期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 6, 期 3, 页码 811-816出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta09569d
关键词
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资金
- International cooperation projects of the Ministry of Science and Technology [2014DFE60170]
- National Natural Science Foundation of China [61474065, 61674084]
- Tianjin Research Key Program of Application Foundation and Advanced Technology [15JCZDJC31300]
- Key Project in the Science & Technology Pillar Program of Jiangsu Province [BE2014147-3]
- 111 Project [B16027]
Making highly efficient photoelectrodes for a photoelectrochemical (PEC) water splitting reaction is vitally important for bringing solar/electrical-to-hydrogen energy conversion processes into reality. Active and stable catalysts in the photoelectrode are the key component in PEC devices. Although most hydrogen evolution catalysts exhibit excellent performance in acid solutions, earth abundant oxygen evolution catalysts are generally unstable. Therefore, the elaborate design of highly active and stable photocathodes possessing great onset potential in non-acid environments is imperative. Here, we report that magnetron sputtering and electrochemical-deposition preparation methods are compatible with photo-absorbers for depositing titanium (Ti)/cobalt-sulfide (Co-S) catalyst on amorphous silicon/amorphous silicon (a-Si/a-Si) tandem solar cells, realizing a stable, low-cost, and efficient photocathode for water splitting in non-acid solutions. This photocathode exhibits a high photocurrent onset potential of 1.78 V vs. reversible hydrogen electrode (RHE) in alkaline and neutral electrolyte, with a photocurrent of 6.34 mA cm(-2) at 0 V vs. RHE. The facile preparation of this highly active a-Si/a-Si/Ti/Co-S photocathode paves the way to integrate them into various oxygen evolution catalysts to develop highly efficient, low-cost, and monolithic PEC solar water splitting devices.
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