Electrocatalytic Properties of Nickel Foam-Based Ni-Mo, Ni +Mo and Ni+Mo/Ni-Mo Electrodes for Hydrogen Evolution Reaction

Abstract:

Nickel foam-based Ni-Mo alloy electrodes, Ni+Mo composite electrodes and Ni+Mo/Ni-Mo composite alloy electrodes were prepared by eletrodeposition, and the electrocatalytic characteristics for hydrogen evolution reaction (HER) in 30wt% KOH solution were investigated by cathode polarization curve and electrochemical impedance spectroscopy (EIS). The experimental results show that in comparison with nickel foam electrodes, these electrodes exhibit a lower overpotential, a higher exchange current density and a larger real surface area for HER. At 30°C and current density of 200 mA/cm², the overpotentials of foam Ni electrodes, nickel foam-based Ni-Mo alloy electrodes, Ni+Mo composite electrodes, Ni+Mo/Ni-Mo electrodes are respectively 506, 252, 336, 202 mV. The nickel foam-based Ni+Mo/Ni-Mo composite alloy electrode had the highest HER electrocatalytic activity.

• Periodical: Materials Science Forum (Volume 921)
• Pages: 134-140
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.921.134
• Online since: May 2018
• Authors: Jing Guo Zhang, Shao Ming Zhang, Shuo Li*, He Dai, Qiang Hu, Bin Zhang, Li Min Wang
• Keywords: Composite Electrode, EIS, Hydrogen Evolution, Ni Foam, Plating

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