The reaction mechanism of the O2 reduction at LaNiO3 was studied by using a rotating ring-disc electrode, which consists of a LaNiO3 disc and Pt ring electrodes. It was found that the O2 was completely reduced to OH− on the Hoare path. Oxygen vacancies seem to be required in the oxide surface for reduction of adsorbed O2H− to OH−.
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Matsumoto et al. (1978) studied this question.
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