恒电位沉积法制备Cu掺杂Cu-CoS碱性析氢催化剂

mong the existing hydrogen production methods, electrolyzed water has the advantages ofhigh product purity, simple method and less pollution, but its shortcomings such as high overpotential, poor stability and expensive commercial catalysts (Pt/C, IrO2, etc.) need to be solved urgently.Cobalt-based compounds have high catalytic activity for electrolyzing water. In this paper, an efficient alkaline hydrogen evolution catalyst, Cu-CoS, was grown in situ on the surface of copper foam bypotentiostatic electrodeposition. The results show that the conductivity of the material is improved, theelectrochemical active surface area is increased, and the surface is super-hydrophobic. The overpotential required for Cu-CoS to reach the current density of ?10 mA/cm2is 69 mV, the slope of tafel is 58.56 mV/dec, and the potential increase is 45 mV after 60 h of stability test.