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- Title
Single-atom Sn-Zn pairs in CuO catalyst promote dimethyldichlorosilane synthesis.
- Authors
Shi, Qi; Ji, Yongjun; Chen, Wenxin; Zhu, Yongxia; Li, Jing; Liu, Hezhi; Li, Zhi; Tian, Shubo; Wang, Ligen; Zhong, Ziyi; Wang, Limin; Ma, Jianmin; Li, Yadong; Su, Fabing
- 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.
- Subjects
ZINC catalysts; DENSITY functional theory; CATALYSTS; CATALYST selectivity
- Publication
National Science Review, 2020, Vol 7, Issue 3, p600
- ISSN
2095-5138
- Publication type
Article
- DOI
10.1093/nsr/nwz196