The effect of the counter ion concentration on the electrochemistry of tetracyanoquinodimethane polymer film electrodes

G. Inzelt, J. Bacskai, J. Q. Chambers, R. W. Day

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The effect of the counter in concentration on the cyclic voltammetric behavior of TCNQ polymer film electrodes has been studied in different aqueous electrolytes. The variation of the peak currents and peak potentials as a function of the counter ion concentration is explained in terms of salt or ion pair formation between the reduced redox sites in the film and the counter ions, as well as the polyelectrolyte behavior of the surface layer. The voltammetric behavior is simulated by an empirical model that takes into account ionic shielding of fixed-site charges by electrolyte ions. With increasing concentration of the supporting electrolyte, the reduced polymer film adopts a more compact structure and the diffusion of the counter ions and/or the segmental motion of the polymer chain becomes hindered. No dissolution of the film occurs at negative potentials in simple salt electrolytes or in buffers up to pH 10 at high enough electrolyte concentration.

Original languageEnglish
Pages (from-to)301-314
Number of pages14
JournalJournal of Electroanalytical Chemistry
Volume201
Issue number2
DOIs
Publication statusPublished - Apr 25 1986

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Radiation counters
Electrochemistry
Polymer films
Electrolytes
Electrodes
Salts
Ions
Polyelectrolytes
Shielding
Buffers
Polymers
Dissolution
tetracyanoquinodimethane

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

The effect of the counter ion concentration on the electrochemistry of tetracyanoquinodimethane polymer film electrodes. / Inzelt, G.; Bacskai, J.; Chambers, J. Q.; Day, R. W.

In: Journal of Electroanalytical Chemistry, Vol. 201, No. 2, 25.04.1986, p. 301-314.

Research output: Contribution to journalArticle

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