• Underpotential deposition of metals – Progress and prospects in modelling

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    • 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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