Co9 S8/Cu2 S Nanorod Arrays on Cu Foam as Highly Efficient Electrocatalyst for Hydrogen Evolution Reaction
Transition metal chalcogenides has been widely used in the preparation of high-efficiency electro-catalysts for hydrogen evolution by electrolysis due to their special composition,structure and function.In this work,Co9S8/Cu2S/CF nanocomposites were prepared on copper foam substrate by solvothermal method.The as-obtained materials were characterized by X-ray diffraction(XRD)、scanning electron microscope(SEM)and transmission electron microscopy(TEM)and their hydrogen evolution properties were investigat-ed.In 0.5 mol/L H2SO4 solution,phosphate buffer solution(PBS),and 1 mol/L KOH solution,to reach 10 mA.cm-2,overpotentials was only 82 mV,117 mV and 153 mV.In addition,the overpotential of the cata-lyst did not change significantly after hydrogen evolution reactions,indicating that the as-prepared catalyst had excellent electrochemical stability.Compared with the single Cu2S and Co9S8 materials,the catalytic activ-ity of Co9S8/Cu2S catalyst has a greater degree of improvement,which is mainly due to the catalytic activity of Co9S8 and Cu2S and the synergistic effect of Co-Cu.
water splittingself-supporting electrodeCo9S8/Cu2Ssolvothermal method
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