Journal
JACS AU
Volume 1, Issue 2, Pages 212-220Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacsau.0c00082
Keywords
Prussian blue analogue; CdS nanowires; beaded structure; photocatalytic hydrogen evolution; electron bridge
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Funding
- NSFC [21871141, 21871142, 21701085, 21901122]
- China Postdoctoral Science Foundation [2018M630572, 2019M651873, 2020M682747]
- Applied Science and Technology Planning Project of Guangdong Province of China [2017B090917002]
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The study focused on CdS photocorrosion and recombination of electron-hole pairs in photocatalytic hydrogen evolution, proposing a temperature-induced self-assembly strategy for PBA/CdS nanocomposites. The specially designed structure efficiently harvested visible light and inhibited photocorrosion, while PBA provided channels for mass transfer and photocatalytic reaction centers.
The design of a powerful heterojunction structure and the study of the interfacial charge migration pathway at the atomic level are essential to mitigate the photocorrosion and recombination of electron-hole pairs of CdS in photocatalytic hydrogen evolution (PHE). A temperature-induced self-assembly strategy has been proposed for the syntheses of Prussian blue analogue (PBA)/CdS nanocomposites with beaded structure. The specially designed structure had evenly exposed CdS which can efficiently harvest visible light and inhibit photocorrosion; meanwhile, PBA with a large cavity provided channels for mass transfer and photocatalytic reaction centers. Remarkably, PB-Co/CdS-LT-3 exhibits a PHE rate of 57 228 mu mol h(-1) g(-1), far exceeding that of CdS or PB-Co and comparable to those of most reported crystalline porous material-based photocatalysts. The high performances are associated with efficient charge migration from CdS to PB-Co through CN-Cd electron bridges, as revealed by the DFT calculations. This work sheds light on the exploration of heterostructure materials in efficient PHE.
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