MECHANISM OF IONIC AND REDOX SENSITIVITY OF P-TYPE CONDUCTING POLYMERS .2. EXPERIMENTAL-STUDY OF POLYPYRROLE

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Publikationens författare: BOBACKA J, GAO ZQ, IVASKA A, LEWENSTAM A
Förläggare: ELSEVIER SCIENCE SA LAUSANNE
Publiceringsår: 1994
Tidskrift: Journal of Electroanalytical Chemistry
Tidskriftsakronym: J ELECTROANAL CHEM
Volym: 368
Nummer: 1-2
Artikelns första sida, sidnummer: 33
Artikelns sista sida, sidnummer: 41
Antal sidor: 9
ISSN: 0022-0728


Abstrakt

The potentiometric response of polypyrrole films is studied. The films are electrochemically deposited on platinum. The effects of film thickness, counter-anions and film conditioning on the response are studied. It is demonstrated that the response can vary from anionic to cationic, depending on the charge-compensating counter-anion (doping anion) incorporated during electropolymerization. Furthermore, the ionic response may be altered by redox couples in the solution, and under some conditions polypyrrole may also act as a pure redox electrode. The mixed ionic and redox sensitivities of polypyrrole are explained by considering both ion and electron transfer at the polymersolution interface. The experimental results are related to a theoretical model developed for p-type conducting polymers

Senast uppdaterad 2019-11-12 vid 04:09