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<p>To extract the fission product Gd from spent nuclear fuel, this paper investigates the thermodynamic and kinetic parameters of Gd<sup>3+</sup> on different electrodes (Mo and Zn). On a Zn membrane electrode, the standard Gibbs free energies of formation (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\Delta {G}_{\text{f}}^{0}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi mathvariant="normal">Δ</mi> <msubsup> <mi>G</mi> <mrow> <mtext>f</mtext> </mrow> <mn>0</mn> </msubsup> </mrow> </math></EquationSource> </InlineEquation>) of four Zn-Gd alloys were calculated. On a liquid Zn electrode, the exchange current density (<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\({j}_{0}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>j</mi> <mn>0</mn> </msub> </math></EquationSource> </InlineEquation>) and saturation solubility (<InlineEquation ID="IEq3"> <EquationSource Format="TEX">\({X}_{\text{Gd}\left(\text{Zn}\right),\text{max}}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>X</mi> <mrow> <mtext>Gd</mtext> <mfenced close=")" open="("> <mtext>Zn</mtext> </mfenced> <mo>,</mo> <mtext>max</mtext> </mrow> </msub> </math></EquationSource> </InlineEquation>) were calculated, and the apparent morphologies and elemental compositions of the Zn-Gd alloys were analyzed by SEM–EDS and XRD. Additionally, through ICP-AES analysis, the extraction efficiencies of Gd<sup>3+</sup> from the system were found to be 99.15 ± 0.39, 99.09 ± 0.21, and 99.58 ± 0.16%, respectively.</p>

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Electrochemical property of Gd3+ on Mo electrode and Zn electrode in LiCl-KCl molten salt system

  • 期刊论文

  • 发表日期：

    2025年11月26日

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  • De-Bin Ji,
  • Shao-Ting Zhang,
  • Heng-Yu Tan,
  • Zhi-Qiang Qiao,
  • De-Qiang Ji

摘要

To extract the fission product Gd from spent nuclear fuel, this paper investigates the thermodynamic and kinetic parameters of Gd3+ on different electrodes (Mo and Zn). On a Zn membrane electrode, the standard Gibbs free energies of formation ( \(\Delta {G}_{\text{f}}^{0}\) Δ G f 0 ) of four Zn-Gd alloys were calculated. On a liquid Zn electrode, the exchange current density ( \({j}_{0}\) j 0 ) and saturation solubility ( \({X}_{\text{Gd}\left(\text{Zn}\right),\text{max}}\) X Gd Zn , max ) were calculated, and the apparent morphologies and elemental compositions of the Zn-Gd alloys were analyzed by SEM–EDS and XRD. Additionally, through ICP-AES analysis, the extraction efficiencies of Gd3+ from the system were found to be 99.15 ± 0.39, 99.09 ± 0.21, and 99.58 ± 0.16%, respectively.