CO Oxidation over Nanostructured Ceria Supported Bimetallic Cu–Mn Oxides Catalysts : Effect of Cu/Mn Ratio and Calcination Temperature

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

5 Scopus Citations
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Author(s)

  • Yafei Guo
  • Xiao Chen
  • Changhai Li
  • Shouxiang Lu

Detail(s)

Original languageEnglish
Pages (from-to)181-193
Journal / PublicationCatalysis Letters
Volume148
Issue number1
Online published29 Oct 2017
Publication statusPublished - Jan 2018

Abstract

Nanostructured CeO2 supported CuO–MnO2 (CuMn/Ce) catalysts were synthesized by wet co-impregnation method and compared with CuO/CeO2 and MnO2/CeO2 catalysts on CO oxidation. The former shows significantly higher catalytic activity toward CO oxidation than the bimetallic oxides catalysts with minimum T50. Dual synergistic effects in the interfaces of CuO–MnO2 and CuO–CeO2 shall be responsible for the higher oxidation performance of CuMn/Ce catalyst. As Cu/Mn mass ratio varies from 1/0.2 to 1/9, CO oxidation activities of the catalysts present unimodal distribution, and the catalyst with Cu/Mn = 1/1 shows the highest performance (T50 = 45.8 °C; Ea = 24.11 kJ mol−1). Cu acts as CO dissociative adsorption sites, and Mn–Ce supplies activated O species from gas molecule and lattice oxygen, which are both indispensable for improving utilization efficiency of the reactants in the dual redox processes. The catalytic performance of catalyst is also vitally correlated with calcination temperature (160–320 °C). The optimum calcination temperature of CuMn/Ce catalyst is 320 °C. Catalyst characterization results indicate that the pretreatment at 320 °C is decent to obtain desired metal oxides along with fine texture properties.

Research Area(s)

  • CO oxidation, Copper manganese oxides, Heterogeneous catalysis, Nanostructured ceria, Synergistic effect

Citation Format(s)

CO Oxidation over Nanostructured Ceria Supported Bimetallic Cu–Mn Oxides Catalysts : Effect of Cu/Mn Ratio and Calcination Temperature. / Lin, Jin; Guo, Yafei; Chen, Xiao; Li, Changhai; Lu, Shouxiang; Liew, Kim Meow.

In: Catalysis Letters, Vol. 148, No. 1, 01.2018, p. 181-193.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review