Identification of inductive behavior for polyaniline via electrochemical impedance spectroscopy

Wei Chih Chen, Ten Chin Wen, Chi Chang Hu, A. Gopalan

Research output: Contribution to journalArticlepeer-review

93 Citations (Scopus)

Abstract

Polyaniline (PANI) film electrodeposited in HCl medium using cyclic voltammetry (CV) with an upper potential limit of 0.90 V, exhibited an inductive behavior. PANI films deposited with different conditions were subjected to various applied potentials and the impedance characteristics were recorded through electrochemical impedance spectroscopy (EIS). The impedance results clearly reveal the existence of inductive behavior to PANI. Inductive behavior was observed for PANI films deposited with conditions which favor benzoquinone/hydroquinone (BQ/HQ) formation and further evidenced by X-ray photoelectron spectroscopy (XPS). A comparative analysis of the EIS and XPS results of PANI films prepared under similar conditions with the upper potential limits of 0.75 and 0.90 V, respectively, clearly documented that the presence of BQ/HQ, the degradation product of PANI, formed during the electrochemical polymerization at the upper potential limits causes inductive behavior to PANI.

Original languageEnglish
Pages (from-to)1305-1315
Number of pages11
JournalElectrochimica Acta
Volume47
Issue number8
DOIs
Publication statusPublished - 2002 Feb 1

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

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