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Single-atom Sn-Zn pairs in CuO catalyst promote dimethyldichlorosilane synthesis.
- Source :
-
National Science Review . Mar2020, Vol. 7 Issue 3, p600-608. 9p. - Publication Year :
- 2020
-
Abstract
- Single-atom catalysts are of great interest because they can maximize the atom-utilization efficiency and generate unique catalytic properties; however, much attention has been paid to single-site active components, rarely to catalyst promoters. Promoters can significantly affect the activity and selectivity of a catalyst, even at their low concentrations in catalysts. In this work, we designed and synthesized CuO catalysts with atomically dispersed co-promoters of Sn and Zn. When used as the catalyst in the Rochow reaction for the synthesis of dimethyldichlorosilane, this catalyst exhibited much-enhanced activity, selectivity and stability compared with the conventional CuO catalysts with promoters in the form of nanoparticles. Density functional theory calculations demonstrate that single-atomic Sn substitution in the CuO surface can enrich surface Cu vacancies and promote dispersion of Zn to its atomic levels. Sn and Zn single sites as the co-promoters cooperatively generate electronic interaction with the CuO support, which further facilitates the adsorption of the reactant molecules on the surface, thereby leading to the superior catalytic performance. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ZINC catalysts
*DENSITY functional theory
*CATALYSTS
*CATALYST selectivity
Subjects
Details
- Language :
- English
- ISSN :
- 20955138
- Volume :
- 7
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- National Science Review
- Publication Type :
- Academic Journal
- Accession number :
- 143123658
- Full Text :
- https://doi.org/10.1093/nsr/nwz196