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Redox Dual-Cocatalyst-Modified CdS Double-Heterojunction Photocatalysts for Efficient Hydrogen Production.
| Content Provider | Europe PMC |
|---|---|
| Author | Zhao, Yi Lu, Yongfeng Chen, Lu Wei, Xiaofeng Zhu, Jiefang Zheng, Yuanhui |
| Copyright Year | 2020 |
| Abstract | Cadmiumsulfide (CdS) as one of the most common visible-light-responsivephotocatalysts has been widely investigated for hydrogen generation.However, its low solar–hydrogen conversion efficiency causedby fast carrier recombination and poor catalytic activity hindersits practical applications. To address this issue, we develop a noveland highly efficient nickel–cobalt phosphide and phosphatecocatalyst-modified CdS (NiCoP/CdS/NiCoPi) photocatalyst for hydrogenevolution. The dual-cocatalysts were simultaneously deposited on CdSduring one phosphating step by using sodium hypophosphate as the phosphorussource. After the loading of the dual-cocatalysts, the photocurrentof CdS significantly increased, while its electrical impedance andphotoluminescence emission dramatically decreased, which indicatesthe enhancement of charge carrier separation. It was proposed thatthe NiCoP cocatalyst accepts electrons and promotes hydrogen evolution,while the NiCoPi cocatalyst donates electrons and accelerates theoxidation of sacrificial agents (e.g., lactic acid). Consequently,the visible-light-driven hydrogen evolution of this composite photocatalystgreatly improved. The dual-cocatalyst-modified CdS with a loadingcontent of 5 mol % showed a high hydrogen evolution rate of 80.8 mmol·g–1·h–1, which was 202 times higherthan that of bare CdS (0.4 mmol·g–1·h–1). This is the highest enhancement factor for metalphosphide-modified CdS photocatalysts. It also exhibited remarkablestability in a continuous photocatalytic test with a total reactiontime of 24 h. |
| ISSN | 19448244 |
| Journal | ACS Applied Materials & Interfaces |
| Volume Number | 12 |
| PubMed Central reference number | PMC7584331 |
| Issue Number | 41 |
| PubMed reference number | 32929955 |
| e-ISSN | 19448252 |
| DOI | 10.1021/acsami.0c12790 |
| Language | English |
| Publisher | AmericanChemical Society |
| Publisher Date | 2020-09-29 |
| Access Restriction | Open |
| Rights License | This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. |
| Subject Keyword | cadmium sulfide phosphide phosphate double heterojunctions photocatalytic hydrogen evolution |
| Content Type | Text |
| Resource Type | Article |
| Subject | Nanoscience and Nanotechnology Medicine Materials Science |
