A kind of highly catalytic electrode for the hydrogen evolution reaction (HER) was prepared by composite coating of nanocrystalline Ni-Mo alloy particles, made from high energy mechnical ball mill, on nickel base. The size of the nanocrystal of Ni-Mo alloy and the composition of the composite coating were measured by XRD and XPS. The electrochemical behaviour of the electrode for HER was studied by using of steady polarization and a. c. impedance technique. It is shown that the electrocatalytic activity of the electrode is enhanced with increasing of molybdenum content in the composite coating and the reaction rate was determined by the electrodesorption step.

Key words: ELECTRODE, NICKEL ALLOYS, X-RAY DIFFRACTION ANALYSIS, ELECTROPLATING, X-RAY PHOTOELECTRON SPECTROMETRY, MOLYBDENUM ALLOYS, CATALYTIC ACTIVITY, NANOPHASE MATERIALS