Mechanism of Electropolymerization of Pyrrole in Acidic Aqueous Solutions

Mechanism of electrochemical polymerization of pyrrole (Py) on a Pt electrode in acidic aqueous solutions was studied by means of potentiostatic measurements, cyclic voltammetry and chronopotentiometry. Pyrrole molecule appeared to be initially oxidized via two-electron transfer step to produce oxid...

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Published inBulletin of the Korean Chemical Society Vol. 9; no. 4; pp. 248 - 251
Main Authors Kim, Kang-Jin, Song, Hyung-Soo, Kim, Jin-Doo, Chon, Jung-Kyoon
Format Journal Article
LanguageKorean
Published 1988
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Summary:Mechanism of electrochemical polymerization of pyrrole (Py) on a Pt electrode in acidic aqueous solutions was studied by means of potentiostatic measurements, cyclic voltammetry and chronopotentiometry. Pyrrole molecule appeared to be initially oxidized via two-electron transfer step to produce oxidized pyrrole ion ($Py^+$), which was coupled with a non-oxidized pyrrole to yield a dimerized species, Py-Py. The Py-Py thus formed was further oxidized again via two-electron transfer step, which was followed by coupling with non-oxidized monomer and by concomitant expulsion of a $H^+$. Then the latter chain extension process was repeated. The chain extension and polypyrrole oxidation reactions occurred competitively.
Bibliography:KISTI1.1003/JNL.JAKO198813464452603
ISSN:0253-2964
1229-5949