Journal article
Polymer films on electrodes
Journal of electroanalytical chemistry and interfacial electrochemistry, Vol.153(1), pp.223-242
1983
DOI: 10.1016/S0022-0728(83)80015-1
Abstract
Chronoamperometry was used to discriminate between two models describing mass transport of a solution species to an electrode surface through an electroinactive polymer layer. At potentials where poly(vinyl ferrocene) is not electroactive, a platinum disk modified with this polymer was used to examine the first reduction of methyl viologen dication (MV
2+) and of benzoquinone (BQ) in acetonitrile. The membrane model, as opposed to the pinhole model, was shown to be consistent with the chronoamperometric data; XPS and SEM results support this conclusion. Rotating disk electrode measurements were also consistent with the membrane model. A method to determine the thickness of the solvent-swollen polymer is discussed, and estimates of the redox couples' diffusion coefficients and extraction coefficients into the polymer based on this thickness were:
D
m(MV
2+)=4×10
−8 cm
2/s;
D
m(BQ)=1×10
−7 cm
2/s;
K(MV
2+)=6; and
K(BQ)=4.
Details
- Title: Subtitle
- Polymer films on electrodes
- Creators
- Johna LeddyAllen J Bard
- Resource Type
- Journal article
- Publication Details
- Journal of electroanalytical chemistry and interfacial electrochemistry, Vol.153(1), pp.223-242
- Publisher
- Elsevier B.V
- DOI
- 10.1016/S0022-0728(83)80015-1
- ISSN
- 0022-0728
- Language
- English
- Date published
- 1983
- Academic Unit
- Chemistry
- Record Identifier
- 9984216598902771
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