期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 45, 期 43, 页码 22556-22566出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.06.185
关键词
0D/2D heterojunction; Mo-doped Ni2P nanodots; Doping effect; Photocatalytic H-2 evolution; Charge separation behavior
资金
- NSFC Shanxi Coal Based Low Carbon Joint Fund [U1810117]
- National Natural Science Foundation of China [21606114, 21878131]
- Natural Science Foundation of Jiangsu Province [BK20190867]
- Open Project Program of Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University) [2019009]
- Scientific Research Foundation for Senior Talent of Jiangsu University [17JDG020]
Development of low cost and efficient non-noble-metal cocatalyst is still a hot topic to improve the activity of g-C3N4 in photocatalytic water splitting to produce H-2. As a po-tential cocatalyst in photocatalytic application, transition metal phosphides (TMPs) have been proved to greatly enhance the photocatalytic H-2 evolution performance comparable to noble metal Pt. Modifying TMPs by incorporation of hetero-metal has also been reported as an effective strategy for their electronic structure regulation and optimizing the in-termediates absorption energy, however, which is rarely reported in the field of photo-catalysis. Herein, the 0D/2D heterojunction is constructed by high-dispersity Mo-doped Ni2P nanodots supported on g-C3N4 nanosheets, which exhibits the significantly improved photocatalytic H-2 evolution performance compared with that of Ni2P/g-C3N4 and Pt/g-C3N4. Specifically, the optimal H-2 evolution rate reaches 67.6 mmol h(-1) over Mo-Ni2P/g-C3N4 sample, which is 6.0 and 2.4 times higher than those of Pt/g-C3N4 and Ni2P/g-C3N4, respectively. The fascinating result mainly stems from the improved separation efficiency of charge carriers and more effective electron donating reaction sites resulted from the electronic structure adjustment through doping Mo element into Ni2P as cocatalyst. This work provides a valid evidence for the modification of cocatalyst to realize high H-2 evolution performance, opening up new opportunities and possibilities for the application of TMPs in the photocatalytic field. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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