结晶度
催化作用
磷化物
光催化
制氢
材料科学
X射线光电子能谱
过渡金属
氢
光化学
带隙
化学工程
纳米技术
化学
光电子学
有机化学
复合材料
工程类
生物化学
作者
Yanbing Li,Zhiliang Jin,Hai Li,Ang Li,Yupeng Zhang,Guorong Wang
标识
DOI:10.1016/j.jcis.2019.01.101
摘要
Economical, efficient and stable single photo-catalysts are vital for realizing enhanced photo-catalytic H2 evolution activity. In this study, we report two n-type single transition metal phosphide with excellent photo-catalytic activity under visible light irradiation, which is of great significance for the discovery and synthesis of novel and more efficient photo-catalysts. And completely controllable synthesis will greatly reduce application costs. Furthermore, the fairly high activity of H2 evolution of the resulting catalysts having low crystallinity and extremely strong optical properties is reveled in detail via investigating the dynamics of hydrogen generation of CoP and WP. Moreover, it is found that CoP and WP have low band-gap energy and increased optical absorption properties through studies. Meanwhile, low crystallinity state for they also is get by XRD technology. These may be the main reasons why CoP and WP exhibit efficient H2 evolution activity. In addition, the possible mechanism showing high photo-catalytic activity of hydrogen evolution for CoP and WP is proposed by a series of other characterizations, such as SEM, TEM, XPS, BET, transient photo-current response, steady-state fluorescence, transient-state fluorescence and Mott-Schottky studies etc.
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