Developing effective catalysts for CO₂ hydrogenation to methanol is an important step to improve the efficiency of a promising process for green synthesis of fuels and chemicals. Optimizing the Cu dispersion is often the main goal in preparing Cu/ZnO-based catalysts due to the strong dependence of the catalytic activity on the Cu surface area. However, the catalytic properties are also related to the nature of the Cu-ZnO interface. Herein, a series of hydrotalcite-derived Cu/ZnO/Al₂O₃ catalysts were prepared for CO₂ hydrogenation to methanol. The preparation method results in partially embedded Cu particles within the Zn-Al oxide matrix. This microstructure exhibits significantly enhanced intrinsic activity and methanol selectivity. Loss of the interfacial area between Cu and Zn-Al mixed oxide phase due to sintering of Zn-Al matrix is identified as the main reason for deactivation of the HT-derived catalysts. The influence of In on Cu/ZnO-based catalysts is also investigated. It is found that In decreases the activity but increases the methanol selectivity and stabilizes the Cu particles and the Zn-Al mixed oxide phase. The lower activity of the In-containing catalysts is linked to the inhibition of Cu active sites by Cu_xIn_y species.

开发有效的 CO ₂加氢催化剂是提高燃料和化学品绿色合成工艺效率的重要一步。由于催化活性强烈依赖于 Cu 表面积，因此优化 Cu 分散通常是制备 Cu/ZnO 基催化剂的主要目标。然而，催化性能也与 Cu-ZnO 界面的性质有关。在此，针对CO ₂制备了一系列水滑石衍生的Cu/ZnO/Al ₂ O ₃催化剂。加氢制甲醇。该制备方法导致在 Zn-Al 氧化物基质中部分嵌入 Cu 颗粒。这种微结构表现出显着增强的本征活性和甲醇选择性。由于 Zn-Al 基体的烧结，Cu 和 Zn-Al 混合氧化物相之间的界面面积损失被认为是 HT 衍生催化剂失活的主要原因。还研究了 In 对 Cu/ZnO 基催化剂的影响。发现 In 降低了活性但增加了甲醇选择性并稳定了 Cu 颗粒和 Zn-Al 混合氧化物相。含 In 催化剂的较低活性与 Cu _x In _y物质对 Cu 活性位点的抑制有关。