Black Phosphorus/Palladium Nanohybrid: Unraveling the Nature of P−Pd Interaction and Application in Selective Hydrogenation
Creators
- 1. CNR-ICCOM, Via Madonna del Piano10, 50019 Sesto Fiorentino, Italy
- 2. NEST Istituto NanoscienzeCNR and Scuola Normale Superiore, Piazza S. Silvestro 12, 56127 Pisa, Italy
- 3. CNR-IFAC, Via Madonna del Piano10, 50019 Sesto Fiorentino, Italy
- 4. CNR-IMM Istituto per la Microelettronica e Microsistemi, VIII strada 5, I-95121 Catania, Italy
- 5. Department of Industrial Engineering, University of Florence, Via di S. Marta 3, 50139 Florence, 50139, Italy
- 6. Department of Earth Sciences, University of Florence, Via La Pira 4, 50121 Firenze, Italy
- 7. CNR-IOM-OGG, c/o European Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS 40220, 38043 Grenoble, Cedex 9 France
Description
The burgeoning interest in 2D black phosphorus (bP) contributes to expand its applications in countless fields. In the present study, 2D bP is used as a support for homogeneously dispersed palladium nanoparticles directly grown on it by a wet chemical process. EELS-STEM analysis evidences a strong interaction between palladium and P atoms of bP nanosheets. A quantitative evaluation of this interaction comes from XAS measurements that find out a very short Pd-P distance of 2.26 Å proving for the first time the existence of an unprecedented Pd-P coordination bond of covalent nature. Additionally, the average Pd-P coordination number of about 1.7 reveals that bP acts as a polydentate phosphine ligand towards the surface Pd atoms of the nanoparticles, thus preventing their agglomeration and inferring structural stability. These unique properties result in a superior performance in the catalytic hydrogenation of chloro-nitroarenes to chloroaniline, where a higher chemoselectivity in comparison to other heterogeneous catalyst based on palladium has been observed.
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pb-pd-4zenodo.pdf
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