A model of the anodic oxidation of metals in concentrated solutions: Second-order dynamics at the anodic film vertical bar solution interface

被引：34

作者：

Bojinov, M

机构：

[1] Ctrl. Lab. Electrochemical Pwr. S., Bulgarian Academy of Sciences

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1996年 / 405卷 / 1-2期

关键词：

anodic oxidation; kinetic model; Ac impedance; second-order dynamic behaviour; film/solution interface;

D O I：

10.1016/0022-0728(95)04392-6

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A model for the anodic oxidation of metals in concentrated solutions is presented. It emphasizes the competitive processes of film formation and dissolution occurring at different sites on the electrode surface and features selective adsorption of anions from the electrolyte. These processes result in a second-order dynamic behaviour of the metal\film\electrolyte system, producing a peculiar shape in the complex impedance plane. A kinetic scheme including two adsorbed intermediates and two dissolution paths was found to be able to reproduce semi-quantitatively the general features of the impedance spectra of copper, nickel, tin and antimony in concentrated H2SO4 solutions.

引用

页码：15 / 22

页数：8

共 21 条

[1] IMPEDANCE MEASUREMENTS OF A TIN ELECTRODE IN H2SO4 SOLUTIONS [J].