title: Cu-Mn-Ce ternary mixed-oxide catalysts for catalytic combustion of toluene.
abstract: 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, H2-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 CeO2 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.
authors.affiliation: Institute of Catalytic Reaction Engineering, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China. Electronic address: luhf@zjut.edu.cn.
authors.forename: Hanfeng
authors.initials: H
authors.lastname: Lu
authors.affiliation: College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310014, China.
authors.forename: Xianxian
authors.initials: X
authors.lastname: Kong
authors.affiliation: College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310014, China.
authors.forename: Haifeng
authors.initials: H
authors.lastname: Huang
authors.affiliation: Institute of Catalytic Reaction Engineering, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: Institute of Catalytic Reaction Engineering, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China. Electronic address: yfchen@zjut.edu.cn.
authors.forename: Yinfei
authors.initials: Y
authors.lastname: Chen
mesh_terms: D000393:Air Pollutants / Q000302:isolation & purification*; D002384:Catalysis; D002563:Cerium / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D006358:Hot Temperature; D017745:Incineration / Q000379:methods*; D008345:Manganese / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D056951:Photoelectron Spectroscopy; D013499:Surface Properties; D014050:Toluene / Q000302:isolation & purification*; D014961:X-Ray Diffraction
chemical_list: D000393:Air Pollutants; D010087:Oxides; D002563:Cerium; D014050:Toluene; D008345:Manganese; D003300:Copper
keywords: Catalytic combustion; Cu–Mn–Ce mixed oxide; Toluene; Volatile organic compounds (VOCs)