As compared with conventional nanocrystal systems, Cu-based mesocrystals have demonstrated distinct advantages in catalytic applications. Here, we report the preparation of a novel architectural Cu₂O@CuO catalyst system integrated with the core/shell and mesocrystal structures (Cu₂O@CuO MC) via a facile solvothermal process followed by calcination. The formation mechanism of the Cu₂O@CuO MC with hexapod morphology was deciphered based on a series of time-dependent experiments and characterizations. When applied as a Cu-based catalyst to produce trichlorosilane (TCS) via Si hydrochlorination reaction, the Cu₂O@CuO MC exhibited a much higher Si conversion, TCS selectivity, and stability than the catalyst-free industrial process and the Cu₂O@CuO catalyst with a core-shell nanostructure. The enhanced catalytic efficiency of the former is attributed to the collective effects from its quite rough surface for providing abundant adsorption sites, the ordered nanoparticle arrangement in the core and shell for generating strong synergistic effects, and the micrometer size for the improved structural stability. This work demonstrates a practical route for designing sophisticated architectural structures that combine several structural functions within one catalyst system and their catalysis applications.

与常规的纳米晶体系统相比，铜基介晶在催化应用中已显示出明显的优势。在这里，我们报告了一种新型的Cu ₂ O @ CuO新型建筑催化剂体系的制备，该体系通过容易的溶剂热过程和随后的煅烧与核/壳和介晶结构（Cu ₂ O @ CuO MC）集成在一起。基于一系列随时间变化的实验和表征，对具有六足形形态的Cu ₂ O @ CuO MC的形成机理进行了解释。当作为铜基催化剂用于通过Si盐酸化反应生产三氯硅烷（TCS）时，Cu ₂与无催化剂的工业过程和具有核-壳纳米结构的Cu ₂ O @ CuO催化剂相比，O @ CuO MC具有更高的Si转化率，TCS选择性和稳定性。前者的催化效率提高归因于其相当粗糙的表面（用于提供丰富的吸附位点），核和壳中的有序纳米粒子排列（用于产生强大的协同效应）以及微米尺寸（用于改进结构稳定性）的集体效应。这项工作展示了一种设计复杂的建筑结构的实用方法，该结构将一个催化剂系统及其催化应用中的多种结构功能结合在一起。