen reduction reaction (ORR). The nitrogen-modified carbon-based catalysts are synthesized by the pyrolysis process in the presence of polypyrrole (PPy) and ethylenediamine (ED) with different amounts of transition metals. Electrochemical data and inductively coupled plasma-atomic emission spectroscopy (ICP-AES) analysis do not support that the transition metal itself behaves as an active site for ORR. The X-ray photoelectron spectroscopy (XPS) and elemental analysis results show that the total nitrogen content and the active nitrogen functional groups, such as pyridinic-N and graphitic-N, are strongly dependent on the type of transition metal and the amount of transition metal used. Therefore, it is believed that transition metals serve to catalyze the formation of active nitrogen functional groups for the ORR by doping nitrogen into carbon. (C) 2012 Elsevier B.V. All rights reserved.",Non-precious metal catalyst; Oxygen reduction reaction; Transition metal; Active site; Polymer electrolyte membrane fuel cell,PEM FUEL-CELLS; COMPOSITE CATALYSTS; O-2 REDUCTION; CATHODE; POLYPYRROLE; STABILITY; MECHANISM; ARRAYS,Non-precious metal catalyst;Oxygen reduction reaction;Transition metal;Active site;Polymer electrolyte membrane fuel cell;PEM FUEL-CELLS;COMPOSITE CATALYSTS;O-2 REDUCTION;CATHODE;POLYPYRROLE;STABILITY;MECHANISM;ARRAYS,elchem@yonsei.ac.kr,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:000305592900027,2-s2.0-84860586229,South Korea,yonsei.ac.kr,Yonsei Univ,"Yonsei Univ, South Korea","Oh, Hyung-Suk; Kim, Hansung"
"Liu, Q.T., Liu, X.F., Zheng, L.R., Shui, J.L.",The Solid-Phase Synthesis of an Fe-N-C Electrocatalyst for High-Power Proton-Exchange Membrane Fuel Cells,2018,ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,57,5,,1204,1208,5,335,10.1002/anie.201709597,,"[Liu, Qingtao; Liu, Xiaofang; Shui, Jianglan] Beihang Univ, Sch Mat Sci & Engn, 37 Xueyuan Rd, Beijing 100083, Peoples R China; [Zheng, Lirong] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, 19 Yuquan Rd, Beijing 100049, Peoples R China",,"The environmentally friendly synthesis of highly active Fe-N-C electrocatalysts for proton-exchange membrane fuel cells (PEMFCs) is desirable but remains challenging. A simple and scalable method is presented to fabricate Fe-II-doped ZIF-8, which can be further pyrolyzed into Fe-N-C with 3wt% of Fe exclusively in Fe-N-4 active moieties. Significantly, this Fe-N-C derived acidic PEMFC exhibits an unprecedented current density of 1.65 A cm(-2) at 0.6V and the highest power density of 1.14 W cm(-2) compared with previously reported NPMCs. The excellent PEMFC performance can be attributed to the densely and atomically dispersed Fe-N-4 active moieties on the small and uniform catalyst nanoparticles.",electrocatalysis; fuel cells; iron; oxygen reduction reaction; solid-phase synthesis,OXYGEN-REDUCTION REACTION; METAL ELECTROCATALYSTS; POROUS CARBON; IRON; CATALYST; IDENTIFICATION; POLYANILINE; PERFORMANCE; FRAMEWORKS; SITES,electrocatalysis;fuel cells;iron;oxygen reduction reaction;solid-phase synthesis;OXYGEN-REDUCTION REACTION;METAL ELECTROCATALYSTS;POROUS CARBON;CATALYST;IDENTIFICATION;POLYANILINE;PERFORMANCE;FRAMEWORKS;SITES,liux05@buaa.edu.cn; shuijianglan@buaa.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,,,,29210167,English,ANGEW CHEM INT EDIT,Article,WoS,Chemistry,WOS:000422940600008,2-s2.0-85040813893,China,buaa.edu.cn,Beihang Univ;Chinese Acad Sci,"Beihang Univ, China;Chinese Acad Sci, China","Liu, Qingtao; Liu, Xiaofang; Zheng, Lirong; Shui, Jianglan"
"Huang, S., Qiao, Z., Sun, P., Qiao, K., Pei, K., Yang, L., Xu, H., Wang, S., Huang, Y., Yan, Y., Cao, D.",The strain induced synergistic catalysis of FeN4 and MnN3 dual-site catalysts for oxygen reduction in proton- /anion- exchange membrane fuel cells,2022,Applied Catalysis B: Environmental,317,,121770,,,,128,10.1016/j.apcatb.2022.121770,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85134756772&doi=10.1016%2Fj.apcatb.2022.121770&partnerID=40&md5=4d990e04c8295756e8bfb944b16eee82,"State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, United States","Huang, Shiqing, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Qiao, Zelong, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Sun, Panpan, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Qiao, Kangwei, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Pei, Kun, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Yang, Liu, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Xu, Haoxiang, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Wang, Shitao, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Huang, Yan, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Yan, Yushan, Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, United States; Cao, Dapeng, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China","The Fe-N-C single-atom catalysts (SACs) have been widely explored for oxygen reduction reaction (ORR) in fuel cells. However, how to improve the ORR activity by tailoring the electronic structure of Fe-N-C catalysts is challenging. Herein, we synthesize a Fe-Mn-N-C dual-atom catalyst (DAC) with new local structure of FeN<inf>4</inf>-MnN<inf>3</inf> moiety, and it exhibits ultralow H<inf>2</inf>O<inf>2</inf> yield and better ORR performance than Fe-N-C and Mn-N-C SACs. Importantly, the Fe-Mn-N-C-based proton-/anion- exchange membrane fuel cells present ultrahigh power densities of 1.048 W cm−2 and 1.321 W cm−2, respectively. DFT results reveal that the strain yielded by the formation of Mn-Fe bond significantly optimizes the electronic structure of the Fe-Mn-N-C, and the co-adsorption of the Fe-Mn dual-sites for *OOH not only almost completely suppresses the 2e- ORR, but also breaks the linear correlation between G<inf>OH*</inf> and G<inf>OOH*</inf> proposed by Norskov et al., which provides a new route for the design of dual- site catalysts. © 2022 Elsevier B.V.",Dual-atom catalysts; Oxygen reduction reaction; Proton-/anion- exchange membrane fuel cells; Strain effect; Synergistic catalysis,Binary alloys; Catalysis; Catalysts; Design for testability; Electrolytic reduction; Electronic structure; Oxygen; Proton exchange membrane fuel cells (PEMFC); Anion-exchange membrane fuel cells; Dual sites; Dual-atom catalyst; Electronic.structure; Oxygen reduction reaction; Proton-/anion- exchange membrane fuel cell; Single-atoms; Strain effect; Synergistic catalysis; ]+ catalyst; Atoms,Dual-atom catalysts;Oxygen reduction reaction;Proton-/anion- exchange membrane fuel cells;Strain effect;Synergistic catalysis;Binary alloys;Catalysis;Catalysts;Design for testability;Electrolytic reduction;Electronic structure;Oxygen;Proton exchange membrane fuel cells (PEMFC);Anion-exchange membrane fuel cells;Dual sites;Dual-atom catalyst;Electronic.structure;Proton-/anion- exchange membrane fuel cell;Single-atoms;]+ catalyst;Atoms,"D. Cao; State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China; email: caodp@mail.buct.edu.cn",,,,,,Elsevier B.V.,09263373,,ACBEE,,English,Appl. Catal. B Environ.,Article,Scopus,,2-s2.0-85134756772,,China;United States,mail.buct.edu.cn,,,"Huang, S.; Qiao, Z.; Sun, P.; Qiao, K.; Pei, K.; Yang, L.; Xu, H.; Wang, S.; Huang, Y.; Yan, Y.; Cao, D."
"Antolini, E.",The use of silicon in the membrane electrode assembly of fuel cells,2024,CHEMCATCHEM,16,11,,,,16,4,10.1002/cctc.202301443,,"[Antolini, Ermete] Scuola Sci Mat, Via 25 Aprile 22, I-16016 Genoa, Italy",,"Silicon, silicon-based and Si-containing materials are widely used and play different roles in fuel cells. These materials have been used overall in polymer electrolyte membrane fuel cells, but also in solid oxide fuel cells and phosphoric acid fuel cells. The most used Si compounds in fuel cells are SiO2 and SiC. In this work an overview of the use of Si-based and Si-containing materials in the membrane electrode assembly of fuel cells is presented. Silicon-based and silicon-containing materials have been used in polymer electrolyte membrane fuel cells (PEMFCs), solid oxide fuel cells (SOFCs) and phosphoric acid fuel cells (PAFCs). In this work the use of silicon in the membrane electrode assembly (MEA) of fuel cells is reviewed. image",Silicon; fuel cells; electrolyte; supported catalysts; oxygen reduction,PROTON-EXCHANGE MEMBRANE; OXYGEN REDUCTION REACTION; NAFION COMPOSITE MEMBRANES; SIO2-CONTAINING CATALYST LAYERS; METAL-FREE ELECTROCATALYSTS; HIGH-TEMPERATURE OPERATION; FE-N/C ELECTROCATALYSTS; SOL-GEL PROCESS; DOPED GRAPHENE; MESOPOROUS SILICA,Silicon;fuel cells;electrolyte;supported catalysts;oxygen reduction;PROTON-EXCHANGE MEMBRANE;OXYGEN REDUCTION REACTION;NAFION COMPOSITE MEMBRANES;SIO2-CONTAINING CATALYST LAYERS;METAL-FREE ELECTROCATALYSTS;HIGH-TEMPERATURE OPERATION;FE-N/C ELECTROCATALYSTS;SOL-GEL PROCESS;DOPED GRAPHENE;MESOPOROUS SILICA,,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1867-3880,,,,English,CHEMCATCHEM,Review,WoS,Chemistry,WOS:001178788900001,,Italy,No email,Scuola Sci Mat,"Scuola Sci Mat, Italy","Antolini, Ermete"
"Pang, Y.H., Gao, R., Song, Y.J., Xu, H., Wang, Y.",Three-dimensional modeling with experimental validation of non-PGM polymer electrolyte membrane fuel cells,2025,ETRANSPORTATION,26,,100479,,,11,0,10.1016/j.etran.2025.100479,,"[Pang, Yiheng; Wang, Yun] Univ Calif Irvine, Dept Mech & Aerosp Engn, Renewable Energy Resources Lab, Irvine, CA 92697 USA; [Gao, Rui; Song, Yujiang] Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Liaoning, Peoples R China; [Xu, Hui] Giner Inc, Newton, MA 02466 USA",,"High catalyst cost impedes PEM fuel cell (PEMFC) commercialization, making the development of highperformance non-platinum(Pt) group metal (PGM) cathode catalyst layers (CLs) critical for advancing fuel cell technology. CLs contribute to a major portion of PEMFCs cost due to the use of PGM catalysts. To reduce the cost, non-PGM catalysts offer a viable alternative to low-Pt loading. In this study, we develop a three-dimensional (3D) model to investigate the reaction rate, oxygen, and liquid water distributions in PEMFCs with a focus on the non-PGM cathode catalyst layer, which provides unique insights into electrochemically coupled transport processes that cannot be resolved by reduced-dimension or experimental approaches. Experiments were conducted using two types of non-PGM catalysts, including Fe-N-C and Mn-N-C based materials, to validate the 3-D model predictions. It is shown that CL properties such as catalyst materials, porosity, and ionomer content can play important roles in PEMFCs voltage gain, highlighting the performance impact of non-PGM catalysts. Large variations in the liquid water and oxygen contents occur in the gas diffusion layer from the land to channel under 1 A/cm2. The through-plane distributions under the channel show large spatial variations across the non-PGM CLs in oxygen and the electrolyte phase potential. Liquid water shows little change across the catalyst layer based on the 3-D model prediction. These findings advance PEMFC development by informing the design of durable, high-performance non-PGM CLs to reduce fuel cell cost for transportation applications.",Polymer electrolyte membrane fuel cell; 3-D modeling; Catalyst layer; Non-PGM; Experimental,OXYGEN REDUCTION REACTION; NEUTRON-RADIOGRAPHY; WATER DISTRIBUTION; CATHODE ELECTRODE; REACTION-RATES; IN-SITU; LAYER; PERFORMANCE; MORPHOLOGY; TRANSPORT,Polymer electrolyte membrane fuel cell;3-D modeling;Catalyst layer;Non-PGM;Experimental;OXYGEN REDUCTION REACTION;NEUTRON-RADIOGRAPHY;WATER DISTRIBUTION;CATHODE ELECTRODE;REACTION-RATES;IN-SITU;LAYER;PERFORMANCE;MORPHOLOGY;TRANSPORT,yjsong@dlut.edu.cn; huixsu@gmail.com; yunw@uci.edu,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2590-1168,,,,English,ETRANSPORTATION,Article,WoS,Energy & Fuels; Engineering; Transportation,WOS:001574304000001,2-s2.0-105015865404,United States;China,dlut.edu.cn,Univ Calif Irvine;Dalian Univ Technol;Giner Inc,"Univ Calif Irvine, United States;Dalian Univ Technol, China;Giner Inc, United States","Pang, Yiheng; Gao, Rui; Song, Yujiang; Xu, Hui; Wang, Yun"
"Wu, Y.J., Wang, Y.C., Wang, R.X., Zhang, P.F., Yang, X.D., Yang, H.J., Li, J.T., Zhou, Y., Zhou, Z.Y., Sun, S.G.",Three-Dimensional Networks of S-Doped Fe/N/C with Hierarchical Porosity for Efficient Oxygen Reduction in Polymer Electrolyte Membrane Fuel Cells,2018,ACS APPLIED MATERIALS & INTERFACES,10,17,,14602,14613,12,56,10.1021/acsami.7b19332,,"[Wu, Yi-Jin; Zhang, Peng-Fang; Li, Jun-Tao; Zhou, Yao; Sun, Shi-Gang] Xiamen Univ, Coll Energy, Xiamen 361005, Peoples R China; [Wang, Yu-Cheng; Wang, Rui-Xiang; Yang, Xiao-Dong; Yang, Hui-Juan; Zhou, Zhi-You; Sun, Shi-Gang] Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China",,"Reasonable design and synthesis of Fe/N/C-based catalysts is one of the most promising way for developing precious metal-free oxygen reduction reaction (ORR) catalysts in acidic mediums. Herein, we developed a highly active metal- organic framework-derived S-doped Fe/N/C catalyst [S-Fe/Z8/2-aminothiazole (2-AT)] prepared by thermal treatment. The S-Fe/Z8/2-AT catalyst with uniform S-doping possesses a three-dimensional macro-meso-micro hierarchically porous structure. Moreover, the chemical composition and structural features have been well-optimized and characterized for such S-Fe/Z8/2-AT catalysts; and their formation mechanism was also revealed. Significantly, applying the optimal S-Fe/Z8/2-AT catalysts into electrocatalytic test exhibits remarkable ORR catalytic activity with a half-wave potential of 0.82 V (vs reversible hydrogen electrode) and a mass activity of 18.3 A g(-1) at 0.8 V in 0.1 M H2SO4 solution; the polymer electrolyte membrane fuel cell test also confirmed their excellent catalytic activity, which gives a maximal power density as high as 800 mW cm(-2) at 1 bar. A series of designed experiments disclosed that the favorable structural merits and desirable chemical compositions of S-Fe/Z8/2-AT catalysts are critical factors for efficient electrocatalytic performance. The work provides a new approach to open an avenue for accurately controlling the composition and structure of Fe/N/C catalysts with highly activity for ORR.",S-doping Fe/N/C; 3D networks; hierarchical porosity; oxygen reduction reaction; PEMCFs,METAL-ORGANIC FRAMEWORK; N-C CATALYSTS; NONPRECIOUS ELECTROCATALYSTS; CARBON NANOTUBES; HIGHLY EFFICIENT; POROUS CARBON; HETEROATOM (N; ACTIVE-SITES; GRAPHENE; NITROGEN,S-doping Fe/N/C;3D networks;hierarchical porosity;oxygen reduction reaction;PEMCFs;METAL-ORGANIC FRAMEWORK;N-C CATALYSTS;NONPRECIOUS ELECTROCATALYSTS;CARBON NANOTUBES;HIGHLY EFFICIENT;POROUS CARBON;HETEROATOM (N;ACTIVE-SITES;GRAPHENE;NITROGEN,jtli@xmu.edu.cn,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1944-8244,,,29565123,English,ACS APPL MATER INTER,Article,WoS,Science & Technology - Other Topics; Materials Science,WOS:000431723400040,2-s2.0-85046370341,China,xmu.edu.cn,Xiamen Univ,"Xiamen Univ, China","Wu, Yi-Jin; Wang, Yu-Cheng; Wang, Rui-Xiang; Zhang, Peng-Fang; Yang, Xiao-Dong; Yang, Hui-Juan; Li, Jun-Tao; Zhou, Yao; Zhou, Zhi-You; Sun, Shi-Gang"
"Luo, Y., Li, K., Hu, Y.J., Chen, T., Wang, Q.C., Hu, J.Q., Feng, J., Feng, J.Z.",TiN as Radical Scavenger in Fe―N―C Aerogel Oxygen Reduction Catalyst for Durable Fuel Cell,2024,SMALL,20,30,,,,11,20,10.1002/smll.202309822,,"[Luo, Yi; Hu, Yijie; Feng, Jian; Feng, Junzong] Natl Univ Def Technol, Coll Aerosp Sci & Engn, Sci & Technol Adv Ceram Fibers & Composites Lab, 109 De Ya Rd, Changsha 410073, Hunan, Peoples R China; [Luo, Yi; Chen, Teng; Hu, Jianqiang] AF Logist Acad, Dept Aviat Oil & Mat, 72 Xi Ge Rd, Xuzhou 221000, Jiangsu, Peoples R China; [Li, Ke] Wuhan Univ, Coll Chem & Mol Sci, 299 Ba Yi Rd, Wuhan 300720, Hubei, Peoples R China; [Wang, Qichen] Southern Univ Sci & Technol, Dept Chem, 1088 Xueyuan Rd, Shenzhen 518055, Peoples R China",,"FeNC is the most promising alternative to platinum-based catalysts to lower the cost of proton-exchange-membrane fuel cell (PEMFC). However, the deficient durability of FeNC has hindered their application. Herein, a TiN-doped FeNC (FeNC/TiN) is elaborately synthesized via the sol-gel method for the oxygen-reduction reaction (ORR) in PEMFC. The interpenetrating network composed by FeNC and TiN can simultaneously eliminate the free radical intermediates while maintaining the high ORR activity. As a result, the H2O2 yields of FeNC/TiN are suppressed below 4%, approximate to 4 times lower than the FeNC, and the half-wave potential only lost 15 mV after 30 kilo-cycle accelerated durability test (ADT). In a H2O2 fuel cell assembled with FeNC/TiN, it presents 980 mA cm-2 current density at 0.6 V, 880 mW cm-2 peak power density, and only 17 mV voltage loss at 0.80 A cm-2 after 10 kilo-cycle ADT. The experiment and calculation results prove that the TiN has a strong adsorption interaction for the free radical intermediates (such as *OH, *OOH, etc.), and the radicals are scavenged subsequently. The rational integration of Fe single-atom, TiN radical scavenger, and highly porous network adequately utilize the intrinsic advantages of composite structure, enabling a durable and active Pt-metal-free catalyst for PEMFC. This work presents a TiN-doped FeNC aerogel via the sol-gel method for the oxygen reduction reaction (ORR) in PEMFC. The TiN can eliminate the radical intermediates while Fe single-atoms catalyze the ORR. The rational design that combines the advantages of Fe single-atom, TiN radical scavenger, and highly porous network enables a durable and active Pt-metal-free catalyst for PEMFC. image",aerogel; durability; FeNC; proton exchange membrane fuel cell; radical scavenger; TiN,CATHODE CATALYSTS; ELECTROCATALYSTS; EFFICIENT; DEGRADATION; DURABILITY; TIO2,aerogel;durability;FeNC;proton exchange membrane fuel cell;radical scavenger;TiN;CATHODE CATALYSTS;ELECTROCATALYSTS;EFFICIENT;DEGRADATION;TIO2,ly@nudt.edu.cn; wangqc@sustech.edu.cn; hjq555918@sohu.com; junzongfeng@nudt.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1613-6810,,,38396268,English,SMALL,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:001169770300001,,China,nudt.edu.cn,Natl Univ Def Technol;AF Logist Acad;Wuhan Univ;Southern Univ Sci & Technol,"Natl Univ Def Technol, China;AF Logist Acad, China;Wuhan Univ, China;Southern Univ Sci & Technol, China","Luo, Yi; Li, Ke; Hu, Yijie; Chen, Teng; Wang, Qichen; Hu, Jianqiang; Feng, Jian; Feng, Junzong"
"Reshetenko, T., Serov, A., Artyushkova, K., Matanovic, I., Stariha, S., Atanassov, P.",Tolerance of non-platinum group metals cathodes proton exchange membrane fuel cells to air contaminants,2016,Journal of Power Sources,324,,,556,571,,40,10.1016/j.jpowsour.2016.05.090,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84975456871&doi=10.1016%2Fj.jpowsour.2016.05.090&partnerID=40&md5=0ce975e87eca89642fba5d2b03e0f57c,"Hawaii Natural Energy Institute, School of Ocean and Earth Science and Technology, Honolulu, HI, United States; University of New Mexico School of Engineering, Albuquerque, NM, United States; Los Alamos National Laboratory Theoretical Division, Los Alamos, NM, United States","Reshetenko, Tatyana V., Hawaii Natural Energy Institute, School of Ocean and Earth Science and Technology, Honolulu, HI, United States; Serov, Alexey Alexandrovich, University of New Mexico School of Engineering, Albuquerque, NM, United States; Artyushkova, Kateryna, University of New Mexico School of Engineering, Albuquerque, NM, United States; Matanovic, Ivana, University of New Mexico School of Engineering, Albuquerque, NM, United States, Los Alamos National Laboratory Theoretical Division, Los Alamos, NM, United States; Stariha, Sarah A., University of New Mexico School of Engineering, Albuquerque, NM, United States; Atanassov, Plamen B., University of New Mexico School of Engineering, Albuquerque, NM, United States","The effects of major airborne contaminants (SO<inf>2</inf>, NO<inf>2</inf> and CO) on the spatial performance of Fe/N/C cathode membrane electrode assemblies were studied using a segmented cell system. The injection of 2-10 ppm SO<inf>2</inf> in air stream did not cause any performance decrease and redistribution of local currents due to the lack of stably adsorbed SO<inf>2</inf> molecules on Fe-N<inf>x</inf> sites, as confirmed by density functional theory (DFT) calculations. The introduction of 5-20 ppm of CO into the air stream also did not affect fuel cell performance. The exposure of Fe/N/C cathodes to 2 and 10 ppm NO<inf>2</inf> resulted in performance losses of 30 and 70-75 mV, respectively. DFT results showed that the adsorption energies of NO<inf>2</inf> and NO were greater than that of O<inf>2</inf>, which accounted for the observed voltage decrease and slight current redistribution. The cell performance partially recovered when the NO<inf>2</inf> injection was stopped. The long-term operation of the fuel cells resulted in cell performance degradation. XPS analyses of Fe/N/C electrodes revealed that the performance decrease was due to catalyst degradation and ionomer oxidation. The latter was accelerated in the presence of air contaminants. The details of the spatial performance and electrochemical impedance spectroscopy results are presented and discussed. © 2016 Elsevier B.V. All rights reserved.",Airborne contaminants; DFT; Non-platinum group metals catalysts; PEMFC; Segmented cell; XPS,Catalysts; Cathodes; Contamination; Density functional theory; Electrochemical impedance spectroscopy; Electrodes; Fuel cells; Iridium alloys; Nitrogen oxides; Platinum; Sulfur dioxide; X ray photoelectron spectroscopy; Airborne contaminants; Catalyst degradation; Current redistribution; Fuel cell performance; Membrane electrode assemblies; Non-platinum; Segmented cell; Spatial performance; Proton exchange membrane fuel cells (PEMFC),Airborne contaminants;DFT;Non-platinum group metals catalysts;PEMFC;Segmented cell;XPS;Catalysts;Cathodes;Contamination;Density functional theory;Electrochemical impedance spectroscopy;Electrodes;Fuel cells;Iridium alloys;Nitrogen oxides;Platinum;Sulfur dioxide;X ray photoelectron spectroscopy;Catalyst degradation;Current redistribution;Fuel cell performance;Membrane electrode assemblies;Non-platinum;Spatial performance;Proton exchange membrane fuel cells (PEMFC),"T. Reshetenko; Hawaii Natural Energy Institute, University of Hawaii, Honolulu, 96822, United States; email: tatyanar@hawaii.edu",,,,,,Elsevier B.V.,03787753,0444894810,JPSOD,,English,J Power Sources,Article,Scopus,,2-s2.0-84975456871,,United States,hawaii.edu,,,"Reshetenko, T.; Serov, A.; Artyushkova, K.; Matanovic, I.; Stariha, S.; Atanassov, P."
"Guo, J.W., Hu, T.H., Guo, K., Wang, J.L.",To pursue FexCoy-PANI/CNT catalysts for oxygen reduction reaction in acid medium with controlled molecular self-assembly method,2020,International Journal of Hydrogen Energy,45,54,,29655,29667,,5,10.1016/j.ijhydene.2018.10.156,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85056710640&doi=10.1016%2Fj.ijhydene.2018.10.156&partnerID=40&md5=c884c3fcbc06c082baf8dbc01cd15cae,"Tsinghua University, Beijing, China","Guo, Jianwei, Tsinghua University, Beijing, China; Hu, Tianhang, Tsinghua University, Beijing, China; Guo, Kai, Tsinghua University, Beijing, China; Wang, Jianlong, Tsinghua University, Beijing, China","The mainstream of pyrolyzed transitional metal-nitrogen-carbon (M-N-C) catalysts for ORR still confront difficulty in PEMFC application. To pursue M-N-C structure from wet chemistry at ambient temperature, this paper prepares Fe<inf>x</inf>Co<inf>y</inf>-PANI/CNT porous structures composed of amorphous Fe and Co NPs into PANI layer on CNT surface, supported by the controlled molecular self-assembly mechanism (MS). For their ORR behaviors in acid medium, all Fe<inf>x</inf>Co<inf>y</inf>-PANI/CNT catalysts demonstrate similar features as Pt-based catalyst in low current density region, and 4e pathway and active sites in pore utilization in high current density region. Specifically, we disclosed nitrogen in PANI matrix dominates specific activity for ORR, and a little transitional metal attain mass activity at maximum. The active sites mounted into PANI matrix and 4e pathway help catalysts to achieve high durability. Thus, we extend a new type of platinum-free catalyst and develop a bottom-up approach for preparation-structure-activity, expecting to drive PEMFC remarkably. © 2018 Hydrogen Energy Publications LLC",Composite Structure; Conducting polymer; In situ; Molecular Self-assembly; Oxygen reduction reaction(ORR); PEMFC,Composite structures; Conducting polymers; Electrolytic reduction; Molecular oxygen; Nitrogen; Oxygen reduction reaction; Polyaniline; Proton exchange membrane fuel cells (PEMFC); Self assembly; Bottom up approach; High current densities; Low current density; Molecular self assembly; Porous structures; Specific activity; Structure activity; Transitional metals; Catalyst activity,Composite Structure;Conducting polymer;In situ;Molecular Self-assembly;Oxygen reduction reaction(ORR);PEMFC;Composite structures;Conducting polymers;Electrolytic reduction;Molecular oxygen;Nitrogen;Oxygen reduction reaction;Polyaniline;Proton exchange membrane fuel cells (PEMFC);Self assembly;Bottom up approach;High current densities;Low current density;Molecular self assembly;Porous structures;Specific activity;Structure activity;Transitional metals;Catalyst activity,"J.-W. Guo; Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China; email: jwguo@mail.tsinghua.edu.cn; J.-L. Wang; Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China; email: wangjl@mail.tsinghua.edu.cn",,,,,,Elsevier Ltd,03603199,0080311393,IJHED,,English,Int J Hydrogen Energy,Article,Scopus,,2-s2.0-85056710640,,China,mail.tsinghua.edu.cn,,,"Guo, J.-W.; Hu, T.-H.; Guo, K.; Wang, J.-L."
