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Title: p-Type CuRhO2 as a Self-Healing Photoelectrode for Water Reduction under Visible Light

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/ja408876k· OSTI ID:1418445

Polycrystalline CuRhO2 is investigated as a photocathode for the splitting of water under visible irradiation. The band edge positions of this material straddle the water oxidation and reduction redox potentials. Thus, photogenerated conduction band electrons are sufficiently energetic to reduce water, while the associated valence band holes are energetically able to oxidize water to O2. Under visible illumination, H2 production is observed with ~0.2 V underpotential in an air-saturated solution. In contrast, H2 production in an Ar-saturated solution was found to be unstable. This instability is associated with the reduction of the semiconductor forming Cu(s). However, in the presence of air or O2, bulk Cu(s) was not detected, implying that CuRhO2 is self-healing when air is present. Here, this property allows for the stable formation of H2 with ca. 80% Faradaic efficiency.

Research Organization:
Princeton Univ., NJ (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Contributing Organization:
Princeton University
Grant/Contract Number:
SC0002133
OSTI ID:
1418445
Journal Information:
Journal of the American Chemical Society, Vol. 136, Issue 3; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 120 works
Citation information provided by
Web of Science

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