The electric double layer at high surface potentials: the influence of excess ion polarizability

Marius M. Hatlo, Rene van Roij, Leo Lue

Research output: Contribution to journalArticle

81 Citations (Scopus)
49 Downloads (Pure)

Abstract

By including the excess ion polarizability into the Poisson-Boltzmann theory, we show that the decrease in differential capacitance with voltage, observed for metal electrodes above a threshold potential, can be understood in terms of thickening of the double layer due to ion-induced polarizability holes in water. We identify a new length which controls the role of excess ion polarizability in the double layer, and show that when this is comparable to the size of the effective Debye layer, ion polarizability can significantly influence the properties of the double layer. 

Original languageEnglish
Article number28010
Number of pages6
JournalEPL: A Letters Journal Exploring the Frontiers of Physics
Volume97
Issue number2
DOIs
Publication statusPublished - 18 Jan 2012

Keywords

  • single crystal electrodes
  • electrolytes
  • adsorption
  • silver
  • water
  • interfaces
  • anions
  • energy
  • ion polarizability

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