Two-dimensional phase transition in the electroreduction of heptyl viologen on polycrystalline silver in aqueous media

In aqueous media, the cation radical of heptyl viologen, HV +, forms a two-dimensional (2D) phase on a polycrystalline silver electrode. The phase results from the reduction of HV 2+ molecules adsorbed on the electrode and consists of the cation radical salt and bromide as counterion; it is dissolve...

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Bibliographic Details
Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2001-02, Vol.497 (1), p.168-171
Main Authors: Millán, J.I., Ruiz, J.J., Camacho, L., Rodríguez-Amaro, R.
Format: Article
Language:English
Subjects:
Adsorption
Chemistry
Chronoamperometry
Electrochemistry
Exact sciences and technology
General and physical chemistry
Kinetics and mechanism of reactions
Monolayer
Nucleation
Polycrystalline electrodes
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Summary:In aqueous media, the cation radical of heptyl viologen, HV +, forms a two-dimensional (2D) phase on a polycrystalline silver electrode. The phase results from the reduction of HV 2+ molecules adsorbed on the electrode and consists of the cation radical salt and bromide as counterion; it is dissolved through gradual nucleation and growth of vacancies, which take place simultaneously with a Langmuir-type desorption process.
ISSN:1572-6657
1873-2569
DOI:10.1016/S0022-0728(00)00451-4