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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 shu

Electrodeposition of Nanocrystalline Nickel Alloys and Their Hydrogen Evolution in Seawater

1.
Corrosion and Protection Center, School of New Material Technology, University of Science and Technology Beijing, Beijing 100083, P. R. China

Received Date: 3 March 2010
Available Online: 7 July 2010

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.
- Electrodeposition,
- Catalytic activity,
- Hydrogen evolution reaction,
- Nanocrystalline nickel alloy
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