Journal
CHEMICAL COMMUNICATIONS
Volume 55, Issue 67, Pages 9963-9966Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9cc04994k
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Funding
- National Natural Science Foundation of China [21606171]
- China Postdoctoral Science Foundation [2015M580205, 2017T100160]
- Tianjin University Independent Innovation Foundation [1705]
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A Ag film with 10 nm thickness is deposited on a directionally grown Cu2O single crystal photocathode by high power impulse magnetron sputtering (HiPIMS). The continuous Ag film not only forms a dense proton isolator, but also constructs a Schottky junction with Cu2O to accelerate the transportation of photo-induced electrons. After optimization, the photocathode exhibits much-improved activity and stability versus the unmodified one, and over 98% stability (state-of-the-art) remains after 5 h of light-chopping chronoamperometry. The sustained photocurrent density is 4.0 mA cm(-2) at 0 V-RHE.
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