普鲁士蓝
异质结
X射线光电子能谱
光催化
材料科学
量子点
无定形固体
纳米技术
光化学
化学工程
光电子学
化学
催化作用
物理化学
结晶学
电极
电化学
有机化学
工程类
作者
Haiyan Xie,Kai Wang,Dingzhou Xiang,Songling Li,Zhiliang Jin
标识
DOI:10.1002/adsu.202300362
摘要
Abstract The design and development of high‐efficiency and low‐energy consumption catalysts for hydrogen evolution are critical to mitigating environmental problems. Herein, amorphous Co 9 S 8 quantum dots (QDs) are prepared by hydrothermal method and loaded on concave cubic NiS/CdS derived from Prussian blue analog (PBA) to construct an efficient Co 9 S 8 QDs/NiS/CdS dual S‐scheme heterojunction photocatalysts, showing excellent photocatalytic hydrogen performance of 13.45 mmol·g −1 ·h −1 , which is 5.42 times higher than that of pure CdS. The improved photocatalytic performance is ascribed to the creation of a double S‐scheme heterojunction, quantum confinement effect, and a concave cubic structure, accelerating electron transport and offering ample surface active sites. The possible mechanism is demonstrated with valence band XPS (VB‐XPS), ultraviolet photoelectron spectroscopy (UPS), and density functional theory (DFT) calculations. This work provides insight into the exploration of PBA‐based photocatalysts to improve photocatalytic hydrogen evolution and provides an effective strategy for the design of photocatalysts with double the S‐scheme heterojunction.
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