"Park, S., Lee, E., Park, Y., Kim, M.G., Yoo, S.J.",Toward Hydrogen Mobility: Challenges and Strategies in Electrocatalyst Durability for Long-Term PEMFC Operation,2025,JACS AU,5,4,,1617,1632,16,7,10.1021/jacsau.5c00173,,"[Park, Subin; Lee, Eungjun; Park, Yoonsu; Kim, Myeong-Geun; Yoo, Sung Jong] Korea Inst Sci & Technol KIST, Ctr Hydrogen & Fuel Cells, Seoul 02792, South Korea; [Yoo, Sung Jong] Univ Sci & Technol UST, KIST Sch, Div Energy & Environm Technol, Daejeon 34113, South Korea",,"Proton exchange membrane fuel cells (PEMFCs) are emerging as a key technology in the transition to hydrogen-based energy systems, particularly for heavy-duty vehicles (HDVs) that face operational challenges, such as frequent startup-shutdown cycles and fuel starvation. However, the widespread adoption of PEMFCs has been limited by their durability and long-term performance issues, which are crucial for heavy-duty applications. This Perspective focuses on recent advancements in PEMFC catalysts and supports, with an emphasis on strategies to enhance their durability. We introduce Pt-based intermetallic catalysts, including Pt transition metal (TM) alloys, which offer improved stability and activity through regular atomic arrangements and strengthened metal-support interactions. Hybrid catalysts combining Pt with M-N-C (M = Fe, Co) have shown promise in boosting performance by enhancing the catalytic activity while reducing the platinum content. Moreover, stringent conditions must be met to meet the HDV requirements. Consequently, alternative support materials, such as metal oxides and graphitized carbons, have been introduced to enhance both the corrosion resistance and the electrical conductivity, thereby addressing the limitations of conventional carbon supports. Structural innovations and material advancements are essential for optimizing catalysts and supports to achieve long-term PEMFC performance. This Perspective provides a comprehensive overview of key developments in catalyst and support design, offering insights into current challenges and future directions for achieving durable and cost-effective PEMFCs.",proton exchange membrane fuel cell; oxygenreductionreaction; electrocatalyst; catalyst stability; intermetallic; carbon shell; hybrid catalyst; catalyst support,PERFORMANCE; CATALYSTS; ALLOYS; CARBON; SIZE,proton exchange membrane fuel cell;oxygenreductionreaction;electrocatalyst;catalyst stability;intermetallic;carbon shell;hybrid catalyst;catalyst support;PERFORMANCE;CATALYSTS;ALLOYS;CARBON;SIZE,mgkim@kist.re.kr; ysj@kist.re.kr,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,,,,40313820,English,JACS AU,Review,WoS,Chemistry,WOS:001456024300001,2-s2.0-105003811706,South Korea,kist.re.kr,Korea Inst Sci & Technol KIST;Univ Sci & Technol UST,"Korea Inst Sci & Technol KIST, South Korea;Univ Sci & Technol UST, South Korea","Park, Subin; Lee, Eungjun; Park, Yoonsu; Kim, Myeong-Geun; Yoo, Sung Jong"
"Jaouen, F., Jones, D., Coutard, N., Artero, V., Strasser, P., Kucernak, A.",Toward Platinum Group Metal-Free Catalysts for Hydrogen/AirProton-Exchange Membrane Fuel Cells,2018,JOHNSON MATTHEY TECHNOLOGY REVIEW,62,2,,231,255,25,118,10.1595/205651318X696828,,"[Jaouen, Frederic; Jones, Deborah] Univ Montpellier, Inst Charles Gerhardt Montpellier, CNRS, ENSCM, Pl Eugene Bataillon, F-34095 Montpellier 5, France; [Coutard, Nathan; Artero, Vincent] Univ Grenoble Alpes, CEA, CNRS, Lab Chim & Biol Metaux, 17 Rue Martyrs, F-38054 Grenoble 9, France; [Strasser, Peter] Tech Univ Berlin, Inst Chem, Str 17,Juni 124, D-10623 Berlin, Germany; [Kucernak, Anthony] Imperial Coll London, Dept Chem, South Kensington Campus, London SW7 2AZ, England",,"The status, concepts and challenges toward catalysts free of platinum group metal (pgm) elements for proton-exchange membrane fuel cells (PEMFC) are reviewed. Due to the limited reserves of noble metals in the Earth's crust, a major challenge for the worldwide development of PEMFC technology is to replace Pt with pgm-free catalysts with sufficient activity and stability. The priority target is the substitution of cathode catalysts (oxygen reduction) that account for more than 80% of pgms in current PEMFCs. Regarding hydrogen oxidation at the anode, ultralow Pt content electrodes have demonstrated good performance, but alternative non-pgm anode catalysts are desirable to increase fuel cell robustness, decrease the H-2 purity requirements and ease the transition from H-2 derived from natural gas to H-2 produced from water and renewable energy sources.",,OXYGEN-REDUCTION REACTION; ZEOLITIC-IMIDAZOLATE FRAMEWORKS; HYDROGEN OXIDATION REACTION; NITROGEN-DOPED GRAPHENE; N-C CATALYSTS; ACTIVE-SITES; H-2 OXIDATION; TUNGSTEN CARBIDES; FE/N/C-CATALYSTS; ELECTROCATALYSTS,OXYGEN-REDUCTION REACTION;ZEOLITIC-IMIDAZOLATE FRAMEWORKS;HYDROGEN OXIDATION REACTION;NITROGEN-DOPED GRAPHENE;N-C CATALYSTS;ACTIVE-SITES;H-2 OXIDATION;TUNGSTEN CARBIDES;FE/N/C-CATALYSTS;ELECTROCATALYSTS,frederic.jaouen@umontpellier.fr; vincent.artero@cea.fr,,"ORCHARD RD, ROYSTON SG8 5HE, HERTFORDSHIRE, ENGLAND",,,,JOHNSON MATTHEY PUBL LTD CO,2056-5135,,,,English,JOHNSON MATTHEY TECH,Article,WoS,Chemistry,WOS:000430179200010,,France;Germany;United Kingdom,umontpellier.fr,Univ Montpellier;Univ Grenoble Alpes;Tech Univ Berlin;Imperial Coll London,"Univ Montpellier, France;Univ Grenoble Alpes, France;Tech Univ Berlin, Germany;Imperial Coll London, United Kingdom","Jaouen, Frederic; Jones, Deborah; Coutard, Nathan; Artero, Vincent; Strasser, Peter; Kucernak, Anthony"
"Figueroba, A., Kovacs, G., Bruix, A., Neyman, K.M.",Towards stable single-atom catalysts: Strong binding of atomically dispersed transition metals on the surface of nanostructured ceria,2016,Catalysis Science and Technology,6,18,,6806,6813,,101,10.1039/c6cy00294c,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84971272673&doi=10.1039%2Fc6cy00294c&partnerID=40&md5=8aced5fd845ea12cd99cb53fe17517df,"Universitat de Barcelona, Barcelona, Barcelona, Spain; Department of Physics and Astronomy, Aarhus Universitet, Aarhus, Midtjylland, Denmark; Institució Catalana de Recerca i Estudis Avançats, Barcelona, Barcelona, Spain","Figueroba, Alberto, Universitat de Barcelona, Barcelona, Barcelona, Spain; Kovács, Gábor, Universitat de Barcelona, Barcelona, Barcelona, Spain; Bruix, Albert, Department of Physics and Astronomy, Aarhus Universitet, Aarhus, Midtjylland, Denmark; Neyman, Konstantin M., Universitat de Barcelona, Barcelona, Barcelona, Spain, Institució Catalana de Recerca i Estudis Avançats, Barcelona, Barcelona, Spain","The interaction of a series of different transition metal atoms with nanoparticulate CeO<inf>2</inf> has been studied by means of density-functional calculations. Recently, we demonstrated the ability of sites exposed on {100} nanofacets of CeO<inf>2</inf> to very strongly anchor atomic Pt, making the formed species exceptionally efficient single-atom anode catalysts for proton-exchange membrane fuel cells. Herein, we analyzed the capacity of these surface sites to accommodate all other group VIII-XI transition metal atoms M = Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Cu, Ag, and Au. The interaction of the M atoms with {100} nanofacets of ceria leads to oxidation of the former and such interaction is calculated to be stronger than the binding of the atoms in the corresponding metal nanoparticles. Comparing the stability of metal-metal and metal-oxide bonds allows one to establish which metals would more strongly resist agglomeration and hence allows the proposal of promising candidates for the design of single-atom catalysts. Indeed, the remarkable stability of these adsorption complexes (particularly for Pt, Pd, Ni, Fe, Co, and Os) strongly suggests that atomically dispersed transition metals anchored as cations on {100} facets of nanostructured ceria are stable against agglomeration into metal particles. Therefore, these sites appear to be of immediate relevance to the preparation of stable catalysts featuring the highest possible metal efficiency in nanocatalysis. © The Royal Society of Chemistry 2016.",,Agglomeration; Atoms; Bins; Catalysts; Cobalt compounds; Fuel cells; Iridium; Iron compounds; Metal nanoparticles; Metals; Nickel; Osmium; Palladium compounds; Platinum; Proton exchange membrane fuel cells (PEMFC); Ruthenium; Transition metals; Adsorption complex; Anode catalysts; Metal particle; Nano particulates; Nano-structured; Stable catalysts; Strong binding; Transition metal atoms; Palladium,Agglomeration;Atoms;Bins;Catalysts;Cobalt compounds;Fuel cells;Iridium;Iron compounds;Metal nanoparticles;Metals;Nickel;Osmium;Palladium compounds;Platinum;Proton exchange membrane fuel cells (PEMFC);Ruthenium;Transition metals;Adsorption complex;Anode catalysts;Metal particle;Nano particulates;Nano-structured;Stable catalysts;Strong binding;Transition metal atoms;Palladium,"K.M. Neyman; Departament de Química Física, Institut de Química Teòrica i Computacional, Universitat de Barcelona, Barcelona, C/Martí i Franquès 1, 08028, Spain; email: konstantin.neyman@icrea.cat",,,,,,Royal Society of Chemistry,20444753,,CSTAG,,English,Catal. Sci. Technolog.,Article,Scopus,,2-s2.0-84971272673,,Spain;Denmark,icrea.cat,,,"Figueroba, A.; Kovacs, G.; Bruix, A.; Neyman, K.M."
"Muller-Hulstede, J., Uhlig, L.M., Schmies, H., Schonvogel, D., Meyer, Q., Nie, Y., Zhao, C., Vidakovic, J., Wagner, P.",Towards the Reduction of Pt Loading in High Temperature Proton Exchange Membrane Fuel Cells - Effect of Fe-N-C in Pt-Alloy Cathodes,2023,CHEMSUSCHEM,16,5,,,,11,15,10.1002/cssc.202202046,,"[Mueller-Huelstede, Julia; Uhlig, Lisa M.; Schmies, Henrike; Schonvogel, Dana; Wagner, Peter] German Aerosp Ctr DLR, Inst Engn Thermodynam, Carl von Ossietzky Str 15, D-26129 Oldenburg, Germany; [Meyer, Quentin; Nie, Yan; Zhao, Chuan] Univ New South Wales, Sch Chem, Sydney, NSW 2052, Australia; [Vidakovic, Jurica] Trigona GmbH, Rheingaustr 190 196, D-65203 Wiesbaden, Germany",,"Pt poisoning by phosphate in high temperature proton exchange membrane fuel cells (HT-PEMFC) leads to loadings up to 1 mg(Pt) cm(-2) per electrode of costly materials. While cheaper Fe-N-C catalysts are unaffected by phosphate deactivation and contribute to the catalysis of the oxygen reduction reaction, their volumetric activity is substantially lower. In this study, the effect of Pt-loading reduced hybrid cathodes for HT-PEMFC is investigated using commercial Celtec (R)-P-based assembling. A promising effect of Fe-N-C incorporation in terms of acid attraction and activity retention is found. A longer activation (230 h, 0.3 A cm(-2)) for the hybrid membrane electrode assembly (MEA) is necessary, due to the slower acid distribution within Fe-N-Cs. This study shows the potential of Pt-content reduction by up to 25 % compared to standard MEA using hybrid electrodes. Moreover, important insights for future strategies of cell activation are revealed for these hybrid MEAs.",electrochemistry; Fe-N-C catalysts; fuel cells; gas diffusion electrodes; high temperature PEMFC,RELAXATION-TIMES; CATALYSTS; ADSORPTION; PHOSPHATE; IMPEDANCE,electrochemistry;Fe-N-C catalysts;fuel cells;gas diffusion electrodes;high temperature PEMFC;RELAXATION-TIMES;CATALYSTS;ADSORPTION;PHOSPHATE;IMPEDANCE,julia.huelstede@dlr.de,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1864-5631,,,36484108,English,CHEMSUSCHEM,Article,WoS,Chemistry; Science & Technology - Other Topics,WOS:000914769800001,,Germany;Australia,dlr.de,German Aerosp Ctr DLR;Univ New South Wales;Trigona GmbH,"German Aerosp Ctr DLR, Germany;Univ New South Wales, Australia;Trigona GmbH, Germany","Mueller-Huelstede, Julia; Uhlig, Lisa M.; Schmies, Henrike; Schonvogel, Dana; Meyer, Quentin; Nie, Yan; Zhao, Chuan; Vidakovic, Jurica; Wagner, Peter"
"Roh, J., Cho, A., Kim, S., Lee, K.S., Shin, J., Choi, J.S., Bak, J., Lee, S., Song, D., Kim, E.J., Lee, C., Uhm, Y.R., Cho, Y.H., Han, J.W., Cho, E.",Transformation of the Active Moiety in Phosphorus-Doped Fe-N-C for Highly Efficient Oxygen Reduction Reaction,2023,ACS Catalysis,13,14,,9427,9441,,76,10.1021/acscatal.3c01136,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85164973568&doi=10.1021%2Facscatal.3c01136&partnerID=40&md5=c05e116bcabe3f5d751d36e86478a7c5,"Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; School of Chemical and Biological Engineering, Seoul National University, Seoul, South Korea; Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Department of Chemical Engineering, Kangwon National University, Chuncheon, Gangwon-do, South Korea; Korea Atomic Energy Research Institute, Daejeon, South Korea","Roh, Jeonghan, Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Cho, Ara, Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; Kim, Sungjun, School of Chemical and Biological Engineering, Seoul National University, Seoul, South Korea; Lee, Kug-seung, Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; Shin, Jaewook, Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Choi, Jin-seok, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Bak, Junu, Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Lee, Sangjae, Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Song, Donghoon, Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Kim, Eom-ji, Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea; Lee, Chaewon, Korea Atomic Energy Research Institute, Daejeon, South Korea; Uhm, Young-rang, Korea Atomic Energy Research Institute, Daejeon, South Korea; Cho, Young-hun, Department of Chemical Engineering, Kangwon National University, Chuncheon, Gangwon-do, South Korea; Han, Jeongwoo, Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; Cho, Eun Ae, Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea","Iron- and nitrogen-doped carbon (Fe-N-C) materials have been suggested as the most promising replacement for Pt-based catalysts in the oxygen reduction reaction (ORR) owing to the FeN<inf>4</inf> active moiety. Based on the relationship between the oxygen binding energy and the catalytic activity, Fe-N-C has a very strong oxygen binding energy; hence, hard to desorb the final reaction intermediate of *OH. Herein, we provide an effective method of tuning the active moiety using a phosphine-gas treatment for Fe-N-C. Combined analyses of experimental and computational results reveal that the conventional FeN<inf>4</inf> moiety is transformed into FeN<inf>3</inf>PO through the P-doping post-treatment. Furthermore, we propose an ORR mechanism on the unique FeN<inf>3</inf>PO moiety based on a microkinetic model, in which *OH intermediates are considered. Compared to the FeN<inf>4</inf> moiety, the FeN<inf>3</inf>PO moiety facilitates *OH desorption, thereby enhancing the ORR activity in both alkaline and acidic electrolytes. The effects of P-doping on the ORR performance are also validated in both anion exchange membrane fuel cells (AEMFCs) and proton exchange membrane fuel cells (PEMFCs). © 2023 American Chemical Society.",active moiety; atomic modulation; Fe−N−C; oxygen reduction reaction; phosphorus doping,Binding energy; Catalyst activity; Doping (additives); Electrocatalysts; Electrolytic reduction; Oxygen; Phosphorus; Phosphorus compounds; Proton exchange membrane fuel cells (PEMFC); Reaction intermediates; Active moiety; Atomic modulation; Fe−N−C; Iron-doped; Nitrogen-doped carbons; Oxygen binding; Oxygen reduction reaction; P-doping; Phosphorus doping; Phosphorus-doped; Iron compounds,active moiety;atomic modulation;Fe−N−C;oxygen reduction reaction;phosphorus doping;Binding energy;Catalyst activity;Doping (additives);Electrocatalysts;Electrolytic reduction;Oxygen;Phosphorus;Phosphorus compounds;Proton exchange membrane fuel cells (PEMFC);Reaction intermediates;Iron-doped;Nitrogen-doped carbons;Oxygen binding;P-doping;Phosphorus-doped;Iron compounds,"J.W. Han; Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, South Korea; email: jwhan@postech.ac.kr; E. Cho; Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 291 Daehak-ro, 34141, South Korea; email: eacho@kaist.ac.kr",,,,,,American Chemical Society,21555435,,ACCAC,,English,ACS Catal.,Article,Scopus,,2-s2.0-85164973568,,South Korea,postech.ac.kr,,,"Roh, J.; Cho, A.; Kim, S.; Lee, K.-S.; Shin, J.; Choi, J.S.; Bak, J.; Lee, S.; Song, D.; Kim, E.-J.; Lee, C.; Uhm, Y.R.; Cho, Y.-H.; Han, J.W.; Cho, E."
"Wang, R.G., Guo, J.X., Li, J.S., Wang, Q.L., Lv, Z., Gong, C.R., Pan, C.F., Ling, T.",Transforming Single-Atom Site to Dual-Atom Site in Fe-N-C Catalysts: A Universal Strategy for Enhancing Durability in Proton-Exchange Membrane Fuel Cells,2025,ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,64,34,e202510671,,,8,8,10.1002/anie.202510671,,"[Wang, Ruguang; Guo, Jiaxin; Li, Jisi; Wang, Quanlu; Lv, Zheng; Gong, Cairong; Ling, Tao] Tianjin Univ, Sch Mat Sci & Engn, Tianjin Key Lab Composite & Funct Mat, Key Lab Adv Ceram & Machining Technol,Minist Educ, Tianjin 300072, Peoples R China; [Guo, Jiaxin; Pan, Caofeng] Beihang Univ, Inst Atom Mfg, Beijing 100191, Peoples R China",,"Fe-N-C catalyst is the most promising non-noble metal oxygen reduction catalyst for proton-exchange membrane fuel cells (PEMFCs); however, their practical applications are still limited by unsatisfactory long-term stability. This is because the N atoms of the active FeN4 moiety are easy to protonate, leading to the leaching of Fe atoms, and the H2O2 generated during oxygen reduction reaction (ORR) process triggers the Fenton reaction, further accelerating the dissolution of Fe. To address these critical stability challenge, we developed a general strategy to transform FeN4 single-atom sites to Fe2N6 dual-atom sites in Fe-N-C catalysts with various carbon substrates. This is achieved by treating the presynthesized Fe-N-C catalysts in a H-2/Ar atmosphere to break the C & horbar;N bonds near the FeN4 sites while introducing Fe and N precursors to form the Fe2N6 sites. Our theoretical calculations and experimental results demonstrate that the newly formed Fe2N6 sites are structurally more stable in acidic ORR and produce negligible H2O2 (<1%). Therefore, the transformed Fe-N-C catalyst exhibits an extremely low Fe demetalation ratio (0.61 at%) in 0.1 M HClO4 after 80k cycling. More surprisingly, the transformed Fe-N-C catalyst can effectively decompose H2O2 with a high decomposition rate of 15.7 mmol min(-1), approaching that of the state-of-the art Pt/C catalyst (17 mmol min(-1)). As a result, the transformed Fe-N-C catalyst assembled PEMFC operates stably for 300 h with only 7% current density attenuation, whereas that of the pristine Fe-N-C catalyst-based device declines by 84% within 100 h.",Acidic oxygen reduction reaction; Coordination configuration; Metal demetallization; Platinum-free catalysts; Proton-exchange membrane fuel cells,OXYGEN REDUCTION; X SITES; IRON; ELECTROCATALYSTS; EFFICIENT; DENSITY; NANOPARTICLES; CARBON,Acidic oxygen reduction reaction;Coordination configuration;Metal demetallization;Platinum-free catalysts;Proton-exchange membrane fuel cells;OXYGEN REDUCTION;X SITES;IRON;ELECTROCATALYSTS;EFFICIENT;DENSITY;NANOPARTICLES;CARBON,gcr@tju.edu.cn; pancaofeng@buaa.edu.cn; lingt04@tju.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,,,,40542742,English,ANGEW CHEM INT EDIT,Article,WoS,Chemistry,WOS:001519172300001,2-s2.0-105009406251,China,tju.edu.cn,Tianjin Univ;Beihang Univ,"Tianjin Univ, China;Beihang Univ, China","Wang, Ruguang; Guo, Jiaxin; Li, Jisi; Wang, Quanlu; Lv, Zheng; Gong, Cairong; Pan, Caofeng; Ling, Tao"
"He, C.Y., Tao, J.Z.",Transition metal carbides coupled with nitrogen-doped carbon as efficient and stable Bi-functional catalysts for oxygen reduction reaction and hydrogen evolution reaction,2022,INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,47,27,,13240,13250,11,45,10.1016/j.ijhydene.2022.02.082,,"[He, Chunyong; Tao, Juzhou] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China; [He, Chunyong; Tao, Juzhou] Spallat Neutron Source Sci Ctr, Dongguan 523803, Peoples R China; [He, Chunyong; Tao, Juzhou] Univ Chinese Acad Sci, Beijing 100049, Peoples R China",,"Developing non-precious metal catalysts for oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) is crucial for proton exchange membrane fuel cell (PEMFC), metal-air batteries and water splitting. Here, we report a in-situ simple approach to synthesize ultra small sized transition metal carbides (TMCs) nanoparticles coupled with nitrogen-doped carbon hybrids (TMCs/NC, including WC/NC, V8C7/NC and Mo2C/NC). The TMCs/NC exhibit excellent ORR and HER performances in acidic electrolyte as bi-functional catalysts. The potential of WC/NC at the current density of 3.0 mA cm(-2) for ORR is 0.814 V (vs. reversible hydrogen electrode (RHE)), which is very close to Pt/C (0.827 V), making it one of the best TMCs based ORR catalysts in acidic electrolyte. Besides, the TMCs/NC exhibit excellent performances toward HER, the Mo2C/NC only need an overpotential of 80 mV to drive the current density of 10 mA cm(-2), which is very close to Pt/C (37 mV), making it the competitive alternative candidate among the reported non-precious metal HER catalysts.(c) 2022 Hydrogen Energy Publications LLC.",Bi-functional catalysts; Transition metal carbides; Oxygen reduction reaction; Hydrogen evolution reaction,HIGH-SURFACE-AREA; TUNGSTEN CARBIDE; MOLYBDENUM CARBIDE; MO2C NANOPARTICLES; ELECTROCATALYSTS; PERFORMANCE; COMPOSITES; COBALT; NANOSTRUCTURES; PHOSPHIDES,Bi-functional catalysts;Transition metal carbides;Oxygen reduction reaction;Hydrogen evolution reaction;HIGH-SURFACE-AREA;TUNGSTEN CARBIDE;MOLYBDENUM CARBIDE;MO2C NANOPARTICLES;ELECTROCATALYSTS;PERFORMANCE;COMPOSITES;COBALT;NANOSTRUCTURES;PHOSPHIDES,hechunyong@ihep.ac.cn,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0360-3199,,,,English,INT J HYDROGEN ENERG,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels,WOS:000788057700004,2-s2.0-85125659442,China,ihep.ac.cn,Chinese Acad Sci;Spallat Neutron Source Sci Ctr;Univ Chinese Acad Sci,"Chinese Acad Sci, China;Spallat Neutron Source Sci Ctr, China;Univ Chinese Acad Sci, China","He, Chunyong; Tao, Juzhou"
"Akula, S., Mooste, M., Kozlova, J., Kaarik, M., Treshchalov, A., Kikas, A., Kisand, V., Aruvali, J., Paiste, P., Tamm, A., Leis, J., Tammeveski, K.","Transition metal (Fe, Co, Mn, Cu) containing nitrogen-doped porous carbon as efficient oxygen reduction electrocatalysts for anion exchange membrane fuel cells",2023,Chemical Engineering Journal,458,,141468,,,,89,10.1016/j.cej.2023.141468,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85146670323&doi=10.1016%2Fj.cej.2023.141468&partnerID=40&md5=7070082fb6c52276fb5b8ab7203e5785,"Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Tartu Ülikooli Füüsika Instituut, Tartu, Tartumaa, Estonia; Ökoloogia ja Maateaduste Instituut, Tartu, Tartumaa, Estonia","Akula, Srinu, Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Mooste, Marek, Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Kozlova, Jekaterina, Tartu Ülikooli Füüsika Instituut, Tartu, Tartumaa, Estonia; Käärik, Maike, Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Treshchalov, Aleksei B., Tartu Ülikooli Füüsika Instituut, Tartu, Tartumaa, Estonia; Kikas, Arvo, Tartu Ülikooli Füüsika Instituut, Tartu, Tartumaa, Estonia; Kisand, Vambola, Tartu Ülikooli Füüsika Instituut, Tartu, Tartumaa, Estonia; Aruväli, Jaan, Ökoloogia ja Maateaduste Instituut, Tartu, Tartumaa, Estonia; Paiste, Päärn, Ökoloogia ja Maateaduste Instituut, Tartu, Tartumaa, Estonia; Tamm, Aile, Tartu Ülikooli Füüsika Instituut, Tartu, Tartumaa, Estonia; Leis, Jaan, Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia; Tammeveski, Kaido, Tartu Ülikooli Keemia Instituut, Tartu, Tartumaa, Estonia","Delving into highly active and cost-efficient electrocatalysts for oxygen reduction reaction (ORR) is crucial for the large-scale application of polymer electrolyte fuel cells. Anion exchange membrane fuel cells (AEMFCs) are promising clean energy devices owing to their mild reaction conditions and the high probability of employing Pt-free catalysts for ORR. Developing the promising non-Pt ORR catalysts for AEMFC is still of great importance. Herein, we report the transition metal (Fe, Co, Mn, and Cu) impregnated melamine-phloroglucinol-formaldehyde (MPF) polymeric networks to derive metal-nitrogen-carbon (M–N–C) electrocatalysts via a robust synthesis route. The catalysts are screened through variable metal contents and different pyrolysis temperature optimizations by virtue of their ORR activity. The controlled synthesis method resulted to the prominent textural properties of the catalysts with efficient active centers to enhance the ORR performance. Amongst, iron-doped (MPF/Fe), and cobalt-doped (MPF/Co) catalysts are performing better in terms of half-wave potential (E<inf>1/2</inf>) values of 0.81 and 0.80 V vs RHE which is attributed to the highly active M−N<inf>x</inf> sites and hierarchical porous structure of catalysts. Outstanding electrochemical stability in half-cell and high-power density in an AEMFC (up to 347 mW cm−2) made the present work drive to the development of highly efficient M–N–C catalysts for fuel cell applications. © 2023 Elsevier B.V.",Anion exchange membrane fuel cell; Mesoporous carbon; M−N−C electrocatalyst; Nitrogen doping; Non-precious metal catalyst; Oxygen reduction reaction,Alkaline fuel cells; Carbon; Doping (additives); Electrolysis; Electrolytic reduction; Ion exchange membranes; Ions; Nitrogen; Oxygen; Polyelectrolytes; Porous materials; Proton exchange membrane fuel cells (PEMFC); Transition metals; Anion-exchange membrane fuel cells; Cell-be; Cell/B.E; Cell/BE; Mesoporous carbon; M−N−C electrocatalyst; Nitrogen-doping; Non-precious metal catalysts; Oxygen reduction reaction; ]+ catalyst; Electrocatalysts,Anion exchange membrane fuel cell;Mesoporous carbon;M−N−C electrocatalyst;Nitrogen doping;Non-precious metal catalyst;Oxygen reduction reaction;Alkaline fuel cells;Carbon;Doping (additives);Electrolysis;Electrolytic reduction;Ion exchange membranes;Ions;Nitrogen;Oxygen;Polyelectrolytes;Porous materials;Proton exchange membrane fuel cells (PEMFC);Transition metals;Anion-exchange membrane fuel cells;Cell-be;Cell/B.E;Cell/BE;Nitrogen-doping;Non-precious metal catalysts;]+ catalyst;Electrocatalysts,"S. Akula; Institute of Chemistry, University of Tartu, Tartu, Ravila 14a, 50411, Estonia; email: srinu.akula@ut.ee",,,,,,Elsevier B.V.,13858947,,CMEJA,,English,Chem. Eng. J.,Article,Scopus,,2-s2.0-85146670323,,Estonia,ut.ee,,,"Akula, S.; Mooste, M.; Kozlova, J.; Kaarik, M.; Treshchalov, A.; Kikas, A.; Kisand, V.; Aruvali, J.; Paiste, P.; Tamm, A.; Leis, J.; Tammeveski, K."
