Electrochemical Behavior of UO2F2 and Its Electrodeposition from UO2F2-FLiNaK Melt

被引：12

作者：

Han, Dong ^{[1
,2
,3
]}

She, ChangFeng ^{[1
,3
]}

Peng, Jia ^{[1
,3
]}

Jiang, Feng ^{[1
,3
]}

Yang, Xu ^{[1
,2
,3
]}

Peng, Hao ^{[1
,3
]}

Yang, Yang ^{[1
,3
]}

Zheng, Haiyang ^{[1
,3
]}

Wang, Xianbin ^{[1
,2
,3
]}

Xu, Qianhui ^{[1
,2
,3
]}

Wang, Chenyang ^{[1
,3
]}

Zhu, Tiejian ^{[1
,3
]}

Luo, Yan ^{[1
,3
]}

Huang, Wei ^{[1
,3
]}

Gong, Yu ^{[1
,3
]}

Li, Qingnuan ^{[1
,3
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, Ctr Excellence TMSR Energy Syst, Shanghai 201800, Peoples R China

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2018年 / 165卷 / 07期

基金：

中国国家自然科学基金;

关键词：

MOLTEN-SALT REACTOR; LIF-NAF-KF; URANIUM; SYSTEM; SEPARATION; FLUORIDES; LICL;

D O I：

10.1149/2.0971807jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrochemical behavior of UO2F2 in LiF-NaF-KF (46.5-11.5-42 mol%, FLiNaK) melt on Pt electrode was investigated at 550 degrees C by cyclic voltammetry (CV) and square wave voltammetry (SWV). UO2F2 was prepared by the reaction of UF4 powder and oxygen at 650 degrees C, and ascertained by X-ray diffraction (XRD) and Raman spectroscopy. It was found that the reduction of UO22+ in FLiNaK exhibited two steps both with one exchanged electron: UO22+ + e(-)-> UO2(+) and UO2+ e(-) -> UO2 , with the CV reduction peak at about 2.02 V and 1.49 V (vs. K+/K), respectively. Both of them were reversible and diffusion-controlled. By means of potentiostatic electrolysis, the product of UO2 was obtained and the separation ratio of uranium from UO2F2-FLiNaK melt was approximately 54.5% at 550 degrees C, which were characterized by XRD and the inductively coupled plasma atomic emission spectrometer (ICP-AES). (C) The Author(s) 2018. Published by ECS.

引用

页码：D301 / D306

页数：6

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