Journal
CHEMCATCHEM
Volume 7, Issue 18, Pages 2979-2985Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201500485
Keywords
bismuth; porous materials; reduced graphene oxide; vanadium; water splitting
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Funding
- National Basic Research Program of China (973 Program) [2013CB632404]
- Priority Academic Program Development of Jiangsu Higher Education Institutions, New Century Excellent Talents in University [NCET-12-0268]
- National Natural Science Foundation of China [21473090, 51272102]
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Bismuth vanadate photoanodes often suffer from poor electron transport, which restricts their photoelectrochemical performance in water oxidation. Here, reduced graphene oxide sheets with excellent electronic conductivity are introduced to bismuth vanadate photoanode films to provide a channel for electron transport. As a result, the charge separation efficiency of the photoanode films increases from 59 to 78% at 420nm and 1.23V (vs. the reversible hydrogen electrode) under back irradiation. In particular, the onset potential for photoelectrochemical water oxidation over reduced graphene oxide-bismuth vanadate photoanode films has a cathodic shift of approximately 120mV in potassium borate electrolyte compared to bare bismuth vanadate photoanode films.
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