Following the electroreduction of uranium dioxide to uranium in LiCl-KCl eutectic in situ using synchrotron radiation
Following the electroreduction of uranium dioxide to uranium in LiCl-KCl eutectic in situ using synchrotron radiation
复制标题
DOI：
10.1016/j.jnucmat.2015.04.037
复制
发表时间：
2015-09-01
影响因子：
3.1
通讯作者：
Shearing, P. R.
中科院分区：
文献类型：
--
作者：
Brown, L. D.;Abdulaziz, R.;Shearing, P. R.
研究了在氯化锂-氯化钾共晶熔盐中二氧化铀的电化学还原。基于实验室的电化学研究已经与原位能量色散X射线衍射相结合，首次推导出还原途径。在电还原形成α-铀之前、期间或之后，使用X射线衍射没有鉴定出中间相。这表明电化学还原通过单个4电子步骤过程发生。在电解过程中，α-铀的形成速率降低，这可能是熔盐中氧阴离子积累的结果。O2-离子从UO 2工作电极的缓慢传输会阻碍电化学还原。(C)2015年，作者。由爱思唯尔公司出版
The electrochemical reduction of uranium dioxide to metallic uranium has been investigated in lithium chloride-potassium chloride eutectic molten salt. Laboratory based electrochemical studies have been coupled with in situ energy dispersive X-ray diffraction, for the first time, to deduce the reduction pathway. No intermediate phases were identified using the X-ray diffraction before, during or after electroreduction to form alpha-uranium. This suggests that the electrochemical reduction occurs via a single, 4-electron-step, process. The rate of formation of a-uranium is seen to decrease during electrolysis and could be a result of a build-up of oxygen anions in the molten salt. Slow transport of O2- ions away from the UO2 working electrode could impede the electrochemical reduction. (C) 2015 The Authors. Published by Elsevier B.V.