The activity of catalyst was improved with increasing CeO_2 content. The addition of CeO_2 was benefit to Cu dispersion and influence the distribution of Cu species on catalyst surface. Cu~+ could be stabilized in Ce-Zr-O lattice.

• 对催化剂中CeO_2含量的影响进行了研究，催化剂活性随CeO_2含量增大而升高，TPR和XPS分析发现，催化剂中CeO_2含量增大，有利于增大Cu在载体表面的分散度，添加CeO_2之后催化剂表面出现Cu~+，Cu的多价态特性增强了Ce的Redox能力；