Commercial nonsupported Cu-based catalysts have to be mixed with various promoters to enhance their catalytic performance in the Rochow-Müller reaction. However, considerable debates still exist at a fundamental level on how these promoters function. Herein, we systematically investigated the effects of ZnO, Sn, and P promoters on the catalytic property of the CuO/SiO₂ catalyst for synthesizing dimethyldichlorosilane (M2) via the Rochow-Müller reaction. A series of CuO/SiO₂ catalysts containing these promoters were prepared by the ball-milling method. The CuO/SiO₂ catalyst with the coexistence of ZnO, P, and Sn promoters showed the highest catalytic activity, even superior to the commercial nonsupported Cu-based catalysts. Detailed characterizations showed the increased capability for oxygen adsorption on the CuO surface and dissociative chemisorption of methyl chloride led to the improved catalytic performance. This work deciphers the promoter mechanism and demonstrates a promising strategy for the efficient synthesis of M2.

商业非负载型铜基催化剂必须与各种促进剂混合，以提高其在 Rochow-Müller 反应中的催化性能。然而，关于这些启动子如何发挥作用，在基本层面上仍然存在相当大的争论。在此，我们系统地研究了 ZnO、Sn 和 P 助剂对通过 Rochow-Müller 反应合成二甲基二氯硅烷 (M2)的 CuO/SiO _{2催化剂催化性能的影响。}通过球磨法制备了一系列含有这些促进剂的CuO/SiO _{2催化剂。}CuO/SiO ₂ZnO、P 和 Sn 助催化剂共存的催化剂表现出最高的催化活性，甚至优于商业上的非负载型铜基催化剂。详细的表征表明，CuO 表面上氧吸附能力的提高和氯甲烷的解离化学吸附能力提高了催化性能。这项工作破译了启动子机制，并展示了一种有效合成 M2 的有前景的策略。