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Oxidation of chromium and nickel covered by thin overlayers of cerium have been studied by X-ray photoelectron spectroscopy. Cerium showed no catalytic effect on the oxidation rates of the transition metal substrates. This observation is in contrast to recent results on the oxidation of Nb. The oxide growth on Cr follows a parabolic law, whereas on Ni the growth law is found to be logarithmic in the early stages of oxidation.
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Braaten et al. (1988) studied this question.
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