Influence of thiourea on silver deposition: Spectroscopic investigation

被引：51
|
作者：
Reents, B
Plieth, W
Macagno, VA
Lacconi, GI
机构：
[1] Univ Nacl Cordoba, Fac Ciencias Quim, Dept Fisicoquim, INFIQC, RA-5000 Cordoba, Argentina
[2] Tech Univ Dresden, Inst Phys Chem & Elektrochem, D-01069 Dresden, Germany
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1998年 / 453卷 / 1-2期
关键词：
silver electrodeposition; thiourea; surface enhanced Raman spectroscopy;
D O I：
10.1016/S0022-0728(98)00217-4
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The interfacial behaviour of thiourea (TU) in perchloric acid solutions on glassy carbon electrodes during silver electrodeposition has been studied using surface enhanced Raman spectroscopy (SERS). The spectroscopic results are compared with those obtained on electrochemically activated silver electrodes. Potential-dependent thiourea adsorption (occurring via sulphur) and ClO4- coadsorption an observed. No evidence for the adsorption of solution silver-thiourea complexes regardless of TU concentration was found. The time evolution of the TU SERS signals during the electroreduction of silver is a function of the crystallite formation (nucleation) and stabilization. (C) 1998 Elsevier Science S.A. All rights reserved.
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页码：121 / 127
页数：7
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