Electrochemical behavior and extraction of Nd (III) on reactive zinc electrode in LiCl-KCl melts

IF 3.2 2区工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Nuclear Materials Pub Date : 2025-05-01 Epub Date: 2025-03-18 DOI:10.1016/j.jnucmat.2025.155751

De-Bin Ji , Rui-Long Liang , Heng-Yu Tan , Shao-Ting Zhang , De-Qiang Ji , Hong-Jun Wu

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Abstract

The efficient extraction of neodymium is of great significance in the dry reprocessing process for the nuclear fuel cycle. In this research, the extraction of Nd in a LiCl-KCl molten salt system was achieved by potentiostatic electrolysis and galvanostatic electrolysis using Zn as the active cathode. A variety of electrochemical methods were employed to deeply investigate the electrochemical behavior of Nd on an inert Mo electrode, galvanized (Zn-coated) Mo electrode, and liquid Zn electrode in the LiCl-KCl melt. The six Zn-Nd intermetallic compounds formed on the Zn-coated Mo electrode were analyzed and determined in detail, and the thermodynamic properties of these six Zn-Nd intermetallic compounds were investigated. Furthermore, the activity coefficients and solubilities of Nd on the liquid Zn electrode were calculated at different temperatures. This study provides some fundamental data for spent fuel reprocessing technology and is expected to help advance the sustainable development of nuclear energy.

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活性锌电极在LiCl-KCl熔体中的电化学行为及Nd （III）的萃取

钕的高效提取在核燃料循环干式后处理过程中具有重要意义。本研究以锌为活性阴极，采用恒电位电解和恒流电解两种方法，在LiCl-KCl熔盐体系中萃取了Nd。采用多种电化学方法，深入研究了Nd在LiCl-KCl熔体中惰性Mo电极、镀锌（镀锌）Mo电极和液态Zn电极上的电化学行为。对镀锌Mo电极上形成的6种Zn-Nd金属间化合物进行了详细的分析和测定，并对这6种Zn-Nd金属间化合物的热力学性质进行了研究。计算了不同温度下锌液电极上Nd的活度系数和溶解度。本研究为乏燃料后处理技术提供了一些基础数据，有望促进核能的可持续发展。

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来源期刊

Journal of Nuclear Materials 工程技术-材料科学：综合

CiteScore

5.70

自引率

25.80%

发文量

601

审稿时长

63 days

期刊介绍： The Journal of Nuclear Materials publishes high quality papers in materials research for nuclear applications, primarily fission reactors, fusion reactors, and similar environments including radiation areas of charged particle accelerators. Both original research and critical review papers covering experimental, theoretical, and computational aspects of either fundamental or applied nature are welcome. The breadth of the field is such that a wide range of processes and properties in the field of materials science and engineering is of interest to the readership, spanning atom-scale processes, microstructures, thermodynamics, mechanical properties, physical properties, and corrosion, for example. Topics covered by JNM Fission reactor materials, including fuels, cladding, core structures, pressure vessels, coolant interactions with materials, moderator and control components, fission product behavior. Materials aspects of the entire fuel cycle. Materials aspects of the actinides and their compounds. Performance of nuclear waste materials; materials aspects of the immobilization of wastes. Fusion reactor materials, including first walls, blankets, insulators and magnets. Neutron and charged particle radiation effects in materials, including defects, transmutations, microstructures, phase changes and macroscopic properties. Interaction of plasmas, ion beams, electron beams and electromagnetic radiation with materials relevant to nuclear systems.