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Inne
Electrochemical and Raman studies on the redox switching hysteresis of polyaniline.
Autorzy
Rok wydania
2003
Czasopismo
Numer woluminu
157
Strony
257-262
DOI
10.1016/S0167-2738(02)00218-7
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Cyclic voltammetry (CV), impedance spectroscopy, and Raman spectroscopy were used to characterize the redox switching hysteresis of polyaniline (PANI) in aqueous acid solutions. The polymer was prepared electrochemically. Polyaniline with various counterions: chloride, trichloroacetate, perchlorate, was studied. It was found that the hysteresis of the switching process depends on the electrolyte used for a switching performance. It increases in the order: trichloroacetic acid, perchloric acid, hydrochloric acid. The hysteresis is determined by the counterion used in the switching performance and it seems to be not dependent on a counterion history of the polymer. Effective charge diffusion coefficients follow changes in the basicity of the counterion. Raman spectra of the primary counterion–polyaniline differ for the chloride and perchlorate counterions. Raman spectroscopy reveals a stronger interaction with the secondary counterion in the polyaniline–perchlorate system than in the polyaniline–trichloroacetate system.
Słowa kluczowe
Polyaniline, Hysteresis, Diffusion coefficients, Raman spectroscopy
Adres publiczny
https://doi.org/10.1016/S0167-2738(02)00218-7
Strona internetowa wydawcy
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