Activating basal-plane catalytic activity of two-dimensional MoS2 monolayer with remote hydrogen plasma

The remote hydrogen-plasma can controllably create S-vacancies on basal planes of 2d MoS2 monolayers. Our electrical studies show that the MoS2 basal planes are activated without obvious degradation in crystalline morphologies. The treated MoS2 shows superior electrocatalytic properties, where the overpotential (183 mV @10 mA/cm2) and Tafel slope (77.6 mV/dec) for hydrogen evolution reaction.205