"Dombrovskis, J.K., Jeong, H.Y., Fossum, K., Terasaki, O., Palmqvist, A.E.C.",Transition Metal Ion-Chelating Ordered Mesoporous Carbons as Noble Metal-Free Fuel Cell Catalysts,2013,CHEMISTRY OF MATERIALS,25,6,,856,861,6,64,10.1021/cm303357p,,"[Dombrovskis, Johanna K.; Fossum, Kjell; Palmqvist, Anders E. C.] Chalmers Univ Technol, Dept Chem & Biol Engn, SE-41296 Gothenburg, Sweden; [Jeong, Hu Y.] UNIST, UCRF, Ulsan 689798, South Korea; [Jeong, Hu Y.] UNIST, Sch Mech & Adv Mat Engn, Ulsan 689798, South Korea; [Terasaki, Osamu] Korea Adv Inst Sci & Technol, WCU Project, Grad Sch EEWS, Taejon 305701, South Korea",,"A new concept for noble metal-free polymer electrolyte membrane fuel cell catalysts has been developed. The catalysts consist of chelated transition metal ions incorporated in a nitrogen-functionalized ordered mesoporous carbon matrix, which is evidenced by a combination of X-ray absorption fine structure analysis and high-resolution transmission electron microscopy. The ordered mesoporous carbon matrix of the catalyst offers an exceptionally high specific surface area and allows conceptually for a high degree of tuning, enabling controlled variability of, e.g., pore size and curvature and thickness of the pore walls of the catalysts. Single cell fuel cell tests of membrane electrode assemblies prepared with a cathode made of iron- or cobalt-based versions of the catalyst show high power densities, reaching up to one-third of a commercial Pt/C catalyst at 0.6 V.",fuel cell; transition metals; mesoporous materials; EXAFS spectroscopy; electrocatalysis,OXYGEN-REDUCTION REACTION; FE/N/C-CATALYSTS; HEAT-TREATMENT; O-2 REDUCTION; ELECTROCATALYSTS; IRON; PORPHYRIN; DENSITY; ARRAYS; ORR,fuel cell;transition metals;mesoporous materials;EXAFS spectroscopy;electrocatalysis;OXYGEN-REDUCTION REACTION;FE/N/C-CATALYSTS;HEAT-TREATMENT;O-2 REDUCTION;ELECTROCATALYSTS;IRON;PORPHYRIN;DENSITY;ARRAYS;ORR,anders.palmqvist@chalmers.se,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,0897-4756,,,,English,CHEM MATER,Article,WoS,Chemistry; Materials Science,WOS:000316847100007,,Sweden;South Korea,chalmers.se,Chalmers Univ Technol;UNIST;Korea Adv Inst Sci & Technol,"Chalmers Univ Technol, Sweden;UNIST, South Korea;Korea Adv Inst Sci & Technol, South Korea","Dombrovskis, Johanna K.; Jeong, Hu Y.; Fossum, Kjell; Terasaki, Osamu; Palmqvist, Anders E. C."
"Zhang, C., Zhang, W., Zheng, W.T.",Transition Metal-Nitrogen-Carbon Active Site for Oxygen Reduction Electrocatalysis: Beyond the Fascinations of TM-N4,2019,CHEMCATCHEM,11,2,,655,668,14,35,10.1002/cctc.201801679,,"[Zhang, Cai; Zhang, Wei; Zheng, Weitao] Jilin Univ, State Key Lab Automot Simulat & Control, Changchun 130012, Jilin, Peoples R China; [Zhang, Cai; Zhang, Wei; Zheng, Weitao] Jilin Univ, Sch Mat Sci & Engn, Changchun 130012, Jilin, Peoples R China; [Zhang, Cai; Zhang, Wei; Zheng, Weitao] Jilin Univ, Electron Microscopy Ctr, Changchun 130012, Jilin, Peoples R China; [Zhang, Cai; Zhang, Wei; Zheng, Weitao] Jilin Univ, Int Ctr Future Sci, Changchun 130012, Jilin, Peoples R China; [Zhang, Wei] CIC Energigune, Albert Einstein 48, Minano 01510, Spain; [Zhang, Wei] Basque Fdn Sci, Ikerbasque, Bilbao 48013, Spain",,"Low cost transition metal-nitrogen-carbon (TM-N-C) catalysts hold excellent electrocatalytic activity and stability for oxygen reduction reaction (ORR), and have been considered as the most promising alternative to commercial Pt/C. TM-N-4, once identified as one potential active site for ORR, are brought to the spotlight by several single atom TM-N-C catalysts recently. However, it remains ambiguous whether this active site exists and is active for ORR because of the controversial analysis about similar TM-N-C catalysts by different groups. Herein, we elucidated the origin, architecture, characterization methods and possible catalytic mechanism of TM-N-4 active site. Some recent cases about single atom TM-N-C catalysts with TM-N-4 active site were comprehensively reviewed. Thus, some derived perspectives were presented. Undoubtedly, TM-N-4 enables being qualified as one possible type of active site for ORR. However, a general acceptance may mislead for clarifying, as confirmation of the metal-centered coordination environment requires for more advanced technologies and strategies.",Metal-nitrogen-carbon; active site; TM-N-4; oxygen reduction reaction; single atom catalyst,PEM FUEL-CELLS; HIGH-PERFORMANCE ELECTROCATALYSTS; SINGLE-ATOM CATALYSTS; DOPED CARBON; RECENT PROGRESS; POROUS CARBON; FE-N/C; ELECTROCHEMICAL REDUCTION; PORPHYRIN CATALYSTS; FE/N/C-CATALYSTS,Metal-nitrogen-carbon;active site;TM-N-4;oxygen reduction reaction;single atom catalyst;PEM FUEL-CELLS;HIGH-PERFORMANCE ELECTROCATALYSTS;SINGLE-ATOM CATALYSTS;DOPED CARBON;RECENT PROGRESS;POROUS CARBON;FE-N/C;ELECTROCHEMICAL REDUCTION;PORPHYRIN CATALYSTS;FE/N/C-CATALYSTS,weizhang@jlu.edu.cn; wtzheng@jlu.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1867-3880,,,,English,CHEMCATCHEM,Review,WoS,Chemistry,WOS:000459734900002,,China;Spain,jlu.edu.cn,Jilin Univ;CIC Energigune;Basque Fdn Sci,"Jilin Univ, China;CIC Energigune, Spain;Basque Fdn Sci, Spain","Zhang, Cai; Zhang, Wei; Zheng, Weitao"
"Wang, N., Gan, S., Mao, Y., Xiao, J., Xu, C., Zhou, T.",Transition metals anchored on nitrogen-doped graphdiyne for an efficient oxygen reduction reaction: a DFT study,2023,Physical Chemistry Chemical Physics,26,3,,2449,2456,,5,10.1039/d3cp03971d,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85181815525&doi=10.1039%2Fd3cp03971d&partnerID=40&md5=dd800861038f79b3a51852058684fd77,"School of Sciences, Xihua University, Chengdu, Sichuan, China; School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, Shanghai, China; College of Physics and Electronic Information, Baicheng Normal University, Baicheng, Jilin, China; College of Carbon Neutrality Future Technology, China University of Petroleum-Beijing, Beijing, China; State Key Laboratory of Heavy Oil Processing, Beijing, China","Wang, Ning, School of Sciences, Xihua University, Chengdu, Sichuan, China; Gan, Siyu, School of Sciences, Xihua University, Chengdu, Sichuan, China; Mao, Yunfeng, School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, Shanghai, China; Xiao, Junping, College of Physics and Electronic Information, Baicheng Normal University, Baicheng, Jilin, China; Xu, Chunming, College of Carbon Neutrality Future Technology, China University of Petroleum-Beijing, Beijing, China, State Key Laboratory of Heavy Oil Processing, Beijing, China; Zhou, Tianhang, College of Carbon Neutrality Future Technology, China University of Petroleum-Beijing, Beijing, China, State Key Laboratory of Heavy Oil Processing, Beijing, China","The search for highly active and low-cost single-atom catalysts for the oxygen reduction reaction (ORR) is essential for the widespread application of proton exchange membrane fuel cells. Transition metals anchored on nitrogen-doped graphdiyne (GDY) have attracted considerable interest as potentially excellent catalysts for the ORR. However, the relationship between the active site and nitrogen-doped GDY remains unclear. In this work, we conducted a systematic investigation of sp-hybridized N atoms anchoring single transition metal atoms of 3d and 4d on GDY (TMC<inf>2</inf>N<inf>2</inf>) as electrocatalysts for the ORR. Firstly, 18 kinds of TMC<inf>2</inf>N<inf>2</inf> were determined to have good thermodynamic stability. Due to the extremely strong adsorption of *OH, TMC<inf>2</inf>N<inf>2</inf> exhibits inferior ORR performance compared to traditional Pt(111). Considering that *OH adsorption hinders the catalytic activity of TMC<inf>2</inf>N<inf>2</inf>, we modified the OH ligand of TMC<inf>2</inf>N<inf>2</inf> to develop the high-valent metal complex (TMC<inf>2</inf>N<inf>2</inf>-OH) aiming to enhance the electrocatalytic activity. The adsorption of intermediates on most TMC<inf>2</inf>N<inf>2</inf>-OH is weakened after the modification of the OH ligand, especially for the adsorption of *OH. Thus, by comparing the ORR overpotential of catalysts before and after ligand modification, we find that the catalytic activity of different TMC<inf>2</inf>N<inf>2</inf>-OHs improves to various degrees. MnC<inf>2</inf>N<inf>2</inf>-OH, TMC<inf>2</inf>N<inf>2</inf>-OH, and TcC<inf>2</inf>N<inf>2</inf>-OH exhibit relatively high ORR catalytic activity, with overpotentials of 0.93 V, 1.19 V, and 0.92 V, respectively. Furthermore, we investigated the cause of improved catalytic activity of TMC<inf>2</inf>N<inf>2</inf>-OH and found that the modified coordination environment of the catalyst led to adjusted adsorption of ORR intermediates. In summary, our work sheds light on the relationship between nitrogen-doped GDY and transition metal sites, thus contributing to the development of more efficient catalysts. © 2024 The Royal Society of Chemistry.",,Adsorption; Atoms; Doping (additives); Electrocatalysts; Electrolytic reduction; Ligands; Metal complexes; Nitrogen; Oxygen; Proton exchange membrane fuel cells (PEMFC); Transition metals; Active costs; DFT study; Graphdiyne; Low-costs; Nitrogen-doped; Overpotential; Oxygen reduction reaction; Proton-exchange membranes fuel cells; Single-atoms; ]+ catalyst; Catalyst activity; fuel; metal complex; nitrogen; oxygen; proton; transition element; adsorption; article; catalysis; catalyst; controlled study; membrane; thermodynamics,Adsorption;Atoms;Doping (additives);Electrocatalysts;Electrolytic reduction;Ligands;Metal complexes;Nitrogen;Oxygen;Proton exchange membrane fuel cells (PEMFC);Transition metals;Active costs;DFT study;Graphdiyne;Low-costs;Nitrogen-doped;Overpotential;Oxygen reduction reaction;Proton-exchange membranes fuel cells;Single-atoms;]+ catalyst;Catalyst activity;fuel;metal complex;proton;transition element;article;catalysis;catalyst;controlled study;membrane;thermodynamics,"J. Xiao; College of Physics and Electronic Information, Baicheng Normal University, Baicheng, Jilin, 137000, China; email: djtc999@163.com; T. Zhou; College of Carbon Neutrality Future Technology, China University of Petroleum (Beijing), Beijing, 102249, China; email: zhouth@cup.edu.cn",,,,,,Royal Society of Chemistry,14639076,,PPCPF,38168706,English,Phys. Chem. Chem. Phys.,Article,Scopus,,2-s2.0-85181815525,,China,163.com,,,"Wang, N.; Gan, S.; Mao, Y.; Xiao, J.; Xu, C.; Zhou, T."
"Park, S.H., Park, D.H., Byeon, J.H., Kim, M.H., Gu, Y., Lim, D.M., Kim, J.H., Jang, J.S., Hong, C.E., Seo, D.G., Han, J.I., Park, K.W.",Tri-doped mesoporous carbon nanostructures prepared via template method for enhanced oxygen reduction reaction,2024,Carbon,218,,118666,,,,6,10.1016/j.carbon.2023.118666,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85178662792&doi=10.1016%2Fj.carbon.2023.118666&partnerID=40&md5=890927c218d1ee25a3112dac905efe75,"Department of Chemical Engineering, Soongsil University, Seoul, South Korea","Park, Seon-ha, Department of Chemical Engineering, Soongsil University, Seoul, South Korea; Park, Deokhye, Department of Chemical Engineering, Soongsil University, Seoul, South Korea; Byeon, Jeong-hyeon, Department of Chemical Engineering, Soongsil University, Seoul, South Korea; Kim, Min-ha, Department of Chemical Engineering, Soongsil University, Seoul, South Korea; Gu, Yoonhi, Department of Chemical Engineering, Soongsil University, Seoul, South Korea; Lim, Da-mi, Department of Chemical Engineering, Soongsil University, Seoul, South Korea; Kim, Jihwan, Department of Chemical Engineering, Soongsil University, Seoul, South Korea; Jang, Jaesung, Department of Chemical Engineering, Soongsil University, Seoul, South Korea; Hong, Chaneui, Department of Chemical Engineering, Soongsil University, Seoul, South Korea; Seo, Dong-geon, Department of Chemical Engineering, Soongsil University, Seoul, South Korea; Han, Jaeik, Department of Chemical Engineering, Soongsil University, Seoul, South Korea; Park, Kyung-won, Department of Chemical Engineering, Soongsil University, Seoul, South Korea","Doped carbon structures have been developed as non-precious metal catalysts for oxygen reduction reactions (ORR) in polymer electrolyte membrane fuel cells (PEMFCs). Among doped carbon structures, Fe- and N-doped carbon (Fe/N/C) nanostructured catalysts have received attention due to their catalytic activity, comparable to that of Pt, avoiding the use of critical raw materials. However, obviously, its durability is not yet neither fully understood nor comparable to that of traditional catalysts. In this study, we synthesized mesoporous F-doped Fe/N/C, which is a tri-doped carbon nanostructure, as a cathode catalyst for ORR. Tri-doped carbon catalysts with different amounts (x) of F (Fx-Fe/N/C) were prepared using Fe-5,10,15,20-tetrakis(4-methoxyphenyl)-21H,23H-porphine iron(III) chloride and NH<inf>4</inf>F as the Fe/N- and F- doping sources, respectively, and Santa Barbara amorphous-15 as the template. Fx-Fe/N/C with an optimal F content exhibited excellent electrocatalytic performance for ORRs i.e. a high half-wave potential of 809 mV in 0.1 M HClO<inf>4</inf> solution, a maximum power density of 280 mW cm−2, and a high stability for 4000 min at 0.5 V, owing to the high proportion of FeN<inf>x</inf> and pyridinic N as active sites, strong C–F bonds, and hydrophobic surfaces. © 2023 Elsevier Ltd",Fe/N/C; Fluorine doped carbon; Non-precious metal catalysts; PEMFC; Water flooding,Carbon; Catalyst activity; Chlorine compounds; Doping (additives); Electrolytic reduction; Floods; Fluorine; Hydrophobicity; Iron compounds; Nanocatalysts; Nanostructures; Nitrogen; Oxygen; Polyelectrolytes; Precious metals; Surface chemistry; Doped carbons; Fe- and N-doped carbon; Fe-doped; Floodings; Fluorine doped carbon; Fluorine-doped; N-doped; Non-precious metal catalysts; Water flooding; Proton exchange membrane fuel cells (PEMFC),Fe/N/C;Fluorine doped carbon;Non-precious metal catalysts;PEMFC;Water flooding;Carbon;Catalyst activity;Chlorine compounds;Doping (additives);Electrolytic reduction;Floods;Fluorine;Hydrophobicity;Iron compounds;Nanocatalysts;Nanostructures;Nitrogen;Oxygen;Polyelectrolytes;Precious metals;Surface chemistry;Doped carbons;Fe- and N-doped carbon;Fe-doped;Floodings;Fluorine-doped;N-doped;Proton exchange membrane fuel cells (PEMFC),"K.-W. Park; Department of Chemical Engineering, Soongsil University, Seoul, 06978, South Korea; email: kwpark@ssu.ac.kr",,,,,,Elsevier Ltd,00086223,,CRBNA,,English,Carbon,Article,Scopus,,2-s2.0-85178662792,,South Korea,ssu.ac.kr,,,"Park, S.-H.; Park, D.-H.; Byeon, J.-H.; Kim, M.-H.; Gu, Y.; Lim, D.-M.; Kim, J.-H.; Jang, J.-S.; Hong, C.-E.; Seo, D.-G.; Han, J.-I.; Park, K.-W."
"Gao, C., Li, L., Yan, X., Zhang, N., Bao, J., Zhang, X., Li, Y.",Triethylenediamine cobalt complex encapsulated in a metal–organic framework cage to prepare a cobalt single-atom catalyst with a high Co-N4 density for an efficient oxygen reduction reaction,2024,Journal of Colloid and Interface Science,653,,,296,307,,18,10.1016/j.jcis.2023.09.027,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85171479019&doi=10.1016%2Fj.jcis.2023.09.027&partnerID=40&md5=eaec41f3c7332817ede112bf1750026c,"State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, China; School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, China; School of Materials Science and Engineering, North China University of Water Resources and Electric Power, Zhengzhou, Henan, China","Gao, Cheng, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, China, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, China; Li, Longzhu, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, China, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, China; Yan, Xiaoming, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, China, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, China; Zhang, Ning, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, China, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, China; Bao, Junjiang, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, China, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, China; Zhang, Xiaopeng, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, China, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, China; Li, Yanqiang, School of Materials Science and Engineering, North China University of Water Resources and Electric Power, Zhengzhou, Henan, China","Transition metal single atom catalysts (TM SACs) are the most promising oxygen reduction reaction (ORR) catalysts for proton exchange membrane fuel cells (PEMFCs) and metal-air batteries. However, the low density of M-N<inf>x</inf> active sites seriously hinders further improvement of the ORR electrocatalytic activity. Here, a strategy for encapsulating nitrogen-rich guest molecules (triethylenediamine cobalt complex, [Co(en)<inf>3</inf>]3+) was proposed to construct a high-performance cobalt single-atom catalyst (Co-encapsulated SAC/NC). With this strategy, the guest molecules are encapsulated into metal–organic framework (MOF) cages as an additional cobalt source to boost cobalt loading, while abundant nitrogen from guest molecules contributes to the formation of Co-N<inf>4</inf> active sites. Remarkably, the resulting Co-encapsulated SAC/NC has a high cobalt loading amount of 4.03 wt%, and spherical aberration-corrected transmission electron microscopy (AC-TEM) has confirmed that most cobalt exists in a single-atom state. As a result, the Co-encapsulated SAC/NC exhibits excellent ORR catalytic performance with a half-wave potential of 0.88 V. Furthermore, Zn-air batteries employing Co-encapsulated SAC/NC as air cathode show high peak power density and excellent cycling stability. Density functional theory (DFT) calculations reveal that adjacent active sites have different rate-determining steps and lower reaction energy barriers than a single active site. © 2023 Elsevier Inc.",Cobalt single atom; Metal-organic frameworks; Oxygen reduction reaction; Zn-air batteries,"Aberrations; Atoms; Catalysts; Cobalt compounds; Density functional theory; Electrolytic reduction; Molecules; Nitrogen; Organometallics; Oxygen; Proton exchange membrane fuel cells (PEMFC); Transition metals; Zinc air batteries; Zinc compounds; Active site; Cobalt complexes; Cobalt complexes (III); Cobalt single atom; Guest molecules; Metalorganic frameworks (MOFs); Oxygen reduction reaction; Single-atoms; Triethylenediamine; ]+ catalyst; High resolution transmission electron microscopy; 1,4 diazabicyclo[2.2.2]octane; cobalt; cobalt complex; electrolyte; metal organic framework; nitrogen; oxygen; zinc; adsorption; air; Article; atmosphere; atom; Brunauer Emmett Teller method; catalysis; catalyst; crystal structure; cyclic voltammetry; density functional theory; desorption; diffusion coefficient; electron transport; encapsulation; extended X ray absorption fine structure spectroscopy; linear sweep voltammetry; molecule; oxidation reduction reaction; pore size; synthesis; transmission electron microscopy; X ray diffraction; X ray photoemission spectroscopy","Cobalt single atom;Metal-organic frameworks;Oxygen reduction reaction;Zn-air batteries;Aberrations;Atoms;Catalysts;Cobalt compounds;Density functional theory;Electrolytic reduction;Molecules;Nitrogen;Organometallics;Oxygen;Proton exchange membrane fuel cells (PEMFC);Transition metals;Zinc air batteries;Zinc compounds;Active site;Cobalt complexes;Cobalt complexes (III);Guest molecules;Metalorganic frameworks (MOFs);Single-atoms;Triethylenediamine;]+ catalyst;High resolution transmission electron microscopy;1,4 diazabicyclo[2.2.2]octane;cobalt;cobalt complex;electrolyte;metal organic framework;zinc;adsorption;air;Article;atmosphere;atom;Brunauer Emmett Teller method;catalysis;catalyst;crystal structure;cyclic voltammetry;desorption;diffusion coefficient;electron transport;encapsulation;extended X ray absorption fine structure spectroscopy;linear sweep voltammetry;molecule;oxidation reduction reaction;pore size;synthesis;transmission electron microscopy;X ray diffraction;X ray photoemission spectroscopy",,,,,,,Academic Press Inc.,00219797,,JCISA,37717430,English,J. Colloid Interface Sci.,Article,Scopus,,2-s2.0-85171479019,,China,No email,,,"Gao, C.; Li, L.; Yan, X.; Zhang, N.; Bao, J.; Zhang, X.; Li, Y."
"Hu, C., Kang, N.Y., Kang, H.W., Lee, J.Y., Zhang, X., Lee, Y.J., Jung, S.W., Park, J.H., Kim, M.G., Yoo, S.J., Lee, S.Y., Park, C.H., Lee, Y.M.",Triptycene Branched Poly(aryl-co-aryl piperidinium) Electrolytes for Alkaline Anion Exchange Membrane Fuel Cells and Water Electrolyzers,2024,Angewandte Chemie - International Edition,63,3,e202316697,,,,97,10.1002/anie.202316697,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85179678432&doi=10.1002%2Fanie.202316697&partnerID=40&md5=e93545c5a4f328c20a0203fde598824d,"Department of Energy Engineering, Hanyang University, Seoul, South Korea; Department of Energy Engineering, Gyeongsang National University, Jinju, Gyeongsangnam-do, South Korea; Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul, South Korea; Division of Energy & Environment Technology, University of Science and Technology (UST), Daejeon, South Korea; Kyung Hee University, Seoul, South Korea","Hu, Chuan, Department of Energy Engineering, Hanyang University, Seoul, South Korea; Kang, Nayoon, Department of Energy Engineering, Hanyang University, Seoul, South Korea; Kang, Hyun-woo, Department of Energy Engineering, Gyeongsang National University, Jinju, Gyeongsangnam-do, South Korea; Lee, Ju-yeon, Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul, South Korea; Zhang, Xiaohua, Department of Energy Engineering, Hanyang University, Seoul, South Korea; Lee, Young-jun, Department of Energy Engineering, Hanyang University, Seoul, South Korea; Jung, Seung-won, Department of Energy Engineering, Hanyang University, Seoul, South Korea; Park, Jong-hyeong, Department of Energy Engineering, Hanyang University, Seoul, South Korea; Kim, Myeong-geun, Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul, South Korea; Yoo, Sung Jong, Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul, South Korea, Division of Energy & Environment Technology, University of Science and Technology (UST), Daejeon, South Korea, Kyung Hee University, Seoul, South Korea; Lee, So-young, Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul, South Korea; Park, Chi Hoon, Department of Energy Engineering, Gyeongsang National University, Jinju, Gyeongsangnam-do, South Korea; Lee, Young Moo, Department of Energy Engineering, Hanyang University, Seoul, South Korea","Alkaline polymer electrolytes (APEs) are essential materials for alkaline energy conversion devices such as anion exchange membrane fuel cells (AEMFCs) and water electrolyzers (AEMWEs). Here, we report a series of branched poly(aryl-co-aryl piperidinium) with different branching agents (triptycene: highly-rigid, three-dimensional structure; triphenylbenzene: planar, two-dimensional structure) for high-performance APEs. Among them, triptycene branched APEs showed excellent hydroxide conductivity (193.5 mS cm−1@80 °C), alkaline stability, mechanical properties, and dimensional stability due to the formation of branched network structures, and increased free volume. AEMFCs based on triptycene-branched APEs reached promising peak power densities of 2.503 and 1.705 W cm−2 at 75/100 % and 30/30 % (anode/cathode) relative humidity, respectively. In addition, the fuel cells can run stably at a current density of 0.6 A cm−2 for 500 h with a low voltage decay rate of 46 μV h−1. Importantly, the related AEMWE achieved unprecedented current densities of 16 A cm−2 and 14.17 A cm−2 (@2 V, 80 °C, 1 M NaOH) using precious and non-precious metal catalysts, respectively. Moreover, the AEMWE can be stably operated under 1.5 A cm−2 at 60 °C for 2000 h. The excellent results suggest that the triptycene-branched APEs are promising candidates for future AEMFC and AEMWE applications. © 2023 Wiley-VCH GmbH.",Anion Exchange Membrane; Branched Polymer; Fuel Cells; Triptycene; Water Electrolyzers,Alkaline fuel cells; Catalysts; Decay (organic); Electrolytic cells; Ion exchange membranes; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Sodium hydroxide; Alkalines; Anion exchange; Anion exchange membrane; Anion-exchange membrane fuel cells; Branched Polymer; Electrolyzers; Exchange membranes; Polymer electrolyte; Triptycenes; Water electrolyzers; Ions; electrolyte; fuel; hydroxide; polymer; water; anion exchange; anode electrode; article; catalyst; cathode electrode; conductance; controlled study; current density; electric potential; energy conversion; membrane; pharmaceutics,Anion Exchange Membrane;Branched Polymer;Fuel Cells;Triptycene;Water Electrolyzers;Alkaline fuel cells;Catalysts;Decay (organic);Electrolytic cells;Ion exchange membranes;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Sodium hydroxide;Alkalines;Anion exchange;Anion-exchange membrane fuel cells;Electrolyzers;Exchange membranes;Polymer electrolyte;Triptycenes;Ions;electrolyte;fuel;hydroxide;polymer;water;anode electrode;article;catalyst;cathode electrode;conductance;controlled study;current density;electric potential;energy conversion;membrane;pharmaceutics,"Y.M. Lee; Department of Energy Engineering, College of Engineering, Hanyang University, Seoul, 04763, South Korea; email: ymlee@hanyang.ac.kr",,,,,,John Wiley and Sons Inc,14337851,,ACIEF,38063325,English,Angew. Chem. Int. Ed.,Article,Scopus,,2-s2.0-85179678432,,South Korea,hanyang.ac.kr,,,"Hu, C.; Kang, N.Y.; Kang, H.W.; Lee, J.Y.; Zhang, X.; Lee, Y.J.; Jung, S.W.; Park, J.H.; Kim, M.-G.; Yoo, S.J.; Lee, S.Y.; Park, C.H.; Lee, Y.M."
