Potential program invariant representation of voltammetric measurement results of reversible redox couples

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The use of a transformation is proposed by which the results of voltammetric measurements based on diffusion of reversible redox couples to an electrode of any geometry can be presented in the form of a standardized function T. To characterize the time dependence of the diffusion we define the function G(s) by writing the Cottrell response of the species i in the form Īi,cottrell(s) = ±Kici*G(s)/s where Ki is a constant, ci* the bulk concentration of the diffusing species, s the Laplace variable; then we show that: (a) any voltammetric curve (Ī(s)) measured in the same system can be transformed to potential program invariant form by computing the function T = L-1{Ī(s)/G(s)}; (b) the diffusional admittance of the same system is expressed by Y(S) = G(s)dT/dE; (c) one can perform the transformation yielding the potential program invariant form by passing the I(t) function through a numeric filter having 1/G(s) transfer characteristics.

Original languageEnglish
Pages (from-to)13-19
Number of pages7
JournalJournal of Electroanalytical Chemistry
Volume422
Issue number1-2
Publication statusPublished - Feb 15 1997

Fingerprint

Electrodes
Geometry
Oxidation-Reduction

Keywords

  • Diffusion-controlled electrode process
  • Numerical transformation
  • Potential program invariant representation
  • Voltammetric measurements

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

@article{3064ca4f9377426c9d9ebffa934d3b06,
title = "Potential program invariant representation of voltammetric measurement results of reversible redox couples",
abstract = "The use of a transformation is proposed by which the results of voltammetric measurements based on diffusion of reversible redox couples to an electrode of any geometry can be presented in the form of a standardized function T. To characterize the time dependence of the diffusion we define the function G(s) by writing the Cottrell response of the species i in the form Īi,cottrell(s) = ±Kici*G(s)/s where Ki is a constant, ci* the bulk concentration of the diffusing species, s the Laplace variable; then we show that: (a) any voltammetric curve (Ī(s)) measured in the same system can be transformed to potential program invariant form by computing the function T = L-1{Ī(s)/G(s)}; (b) the diffusional admittance of the same system is expressed by Y(S) = G(s)dT/dE; (c) one can perform the transformation yielding the potential program invariant form by passing the I(t) function through a numeric filter having 1/G(s) transfer characteristics.",
keywords = "Diffusion-controlled electrode process, Numerical transformation, Potential program invariant representation, Voltammetric measurements",
author = "T. Pajkossy",
year = "1997",
month = "2",
day = "15",
language = "English",
volume = "422",
pages = "13--19",
journal = "Journal of Electroanalytical Chemistry",
issn = "0022-0728",
publisher = "Elsevier Sequoia",
number = "1-2",

}

TY - JOUR

T1 - Potential program invariant representation of voltammetric measurement results of reversible redox couples

AU - Pajkossy, T.

PY - 1997/2/15

Y1 - 1997/2/15

N2 - The use of a transformation is proposed by which the results of voltammetric measurements based on diffusion of reversible redox couples to an electrode of any geometry can be presented in the form of a standardized function T. To characterize the time dependence of the diffusion we define the function G(s) by writing the Cottrell response of the species i in the form Īi,cottrell(s) = ±Kici*G(s)/s where Ki is a constant, ci* the bulk concentration of the diffusing species, s the Laplace variable; then we show that: (a) any voltammetric curve (Ī(s)) measured in the same system can be transformed to potential program invariant form by computing the function T = L-1{Ī(s)/G(s)}; (b) the diffusional admittance of the same system is expressed by Y(S) = G(s)dT/dE; (c) one can perform the transformation yielding the potential program invariant form by passing the I(t) function through a numeric filter having 1/G(s) transfer characteristics.

AB - The use of a transformation is proposed by which the results of voltammetric measurements based on diffusion of reversible redox couples to an electrode of any geometry can be presented in the form of a standardized function T. To characterize the time dependence of the diffusion we define the function G(s) by writing the Cottrell response of the species i in the form Īi,cottrell(s) = ±Kici*G(s)/s where Ki is a constant, ci* the bulk concentration of the diffusing species, s the Laplace variable; then we show that: (a) any voltammetric curve (Ī(s)) measured in the same system can be transformed to potential program invariant form by computing the function T = L-1{Ī(s)/G(s)}; (b) the diffusional admittance of the same system is expressed by Y(S) = G(s)dT/dE; (c) one can perform the transformation yielding the potential program invariant form by passing the I(t) function through a numeric filter having 1/G(s) transfer characteristics.

KW - Diffusion-controlled electrode process

KW - Numerical transformation

KW - Potential program invariant representation

KW - Voltammetric measurements

UR - http://www.scopus.com/inward/record.url?scp=0031073427&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031073427&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0031073427

VL - 422

SP - 13

EP - 19

JO - Journal of Electroanalytical Chemistry

JF - Journal of Electroanalytical Chemistry

SN - 0022-0728

IS - 1-2

ER -