The catalytic activity of Sr2PdO3, prepared through the
sol-gel
citrate-combustion method for the
oxygen evolution reaction (OER) in a 0.1 M HClO4
solution, was investigated. The electrocatalytic activity of Sr2PdO3 toward OER was assessed via the anodic potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The glassy
carbon modified Sr2PdO3 (GC/Sr2PdO3)
electrode exhibited a higher electrocatalytic activity, by about 50 times, in comparison to the unmodified
electrode. The order of the reaction was close to unity, which indicates that the adsorption of the
hydroxyl groups is a fast step. The calculated activation energy was 21.6 kJ.mol-1, which can be considered a low value in evaluation with those of the reported OER electrocatalysts. The Sr2PdO3
perovskite portrayed a high catalyst stability without any probability of catalyst
poisoning. These results encourage the use of Sr2PdO3 as a candidate electrocatalyst for water splitting reactions.