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

Masayuki Itagaki, Akihiro Taya, Kunihiro Watanabe, Kazuhiko Noda

研究成果: Article査読

35 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)641-644
ページ数4
ジャーナルAnalytical Sciences
18
6
DOI
出版ステータスPublished - 2002 1 1
外部発表はい

ASJC Scopus subject areas

  • Analytical Chemistry

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