A Comparative Study of Supported and Bulk Cu–Mn–Ce Composite Oxide Catalysts for Low-Temperature CO Oxidation

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

2 Scopus Citations
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Author(s)

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

Detail(s)

Original languageEnglish
Pages (from-to)2348–2358
Journal / PublicationCatalysis Letters
Volume148
Issue number8
Early online date13 Jun 2018
Publication statusPublished - Aug 2018

Abstract

A series of supported and bulk Cu–Mn–Ce ternary oxide catalysts was synthesized by wet-impregnation (IM), deposition–precipitation (DP), traditional co-precipitation (CP), co-precipitation with cetyltrimethyl ammonium bromide (CC), and sol–gel (SG) methods. The supported catalysts (CuMn/Ce-IM, CuMn/Ce-DP) exhibited significantly higher activity for CO oxidation than the bulk catalysts (CuMnCe-CP, CuMnCe-CC and CuMnCe-SG). The improved performance could be attributed to the presence of more isolated CuO and MnOx entities on the surface of supported catalysts, which contributed to the efficient utilization of both lattice oxygen from CeO2 and spillover oxygen from surface MnOx. For bulk catalysts, major Cu–Mn species were doped to form (Formula presented.) solid solutions and a part of them were coated by ceria mechanically. Lowest 50% CO conversion temperature were achieved at 76.9 °C for CuMn/Ce-IM catalyst. Low-temperature CO oxidation activities of all catalysts were in the sequence of CuMn/Ce-IM > CuMn/Ce-DP > CuMnCe-SG > CuMnCe-CC > CuMnCe-CP. Graphical Abstract: [Figure not available: see fulltext.]

Research Area(s)

  • CO oxidation, Cu–Mn–Ce composite oxide catalysts, Heterogeneous catalysis, Synthesis methods

Citation Format(s)