Electrochemical and spectrophotometric study on neodymium ions in molten alkali chloride mixtures

Fukasawa, Kazuhito; Uehara, Akihiro; Nagai, Takayuki; Fujii, Toshiyuki; Yamana, Hideaki

doi:10.1016/j.jallcom.2011.01.192

Cited by 45 publications

(32 citation statements)

References 26 publications

(39 reference statements)

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“…1a and b, cathodic current i c1 associated with anodic peak i a1 is attributable to the Nd(III)/Nd(II) redox couple, and the other sharp peak pair, i c2 and i a2 , correspond to the Nd(II)/Nd(0) redox couple. Both reactions were examined to be reversible [13].…”

Section: Resultsmentioning

confidence: 99%

Electrochemical and spectrophotometric study on trivalent neodymium ion in molten binary mixtures of LiCl and alkali earth chlorides

Fukasawa

Uehara

Nagai

et al. 2011

Journal of Nuclear Materials

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Section: Resultsmentioning

confidence: 99%

Electrochemical and spectrophotometric study on trivalent neodymium ion in molten binary mixtures of LiCl and alkali earth chlorides

Fukasawa

Uehara

Nagai

et al. 2011

Journal of Nuclear Materials

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“…The CV for LiCl-KCl-1 wt% NdCl 3 at 773 K was measured by using an inactive W electrode. [13,14,25,26]. Those studies concluded that the Nd(III)/Nd(0) redox reaction proceeds through the intermediate process of Nd(II) ion generation, resulting in the two-step reaction takes place as described below.…”

Section: Electrochemical Apparatus and Methodsmentioning

confidence: 95%

“…In the experiment using LiCl-KCl-NdCl 3 , the study conducted the CV at a scan rate of 0.01 V/s to 0.25 V/s, and concluded that the Nd(II)/Nd(0) reaction was reversible in the range of 0.01 V/s to 0.05 V/s, and quasi-reversibly in the range of 0.075 V/s to 0.25 V/s [25]. On the other hand, a study by Fukasawa et al performed the CV at a scan rate of 0.1 V/s and showed that the Nd(II)/Nd(0) reaction was reversible [26]. Thus, the overall results suggest that the scan rate has a significant influence on the Nd(II)/Nd(0) reaction according to the detailed experimental conditions and the configuration of the electrolytic cell.…”

Section: Analysis Of Peak I Cmentioning

confidence: 99%

Electrode Reactions of Nd3+/Nd Couple in LiCl-KCl-NdCl3 Solutions at Solid W and Liquid Cd Electrodes

Sim

Kim²,

Paek

et al. 2018

International Journal of Electrochemical Science

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The behavior of Nd(III)/Nd(0) redox reaction at a solid tungsten (W) and liquid cadmium (Cd) electrodes in the LiCl-KCl-NdCl 3 system at 773 K was analyzed by using a cyclic voltammetry. The Nd(III)/Nd(0) reaction in the solid W electrode was found to occur in two steps through the process of Nd(II) ion generation. As the analytic results of the maximum current value according to scan rates in the region of 0.05 V/s to 0.3 V/s, the Nd(III)/Nd(II) reaction showed reversible reaction characteristics over the whole range, while the Nd (II)/Nd(0) reaction showed the reversible reaction in the region of 0.05 V/s to 0.2 V/s, as well as the quasi-reversible in the range of 0.2 V/s or higher. Furthermore, the diffusion coefficients of Nd(III) ion and Nd(II) ion were calculated by using the maximum current value, which were considerably consistent with the previous results of other researchers. The reduction potential of the Nd (III)/Nd(0) reaction in the liquid Cd electrode was measured as approximately 0.54 V higher than that of the solid W electrode because the reduced Nd formed an Nd-Cd intermetallic compound with a liquid Cd electrode, lowering the activity of Nd. To confirm this mechanism, experiments using Cd-coated W electrodes were conducted by using cyclic voltammetry and chronopotentiometry. The experimental results showed that 6 Nd-Cd intermetallic compounds were present. When the ratio of Cd is the highest, NdCd 11 is formed, and the potential in this case was very similar to the potential at the liquid Cd electrode. Furthermore, the Gibbs free energy and activity coefficient of Nd-Cd intermetallic compounds were calculated by analyzing the results of chronopotentiometry. The results could thermodynamically explain the potential difference of the Nd(III)/Nd(0) reactions occurring between the solid W electrode and the liquid Cd electrode.

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“…Так, эти вопросы, а также определение кинетических параметров электродных процессов в низкотем-пературном хлоридном расплаве LiCl-KCl и рас-плаве LiCl-CaCl 2 являются предметом изучения японских, испанских и российских ученых [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Электрохимическому получению сплавов интер-металлических соединений на основе празеоди-ма и неодима в галогенидных расплавах методом диффузионного насыщения посвящены работы [16][17][18].…”

Section: № 1 2014unclassified

Electrochemical synthesis of nanosized powders of neodymium and praseodymium hexaborides and ternary compounds based on neodymium (praseodymium), boron and iron group metals from chloride-fluoride melts.

Кушхов¹,

Chuksin²,

Zhanikaeva³

2015

Izv. vuzov, Porošk. metall. funkc. pokryt.

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Electrochemical and spectrophotometric study on neodymium ions in molten alkali chloride mixtures

Cited by 45 publications

References 26 publications

Electrochemical and spectrophotometric study on trivalent neodymium ion in molten binary mixtures of LiCl and alkali earth chlorides

Electrochemical and spectrophotometric study on trivalent neodymium ion in molten binary mixtures of LiCl and alkali earth chlorides

Electrode Reactions of Nd3+/Nd Couple in LiCl-KCl-NdCl3 Solutions at Solid W and Liquid Cd Electrodes

Electrochemical synthesis of nanosized powders of neodymium and praseodymium hexaborides and ternary compounds based on neodymium (praseodymium), boron and iron group metals from chloride-fluoride melts.

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