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Characterization of the porous Ni3Al–Mo electrodes during hydrogen generation from alkaline water electrolysis

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  • Wu, Liang
  • He, Yuehui
  • Lei, Ting
  • Nan, Bo
  • Xu, Nanping
  • Zou, Jin
  • Huang, Baiyun
  • Liu, C.T.

Abstract

Objective of this work is to investigate the electrocatalytic efficiency using cyclic voltammetry, cathodic polarization and impedance spectroscopy techniques of the porous Ni3Al–Mo electrodes obtained by reactive synthesis of Ni, Al and Mo elemental powders. The kinetic parameters are determined from electrochemical steady-state polarization and electrochemical impedance spectroscopy technology in 6 M KOH. The Tafel slopes are around 0.13 V dec−1, and exchange current densities are close to 0.02 mA cm−2. Moreover, the porous Ni3Al–Mo electrodes possess high stability during prolonged electrolysis. Results are presented to show Tafel slopes, exchange current densities, apparent energy of activation and stability of the catalysts. Results suggest the significant catalytic performance not only from the increase of the real surface area of electrodes, but also from the true catalytic effect.

Suggested Citation

  • Wu, Liang & He, Yuehui & Lei, Ting & Nan, Bo & Xu, Nanping & Zou, Jin & Huang, Baiyun & Liu, C.T., 2013. "Characterization of the porous Ni3Al–Mo electrodes during hydrogen generation from alkaline water electrolysis," Energy, Elsevier, vol. 63(C), pages 216-224.
    • Handle: RePEc:eee:energy:v:63:y:2013:i:c:p:216-224
    DOI: 10.1016/j.energy.2013.10.029
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    4. Gong, Xuzhong & Wang, Mingyong & Liu, Yang & Wang, Zhi & Guo, Zhancheng, 2014. "Variation with time of cell voltage for coal slurry electrolysis in sulfuric acid," Energy, Elsevier, vol. 65(C), pages 233-239.

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