A highly active CuZn–SiO₂ catalyst with excellent stability in hydrogenation of methyl acetate (MA) was fabricated by the hydrolysis precipitation (HP) method. The HP method caused notable high dispersion of both copper and zinc species due to the strong interaction between metal species and silica support caused by the pseudo-homogeneous reaction during the mixing process. According to the linear correlation between the TOF (Cu⁺) and Zn/Cu ratio, the Cu⁺ was considered the predominant active site, and the Cu⁺ site derived from the strong interaction between copper and zinc species has higher activity than those Cu⁺ species generated from copper phyllosilicate. Compared to the CuZnO/Al₂O₃ and Cu–SiO₂ catalysts, the Cu₉Zn₁–SiO₂ catalyst displayed the highest catalytic activity on account of the high dispersion of active species and the enhanced ability of Cu⁺ species on ester adsorption by stronger Cu-ZnO interaction.

中文翻译：

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水解沉淀法制备有效的CuZn-SiO ₂双金属催化剂，用于乙酸甲酯加氢制乙醇

通过水解沉淀（HP）法制得了一种高活性CuZn-SiO ₂催化剂，该催化剂在乙酸甲酯（MA）的加氢中具有出色的稳定性。由于混合过程中拟均相反应引起的金属物种与二氧化硅载体之间的强相互作用，HP方法导致了铜和锌物种的显着高分散。根据TOF（Cu ⁺）与Zn / Cu比之间的线性关系，认为Cu ⁺是主要的活性位点，并且由于铜和锌物种之间的强相互作用而产生的Cu ⁺位点的活性高于Cu ^+。层状硅酸铜产生的物种。与CuZnO / Al ₂相比O ₃和Cu-SiO ₂催化剂中，Cu ₉ Zn ₁ -SiO ₂催化剂表现出最高的催化活性，这归因于活性物质的高分散性以及更强的Cu-ZnO相互作用增强了Cu ⁺物质对酯的吸附能力。