Reduction effect on cerium oxide catalysts doped with copper(II) ions. An electron paramagnetic resonance study
- 1 January 1992
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions
- Vol. 88 (9) , 1321-1325
- https://doi.org/10.1039/ft9928801321
Abstract
The reduction effect on CuCe oxide catalysts with an atomic ratio Cu : Ce = 0.01 has been studied mainly by EPR techniques. The surface species of copper(II) ion pairs and their precursors (Cu2+ ion monomers) were easily reducible by H2, C2H4 and CO. A bronze-like complex (HxCuCeO2) has been obtained before the beginning of the effective reduction of Cu2+ by heating the solid in the presence of hydrogen or ethene. Ce3+ ions have been evidenced near the solid surface during the reduction. By adsorption of CO molecules, CO– 2 radicals have been formed on the catalyst surface.Keywords
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