Cauliflower-like Ni₃S₂ foam for ultrastable oxygen evolution electrocatalysis in alkaline seawater

It is of great importance to design and develop electrocatalysts that are both long-lasting and efficient for seawater oxidation. Herein, a three-dimensional porous cauliflower-like Ni₃S₂ foam on Ni foam (Ni₃S₂ foam/NF) is proposed as a high-performance electrocatalyst for the oxygen evolution reaction in alkaline seawater. The as-synthesis Ni₃S₂ foam/NF achieves exceptional efficacy, achieving a current density of 100 mA·cm⁻² at mere overpotential of 369 mV. Notably, its electrocatalytic stability extends up to 1000 h at 500 mA·cm⁻².