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KMID : 1059519850290020111
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Journal of the Korean Chemical Society
1985 Volume.29 No. 2 p.111 ~ p.120
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Doping Effect of CdO on the Oxidation of Carbon Monoxide over CdO-α-Fe2O3 System
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Lee Sung-Han
Kim Yong-Rok
Kim Keu-Hong
Choi Jae-Shi
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Abstract
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The oxidation reaction of CO on the catalysts 4 mol%, 8 mol%, and 12 mol% Cd-doped α-Fe2O3 is individually investigated. Regardless of Cd doping level, over-all reaction order for the oxidation of CO is 1.5; the first order with respect to CO and the one-half order with respect to O2. Over the temperature range of 350∼460℃, the activation energy for CO oxidation is 10.10∼11.30Kcal/mol. From the agreement between the kinetic data and conductivity measurements, the reaction mechanism is suggested. Especially from the effect of Cd doping, the fact that catalytic activity of α-Fe2O3 is due to the excitation of electrons which are traped on oxygen vacancy is found, and the adsorption sites for reactant molecules are found.
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