• Underpotential deposition of metals – Progress and prospects in modelling

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      https://www.ias.ac.in/article/fulltext/jcsc/117/03/0207-0218

    • Keywords

       

      Underpotential deposition; work function; surface coverage; phase transitions

    • Abstract

       

      Underpotential deposition (UPD) of metals is analysed from the perspective of phenomeno-logical and statistical thermodynamic considerations; the parameters influencing the UPD shift have been quantitatively indicated using a general formalism. The manner in which the macroscopic properties pertaining to the depositing ions and solvent dipoles and the nature of the metallic substrate influence the UPD process are highlighted; earlier correlations of the UPD shift with the work function differences are rationalised. Anion-induced phase transitions which manifest as sharp peaks in experimental cyclic voltammograms are discussed using statistical thermodynamic models.

    • Author Affiliations

       

      V Sudha1 M V Sangaranarayanan1

      1. Department of Chemistry, Indian Institute of Technology — Madras, Chennai - 600 036, India
    • Dates

       
  • Journal of Chemical Sciences | News

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