期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 137, 期 22, 页码 7035-7038出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.5b03417
关键词
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资金
- ERG [257096]
- Swiss Federal Office of Energy [SI/500750-01]
- CCMX (Materials Challenge: Coatings Competence Center)
Coupling of Earth-abundant hydrogen evolution catalysts to photoabsorbers is crucial for the production of hydrogen fuel using sunlight. In this work, we demonstrate the use of magnetron sputtering to deposit Mo2C as an efficient hydrogen evolution reaction catalyst onto surface-protected amorphous silicon (a-Si) photoabsorbers. The a-Si/Mo2C photocathode evolves hydrogen under simulated solar illumination in strongly acidic and alkaline electrolytes. Onsets of photocurrents are observed at potentials as positive as 0.85 V vs RHE. Under AM 1.5G (1 sun) illumination, the photocathodes reach current densities of -11.2 mA cm(-2) at the reversible hydrogen potential in 0.1 M H2SO4 and 1.0 M KOH. The high photovoltage and low-cost of the Mo2C/a-Si assembly make it a promising photocathode for solar hydrogen production.
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