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Photocatalytic performance and mechanism of hydrogen evolution from water over ZnCdS/Co@CoO in sacrificial agent-free system.
- Source :
-
International Journal of Hydrogen Energy . Jul2022, Vol. 47 Issue 60, p25289-25299. 11p. - Publication Year :
- 2022
-
Abstract
- Photocatalytic efficient hydrogen evolution from pure water with non-noble metal system has more practical application value. In this study, the ZnCdS/Co@CoO composite photocatalyst was prepared by a simple hydrothermal reduction method. The hydrogen evolution rate from water can reach to 793 μmol·g−1·h−1 in sacrificial agent-free system, and 5445 μmol·g−1·h−1 with Na 2 S and Na 2 SO 3 as sacrificial agent. The S-scheme heterojunction formed between ZnCdS and Co@CoO, as well as the abundant S vacancy were proved to be the key factors to effectively improve the photocatalytic performance. The study on the high hydrogen production efficiency and catalytic mechanism of ZnCdS/Co@CoO in sacrificial agent-free can provide ideas for the design and preparation of more efficient non-noble metal photocatalysts. [Display omitted] • The tiny ZnCdS/Co@CoO nanoparticles effectively shorten the electron transport distance. • The hydrogen yield can reach 793 μmol g−1 h−1 in sacrificial agent-free system. • The S vacancy acts as electron trap and avoids the recombination of electrons and holes. • The S-scheme heterojunction can be constructed between ZnCdS and Co@CoO. • The S-scheme heterojunction is favorable for the separation and transfer of electron-hole pair. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03603199
- Volume :
- 47
- Issue :
- 60
- Database :
- Academic Search Index
- Journal :
- International Journal of Hydrogen Energy
- Publication Type :
- Academic Journal
- Accession number :
- 158389834
- Full Text :
- https://doi.org/10.1016/j.ijhydene.2022.05.251