Novel B-site ordered double perovskite Ba2Bi0.1Sc0.2Co1.7O6−xfor highly efficient oxygen reduction reaction

Abstract
Double perovskite Ba2Bi0.1Sc0.2Co1.7O6−x (BBSC) demonstrates low polarization resistance between 600 and 750 °C due to the high oxygen reduction rate of BBSC as reflected by its large DV and k values, which are derived from the face centered cubic structure and high cobalt content.