"Yang, H., Chen, X., Chen, W.T., Wang, C., Cuello, N.C., Nafady, A., Al-Enizi, A.M., Waterhouse, G.I.N., Goenaga, G.A., Zawodzinski, T.A., Kruger, P.E., Clements, J.E., Zhang, J., Tian, H., Telfer, S.G., Ma, S.Q.",Tunable Synthesis of Hollow Metal-Nitrogen-Carbon Capsules for Efficient Oxygen Reduction Catalysis in Proton Exchange Membrane Fuel Cells,2019,ACS NANO,13,7,,8087,8098,12,117,10.1021/acsnano.9b02930,,"[Yang, Hui; Zhang, Jian] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China; [Yang, Hui; Ma, Shengqian] Univ S Florida, Dept Chem, 4202 East Fowler Ave, Tampa, FL 33620 USA; [Chen, Xing; Tian, He] Zhejiang Univ, Sch Mat Sci & Engn, Ctr Electron Microscopy, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China; [Chen, Wan-Ting; Wang, Cling; Waterhouse, Geoffrey I. N.] Univ Auckland, MacDiarmid Inst Adv Mat & Nanotechnol, Sch Chem Sci, Auckland 1142, New Zealand; [Cuello, Nelly Cantillo; Goenaga, Gabriel A.; Zawodzinski, Thomas A.] Univ Tennessee, Chem & Biomol Engn Dept, Knoxville, TN 37996 USA; [Nafady, Ayman; Al-Enizi, Abdullah M.; Ma, Shengqian] King Saud Univ, Dept Chem, Coll Sci, Riyadh 11451, Saudi Arabia; [Kruger, Paul E.] Univ Canterbury, MacDiarmid Inst Adv Mat & Nanotechnol, Sch Phys & Chem Sci, Christchurch 8140, New Zealand; [Clements, John E.; Telfer, Shane G.] Massey Univ, MacDiarmid Inst Adv Mat & Nanotechnol, Inst Fundamental Sci, Palmerston North 4442, New Zealand",,"Atomically dispersed metal catalysts anchored on nitrogen doped (N-doped) carbons demand attention due to their superior catalytic activity relative to that of metal nanoparticle catalysts in energy storage and conversion processes. Herein, we introduce a simple and versatile strategy for the synthesis of hollow N-doped carbon capsules that contain one or more atomically dispersed metals (denoted as H-M-N-x-C and H-M-mix-N-x-C, respectively, where M = Fe, Co, or Ni). This method utilizes the pyrolysis of nanostructured core-shell precursors produced by coating a zeolitic imidazolate framework core with a metal tannic acid (M TA) coordination polymer shell (containing up to three different metal cations). Pyrolysis of these core shell precursors affords hollow N-doped carbon capsules containing monometal sites (e.g., Fe-N-x, CoNx, or Ni-N-x) or multimetal sites (Fe/Co-N-x, Fe/Ni-N-x, Co/Ni-N-x, or Fe/Co/Ni-N-x). This inventory allowed exploration of the relationship between catalyst composition and electrochemical activity for the oxygen reduction reaction (ORR) in acidic solution. H-Fe-N-x-C, H-Co-N-x-C, H-Fe-Co-N-x-C, H-FeNi-N-x-C, and H-FeCoNi-N-x-C were particularly efficient ORR catalysts in acidic solution. Furthermore, the H-Fe-N-x-C catalyst exhibited outstanding initial performance when applied as a cathode material in a proton exchange membrane fuel cell. The synthetic methodology introduced here thus provides a convenient route for developing next generation catalysts based on earth-abundant components.",metal-organic framework; metal-nitrogen-carbon; metal single atoms; electrocatalysts; fuel cell,FE-N-C; DOPED CARBON; ORGANIC FRAMEWORK; SURFACE-AREA; ACTIVE-SITES; ACIDIC MEDIA; ELECTROCATALYSTS; IRON; SPHERES; SHELL,metal-organic framework;metal-nitrogen-carbon;metal single atoms;electrocatalysts;fuel cell;FE-N-C;DOPED CARBON;ORGANIC FRAMEWORK;SURFACE-AREA;ACTIVE-SITES;ACIDIC MEDIA;IRON;SPHERES;SHELL,g.waterhouse@auckland.ac.nz; zhj@fjirsm.ac.cn; hetian@zju.edu.cn; s.telfer@massey.ac.nz; sqma@usf.edu,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1936-0851,,,31244037,English,ACS NANO,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science,WOS:000477786400073,2-s2.0-85070486067,China;United States;New Zealand;Saudi Arabia,auckland.ac.nz,Chinese Acad Sci;Univ S Florida;Zhejiang Univ;Univ Auckland;Univ Tennessee;King Saud Univ;Univ Canterbury;Massey Univ,"Chinese Acad Sci, China;Univ S Florida, United States;Zhejiang Univ, China;Univ Auckland, New Zealand;Univ Tennessee, United States;King Saud Univ, Saudi Arabia;Univ Canterbury, New Zealand;Massey Univ, New Zealand","Yang, Hui; Chen, Xing; Chen, Wan-Ting; Wang, Cling; Cuello, Nelly Cantillo; Nafady, Ayman; Al-Enizi, Abdullah M.; Waterhouse, Geoffrey I. N.; Goenaga, Gabriel A.; Zawodzinski, Thomas A.; Kruger, Paul E.; Clements, John E.; Zhang, Jian; Tian, He; Telfer, Shane G.; Ma, Shengqian"
"Zhao, D., Zhang, S., Yin, G., Du, C., Wang, Z., Wei, J.",Tungsten doped Co-Se nanocomposites as an efficient non precious metal catalyst for oxygen reduction,2013,Electrochimica Acta,91,,,179,184,,29,10.1016/j.electacta.2013.01.001,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84872593577&doi=10.1016%2Fj.electacta.2013.01.001&partnerID=40&md5=3d7a380143009de1a16ac4ee75122713,"School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin, Heilongjiang, China; School of Food and Pharmaceutical Engineering, Suihua University, Suihua, Heilongjiang, China","Zhao, Dongjiang, School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin, Heilongjiang, China, School of Food and Pharmaceutical Engineering, Suihua University, Suihua, Heilongjiang, China; Zhang, Sheng, School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin, Heilongjiang, China; Yin, Geping, School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin, Heilongjiang, China; Du, Chunyu, School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin, Heilongjiang, China; Wang, Zhenbo, School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin, Heilongjiang, China; Wei, Jie, School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin, Heilongjiang, China","In this report, powder of tungsten doped Co-Se catalysts have been synthesized by decarbonylation of Co<inf>4</inf>(CO)<inf>12</inf> and W(CO) <inf>6</inf> in 1,6-hexanediol solvent dissolved Se element. Physical and electrochemical characteristics of the prepared samples are evaluated by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and rotating disk electrode (RDE) techniques. These catalysts show surface morphologies agglomerated nanometric particles and present the structural characteristics of orthorhombic CoSe<inf>2</inf> and form tungsten oxide (WO<inf>3</inf>). The catalytic properties of the Co-W-Se catalysts for the oxygen reduction reaction (ORR) change with doping tungsten content in O<inf>2</inf>-saturated 0.5 M H<inf>2</inf>SO<inf>4</inf> electrolyte, and the catalyst contained 1.49 mol% W presents the highest activity with an open circuit potential of 0.81 V. The measured transfer coefficient and Tafel slope of the catalyst is 0.49 and 0.120 V in the potential region of 0.64-0.76 V (vs. SHE), respectively. Therefore, doping W will be a promising approach to improving the ORR activity of non precious metal catalysts. © 2013 Elsevier Ltd. All rights reserved.",Co-W-Se catalyst; Non-precious metal; Oxygen reduction; Polymer electrolyte membrane fuel cells,Catalytic properties; Decarbonylations; Electrochemical characteristics; Nanometric particles; Non-precious metal catalysts; Non-precious metals; Open circuit potential; Orr activities; Oxygen Reduction; Oxygen reduction reaction; Potential region; Rotating disk electrodes; Structural characteristics; Tafel slopes; Transfer coefficient; Tungsten content; Tungsten oxide; Electrolytes; Electrolytic reduction; Photoelectrons; Precious metals; Proton exchange membrane fuel cells (PEMFC); Rotating disks; Scanning electron microscopy; Tungsten; Tungsten compounds; X ray diffraction; X ray photoelectron spectroscopy; Catalysts,Co-W-Se catalyst;Non-precious metal;Oxygen reduction;Polymer electrolyte membrane fuel cells;Catalytic properties;Decarbonylations;Electrochemical characteristics;Nanometric particles;Non-precious metal catalysts;Non-precious metals;Open circuit potential;Orr activities;Oxygen reduction reaction;Potential region;Rotating disk electrodes;Structural characteristics;Tafel slopes;Transfer coefficient;Tungsten content;Tungsten oxide;Electrolytes;Electrolytic reduction;Photoelectrons;Precious metals;Proton exchange membrane fuel cells (PEMFC);Rotating disks;Scanning electron microscopy;Tungsten;Tungsten compounds;X ray diffraction;X ray photoelectron spectroscopy;Catalysts,"G. Yin; State Key Laboratory of Urban Water Resource and Environment, School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China; email: yingeping@hit.edu.cn",,,,,,,00134686,,ELCAA,,English,Electrochim Acta,Article,Scopus,,2-s2.0-84872593577,,China,hit.edu.cn,,,"Zhao, D.; Zhang, S.; Yin, G.; Du, C.; Wang, Z.; Wei, J."
"Wang, R.G., Zhang, L.F., Shan, J.Q., Yang, Y.Y., Lee, F., Chen, T.Y., Mao, J., Zhao, Y., Yang, L.J., Hu, Z.P., Ling, T.",Tuning Fe Spin Moment in Fe-N-C Catalysts to Climb the Activity Volcano via a Local Geometric Distortion Strategy,2022,ADVANCED SCIENCE,9,31,2203917,,,9,66,10.1002/advs.202203917,,"[Wang, Ruguang; Yang, Yuanyuan; Mao, Jing; Zhao, Yang; Yang, Liujing; Ling, Tao] Tianjin Univ, Sch Mat Sci & Engn, Tianjin Key Lab Composite & Funct Mat, Key Lab Adv Ceram & Machining Technol,Minist Educ, Tianjin 300072, Peoples R China; [Zhang, Lifu; Hu, Zhenpeng] Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China; [Shan, Jieqiong] Univ Adelaide, Sch Chem Engn, Adelaide, SA 5005, Australia; [Lee, Jyh-Fu] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan; [Chen, Tsan-Yao] Natl Tsing Hua Univ, Dept Engn & Syst Sci, Hsinchu, Taiwan",,"As the most promising alternative to platinum-based catalysts for cathodic oxygen reduction reaction (ORR) in proton exchange membrane fuel cells, further performance enhancement of Fe-N-C catalysts is highly expected to promote their wide application. In Fe-N-C catalysts, the single Fe atom forms a square-planar configuration with four adjacent N atoms (D-4h symmetry). Breaking the D-4h symmetry of the FeN4 active center provides a new route to boost the activity of Fe-N-C catalysts. Herein, for the first time, the deformation of the square-planar coordination of FeN4 moiety achieved by introducing chalcogen oxygen groups (XO2, X = S, Se, Te) as polar functional groups in the Fe-N-C catalyst is reported. The theoretical and experimental results demonstrate that breaking the D-4h symmetry of FeN4 results in the rearrangement of Fe 3d electrons and increases spin moment of Fe centers. The efficient spin state manipulation optimizes the adsorption energetics of ORR intermediates, thereby significantly promoting the intrinsic ORR activity of Fe-N-C catalysts, among which the SeO2 modified catalyst lies around the peak of the ORR volcano plot. This work provides a new strategy to tune the local coordination and thus the electronic structure of single-atom catalysts.",Fe-N-C catalysts; oxygen reduction reaction; polar functional groups; spin moment; symmetry breaking,SINGLE-ATOM CATALYSTS; HYDROGEN EVOLUTION REACTION; INITIO MOLECULAR-DYNAMICS; OXYGEN REDUCTION REACTION; TOTAL-ENERGY CALCULATIONS; IDENTIFICATION; COORDINATION; SITES; DESCRIPTOR; METALS,Fe-N-C catalysts;oxygen reduction reaction;polar functional groups;spin moment;symmetry breaking;SINGLE-ATOM CATALYSTS;HYDROGEN EVOLUTION REACTION;INITIO MOLECULAR-DYNAMICS;TOTAL-ENERGY CALCULATIONS;IDENTIFICATION;COORDINATION;SITES;DESCRIPTOR;METALS,zphu@nankai.edu.cn; lingt04@tju.edu.cn,,"111 RIVER ST, HOBOKEN 07030-5774, NJ USA",,,,WILEY,,,,36057997,English,ADV SCI,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science,WOS:000849504100001,2-s2.0-85137351017,China;Australia;Taiwan,nankai.edu.cn,Tianjin Univ;Nankai Univ;Univ Adelaide;Natl Synchrotron Radiat Res Ctr;Natl Tsing Hua Univ,"Tianjin Univ, China;Nankai Univ, China;Univ Adelaide, Australia;Natl Synchrotron Radiat Res Ctr, Taiwan;Natl Tsing Hua Univ, Taiwan","Wang, Ruguang; Zhang, Lifu; Shan, Jieqiong; Yang, Yuanyuan; Lee, Jyh-Fu; Chen, Tsan-Yao; Mao, Jing; Zhao, Yang; Yang, Liujing; Hu, Zhenpeng; Ling, Tao"
"Samala, N.R., Grinberg, I.",Tuning of ORR activity through the stabilization of the adsorbates by hydrogen bonding with substituent groups,2020,Physical Chemistry Chemical Physics,22,47,,27811,27817,,13,10.1039/d0cp04478d,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85098157593&doi=10.1039%2Fd0cp04478d&partnerID=40&md5=ab346fa78d87620cf08c61a966dd8311,"Department of Chemistry, Bar-Ilan University, Ramat Gan, Tel Aviv District, Israel","Samala, Nagaprasad Reddy, Department of Chemistry, Bar-Ilan University, Ramat Gan, Tel Aviv District, Israel; Grinberg, Ilya, Department of Chemistry, Bar-Ilan University, Ramat Gan, Tel Aviv District, Israel","Metallocorroles and metalloporphyrins (M-N-C) are some of the best alternative molecular catalysts for the replacement of the expensive platinum-group metals (PGM) in oxygen reduction reaction (ORR) catalysis in polymer electrolyte membrane (PEM) fuel cells. To date, Co-based corroles have shown the best performance, but still suffer from the poor stability and the toxicity of the Co metal. Mn-N-C are more stable than Co-N-C, and are also less reactive towards peroxide formation. In this work, using first-principles density functional theory calculations, we study the improvement of the Mn-based corrole ORR activity by exploiting hydrogen bonding with substituent groups to modify the adsorption energies of the ORR intermediates and obtain higher onset potential (Vonset) values. We found that by using phenyl acetic acid as a substituent, Vonset increased from 0.54 V for the unsubstituted corrole to ∼0.9 V which is competitive with the Vonset of the Co-based corroles. Our results suggest that hydrogen bonding with substituent groups should be considered in the analysis and design of the reactivity of active sites in non-PGM ORR catalysts. © the Owner Societies.",,Calculations; Catalyst activity; Density functional theory; Electrolytic reduction; Hydrogen; Hydrogen bonds; Manganese compounds; Metals; Molecular oxygen; Oxygen reduction reaction; Polyelectrolytes; Adsorption energies; First-principles density functional theory; Metallo-porphyrins; Molecular catalysts; Peroxide formations; Phenylacetic acid; Platinum group metals; Polymer electrolyte membranes; Proton exchange membrane fuel cells (PEMFC),Calculations;Catalyst activity;Density functional theory;Electrolytic reduction;Hydrogen;Hydrogen bonds;Manganese compounds;Metals;Molecular oxygen;Oxygen reduction reaction;Polyelectrolytes;Adsorption energies;First-principles density functional theory;Metallo-porphyrins;Molecular catalysts;Peroxide formations;Phenylacetic acid;Platinum group metals;Polymer electrolyte membranes;Proton exchange membrane fuel cells (PEMFC),"I. Grinberg; Department of Chemistry, Bar-Ilan University, Ramat Gan, 52900, Israel; email: ilya.grinberg@biu.ac.il",,,,,,Royal Society of Chemistry,14639076,,PPCPF,33245314,English,Phys. Chem. Chem. Phys.,Article,Scopus,,2-s2.0-85098157593,,Israel,biu.ac.il,,,"Samala, N.R.; Grinberg, I."
"Zhao, Y., Wang, R., Li, J., Guo, J., Wang, Q., Lv, Z., Yin, P., Ling, T.","Tuning the electronic structure of the Mn-N-C catalyst through XO2 group (X = S, Se, Te) doping for proton-exchange membrane fuel cells",2025,Green Chemistry,27,17,,4540,4550,,2,10.1039/d4gc06444e,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105003670262&doi=10.1039%2Fd4gc06444e&partnerID=40&md5=060acb08a0bea4eef9572eaab06bcab1,"Institute of New-Energy Materials, Tianjin University, Tianjin, China","Zhao, Yang, Institute of New-Energy Materials, Tianjin University, Tianjin, China; Wang, Ruguang, Institute of New-Energy Materials, Tianjin University, Tianjin, China; Li, Jisi, Institute of New-Energy Materials, Tianjin University, Tianjin, China; Guo, Jiaxin, Institute of New-Energy Materials, Tianjin University, Tianjin, China; Wang, Quanlu, Institute of New-Energy Materials, Tianjin University, Tianjin, China; Lv, Zheng, Institute of New-Energy Materials, Tianjin University, Tianjin, China; Yin, Pengfei, Institute of New-Energy Materials, Tianjin University, Tianjin, China; Ling, Tao, Institute of New-Energy Materials, Tianjin University, Tianjin, China","Single-atom catalysts towards the oxygen reduction reaction (ORR) often suffer from unsatisfactory activity and poor stability. Herein, for the first time, we successfully modulated the electronic structure of the Mn-N-C catalyst by introducing chalcogen oxygen groups (XO<inf>2</inf>, X = S, Se, Te), which induce changes in the Mn-N bond length in the MnN<inf>4</inf> structure, thereby modulating the electronic structure of the metal center Mn. The experimental results demonstrate that the introduction of XO<inf>2</inf> groups results in the rearrangement of Mn 3d electrons, which can be strongly correlated with the ORR activity of the Mn-N-C catalysts, among which the SeO<inf>2</inf> modification increases the kinetic current density of the Mn-N-C catalyst achieving a half-wave potential (E<inf>1/2</inf>) of 0.79 V versus the reversible hydrogen electrode, approaching that of Fe-N-C catalysts along with significant stability in acidic media. The promising performance of the Mn-N-C catalyst as a PGM-free cathode was confirmed through fuel cell testing. First-principles calculations demonstrate that the introduced XO<inf>2</inf> group downshifts the d-band center of the Mn center, thus successfully optimizing the adsorption of oxygen intermediates. This finding significantly facilitates the activity enhancement of Mn-N-C catalysts via the construction of a geometric structure-electronic structure-catalytic property relationship. © 2025 The Royal Society of Chemistry.",,Bioremediation; Bond length; Cathodes; Manganese alloys; Manganese compounds; Oxygen reduction reaction; Photodissociation; Reaction intermediates; Selenium compounds; Semiconductor doping; Tellurium compounds; 2-group; Chalcogens; Electronic.structure; Oxygen groups; Poor stability; Proton-exchange membranes fuel cells; Single-atoms; Te doping; ]+ catalyst; Electrolytic reduction,Bioremediation;Bond length;Cathodes;Manganese alloys;Manganese compounds;Oxygen reduction reaction;Photodissociation;Reaction intermediates;Selenium compounds;Semiconductor doping;Tellurium compounds;2-group;Chalcogens;Electronic.structure;Oxygen groups;Poor stability;Proton-exchange membranes fuel cells;Single-atoms;Te doping;]+ catalyst;Electrolytic reduction,"P. Yin; Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Institute of New-Energy, School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China; email: pengfeiyin@tju.edu.cn; T. Ling; Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Institute of New-Energy, School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China; email: lingt04@tju.edu.cn",,,,,,Royal Society of Chemistry,14639262,9781613248775,GRCHF,,English,Green Chem.,Article,Scopus,,2-s2.0-105003670262,,China,tju.edu.cn,,,"Zhao, Y.; Wang, R.; Li, J.; Guo, J.; Wang, Q.; Lv, Z.; Yin, P.; Ling, T."
"Persky, Y., Yurko, Y., Snitkoff-Sol, R.Z., Zion, N., Elbaz, L.",Tuning the performance of Fe-porphyrin aerogel-based PGM-free oxygen reduction reaction catalysts in proton exchange membrane fuel cells,2023,NANOSCALE,16,1,,438,446,9,12,10.1039/d3nr04315k,,"[Persky, Yeela; Yurko, Yan; Snitkoff-Sol, Rifael Z.; Zion, Noam; Elbaz, Lior] Bar Ilan Univ, Bar Ilan Ctr Nanotechnol & Adv Mat, Chem Dept, IL-5290002 Ramat Gan, Israel",,"Fe-N-C catalysts are currently the leading candidates to replace Pt-based catalysts for the oxygen reduction reaction in proton exchange membrane fuel cells. To maximize their activity, it is necessary to optimize their structure to allow high active site density on one hand, and hierarchical porous structure that will allow good mass transport of reactants and products to and from the active sites on the other hand. Hence, the hierarchical structure of the catalyst plays an important role in the balance between the electrochemical active site density and the mass transport resistance. Aerogels were synthesized in this work to study the interplay between these two parameters. Aerogels are covalent organic frameworks with ultra-low density, high porosity, and large surface area. The relative ease of tuning the composition and pore structure of aerogels make them prominent candidates for catalysis. Herein, we report on a tunable Fe-N-C catalyst based on an Fe porphyrin aerogel, which shows high electrocatalytic oxygen reduction reaction activity with tunable hierarchical pore structure and studied the influence of the porous structure on the overall performance in proton exchange membrane fuel cells. The distance between active sites in Fe-N-C ORR catalysts can be fine-controlled in aerogel-based frameworks, and greatly affect their performance in proton exchange membrane fuel cells.",,ACTIVE-SITE DENSITY; PORE-SIZE; ELECTROCATALYSTS; ORR,ACTIVE-SITE DENSITY;PORE-SIZE;ELECTROCATALYSTS;ORR,lior.elbaz@biu.ac.il,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2040-3364,,,38083971,English,NANOSCALE,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:001122580800001,2-s2.0-85179830330,Israel,biu.ac.il,Bar Ilan Univ,"Bar Ilan Univ, Israel","Persky, Yeela; Yurko, Yan; Snitkoff-Sol, Rifael Z.; Zion, Noam; Elbaz, Lior"
"Liu, Y., Liu, X., Lv, Z., Liu, R., Li, L., Wang, J., Yang, W., Jiang, X., Feng, X., Wang, B.",Tuning the Spin State of the Iron Center by Bridge-Bonded Fe-O-Ti Ligands for Enhanced Oxygen Reduction,2022,Angewandte Chemie - International Edition,61,21,e202117617,,,,167,10.1002/anie.202117617,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85126758170&doi=10.1002%2Fanie.202117617&partnerID=40&md5=4fb473541f77a845718e129f8a6a771b,"School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China; China-Japan Friendship Hospital, Beijing, Beijing, China","Liu, Yarong, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China; Liu, Xiangjian, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China; Lv, Zunhang, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China; Liu, Rui, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China; Li, Liuhua, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China; Wang, Jinming, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China; Yang, Wenxiu, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China; Jiang, Xin, China-Japan Friendship Hospital, Beijing, Beijing, China; Feng, Xiao, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China; Wang, Bo, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China","Exploring functional substrates and precisely regulating the electronic structures of atomic metal active species with moderate spin state are of great importance yet remain challenging. Hereon, we provide an axial Fe-O-Ti ligand regulated spin-state transition strategy to improve the oxygen reduction reaction (ORR) activity of Fe centers. Theoretical calculations indicate that Fe-O-Ti ligands in FeN<inf>3</inf>O-O-Ti can induce a low-to-medium spin-state transition and optimize O<inf>2</inf> adsorption by FeN<inf>3</inf>O. As a proof-of-concept, the oriented catalyst was prepared from atomic-Fe-doped polymer-like quantum dots and ultrathin o-terminated MXene. The optimal catalyst exhibits an intrinsic activity that is almost 5 times higher than the control sample (without axial Fe-O-Ti ligands). It also delivers a superior performance in Zn-air batteries and H<inf>2</inf>/O<inf>2</inf> anion exchange membrane fuel cells in a wide-temperature range. © 2022 Wiley-VCH GmbH.",Axial Coordination; Electrocatalysis; Oxygen Reduction Reaction; Single-Atom Catalyst; Spin-State Tuning,Atoms; Carbon; Catalyst activity; Electrocatalysis; Electrolytic reduction; Electronic structure; Ion exchange; Ion exchange membranes; Iron; Ligands; Oxygen reduction reaction; Proton exchange membrane fuel cells (PEMFC); Semiconductor quantum dots; Spin dynamics; Substrates; Tuning; Axial coordination; Fe O; Iron centers; Single-atom catalyst; Single-atoms; Spin state; Spin state transition; Spin-state tuning; ]+ catalyst; Oxygen,Axial Coordination;Electrocatalysis;Oxygen Reduction Reaction;Single-Atom Catalyst;Spin-State Tuning;Atoms;Carbon;Catalyst activity;Electrolytic reduction;Electronic structure;Ion exchange;Ion exchange membranes;Iron;Ligands;Proton exchange membrane fuel cells (PEMFC);Semiconductor quantum dots;Spin dynamics;Substrates;Tuning;Fe O;Iron centers;Single-atoms;Spin state;Spin state transition;]+ catalyst;Oxygen,"W. Yang; Key Laboratory of Cluster Science Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Technology Research Institute (Jinan), Advanced Research Institute of Multidisciplinary Science, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, No. 5, South Street, Zhongguancun, Haidian District, 100081, China; email: yangwx19@bit.edu.cn; B. Wang; Key Laboratory of Cluster Science Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Technology Research Institute (Jinan), Advanced Research Institute of Multidisciplinary Science, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, No. 5, South Street, Zhongguancun, Haidian District, 100081, China; email: bowang@bit.edu.cn; X. Jiang; Orthopaedics Department. China-Japan Friendship Hospital, Beijing, Yinghua street, Chaoyang district, China; email: 18612561166@163.com",,,,,,John Wiley and Sons Inc,14337851,,ACIEF,,English,Angew. Chem. Int. Ed.,Article,Scopus,,2-s2.0-85126758170,,China,bit.edu.cn,,,"Liu, Y.; Liu, X.; Lv, Z.; Liu, R.; Li, L.; Wang, J.; Yang, W.; Jiang, X.; Feng, X.; Wang, B."
