【摘要】 利用等体积浸渍法制备了CuO-CeO₂/TiO₂催化剂，用于低温CO氧化反应。考察了焙烧温度、Cu-Ce负载量和Ce/Cu摩尔比等对CuO-CeO₂/TiO₂催化性能的影响，利用XRD、N₂等温吸附-脱附、XPS、H₂-TPR等方法对催化剂进行了表征。结果表明，当nCe/nCu为1.6,Cu-Ce负载量为30%时，经500℃焙烧所制得催化剂具有最佳催化活性；当空速为24000mL/（g·h），在该催化剂上90℃时CO可完全氧化。表征发现，CuO-CeO₂/TiO₂催化剂表面较高的Ce³⁺、Cu⁺和吸附氧含量有利于催化CO氧化反应。制备条件通过影响催化剂表面的Ce³⁺、Cu⁺和吸附氧含量，影响催化剂活性。其中，焙烧温度、Cu-Ce负载量和nCe/nCu均会影响CuO-CeO₂/TiO₂表面Cu⁺和吸附氧含量，而催化剂表面Ce³⁺含量仅受Cu-Ce负载量的影响较大。更多还原

【Abstract】 CuO-CeO₂/TiO₂ catalyst was prepared by incipient impregnation method and then used for CO oxidation at low temperature. The effects of calcination temperature, Cu-Ce loading and Ce/Cu molar ratio on the catalytic performance of CuO-CeO₂/TiO₂ were investigated. The catalyst was characterized by XRD,N₂ isothermal adsorption-desorption, XPS and H₂-TPR. When nCe/nCu was 1.6, and Cu-Ce loading was 30%, the catalyst calcined at 500℃ showed the best catalytic activity. When GHSV was 24000mL/（g·h）,CO can be completely oxidized on the catalyst at 90℃. It was found that the high content of Ce³⁺, Cu⁺ and adsorbed oxygen on the surface of CuO-CeO₂/TiO₂ catalyst was favorable to catalyze CO oxidation. The preparation conditions could affect the catalyst activity by regulating the content of Ce³⁺, Cu⁺ and adsorbed oxygen on the catalyst surface. Among them, calcination temperature, Cu-Ce loading and nCe/nCu would influence the contents of Cu⁺ and adsorbed oxygen on CuO-CeO₂/TiO₂ surface, while Cu-Ce loading has greatly impact on the Ce³⁺ content on catalyst surface.更多还原