Abstract
Oxygen evolution reactions on SrFeO 3 were investigated in alkaline and acidic solutions. It was found that the catalytic activity for the oxygen evolution reaction in the alkaline solution is high. The following reaction steps (V)+Fe+2H 2O→(O)+FeOH 2+2H ++2e − in acidic solution and FeOH+OH −→FeO −+H 2O in alkaline solution are presumed to be rate-controlling in the anodic evolution of oxygen on SrFeO 3 electrode, where (V) denotes oxygen vacancy on the electrode surface. The reaction mechanism and the catalytic property are discussed in connection to the band structure of the oxide.
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