"Ye, Y.F., Cai, F., Yan, C.C., Li, Y.S., Wang, G.X., Bao, X.H.",Two-step pyrolysis of ZIF-8 functionalized with ammonium ferric citrate for efficient oxygen reduction reaction,2017,JOURNAL OF ENERGY CHEMISTRY,26,6,,1174,1180,7,37,10.1016/j.jechem.2017.06.013,,"[Ye, Yifan; Cai, Fan; Yan, Chengcheng; Wang, Guoxiong; Bao, Xinhe] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China; [Ye, Yifan; Cai, Fan; Yan, Chengcheng] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Li, Yanshuo] Ningbo Univ, Sch Mat Sci & Chem Engn, Ningbo 315211, Zhejiang, Peoples R China",,"Zeolitic imidazolate frameworks (ZIFs) are widely employed in catalyst synthesis as parental materials for electrochemical energy storage and conversion. Herein, we have demonstrated a facile synthesis of highly efficient catalyst for oxygen reduction reaction in both alkaline and acidic medium, which is derived from ZIF-8 functionalized with ammonium ferric citrate via two-step pyrolysis in Ar and NH3 atmosphere. The results reveal that the catalytic activity improvement after NH3 pyrolysis benefits from mesopore-dominated morphology and high utilization of Fe-containing active sites. The optimum catalyst shows excellent performance in zinc-air battery and polymer electrolyte membrane fuel cell tests. (C) 2017 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.",Zeolitic imidazolate frameworks; Two-step pyrolysis; Oxygen reduction reaction; Zinc-air battery; Polymer electrolyte membrane fuel cell,METAL-ORGANIC FRAMEWORKS; AIR BATTERIES; FUEL-CELLS; IRON NANOPARTICLES; FE/N/C-CATALYSTS; IONIC LIQUIDS; MASS ACTIVITY; ACTIVE-SITES; ACIDIC MEDIA; CARBON,Zeolitic imidazolate frameworks;Two-step pyrolysis;Oxygen reduction reaction;Zinc-air battery;Polymer electrolyte membrane fuel cell;METAL-ORGANIC FRAMEWORKS;AIR BATTERIES;FUEL-CELLS;IRON NANOPARTICLES;FE/N/C-CATALYSTS;IONIC LIQUIDS;MASS ACTIVITY;ACTIVE-SITES;ACIDIC MEDIA;CARBON,wanggx@dicp.ac.cn; xhbao@dicp.ac.cn,,"PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS",,,,ELSEVIER SCIENCE BV,2095-4956,,,,English,J ENERGY CHEM,Article,WoS,Chemistry; Energy & Fuels; Engineering,WOS:000415600300014,,China,dicp.ac.cn,Chinese Acad Sci;Univ Chinese Acad Sci;Ningbo Univ,"Chinese Acad Sci, China;Univ Chinese Acad Sci, China;Ningbo Univ, China","Ye, Yifan; Cai, Fan; Yan, Chengcheng; Li, Yanshuo; Wang, Guoxiong; Bao, Xinhe"
"Zheng, L., Dong, Y.Y., Chi, B., Cui, Z.M., Deng, Y.J., Shi, X.D., Du, L., Liao, S.J.",UIO-66-NH2-Derived Mesoporous Carbon Catalyst Co-Doped with Fe/N/S as Highly Efficient Cathode Catalyst for PEMFCs,2019,SMALL,15,4,1803520,,,11,87,10.1002/smll.201803520,,"[Zheng, Long; Dong, Yuanyuan; Chi, Bin; Cui, Zhiming; Deng, Yijie; Shi, Xiudong; Du, Li; Liao, Shijun] South China Univ Technol, Key Lab Fuel Cell Technol Guangdong Prov, Coll Chem & Chem Engn, Guangzhou 510641, Guangdong, Peoples R China; [Zheng, Long; Dong, Yuanyuan; Chi, Bin; Cui, Zhiming; Deng, Yijie; Shi, Xiudong; Du, Li; Liao, Shijun] South China Univ Technol, Key Lab New Energy, Coll Chem & Chem Engn, Guangzhou 510641, Guangdong, Peoples R China",,"Efficient, low-cost catalysts are desirable for the sluggish oxygen reduction reaction (ORR). Herein, UIO-66-NH2-derived multi-element (Fe, S, N) co-doped porous carbon catalyst is reported, Fe/N/S-PC, with an octahedral morphology, a well-defined mesoporous structure, and highly dispersed doping elements, synthesized by a double-solvent diffusion-pyrolysis method (DSDPM). The morphology of the UIO-66-NH2 precursor is perfectly inherited by the derived carbon material, resulting in a high surface area, a well-defined mesoporous structure, and atomic-level dispersion of the doping elements. Fe/N/S-PC demonstrates outstanding catalytic activity and durability for the ORR in both alkaline and acidic solutions. In 0.1 m KOH, its half-potential reaches 0.87 V (vs reversible hydrogen electrode (RHE)), 30 mV more positive than that of a 20 wt% Pt/C catalyst. In 0.1 m HClO4, it reaches 0.785 V (vs RHE), only 65 mV less than that of Pt/C. The catalyst also exhibits excellent performance in acidic hydrogen/oxygen proton exchange membrane fuel cells. A membrane electrode assembly (MEA) with the catalyst as the cathode reaches 700 mA center dot cm(-2) at 0.6 V and a maximum power density of 553 mW center dot cm(-2), ranking it among the best MEAs with a nonprecious metal catalyst as the cathode.",catalysts; cathodes; derived carbon; metal-organic frameworks (MOFs); proton exchange membrane fuel cells (PEMFCs),OXYGEN REDUCTION REACTION; METAL-ORGANIC FRAMEWORKS; FE-N-C; MEMBRANE FUEL-CELLS; POROUS CARBON; PARTICLE-SIZE; ACTIVE-CENTER; ELECTROCATALYSTS; NITROGEN; IRON,catalysts;cathodes;derived carbon;metal-organic frameworks (MOFs);proton exchange membrane fuel cells (PEMFCs);OXYGEN REDUCTION REACTION;METAL-ORGANIC FRAMEWORKS;FE-N-C;MEMBRANE FUEL-CELLS;POROUS CARBON;PARTICLE-SIZE;ACTIVE-CENTER;ELECTROCATALYSTS;NITROGEN;IRON,cuizhiming@scut.edu.cn; chsjliao@scut.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1613-6810,,,30561824,English,SMALL,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000456849600005,2-s2.0-85058715925,China,scut.edu.cn,South China Univ Technol,"South China Univ Technol, China","Zheng, Long; Dong, Yuanyuan; Chi, Bin; Cui, Zhiming; Deng, Yijie; Shi, Xiudong; Du, Li; Liao, Shijun"
"Ghotbi, M., Feli, B., Azadfalah, M., Javaheri, M.",Ultra high performance N-doped carbon catalysts for the ORR derived from the reaction between organic-nitrate anions inside a layered nanoreactor,2015,RSC Advances,5,112,,92577,92584,,12,10.1039/c5ra14987h,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946565846&doi=10.1039%2Fc5ra14987h&partnerID=40&md5=7da538fb69ebf40cfab35f470e87d1f0,"Department of Materials Engineering, Malayer University, Malayer, Hamadan, Iran; Materials and Energy Research Centre Iran, Karaj, Iran","Ghotbi, Mohammad Yeganeh, Department of Materials Engineering, Malayer University, Malayer, Hamadan, Iran; Feli, Behzad, Department of Materials Engineering, Malayer University, Malayer, Hamadan, Iran; Azadfalah, Marziyeh, Department of Materials Engineering, Malayer University, Malayer, Hamadan, Iran; Javaheri, Masoumeh, Materials and Energy Research Centre Iran, Karaj, Iran","The extensive research on the synthesis of nitrogen-doped carbon materials (NCMs) as non-precious metal catalysts (NPMCs) has shown a promising future for applying the NPMCs to catalyze the slow oxygen reduction reaction (ORR) in polymer electrolyte fuel cells (PEFCs) and, therefore, the widespread use of devices based on PEFCs. However, the main reasons for the delay in starting the practical use of NCMs in PEFCs are the use of very specific organic chemicals as well as multiple stages of the catalyst synthesis, lack of stability, activity and/or selectivity limitations. Here we show that the NCMs can be produced by a simple route on a very large scale using any organic anions for the first time. The synthesized carbon catalysts showed highly porous structures, tunable nitrogen content and high electrochemical performance. As the best performing catalyst it had an open circuit potential (OCP) of as high as 1.04 V, and a Tafel slope of as low as 38.0 mV per decade with an exchange current density of as high as 1.34 × 10-4 A cm-2, which is a much higher performance compared to other NPMCs. © The Royal Society of Chemistry 2015.",,Catalyst selectivity; Catalysts; Doping (additives); Electrolytes; Electrolytic reduction; Fuel cells; Nitrogen; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Synthesis (chemical); Electrochemical performance; Exchange current densities; Nitrogen-doped carbons; Non-precious metal catalysts; Open circuit potential; Oxygen reduction reaction; Polymer electrolyte fuel cells; Ultra high performance; Organic chemicals,Catalyst selectivity;Catalysts;Doping (additives);Electrolytes;Electrolytic reduction;Fuel cells;Nitrogen;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Synthesis (chemical);Electrochemical performance;Exchange current densities;Nitrogen-doped carbons;Non-precious metal catalysts;Open circuit potential;Oxygen reduction reaction;Polymer electrolyte fuel cells;Ultra high performance;Organic chemicals,,,,,,,Royal Society of Chemistry,,,RSCAC,,English,RSC Adv.,Article,Scopus,,2-s2.0-84946565846,,Iran,No email,,,"Ghotbi, M.; Feli, B.; Azadfalah, M.; Javaheri, M."
"Gong, L., Zhu, X., Nga, T.T.T., Liu, Q., Wu, Y., Yang, P., Zhou, Y., Xiao, Z., Dong, C.L., Fu, X.Z., Tao, L., Wang, S.",Ultra-Low-Potential Methanol Oxidation on Single-Ir-Atom Catalyst,2024,Angewandte Chemie - International Edition,63,28,e202404713,,,,32,10.1002/anie.202404713,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85194920328&doi=10.1002%2Fanie.202404713&partnerID=40&md5=e2b5b32cfd3a1a96273d96efb91673d8,"Hunan University, Changsha, Hunan, China; College of Materials Science and Engineering, Shenzhen University, Shenzhen, Guangdong, China; Hunan University, Changsha, Hunan, China; School of Chemistry and Chemical Engineering, Nantong University, Nantong, Jiangsu, China; School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, Jiangsu, China; Department of Physics, Tamkang University, Taipei, Taiwan","Gong, Liyuan, Hunan University, Changsha, Hunan, China, College of Materials Science and Engineering, Shenzhen University, Shenzhen, Guangdong, China; Zhu, Xiaorong, School of Chemistry and Chemical Engineering, Nantong University, Nantong, Jiangsu, China, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, Jiangsu, China; Nga, Ta Thi Thuy, Department of Physics, Tamkang University, Taipei, Taiwan; Liu, Qie, Hunan University, Changsha, Hunan, China; Wu, Yujie, Hunan University, Changsha, Hunan, China; Yang, Pupu, Hunan University, Changsha, Hunan, China; Zhou, Yangyang, Hunan University, Changsha, Hunan, China; Xiao, Zhaohui, Hunan University, Changsha, Hunan, China; Dong, Chungli, Department of Physics, Tamkang University, Taipei, Taiwan; Fu, Xianzhu, College of Materials Science and Engineering, Shenzhen University, Shenzhen, Guangdong, China; Tao, Li, Hunan University, Changsha, Hunan, China, Hunan University, Changsha, Hunan, China; Wang, Shuangyin, Hunan University, Changsha, Hunan, China, Hunan University, Changsha, Hunan, China","Methanol oxidation plays a central role to implement sustainable energy economy, which is restricted by the sluggish reaction kinetics due to the multi-electron transfer process accompanied by numerous sequential intermediate. In this study, an efficient cascade methanol oxidation reaction is catalyzed by single-Ir-atom catalyst at ultra-low potential (<0.1 V) with the promotion of the thermal and electrochemical integration in a high temperature polymer electrolyte membrane electrolyzer. At the elevated temperature, the electron deficient Ir site with higher methanol affinity could spontaneous catalyze the CH<inf>3</inf>OH dehydrogenation to CO under the voltage, then the generated CO and H<inf>2</inf> was electrochemically oxidized to CO<inf>2</inf> and proton. However, the methanol cannot thermally decompose with the voltage absence, which confirm the indispensable of the coupling of thermal and electrochemical integration for the methanol oxidation. By assembling the methanol oxidation reaction with hydrogen evolution reaction with single-Ir-atom catalysts in the anode chamber, a max hydrogen production rate reaches 18 mol g<inf>Ir</inf>−1 h−1, which is much greater than that of Ir nanoparticles and commercial Pt/C. This study also demonstrated the electrochemical methanol oxidation activity of the single atom catalysts, which broadens the renewable energy devices and the catalyst design by an integration concept. © 2024 Wiley-VCH GmbH.",coupling of thermal and electrochemical; methanol oxidation reaction; single atom catalysts; ultra-low-potential,Electron affinity; Electron transport properties; Hydrogen production; Integration; Methanol; Oxidation; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Reaction intermediates; Reaction kinetics; Coupling of thermal and electrochemical; Electrochemicals; Methanol Oxidation; Methanol oxidation reactions; Single atom catalyst; Single-atoms; Sustainable energy; Thermal; Ultra-low-potential; ]+ catalyst; Atoms; electrolyte; hydrogen; methanol; nanoparticle; polymer; anode electrode; article; atom; catalysis; catalyst; chemical reaction kinetics; controlled study; dehydrogenation; electric potential; electrocatalysis; electron; electron transport; high temperature; hydrogen evolution reaction; membrane; oxidation; renewable energy; temperature,coupling of thermal and electrochemical;methanol oxidation reaction;single atom catalysts;ultra-low-potential;Electron affinity;Electron transport properties;Hydrogen production;Integration;Methanol;Oxidation;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Reaction intermediates;Reaction kinetics;Electrochemicals;Methanol Oxidation;Methanol oxidation reactions;Single atom catalyst;Single-atoms;Sustainable energy;Thermal;]+ catalyst;Atoms;electrolyte;hydrogen;nanoparticle;polymer;anode electrode;article;atom;catalysis;catalyst;chemical reaction kinetics;controlled study;dehydrogenation;electric potential;electrocatalysis;electron;electron transport;high temperature;hydrogen evolution reaction;membrane;renewable energy;temperature,"L. Tao; State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, the National Supercomputer Centers in Changsha, Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, Changsha, 410082, China; email: taoli@hnu.edu.cn; S. Wang; State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, the National Supercomputer Centers in Changsha, Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, Changsha, 410082, China; email: shuangyinwang@hnu.edu.cn",,,,,,John Wiley and Sons Inc,14337851,,ACIEF,38670925,English,Angew. Chem. Int. Ed.,Article,Scopus,,2-s2.0-85194920328,,China;Taiwan,hnu.edu.cn,,,"Gong, L.; Zhu, X.; Nga, T.T.T.; Liu, Q.; Wu, Y.; Yang, P.; Zhou, Y.; Xiao, Z.; Dong, C.-L.; Fu, X.-Z.; Tao, L.; Wang, S."
"Xia, D.S., Tang, X., Dai, S., Ge, R.L., Rykov, A., Wang, J.H., Huang, T.H., Wang, K.W., Wei, Y.P., Zhang, K., Li, J., Gan, L., Kang, F.Y.",Ultrastable Fe-N-C Fuel Cell Electrocatalysts by Eliminating Non-Coordinating Nitrogen and Regulating Coordination Structures at High Temperatures,2023,ADVANCED MATERIALS,35,5,,,,11,96,10.1002/adma.202204474,,"[Xia, Dongsheng; Wei, Yinping; Zhang, Kai; Li, Jia; Gan, Lin; Kang, Feiyu] Tsinghua Univ, Inst Mat Res, Tsinghua Shenzhen Int Grad Sch, Shenzhen Geim Graphene Res Ctr, Shenzhen 518055, Peoples R China; [Tang, Xuan; Dai, Sheng] East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, Frontiers Sci Ctr Materiobiol & Dynam Chem,Feringa, Shanghai 200237, Peoples R China; [Tang, Xuan; Dai, Sheng] East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, Frontiers Sci Ctr Materiobiol & Dynam Chem,Feringa, Shanghai 200237, Peoples R China; [Ge, Rile; Rykov, Alexander; Wang, Junhu] Chinese Acad Sci, Dalian Inst Chem Phys, Ctr Adv Mossbauer Spect, Mossbauer Effect Data Ctr, Dalian 116023, Peoples R China; [Huang, Tzu-Hsi; Wang, Kuan-Wen] Natl Cent Univ, Inst Mat Sci & Engn, Taoyuan 320, Taiwan",,"Pyrolyzed Fe-N-C materials have attracted considerable interest as one of the most active noble-metal-free electrocatalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). Despite significant progress is made in improving their catalytic activity during past decades, the Fe-N-C catalysts still suffer from fairly poor electrochemical and storage stability, which greatly hurdles their practical application. Here, an effective strategy is developed to greatly improve their catalytic stability in PEMFCs and storage stability by virtue of previously unexplored high-temperature synthetic chemistry between 1100 and 1200 degrees C. Pyrolysis at this rarely adopted temperature range not only enables the elimination of less active nitrogen-doped carbon sites that generate detrimental peroxide byproduct but also regulates the coordination structure of Fe-N-C from less stable D1 (O-FeN4C12) to a more stable D2 structure (FeN4C10). The optimized Fe-N-C catalyst exhibits excellent stability in PEMFCs (>80% performance retention after 30 h under H-2/O-2 condition) and no activity loss after 35 day storage while maintaining a competitive ORR activity and PEMFC performance.",coordination structures; Fe-N-C single atom catalysts; operation; storage stability; oxygen reduction reaction; proton exchange membrane fuel cells,OXYGEN REDUCTION REACTION; NONPRECIOUS METAL ELECTROCATALYSTS; IRON-BASED CATALYSTS; DOPED CARBON; HIGH-PERFORMANCE; ACTIVE-SITES; FE/N/C-CATALYSTS; IDENTIFICATION; SPECTROSCOPY,coordination structures;Fe-N-C single atom catalysts;operation;storage stability;oxygen reduction reaction;proton exchange membrane fuel cells;NONPRECIOUS METAL ELECTROCATALYSTS;IRON-BASED CATALYSTS;DOPED CARBON;HIGH-PERFORMANCE;ACTIVE-SITES;FE/N/C-CATALYSTS;IDENTIFICATION;SPECTROSCOPY,shengdai@ecust.edu.cn; lgan@sz.tsinghua.edu.cn; fykang@mail.tsinghua.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,0935-9648,,,36398715,English,ADV MATER,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science; Physics,WOS:000899653800001,2-s2.0-85144229327,China;Taiwan,ecust.edu.cn,Tsinghua Univ;East China Univ Sci & Technol;Chinese Acad Sci;Natl Cent Univ,"Tsinghua Univ, China;East China Univ Sci & Technol, China;Chinese Acad Sci, China;Natl Cent Univ, Taiwan","Xia, Dongsheng; Tang, Xuan; Dai, Sheng; Ge, Rile; Rykov, Alexander; Wang, Junhu; Huang, Tzu-Hsi; Wang, Kuan-Wen; Wei, Yinping; Zhang, Kai; Li, Jia; Gan, Lin; Kang, Feiyu"
"Matanovic, I., Artyushkova, K., Atanassov, P.",Understanding PGM-free catalysts by linking density functional theory calculations and structural analysis: Perspectives and challenges,2018,CURRENT OPINION IN ELECTROCHEMISTRY,9,,,137,144,8,96,10.1016/j.coelec.2018.03.009,,"[Matanovic, Ivana; Artyushkova, Kateryna; Atanassov, Plamen] Univ New Mexico, Dept Chem & Biol Engn, CMEM, Albuquerque, NM 87131 USA; [Matanovic, Ivana] Los Alamos Natl Lab, Theoret Div, Los Alamos, NM 87545 USA",,"We discuss perspectives and challenges in applying density functional theory for the calculation of spectroscopic properties of platinum group metal (PGM)-free electrocatalysts for oxygen reduction. More specifically, we discuss recent advances in the density functional theory calculations of core-level shifts in binding energies of N 1s electrons as measured by X-ray photoelectron spectroscopy. The link between the density functional theory calculations, the electrocatalytic performance of the catalysts, and structural analysis using modern spectroscopic techniques is expected to significantly increase our understanding of PGM-free catalysts at the molecular level.",,OXYGEN-REDUCTION REACTION; NITROGEN-DOPED CARBON; PEM FUEL-CELLS; ACTIVE-SITES; FE/N/C-CATALYSTS; RECENT PROGRESS; METAL; FE; ELECTROCATALYSTS; IDENTIFICATION,OXYGEN-REDUCTION REACTION;NITROGEN-DOPED CARBON;PEM FUEL-CELLS;ACTIVE-SITES;FE/N/C-CATALYSTS;RECENT PROGRESS;METAL;FE;ELECTROCATALYSTS;IDENTIFICATION,igonzales@unm.edu,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,2451-9103,,,,English,CURR OPIN ELECTROCHE,Review,WoS,Chemistry; Electrochemistry; Materials Science,WOS:000442798800020,,United States,unm.edu,Univ New Mexico;Los Alamos Natl Lab,"Univ New Mexico, United States;Los Alamos Natl Lab, United States","Matanovic, Ivana; Artyushkova, Kateryna; Atanassov, Plamen"
"Dung, T.P., Nguyen Nguyen, P.T., Chihaia, V., Son, D.N.",Understanding the activity origin and mechanisms of the oxygen reduction reaction on the tetramethyl metalloporphyrin/MoS2 electrocatalyst,2025,RSC Advances,15,12,,9254,9264,,1,10.1039/d5ra00814j,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105001581304&doi=10.1039%2Fd5ra00814j&partnerID=40&md5=a287708ed8be38a23efc425fc72a7e84,"Department of Chemistry, University of Science, Viet Nam National University Ho Chi Minh City, Ho Chi Minh City, Viet Nam; Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Viet Nam; Institute of Physical Chemistry, Romanian Academy of Sciences, Bucharest, Romania; Ho Chi Minh City University of Technology - HCMUT, Ho Chi Minh City, Viet Nam; Viet Nam National University Ho Chi Minh City, Ho Chi Minh City, Viet Nam","Dung, Tranphuong, Department of Chemistry, University of Science, Viet Nam National University Ho Chi Minh City, Ho Chi Minh City, Viet Nam, Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Viet Nam; Nguyen Nguyen, Pham Tran, Department of Chemistry, University of Science, Viet Nam National University Ho Chi Minh City, Ho Chi Minh City, Viet Nam; Chihaia, V., Institute of Physical Chemistry, Romanian Academy of Sciences, Bucharest, Romania; Son, Dongoc, Ho Chi Minh City University of Technology - HCMUT, Ho Chi Minh City, Viet Nam, Viet Nam National University Ho Chi Minh City, Ho Chi Minh City, Viet Nam","The efficiency of the oxygen reduction reaction (ORR) on the cathode plays a crucial role in determining the performance of proton exchange membrane fuel cells. Porphyrin, distinguished by its cost-effectiveness, eco-friendly nature, and efficient utilization of its metal, stands out as a promising candidate for a metal single-atom catalyst in fuel cell cathodes. The metal and support modifications significantly impact the porphyrin's ORR activity. Nevertheless, the effects of Ni, Co, and Fe metals in tetramethyl metalloporphyrin/MoS<inf>2</inf>, named MeTMP/MoS<inf>2</inf>, catalyst on the mechanisms and activity of the ORR remain unknown. This study elucidates the topic using van der Waals dispersion-corrected density functional theory (DFT) calculations and thermodynamic model. Results showed that the rate-limiting step is located at the first and second hydrogenation steps in the associative mechanisms for Ni and Co (Fe) substitutions, respectively. For the dissociative mechanisms, the dissociation of molecular oxygen to two oxygen atoms is the rate-determining step on all the NiTMP/MoS<inf>2</inf>, CoTMP/MoS<inf>2</inf>, and FeTMP/MoS<inf>2</inf> catalysts. The presence of the MoS<inf>2</inf> support significantly reduces the thermodynamic activation barrier of the ORR, and hence improves the ORR activity in the dissociative mechanisms. This activation barrier is 3.45, 0.92, and 1.82 eV for NiTMP/MoS<inf>2</inf>, CoTMP/MoS<inf>2</inf>, and FeTMP/MoS<inf>2</inf>, which is much better compared to 4.85, 3.34, and 2.19 eV for NiTMP, CoTMP, and FeTMP, respectively. CoTMP/MoS<inf>2</inf> is the best candidate among the considered catalysts for the ORR. Furthermore, we provide a detailed explanation of the physical insights into the interaction between the ORR intermediates and the catalysts. © 2025 The Royal Society of Chemistry.",,Bioremediation; Dissociation; Heat conduction; Hydrogenation; Iron; Nickel; Oxygen reduction reaction; Rate constants; Temperature; Activation barriers; Dissociative mechanisms; Metalloporphyrins; MoS 2; Performance; Proton-exchange membranes fuel cells; Reaction activity; Tetramethyl; ]+ catalyst; Electrolytic reduction,Bioremediation;Dissociation;Heat conduction;Hydrogenation;Iron;Nickel;Oxygen reduction reaction;Rate constants;Temperature;Activation barriers;Dissociative mechanisms;Metalloporphyrins;MoS 2;Performance;Proton-exchange membranes fuel cells;Reaction activity;Tetramethyl;]+ catalyst;Electrolytic reduction,"D.N. Son; Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City, 268 Ly Thuong Kiet Street, District 10, Viet Nam; email: dnson@hcmut.edu.vn",,,,,,Royal Society of Chemistry,,,RSCAC,,English,RSC Adv.,Article,Scopus,,2-s2.0-105001581304,,Vietnam;Romania,hcmut.edu.vn,,,"Dung, T.P.; Nguyen Nguyen, P.T.; Chihaia, V.; Son, D.N."
