Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 8, Issue 1, Pages 512-519Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.9b05936
Keywords
CuInS2; Photocathode; Cocatalyst; Hole-transfer layer; Photoelctrochemical water splitting
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Funding
- Science Funds of Tianjin for Distinguished Young Scholar [17JCJQJC44800]
- Key Research and Development Plan of Tianjin [19YFSLQY00020]
- Open Foundation of Hubei Collaborative Innovation Center for High-efficient Utilization of Solar Energy [HBSKFZD2017001]
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Developing cost-effective and robust cocatalysts to substitute conventional Pt-group noble metals may be a great challenging stratagem for effective photoelectrochemical (PEC) water splitting. It is certified that the designed low-cost nickel oxides (NiO) and nickel sulfides (NiS) to co-modify a CuInS2 photocathode presents good light absorption, outstanding photocurrent density, and considerable positive onset potential, ascribing to the superior catalytic behavior of NiS for the hydrogen evolution reaction as well as the introduction of the NiO hole transfer layer (HTL). The resulting NiS/CuInS2/NiO photocathode exhibits a dramatically enhanced photocurrent density of -2.23 mA/cm(2) at -0.6 V vs RHE, 175% higher than that of the CuInS2 photocathode alone. Our work can provide a reliable approach for low-cost cocatalyst design to replace noble metals in practical applications toward sunlight-driven PEC water splitting.
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