Strontium cobalt oxychlorides: enhanced electrocatalysts for oxygen reduction and evolution reactions

Abstract

Cobalt-based layered perovskite oxychlorides Sr₂CoO₃Cl and Sr₃Co₂O₅Cl₂ exhibit high oxygen electrocatalytic activity compared to conventional lanthanum cobalt-based perovskite oxides. The enhanced oxygen electrocatalytic activity can be attributed to the upshifted O p-band center relative to the Fermi level caused by the incorporation of chloride anion into oxygen sites.