Electrochemical study of polythionite solutions in HMPA

被引：4

作者：

Potteau, E ^{[1
]}

Levillain, E ^{[1
]}

Lelieur, JP ^{[1
]}

机构：

[1] LASIR, Spectrochim Infrarouge & Raman Lab, UPR 2631 CNRS, F-59046 Lille, France

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1997年 / 436卷 / 1-2期

关键词：

sulfur dioxide; polythionites; dithionite; HMPA; reduction mechanism; cyclic voltammetry;

D O I：

10.1016/S0022-0728(97)00319-7

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Polythionite solutions Li(SO2)(n), prepared by chemical reduction of sulfur dioxide by lithium, have been investigated by classical electrochemical techniques (cyclic voltammetry, electrochemical impedance spectroscopy). The study of Li(SO2)-hexamethylphosphoramide (HMPA) solutions shows that the dithionite ion S2O42- is not electroactive, and confirms that the concentration of SO2-. is very low in these solutions. The study of Li(SO2)(n)-HMPA solutions with n > 1 allows to identify two redox couples: SO2/SO2-., and S2O4/S2O4-., and some of the homogeneous chemical reactions coupled to these electron transfers. (C) 1997 Elsevier Science S.A.

引用

页码：271 / 275

页数：5

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