Preparation and Catalytic Performance of Multicomponent Cu3Si-ZnO-CuP-Sn/Cu-Cu2O-CuO Catalysts
Research on the catalytic performance of multicomponent copper-based catalysts for the synthesis of dimethyldichlorosilane(Rochow reaction)is a current hot topic in academia.This study successfully prepared a novel Cu3Si-ZnO-CuP-Sn/Cu-Cu2O-CuO multicomponent catalyst via ball milling technology.Its catalyt-ic properties in the synthesis of dimethyldichlorosilane were thoroughly investigated.Experimental results revealed that this catalyst exhibited exceptional catalytic performance in the synthesis process,with selectivity and yield improving from 54.1％and 3.3％to 85.7％and 29.1％,respectively,compared to the traditional Cu-Cu2O-CuO catalyst.Techniques such as XPS,SEM,and XRD were utilized to reveal that this catalyst contains the high-est concentration of Cu+ions.Density Functional Theory(DFT)calculations were conducted to explore effective charge transfer between Cu-Cu2O-CuO and Cu3Si,which is crucial for enhancing the catalytic activity in the Rochow reaction.The introduction of multiple components not only facilitated the formation of more CuxSi but also accelerated the reaction process,significantly enhancing the selectivity and yield of the target product.Additional-ly,the study proposed the catalytic reaction mechanism of the multicomponent catalyst,highlighting the essential role of the promoters Cu3Si,Zn,P,and Sn in promoting the formation of CuxSi through diffusion interactions be-tween Cu and Si.
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