期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 54, 期 2, 页码 664-667出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201410569
关键词
cuprous oxide; hydrogen evolution; photocatalysis; photoelectrochemistry; water splitting
资金
- European Research Council (ERC) [257096]
- Swiss Federal Office for Energy (PECHouse Competence Center) [SI/500090-02]
- PECDEMO project
- Europe's Fuel Cell and Hydrogen Joint Undertaking [621252]
- PHOCS project (European Union) [ENERGY 2012-10.2.1]
- PHOCS project (Future Emerging Technologies Collaborative Project) [309223]
- European Research Council [ARG 247404]
The splitting of water into hydrogen and oxygen molecules using sunlight is an attractive method for solar energy storage. Until now, photoelectrochemical hydrogen evolution is mostly studied in acidic solutions, in which the hydrogen evolution is more facile than in alkaline solutions. Herein, we report photoelectrochemical hydrogen production in alkaline solutions, which are more favorable than acidic solutions for the complementary oxygen evolution half-reaction. We show for the first time that amorphous molybdenum sulfide is a highly active hydrogen evolution catalyst in basic medium. The amorphous molybdenum sulfide catalyst and a Ni-Mo catalyst are then deposited on surface-protected cuprous oxide photocathodes to catalyze sunlight-driven hydrogen production in 1M KOH. The photocathodes give photocurrents of -6.3mAcm(-2) at the reversible hydrogen evolution potential, the highest yet reported for a metal oxide photocathode using an earth-abundant hydrogen evolution reaction catalyst.
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