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Anionic Clay Modified Electrode for Detection of Alcohols. An Electrocatalytic Amperometric Sensor

โœ Scribed by Barbara Ballarin; Renato Seeber; Domenica Tonelli; Chiara Zanardi

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
166 KB
Volume
12
Category
Article
ISSN
1040-0397

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โœฆ Synopsis

The mechanism of the electrocatalytic oxidation towards a wide series of alcohols, by an electrode covered with the [Ni/AlยฑCl] hydrotalcyte-like clay, has been analyzed in the different steps it consists of. Such a clay has been reported to be electrically conductive via a mechanism that shows similarities with that of the redox polymers. The overall process occurs in quite a complicated physical system that is completely different both from a classical electrode-solution one and from an electrode covered with a ยฎlm of heterogeneous catalyst. By varying the characteristics of the substrate, in terms of steric hindrance and dipole moment of the molecule, the factors affecting the redox mediator-substrate reaction have been studied. The concentration ranges where the amperometric response varies linearly have been determined for the different substrates considered.

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