Facilitating active species by decorating CeO2 on Ni3S2 nanosheets for efficient water oxidation electrocatalysis

In the pursuit of stable, high performance Ni-based oxygen evolution reaction (OER) electrocatalysts, modifying local chemical compositions or fabricating hybrid nanostructures to generate abundant interfaces for improving water oxidation activity electrocatalysts has emerged as an effective strategy. Herein, we report facile development a Ni3S2-CeO2 nanostructure via electrodeposition method. Benefiting from strong interfacial interaction between Ni3S2 and CeO2, electron transfer is notably improved nanosheets significantly enhanced. 1.0 M KOH, electrocatalyst achieves current density 20 mA cm–2 at low overpotential 264 mV, which 92 mV lower than that Ni3S2. Moreover, exhibits superior electrochemical stability. Density functional theory calculations demonstrate enhanced OER electrocatalytic can be ascribed increase in binding strength intermediates interface.