Fe(iii) doped NiS2 nanosheet: a highly efficient and low-cost hydrogen evolution catalyst

We synthesized Fe-NiS₂ nanosheet sample with the good electrocatalytic HER performance of a low Tafel slope of 37 mV dec⁻¹ and a small overpotential of 121 mV at 10 mA cm⁻², also the considerable stability.