Ac voltammetric and impedance studies of the electrochemical oxidation of pyrrole in aqueous medium

Kwok Keung SHIU*, Yingzhou Zhang, Kwok Yin Wong

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

6 Citations (Scopus)

Abstract

The electropolymerization of pyrrole on platinum electrodes has been studied by ac voltammetric and impedance techniques. Anionic species such as chloride, bathophenanthroline disulfonate and ferricyanide, when present in solution during polymerization, adsorbed on the electrode surfaces and increased the rate of the electropolymerization process. The impedance responses of pyrrole solutions were also affected by the applied potential. These anionic species also became incorporated in the polypyrrole film as a result of chemical adsorption and electrostatic interaction.

Original languageEnglish
Pages (from-to)105-114
Number of pages10
JournalJournal of Electroanalytical Chemistry
Volume389
Issue number1-2
DOIs
Publication statusPublished - 1 Jun 1995

Scopus Subject Areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

User-Defined Keywords

  • Ac voltammetry
  • Electropolymerization
  • Impedance
  • Pyrrole

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