"Chen, M.X., Tong, L., Liang, H.W.",Understanding the Catalytic Sites of Metal-Nitrogen-Carbon Oxygen Reduction Electrocatalysts,2021,CHEMISTRY-A EUROPEAN JOURNAL,27,1,,145,157,13,42,10.1002/chem.202002427,,"[Chen, Ming-Xi; Tong, Lei; Liang, Hai-Wei] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Dept Chem, Hefei 230026, Peoples R China",,"The development of low-cost catalysts containing earth-abundant elements as alternatives to Pt-based catalysts for the oxygen reduction reaction (ORR) is crucial for the large-scale commercial application of proton exchange membrane fuel cells (PEMFCs). Nonprecious metal-nitrogen-carbon (M-N-C) materials represent the most promising candidates to replace Pt-based catalysts for PEMFCs applications. However, the high-temperature pyrolysis process for the preparation of M-N-C catalysts frequently leads to high structural heterogeneity, that is, the coexistence of various metal-containing sites and N-doped carbon structures. Unfortunately, this impedes the identification of the predominant catalytic active structure, and thus, the further development of highly efficient M-N-C catalysts for the ORR. This Minireview, after a brief introduction to the development of M-N-C ORR catalysts, focuses on the commonly accepted views of predominant catalytic active structures in M-N-C catalysts, including atomically dispersed metal-N-x sites, metal nanoparticles encapsulated with nitrogen-doped carbon structures, synergistic action between metal-N-x sites and encapsulated metal nanoparticles, and metal-free nitrogen-doped carbon structures.",active sites; encapsulated nanoparticles; electrocatalysts; fuel cells; nanostructures; oxygen reduction reaction,HIGH-PERFORMANCE ELECTROCATALYSTS; ENCAPSULATED IRON NANOPARTICLES; PEM FUEL-CELLS; ACTIVE-SITES; DOPED CARBON; CATHODE CATALYSTS; O-2 REDUCTION; ELECTROCHEMICAL PROPERTIES; HETEROGENEOUS CATALYSIS; MOSSBAUER-SPECTROSCOPY,active sites;encapsulated nanoparticles;electrocatalysts;fuel cells;nanostructures;oxygen reduction reaction;HIGH-PERFORMANCE ELECTROCATALYSTS;ENCAPSULATED IRON NANOPARTICLES;PEM FUEL-CELLS;ACTIVE-SITES;DOPED CARBON;CATHODE CATALYSTS;O-2 REDUCTION;ELECTROCHEMICAL PROPERTIES;HETEROGENEOUS CATALYSIS;MOSSBAUER-SPECTROSCOPY,hwliang@ustc.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,0947-6539,,,32706127,English,CHEM-EUR J,Review,WoS,Chemistry,WOS:000583799400001,2-s2.0-85093984158,China,ustc.edu.cn,Univ Sci & Technol China,"Univ Sci & Technol China, China","Chen, Ming-Xi; Tong, Lei; Liang, Hai-Wei"
"Zhang, W., Han, G.K., Liu, C.P., Zhang, X., Xing, W., Du, C.Y.",Unique electron-feeding mechanism in CoN3O for enhanced acidic oxygen reduction,2024,CHEMICAL ENGINEERING JOURNAL,500,,156980,,,9,1,10.1016/j.cej.2024.156980,,"[Zhang, Wei; Han, Guokang; Du, Chunyu] Harbin Inst Technol, Sch Chem & Chem Engn, State Key Lab Space Power Sources, Harbin 150001, Peoples R China; [Liu, Changpeng; Xing, Wei] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Jilin, Peoples R China; [Zhang, Xue] Shenzhen Univ, Coll Chem & Environm Engn, Shenzhen 518060, Guangdong, Peoples R China",,"Co-centered single-atom catalysts (SACs) have emerged as an increasingly promising non-platinum group candidate for acidic oxygen reduction reaction (ORR) due to their balanced activity and stability. However, the intrinsic ORR activity of present Co-centered SACs remains far below the commercial Pt/C. Herein, a CoN3O- structured SAC is successfully fabricated by a gas-phase strategy and achieves a peak power density of 492.6 mW cm- 2 under the 1.0 bar H2/air condition, demonstrating its excellent application potential in practical fuel cells. Unique electron-feeding mechanism is revealed to account for the remarkably enhanced ORR activity inner CoN3O SAC. It is indicated that the electron interaction inner active site governed by both electronegativity in sigma bond and d-p back-feeding in pi bond reaches balance at CoN3O, thus optimized adsorption of oxygen-containing intermediates. Our work provides multiple insights into the orbital scale laws for higher-performance PGM-free ORR catalysts.",Electron-feeding mechanism; Cobalt; Proton exchange membrane fuel cells; Oxygen reduction reaction; Single-atom catalyst,CATHODE CATALYSTS,Electron-feeding mechanism;Cobalt;Proton exchange membrane fuel cells;Oxygen reduction reaction;Single-atom catalyst;CATHODE CATALYSTS,gkhan@hit.edu.cn; xzhang0207@szu.edu.cn; cydu@hit.edu.cn,,"PO BOX 564, 1001 LAUSANNE, SWITZERLAND",,,,ELSEVIER SCIENCE SA,1385-8947,,,,English,CHEM ENG J,Article,WoS,Engineering,WOS:001357563400001,2-s2.0-85208601183,China,hit.edu.cn,Harbin Inst Technol;Chinese Acad Sci;Shenzhen Univ,"Harbin Inst Technol, China;Chinese Acad Sci, China;Shenzhen Univ, China","Zhang, Wei; Han, Guokang; Liu, Changpeng; Zhang, Xue; Xing, Wei; Du, Chunyu"
"Liu, Q., Liu, W., Wan, X., Chen, W., Liu, X., Liu, X., Shang, J., Miao, J., Su, D., Sun, X., Shui, J.",Unique Graphitization of Ultra-Small Nano ZIF-8 and Its Application in High-Performance Fe–N–C Fuel Cell Catalyst,2025,Advanced Functional Materials,35,43,2507376,,,,13,10.1002/adfm.202507376,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105004355329&doi=10.1002%2Fadfm.202507376&partnerID=40&md5=4c1521cd359ad34cad0f4c95e86d6c2f,"Beihang University, Beijing, China; Beihang University, Beijing, China; Beihang University, Beijing, China; Institute of Physics Chinese Academy of Sciences, Beijing, Beijing, China; National Key Laboratory of Scattering and Radiation, Beijing, Beijing, China","Liu, Qingtao, Beihang University, Beijing, China, Beihang University, Beijing, China, Beihang University, Beijing, China; Liu, Weihao, Beihang University, Beijing, China; Wan, Xin, Beihang University, Beijing, China; Chen, Weiwei, Institute of Physics Chinese Academy of Sciences, Beijing, Beijing, China; Liu, Xiaozhi, Institute of Physics Chinese Academy of Sciences, Beijing, Beijing, China; Liu, Xiaofang, Beihang University, Beijing, China; Shang, Jiaxiang, Beihang University, Beijing, China; Miao, Jieqiong Gang, Beihang University, Beijing, China; Su, Dong, Institute of Physics Chinese Academy of Sciences, Beijing, Beijing, China; Sun, Xin, National Key Laboratory of Scattering and Radiation, Beijing, Beijing, China; Shui, Jianglan, Beihang University, Beijing, China, Beihang University, Beijing, China","Zeolitic imidazolate framework-8 (ZIF-8) is widely used as precursor for carbon-supported single-metal-atom catalysts (M–N–C), but typically yields amorphous carbon with poor stability in proton-exchange-membrane fuel cells (PEMFCs). Traditional methods would lose active site density while increasing the graphitization degree. Here, this study reports that ultra-small nano ZIF-8 can produce graphene-nanostacks-based Fe–N–C that has improvements on both activity and stability. First, anti-sintering nanoporous ZIF-8 (nano-ZIF8) particles are synthesized with unit size of 8 nm (the smallest so far) using a destruction-reconstruction strategy. In situ microscopy reveals that the volatilization of Zn has a decisive effect on the graphitization degree of ZIF-8 and such process is size-dependent. Nano-ZIF8 particles have completed Zn volatilization before graphitization process beginning, leading to graphene nanostacks. These nanostacks preferentially host edge-type FeN<inf>4</inf> sites, which have doubled intrinsic activity and much improved stability compared with conventional Fe−N−C. In PEMFC, the catalyst achieves an activity of 48.5 mA cm−2@0.9V<inf>iR-free</inf>, meeting the US Department of Energy 2025 activity target. In addition, quantitative analysis of active site density is conducted in PEMFC for the first time using nitrite stripping voltammetry. The unique graphitization behavior of nano-ZIF8 paves a new avenue for advancing M–N–C catalysts. © 2025 Wiley-VCH GmbH.",Fe–N–C; fuel cells; graphene nanostacks; in situ microscopy; nano ZIF–8,Graphitization; Active site density; Fe–N–C; Graphene nanostack; Graphenes; In-situ microscopies; Nano ZIF–8; Proton-exchange membranes fuel cells; Ultra-small; Zeolitic imidazolate framework-8; ]+ catalyst; Amorphous carbon,Fe–N–C;fuel cells;graphene nanostacks;in situ microscopy;nano ZIF–8;Graphitization;Active site density;Graphene nanostack;Graphenes;In-situ microscopies;Proton-exchange membranes fuel cells;Ultra-small;Zeolitic imidazolate framework-8;]+ catalyst;Amorphous carbon,"J. Shui; School of Materials Science and Engineering, Beihang University, Beijing, 100191, China; email: shuijianglan@buaa.edu.cn; D. Su; Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China; email: dongsu@iphy.ac.cn; X. Sun; National Key Laboratory of Scattering and Radiation, Beijing, 100854, China; email: sunxin52199@163.com",,,,,,John Wiley and Sons Inc,1616301X,,AFMDC,,English,Adv. Funct. Mater.,Article,Scopus,,2-s2.0-105004355329,,China,buaa.edu.cn,,,"Liu, Q.; Liu, W.; Wan, X.; Chen, W.; Liu, X.; Liu, X.; Shang, J.; Miao, J.; Su, D.; Sun, X.; Shui, J."
"Li, G., Yin, S.H., Ji, L.F., Nie, X.Y., Zhu, T., Cheng, X.Y., Xu, J., Huang, R., Jiang, Y.X., Zhang, B.W., Sun, S.G.",Universal electrochemical quantification of active site density in transition metal nitrogen carbon electrocatalysts,2025,NATURE COMMUNICATIONS,16,1,10626,,,12,0,10.1038/s41467-025-65614-1,,"[Li, Guang; Ji, Li-Fei; Cheng, Xiao-Yang; Huang, Rui; Jiang, Yan-Xia; Sun, Shi-Gang] Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Engn Res Ctr Electrochem Technol,Minist Educ, Xiamen, Peoples R China; [Yin, Shu-Hu; Zhu, Ting; Xu, Jun] Nantong Univ, Sch Microelect, Integrated Circuits Jiangsu Key Lab Semi Dev & IC, Nantong, Peoples R China; [Nie, Xu-Yuan; Zhang, Bin-Wei; Sun, Shi-Gang] Inst Adv Interdisciplinary Studies, Ctr Adv Electrochem Energy, Chongqing, Peoples R China; [Nie, Xu-Yuan; Zhang, Bin-Wei; Sun, Shi-Gang] Chongqing Univ, Sch Chem & Chem Engn, Chongqing, Peoples R China",,"In-situ electrochemical nitrite reduction is an established method to quantify site density (SD) of platinum-group-metal-free catalysts for PEM fuel cells. However, its poisoning mechanism remains unclear, often yielding underestimated values. Crucially, we identify a unique configuration where single metal centers adsorb two NO molecules, which challenges conventional electrochemical quantification. To resolve this, we developed an in-situ acid-assisted nitrite poisoning method (AANPM) coupled with graphene-based attenuated total reflection Fourier transform infrared spectroscopy (graphene-based in-situ ATR-FTIR). This approach quantifies SD and elucidates active site structures in transition metal-nitrogen-carbon (MNC) electrocatalysts. By incorporating the average electron transfer number for NO electroreduction (NOR), we achieve accurate SD calculations. Validated across iron/cobalt phthalocyanine molecular catalysts and pyrolyzed FeNC/CoNC materials, this method can be used to stablish structure-activity relations.",,OXYGEN REDUCTION REACTION; NITRIC-OXIDE; IN-SITU; NO; PERFORMANCE; CATALYSTS; MONOXIDE; BINDING; CYANIDE,OXYGEN REDUCTION REACTION;NITRIC-OXIDE;IN-SITU;NO;PERFORMANCE;CATALYSTS;MONOXIDE;BINDING;CYANIDE,shyin@ntu.edu.cn; yxjiang@xmu.edu.cn; binwei@cqu.edu.cn,,"HEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY",,,,NATURE PORTFOLIO,,,,41309541,English,NAT COMMUN,Article,WoS,Science & Technology - Other Topics,WOS:001627610000028,,China,ntu.edu.cn,Xiamen Univ;Nantong Univ;Inst Adv Interdisciplinary Studies;Chongqing Univ,"Xiamen Univ, China;Nantong Univ, China;Inst Adv Interdisciplinary Studies, China;Chongqing Univ, China","Li, Guang; Yin, Shu-Hu; Ji, Li-Fei; Nie, Xu-Yuan; Zhu, Ting; Cheng, Xiao-Yang; Xu, Jun; Huang, Rui; Jiang, Yan-Xia; Zhang, Bin-Wei; Sun, Shi-Gang"
"Zhou, Y., Chen, J., Huang, Z., Peng, Y., Xing, L., Tang, C., Wang, N., Meng, L., Wu, M., Du, L., Ye, S.",Unraveling a volcanic relationship of Co/N/C@PtxCo catalysts toward oxygen electro-reduction,2024,Nanoscale,16,10,,5215,5221,,3,10.1039/d3nr06647a,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85186077817&doi=10.1039%2Fd3nr06647a&partnerID=40&md5=339e1e151526b7aea740ef4474ab542b,"School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong, China; State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan, Hubei, China; SinoHykey Technology Company Ltd., Guangzhou, Guangdong, China","Zhou, Yangdong, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong, China; Chen, Junda, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong, China; Huang, Zhiyin, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong, China; Peng, Yuqin, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong, China; Xing, Lixin, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong, China; Tang, Chunmei, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong, China; Wang, Ning, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong, China; Meng, Ling, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong, China; Wu, Mingjie, State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan, Hubei, China; Du, Lei, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong, China; Ye, Siyu, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong, China, SinoHykey Technology Company Ltd., Guangzhou, Guangdong, China","The cathodic oxygen reduction reaction (ORR) has been continuously attracting worldwide interest due to the increasing popularity of proton exchange membrane (PEM) fuel cells. So far, various Pt-group metal (PGM) or PGM-free catalysts have been developed to facilitate the ORR. However, there is still a gap to achieve the expected goals as proposed by the U.S. Department of Energy (DoE). Recently, PGM-free@PGM hybrid catalysts, such as the M/N/C@PtM catalyst, have achieved the milestones of oxygen reduction, as reviewed in our recent work. It is, nevertheless, still challenging to unravel the underlying structure-property relationships. Here, by applying different Pt/Co ratios, a series of Co/N/C@Pt<inf>x</inf>Co catalysts are synthesized. Interestingly, the ORR activity and stability are not linear with the Pt content, but show a volcano-like curve with increased Pt usage. This relationship has been deeply unraveled to be closely related to the contents of pyrrolic N, pyridinic N, and graphitized carbon in catalysts. This work provides guidelines to rationally design the coupled PGM-free@PGM catalysts toward the ORR by appropriate surface engineering. © 2024 The Royal Society of Chemistry.",,Catalysts; Electrolytic reduction; Oxygen; Proton exchange membrane fuel cells (PEMFC); Cathodic oxygen reduction; Co catalysts; Metal free; Metal-free catalysts; Oxygen electro reductions; Oxygen reduction reaction; Proton-exchange membranes fuel cells; U.S. Department of Energy; Volcanics; ]+ catalyst; Volcanoes; carbon; fuel; oxygen; phosphoglucomutase; proton; article; catalyst; controlled study; human; pharmaceutics; volcano,Catalysts;Electrolytic reduction;Oxygen;Proton exchange membrane fuel cells (PEMFC);Cathodic oxygen reduction;Co catalysts;Metal free;Metal-free catalysts;Oxygen electro reductions;Oxygen reduction reaction;Proton-exchange membranes fuel cells;U.S. Department of Energy;Volcanics;]+ catalyst;Volcanoes;carbon;fuel;phosphoglucomutase;proton;article;catalyst;controlled study;human;pharmaceutics;volcano,"M. Wu; State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan, 430200, China; email: mjwu@wtu.edu.cn; L. Du; Huangpu Hydrogen Energy Innovation Centre, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Wai Huan Xi Road 230, 510006, China; email: lei.du@gzhu.edu.cn; S. Ye; Huangpu Hydrogen Energy Innovation Centre, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Wai Huan Xi Road 230, 510006, China; email: siyu.ye@gzhu.edu.cn",,,,,,Royal Society of Chemistry,20403364,,,38372788,English,Nanoscale,Article,Scopus,,2-s2.0-85186077817,,China,wtu.edu.cn,,,"Zhou, Y.; Chen, J.; Huang, Z.; Peng, Y.; Xing, L.; Tang, C.; Wang, N.; Meng, L.; Wu, M.; Du, L.; Ye, S."
"Choi, C.H., Choi, W.S., Kasian, O., Mechler, A.K., Sougrati, M.T., Bruller, S., Strickland, K., Jia, Q.Y., Mukerjee, S., Mayrhofer, K.J.J., Jaouen, F.",Unraveling the Nature of Sites Active toward Hydrogen Peroxide Reduction in Fe-N-C Catalysts,2017,ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,56,30,,8809,8812,4,216,10.1002/anie.201704356,,"[Choi, Chang Hyuck] Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Gwangju 61005, South Korea; [Mechler, Anna K.; Sougrati, Moulay Tahar; Bruller, Sebastian; Jaouen, Frederic] Univ Montpellier, Inst Charles Gerhardt Montpellier, 2 Pl Eugene Bataillon, F-34095 Montpellier, France; [Mechler, Anna K.] Max Planck Inst Chem Energy Convers, Stiftstr 34-36, D-45470 Mulheim, Germany; [Choi, Won Seok; Kasian, Olga; Strickland, Kara; Mayrhofer, Karl J. J.] Max Planck Inst Eisenforsch GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany; [Mayrhofer, Karl J. J.] Forschungszentrum Julich, Helmholtz Inst Erlangen Nurnberg Renewable Energy, Julich, Germany; [Mayrhofer, Karl J. J.] Friedrich Alexander Univ Erlangen Nurnberg, Dept Chem & Biol Engn, Egerlandstr 3, D-91058 Erlangen, Germany; [Strickland, Kara; Jia, Qingying; Mukerjee, Sanjeev] Northeastern Univ, Dept Chem & Chem Biol, Boston, MA 02115 USA",,"Fe-N-C catalysts with high O-2 reduction performance are crucial for displacing Pt in low-temperature fuel cells. However, insufficient understanding of which reaction steps are catalyzed by what sites limits their progress. The nature of sites were investigated that are active toward H2O2 reduction, a key intermediate during indirect O-2 reduction and a source of deactivation in fuel cells. Catalysts comprising different relative contents of FeNxCy moieties and Fe particles encapsulated in N-doped carbon layers (0-100%) show that both types of sites are active, although moderately, toward H2O2 reduction. In contrast, N-doped carbons free of Fe and Fe particles exposed to the electrolyte are inactive. When catalyzing the ORR, FeNxCy moieties are more selective than Fe particles encapsulated in N-doped carbon. These novel insights offer rational approaches for more selective and therefore more durable Fe-N-C catalysts.",fuel cells; heterogeneous catalysis; hydrogen peroxide; iron; oxygen reduction reaction,NITROGEN-DOPED CARBON; IRON-BASED CATALYSTS; FE-57 MOSSBAUER-SPECTROSCOPY; PEM FUEL-CELL; OXYGEN REDUCTION; METAL ELECTROCATALYST; IDENTIFICATION; COORDINATION; NANOPARTICLES; CHEMISTRY,fuel cells;heterogeneous catalysis;hydrogen peroxide;iron;oxygen reduction reaction;NITROGEN-DOPED CARBON;IRON-BASED CATALYSTS;FE-57 MOSSBAUER-SPECTROSCOPY;PEM FUEL-CELL;OXYGEN REDUCTION;METAL ELECTROCATALYST;IDENTIFICATION;COORDINATION;NANOPARTICLES;CHEMISTRY,chchoi@gist.ac.kr; frederic.jaouen@umontpellier.fr,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,1433-7851,,,28570025,English,ANGEW CHEM INT EDIT,Article,WoS,Chemistry,WOS:000405308500037,,South Korea;France;Germany;United States,gist.ac.kr,Gwangju Inst Sci & Technol;Univ Montpellier;Max Planck Inst Chem Energy Convers;Max Planck Inst Eisenforsch GmbH;Forschungszentrum Julich;Friedrich Alexander Univ Erlangen Nurnberg;Northeastern Univ,"Gwangju Inst Sci & Technol, South Korea;Univ Montpellier, France;Max Planck Inst Chem Energy Convers, Germany;Max Planck Inst Eisenforsch GmbH, Germany;Forschungszentrum Julich, Germany;Friedrich Alexander Univ Erlangen Nurnberg, Germany;Northeastern Univ, United States","Choi, Chang Hyuck; Choi, Won Seok; Kasian, Olga; Mechler, Anna K.; Sougrati, Moulay Tahar; Bruller, Sebastian; Strickland, Kara; Jia, Qingying; Mukerjee, Sanjeev; Mayrhofer, Karl J. J.; Jaouen, Frederic"
"Chu, Y., Cheng, Y., Wang, P., Bai, J., Guan, X., Wang, S., Lan, C., Wu, H., Shi, Z., Zhu, S., Liu, W., Liu, C., Xiao, M., Xing, W.",Unraveling the potential-dependent degradation mechanism in Fe-N-C catalysts for oxygen reduction reaction,2025,Science China Chemistry,68,4,,1541,1549,,17,10.1007/s11426-024-2359-9,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105001472129&doi=10.1007%2Fs11426-024-2359-9&partnerID=40&md5=e6fbbed83807db42ecc2a12b20b651bd,"State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China","Chu, Yuyi, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Cheng, Yuqing, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Wang, Pengbo, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Bai, Jingsen, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Guan, Xin, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Wang, Shuo, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Lan, Chang, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Wu, Hongxiang, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Shi, Zhaoping, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Zhu, Siyuan, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Liu, Wei, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China; Liu, Changpeng, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Xiao, Meiling, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China; Xing, Wei, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute Of Applied Chemistry, Chinese Academy Of Sciences, Changchun, Jilin, China, School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China","Fe-N-C is hailed as the most promising candidate for replacing costly platinum-based catalysts for proton-exchange membrane fuel cells (PEMFCs) owing to their impressive catalytic activity and low cost. However, the durability of Fe-N-C catalysts remains a major challenge, primarily due to an insufficient understanding of their degradation mechanisms. In this study, we monitor the real-time changes in the electrode during the oxygen reduction reaction (ORR), shedding light on the potential-dependent degradation mechanisms inherent to Fe-N-C catalysts. Utilizing in-situ differential electrochemical mass spectroscopy, we identify three distinct potential regions with varying degrees of performance loss, notably observing carbon corrosion signals at low potentials. Theoretical calculations and fluorescence probe experiments corroborate that degradation mechanisms at high potentials are primarily driven by strong oxidative potentials that overcome the carbon oxidation energy barrier, whereas the degradation at low potentials is predominantly caused by the high concentrations of reactive oxygen species (ROS) generated during the ORR. The potential-dependent carbon corrosion consequently leads to a similar dependence of demetallation of active sites on the working potential. This study offers a comprehensive understanding of the intrinsic interrelations among various degradation mechanisms, thus paving the way for enhancing the durability of Fe-N-C catalysts in PEMFC applications. © Science China Press 2024.",carbon oxidation; Fe-N-C catalysts; oxygen reduction reaction; reactive oxygen species; stability mechanism,Carbon sequestration; Degradation; Electrochemical corrosion; Oxygen reduction reaction; Carbon corrosion; Carbon oxidation; Degradation mechanism; Fe–N–C catalyst; Potential-dependent; Proton-exchange membranes fuel cells; Reactive oxygen species; Stability mechanisms; ]+ catalyst; Electrolytic reduction,carbon oxidation;Fe-N-C catalysts;oxygen reduction reaction;reactive oxygen species;stability mechanism;Carbon sequestration;Degradation;Electrochemical corrosion;Carbon corrosion;Degradation mechanism;Fe–N–C catalyst;Potential-dependent;Proton-exchange membranes fuel cells;Stability mechanisms;]+ catalyst;Electrolytic reduction,"C. Liu; State Key Laboratory of Electroanalytic Chemistry, Jilin Province Key Laboratory of Low Carbon Chemistry Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: liuchp@ciac.ac.cn; M. Xiao; State Key Laboratory of Electroanalytic Chemistry, Jilin Province Key Laboratory of Low Carbon Chemistry Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: mlxiao@ciac.ac.cn; W. Xing; State Key Laboratory of Electroanalytic Chemistry, Jilin Province Key Laboratory of Low Carbon Chemistry Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; email: xingwei@ciac.ac.cn",,,,,,Science China Press,16747291,,SCCCC,,English,Sci. China Chem.,Article,Scopus,,2-s2.0-105001472129,,China,ciac.ac.cn,,,"Chu, Y.; Cheng, Y.; Wang, P.; Bai, J.; Guan, X.; Wang, S.; Lan, C.; Wu, H.; Shi, Z.; Zhu, S.; Liu, W.; Liu, C.; Xiao, M.; Xing, W."
"Herranz, J., Jaouen, F., Lefevre, M., Kramm, U.I., Proietti, E., Dodelet, J.P., Bogdanoff, P., Fiechter, S., Abs-Wurmbach, I., Bertrand, P., Arruda, T.M., Mukerjee, S.",Unveiling N-Protonation and Anion-Binding Effects on Fe/N/C Catalysts for O2 Reduction in Proton-Exchange-Membrane Fuel Cells,2011,JOURNAL OF PHYSICAL CHEMISTRY C,115,32,,16087,16097,11,335,10.1021/jp2042526,,"[Herranz, Juan; Jaouen, Frederic; Lefevre, Michel; Kramm, Ulrike I.; Proietti, Eric; Dodelet, Jean-Pol] Inst Natl Rech Sci Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada; [Kramm, Ulrike I.; Bogdanoff, Peter; Fiechter, Sebastian] Helmholtz Zentrum Berlin Mat & Energie, Inst Solar Fuels & Energy Storage EI6, D-14109 Berlin, Germany; [Abs-Wurmbach, Irmgard] Tech Univ Berlin, Fac 6, D-13355 Berlin, Germany; [Bertrand, Patrick] Catholic Univ Louvain, Inst Mat Condensee & Nanosci, B-1348 Louvain, Belgium; [Arruda, Thomas M.; Mukerjee, Sanjeev] Northeastern Univ, Dept Chem & Chem Biol, Boston, MA 02115 USA",,"The high cost of proton-exchange-membrane fuel cells would be considerably reduced if platinum-based catalysts were replaced by iron-based substitutes, which have recently demonstrated comparable activity for oxygen reduction but whose cause of activity decay in acidic medium has been elusive. Here, we reveal that the activity of Fe/N/C catalysts prepared through a pyrolysis in NH3 is mostly imparted by acid-resistant FeN4 sites whose turnover frequency for the O-2 reduction can be regulated by fine chemical changes of the catalyst surface. We show that surface N-groups protonate at pH 1 and subsequently bind anions. This results in decreased activity for the O-2 reduction. The anions can be removed chemically or thermally, which restores the activity of acid-resistant FeN4 sites. These results are interpreted as an increased turnover frequency of FeN4 sites when specific surface N-groups protonate. These unprecedented findings provide a new perspective for stabilizing the most active Fe/N/C catalysts known to date.",,POLYMER ELECTROLYTE MEMBRANE; FE-BASED CATALYSTS; OXYGEN REDUCTION; CARBON-BLACK; ELECTROCHEMICAL REDUCTION; ELECTROCATALYTIC ACTIVITY; METAL ELECTROCATALYSTS; PORPHYRIN CATALYSTS; HEAT-TREATMENT; IRON,POLYMER ELECTROLYTE MEMBRANE;FE-BASED CATALYSTS;OXYGEN REDUCTION;CARBON-BLACK;ELECTROCHEMICAL REDUCTION;ELECTROCATALYTIC ACTIVITY;METAL ELECTROCATALYSTS;PORPHYRIN CATALYSTS;HEAT-TREATMENT;IRON,jaouen@emt.inrs.ca,,"1155 16TH ST, NW, WASHINGTON, DC 20036 USA",,,,AMER CHEMICAL SOC,1932-7447,,,24179561,English,J PHYS CHEM C,Article,WoS,Chemistry; Science & Technology - Other Topics; Materials Science,WOS:000293758700046,,Canada;Germany;Belgium;United States,emt.inrs.ca,Inst Natl Rech Sci Energie Mat & Telecommun;Helmholtz Zentrum Berlin Mat & Energie;Tech Univ Berlin;Catholic Univ Louvain;Northeastern Univ,"Inst Natl Rech Sci Energie Mat & Telecommun, Canada;Helmholtz Zentrum Berlin Mat & Energie, Germany;Tech Univ Berlin, Germany;Catholic Univ Louvain, Belgium;Northeastern Univ, United States","Herranz, Juan; Jaouen, Frederic; Lefevre, Michel; Kramm, Ulrike I.; Proietti, Eric; Dodelet, Jean-Pol; Bogdanoff, Peter; Fiechter, Sebastian; Abs-Wurmbach, Irmgard; Bertrand, Patrick; Arruda, Thomas M.; Mukerjee, Sanjeev"
"Tan, X., Tahini, H.A., Smith, S.C.",Unveiling the role of carbon oxidation in irreversible degradation of atomically-dispersed FeN4 moieties for proton exchange membrane fuel cells,2021,JOURNAL OF MATERIALS CHEMISTRY A,9,13,,8721,8729,9,20,10.1039/d0ta12105c,,"[Tan, Xin; Tahini, Hassan A.; Smith, Sean C.] Australian Natl Univ, Res Sch Phys, Dept Appl Math, Integrated Mat Design Lab, Canberra, ACT 2601, Australia",,"Nonprecious Fe-N-C catalysts containing atomically-dispersed FeN4 moieties are today the best candidates to replace platinum in proton exchange membrane fuel cell (PEMFC) cathodes. However, limited understanding of problematic operando degradation mechanisms in these catalysts largely impedes widespread commercialization. Recent experiments have shown that there exist durable and non-durable FeN4 sites in Fe-N-C catalysts for PEMFCs [J. Li et al., Nat. Catal., 2021, 4, 10-19]. Yet, the identification of which FeN4 sites are durable and which are not - and why - remains unclear. Using first-principles density functional theory (DFT) computations, we investigated the irreversible degradation of FeN4 catalysts at the atomic level, caused by Fe de-metalation and chemical oxidation of carbon via a proposed new carbon oxidation pathway. Our computational results show that oxidation of surface carbon next to FeN4 moieties at interior sites is essentially reversible under operando electrochemical conditions; whereas oxidation of carbon next to FeN4 moieties at the edge sites leads to accelerated Fe de-metalation, inducing irreversible degradation of FeN4 catalysts. From amongst six FeN4 moieties established experimentally, we identify three durable and three non-durable configurations. This work resolves the controversy as to which FeN4 moieties are durable under PEMFC operando conditions and provides a deeper understanding of the irreversible degradation mechanism of FeN4 catalysts in acidic media, furnishing a practical guide for rational design of FeN4 catalysts with long-term durability.",,,,Xin.Tan@anu.edu.au; Sean.Smith@anu.edu.au,,"THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND",,,,ROYAL SOC CHEMISTRY,2050-7488,,,,English,J MATER CHEM A,Article,WoS,Chemistry; Energy & Fuels; Materials Science,WOS:000637555800052,2-s2.0-85103740065,Australia,anu.edu.au,Australian Natl Univ,"Australian Natl Univ, Australia","Tan, Xin; Tahini, Hassan A.; Smith, Sean C."
