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Rare earth material CeO2 modified CoS2 nanospheres for efficient photocatalytic hydrogen evolution.
- Source :
- New Journal of Chemistry; 12/14/2021, Vol. 45 Issue 46, p21795-21806, 12p
- Publication Year :
- 2021
-
Abstract
- The development of high-efficiency and low-cost photocatalysts for hydrogen production reactions is very important to solve energy problems. In this paper we study the photocatalytic H<subscript>2</subscript> evolution activity of a CeO<subscript>2</subscript>/CoS<subscript>2</subscript> heterojunction catalyst under visible light. Characterization studies such as XRD and XPS proved the successful synthesis of a CeO<subscript>2</subscript>/CoS<subscript>2</subscript> catalyst. The composite catalyst with a CeO<subscript>2</subscript> and CoS<subscript>2</subscript> mass ratio of 1 : 20 had the best activity, and the hydrogen evolution rate reached 5172.20 μmol g<superscript>−1</superscript> h<superscript>−1</superscript>. BET and UV-Vis DRS characterization showed that the introduction of CeO<subscript>2</subscript> not only increased the specific surface area of the composite catalyst, but also improved the response of the photocatalyst to visible light. In addition, PL and electrochemical experiments showed that the electrons and holes of the CeO<subscript>2</subscript>/CoS<subscript>2</subscript> catalyst could be quickly separated and transferred, thereby accelerating the kinetics of the hydrogen evolution reaction. This work provided an experimental basis for designing a composite photocatalyst with high stability and hydrogen production activity. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 45
- Issue :
- 46
- Database :
- Complementary Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 153843497
- Full Text :
- https://doi.org/10.1039/d1nj04196g