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IJC-A Vol.48A(10) [October 2009] >

Title: High surface area Ce0.9Cu0.1O2- and Ce0.9Mn0.1O2- solid solutions for CO and HCHO oxidation
Authors: Liu, Xue-Song
Lu, Ji-Qing
Jin, Ling-Yun
Xiao, Xiao-Yan
Luo, Meng-Fei
Keywords: Catalysts
Solid solutions
Sol-gel process
Carbon monoxide
Issue Date: Oct-2009
Publisher: CSIR
IPC CodeInt. Cl.9 C07B33/00; C01J21/00; C01J37/00
Abstract:  Ce0.9Cu0.1O2- and Ce0.9Mn0.1O2- solid solutions with high surface area (> 100 m2 g-1) have been prepared by a modified citrate sol-gel method. XRD results confirm the formation of Ce0.9X0.1O2- (where X = Cu or Mn) solid solution. Raman results indicate that a higher concentration of oxygen vacancies is obtained on the Ce0.9Cu0.1O2- catalyst compared to that of Ce0.9Mn0.1O2-. In situ DRIFTS results show the chemisorption of CO on the Ce0.9Cu0.1O2- catalyst, but there is no chemisorption of CO on the Ce0.9Mn0.1O2- catalyst. For CO oxidation, Ce0.9Cu0.1O2- shows higher activity than Ce0.9Mn0.1O2-, due to the higher concentration of oxygen vacancies and the strong chemisorption of CO on the catalyst. For HCHO oxidation, Ce0.9Mn0.1O2- shows slightly higher activity than Ce0.9Cu0.1O2-, due to the fact that the lattice oxygen is more easily reducible in Ce0.9Mn0.1O2- than in Ce0.9Cu0.1O2-.
Page(s): 1352-1357
ISSN: 0975-0975 (Online); 0376-4710 (Print)
Source:IJC-A Vol.48A(10) [October 2009]

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