Journal
APPLIED SURFACE SCIENCE
Volume 444, Issue -, Pages 485-490Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2018.03.068
Keywords
Hydrogen production; CdS; Co cocatalyst; Water splitting
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Funding
- National Natural Science Foundation of China [51602091, 21773153]
- International Cooperation Project of Department of Science and Technology of Henan Province [162102410011]
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Non-noble metal Co were loaded on CdS for enhancing photocatalytic activity of water splitting by a simple and efficient in situ photodeposition method. The Co particles with diameter ca. 5 nm were photoreduced and then loaded on the surface of CdS. The loading of Co can not only effectively promote the separation of electrons and holes photoexcited by CdS, but reduce the overpotential of hydrogen evolution as well, thus enhancing photocatalytic activity of water splitting. The highest photocatalytic H-2 evolution rate of Co/CdS reaches up to 1299 mu mol h(-1) under visible light irradiation(lambda > 420 nm) when the amount of loading is 1.0 wt%, which is 17 times of that of pure CdS and achieves 80% of that of 0.5 wt % Pt/ CdS. This work not only exhibits a pathway to obtain photocatalysts with high photocatalytic activity for hydrogen production, but provides a possibility for the utilization of low cost Co as a substitute for noble metals in photocatalytic hydrogen production. (C) 2018 Elsevier B.V. All rights reserved.
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