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

28 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
Externally publishedYes

Fingerprint

Capacitance
Iron
Reaction intermediates
Electrodes
Curve fitting
Reaction rates
Charge transfer
Rate constants

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Deviations of capacitive and inductive loops in the electrochemical impedance of a dissolving iron electrode. / Itagaki, Masayuki; Taya, Akihiro; Watanabe, Kunihiro; Noda, Kazuhiko.

In: Analytical Sciences, Vol. 18, No. 6, 2002, p. 641-644.

Research output: Contribution to journalArticle

Itagaki, Masayuki ; Taya, Akihiro ; Watanabe, Kunihiro ; Noda, Kazuhiko. / Deviations of capacitive and inductive loops in the electrochemical impedance of a dissolving iron electrode. In: Analytical Sciences. 2002 ; Vol. 18, No. 6. pp. 641-644.
@article{dff02cb9ae464144b692de553f616e00,
title = "Deviations of capacitive and inductive loops in the electrochemical impedance of a dissolving iron electrode",
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.",
author = "Masayuki Itagaki and Akihiro Taya and Kunihiro Watanabe and Kazuhiko Noda",
year = "2002",
doi = "10.2116/analsci.18.641",
language = "English",
volume = "18",
pages = "641--644",
journal = "Analytical Sciences",
issn = "0910-6340",
publisher = "Japan Society for Analytical Chemistry",
number = "6",

}

TY - JOUR

T1 - Deviations of capacitive and inductive loops in the electrochemical impedance of a dissolving iron electrode

AU - Itagaki, Masayuki

AU - Taya, Akihiro

AU - Watanabe, Kunihiro

AU - Noda, Kazuhiko

PY - 2002

Y1 - 2002

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0036295450&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036295450&partnerID=8YFLogxK

U2 - 10.2116/analsci.18.641

DO - 10.2116/analsci.18.641

M3 - Article

C2 - 12083547

AN - SCOPUS:0036295450

VL - 18

SP - 641

EP - 644

JO - Analytical Sciences

JF - Analytical Sciences

SN - 0910-6340

IS - 6

ER -