期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 134, 期 16, 页码 6968-6971出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja302059g
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资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan
- CREST-JST
- KAITEKI Institute, Inc.
Highly stable photoelectrochemical water splitting is demonstrated for the first time on a tantalum oxynitride (TaON) photoanode under visible light irradiation. Highly dispersed CoOx nanoparticles on the TaON photoanode efficiently scavenge photogenerated holes and effectively suppress self-oxidative deactivation of the TaON surface, resulting in a stable photocurrent. The use of highly dispersed CoOx cocatalyst on TaON together with phosphate solutions significantly increased the photocurrent due to the formation of a cobalt/phosphate phase. This enabled us to stably split water into H-2 and O-2 under visible light irradiation at a relatively low applied bias (0.6 V vs Pt counter electrode).
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