Rotating Disk Electrode Study of Sm(III)/Sm(II) in LiCl-KCl Eutectic Molten Salt

IF 3.1 4区 工程技术 Q2 ELECTROCHEMISTRY Journal of The Electrochemical Society Pub Date : 2024-09-17 DOI:10.1149/1945-7111/ad77f5
Wonseok Yang, Suhee Choi, Tae-Hong Park, Sungyeol Choi and Sang-Eun Bae
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Abstract

Understanding the redox reactions of fission products in molten salts is crucial for developing pyroprocessing techniques for used nuclear fuel. A rotating disk electrode is useful for investigating the electrochemical reactions with controlled mass transfer conditions, but its application has been limited in high-temperature corrosive molten salts. This study employs a tungsten (W) rotating disk electrode (RDE) to measure the electrochemical and kinetic properties of the Sm(III)/Sm(II) redox reaction in a LiCl-KCl eutectic molten salt. The properties of the Sm(III)/Sm(II) redox reaction, including diffusion coefficients, exchange current densities, charge transfer coefficients, activation energies, and Tafel slopes, were determined over a temperature range of 723–803 K using limiting currents in linear sweep voltammetry at various rotating speeds and mass transfer-corrected Tafel plots. The kinetic parameters obtained using the rotating disk electrode system can be useful for optimizing the design of pyroprocessing techniques.
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锂盐-氯化钾共晶熔盐中 Sm(III)/Sm(II) 的转盘电极研究
了解熔盐中裂变产物的氧化还原反应对于开发废旧核燃料热处理技术至关重要。旋转盘电极可用于研究受控传质条件下的电化学反应,但其在高温腐蚀性熔盐中的应用一直受到限制。本研究采用钨(W)旋转盘电极(RDE)测量锂-氯化钾共晶熔盐中 Sm(III)/Sm(II) 氧化还原反应的电化学和动力学特性。在 723-803 K 的温度范围内,利用线性扫描伏安法在不同转速下的极限电流和传质校正塔菲尔图,测定了 Sm(III)/Sm(II) 氧化还原反应的特性,包括扩散系数、交换电流密度、电荷转移系数、活化能和塔菲尔斜率。使用旋转盘电极系统获得的动力学参数有助于优化热处理技术的设计。
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来源期刊
CiteScore
7.20
自引率
12.80%
发文量
1369
审稿时长
1.5 months
期刊介绍: The Journal of The Electrochemical Society (JES) is the leader in the field of solid-state and electrochemical science and technology. This peer-reviewed journal publishes an average of 450 pages of 70 articles each month. Articles are posted online, with a monthly paper edition following electronic publication. The ECS membership benefits package includes access to the electronic edition of this journal.
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