期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 5, 页码 2541-2547出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202013206
关键词
co-catalyst; H-2 generation; photocatalysis; single-atom doping; water splitting
资金
- National Key Research Program of China [2017YFA0204800, 2016YFA0202403]
- Natural Science Foundation of China [22072081]
- Changjiang Scholar and Innovative Research Team [IRT_14R33]
- 111 Project [B14041]
- Chinese National 1000-Talent-Plan program
- National Key Research and Development Program of China [2017YFA0403400]
Effective transfer and utilization of photogenerated electrons is crucial for achieving highly efficient H-2 generation through photocatalytic water splitting. Single-atom Pt-doped CN as the co-catalyst to CuS demonstrates enhanced photocatalytic performance, reducing overpotential and interfacial resistance for improved water splitting efficiency.
Effective transfer and utilization of the photogenerated electrons are a key factor for achieving highly efficient H-2 generation by photocatalytic water splitting. Apart from the activity of the co-catalyst, the interface between the co-catalyst and semiconductor is of particular importance. Guided by DFT calculations, single-atom (SA) Pt doped carbon nitride (CN) is successfully synthesized for use as the co-catalyst to the semiconducting CuS. The catalyst system (Pt1-CN@CuS) exhibits an enhanced photocatalytic performance for water splitting with a H-2 production rate of 25.4 mu mol h(-1) and an apparent quantum yield (AQY) of 50.3 % under the illumination of LED-530. Solar-to-hydrogen (STH) conversion efficiency is calculated to be 0.5 % under AM 1.5 illumination. This is the very first investigation of SA as the co-catalyst, which decreases the overpotential of CN during the water splitting and lowers interfacial resistance of the catalyst/co-catalyst and co-catalyst/electrolyte.
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