Faradaic impedance at nonequilibrium electrode polarization

A. V. Gorodyskii, A. I. Karasevskii, D. V. Matyushov

Research output: Contribution to journalArticle

Abstract

The electrochemical impedance of cathodic deposition processes in an excess of inert electrolyte in calculated as a function of the electrode overpotential η and the signal frequency ω. The form of the functional dependence of the active R and capacity C components of the impedance on η and ω has been shown to be dependent on the rate constant, signal frequency, electrode potential and the position of the reaction plane Re with respect to the outer Helmholtz plane R0. The faradaic conductivity deviates essentially from the Tafel conductivity near the zero charge point and has a sharp minimum at this point. The function C(η) depends on the reaction plane position: it changes monotonically for Re < R0 and passes through a minimum at the zero charge point for Re ≥ R0.

Original languageEnglish (US)
Pages (from-to)1671-1678
Number of pages8
JournalElectrochimica Acta
Volume38
Issue number12
DOIs
StatePublished - Aug 1993
Externally publishedYes

Keywords

  • capacity
  • deposition
  • double layer
  • impedance
  • resistance

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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