Abstract: The relation between the catalytic ability for hydrogen evolution reaction and the conditions of electrodeposition(electrode-position temperature, electrolysis time, electrodeposition current density, electrolyte composition in the bath)has been studied using steady-tate polarization and ac impedance techniques. The morphology of the composite coating surface of the electrodes and the composition of the composite coating are measured by SEMand EDS. The low hydrogen overpotential is obtained if the electrodes are prepared from the electrolyte containing molybdenum at 30℃, and by using a higher electrodeposition current density and a longer electrolysis time.e.g, 7200 seconds.

Key words: Ni-Mo alloy, hydrogen evolution reaction, nanocrystallite, composite electrodeposition-condition