Preparation and characterization of Sm2Fe17 alloy in LiF-CaF2-SmF3 molten salt

Yan, Qi-Cao; Guo, Xing‐Min

doi:10.1016/j.jallcom.2018.03.048

Cited by 17 publications

(5 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, for recovery of samarium the discharge of Sm(III) on the reactive cathodes with the formation of intermetallic compounds is used. There are a lot of studies on the recovery of samarium with utilization of different cathodes from Cu, 9 Mg, 10,11 Zn,, 12,13 Cd, 14,15 Al, [16][17][18][19][20] Ga, 21,22 Sn,, 23 Bi, 14,15,24,25 Fe, 26,27 Co, [28][29][30] Ni. [30][31][32][33] At the same time, the number of studies devoted to the behavior of the Sm(III)/Sm(II) redox couple is small.…”

mentioning

confidence: 99%

Kinetic and Thermodynamic Properties of Samarium Chlorides Dissolved in Alkali Chloride Melts Obtained by Electrochemical Transient Techniques

Kuznetsov

Stulov

Gaune‐Escard

2021

J. Electrochem. Soc.

View full text Add to dashboard Cite

The electrochemical behavour of samarium in NaCl-KCl, KCl and CsCl melts have been studied in the temperature range 973–1173 K by different electrochemical methods. The diffusion coefficients (D) of Sm(III) and Sm(II) have been determined by linear sweep voltammetry, chronopotentiometry and chronoamperometry methods. The standard rate constants of charge transfer (k s) for the Sm(III)/Sm(II) redox couple have been calculated on the basis of cyclic voltammetry data using Nicholson’s equation. The nature of working electrode on the standard rate constants of charge transfer for the Sm(III)/Sm(II) redox couple has been studied. The formal redox potentials E * Sm(III)/Sm(II) have been obtained in alkali chloride melts from the cyclic voltammetry data.

show abstract

mentioning

confidence: 99%

Kinetic and Thermodynamic Properties of Samarium Chlorides Dissolved in Alkali Chloride Melts Obtained by Electrochemical Transient Techniques

Kuznetsov

Stulov

Gaune‐Escard

2021

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…It is clear that the reduction peak potential of Dy(III) is almost constant as the frequency varies, indicating that the electrode reaction is reversible. In the inset, the peak current is a good linear relationship with the square root of frequency, demonstrating that the deposition of Dy(III) on liquid Zn electrode is controlled by diffusion, and equation can be used to calculate the diffusion coefficient: [ 45,52,53 ]

I_{p} = {nFAC}_{0} \frac{1 - σ}{1 + σ} \sqrt{\frac{italicDν}{π}} σ = \exp ((), \frac{{nFE}_{sw}}{2 RT})

where E sw is the amplitude of SWV (V) and the other physical quantities have the same meaning as mentioned earlier.…”

Section: Resultsmentioning

confidence: 86%

Electroreduction of Dy(III) assisted by Zn and its co‐deposition with Zn(II) in LiCl–KCl molten salt

Han

et al. 2020

Applied Organom Chemis

View full text Add to dashboard Cite

To recover dysprosium (Dy) from LiCl–KCl molten salt, the electrochemical mechanism of Dy(III) on liquid Zn electrode and co‐deposition of Dy(III) and Zn(II) on W electrode were studied using electrochemical methods. Cyclic voltammetry results demonstrated that the redox process of Dy on liquid Zn electrode is reversible and controlled by diffusion. Reverse chronopotentiograms showed that the transition time ratio of reduction and oxidation is ~3:1, revealing the redox of Dy on liquid Zn electrode is a kind of soluble–soluble system: Dy(III) + 3e− = (Dy–Zn)solution. The half‐wave potential of Dy(III) was almost constant with the increase in scanning rate. The electrochemical separation of metallic Dy from the molten salt was performed using constant potential electrolysis, and the product characterized using X‐ray diffraction and scanning electron microscopy–energy‐dispersive X‐ray spectroscopy was the thermodynamic unstable compound DyZn5. Also, the co‐deposition mechanism of Dy(III) and Zn(II) was explored, indicating that Dy(III) could deposit on pre‐deposited Zn and form Dy–Zn compounds: Zn(II) + 2e− = Zn and xDy(III) + yZn + 3xe− = DyxZny. Moreover, the effect of Dy(III) concentration on the formation of Dy–Zn compounds was investigated. The redox peak currents corresponding to different Dy–Zn compounds changed with the increase in Dy(III) concentration. The co‐deposition of Dy(III) and Zn(II) was performed using constant current electrolysis at diverse Dy(III) concentrations. The different Dy–Zn compounds were produced by controlling Dy(III) concentration.

show abstract

“…The relationship of peak current and square root of the frequency shows a good linear relationship and doesn't go through the origin, indicating the reduction of Y(III) on W electrode isn't reversible and controlled by diffusion of Y(III). 42 In addition, the peak potentials of CSWV change to more negative direction slightly with the frequency increases, indicating the process of redox is quasi-reversible. Based on eqn (3), 43,44 the diffusion coefficient of Y(III) was obtained to be 2.95 Â 10 À5 cm 2 s À1 and is listed in Table 1, which is slightly larger than 1.29 Â 10 À5 cm s À1 obtained by Castrillejo.…”

Section: Resultsmentioning

confidence: 97%

“…Many researchers investigate the extraction of REs on various electrodes in molten salts. [2][3][4][5] It is reported that liquid metal as working electrode possesses many advantages compared with solid electrode. For example, the electrode area is changeless, and the diffusion of deposited metal into the liquid metal is easier.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical properties of yttrium on W and Pb electrodes in LiCl–KCl eutectic melts

Han

Chen

et al. 2019

RSC Adv.

View full text Add to dashboard Cite

show abstract

Preparation and characterization of Sm2Fe17 alloy in LiF-CaF2-SmF3 molten salt

Cited by 17 publications

References 57 publications

Kinetic and Thermodynamic Properties of Samarium Chlorides Dissolved in Alkali Chloride Melts Obtained by Electrochemical Transient Techniques

Kinetic and Thermodynamic Properties of Samarium Chlorides Dissolved in Alkali Chloride Melts Obtained by Electrochemical Transient Techniques

Electroreduction of Dy(III) assisted by Zn and its co‐deposition with Zn(II) in LiCl–KCl molten salt

Electrochemical properties of yttrium on W and Pb electrodes in LiCl–KCl eutectic melts

Contact Info

Product

Resources

About