光催化
材料科学
镍
光致发光
制氢
相(物质)
可见光谱
氢
化学工程
光化学
光电子学
催化作用
冶金
有机化学
化学
工程类
作者
Zhichao Sun,Mingshan Zhu,Mamoru Fujitsuka,Anjie Wang,Chuan Shi,Tetsuro Majima
标识
DOI:10.1021/acsami.7b06386
摘要
The use of noble metal-free nickel phosphides (NixPy) as suitable cocatalysts in photocatalytic hydrogen (H2) generation has gained a lot of interest. In this paper, for the first time, three different crystalline phases of nickel phosphides, Ni2P, Ni12P5, and Ni3P, were synthesized and then hybridized with g-C3N4 to investigate the phase effect of NixPy on photocatalytic H2 generation. It has been found that all three phases of NixPy work as effective cocatalysts for the enhancement of visible light H2 generation with g-C3N4. The effective charge transfer between g-C3N4 and NixPy, demonstrated by photoelectrochemical properties, photoluminescence, and time-resolved diffused reflectance, contributes to the enhanced photocatalytic H2 generation performance. Interestingly, Ni2P/g-C3N4 showed the highest photocatalytic activity among the three NixPy/g-C3N4. NixPy with a higher ratio of phosphorus (Ni2P) can accelerate charge transfer and provide more Ni–P bonds, leading to a preferable H2 generation performance.
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