NiS2 nanosheets array grown on carbon cloth as an efficient 3D hydrogen evolution cathode

In this paper, we demonstrate the first preparation of NiS2 nanosheets array on carbon cloth (NiS2 NA/CC) via sulfidization of its Ni(OH)2 NA/CC precursor. As a 3D hydrogen evolution cathode, the NiS2 NA/CC electrode shows excellent catalytic activity and stability in neutral solutions. It needs overpotentials of 193 and 243 mV to afford current densities of 2 and 10 mA/cm2, respectively. This electrode also works efficiently in basic solutions.