✦ LIBER ✦

Determination of the charge-transfer kinetics of ferrocene at platinum and vitreous carbon electrodes by potential steps chronocoulometry

✍ Scribed by Michael Sharp

Publisher: Elsevier Science
Year: 1983
Tongue: English
Weight: 715 KB
Volume: 28
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(83)85126-3

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✦ Synopsis

Potential step chrunocoulometric methods were used to measure kinetic parameters for the oxidation of ferrocene at platinum and vitreous carbon electrodes in acetonitrile. The formal rate constants observed, k;-0.02 cm s-I, were independent of electrode material and of the supporting electrolyte chosen (LiCIO,, TEAP or TEABF&). After correcting for the effecrs of double layer structure. the experimental activation energy for electron transfer was found to be AG * (exp) = 0.30 + 0.01 eV molecule-' which agreed within 207" with a theoretical value AG l (theor) = 0.26 eV molecule-' calculated for actlvatron by solvent repolarization alone from the Born equation.

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