Coupling Interface Construction of Ni(OH)₂/MoS₂ Composite Electrode for Efficient Alkaline Oxygen Evolution Reaction

Abstract

The transition metal-based catalysts have excellent electrochemical oxygen evolution reaction catalytic activity in alkaline electrolytes, attracting a significant number of researchers’ attention. Herein, we used two-step hydrothermal and solvothermal methods to prepare a Ni(OH)2/MoS2/NF electrocatalyst. The electrocatalyst displayed outstanding OER activity in 1.0 M KOH electrolyte with lower overpotential (296 mV at 50 mA·cm−2) and remarkable durability. Comprehensive analysis shows that reinforcement of the catalytic function is due to the synergistic effect between Ni(OH)2 and MoS2, which can provide more highly active sites for the catalyst. This also provides a reliable strategy for the application of heterogeneous interface engineering in energy catalysis.

Keywords

• oxygen evolution reaction
• solvothermal
• Ni(OH)₂/MoS₂
• heterostructures
• synergistic effect
• electrocatalyst