The mesoporous Co/SiO₂ catalysts with 10 wt.% Co loading were prepared by grind-impregnation method for CO₂ hydrogenation, and the mesoporous SiO₂ materials with different structures were used as the supports. The physicochemical properties of the Co/SiO₂ catalysts were characterized by TEM, BET, H₂-TPR, XRD, and CO₂-TPD. The results indicate that the pore size, specific surface area, and the Co° species crystallinity of the Co/SiO₂ catalyst increase with increasing crystallization temperature of preparing SiO₂ support. The Co/SiO₂ catalyst has the best CO₂ adsorption property when SiO₂ support is prepared at the crystallization temperature of 100 °C. The CO₂ reaction rate (CO₂ conversion) of the Co/SiO₂ catalysts is as follows: CK100 > CK080 > CK120 > CK060 > CK140 > CK040, and the CH₄ selectivity follows the order: CK100 > CK080 > CK120 > CK140 > CK060 > CK040, accompanied by a certain amount of by-product CO molecules. At 360 °C, the CO₂ reaction rate (CO₂ conversion) of the CK100 catalyst is up to 3.29 × 10⁻⁵ mol/g_cat/s (44.3%), the CH₄ and CO selectivity are 86.5% and 13.5%, respectively.

通过研磨浸渍法制备CO ₂负载量为10 wt。％的介孔Co / SiO ₂催化剂，并以结构不同的介孔SiO ₂材料为载体。通过TEM，BET，H ₂ -TPR，XRD和CO ₂ -TPD对Co / SiO ₂催化剂的理化性质进行了表征。结果表明，随着制备SiO ₂载体的结晶温度的升高，Co / SiO ₂催化剂的孔径，比表面积和Co°物种的结晶度增加。Co / SiO ₂催化剂具有最佳的CO ₂在100°C的结晶温度下制备SiO ₂载体时的吸附性能。Co / SiO ₂催化剂的CO ₂反应速率（CO ₂转化率）如下：CK100> CK080> CK120> CK060> CK140> CK040，CH _4的选择性依次为：CK100> CK080> CK120> CK140> CK060> CK040，并伴有一定量的副产物CO分子。在360°C下，CK100催化剂的CO ₂反应速率（CO ₂转化率）高达3.29×10 ^-5  mol / g _cat / s（44.3％），CH ₄和CO的选择性分别为86.5％和13.5％ ， 分别。