Hydrogen evolution boosted by moderate Co3ZnC with current densities beyond 1000 mA cm−2

Abstract

Co₃ZnC can efficiently boost the activity of Co@N, O co-doped carbons for hydrogen evolution. The results show that moderate Co₃ZnC plays key roles in achieving an appropriate weighted Co 3d band centre, enhancing charger transfer and thus optimizing the electrochemical active surface area. Thus, a low overpotential of ∼219 mV can drive a high current density of 1000 mA cm⁻² under the favourable condition of moderate Co₃ZnC.