Improving the intrinsic electrocatalytic hydrogen evolution activity of few-layer NiPS3 by cobalt doping†
Abstract
Here we demonstrate the improvement of the intrinsic electrocatalytic hydrogen evolution activity of NiPS3 by proper cobalt doping. The optimized Ni0.95Co0.05PS3 nanosheets display a geometric catalytic current density of −10 mA cm−2 at an overpotential of 71 mV vs. RHE and a Tafel slope of 77 mV dec−1 in 1.0 M KOH.