The measurement of the diffusion coefficients of ferrocene and ferrocenium and their temperature dependence in acetonitrile using double potential step microdisk electrode chronoamperometry

  • Wang Y
  • Rogers E
  • Compton R
  • 93


    Mendeley users who have this article in their library.
  • 64


    Citations of this article.


The diffusion coefficients of both ferrocene (Fc) and ferrocenium (Fc+) in acetonitrile containing 0.1 M tetra-n-butylammoniumperchlorate (TBAP) or 0.1 M tetra-n-butylammoniumhexafluorophosphate (TBAPF6) are reported, determined using the technique of double potential step chronoamperometry at a microdisk electrode. Activation energies of diffusion, Ea,Dare calculated for both redox species in each system. Diffusion coefficient ratios of the diffusion coefficients of Fc compared to that of Fc+in each case were found to be very close to 1. Activation energies of diffusion, Ea,D, for ferrocene and ferrocenium in the acetonitrile/perchlorate system were determined as 6.5 (±0.2) and 7.2 (±0.5) kJ mol-1, respectively. Similar values were determined for the acetonitrile/hexafluorophosphate system: 7.1 (±0.1) kJ mol-1for Fc and 7.4 (±0.3) kJ mol-1for Fc+. Cyclic voltammograms were recorded for ferrocene oxidation in both acetonitrile/electrolyte systems and it was observed that the E1/2values were similar and independent of the electrolyte used. © 2010 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Acetonitrile
  • Diffusional activation energy
  • Double potential step chronoamperometry
  • Ferrocene/ferrocenium
  • Ion-pairing
  • Supporting electrolyte

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free