粘土薄膜の電極修飾剤への応用

概要

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This article reviews the recent works on the application of clay thin films as an electrode modifier. This describes the fundamental mechanisms of a clay-modified electrode as well as the attempts to elucidate various kinds of functional electrodes. A clay-modified electrode is prepared by covering an electrode (e.g. glassy carbon, SnO_2 glass and platinum) with a thin film of clay (< 1μm in thickness). When a metal complex is included in the film, the electrode shows reversible redox currents in cyclic voltammetry due to the metal complex. The electrochemical studies also revealed that metal complex in a particular binding state like an ion-paired species diffusing in a clay film to an electrode surface wherein the complex exchanges an electron. Based on the methods, various kinds of functional electrodes have been constructed to achieve asymmetric electrochemical syntheses, ion-selective electrodes and photo-sensitive diodes. New attempts are described to construct a clay film controlled on a molecular scale and to study the mass transfer through the film with the quartz crystal balance methods.
日本粘土学会の論文
1994-03-25