摘 要:Nanocrystalline Ni-Mo-Fe alloy deposits were obtained by electrodeposition.The structures of the alloy deposits were analyzed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS).The XRD results of nanocrystalline Ni-Mo-Fe alloy deposit show that many diffraction lines disappear,and that there is only one diffraction peak at 44.0°.The XPS results of nanocrystalline Ni-Mo-Fe alloy deposits indicate that the nickel,molybdenum and iron of the deposits exist in metallic state,and that the binding energy of the alloyed elements increases to some extent.The nanocrystalline Ni-Mo-Fe alloy deposit electrode may offer better electrocatalytic activity than the polycrystalline nickel eletrode and the nanocrystalline Ni-Mo alloy electrode.The electrochemical impedance spectra from the nanocrystalline Ni-Mo-Fe alloy electrode indicate that hydrogen evolution in 30%(m/m) KOH at lower overpotential is in accordance with the Volmer-Tafel mechanism,but with the Volmer-Heyrovsky mechanism at higher overpotential.
