MECHANISM OF OXYGEN REDUCTION AT A LaNiO3 ELECTRODE.

Abstract

The reaction mechanism of the O//2 reduction at LaNiO//3 was studied by using a rotating ring-disc electrode, which consists of a LaNiO//3 disc and Pt ring electrodes. It is found that the O//2 was completely reduced to OH** minus on the Hoare path. Oxygen vacancies seem to be required in the oxide surface for reduction of adsorbed O//2H** minus to OH** minus .