Phase Effect of NixPy Hybridized with g-C3N4 for Photocatalytic Hydrogen Generation.
Phase Effect of NixPy Hybridized with g-C3N4 for Photocatalytic Hydrogen Generation.
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DOI：
10.1021/acsami.7b06386
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发表时间：
2017-09
影响因子：
9.5
通讯作者：
Zhichao Sun;Mingshan Zhu;M. Fujitsuka;Anjie Wang;C. Shi;T. Majima
中科院分区：
文献类型：
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作者：
Zhichao Sun;Mingshan Zhu;M. Fujitsuka;Anjie Wang;C. Shi;T. Majima
无贵金属磷化镍(NixPy)作为合适的助催化剂在光催化制氢中的应用引起了人们的极大兴趣。本文首次合成了三种不同晶相的磷化镍Ni2P、Ni12P5和Ni3P，并将其与g-C3N4杂化，考察了NixPy在光催化制氢中的相效应。研究发现，NixPy的三种相均能有效地促进g-C3N4生成可见光H2。光电化学性质、光致发光和时间分辨漫反射表明，g-C3N4和NixPy之间的有效电荷转移有助于提高光催化制氢性能。有趣的是，Ni2P/g-C3N4在三种NixPy/g-C3N4中表现出最高的光催化活性。具有较高磷比的NixPy(Ni2P)可以加速电荷转移，并提供更多的Ni-P键，从而产生更好的氢气性能。
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.