"Park, M.J., Kwon, S.J., Park, H.S., Yoo, S.J., Jang, J.H., Kim, H.J., Nam, S.W., Kim, J.Y.",Urchin-shaped hollow iron-nitrogen-doped carbon microspheres as high-performance electrocatalysts for oxygen reduction,2017,Journal of the Electrochemical Society,164,4,,F224,F228,,12,10.1149/2.0291704jes,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85020686389&doi=10.1149%2F2.0291704jes&partnerID=40&md5=e2b02711e1d8bf07ecd304fd7ddf9e8a,"Fuel Cell Research Center, Korea Institute of Science and Technology, Seoul, South Korea; Nanophotonics Research Center, Korea Institute of Science and Technology, Seoul, South Korea","Park, Min-jung, Fuel Cell Research Center, Korea Institute of Science and Technology, Seoul, South Korea; Kwon, Seokjoon, Nanophotonics Research Center, Korea Institute of Science and Technology, Seoul, South Korea; Park, Hyunseo, Fuel Cell Research Center, Korea Institute of Science and Technology, Seoul, South Korea; Yoo, Sung Jong, Fuel Cell Research Center, Korea Institute of Science and Technology, Seoul, South Korea; Jang, Jonghyun Hyung, Fuel Cell Research Center, Korea Institute of Science and Technology, Seoul, South Korea; Kim, Hyoung-juhn, Fuel Cell Research Center, Korea Institute of Science and Technology, Seoul, South Korea; Nam, Suk Woo, Fuel Cell Research Center, Korea Institute of Science and Technology, Seoul, South Korea; Kim, Jin-Young, Fuel Cell Research Center, Korea Institute of Science and Technology, Seoul, South Korea","Oxygen reduction reaction (ORR) kinetics are enhanced in alkaline media. Hence, alternative non-platinum (Pt)-group metal electrocatalysts have been investigated extensively in this medium to compete with Pt in terms of performance and durability. Among various non-Pt catalysts, one of the most popular class of electrocatalysts is iron- and nitrogen-doped carbon-based (Fe-N-C) by the high electrocatalytic activity and selectivity in ORR. However, the inherent catalytic reactivity of such non-Pt electrocatalysts remains inferior to that of state-of-the-art Pt electrocatalysts. Here, we explore the ORR of hollow and urchin-like, three-dimensional (3D) nanostructured Fe-N-Cs prepared via polymerization-induced self-assembly of aniline followed by carbonization. The resulting Fe-N-Cs consist of a hollow microsphere framework coupled with nanorod bundles, and exhibit large surface areas (874 m2g-1), hierarchical cavities, and excellent electrical conductivities (0.63 Scm-1) as electrodes. They are of particular interest as oxygen reduction electrocatalyst for proton exchange membrane fuel cells (PEMFCs). These unique features, which enhance electrocatalytic efficiency, are attributed to efficient mass- and electro-transport ORR kinetics. Electrochemical experiments reveal improved onset (ca. 1.04 V) and half-wave potentials (ca. 0.9 V), which is comparable to those of commercial Pt electrocatalysts. The 3D hierarchical porous network with high interdigitation of well-dispersed nanorod building blocks is thought to be key to facilitating the ORR reaction. © 2017 The Electrochemical Society. All rights reserved.",,C (programming language); Carbonization; Catalyst selectivity; Cesium; Doping (additives); Electrolysis; Electrolytic reduction; Fuel cells; Microspheres; Nanorods; Nitrogen; Oxygen; Platinum; Platinum metals; Proton exchange membrane fuel cells (PEMFC); Reaction kinetics; Reduction; Self assembly; Electrical conductivity; Electrocatalytic activity; Electrocatalytic efficiencies; Electrochemical experiments; Nitrogen-doped carbons; Non-Pt electrocatalysts; Oxygen reduction reaction kinetics; Proton exchange membrane fuel cell (PEMFCs); Electrocatalysts,C (programming language);Carbonization;Catalyst selectivity;Cesium;Doping (additives);Electrolysis;Electrolytic reduction;Fuel cells;Microspheres;Nanorods;Nitrogen;Oxygen;Platinum;Platinum metals;Proton exchange membrane fuel cells (PEMFC);Reaction kinetics;Reduction;Self assembly;Electrical conductivity;Electrocatalytic activity;Electrocatalytic efficiencies;Electrochemical experiments;Nitrogen-doped carbons;Non-Pt electrocatalysts;Oxygen reduction reaction kinetics;Proton exchange membrane fuel cell (PEMFCs);Electrocatalysts,,,,,,,Electrochemical Society Inc. ecs@electrochem.org,00134651,,JESOA,,English,J Electrochem Soc,Article,Scopus,,2-s2.0-85020686389,,South Korea,No email,,,"Park, M.J.; Kwon, S.J.; Park, H.S.; Yoo, S.J.; Jang, J.H.; Kim, H.-J.; Nam, S.W.; Kim, J.Y."
"Epping-Martin, K., Kopasz, J.P., Benjamin, T.G., Garland, N.L., Podolski, W.F., Peterson, D.R., Kleen, G., Papageorgopoulos, D., Ho, D.L.",US Department of Energy Polymer Electrolyte Membrane Fuel Cell Catalyst Development Activities,2011,POLYMER ELECTROLYTE FUEL CELLS 11,41,1,,917,932,16,3,10.1149/1.3635626,,"[Epping-Martin, K.; Garland, N. L.; Peterson, D. R.; Kleen, G.; Papageorgopoulos, D.; Ho, D. L.] US DOE, Washington, DC 20585 USA; [Kopasz, J. P.; Podolski, W. F.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA",,"The U.S. Department of Energy is supporting the research, development, and deployment of all types of fuel cells for transportation, material handling, portable power, back-up power, stationary power, and combined heat and power applications. A major focus of this support is polymer electrolyte membrane fuel cells. Key issues inhibiting their widespread penetration and commercialization of fuel cells are performance, durability, and cost and a key component is electrode technology including supports and catalysts. The approaches to improvement in electrode technology include alloys, core/shell structures, thin continuous catalyst films, non-precious metal catalysts, and alternative supports. Major progress has been realized recently. This paper provides an overview of DOE-funded advances and status.",,OXYGEN REDUCTION REACTION; ELECTROCATALYSTS; STABILITY; SURFACES,OXYGEN REDUCTION REACTION;ELECTROCATALYSTS;STABILITY;SURFACES,,"Gasteiger, HA; Weber, A; Narayanan, SR; Jones, D; Strasser, P; SwiderLyons, K; Buchi, FN; Shirvanian, P; Nakagawa, H; Uchida, H; Mukerjee, S; Schmidt, TJ; Ramani, V; Fuller, T; Edmundson, M; Lamy, C; Mantz, R","65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA",11th Polymer Electrolyte Fuel Cell Symposium (PEFC) Under the Auspices of the 220th Meeting of the ECS,"Boston, MA","OCT, 2011",ELECTROCHEMICAL SOC INC,1938-5862,978-1-60768-255-4; 978-1-60768-254-7,,,English,ECS TRANSACTIONS,Proceedings Paper,WoS,Electrochemistry; Energy & Fuels; Polymer Science,WOS:000309598800088,,United States,No email,US DOE;Argonne Natl Lab,"US DOE, United States;Argonne Natl Lab, United States","Epping-Martin, K.; Kopasz, J. P.; Benjamin, T. G.; Garland, N. L.; Podolski, W. F.; Peterson, D. R.; Kleen, G.; Papageorgopoulos, D.; Ho, D. L."
"Benjamin, T.G., Epping-Martin, K., Garland, N.L., Ho, D.L., Kopasz, J.P., Papageorgopoulos, D.C., Podolski, W.F.",U.S. department of energy polymer electrolyte membrane fuel cell catalyst development activities,2013,ECS Transactions,50,2,,1315,1320,,1,10.1149/05002.1315ecst,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84885720826&doi=10.1149%2F05002.1315ecst&partnerID=40&md5=4f0454d32766b77524267194be6d8c9b,"Argonne National Laboratory, Lemont, IL, United States; United States Department of Energy, Washington, D.C., DC, United States","Benjamin, Thomas G., Argonne National Laboratory, Lemont, IL, United States; Epping-Martin, Kathi, United States Department of Energy, Washington, D.C., DC, United States; Garland, Nancy L., United States Department of Energy, Washington, D.C., DC, United States; Ho, Donna Lee, United States Department of Energy, Washington, D.C., DC, United States; Kopasz, John P., Argonne National Laboratory, Lemont, IL, United States; Papageorgopoulos, Dimitrios C., United States Department of Energy, Washington, D.C., DC, United States; Podolski, Walter F., Argonne National Laboratory, Lemont, IL, United States","The U.S. Department of Energy's (DOE's) Fuel Cell Technologies Program supports research and development of electrocatalysts for polymer electrolyte membrane fuel cells. R&D projects address cost, durability, and performance with the goal of reducing or eliminating platinum group metals from the catalysts. The projects' strategies include: ultra-low platinum loading, platinum alloy catalysts, novel architectures, and non-PGM catalysts. The deposition of Pt monolayers on Pd nanoparticles was improved by displacement of Pd by Pt; the catalyst activity is comparable to those fabricated using Cu underpotential deposition. The specific activity of nanoparticles can be improved by ∼4x using ternary alloys. Catalysts, prepared with excess non-noble elements that are removed during processing, i.e., dealloying, attain a mass activity exceeding that of commercial catalysts. Extended catalyst surfaces on nanotubes, nanowires, and metal oxides have been developed. Results from DOE's catalyst projects will be discussed in detail. © The Electrochemical Society.",,Catalyst activity; Dealloying; Deposition; Electrocatalysts; Nanoparticles; Palladium; Platinum alloys; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Ternary alloys; Yarn; Development activity; Fuel cell technologies; Platinum alloy catalyst; Platinum group metals; Polymer electrolyte membranes; Research and development; U.S. Department of Energy; Underpotential deposition; Solid electrolytes,Catalyst activity;Dealloying;Deposition;Electrocatalysts;Nanoparticles;Palladium;Platinum alloys;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Ternary alloys;Yarn;Development activity;Fuel cell technologies;Platinum alloy catalyst;Platinum group metals;Polymer electrolyte membranes;Research and development;U.S. Department of Energy;Underpotential deposition;Solid electrolytes,,,,"12th Polymer Electrolyte Fuel Cell Symposium, PEFC 2012 - 222nd ECS Meeting",,,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-84885720826,,United States,No email,,,"Benjamin, T.G.; Epping-Martin, K.; Garland, N.L.; Ho, D.L.; Kopasz, J.P.; Papageorgopoulos, D.C.; Podolski, W.F."
"Epping-Martin, K., Kopasz, J.P., Benjamin, T.G., Garland, N.L., Podolski, W.F., Peterson, D.R., Kleen, G., Papageorgopoulos, D.C., Ho, D.L.",U.S. Department of Energy polymer electrolyte membrane fuel cell catalyst development activities,2011,ECS Transactions,41,1,,917,932,,3,10.1149/1.3635626,https://www.scopus.com/inward/record.uri?eid=2-s2.0-84866406011&doi=10.1149%2F1.3635626&partnerID=40&md5=9b33ea1c4b424d1c5ffd2db41a07b585,"Office of Energy Efficiency and Renewable Energy, Washington, D.C., United States; Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States","Epping-Martin, Kathi, Office of Energy Efficiency and Renewable Energy, Washington, D.C., United States; Kopasz, John P., Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Benjamin, Thomas G., Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Garland, Nancy L., Office of Energy Efficiency and Renewable Energy, Washington, D.C., United States; Podolski, Walter F., Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, United States; Peterson, David R., Office of Energy Efficiency and Renewable Energy, Washington, D.C., United States; Kleen, Gregory J., Office of Energy Efficiency and Renewable Energy, Washington, D.C., United States; Papageorgopoulos, Dimitrios C., Office of Energy Efficiency and Renewable Energy, Washington, D.C., United States; Ho, Donna Lee, Office of Energy Efficiency and Renewable Energy, Washington, D.C., United States","The U.S. Department of Energy is supporting the research, development, and deployment of all types of fuel cells for transportation, material handling, portable power, back-up power, stationary power, and combined heat and power applications. A major focus of this support is polymer electrolyte membrane fuel cells. Key issues inhibiting their widespread penetration and commercialization of fuel cells are performance, durability, and cost and a key component is electrode technology including supports and catalysts. The approaches to improvement in electrode technology include alloys, core/shell structures, thin continuous catalyst films, non-precious metal catalysts, and alternative supports. Major progress has been realized recently. This paper provides an overview of DOE-funded advances and status. © 2011 ECS - The Electrochemical Society.",,Catalyst activity; Catalyst supports; Electrodes; Gas fuel purification; Materials handling; Polyelectrolytes; Precious metal alloys; Proton exchange membrane fuel cells (PEMFC); Combined heat and power applications; Core/shell structure; Development activity; Electrode technology; Fuel cells for transportation; Non-precious metal catalysts; Polymer electrolyte membranes; U.S. Department of Energy; Solid electrolytes,Catalyst activity;Catalyst supports;Electrodes;Gas fuel purification;Materials handling;Polyelectrolytes;Precious metal alloys;Proton exchange membrane fuel cells (PEMFC);Combined heat and power applications;Core/shell structure;Development activity;Electrode technology;Fuel cells for transportation;Non-precious metal catalysts;Polymer electrolyte membranes;U.S. Department of Energy;Solid electrolytes,,,,"11th Polymer Electrolyte Fuel Cell Symposium, PEFC 11 - 220th ECS Meeting",,,Electrochemical Society Inc.,19385862; 19386737,9781607688792; 9781566774383; 9781566776332; 9781607681687; 9781566774963; 9781566776783; 9781615673117; 9781607685975; 9781607687986; 9781623323875,,,English,ECS Transactions,Conference paper,Scopus,,2-s2.0-84866406011,,United States,No email,,,"Epping-Martin, K.; Kopasz, J.P.; Benjamin, T.G.; Garland, N.L.; Podolski, W.F.; Peterson, D.R.; Kleen, G.; Papageorgopoulos, D.C.; Ho, D.L."
"Ho, D.L., Kopasz, J.P., Podolski, W.F., Benjamin, T.G.","U.S. Department of Energy's view of advanced fuel cell catalysts: Citius, altius, fortius",2009,ACS National Meeting Book of Abstracts,,,,,,,0,,https://www.scopus.com/inward/record.uri?eid=2-s2.0-78649794407&partnerID=40&md5=23bdcf78a2148798d00c34e2f244e16f,"and Infrastructure Technologies Program, United States Department of Energy, Washington, D.C., DC, United States; Chemical Technology Division, Argonne National Laboratory, Lemont, IL, United States","Ho, Donna Lee, and Infrastructure Technologies Program, United States Department of Energy, Washington, D.C., DC, United States; Kopasz, John P., Chemical Technology Division, Argonne National Laboratory, Lemont, IL, United States; Podolski, Walter F., Chemical Technology Division, Argonne National Laboratory, Lemont, IL, United States; Benjamin, Thomas G., Chemical Technology Division, Argonne National Laboratory, Lemont, IL, United States","Faster (kinetics), higher (activity), and stronger (more durable) electrocatalysts are the goal of the U.S. Department of Energy's (DOE's) fuel cell catalyst efforts. Electrocatalysts play a large role in determining fuel cell cost and durability, two of the major hurdles to fuel cell commercialization. The DOE has been supporting several approaches to find improved fuel cell catalysts to overcome these hurdles, including: use of platinum (Pt) and other platinum group metal (PGM) alloys to decrease PGM content and increase activity, development of non-precious metal catalysts that maintain performance and durability compared to Pt at a reduced cost, and use of novel support structures to decrease corrosion and increase durability. Recent advances will be discussed including the development of more active alloys that have decreased PGM loading in fuel cell stacks to less than 0.2 grams of PGM per kilowatt, while simultaneously increasing durability. While these advancements have been impressive, PEM fuel cell technology is not yet at the stage where it needs to be to make fuel cell vehicles cost effective. Faster, higher, stronger catalysts are still needed. Cost and durability improvements are still required. New research, development, and demonstration projects to overcome the barriers associated with fuel cell technology which focus specifically on catalysts, degradation mechanisms (including the effects of impurities on fuel cell performance), durability, and transport within the stack will be described. ted with fuel cell technology which focus specifically on catalysts, degradation mechanisms (including the effects of impurities on fuel cell performance), durability, and transport within the stack will be described.",,,,"D. Lee Ho; Hydrogen, Fuel Cells, and Infrastructure Technologies Program, U.S. Department of Energy, Washington, DC 20585-0121, 1000 Independence Avenue SW, United States; email: donna.ho@ee.doe.gov",,,"238th National Meeting and Exposition of the American Chemical Society, ACS 2009",,,,00657727,084127438X; 9780841274082; 0841269556; 0841274088; 9780841269941; 9780841224414; 9780841274266; 9780841269859; 0841274266; 9780841274389,ACSRA,,English,ACS Natl. Meet. Book Abstr.,Conference paper,Scopus,,2-s2.0-78649794407,,United States,ee.doe.gov,,,"Ho, D.L.; Kopasz, J.P.; Podolski, W.F.; Benjamin, T.G."
"Yang, M., Chen, H.B., Yang, D.G., Gao, Y., Li, H.M.",Using nitrogen-rich polymeric network and iron(II) acetate as precursors to synthesize highly efficient electrocatalyst for oxygen reduction reaction in alkaline media,2016,JOURNAL OF POWER SOURCES,307,,,152,159,8,26,10.1016/j.jpowsour.2015.12.110,,"[Yang, Mei; Chen, Hongbiao; Yang, Duanguang; Gao, Yong; Li, Huaming] Xiangtan Univ, Coll Chem, Xiangtan 411105, Hunan, Peoples R China; [Li, Huaming] Xiangtan Univ, Coll Hunan Prov, Key Lab Polymer Mat & Applicat Technol Hunan Prov, Xiangtan 411105, Hunan, Peoples R China; [Li, Huaming] Xiangtan Univ, Coll Hunan Prov, Key Lab Adv Funct Polymer Mat, Xiangtan 411105, Hunan, Peoples R China",,"Carbon-supported transition metal/nitrogen (M-N/C) materials are considered as one of the most promising electrocatalysts for the oxygen reduction reaction (ORR) owing to their high ORR electrocatalytic activity, long-term stability, and excellent methanol tolerance. So far only a few examples of such catalysts are prepared from N-containing polymers. Herein, we report a novel Fe-N/C catalyst using a nitrogen-rich polymeric network and iron(II) acetate as the precursors. The porous polymeric network is fabricated by one-step Friedel Crafts reaction of a low-cost cross-linker, formaldehyde dimethyl acetal, with 2,4,6-tripyrrol-1,3,5-triazine. Compared to commercial Pt/C catalyst, the as-prepared Fe-N/C electrocatalyst exhibits superior ORR activity in alkaline electrolyte, and comparable ORR activity in acidic medium. The results obtained are significant for the development of new Fe-N/C electrocatalysts for fuel cells. (C) 2015 Elsevier B.V. All rights reserved.",Oxygen reduction reaction; Polymeric networks; Dope; Electrocatalysts; Fuel cells,PEM FUEL-CELLS; METAL-FREE ELECTROCATALYSTS; DOPED CARBON CATALYST; FE-N/C; POLYANILINE; PYROLYSIS; NANOTUBES; GRAPHENE; NANOCRYSTALS; COMPOSITE,Oxygen reduction reaction;Polymeric networks;Dope;Electrocatalysts;Fuel cells;PEM FUEL-CELLS;METAL-FREE ELECTROCATALYSTS;DOPED CARBON CATALYST;FE-N/C;POLYANILINE;PYROLYSIS;NANOTUBES;GRAPHENE;NANOCRYSTALS;COMPOSITE,chhb606@163.com; lihuaming@xtu.edu.cn,,"RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS",,,,ELSEVIER,0378-7753,,,,English,J POWER SOURCES,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels; Materials Science,WOS:000370884000021,,China,163.com,Xiangtan Univ,"Xiangtan Univ, China","Yang, Mei; Chen, Hongbiao; Yang, Duanguang; Gao, Yong; Li, Huaming"
"Osmieri, L., Wang, G., Cetinbas, F.C., Khandavalli, S., Park, J.H., Medina, S., Mauger, S.A., Ulsh, M., Pylypenko, S., Myers, D.J., Neyerlin, K.C.","Utilizing ink composition to tune bulk-electrode gas transport, performance, and operational robustness for a Fe–N–C catalyst in polymer electrolyte fuel cell",2020,Nano Energy,75,,104943,,,,79,10.1016/j.nanoen.2020.104943,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85086593050&doi=10.1016%2Fj.nanoen.2020.104943&partnerID=40&md5=9cc309e7e68bac82c9e6b0cb806946e6,"National Renewable Energy Laboratory, Golden, CO, United States; Argonne National Laboratory, Lemont, IL, United States; Department of Chemistry, Colorado School of Mines, Golden, CO, United States","Osmieri, Luigi, National Renewable Energy Laboratory, Golden, CO, United States; Wang, Guanxiong, National Renewable Energy Laboratory, Golden, CO, United States; Cetinbas, Firat C., Argonne National Laboratory, Lemont, IL, United States; Khandavalli, Sunilkumar, National Renewable Energy Laboratory, Golden, CO, United States; Park, Jaehyung, Argonne National Laboratory, Lemont, IL, United States; Medina, Samantha, Department of Chemistry, Colorado School of Mines, Golden, CO, United States; Mauger, Scott A., National Renewable Energy Laboratory, Golden, CO, United States; Ulsh, Michael J., National Renewable Energy Laboratory, Golden, CO, United States; Pylypenko, Svitlana, Department of Chemistry, Colorado School of Mines, Golden, CO, United States; Myers, Deborah J., Argonne National Laboratory, Lemont, IL, United States; Neyerlin, Kenneth C., National Renewable Energy Laboratory, Golden, CO, United States","With lower site density and turnover frequency, platinum group metal (PGM)-free catalysts based electrodes are often greater than 50 μm thick in order to increase performance across the fuel cell operating range. Consequently, PGM-free electrodes have an additional bulk electrode transport resistance beyond the local or aggregate level transport in thin platinum-based electrodes. In parallel to the development of more active and durable PGM-free catalysts, advancements in understanding the interplay between PGM-free electrode fabrication, bulk-electrode transport, proton conductivity and performance are needed. Here, the relationship between ionic and gas phase transport through the electrode thickness is modified by adjusting electrocatalyst and ionomer flocculation/interaction at the ink level. The influence of the ink composition (water/n-propanol content) is examined via various in-situ electrochemical and ex-situ characterization techniques and the resulting electrode structure/performance relationship contrasted with electrode performance robustness across a range of relative humidity (RH). For the electrocatalyst examined here, a water-rich (82 wt% H<inf>2</inf>O) ink formulation was favorable for operation at high RH due to improved molecular diffusion through larger electrode pores. In contrast, the improved interactions between ionomer and electrocatalyst enabled a more robust electrode and higher performance during low RH operation for the 50 wt% H<inf>2</inf>O content ink. © 2020 Elsevier Ltd",Ink composition; Ionic resistance; Ionomer distribution; Mass transport resistance; Nano-CT; PGM-Free catalyst,Electrocatalysts; Ionomers; Platinum; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Electrode fabrication; Electrode performance; Electrode structure; Electrode thickness; Molecular diffusion; Platinum group metals; Polymer electrolyte fuel cells; Transport resistance; Electrochemical electrodes,Ink composition;Ionic resistance;Ionomer distribution;Mass transport resistance;Nano-CT;PGM-Free catalyst;Electrocatalysts;Ionomers;Platinum;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Electrode fabrication;Electrode performance;Electrode structure;Electrode thickness;Molecular diffusion;Platinum group metals;Polymer electrolyte fuel cells;Transport resistance;Electrochemical electrodes,"K.C. Neyerlin; National Renewable Energy Laboratory, Golden, United States; email: kenneth.neyerlin@nrel.gov",,,,,,Elsevier Ltd,22112855,,,,English,Nano Energy,Article,Scopus,,2-s2.0-85086593050,,United States,nrel.gov,,,"Osmieri, L.; Wang, G.; Cetinbas, F.C.; Khandavalli, S.; Park, J.H.; Medina, S.; Mauger, S.A.; Ulsh, M.; Pylypenko, S.; Myers, D.J.; Neyerlin, K.C."
"Mun, Y., Lee, S., Kim, K., Kim, S., Lee, S., Han, J.W., Lee, J.",Versatile Strategy for Tuning ORR Activity of a Single Fe-N4 Site by Controlling Electron-Withdrawing/Donating Properties of a Carbon Plane,2019,Journal of the American Chemical Society,141,15,,6254,6262,,646,10.1021/jacs.8b13543,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85064339361&doi=10.1021%2Fjacs.8b13543&partnerID=40&md5=9dec1d098f6315f1e52c5c0ca8903f79,"Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea","Mun, Yeongdong, Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; Lee, Seonggyu, Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; Kim, Kyeounghak, Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; Kim, Seongbeen, Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; Lee, Seunghyun, Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; Han, Jeongwoo, Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Gyeongsangbuk-do, South Korea; Lee, Jinwoo, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea","Replacement of Pt-based oxygen reduction reaction (ORR) catalysts with non-precious metal catalysts (NPMCs) such as Fe/N/C is one of the most important issues in the commercialization of proton exchange membrane fuel cells (PEMFCs). Despite numerous studies on Fe/N/C catalysts, a fundamental study on the development of a versatile strategy is still required for tuning the kinetic activity of a single Fe-N<inf>4</inf> site. Herein, we report a new and intuitive design strategy for tuning and enhancing the kinetic activity of a single Fe-N<inf>4</inf> site by controlling electron-withdrawing/donating properties of a carbon plane with the incorporation of sulfur functionalities. The effect of electron-withdrawing/donating functionalities was elucidated by experimentation and theoretical calculations. Finally, the introduction of an oxidized sulfur functionality decreases the d-band center of iron by withdrawing electrons, thereby facilitating ORR at the Fe-N<inf>4</inf> site by lowering the intermediate adsorption energy. Furthermore, this strategy can enhance ORR activity without a decrease in the stability of the catalyst. This simple and straightforward approach can be a cornerstone to develop optimum NPMCs for application in the cathodes of PEMFCs. © 2019 American Chemical Society.",,Carbon; Catalysts; Electrolytic reduction; Electrons; Fuel cells; Iron compounds; Sulfur; Tuning; Adsorption energies; Electronwithdrawing; Fundamental studies; Non-precious metal catalysts; Oxygen reduction reaction; Proton exchange membrane fuel cell (PEMFCs); Sulfur functionalities; Theoretical calculations; Proton exchange membrane fuel cells (PEMFC); carbon; iron; nitrogen; sulfur; adsorption; Article; catalyst; controlled study; electron transport; oxidation reduction reaction; particle size,Carbon;Catalysts;Electrolytic reduction;Electrons;Fuel cells;Iron compounds;Sulfur;Tuning;Adsorption energies;Electronwithdrawing;Fundamental studies;Non-precious metal catalysts;Oxygen reduction reaction;Proton exchange membrane fuel cell (PEMFCs);Sulfur functionalities;Theoretical calculations;Proton exchange membrane fuel cells (PEMFC);iron;nitrogen;adsorption;Article;catalyst;controlled study;electron transport;oxidation reduction reaction;particle size,"J.W. Han; Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Nam-gu, Pohang, Gyeongbuk, 77 Cheongam-Ro, 37673, South Korea; email: jwhan@postech.ac.kr",,,,,,American Chemical Society service@acs.org,00027863,,JACSA,30920818,English,J. Am. Chem. Soc.,Article,Scopus,,2-s2.0-85064339361,,South Korea,postech.ac.kr,,,"Mun, Y.; Lee, S.; Kim, K.; Kim, S.; Lee, S.; Han, J.W.; Lee, J."
