Journal
TRANSACTIONS OF THE INSTITUTE OF METAL FINISHING
Volume 79, Issue -, Pages 136-139Publisher
INST METAL FINISHING
DOI: 10.1080/00202967.2001.11871381
Keywords
nanocrystalline Ni-Mo alloy; electrodeposition; structure and hydrogen evolution
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Nanocrystalline Ni-Mo 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 shows that Ni-Mo alloy deposit with 15.2% molybdenum exhibits (111) preferred orientation, the lattice constant is larger than that of nickel metal. The XPS results on nanocrystalline Ni-Mo alloy deposits indicate that the nickel and molybdenum of the deposits exist in the metallic state, the binding energy of the alloyed elements increase to some extent. The nanocrystalline Ni-Mo alloy deposit electrode may offer better electrocatalytic activity than the polycrystalline nickel electrode. The electrochemical impedance spectra from the nanocrystalline Ni-Mo alloy electrode indicate that hydrogen evolution in 30% (mm) KOH is in accordance with the Volmer-Heyrovsky mechanism.
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