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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 5, Number 1
BKCSDE 5(1)
January 20, 1984 

 
Title
Kinetics and Mechanisms of the Oxidation of Carbon Monoxide on Ni-Doped α-Fe2O3
Author
Keu Hong Kim, Jong Ho Jun, Shi Choi
Keywords
Abstract
The oxidation of carbon monoxide has been investigated on Ni-doped α-Fe2O3 catalyst at 300 to 450℃. The oxidation rates have been correlated with 1.5-order kinetics; first with respect to CO and 1/2 with respect to O2. Carbon monoxide is adsorbed on lattice oxygen of Ni-doped α-Fe2O3, while oxygen appears to be adsorbed on oxygen vacancy formed by Ni-doping. The conductivities show that adsorption of CO on O-lattice produces conduction electron and adsorption of O2 on O-vacancy withdraws the conduction electron from vacancy. The adsorption process of CO on O-lattice is rate-determining step and dominant defect of Ni-doped α-Fe2O3 is suggested from the agreement between kinetic and conductivity data.
Page
41 - 44
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