Discontinuously covered IrO2–RuO2@Ru electrocatalysts for the oxygen evolution reaction: how high activity and long-term durability can be simultaneously realized in the synergistic and hybrid nano-structure

A supported IrO₂–RuO₂@Ru (3 : 1) catalyst exhibits an IrO₂-enriched surface and the intrinsic activity is enhanced obviously compared to that of an alloyed Ir₃RuO₂ catalyst.