Skip to main content
SpringerLink
Log in

Effect of ohmic losses on potentiostatic transient response of a reversible redox system

  • Papers
  • Published:
Journal of Applied Electrochemistry Aims and scope Submit manuscript

Abstract

The ohmic potential drop between the working and reference electrodes plays an important role in the early stage of the voltage-step transient process. The non-linear effect of the ohmic drop on the transient currents is calculated for large voltage steps, assuming reversible behaviour (negligible surface overpotential) of the redox couple O+ne=R.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

Abbreviations

A :

area of working electrode (m2)

a c :

Cottrell coefficient (As1/2m−2), Equation 10a

B :

parameter of Cottrell asymptote, Equation 10c

c k :

concentration field ofk th component (mol m−3)

D k :

diffusion coefficient ofk th component (m2s−1)

d −1/2 x :

semiintegral, −1/2 x

f :

parameter of Cottrell asymptote, Equation 10b

I :

current (A)

I 0 :

initial current (≡−U/R w)(A)

i :

current density (≡I/A) (A m−2)

j k :

diffusion flux density ofkth component (mol m−2s−1)

r w :

radius of a disc electrode (m)

P :

normalized overpotential (≡FU/RT)

R w :

ohmic resistance adjoined to working electrode (Ω)

t :

time from the start (s)

t 0 :

initial lag time (≡(A R wαc/U)2) (s)

U :

constant voltage step from equilibrium (V)

ηc :

concentration overpotential (V)

K :

electroconductivity of bulk solution (τ−1 m−1)

k :

kth component

O:

cathodic depolarizer

R:

anodic depolarizer

w:

surface of working electrode

b:

bulk of solution

References

  1. D. D. McDonald, ‘Transient Techniques in Electrochemistry’, Plenum Press, New York (1981).

    Google Scholar 

  2. W. Vielstich and P. Delahay,J. Am. Chem. Soc. 79 (1957) 1874.

    Google Scholar 

  3. O. Wein, P. Mitschka and V. V. Tovchigrechko,Chem. Eng. Commun. 32 (1985) 153.

    Google Scholar 

  4. K. B. Oldham and J. Spannier, ‘The Fractional Calculus’, Academic Press, New York (1974).

    Google Scholar 

  5. O. Wein and F. H. Assaf,Collect. Czech. Chem. Commun. 52 (1986) 848.

    Google Scholar 

  6. J. S. Newman, ‘Electrochemical Systems’, Prentice Hall, Englewood Cliffs, NJ (1973).

    Google Scholar 

  7. N. A. Pokryvaylo, O. Wein and N. D. Kovalevskava, ‘Electrodiffusion Diagnostics of Flow’ (in Russian), Nauka i Tekhnika, Minsk (1988).

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Institute of Chemical Process Fundamentals, Czechoslovak Academy of Sciences, 165 02, Prague 6-Suchdol, Czechoslovakia

    O. Wein

Authors
  1. O. Wein
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Wein, O. Effect of ohmic losses on potentiostatic transient response of a reversible redox system. J Appl Electrochem 21, 1091–1094 (1991). https://doi.org/10.1007/BF01041453

Download citation

  • Received:

  • Revised:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01041453

Keywords

Search

Navigation