Perovskite-structured RFeO3 (R = Tm, La) over Nickel Foam for Robust Oxygen Evolution Reaction

Transition metal oxides have gained significant recognition for their remarkable catalytic performance in the oxygen evolution reaction (OER). Among this group, the perovskite-structured ABO3 compounds have emerged as prospective OER electrocatalysts, particularly when selections are made for the constituents occupying the A and B sites. Here, we employed a simple solid-state reaction method to synthesize perovskite-structured RFeO3 (R = Tm, La) and subsequently loaded them on high-conductive nickel foam (NF) for OER. The results reveal that RFeO3/NF (R = Tm, La) catalysts exhibit low overpotentials of 361 mV and 357 mV, respectively, for OER at a current density of 10 mA·cm-2, indicating substantial advancements in both catalytic activity and efficiency.