Electrochemical Characteristics of the Amorphous-Nanocrystal Ni–Mo Cathodes in Sodium Hydroxide Solution

Abstract:

The amorphous-nanocrystal Ni-Mo deposits were obtained by electrodeposition in alkaline nickel carbonate solution. X-ray diffraction (XRD), scanning electron microscopy (SEM) and modern technologies were used to describe the content, microstructure and morphology of the deposits. The electrochemical characteristics of Ni-Mo deposits were electrolyzed in 33°C, 7 mol/L NaOH electrolytic solutions. The results showed that when I was 100 mA·cm⁻², the hydrogen evolution potential of Ni-Mo_21.76 was lower than amorphous Ni-Mo_26.36 and 250mV lower than the nanocrystal Ni cathode. And the Ni-Mo deposits with more amorphous phase content would be in lower hydrogen evolution overpotential, a higher exchange current density, and a better electrolytic stability. These due to the amorphous combined with nanocrystal, lager contact surface and binding energy of Ni-Mo structure.

• Periodical: Key Engineering Materials (Volume 667)
• Pages: 280-285
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.667.280
• Online since: October 2015
• Authors: Ning Li*, Jian Meng Huang, Wei Zeng Chen, Bin Wang
• Keywords: Amorphous/Nanocrystal, Hydrogen Evolution, Microstructure, Ni-Mo Deposits

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