The Ni-W-WC composite-coating electrode was prepared by electrolytic compos- ite-deposition. The characterization for the hydrogen evolution reaction(HER) was compared in 7 mol· L -1 KOH solution by steady-state polarization and AC impedance technique. The results show that the composite-coating electrode is catalytically more active than Ni-W electrode. The electro- catalytic activities of the composite-coating electrode are attributed to the increase in the real surface areas and the decrease in the standard free energy of activation. The stability test of the compos- ite-coating electrode shows excellent stability during long-term continuous electrolysis and good re- sistance against frequent power interruption on this electrode.
