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Mechanism of formation of polypyrrole on a Pt electrode from aqueous solutions

✍ Scribed by M.L. Marcos; I. Rodriguez; J. González-Velasco

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
628 KB
Volume
32
Category
Article
ISSN
0013-4686

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✦ Synopsis

A coherent explanation for the polypyrrole tridimensional growth on a Pt surface has been found. Two different potential ranges were studied on which the reaction mechanism changes. The results are not in disagreement with an instantaneous tridimensional nucleation [see, S. Asavapiriyanont, G. K. Chandler, G. A. Gunawardena and D. Pletcher, J. electronal. Chem. 177,229 (1984)] but do not show any pH dependence, from which a loss of H+ by the pyrrole monomers could be deduced.

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In situ raman studies of polypyrrole for
In situ raman studies of polypyrrole formation on a silver electrode
✍ J. Bukowska; K. Jackowska 📂 Article 📅 1990 🏛 Elsevier Science 🌐 English ⚖ 245 KB

Raman spectroscopic evidence is given for the formation of polypyrrole on some silver electrode surfaces. Oxidation of pyrrole and its subsequent polymerisation is merely promoted by the electrode surface illuminated by daylight during oxidation-reduction cycle. For the silver electrode roughened un