期刊
CHEMICAL ENGINEERING JOURNAL
卷 446, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.137399
关键词
CoS clusters; Density functional theory; Interfacial charge rearrangements; D-band center; Photocatalytic H 2 production
资金
- Natural National Science Foundation of China [21673022, 22178084]
- Fundamental Research Funds for the Central Universities [B2021208005]
- Foundation for Innovative Research Groups of the Natural Science Foundation of Hebei Province [B2015208010]
- Natural Science Foundation for Distin-guished Young Scholars of Hebei Province
CoS clusters were grown on CdS nanorods, forming Cd-S-Co bonds. The Cd-S-Co bonds induced charge rearrangements, leading to improved photocatalytic H2 production. This study provides a foundation for the preparation of clustersemiconductors photocatalytic materials and explores the transfer pathway between clusters and catalysts at the atomic level, elucidating the mechanism of their catalytic performance.
Clusters with this unique atomic arrangement and configuration are highly potential cocatalysts, but designing efficient clusters and clarifying the mechanism of action remains a challenge. Herein, CoS clusters are in-situ grown on CdS nanorods, which leads to the existence of Cd-S-Co bonds. It is found that the Cd-S-Co bonds could induce interfacial charge rearrangements. Theoretical calculations reveal that the charge redistribution of heterostructures at interfaces is conducive to modulating d-band center, reducing thermodynamic energy barriers, and improving carrier separation. The optimized CdS/CoS composite shows a great photocatalytic H2 production rate (65.7 mmol h-1 g-1), such a H2 evolution rate exceeded most reported CdS nanorods photocatalyst. This study provides an experimental and theoretical foundation for the preparation of clustersemiconductors photocatalytic materials and explores the transfer pathway between clusters and catalysts at the atomic level, and deeply discusses the mechanism of their catalytic performance.
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