Electrochemical behavior and separation of iodide in molten LiF-NaF-KF melt
Abstract
This work studied the electrochemical behavior of iodide in molten LiF-NaF-KF mixture and the separation of iodide from the molten salt at 973 K using a graphite working electrode. The cyclic voltammetry (CV) and chronoamperometry (CA) measurements indicated an anodic passivation layer was formed on the graphite electrode in this melt and the layer blocked the charge transfer across the electrolyte/electrode interface. However, the added I- ions could pass through the passivation layer and were oxidized at the graphite electrode. The characterization of the obtained products proved that iodide ions was efficiently oxidized to I2 gas during electrolysis. Furthermore, the graphite anode showed excellent stability without any obvious change in dimensions after electrolysis, which showed the high current efficiency of I2 evolution reaction. Thus, the graphite electrode was possible to be served as an excellent anode to separate other anions (such as Br) from molten fluoride salts.
- Authors:
-
- Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States). Dept. of Mechanical Engineering. Nuclear Engineering Program
- Publication Date:
- Research Org.:
- Georgia Institute of Technology, Atlanta, GA (United States)
- Sponsoring Org.:
- USDOE Office of Nuclear Energy (NE)
- OSTI Identifier:
- 1850465
- Alternate Identifier(s):
- OSTI ID: 1657297
- Grant/Contract Number:
- NE0008306
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Nuclear Materials
- Additional Journal Information:
- Journal Volume: 542; Journal Issue: C; Journal ID: ISSN 0022-3115
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Materials Science; Nuclear Science & Technology; Iodide separation; Electrochemical Separation; Molten FLiNaK; Molten salt reactor
Citation Formats
Ge, Jianbang, Wang, Yafei, Chesser, Ryan, and Zhang, Jinsuo. Electrochemical behavior and separation of iodide in molten LiF-NaF-KF melt. United States: N. p., 2020.
Web. doi:10.1016/j.jnucmat.2020.152468.
Ge, Jianbang, Wang, Yafei, Chesser, Ryan, & Zhang, Jinsuo. Electrochemical behavior and separation of iodide in molten LiF-NaF-KF melt. United States. https://doi.org/10.1016/j.jnucmat.2020.152468
Ge, Jianbang, Wang, Yafei, Chesser, Ryan, and Zhang, Jinsuo. Thu .
"Electrochemical behavior and separation of iodide in molten LiF-NaF-KF melt". United States. https://doi.org/10.1016/j.jnucmat.2020.152468. https://www.osti.gov/servlets/purl/1850465.
@article{osti_1850465,
title = {Electrochemical behavior and separation of iodide in molten LiF-NaF-KF melt},
author = {Ge, Jianbang and Wang, Yafei and Chesser, Ryan and Zhang, Jinsuo},
abstractNote = {This work studied the electrochemical behavior of iodide in molten LiF-NaF-KF mixture and the separation of iodide from the molten salt at 973 K using a graphite working electrode. The cyclic voltammetry (CV) and chronoamperometry (CA) measurements indicated an anodic passivation layer was formed on the graphite electrode in this melt and the layer blocked the charge transfer across the electrolyte/electrode interface. However, the added I- ions could pass through the passivation layer and were oxidized at the graphite electrode. The characterization of the obtained products proved that iodide ions was efficiently oxidized to I2 gas during electrolysis. Furthermore, the graphite anode showed excellent stability without any obvious change in dimensions after electrolysis, which showed the high current efficiency of I2 evolution reaction. Thus, the graphite electrode was possible to be served as an excellent anode to separate other anions (such as Br) from molten fluoride salts.},
doi = {10.1016/j.jnucmat.2020.152468},
journal = {Journal of Nuclear Materials},
number = C,
volume = 542,
place = {United States},
year = {Thu Aug 27 00:00:00 EDT 2020},
month = {Thu Aug 27 00:00:00 EDT 2020}
}
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