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Catalytic behavior and synergistic effect of nanostructured mesoporous CuO-MnOx-CeO2 catalysts for chlorobenzene destruction
He, Chi; Yu, Yanke; Shen, Qun; Chen, Jinsheng; Qiao, Nanli
2014
Source PublicationAPPLIED SURFACE SCIENCE
ISSN0169-4332
Volume297Issue:1Pages:59-69
AbstractMesoporous CuO-MnOx-CeO2 composite metal oxides with different copper and manganese loadings were prepared by a urea-assistant hydrothermal method, and were further adopted for the complete catalytic combustion of chlorobenzene. The effects of reaction conditions such as inlet reagent concentration and water feed concentration on chlorobenzene combustion were also studied. The structure and textural properties of the synthesized catalysts were characterized via the XRD, N-2 adsorption/desorption, FE-SEM, TEM, H-2-TPR, O-2-TPD, and XPS techniques. The characterization results reveal that the presence of a small amount of Mn species can facilitate the incorporation of Cu and Mn ions into ceria lattice to form Cu-Mn-Ce-O solid solution. The synergistic effect of Cu and Mn species can reduce the redox potential of the composite catalysts, and produce large amounts of oxygen vacancies in the interface of CuOx, MnOx, and CeO2 oxides. The catalyst with Cu/Mn atomic ratio of 1/1 exhibits the best chlorobenzene elimination capability, oxidizing about 95% of the inlet chlorobenzene at 264 degrees C with CO2 selectivity higher than 99.5%. The concentration and mobility of the chemically adsorbed oxygen are vital for the effective removal of surface Cl species, which inhibits the dissociation of oxygen molecules and decreases the reducibility of the copper and manganese species. It can be rationally concluded that the superior catalytic performance and durability of the mesoporous CuO-MnOx-CeO2 composite oxides are primarily attributed to the higher surface oxygen concentration and better active oxygen mobility. (C) 2014 Elsevier B.V. All rights reserved.
Department环境化学与生态毒理学国家重点实验室
KeywordMesoporous Cumnceox Chlorobenzene Catalytic Combustion Reaction Conditions Synergistic Effect Catalyst Deactivation
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Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/9323
Collection环境纳米技术与健康效应重点实验室
Recommended Citation
GB/T 7714
He, Chi,Yu, Yanke,Shen, Qun,et al. Catalytic behavior and synergistic effect of nanostructured mesoporous CuO-MnOx-CeO2 catalysts for chlorobenzene destruction[J]. APPLIED SURFACE SCIENCE,2014,297(1):59-69.
APA He, Chi,Yu, Yanke,Shen, Qun,Chen, Jinsheng,&Qiao, Nanli.(2014).Catalytic behavior and synergistic effect of nanostructured mesoporous CuO-MnOx-CeO2 catalysts for chlorobenzene destruction.APPLIED SURFACE SCIENCE,297(1),59-69.
MLA He, Chi,et al."Catalytic behavior and synergistic effect of nanostructured mesoporous CuO-MnOx-CeO2 catalysts for chlorobenzene destruction".APPLIED SURFACE SCIENCE 297.1(2014):59-69.
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