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采用水热法合成不同极化率的ZnO载体来制备Cu/ZnO催化剂,研究了ZnO极化率对Cu/ZnO催化剂的物理化学性质和催化活性的影响。通过对样品进行N_2-吸附、SEM、TPR、XPS、XRD、ICP-OES和N_2O滴定等表征,发现极化率对催化剂的物理结构性质和铜物种的分散状态影响不大,但强烈影响Cu/ZnO催化剂的催化活性。随着极化率降低,催化活性先上升后下降。高极化率的催化剂由于具有更多的ZnO_x氧缺陷结构和更强的Cu-ZnO相互作用,利于Cu-ZnO_x的形成。
ZnO catalysts with different polarizabilities were synthesized by hydrothermal method to prepare Cu / ZnO catalysts. The effects of ZnO polarization on the physicochemical properties and catalytic activity of Cu / ZnO catalysts were investigated. The results showed that the polarizability had little effect on the physical structure of the catalyst and the dispersion status of the copper species, but strongly influenced the Cu / Catalytic activity of ZnO catalysts. With the decrease of polarizability, the catalytic activity first increased and then decreased. The catalyst with high polarizability is conducive to the formation of Cu-ZnO_x due to the more ZnO_x oxygen defect and the stronger Cu-ZnO interaction.