Anodic Oxidation of Silver Alloys in Concentrated Sulfuric Acid Solutions

被引：0
|
作者：
E. P. Grishina
A. M. Udalova
E. M. Rumyantsev
机构：
[1] Russian Academy of Sciences,Institute of Chemistry of Solutions
[2] Ivanovo State University of Chemical Technology,undefined
来源：
Russian Journal of Electrochemistry | 2003年 / 39卷
关键词：
silver alloys; anodic oxidation; passivation; sulfuric acid;
D O I：
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学科分类号：
摘要：
Anodic oxidation of Ag–Cu and Ag–Pd alloys in concentrated sulfuric acid solutions is studied by cyclic voltammetry. Influence of electronegative (Cu) and electropositive (Pd) constituents on the rate and mechanism of the silver electrooxidation in non-steady-state conditions is revealed. The maximum silver oxidation current increases with the copper content due to a decreased H2SO4 concentration in the near-electrode layer and increased solubility of passivating phase Ag2SO4. The mechanism of ionization of palladium-doped silver is complicated by two electrochemical reactions involving the formation of Ag2SO4 and Ag+solv.
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页码：903 / 906
页数：3
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