Citation:
SONG Li-Jun, MENG Hui-Min. Electrodeposition of Nanocrystalline Nickel Alloys and Their Hydrogen Evolution in Seawater[J]. Acta Physico-Chimica Sinica,
;2010, 26(09): 2375-2380.
doi:
10.3866/PKU.WHXB20100847
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Ni, Ni-Fe, and Ni-Fe-C alloy electrodes were prepared by electrodeposition. Polarization curves showed that the Ni-Fe-C alloy electrode shows the best electrocatalytic activity for the hydrogen evolution reaction (HER) in a simulated seawater solution (0.5 mol·L-1NaCl, pH=12) at a temperature of 90 °C. The effect of morphology, composition and crystal structure on hydrogen evolution was studied by scanning electron microscope (SEM), X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM).We found that the grain size of the electrodes affect their electrocatalytic activity for the HER. A smaller grain size benefits the catalytic performance. Electrochemical impedance spectroscopy (EIS) indicated that an increase in active sites and intrinsic electrocatalytic activity is important for a major increase in the electrode catalytic activity for the HER.
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