Effect of thiourea on copper dissolution and deposition

被引：81

作者：

Alodan, M ^{[1
]}

Smyrl, W ^{[1
]}

机构：

[1] Univ Minnesota, Dept Chem Engn & Mat Sci, Corros Res Ctr, Minneapolis, MN 55455 USA

来源：

ELECTROCHIMICA ACTA | 1998年 / 44卷 / 2-3期

关键词：

thiourea; copper electrodeposition; quartz crystal microbalance; brightening; leveling;

D O I：

10.1016/S0013-4686(98)00060-7

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The effect of thiourea on copper was investigated in solutions of sulfuric acid. Weak interaction occurs at low concentrations of thiourea. At high concentrations of thiourea (>1 mM), strong effects were observed. Thiourea forms complexes with cuprous ions in solution which shift the open circuit potential of the copper electrode in a negative direction and causes copper to dissolve to cuprous species even in sulfate media. At more positive potentials, thiourea reacts with cupric ions and forms a complex. At a sufficient concentration of the cupric-thiourea complex, a sulfate complex film forms. The film can be formed reversibly upon cycling the copper electrode potential. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.

引用

页码：299 / 309

页数：11

共 15 条

[1]

ALODAN M, 1996, THESIS U MINNESOTA M

[2] SERS STUDY OF THE INTERACTION OF THIOUREA WITH A COPPER ELECTRODE IN SULFURIC-ACID-SOLUTION [J].

BROWN, GM ;

HOPE, GA ;

SCHWEINSBERG, DP ;

FREDERICKS, PM .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1995, 380 (1-2) :161-166

[3] VOLTAMMETRIC BEHAVIOR OF THE COPPER(II) THIOUREA SYSTEM IN SULFURIC-ACID MEDIUM AT PLATINUM AND GLASSY-CARBON ELECTRODES [J].

COFRE, P ;

BUSTOS, A .

JOURNAL OF APPLIED ELECTROCHEMISTRY, 1994, 24 (06) :564-568

[4] A RAMAN-SPECTROSCOPIC STUDY OF THIOUREA ADSORBED ON SILVER AND COPPER ELECTRODES [J].

FLEISCHMANN, M ;

HILL, IR ;

SUNDHOLM, G .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1983, 157 (02) :359-368

[5]

GERENROT Y, 1987, ELEKTROKHIMIYA, V14, P1083

[6] RADIOTRACER STUDY OF ADSORPTION PHENOMENA ON COPPER ELECTRODES - STUDY OF THE ADSORPTION OF CHLORIDE-IONS AND THIOUREA ON COPPERIZED ELECTRODES [J].

HORANYI, G ;

RIZMAYER, EM ;

JOO, P .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1983, 149 (1-2) :221-235

[7]

KORSHIN C, 1991, ELEKTROKHIMIYA, V27, P919

[8]

Levich V. G., 1962, PHYSICOCHEMICAL HYDR

[9] MOLECULAR-ORIENTATION OF THIOUREA CHEMISORBED ON COPPER AND SILVER SURFACES [J].

LOO, BH .

CHEMICAL PHYSICS LETTERS, 1982, 89 (04) :346-350

[10]

MISHRA U, 1987, J ELECTROCHEM SOC IN, V38, P147

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