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

In this paper, we demonstrate the first preparation of NiS 2 nanosheets array on carbon cloth (NiS 2 NA/CC) via sulfidization of its Ni(OH) 2 NA/CC precursor. As a 3D hydrogen evolution cathode, the NiS 2 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/cm 2 , respectively. This electrode also works efficiently in basic solutions.