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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 13, Number 5
BKCSDE 13(5)
May 20, 1992 

Kinetics and Mechanisms of the Oxidation of Carbon Monoxide on Eu1-xSrxCoO3-y Perovskite Catalysts
Dong Hoon Lee, Joon Ho Jang, Hong Seok Kim, Yoo Young Kim, Jae Shi Choi, Keu Hong Kim*
The catalytic oxidation of CO on perovskite Eu1-xSrxCoO3-y, has been investigated at reaction temperatures from 100 to 250℃ under stoichiometric CO and O2 partial pressures. The microstructure and Sr-substitution site of the catalyst were studied by means of infrared spectroscopy. The reaction rates were found to be correlated with 1.5-and 1.0-order kinetics with and without a CO2 trap, respectively; first-and 0.5-order with respect to CO and 0.5-order to O2 with the activation energy of 0.37 eV mol-1. It was found from IR, σ and kinetic data that O2 adsorbs as an ionic species on the oxygen vacancies, while CO adsorbs on the lattice oxygens. The oxidation reaction mechanism is suggested from the agreement between IR, σ and kinetic data.
511 - 516
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