Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 168, Issue 2, Pages -Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1945-7111/abe56c
Keywords
thorium; speciation; electrochemical behavior; molten chloride; fluoride
Funding
- Strategic Priority Research Program
- Frontier Science Key Program
- Youth innovation Promotion Association of the Chinese Academy of Sciences [XDA02030000, QYZDY-SSW-JSC016, 2017307]
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The speciation and electrochemical behavior of thorium (IV) fluoride in molten LiCl-KCl with a copper working electrode was studied. In addition to the reduction of Th(IV) to metallic thorium, a minor peak in the cyclic and square wave voltammagrams was observed, indicating another reduction reaction occurring. This was supported by the formation of metallic thorium deposits during potentiostatic electrolysis.
The speciation and electrochemical behavior of thorium (IV) fluoride in molten LiCl-KCl with a copper working electrode was investigated. In addition to the reduction of Th(IV) [ThCl62- and ThCl73-] to metallic thorium, there is a minor peak in the cyclic and square wave voltammagrams that results from the reduction of Th(IV) [ThCl6-xFx2- and ThCl7-xFx3-] to metallic thorium on the basis of the square wave voltammetry and X-ray diffraction results. This is also supported by the formation of metallic thorium deposits upon potentiostatic electrolysis. In addition, the diffusion coefficient and diffusion activation energy of Th(IV) with a copper electrode was determined, which show similarity in comparison to those obtained using inert working electrodes.
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