Electrochemucalinvestigation of the Leucoemeraldineiemeraldine Redox Couple of Polyaniline
No Thumbnail Available
Date
1997-06
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa Universty
Abstract
Polyaniline (PANI) was prepared electrochemically by the pulse and potential
cycling methods at gold and platinum electrodes, respectively. Thin and thick films were
prepared by the latter method. Square-wave and ac-voltammetric methods were employed to
investigate the leucoemeraldine/emeraldine redox couple. Two well-separated cunent peaks
were obse!ved in the thick films suggesting a two-step reaction in the oxidation process. The
effect of supporting electrolytes on the ac-voltammetric behavior of PANI was also
investigated. The positions of the current peaks seem to be influenced by the size of the
anion. The obselved two-current peaks might be due to a two-step reaction in the
transformation of leucoemeraldine to emeraldine.
Description
Keywords
Polyaniline