Catalytic Properties of Iron Oxides. II. Isotopic Exchange of Oxygen, Oxidation of Carbon Monoxide, and Reduction-Oxidation Mechanism
- 1 February 1980
- journal article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 53 (2) , 324-329
- https://doi.org/10.1246/bcsj.53.324
Abstract
The reactivity and mobility of the lattice oxygen of iron oxide, in particular γ-Fe2O3, has been investigated by 18O-exchange with CO2 and CO oxidation by 18O2. The low mobility of the lattice oxygen is in agreement with the reduction-oxidation mechanism of γ-Fe2O3 bulk, which proceeds by Fe ion migration without diffusion of the lattice oxygen. The rapid diffusion of the Fe ion makes the redox cycles of γ-Fe2O3 easy and explains, together with the cation deficient structure, the high reactivity and selectivity of lattice oxygen. Thus, γ-Fe2O3may be regarded as a new prototype of selective catalyst for allylic oxidation.Keywords
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