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Voltammetry of Aniline with Different Electrodes and Electrolytes

Doina Bejan ; Technical University "Gh.Asachi" IASSY, Faculty of Industrial Chemistry, Bdul Dimitrie Mangeron Nr. 71, Iasi 6600, Romania
Alexandru Duca ; Technical University "Gh.Asachi" IASSY, Faculty of Industrial Chemistry, Bdul Dimitrie Mangeron Nr. 71, Iasi 6600, Romania

Sažetak

The aim of the present paper is the electrochemical characterization of aniline as well as obtaining of thin polyaniline films on carbon electrodes, which can be used as analytical sensors. The study was carried out by voltammetry in aqueuos medium within the potential range of -0.3 ↔ +1.4 V/S.C.E., at a scanning rate of 50 mV s-1, by using different electrode surfaces (Pt.E., P.C.E., Sp.C.E. and G.C.E.) and support electrolytes (H₂SO₄, H₂SO₄ + NaClO₄, Na₂SO₄, Na₂SO₄ + NaClO₄). Particular attention was paid to the aniline electropolymerization in neutral medium, in a low concentration (5 ⋅ 10-4 M), which was compared with that in acid medium. Voltammetric characteristics of aniline (E_a, (E_c, (i_a, (i_c) were estimated, the reversibility of electrode processes (ΔE_(a-c), S_a/S_c ratio) was appreciated and the electropolymerization mechanism was correlated with the shapes of the voltammograms thus obtained. The electropolymerization efficiency was also estimated.

Ključne riječi

Hrčak ID:

132393

URI

https://hrcak.srce.hr/132393

Datum izdavanja:

1.10.1998.

Posjeta: 3.673 *