Controlled synthesis of Ni(OH)2/Ni3S2hybrid nanosheet arrays as highly active and stable electrocatalysts for water splitting

Using Ni(OH)₂/Ni₃S₂-12h as a bifunctional water splitting catalyst, with an overpotential of ∼340 mV, which is obtained at a very low cell voltage of 1.57 V with a current density of 10 mA cm⁻²in 1.0 M KOH.