A Bifunctional Perovskite Catalyst for Oxygen Reduction and Evolution

La-0.3(Ba0.5Sr0.5)(0.7)Co0.8Fe0.2O3- is a promising bifunctional perovskite catalyst for the oxygen reduction reaction and the oxygen evolution reaction. This catalyst has circa 10nm-scale rhombohedral LaCoO3 cobaltite particles distributed on the surface. The dynamic microstructure phenomena are attributed to the charge imbalance from the replacement of A-site cations with La3+ and local stress on Co-site sub-lattice with the cubic perovskite structure.