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An investigation on the adsorption characteristics and orientations model of pyrrole on smooth platinum electrode

✍ Scribed by I. Becerik; F. Kadirgan

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
602 KB
Volume
42
Category
Article
ISSN
0013-4686

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✦ Synopsis

Since the electropolymerization

mechanism is believed to involve the initial adsorption of the monomer on to the electrode surface, in this paper, different criteria for the electroadsorption of pyrrole on a smooth polycrytalline platinum electrode were investigated in different pH media. Experiments were performed in a neutral medium (0.1 M NazHP04 + 0.1 M KHzP04) and an HzSO~ aqueous medium as functions of pyrrole concentration, adsorption time and adsorption potential. The adsorption kinetics and isotherms were studied at constant potential. The number of electrons per occupied site (G) and surface coverage ratios (9) were calculated. Possible orientation models were proposed for adsorbed species.

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