催化作用
材料科学
X射线光电子能谱
光催化
异质结
氢
制氢
复合数
化学工程
石墨烯
光催化分解水
乙炔
分解水
纳米技术
复合材料
化学
有机化学
光电子学
工程类
作者
Linqing Zhang,Minjun Lei,Zhiliang Jin
出处
期刊:2D materials
[IOP Publishing]
日期:2023-10-18
卷期号:11 (1): 015002-015002
被引量:3
标识
DOI:10.1088/2053-1583/ad01c8
摘要
Abstract As is well known, how to deeply understand the charge separation and charge transfer capabilities of catalysts, as well as how to optimize these capabilities of catalysts to improve hydrogen production performance, remains a huge challenge. In recent years, a new type of carbon material graphdiyne (GDY) has been proposed. GDY acetylene has a special atomic arrangement that graphene does not have a two-dimensional network of sp 2 and sp conjugated intersections makes it easier to construct active sites and improve photocatalytic ability. In addition, GDY also has the advantage of adjusting the bandgap of other catalysts and inhibiting carrier recombination, making it more prone to hydrogen evolution reactions. In addition to using mechanical ball milling to produce GDY, NiWO 4 without precious metals was also prepared. The sheet-like structure of GDY in the composite catalyst provides a anchoring site and more active sites for the granular NiWO 4 . And the composite catalyst fully enhances the good conductivity of GDY and its unique ability to enhance electron transfer, greatly improving the ability of NiWO 4 as a single substance. Through in-situ x-ray photoelectron spectrometer, it was demonstrated that a p–n heterojunction was constructed between GDY and NiWO 4 in the composite catalyst, further enhancing the synergistic effect between the two, resulting in a hydrogen production rate of 90.92 μ mol for the composite catalyst is 4.56 times higher than that of GDY and 4.97 times higher than that of NiWO 4 , respectively, and the stability of the composite catalyst is significantly higher than that of each single catalyst.
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