INFLUENCE OF SOLUTION ACIDITY ON THE ADSORPTION AND CHARGE-TRANSFER KINETICS OF PARABANIC ACID REDUCTION

被引：7

作者：

CALVENTE, JJ ^{[1
]}

ANDREU, R ^{[1
]}

ROLDAN, E ^{[1
]}

DOMINGUEZ, M ^{[1
]}

机构：

[1] UNIV SEVILLA,DEPT QUIM FIS,E-41012 SEVILLE,SPAIN

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1995年 / 390卷 / 1-2期

关键词：

ACIDITY EFFECTS; ELECTROREDUCTION MECHANISM; AC IMPEDANCE MEASUREMENTS; ADSORPTION; CHARGE TRANSFER KINETICS; PARABANIC ACID;

D O I：

10.1016/0022-0728(95)03958-J

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Parabanic acid reduction has been studied in the -1.4 less than or equal to H-0 less than or equal to 0.9 acidity range by the ac impedance technique. Changes in the adsorption of reactant and products with solution acidity lead to protonation equilibrium constants that differ from their bulk values. The observed pK(a) shifts were consistent with interfacial dielectric saturation. Variation of the charge transfer parameters with potential and proton activity allows a detailed analysis of the reduction mechanism to be performed in terms of the scheme of squares.

引用

页码：115 / 126

页数：12

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