An electrochemical study of samarium ions in the molten eutectic LiCl plus KCl

被引：99

作者：

Cordoba, G ^{[1
]}

Caravaca, C ^{[1
]}

机构：

[1] CIEMAT, Nucl Fis Dept, E-28040 Madrid, Spain

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2004年 / 572卷 / 01期

关键词：

cyclic voltammetry; molten chlorides; rare earths; samarium chloride;

D O I：

10.1016/j.jelechem.2004.05.029

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The electrochemical properties of samarium in LiCl + KCl eutectic melt were investigated at different temperatures. The stable oxidation states of samarium have been found to be (III) and (II) in the melt. The study of the Sm(II)/Sm(0) reaction was not feasible under these conditions. since its redox potential is in the same range of the solvent couple, Li(I)/Li(0). Transient electrochemical techniques, such as cyclic voltammetry, were used in order to determine the standard potential of the redox couple Sm(III)/Sm(II), the activity coefficient and the enthalpy and entropy of formation of SmCl3 in the eutectic melt. Mass transport towards the electrode is a simple diffusion process, and the diffusion coefficients have been calculated. The validity of the Arrhenius law was also verified. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：145 / 151

页数：7

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