Bifunctional Oxygen Reduction and Evolution Activity in Brownmillerites Ca₂Fe_(1-x)Co _x O₅.

ABSTRACT: State-of-the-art catalysts for oxygen reduction and evolution reactions (ORR and OER), which form the basis of advanced fuel cell applications, are based on noble metals such as Pt and Ir. However, high cost and scarcity of noble metals have led to an increased demand of earth-abundant metal oxide catalysts, especially for bifunctional activity in ORR and OER. The fact that Pt and Ir or C, the cost-effective alternatives suggested, do not display satisfactory bifunctional activity has also helped in turning the interest to metal oxides which are stable under both ORR and OER conditions. Brownmillerite A₂B₂O₅ type oxides are promising as bifunctional oxygen electrocatalysts because of intrinsic structural features, viz., oxygen vacancy and catalytic activity

SUBMITTER: Thundiyil S 

PROVIDER: S-EPMC6648611 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature