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

作　　者：Hanfeng Lu Xianxian Kong Haifeng Huang Ying Zhou Yinfei 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》2015年第6期102-107,共6页环境科学学报（英文版）

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 O2 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.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 O2 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：Cu-Mn-Ce mixed oxide Toluene Catalytic combustion Volatile organic compounds（VOCs） 

分 类 号：X701[环境科学与工程—环境工程] O643.3[理学—物理化学]