Advertisement

Effect of Textural Structure on the Catalytic Performance of LaCoO3 for CO Oxidation

Authors

  • Ping Xiao,

    1. Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs & Commission Ministry of Education, South-Central University for Nationalities, No. 182 Minzudadao, Wuhan 430074, Hubei (P.R. China), Fax: (+86) 27-67842752
    Search for more papers by this author
  • Prof. Junjiang Zhu,

    Corresponding author
    1. Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs & Commission Ministry of Education, South-Central University for Nationalities, No. 182 Minzudadao, Wuhan 430074, Hubei (P.R. China), Fax: (+86) 27-67842752
    • Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs & Commission Ministry of Education, South-Central University for Nationalities, No. 182 Minzudadao, Wuhan 430074, Hubei (P.R. China), Fax: (+86) 27-67842752===

    Search for more papers by this author
  • Hailong Li,

    1. Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs & Commission Ministry of Education, South-Central University for Nationalities, No. 182 Minzudadao, Wuhan 430074, Hubei (P.R. China), Fax: (+86) 27-67842752
    Search for more papers by this author
  • Wen Jiang,

    1. Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin, 150080 (P.R. China)
    Search for more papers by this author
  • Tao Wang,

    1. Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs & Commission Ministry of Education, South-Central University for Nationalities, No. 182 Minzudadao, Wuhan 430074, Hubei (P.R. China), Fax: (+86) 27-67842752
    Search for more papers by this author
  • Prof. Yujun Zhu,

    1. Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin, 150080 (P.R. China)
    Search for more papers by this author
  • Dr. Yanxi Zhao,

    Corresponding author
    1. Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs & Commission Ministry of Education, South-Central University for Nationalities, No. 182 Minzudadao, Wuhan 430074, Hubei (P.R. China), Fax: (+86) 27-67842752
    • Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs & Commission Ministry of Education, South-Central University for Nationalities, No. 182 Minzudadao, Wuhan 430074, Hubei (P.R. China), Fax: (+86) 27-67842752===

    Search for more papers by this author
  • Prof. Jinlin Li

    1. Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs & Commission Ministry of Education, South-Central University for Nationalities, No. 182 Minzudadao, Wuhan 430074, Hubei (P.R. China), Fax: (+86) 27-67842752
    Search for more papers by this author

Abstract

Bulk, supported, and porous perovskite LaCoO3 were prepared and their catalytic performances for CO oxidation were investigated. XRD, FTIR spectroscopy, SEM, TEM, and N2 physisorption measurements were performed to identify their structure, and temperature-programmed desorption of oxygen, temperature-programmed reduction by hydrogen, and X-ray photoelectron spectroscopy were conducted to study their physicochemical properties. With the change from bulk to nanoparticles and further to a porous structure, the series of LaCoO3 samples showed increased oxygen vacancies and improved oxidizing ability, which led to enhanced catalytic performances for CO oxidation. The correlation of the CO oxidation activity with the amount of exposed metal sites indicated that the Co ions should be the active site of the reaction. Comparison of the activation energy supported the changes observed in the activities.

Ancillary