Highly efficient electrocatalysts for oxygen reduction reaction

Highly efficient and chemically compatible Ln(x)Sr(1-x)CoO(3-delta) ( Ln = La, Sm, Gd,.)/Co3O4 electrocatalysts for oxygen reduction reaction are presented and the very low cathode polarization resistances and excellent performances implied their promising application for developing intermediate-temperature solid oxide fuel cells (SOFCs), as well as potential application for oxygen separation membranes.