Electrochemical behavior of zinc in aqueous Cr(VI) solution with pH 1.8

被引：0
|
作者：
Nakazato, RZ [1 ]
Benedetti, AV [1 ]
Sumodjo, PTA [1 ]
机构：
[1] Univ Sao Paulo, Inst Quim, BR-05599 Sao Paulo, Brazil
来源：
PROCEEDINGS OF THE SYMPOSIUM ON FUNDAMENTAL ASPECTS OF ELECTROCHEMICAL DEPOSITION AND DISSOLUTION INCLUDING MODELING | 1998年 / 97卷 / 27期
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暂无
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The electrochemical behavior of zinc in aqueous Cr(VI) at pH 1.8 was studied using cyclic voltammetry and chronoamperometry. The typical potentiodynamic profile shows an anodic current peak, which was associated with the formation of a thin film of, possibly, ZnO. The formation of the film follows the model for irreversible adsorption of a monolayer controlled by the charge transfer reaction. Reduction of the film occurs through a nucleation and growth model. Analysis of the current transients of the potentiostatic reduction of the film confirms the model. During the cathodic scan appears a limiting current which is attributed to the reduction of Cr(VI) to Cr(III) species.
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页码：183 / 193
页数：11
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