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The behavior of polypyrrole doped with different anions as an ion‐selective electrode
Author(s) -
Jovanović Vladislava M.,
Markičević Ljiljana,
Stanković Slavka,
Stanković Rade,
Jovanović Momir S.
Publication year - 1995
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140070613
Subject(s) - polypyrrole , cyclic voltammetry , dopant , inorganic chemistry , electrochemistry , electrode , polymerization , conductive polymer , chemistry , ion , materials science , doping , polymer , organic chemistry , optoelectronics
Abstract Polypyrrole (PPy) films were electrochemically deposited on glassy carbon from aqueous solutions of different sodium salts (F − , Cl − , NO 3 − , HSO 4 − ). Methods applied were potentiostatic polymerization or cyclic voltammetry. The electrochemical behavior of such electrodes was studied by cyclic voltammetry. The results obtained show that the reaction is localized at the electrode surface for polypyrrole doped with CI − and NO 3 − , anions and diffusion‐controlled for F − anions. The polypyrrole films, examined as ion‐selective electrodes in solutions of anions corresponding to the dopant ones, exhibit lower or higher deviation from the Nernstian response depending on the dopant. When polypyrrole doped with HSO 4 −was tested, a cationic response was obtained. The chemical exchange process of dopant anion was studied. The results show that this process depends on the nature of the dopant anion and the anion from the solution.