Journal
CHINESE JOURNAL OF CATALYSIS
Volume 40, Issue 2, Pages 160-167Publisher
SCIENCE PRESS
DOI: 10.1016/S1872-2067(19)63283-3
Keywords
Photocatalysis; Ni3N; Cocatalyst; Hydrogen evolution; g-C3N4
Funding
- National Key Research and Development Program of China [2017YFA0402800]
- National Natural Science Foundation of China [51772285, 21473170, 51878004]
- Natural Science Fund of of Anhui Province [1808085ME139]
- Fundamental Research Funds for the Central Universities
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Photocatalytic H-2 production via water splitting in a noble-metal-free photocatalytic system has attracted much attention in recent years. In this study, noble-metal-free Ni3N was used as an active cocatalyst to enhance the activity of g-C3N4 for photocatalytic H-2 production under visible-light irradiation (lambda > 420 nm). The characterization results indicated that Ni3N nanoparticles were successfully loaded onto the g-C3N4, which accelerated the separation and transfer of photogenerated electrons and resulted in enhanced photocatalytic H-2 evolution under visible-light irradiation. The hydrogen evolution rate reached similar to 305.4 mu mol h(-1) g(-1), which is about three times higher than that of pristine g-C3N4, and the apparent quantum yield (AQY) was similar to 0.45% at lambda = 420 . Furthermore, the Ni3N/g-C(3)N(4)photocatalyst showed no obvious decrease in the hydrogen production rate, even after five cycles under visible-light irradiation. Finally, a possible photocatalytic hydrogen evolution mechanism for the Ni3N/g-C3N4 system is proposed. (C) 2019, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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