• An insight into the self-discharge of Fe3O4 electrodes in alkali solutions

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/103/02/0161-0171

    • Keywords

       

      Corrosion; cyclic voltammetry; iron oxide electrodes

    • Abstract

       

      Iron oxide development is necessary as the Iron electrodes exhibit high self discharge and poor charging efficiency in alkaline batteries. Pressed electrodes containing electrolytic iron powder with varying amounts of Fe3O4 have been used. The variation of open circuit potential and self discharge currents with alkali concentration is followed. For better understanding of these variations, cyclic polarisation (−1.3 V to + 0.4 Vvs Hg/HgO) and hydrogen evolution studies are carried out. Beyond −0.5 Vvs Hg/HgO, the surface is covered by hydrolysed layer and the protons diffuse away from this layer. The hydrogen evolution takes place with the discharge of K+ ions as the rate determining step.

    • Author Affiliations

       

      M Jayalakshmi1 V S Muralidharan1

      1. Central Electrochemical Research Institute, Karaikudi - 623 006, India
    • Dates

       
  • Journal of Chemical Sciences | News

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