Mesocrystals, the non-classical crystals with highly ordered nanoparticle superstructures, have shown great potential in many applications because of their newly collective properties. However, there is still a lack of a facile and general synthesis strategy to organize and integrate distinct components into complex mesocrystals, and of reported application for them in industrial catalytic reactions. Herein we report a general bottom-up synthesis of CuO-based trimetallic oxide mesocrystals (denoted as CuO-M1O_x-M2O_y, where M1 and M2 = Zn, In, Fe, Ni, Mn, and Co) using a simple precipitation method followed by a hydrothermal treatment and a topotactic transformation via calcination. When these mesocrystals were used as the catalyst to produce trichlorosilane (TCS) via Si hydrochlorination reaction, they exhibited excellent catalytic performance with much increased Si conversion and TCS selectivity. In particular, the TCS yield was increased 19-fold than that of the catalyst-free process. The latter is the current industrial process. The efficiently catalytic property of these mesocrystals is attributed to the formation of well-defined nanoscale heterointerfaces that can effectively facilitate the charge transfer, and the generation of the compressive and tensile strain on CuO near the interfaces among different metal oxides. The synthetic approach developed here could be applicable to fabricate versatile complicated metal oxide mesocrystals as novel catalysts for various industrial chemical reactions.

介晶是具有高度有序的纳米粒子超结构的非经典晶体，由于其新的集体性质，在许多应用中显示出巨大潜力。然而，仍然缺乏一种简便且通用的合成策略来将不同的组分组织和整合到复杂的介晶中，也缺乏在工业催化反应中据报道的应用。本文中，我们报告了一种基于自下而上的CuO基三金属氧化物介晶的合成方法（表示为CuO-M1O _x -M2O _y，其中M1和M2 = Zn，In，Fe，Ni，Mn和Co），采用简单的沉淀方法，然后进行水热处理和通过煅烧的全同立构转化。当这些介晶用作催化剂通过Si盐酸盐化反应生产三氯硅烷（TCS）时，它们表现出优异的催化性能，同时提高了Si转化率和TCS选择性。特别是，TCS产量比无催化剂工艺的产量提高了19倍。后者是当前的工业过程。这些介晶的有效催化性能归因于可以有效促进电荷转移的明确定义的纳米级异质界面的形成，以及在不同金属氧化物之间的界面附近的CuO上产生的压缩应变和拉伸应变。