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Electrocatalytic oxidation of hydrazine in acid media on polyaniline-filmed vitreous carbon

โœ Scribed by Lioudmila Doubova; Monica Fabrizio; Giuliano Mengoli; Sergio Valcher

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
679 KB
Volume
35
Category
Article
ISSN
0013-4686

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โœฆ Synopsis

O.5 M hydrazine in aqueous H,SO, for pHs in the range 1.5-3.75 catalytically oxidizes on polyaniline-filmed vitreous carbon, whereas the process is totally inhibited on the bare electrode substrate.

The pH dependence of the reducing power of hydrazine accounts for the onset potential of the oxidation, while the currents are under pure kinetic control. A kinetic analysis of the "chemical" reduction of the emeraldine by hydrazine indicates that its rate characterizes the currents. Catalytic oxidation is faster in aprotic medium but the currents are transient owing to progressive deactivation of the polymer electrode.

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