Construction of self-supporting bimetallic sulfide arrays as a highly efficient electrocatalyst for bifunctional electro-oxidation

Bimetal nickel–cobalt sulfide nanosheets grown on nickel foam (NCS/NF) exhibit superior OER and UOR activities with low potentials of 1.46 and 1.31 V at 10 mA cm −2 , and even good activity in alkaline water electrolytes.