光催化
上部结构
材料科学
异质结
自旋极化
极化(电化学)
分解水
化学工程
光电子学
电子
纳米技术
催化作用
化学
物理化学
量子力学
海洋学
物理
地质学
工程类
生物化学
作者
Bin Fang,Zipeng Xing,Weifeng Kong,Zhenzi Li,Wei Zhou
出处
期刊:Nano Energy
[Elsevier]
日期:2022-10-01
卷期号:101: 107616-107616
被引量:34
标识
DOI:10.1016/j.nanoen.2022.107616
摘要
Electron spin polarization plays a vital role on photocatalysis but rarely considered. Herein, a double-layer hollow yolk-shell Pd/[email protected] superstructure photocatalyst is prepared via two ion exchanges approach using Co-MOF as a template. It shows ferromagnetic characteristics and obvious photothermal effect due to the special structure. Interestingly, the photocatalytic hydrogen evolution is enhanced about twice under external magnetic field compared to field-free. The improvement can be ascribed to the enhanced electron spin polarization of the vacancy defects for Pd/[email protected] superstructure and the formation of Z-scheme heterojunctions promoting efficient photogenerated charge separation and prolonging the lifetimes obviously. The special double-layer hollow yolk-shell superstructure is another reason for the optimized photocatalytic performance, which could expose adequate surface active sites for photocatalytic reaction. Moreover, the high stability of this defective Pd/[email protected] superstructure indicates the potential applications in field of photocatalysis. This strategy may provide new insights for fabricating high-efficient superstructure photocatalysts with electron spin polarization.
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