Electrodeposition of Mackinawite films on Ti:: effects of the S2O32-/Fe2+ mole ratio in the solution

被引：5

作者：

Gomes, A ^{[1
]}

Pereira, MIS ^{[1
]}

Mendonça, MH ^{[1
]}

Costa, FM ^{[1
]}

机构：

[1] Univ Lisbon, Fac Ciencias, CCMM, Dept Quim & Bioquim, P-1749016 Lisbon, Portugal

来源：

ELECTROCHIMICA ACTA | 2004年 / 49卷 / 13期

关键词：

pulsed electrolysis; Mackinawite; iron sulphide oxidation; anodic stripping;

D O I：

10.1016/j.electacta.2003.12.042

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Mackinawite films have been deposited on Ti supports from aqueous solutions containing ferrous and thiosulphate ions, using a potentiostatic double pulse technique. Studies on the influence of the electrolyte concentration ratio [S2O32-]/[Fe2+] on the film properties were performed. Cyclic voltammetry was used as a diagnostic technique for the electrodeposition process. In situ characterisation of the deposits was performed by anodic stripping analysis. The structure and morphology of the films were investigated by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS). The experimental data provide evidence that Mackinawite deposits have been obtained from the entire electrodeposition baths although its purity is conditioned by the bath composition. Namely, when [S2O32- ] = [Fe2+], oxidation products such as alpha-S and gamma-FeOOH were detected. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：2155 / 2165

页数：11

共 38 条

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