"Huang, D., Geng, L., Lu, Q.","Wettability, Adhesion and Mass Transfer of the Active Site within Fe-N-C Catalyst for Proton Exchange Membrane Fuel Cells",2025,Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University,59,10,,148,159,,0,10.7652/xjtuxb202510014,https://www.scopus.com/inward/record.uri?eid=2-s2.0-105019502541&doi=10.7652%2Fxjtuxb202510014&partnerID=40&md5=b68a3bca4409a806b2b14ea6cc167c2d,"School of Energy and Electrical Engineering, Chang'an University, Xi'an, Shaanxi, China; School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, China","Huang, Dong, School of Energy and Electrical Engineering, Chang'an University, Xi'an, Shaanxi, China; Geng, Limin, School of Energy and Electrical Engineering, Chang'an University, Xi'an, Shaanxi, China; Lu, Qiang, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, China","To investigate the stability and mass transfer performance of the three-phase interface in the cathode catalytic layer of proton exchange membrane fuel cells （PEMFCs） using non precious metal Fe-N-C catalysts,a series of Fe-N-C catalysts are synthesized via pyrolysis at temperatures ranging from 800—1 200 ℃, using zeolitic imidazolate framework （ZIF-8）as a precursor with the introduction of graphene oxide. The optimal catalyst for oxygen reduction reaction activity is selected through electrochemical testing and morphological characterization , and its representative active site, Fe<inf>3</inf> N,is analyzed. Molecular dynamics simulations are employed to explore the mass transfer processes within the three-phase interface of the cathode catalytic layer containing Fe<inf>3</inf> N,as well as the wettability of the active site surface, which determine the structural stability, and its adhesion to the ionomer. The results show that the Fe-N-C-1 000 catalyst obtained at 1 000 ℃ exhibits the best catalytic activity, with a limiting current density of 5.18 mA/cm2, a half-wave potential of 0.86 V, and a 4-electron reaction pathway. Fe-N-C-1 000 inherits the dodecahedral structure of ZIF-8 and contains a large number of mesopores with an average pore size of approximately 3.9 nm, with Fe<inf>3</inf>N as the representative active site. At 298 K and 358 K, the Fe<inf>3</inf>N active site surface demonstrates excellent hydrophilicity,and its adhesion to Nafion ionomer is stronger than that of Pt, regardless of whether the surface is flat or nanoparticle structured. Within the three-phase interface containing Fe<inf>3</inf>N, the diffusion coefficients of H<inf>3</inf> O+ and O<inf>2</inf> are significantly higher than those in the Pt/C three-phase interface. Additionally, Fe<inf>3</inf>N nanoparticles exhibit stronger adsorption capabilities for H<inf>3</inf> O+ and O<inf>2</inf>. This study provides valuable insights for the screening and molecular-scale performance evaluation of Fe-N-C catalyst active sites. © 2025, Xi'an Jiaotong University . All rights reserved.",adhesivity; diffusion coefficient; fe-N-C catalyst; molecular dynamics simulation; oxygen reduction reaction; proton exchange membrane fuel cells; three-phase interface,Adhesion; Catalyst activity; Cathodes; Diffusion; Electrolytic reduction; Gas fuel purification; Hydrophilicity; Iron compounds; Molecular oxygen; Oxygen reduction reaction; Phase interfaces; Platinum; Platinum compounds; Pore size; Reaction kinetics; Stability; Adhesivity; Dynamics simulation; Fe-N-C catalyst; Molecular dynamic simulation; Proton-exchange membranes fuel cells; Three phase; Three phasis; Three-phase interface; ]+ catalyst; Molecular dynamics,adhesivity;diffusion coefficient;fe-N-C catalyst;molecular dynamics simulation;oxygen reduction reaction;proton exchange membrane fuel cells;three-phase interface;Adhesion;Catalyst activity;Cathodes;Diffusion;Electrolytic reduction;Gas fuel purification;Hydrophilicity;Iron compounds;Molecular oxygen;Phase interfaces;Platinum;Platinum compounds;Pore size;Reaction kinetics;Stability;Dynamics simulation;Molecular dynamic simulation;Proton-exchange membranes fuel cells;Three phase;Three phasis;]+ catalyst;Molecular dynamics,,,,,,,Xi'an Jiaotong University,0253987X,,HCTPD,,Chinese,Hsi An Chiao Tung Ta Hsueh,Article,Scopus,,2-s2.0-105019502541,,China,No email,,,"Huang, D.; Geng, L.; Lu, Q."
"Muller-Hulstede, J., Schmies, H., Schonvogel, D., Meyer, Q., Nie, Y., Zhao, C., Wagner, P., Wark, M.",What determines the stability of Fe-N-C catalysts in HT-PEMFCs?,2024,INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,50,,,921,930,10,16,10.1016/j.ijhydene.2023.09.190,,"[Mueller-Huelstede, Julia; Schmies, Henrike; Schonvogel, Dana; Wagner, Peter] German Aerosp Ctr DLR, Inst Engn Thermodynam, Carl von Ossietzky Str 15, D-26129 Oldenburg, Germany; [Meyer, Quentin; Nie, Yan; Zhao, Chuan] Univ New South Wales, Sch Chem, Sydney, NSW 2052, Australia; [Wark, Michael] Carl von Ossietzky Univ Oldenburg, Inst Chem, Carl von Ossietzky Str 9-11, D-26129 Oldenburg, Germany",,"Fe-N-C catalysts are an attractive low-cost alternative to Pt for the oxygen reduction reaction (ORR) in high-temperature proton exchange membrane fuel cells (HT-PEMFCs) as they are less sensitive to phosphate poisoning, but they suffer from poor stability and unclear degradation mechanisms. In this study, the activation and degradation mechanisms of HT-PEMFCs with several classes of Fe-N-Cs operating for 90 h are identified using a combination of operando electrochemical and post-mortem physical analysis. While simultaneous activation in terms of accelerated ORR processes takes place by acid redistribution, the degradation of the catalyst leads to drastic performance loss (-27%) within the first 24 h. Carbon corrosion has a lower impact and the strongest degradation is attributed to active site deactivation e.g. by transformation to inactive nanoparticles or by site loss. This study helps to understand the degradation of Fe-N-Cs in HT-PEMFC and points to the necessary and inevitable modification of single-atom catalysts.(c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.",PGM-free catalyst; HT-PEMFC; Stability; Fe-N-C,METAL-FREE CATALYSTS; RELAXATION-TIMES; OXYGEN REDUCTION; IMPEDANCE,PGM-free catalyst;HT-PEMFC;Stability;Fe-N-C;METAL-FREE CATALYSTS;RELAXATION-TIMES;OXYGEN REDUCTION;IMPEDANCE,henrike.schmies@dlr.de,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0360-3199,,,,English,INT J HYDROGEN ENERG,Article,WoS,Chemistry; Electrochemistry; Energy & Fuels,WOS:001135494700001,2-s2.0-85173223665,Germany;Australia,dlr.de,German Aerosp Ctr DLR;Univ New South Wales;Carl von Ossietzky Univ Oldenburg,"German Aerosp Ctr DLR, Germany;Univ New South Wales, Australia;Carl von Ossietzky Univ Oldenburg, Germany","Mueller-Huelstede, Julia; Schmies, Henrike; Schonvogel, Dana; Meyer, Quentin; Nie, Yan; Zhao, Chuan; Wagner, Peter; Wark, Michael"
"Xu, Y., Dzara, M.J., Kabir, S., Pylypenko, S., Neyerlin, K.C., Zakutayev, A.",X-ray photoelectron spectroscopy and rotating disk electrode measurements of smooth sputtered Fe-N-C films,2020,Applied Surface Science,515,,146012,,,,18,10.1016/j.apsusc.2020.146012,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85081888395&doi=10.1016%2Fj.apsusc.2020.146012&partnerID=40&md5=7954aa4c7774598d8d015ab65b20b9e8,"National Renewable Energy Laboratory, Golden, CO, United States; Colorado School of Mines, Golden, CO, United States","Xu, Yun, National Renewable Energy Laboratory, Golden, CO, United States; Dzara, Michael J., Colorado School of Mines, Golden, CO, United States; Kabir, Sadia A., National Renewable Energy Laboratory, Golden, CO, United States; Pylypenko, Svitlana, National Renewable Energy Laboratory, Golden, CO, United States, Colorado School of Mines, Golden, CO, United States; Neyerlin, Kenneth C., National Renewable Energy Laboratory, Golden, CO, United States; Zakutayev, Andriy, National Renewable Energy Laboratory, Golden, CO, United States","Electrocatalysts for the oxygen reduction reaction (ORR) based on complexes of iron and nitrogen in a carbon matrix (Fe-N-C) are a promising alternative to platinum group metal (PGM) based catalysts in polymer electrolyte membrane (PEM) fuel cells. Further improvements of Fe-N-C catalysts would benefit from model thin film studies of activity and stability of catalytic sites, but synthesis of Fe-N-C model thin films is challenging. Here we report on synthesis and characterization of Fe-N-C thin films produced by co-sputtering iron and carbon in a reactive nitrogen atmosphere onto removable glassy carbon rotating disk electrode (RDE) tips. Scanning electron microscopy (SEM) measurements indicate that the Fe-N-C films deposited at high temperature are smoother than the films annealed at high temperature. Electrocatalytic activity measured on the thin Fe-N-C films is greater for both high-temperature samples than for the room-temperature sample. From the analysis of X-ray photoelectron spectroscopy (XPS) data, exposure of the films to high temperatures results in increased graphitization of the carbon within the Fe-N-C films, and increased relative amount of graphitic and hydrogenated nitrogen species. Overall, the results of this study demonstrate the feasibility of a thin film model system approach for studying active sites in PGM-free catalysts. © 2020 Elsevier B.V.",Magnetron sputtering; Model catalysts; Oxygen reduction reaction; Thin films; X-ray photoelectron spectroscopy,Carbon; Carbon films; Catalyst activity; Electrocatalysts; Electrodes; Electrolytic reduction; Iron; Iron compounds; Magnetron sputtering; Nitrogen; Oxygen reduction reaction; Photoelectrons; Photons; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC); Rotating disks; Scanning electron microscopy; Sputter deposition; X ray photoelectron spectroscopy; Electrocatalytic activity; High temperature samples; Model catalysts; Platinum group metals; Polymer electrolyte membranes; Room temperature samples; Rotating disk electrodes; Synthesis and characterizations; Thin films,Magnetron sputtering;Model catalysts;Oxygen reduction reaction;Thin films;X-ray photoelectron spectroscopy;Carbon;Carbon films;Catalyst activity;Electrocatalysts;Electrodes;Electrolytic reduction;Iron;Iron compounds;Nitrogen;Photoelectrons;Photons;Polyelectrolytes;Proton exchange membrane fuel cells (PEMFC);Rotating disks;Scanning electron microscopy;Sputter deposition;X ray photoelectron spectroscopy;Electrocatalytic activity;High temperature samples;Platinum group metals;Polymer electrolyte membranes;Room temperature samples;Rotating disk electrodes;Synthesis and characterizations,"S. Pylypenko; National Renewable Energy Laboratory, Golden, 80401, United States; email: spylypen@mines.edu",,,,,,Elsevier B.V.,01694332,0873392558,ASUSE,,English,Appl Surf Sci,Article,Scopus,,2-s2.0-85081888395,,United States,mines.edu,,,"Xu, Y.; Dzara, M.J.; Kabir, S.; Pylypenko, S.; Neyerlin, K.C.; Zakutayev, A."
"Mohamud, M.A., Bayrakceken, A.B.",Zeolotic imidazolate frameworks (ZIFs) derived porous carbon: A review from crystal growth & green synthesis to oxygen reduction reaction activity,2021,International Journal of Hydrogen Energy,46,68,,33782,33800,,72,10.1016/j.ijhydene.2021.07.196,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85113399078&doi=10.1016%2Fj.ijhydene.2021.07.196&partnerID=40&md5=3c9686142b2decdfb62d8557c7f434ce,"Department of Chemical Engineering, Atatürk Üniversitesi, Erzurum, Erzurum, Turkey; Department of Nanoscience and Nanoengineering, Atatürk Üniversitesi, Erzurum, Erzurum, Turkey","Mohamud, Mohamed Ali, Department of Chemical Engineering, Atatürk Üniversitesi, Erzurum, Erzurum, Turkey; Bayrakçeken, Ayşe, Department of Chemical Engineering, Atatürk Üniversitesi, Erzurum, Erzurum, Turkey, Department of Nanoscience and Nanoengineering, Atatürk Üniversitesi, Erzurum, Erzurum, Turkey","Oxygen reduction reaction (ORR) has slow reaction rate that decrease the chemical conversion productivity in proton exchange membrane fuel cells (PEMFCs) which has to be improved. Noble metals such as Pt nanoparticles supported on carbon (Pt/C) was considered the most essential catalyst in ORR despite their limitations including being rare and expensive, CO poisoning etc. In the past few years, nitrogen doped carbons (N–C) or zeolitic imidazole framework (ZIFs) derived (M-N-C) including single or bimetallic metals take attention due to their outstanding properties such as high surface area, excellent electrical conductivity, cost effectiveness, thermal and chemical stability which were used either as catalyst or supports for noble metal nanoparticles to improve the sluggish ORR in PEMFC cathode. This review briefly outlines conventional crystal preparation and activation of porous carbons derived from ZIFs and their green synthesis methods, followed by modern synthesis methods of nanostructured MNP/MOF composites and recently their ORR activity evaluation in PEMFC. Particular attention was given to the porous carbon supports derived from two kind of frameworks such as ZIF-8 and ZIF-67 which are the most frequently reported ORR electrocatalysts and/or supports in the literature. © 2021",Catalyst support; MOF; Nitrogen doping; ORR; PEMFC; ZIFs,Carbon; Catalyst poisoning; Catalyst supports; Chemical stability; Cost effectiveness; Crystal growth; Electrocatalysts; Electrolytic reduction; Metal nanoparticles; Oxygen; Porous materials; Precious metals; Catalysts support; Green synthesis; Imidazolate; Nitrogen-doping; Oxygen reduction reaction; Porous carbons; Proton-exchange membranes fuel cells; Reaction activity; Zeolotic imidazolate framework; ]+ catalyst; Doping (additives),Catalyst support;MOF;Nitrogen doping;ORR;PEMFC;ZIFs;Carbon;Catalyst poisoning;Catalyst supports;Chemical stability;Cost effectiveness;Crystal growth;Electrocatalysts;Electrolytic reduction;Metal nanoparticles;Oxygen;Porous materials;Precious metals;Catalysts support;Green synthesis;Imidazolate;Nitrogen-doping;Oxygen reduction reaction;Porous carbons;Proton-exchange membranes fuel cells;Reaction activity;Zeolotic imidazolate framework;]+ catalyst;Doping (additives),"A.B. Yurtcan; Department of Chemical Engineering, Ataturk University, Erzurum, Turkey; email: abayrakceken@atauni.edu.tr",,,,,,Elsevier Ltd,03603199,0080311393,IJHED,,English,Int J Hydrogen Energy,Review,Scopus,,2-s2.0-85113399078,,Turkey,atauni.edu.tr,,,"Mohamud, M.A.; Bayrakceken, A.B."
"Zhou, Z.J., Fang, H.Y., Liu, Y.M., He, L.J., Zhao, J.H., Liu, M.S., Yang, W.H.","ZIF-8-Derived Dual Metal (Fe, Ni)-Nitrogen-Doped Porous Carbon for Superior ORR Performance in Universal Acid-Base Properties Solutions",2023,ISRAEL JOURNAL OF CHEMISTRY,63,12,,,,9,6,10.1002/ijch.202200058,,"[Zhou, Zijian; Fang, Huiyuan; Liu, Yumin; He, Lijuan; Zhao, Junhui; Liu, Mingshuang; Yang, Weihua] Huaqiao Univ, Coll Mat Sci & Engn, Xiamen 361021, Peoples R China",,"Fe-N/C catalysts have currently comparable oxygen reduction reaction (ORR) activity to Pt/C catalysts, which are up for consideration as the most promising non-precious metal material for research. In spite of this, its development and application are limited by the Fenton effect and insufficient stability. Herein, we have fabricated a FeNi-nitrogen-doped porous carbon (FeNi-NPC) catalyst using solvent thermal method, made from the bimetallic (Fe, Ni)-doped ZIF-8. A soft template of glucose was used to control the pore structure and active specific surface area of the catalyst. With the benefit of the electronic effect of the bimetal, FeNi-NPC catalysts exhibit superior ORR activity and stability to Pt/C catalysts in both acidic (E-1/2=0.8672 V) and alkaline (E-1/2=0.8663 V) conditions. FeNi-NPC demonstrated peak power densities in proton exchange membrane fuel cells (PEMFC) of up to 865 mW cm(-2), which exceeds the currently reported M-N/C catalysts. The work presented here will lead to the design of efficient ORR electrocatalysts in PEMFC devices.",Proton exchange membrane fuel cell; Oxygen reduction reaction; Transition metal nitrogen-doped carbon catalysts; Bimetallic doping,OXYGEN REDUCTION; ORGANIC FRAMEWORKS; FE; CATALYSTS; DENSITY; SITES; NC,Proton exchange membrane fuel cell;Oxygen reduction reaction;Transition metal nitrogen-doped carbon catalysts;Bimetallic doping;OXYGEN REDUCTION;ORGANIC FRAMEWORKS;FE;CATALYSTS;DENSITY;SITES;NC,yangwh@hqu.edu.cn,,"POSTFACH 101161, 69451 WEINHEIM, GERMANY",,,,WILEY-V C H VERLAG GMBH,0021-2148,,,,English,ISR J CHEM,Article,WoS,Chemistry,WOS:000920074600001,2-s2.0-85147128001,China,hqu.edu.cn,Huaqiao Univ,"Huaqiao Univ, China","Zhou, Zijian; Fang, Huiyuan; Liu, Yumin; He, Lijuan; Zhao, Junhui; Liu, Mingshuang; Yang, Weihua"
"Akula, S., Piirsoo, H.M., Kikas, A., Kisand, V., Kaarik, M., Leis, J., Treshchalov, A., Aruvali, J., Kukli, K., Tammeveski, K.",ZIF-8-derived nanocarbon composite-based highly active platinum group metal-free bimetallic electrocatalysts for oxygen reduction reaction in proton exchange membrane fuel cells,2024,ELECTROCHIMICA ACTA,498,,144691,,,10,12,10.1016/j.electacta.2024.144691,,"[Akula, Srinu; Kaarik, Maike; Leis, Jaan; Tammeveski, Kaido] Univ Tartu, Inst Chem, Ravila 14a, EE-50411 Tartu, Estonia; [Piirsoo, Helle-Mai; Kikas, Arvo; Kisand, Vambola; Treshchalov, Alexey; Kukli, Kaupo] Univ Tartu, Inst Phys, W Ostwald Str 1, EE-50411 Tartu, Estonia; [Aruvali, Jaan] Univ Tartu, Inst Ecol & Earth Sci, Vanemuise 46, EE-51014 Tartu, Estonia",,"Non-precious metal catalysts are ideal low-cost substitutes of Pt/C for the sluggish oxygen reduction reaction (ORR), despite the serious stability challenges in proton exchange membrane fuel cells (PEMFC) to alleviate the energy crisis and environmental problems. Platinum group metal (PGM)-free bimetallic composite electrocatalysts are assumed to be an interesting route to be investigated to address the stability and ORR selectivity related issues in PEMFC conditions. In this regard, we propose a simple and facile synthesis route by a composite of multi-walled carbon nanotubes and zeolitic imidazolate framework (ZIF)-8 followed by impregnating dual transition metals (FeMn, FeCo, and CoMn) and evaluate their ORR activity in acid media and PEMFC performance. Various catalyst materials are prepared and optimized to achieve the highest electrocatalytic performance. The prepared catalysts are characterized by various physico-chemical methods to elucidate their textural, structural, and morphological properties. The high ORR electrocatalytic activity and selectivity of the catalyst are reported in terms of half-wave potential and low H2O2 yield as determined by the rotating ring-disk electrode method. The significant electrochemical stability under accelerated durability test and high peak power density (787 mW cm(-2)) in H-2-O-2 PEMFC made these catalysts as potential candidates for efficient alternatives to PGMs in the fuel cell cathodes.",Zeolitic imidazolate framework; Micro-mesoporosity; Non-precious metal catalyst; Oxygen reduction reaction; Proton-exchange membrane fuel cell,NITROGEN-CARBON CATALYSTS; PERFORMANCE; DURABILITY; CATHODE; DESIGN; SITES; IRON,Zeolitic imidazolate framework;Micro-mesoporosity;Non-precious metal catalyst;Oxygen reduction reaction;Proton-exchange membrane fuel cell;NITROGEN-CARBON CATALYSTS;PERFORMANCE;DURABILITY;CATHODE;DESIGN;SITES;IRON,kaido.tammeveski@ut.ee,,"THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",,,,PERGAMON-ELSEVIER SCIENCE LTD,0013-4686,,,,English,ELECTROCHIM ACTA,Article,WoS,Electrochemistry,WOS:001271939000001,2-s2.0-85198252958,Estonia,ut.ee,Univ Tartu,"Univ Tartu, Estonia","Akula, Srinu; Piirsoo, Helle-Mai; Kikas, Arvo; Kisand, Vambola; Kaarik, Maike; Leis, Jaan; Treshchalov, Alexey; Aruvali, Jaan; Kukli, Kaupo; Tammeveski, Kaido"
"Wang, R., Zhang, P., Wang, Y., Wang, Y., Zaghib, K., Zhou, Z.",ZIF-derived Co–N–C ORR catalyst with high performance in proton exchange membrane fuel cells,2020,Progress in Natural Science: Materials International,30,6,,855,860,,66,10.1016/j.pnsc.2020.09.010,https://www.scopus.com/inward/record.uri?eid=2-s2.0-85093956968&doi=10.1016%2Fj.pnsc.2020.09.010&partnerID=40&md5=7e7e38afdbd48e92f3689b4544ef0deb,"Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen, Fujian, China; Hydro-Québec, Montreal, QC, Canada","Wang, Ruixiang, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen, Fujian, China; Zhang, Pengyang, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen, Fujian, China; Wang, Yucheng, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen, Fujian, China; Wang, Yuesheng, Hydro-Québec, Montreal, QC, Canada; Zaghib, Karim, Hydro-Québec, Montreal, QC, Canada; Zhou, Zhiyou, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen, Fujian, China","Metal and nitrogen-doped carbon (M-N-C) materials have been considered as the most promising non-precious metal oxygen reduction (ORR) catalysts to replace expensive Pt catalysts. Due to high Fenton catalytic activity of Fe element and the resulting instability, Co-based N–C (Co–N–C) catalysts without Fenton catalytic activity should be a worthier ORR catalyst being explored. Although the high ORR activity of Co–N–C catalyst has been demonstrated in aqueous half-cell tests, their performance under PEMFC working condition is still far away from that of state-of-the-art Fe–N–C catalysts. In this study, a high-performance Co–N–C catalyst was synthesized by one-step pyrolyzing Co-doped ZIF-8 (zeolitic imidazolate framework-8) particles in-situ grown on the high-surface-area KJ600 carbon black with high electronic conductivity. The resulting Co–N–C catalyst exhibited high intrinsic ORR activity, fast mass transfer rate and high electronic conductivity, and thus yielded a remarkable peak power density of 0.92 W cm-2 in H<inf>2</inf>–O<inf>2</inf> PEMFC, which is comparable to state-of-the-art Fe–N–C catalyst. This strategy is helpful to synthesize highly active M-N-C ORR catalysts with improved mass transfer and electric conductivity. © 2020 Chinese Materials Research Society",Co-based catalyst; Fuel cell; Non-precious metal electrocatalysts; Oxygen reduction; ZIF-8,Carbon black; Catalyst activity; Doping (additives); Electric conductivity; Electrolytic reduction; Mass transfer; Oxygen; Precious metals; Proton exchange membrane fuel cells (PEMFC); Co based; Co-based catalysts; Metal-doped; Nitrogen-doped carbons; Non-precious metal electrocatalyst; Non-precious metals; Oxygen Reduction; Performance; Zeolitic imidazolate framework-8; ]+ catalyst; Electrocatalysts,Co-based catalyst;Fuel cell;Non-precious metal electrocatalysts;Oxygen reduction;ZIF-8;Carbon black;Catalyst activity;Doping (additives);Electric conductivity;Electrolytic reduction;Mass transfer;Oxygen;Precious metals;Proton exchange membrane fuel cells (PEMFC);Co based;Co-based catalysts;Metal-doped;Nitrogen-doped carbons;Non-precious metal electrocatalyst;Non-precious metals;Performance;Zeolitic imidazolate framework-8;]+ catalyst;Electrocatalysts,"Z. Zhou; State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China; email: zhouzy@xmu.edu.cn; Y. Wang; State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China; email: wangyc@xmu.edu.cn",,,,,,Elsevier B.V.,10020071,,PNASE,,English,Prog. Nat. Sci.,Article,Scopus,,2-s2.0-85093956968,,China;Canada,xmu.edu.cn,,,"Wang, R.; Zhang, P.; Wang, Y.; Wang, Y.; Zaghib, K.; Zhou, Z."
"Xue, L.F., Li, Y.C., Liu, X.F., Liu, Q.T., Shang, J.X., Duan, H.P., Dai, L.M., Shui, J.L.",Zigzag carbon as efficient and stable oxygen reduction electrocatalyst for proton exchange membrane fuel cells,2018,NATURE COMMUNICATIONS,9,,3819,,,8,258,10.1038/s41467-018-06279-x,,"[Xue, Longfei; Li, Yongcheng; Liu, Xiaofang; Liu, Qingtao; Shang, Jiaxiang; Duan, Huiping; Shui, Jianglan] Beihang Univ, Sch Mat Sci & Engn, 37 Xueyuan Rd, Beijing 100083, Peoples R China; [Dai, Liming] Case Western Reserve Univ, Dept Macromol Sci & Engn, 10900 Euclid Ave, Cleveland, OH 44106 USA; [Dai, Liming] Univ New South Wales, UNSW CWRU Int Joint Lab, Sch Chem Engn, Sydney, NSW 2051, Australia",,"Non-precious-metal or metal-free catalysts with stability are desirable but challenging for proton exchange membrane fuel cells. Here we partially unzip a multiwall carbon nanotube to synthesize zigzag-edged graphene nanoribbons with a carbon nanotube backbone for electrocatalysis of oxygen reduction in proton exchange membrane fuel cells. Zigzag carbon exhibits a peak areal power density of 0.161 W cm(-2) and a peak mass power density of 520 W g(-1), superior to most non-precious-metal electrocatalysts. Notably, the stability of zigzag carbon is improved in comparison with a representative iron-nitrogen-carbon catalyst in a fuel cell with hydrogen/oxygen gases at 0.5 V. Density functional theory calculation coupled with experimentation reveal that a zigzag carbon atom is the most active site for oxygen reduction among several types of carbon defects on graphene nanoribbons in acid electrolyte. This work demonstrates that zigzag carbon is a promising electrocatalyst for low-cost and durable proton exchange membrane fuel cells.",,GRAPHENE NANORIBBONS; ACTIVE-SITES; NITROGEN; NANOTUBES; CATALYSTS; PERFORMANCE; EVOLUTION; DEFECTS; INSIGHT; ORIGIN,GRAPHENE NANORIBBONS;ACTIVE-SITES;NITROGEN;NANOTUBES;CATALYSTS;PERFORMANCE;EVOLUTION;DEFECTS;INSIGHT;ORIGIN,hpduan@buaa.edu.cn; liming.dai@case.edu; shuijianglan@buaa.edu.cn,,"MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND",,,,NATURE PUBLISHING GROUP,2041-1723,,,30232335,English,NAT COMMUN,Article,WoS,Science & Technology - Other Topics,WOS:000445029700010,2-s2.0-85053496651,China;United States;Australia,buaa.edu.cn,Beihang Univ;Case Western Reserve Univ;Univ New South Wales,"Beihang Univ, China;Case Western Reserve Univ, United States;Univ New South Wales, Australia","Xue, Longfei; Li, Yongcheng; Liu, Xiaofang; Liu, Qingtao; Shang, Jiaxiang; Duan, Huiping; Dai, Liming; Shui, Jianglan"