Humid atmospheric pressure plasma jets exposed micro-defects on CoMoO4 nanosheets with enhanced OER performance

Abstract

Humid atmospheric pressure plasma jets (APPJs) sustained in an argon/water vapour mixture were adopted to treat CoMoO₄ nanosheets arrays, which resulted in micro-defects on the surface and the appearance of hydroxyl (OH⁻) groups absorbed on the nanosheets. Benefiting from these changes, the plasma treated CoMoO₄ exhibited similar catalytic property to RuO₂, an overpotential 70 mV lower than for pristine CoMoO₄ and maintained good stability after 30 hours for the water oxidation.