The inductive behavior derived from hydrolysis of polyaniline

• Published in: Electrochimica acta 2002-10, Vol.47 (26), p.4195-4206
• Main Authors: Chen, Wei-Chih, Wen, Ten-Chin, Gopalan, A
• Format: Article
• Language: English
• Subjects: Chemistry; Electrochemical impedance spectroscopy (EIS); Electrochemistry; Electrodes: preparations and properties; Exact sciences and technology; General and physical chemistry; Inductive behavior; Other electrodes; Poly( N-methylaniline) (PNMA); Polyaniline (PANI); X-ray photoelectron spectroscopy (XPS)
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/S0013-4686(02)00438-3

Electrochemical impedance spectroscopy (EIS) was used to study the impedance characteristics of polyaniline (PANI) films deposited by cyclic voltammetry with different anodic potential limits. The presence of benzoquinone (BQ) as hydrolysis product of PANI was evident for PANI films deposited with anodic potential limits ≥0.80 V. The data from EIS for PANI film with inbuilt BQ reveals an inductive behavior. The existence of inductive behavior for PANI film under different applied bias potentials was brought out through fitting of EIS data with equivalent circuits and deducing the value of an inductor element (L). The inductive behavior was attributed to arise due to the presence of BQ within PANI films and adequately supported by the results from X-ray photoelectron spectroscopy (XPS). The value of L reaches saturation for the PANI film synthesized with an upper potential limit of 0.90 V and measured at 0.70 V. The EIS and XPS results of the poly( N-methylaniline) (PNMA) film prepared under similar conditions corroborated with the observation that the presence of BQ within PANI results inductive characteristics to PANI