“…A number of perovskite materials have been investigated as potential candidates for applications of OER/ORR. , Perovskite ABO 3 oxides, consisting of the larger A-site cations and smaller B-site cations, possess large compatibility for the mismatches of the ionic radius sizes between A and B-site cations. − As most of the B-site ions are transition metal ions (Co, Ni, Fe), the large number of enriched ions could provide a strong catalytic performance and hence enhance ORR kinetic processes. La 0.8 Sr 0.2 MnO 3 (LSM) is the most widely studied single perovskite material for ORR .…”