Enhanced Acidic Oxygen Evolution Reaction Performance by Anchoring Iridium Oxide Nanoparticles on CoO.

The sluggish kinetics of the anodic process, known as the oxygen evolution reaction (OER), has posed a significant challenge for the practical application of proton exchange membrane water electrolyzers in industrial settings. This study introduces a high-performance OER catalyst by anchoring iridium oxide nanoparticles (IrO) onto a cobalt oxide (CoO) substrate via a two-step combustion method. The resulting IrO@CoO catalyst demonstrates a significant enhancement in both catalytic activity and stability in acidic environments.