Electrochemical co-reduction of Y(III) and Zn(II) and extraction of yttrium on Zn electrode in LiCl-KCl eutectic melts

Han, Wei; Li, Wenlong; Li, Mei; Li, Zhuyao; Yangshan, Sun; Yang, Xiaoguang; Zhang, Milin

doi:10.1007/s10008-018-3956-5

Cited by 26 publications

(15 citation statements)

References 32 publications

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“…One pair of redox signals (black solid curve), I/I 0 (À2.36/À2.23 V), was detected on W electrode in blank eutectic melts, corresponding to the deposition and dissolution of lithium metal. 17 However, when anhydrous YCl 3 was added in the melts, there is a new pair of redox peaks, II/II 0 (À2.03/À1.86 V), appearing in the red dotted curve, which is related to the deposition and dissolution of metallic Y on W electrode. 17 Subsequently, cathodic square wave voltammetry (CSWV) and anodic square wave voltammetry (ASWV) were conducted in order to study transfer electron number and diffusion coefficient of Y(III) in the melts.…”

Section: Resultsmentioning

confidence: 99%

“…The charge was calculated by integrating the current (blue dotted line) and the total electric quantity is 2016 C. The concentration of Y(III) in melts before and aer the run was measured by ICP-AES. Thus, the coulomb efficiency was computed using eqn (17), and found to be 98.1%.…”

Section: Extraction and Characterization Of Pb-y Alloymentioning

confidence: 99%

“…4a. Meanwhile, the coulomb efficiency was estimated using eqn (17) and found to be 82%, smaller than that in PE. This could be due to the high current density employed in this experiment, which will results in the deposition of Li on liquid Pb electrode at the later stage of GE and decrease of the coulomb efficiency.…”

Section: Extraction and Characterization Of Pb-y Alloymentioning

confidence: 99%

“…For example, the electrode area is changeless, and the diffusion of deposited metal into the liquid metal is easier. 6,7 Thus, liquid Ga, [7][8][9][10][11] Bi, [12][13][14][15] Cd, 13,16 Zn, [17][18][19][20][21][22][23][24] Sn 25 were selected as cathode to separate REs from molten salts. The melting point of Pb metal is 600 K and boiling point is 1798 K, it is easy to melt but doesn't evaporate at 723-823 K. Thus, Pb metal seems to be a good candidate as the cathode material in separation and extraction of REs by molten salt electrolysis.…”

Section: Introductionmentioning

confidence: 99%

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

Han

Chen

et al. 2019

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

Section: Extraction and Characterization Of Pb-y Alloymentioning

confidence: 99%

Section: Extraction and Characterization Of Pb-y Alloymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Han

Chen

et al. 2019

RSC Adv.

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“…[ 43 ] When ZnCl 2 was added to LiCl–KCl, the redox peaks III/III', in blue, were detected, which are attributed to the deposition and oxidation of Zn metal. [ 46 ]…”

Section: Resultsmentioning

confidence: 99%

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

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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.

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Electrode reaction of Pr on Sn electrode and its electrochemical recovery fromLiCl‐KClmolten salt

et al. 2021

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To recover Pr from molten chlorides, the electrode reactions of Pr 3+ on Sn-coated W and liquid Sn electrodes were studied by a group of electrochemical techniques. CV and SWV results exhibited that the electrochemical signals pertaining to the formation of Pr-Sn alloy compounds and solid solution appeared at less negative potentials than that of Pr 3+ on W electrode. The thermodynamic data of Pr-Sn alloy compounds and the kinetic parameters for PrSn 3 /Pr 3+ pair were determined employing OCP, LP, and Tafel methods, separately. The measured diffusion coefficient (D) of Pr in liquid Sn metal was 9.40 × 10 −6 cm 2 s −1 . Furthermore, the electrochemical recovering Pr from molten salt was performed using liquid Sn as a working electrode, and the formed Pr-Sn samples characterized by XRD and SEM-EDS were composed of Sn and PrSn 3 phases.

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Electrochemical co-reduction of Y(III) and Zn(II) and extraction of yttrium on Zn electrode in LiCl-KCl eutectic melts

Cited by 26 publications

References 32 publications

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

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

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

Electrode reaction of Pr on Sn electrode and its electrochemical recovery fromLiCl‐KClmolten salt

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