Characterization of Nd-Bi intermetallic compound formations by co-reduction of Nd(III) and Bi(III) in molten LiCl-KCl eutectic

Kim, Beom Kyu; Choi, Sungyeol; Park, Byung Gi

doi:10.1016/j.electacta.2022.139849

Electrochimica Acta

2022

DOI: 10.1016/j.electacta.2022.139849

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Characterization of Nd-Bi intermetallic compound formations by co-reduction of Nd(III) and Bi(III) in molten LiCl-KCl eutectic

Beom Kyu Kim

Sungyeol Choi

Byung Gi Park

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Cited by 2 publications

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“…26-30 indicated the reduction of Nd(III) to Nd in two z E-mail: s.kuznetsov@ksc.ru; kuznet@chemy.kolasc.net.ru consecutive steps. There are many studies on the recovery of neodymium with utilization of different cathodes made of Ni, 4,[31][32][33][34][35][36][37][38][39] Cd, 12 Cu, 23,34 Fe, 40 Bi, 41,42 Sn, 42 Al. 12,23,43 The main goal of this study is to determine the standard rate constants of charge transfer (k s ) for the Nd(III)/Nd(II) redox couple and formal standard redox potentials E * Nd(III)/Nd(II) in an equimolar NaCl-KCl mixture.…”

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confidence: 99%

Electrochemistry of Neodymium in an Equimolar NaCl-KCl Melt without and with Addition of Fluoride Ions

Kuznetsov¹,

Popova²,

Stulov³

et al. 2023

J. Electrochem. Soc.

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The paper presents the results of neodymium electrochemical behavior in chloride and chloride-fluoride melts. It was shown that the process of neodymium electroreduction in the NaCl-KCl-NdCl3 melt proceeds in two stages. By diagnostic criteria of voltammetry it was established that the discharge process of Nd(III) to Nd(II) at a sweep rate in the range of 0.6 ≤  ≤ 1.0 V s-1 is not complicated by disproportionation reaction. In this study diffusion coefficients, activation energy of diffusion for Nd(III) chloride complexes and standard rate constants of charge transfer for the Nd(III)/Nd(II) redox couple in the NaCl-KCl melt were determined. The nature of the working electrode on the standard rate constants of charge transfer for the Nd(III)/Nd(II) redox couple has been studied by cyclic voltammetry and electrochemical impedance spectroscopy. The formal redox potentials E*Nd(III)/Nd(II) in the NaCl-KCl melt were obtained from the cyclic voltammetry data. It was shown that the addition of fluorine anions into the NaCl-KCl-NdCl3 melt leads to stabilization of the higher oxidation state of neodymium in chloride-fluoride melts and the intermediate oxidation state Nd(II) does not exist in these melts.

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mentioning

confidence: 99%

Electrochemistry of Neodymium in an Equimolar NaCl-KCl Melt without and with Addition of Fluoride Ions

Kuznetsov¹,

Popova²,

Stulov³

et al. 2023

J. Electrochem. Soc.

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Innovative approach for efficient extraction of Nd from electrorefining waste salt into nuclear waste forms

Zhang,

Wu,

et al. 2024

Journal of Cleaner Production

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Characterization of Nd-Bi intermetallic compound formations by co-reduction of Nd(III) and Bi(III) in molten LiCl-KCl eutectic

Cited by 2 publications

References 45 publications

Electrochemistry of Neodymium in an Equimolar NaCl-KCl Melt without and with Addition of Fluoride Ions

Electrochemistry of Neodymium in an Equimolar NaCl-KCl Melt without and with Addition of Fluoride Ions

Innovative approach for efficient extraction of Nd from electrorefining waste salt into nuclear waste forms

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