Electrochemical study of the properties of indium in the fused LiCl-KCl eutectic

Solutions of In ions in molten LiCl--KCl eutectic at 450 deg C have been studied using voltammetry and chronopotentiometry. The indium oxidation states +1 and +3 have been shown to exist in InCl solutions and in InCl sub 3 + In mixtures. Convolutional voltammetry and chronopotentiometry at a tungste...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 1992, Vol.139 (1), p.1-5
Main Authors: BOUTEILLON, J, JAFARIAN, M, POIGNET, J. C, REYDET, A
Format: Article
Language:English
Subjects:
Chemistry
Electrochemistry
Exact sciences and technology
General and physical chemistry
High temperature electrochemistry (including molten salts)
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Summary:Solutions of In ions in molten LiCl--KCl eutectic at 450 deg C have been studied using voltammetry and chronopotentiometry. The indium oxidation states +1 and +3 have been shown to exist in InCl solutions and in InCl sub 3 + In mixtures. Convolutional voltammetry and chronopotentiometry at a tungsten electrode in InCl sub 3 solutions were used as evedence that In(III) ion reduction occurred via two reversible steps. The first step, In(III)/In(I), involved two soluble species, with E exp 'o sub x In(III)/In(I) = --0.24 V vs. AgCl/Ag. The second step, In(I) /In(0), involved In metal of constant activity, with E exp 'o sub x In(I)/In(0) = --0.32 V/AgCl/Ag. The AgCl/Ag reference electrolyte contained 0.75 mole AgCl per kg of LiCl-CCl eutectic mixture. Graphs.
ISSN:0013-4651
1945-7111
DOI:10.1149/1.2069170