Metallic and non-metallic redox response of conducting polymers

K Maksymiuk, AS Nyback, Johan Bobacka, Ari Ivaska, Andrzej Lewenstam

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35 Citations (Scopus)


The potentiometric response of electrodes coated with polypyrrole or poly(N-methylpyrrole) films with different doping anions was studied in solutions containing the redox couples: Fe(CN)(6)(3-/4-), Ru(NH3)(6)(3+/2+) and Fe(III)/Fe(II). The stable potential measures with the electrodes was the potential of the redox couple. The response time was instant for polypyrrole doped with dodecylsulphate ions, PPy(DS) and slow for the polymers doped with mobile anions. On the basis of electrochemical measurements and chemical analysis by EDAX spectroscopy it was found that with the PPy(DS) electrode the potentiometric response was of the 'metallic' type, with no change in the oxidation state of the bulk polymer. With the other polymer systems studied reduction or oxidation of the polymer bulk took place when it was in contact with a redox couple in the solution. (C) 1997 Elsevier Science S.A.
Original languageUndefined/Unknown
Pages (from-to)243–252
Number of pages10
JournalJournal of Electroanalytical Chemistry and Interfacial Electrochemistry
Issue number1-2
Publication statusPublished - 1997
MoE publication typeA1 Journal article-refereed

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