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

Kwok Keung Shiu, Yingzhou Zhang, Kwok Yin Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)


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
Issue number1-2
Publication statusPublished - 1 Jun 1995


  • Ac voltammetry
  • Electropolymerization
  • Impedance
  • Pyrrole

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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