Electrodeposition of Zn in acid sulphate solutions: pH effects

被引：29
|
作者：
Salles, Rycharda C. M. [2 ]
de Oliveira, Guilherme C. G. [2 ]
Diaz, Susana L. [1 ]
Barcia, Oswaldo E. [1 ,2 ]
Mattos, Oscar R. [1 ]
机构：
[1] Univ Fed Rio de Janeiro, LNDC Lab Ensaios Naodestrut Corrosao & Soldagem, EE PEMM COPPE, BR-21945970 Rio De Janeiro, Brazil
[2] IQ UFRJ, Dep Fis Quim, Rio De Janeiro, Brazil
来源：
ELECTROCHIMICA ACTA | 2011年 / 56卷 / 23期
关键词：
Zn electrodeposition; Adsorbed intermediates; Impedance; pH effects; ZINC DEPOSITION; ANODIC-DISSOLUTION; NICKEL IMPURITIES; REACTION MODEL; MECHANISM; ELECTROLYTES; ELECTROCRYSTALLIZATION; IMPEDANCES;
D O I：
10.1016/j.electacta.2010.12.026
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The kinetics of zinc electrodeposition from acid sulphate solution on a platinum electrode was investigated by means of stationary polarization curves, interfacial pH measurement and electrochemical impedance spectroscopy. The effect of pH, namely pH 2,3 and 4, was analyzed. A significant dependence of Zn electrodeposition with solution pH was verified. The results obtained cannot be predicted by the available models for Zn electrodeposition. A reaction model is then proposed based on the predominant steps as a function of the potential and the electrode surface nature. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：7931 / 7939
页数：9
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