Journal of Materials Science

, Volume 26, Issue 17, pp 4818–4822 | Cite as

Reduction reaction of lanthanum-added cerium dioxide with carbon monoxide

  • M. Ozawa
  • M. Kimura
  • A. Isogai


The reaction of lanthanum-added cerium dioxide with carbon monoxide was examined by using a CO pulse reaction method and high-temperature X-ray diffraction (XRD). The lanthanum addition enhanced the activity of cerium dioxide for oxidizing carbon monoxide under moderately reducing conditions. Isothermal XRD observation at 500 and 700 °C indicated that the reduction reaction of CeO2 and La-added CeO2 with CO progressed in CO-N2 flowing gas. The kinetics of the reaction CeO2 + x/2CO → Cex1−x/4+Ce x 3+ O2−x/2 + x/2CO2 + x/2V0 was analysed by Jander's model: [1−(1−x)1/3]2=kt.


CeO2 Oxygen Vacancy Lattice Oxygen Pulse Number Cerium Dioxide 


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Copyright information

© Chapman & Hall 1991

Authors and Affiliations

  • M. Ozawa
    • 1
  • M. Kimura
    • 1
  • A. Isogai
    • 1
  1. 1.Toyota Central Research and Development Laboratories, Inc.AichiJapan

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