Solar hydrogen production from ethanol-water vapours over metal/TiO2 photocatalysts supported on β-SiC alveolar foams
| Autor: | Patricia García-Muñoz, Javier Ivanez, Víctor A. de la Peña O’Shea, Nicolas Keller, Fernando Fresno |
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| Rok vydání: | 2022 |
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| DOI: | 10.5281/zenodo.7685081 |
| Popis: | 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. This work has received financial support from Spanish MCIN/AEI/ 10.13039/501100011033 and "ERDF A way of making Europe", through projects PID2020–118593RB-C22 and ENE2017-89170-R, from Comunidad de Madrid European Structural Funds through FotoArt-CM project (S2018/NMT-4367), and from the European Research Council (ERC) through the HyMAP. |
| Databáze: | OpenAIRE |
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