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

作     者：Hanfeng Lu Xianxian Kong Haifeng Huang Ying Zhou Yinfei Chen 

作者机构：Institute of Catalytic Reaction Engineering College of Chemical Engineering Zhejiang University of Technology College of Biological and Environmental Engineering Zhejiang University of Technology 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2015年第27卷第6期

页      面：102-107页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

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) 

主　　题：Cu Mn Ce mixed oxide Toluene Catalytic combustion Volatile organic compounds(VOCs) 

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.