期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 125, 期 -, 页码 59-66出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2022.02.034
关键词
Red phosphorus; Cobalt phosphide; Heterostructure; Photocatalytic hydrogen evolution
资金
- National Natural Science Foundation of China [51672143, 51808303, 52102362]
- Taishan Scholar Program of Shandong Province [ts201712030]
- Outstanding Youth of Natural Science in Shandong Province [JQ201713]
- Shandong Provincial Natural Science Foundation [ZR2021QB022, ZR2021ME012]
- Applied Basic Research of Qingdao City (Special Youth Project) [19-6-2-74-cg]
- Qingdao Science and Technology Plan Key Research and Development Special Project [21-1-2-17-xx]
- State Key Laboratory of Bio-Fibers and Eco-Textiles (Qingdao University) [ZKT-25, ZK T-26, ZKT-30, ZDKT202105]
- Science and Technology Support Plan for Youth Innovation of Colleges in Shandong Province [DC2000000961]
In this study, a cobalt phosphide-modified red phosphorus heterostructure was developed, exhibiting high photocatalytic hydrogen production activity under visible light irradiation. By tuning the amount of cobalt phosphide, the optimized hybrid showed a significantly improved hydrogen evolution rate under visible light, and the interaction between CoP2 and RP played a crucial role in enhancing the activity.
Red phosphorus (RP) is a promising visible-light-driven semiconductor for photocatalytic hydrogen evolution, but the activity is restricted due to the rapid charge carrier recombination and sluggish surface reaction kinetics. Herein, cobalt phosphide (CoP2) modified RP heterostructure was developed by in situ phosphorization of cobalt oxide from phosphorus vapor. By tuning the amounts of CoP2 in the heterostructure, the optimized hybrid exhibited a HER rate reaching 11.79 mu mol h(-1) under visible light illumination, which is 3.5 times higher than that of the RP with Pt as cocatalyst. It was experimentally indicated that the intimate interaction between CoP2 and RP gave rise to improved visible light absorption and accelerated photogenerated electron-holes separation. Moreover, the CoP2 as a noble-metal-free cocatalyst could promote the surface hydrogen evolution reaction, which synergetic benefited the photocatalytic hydrogen production activity. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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