Solar hydrogen production from ethanol-water vapours over metal/TiO2 photocatalysts supported on β-SiC alveolar foams
Creators
- 1. Department of Industrial Chemical and Environmental Engineering, Escuela T´ecnica Superior de Ingenieros Industriales, Universidad Polit´ecnica de Madrid, C/ Jos´e Guti´errez Abascal 2, 28006 Madrid, Spain
- 2. Institut de Chimie et Procédés pour l′ Energie, l′ Environnement et la Santé, ICPEES, CNRS, University of Strasbourg, 25 rue Becquerel, 67087 Strasbourg, France
- 3. Photoactivated Processes Unit, IMDEA Energy, Avda. Ram´on de la Sagra 3, M´ostoles, 28935 Madrid, Spain
- 4. Instituto de Cat´alisis y Petroleoquímica (ICP), CSIC, C/ Marie Curie 2, 28049 Madrid, Spain
Description
In this work, we have explored the feasibility of alveolar open-cell β-SiC foams as catalyst support for solar
hydrogen production. For that purpose, Pt and Ru nanoparticles have been obtained, by means of photoassisted
synthesis, on TiO2-coated foams and tested in gas-phase hydrogen production from water-ethanol mixtures in a
tubular reactor coupled to a compound parabolic solar collector (CPC). Subnanometre-sized metal or metal/
oxide nanoparticles are obtained for Pt/TiO2/SiC and Ru/TiO2/SiC foams, respectively, where co-catalyst
nanoparticles decorate the TiO2 coating which in turn is attached to the SiC foam through an amorphous SiO2
washcoat formed by SiC pre-calcination. In solar photocatalytic reactions, all of the assayed foam-supported
photocatalysts are active for the production of hydrogen, with Pt/TiO2 ones being the most active and foam
pore size exerting little influence on hydrogen outcome. In the best conditions, 14 % UV-to-hydrogen (equivalent
to 0.49 % solar-to-hydrogen) conversion efficiency, with photonic efficiency higher than 30 %, is attained.
Notes
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Solar hydrogen production_Catal.Today_2022.pdf
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