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<p><b>Abstract</b>—The electrochemical behavior of uranium ions in a molten LiF–BeF<sub>2</sub> mixture at 923 K is studied using stationary galvanostatic polarization curves, square-wave voltammetry, and chronopotentiometry. The melts containing 0.095–1.063 wt % UF<sub>3</sub> are investigated. The cathodic reduction of U(III) is shown to occur in a single stage: U(III) + <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11505_2025_11895_Article_IEq1.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="41" /> </InlineMediaObject> <EquationSource Format="TEX">\(3\bar {e} \to \)</EquationSource> <!--RusMet2570116Arkhipov-m1--> </InlineEquation> U(0). According to well-known diagnostic criteria, this reaction in the uranium trifluoride concentration range under study is reversible and controlled by the processes of electroactive ion transport to an electrode. The diffusion coefficients of the complexes formed by trivalent uranium ions are calculated.</p>

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Electrochemical Behavior of Uranium Ions in Lithium and Beryllium Fluoride Melts

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • S. P. Arkhipov,
  • Yu. P. Zaikov,
  • P. A. Arkhipov

摘要

Abstract—The electrochemical behavior of uranium ions in a molten LiF–BeF2 mixture at 923 K is studied using stationary galvanostatic polarization curves, square-wave voltammetry, and chronopotentiometry. The melts containing 0.095–1.063 wt % UF3 are investigated. The cathodic reduction of U(III) is shown to occur in a single stage: U(III) + \(3\bar {e} \to \) U(0). According to well-known diagnostic criteria, this reaction in the uranium trifluoride concentration range under study is reversible and controlled by the processes of electroactive ion transport to an electrode. The diffusion coefficients of the complexes formed by trivalent uranium ions are calculated.