Deviations of capacitive and inductive loops in the electrochemical impedance of a dissolving iron electrode

Masayuki Itagaki, Akihiro Taya, Kunihiro Watanabe, Kazuhiko Noda

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The electrochemical impedance of an iron electrode often shows the capacitive and inductive loops on the complex plane. The capacitive loop originates from the time constant of the charge transfer resistance and the electric double layer capacitance. The inductive loop is explained by Faradaic processes involving the reaction intermediate. In some cases, these loops deviate from a true semicircle. In this paper, the origins and curve-fitting methods for the deviated loops of electrochemical impedance are discussed. The constant phase element (CPE) was used to present the deviation of the capacitive loop instead of electric double layer capacitance. The reaction rate constants, which are a function of the frequency, are proposed for the Faradaic impedance to present the deviated inductive loop.

Original languageEnglish
Pages (from-to)641-644
Number of pages4
JournalAnalytical Sciences
Volume18
Issue number6
DOIs
Publication statusPublished - 2002 Jan 1

ASJC Scopus subject areas

  • Analytical Chemistry

Fingerprint Dive into the research topics of 'Deviations of capacitive and inductive loops in the electrochemical impedance of a dissolving iron electrode'. Together they form a unique fingerprint.

  • Cite this