Cu–Mn–Ce ternary mixed-oxide catalysts for catalytic combustion of toluene

查看全文 作　　者：Hanfeng [1]Lu;Xianxian [2]Kong;Haifeng [2]Huang;Ying [1]Zhou;Yinfei [1]Chen

机构地区：[1]Institute of Catalytic Reaction Engineering, College of Chemical Engineering, Zhejiang University of Technology;[2]College of Biological and Environmental Engineering, Zhejiang University of Technology

出　　处：《Journal of Environmental Sciences》索引2015年第27卷第6期,共6页

基　　金：the financial support from the Natural Science Foundation of China (No. 21107096);Zhejiang Provincial Natural Science Foundation of China (No. Y14E080008);the Commission of Science and Technology of Zhejiang province (No. 2013C03021);the Specialized Research Fund for the Doctoral Program of Higher Education (No. 20133317110004) 摘　　要：Cu–Mn, Cu–Mn–Ce, and Cu–Ce mixed-oxide catalysts were prepared by a citric acid sol–gel method and then characterized by XRD, BET, H_2-TPR and XPS analyses. Their catalytic properties were investigated in the toluene combustion reaction. Results showed that the Cu–Mn–Ce ternary mixed-oxide catalyst with 1:2:4 mole ratios had the highest catalytic activity, and 99% toluene conversion was achieved at temperatures below 220°C. In the Cu–Mn–Ce catalyst, a portion of Cu and Mn species entered into the Ce O_2 fluorite lattice, which led to the formation of a ceria-based solid solution. Excess Cu and Mn oxides existed on the surface of the ceria-based solid solution. The coexistence of Cu–Mn mixed oxides and the ceria-based solid solution resulted in a better synergetic interaction than the Cu–Mn and Cu–Ce catalysts, which promoted catalyst reducibility, increased oxygen mobility, and enhanced the formation of abundant active oxygen species. 关键词：复合氧化物催化剂铈催化剂铜锰催化燃烧甲苯三元柠檬酸溶胶-凝胶法混合氧化物

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Cu–Mn–Ce ternary mixed-oxide catalysts for catalytic combustion of toluene

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