CoCu-based catalysts are widely used in CO_x hydrogenation reactions to produce higher alcohols due to the C-C coupling ability of Co and the ability of Cu to produce alcohols. This work describes the role of easily happened CO₂ dissociation on the CoCu surface during the reaction, using different silica support to tune the metal—support interaction, and reaches different selectivity to ethanol. CoCu supported on mesoporous silica MCM-41 shows ethanol selectivity as high as 85.3%, and the ethanol space-time yield (STY) is 0.229 mmol/(g_metal·h), however, poor selectivity to ethanol as low as 28.8% is observed on CoCu supported on amorphous silica. The different selectivity is due to the different intensities of CO₂ dissociation on the catalysts. The adsorbed O^⋆ produced via CO₂ dissociation can occupy the cobalt hollow sites on CoCu surfaces, which are also the adsorption sites of C₁ intermediates for further C-C coupling.

由于Co的CC偶联能力和Cu的产醇能力，CoCu基催化剂被广泛用于CO _{x加氢反应以生产高级醇。}这项工作描述了在反应过程中CoCu 表面容易发生CO ₂解离的作用，使用不同的二氧化硅载体来调节金属-载体相互作用，并达到不同的乙醇选择性。介孔二氧化硅MCM-41负载CoCu的乙醇选择性高达85.3%，乙醇时空产率（STY）为0.229 mmol/（g_金属·h），但乙醇选择性低至28.8%。在无定形二氧化硅负载的 CoCu 上观察到。不同的选择性是由于CO _{2的不同强度}催化剂上的离解。CO ₂解离产生的吸附O ^⋆可以占据CoCu表面的钴空心位点，这些位点也是C ₁中间体的吸附位点，可进一步进行CC偶联。