Electrochemical behavior of La(III) on the zinc-coated W electrode in LiCl-KCl eutectic

Liu, Yalan; Guoan, Ye; Liu, Kui; Yuan, Liyong; Chai, Zhifang; Shi, Wei‐Qun

doi:10.1016/j.electacta.2015.03.219

Cited by 49 publications

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References 28 publications

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“…Understanding these properties will allow for an effective separation of actinides from rare earth elements during the electrodeposition process and for molten salt recycling. Therefore, it is not surprising that the study of thermodynamic and transport properties of these elements in molten salt under the operating conditions of electrochemical separation has been the subject of several investigations over the past two decades [4][5][6][7][8][9].…”

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confidence: 99%

“…Lanthanum, which exists in the form of La (III) cations in the melt, is a rare earth element and a fission product. Therefore, its electrochemical properties have also recently been examined by several studies [5,10,11]. Liu et al [5] studied the cyclic voltammogram (CV) obtained on a W electrode) at 723K with a LaCl 3 concentration of 9.74×10 -5 mol/cm 3 .…”

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confidence: 99%

“…Therefore, its electrochemical properties have also recently been examined by several studies [5,10,11]. Liu et al [5] studied the cyclic voltammogram (CV) obtained on a W electrode) at 723K with a LaCl 3 concentration of 9.74×10 -5 mol/cm 3 . The authors found that the La (III) reduction takes place at about -2.11 V (vs. Ag/AgCl (1 wt% AgCl) in a single solubleinsoluble electrochemical step La(III)/La(0).…”

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confidence: 99%

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Estimation of key physical properties for LaCl3 in molten eutectic LiCl–KCl by fitting cyclic voltammetry data to a BET-based electrode reaction kinetics model

Samin

Wang

Lahti

et al. 2016

Journal of Nuclear Materials

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Understanding the electrochemical properties of rare earth elements is important for developing efficient techniques for separating rare earth elements from actinides recovered during the electrodeposition process. In this study the cyclic voltammetry for lanthanum in molten LiCl-KCl eutectic was recorded at 773 K for different scan rates and different bulk concentrations. A model accounting for mass transport, kinetics and adsorption was applied to analyze the experimental data via performing a nonlinear least squares fit. The results of the simulation are compared against the results of a conventional analysis of the cyclic voltammograms and against the existing literature. At the scan rates used, the reduction/oxidation process is quasi-reversible. The values of diffusivities derived from

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Estimation of key physical properties for LaCl3 in molten eutectic LiCl–KCl by fitting cyclic voltammetry data to a BET-based electrode reaction kinetics model

Samin

Wang

Lahti

et al. 2016

Journal of Nuclear Materials

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“…Shi et al. measured the thermodynamical properties of Al−La, Zn−La, Zn‐Nd intermetallic compounds in LiCl‐KCl melts by the electromotive force (emf) measurements . Castrillejo et al.…”

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Electrochemical Synthesis and Thermodynamic Properties of Pr‐Ni Intermetallic Compounds in a LiCl‐KCl‐NiCl₂‐PrCl₃ Melt

et al. 2019

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In this report, the electrochemical behaviors of Pr(III) and Ni(II) ions on a W electrode were investigated in LiCl-KCl eutectic by cyclic voltammetry (CV), square wave voltammetry (SWV), chronopotentiometry (CP) and open-circuit chronopotentiometry (OCP) techniques. From the results of electrochemical methods, different signals corresponding to seven kinds of intermetallic compounds in the phase diagram of PrÀ Ni were observed. The thermodynamic properties of intermetallic compounds in the temperature range of 823-923 K were investigated by open-circuit chronopotentiometry. With the eval-uated apparent standard potentials of PrÀ Ni intermetallic compounds, the Gibbs energies, enthalpies and entropies of formation were also calculated. The co-reduction products by galvanostatic and potentiostatic electrolysis were characterized based on X-ray diffraction (XRD) and scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectroscopy (EDS). The shape of the alloy obviously changes from granular to bulk, and the alloy phase changes from Pr-rich to Ni-rich. The co-reduction products of PrNi 5 , PrNi 2 and PrNi were identified.

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“…The numerical approach has enhanced the understanding of cyclic voltammetry and has enabled investigators to account for complicated phenomena such as adsorption effects. Accounting for such effects and changes in the electrode morphology is especially important for soluble-to-insoluble redox systems which are encountered in electrodeposition studies (including zinc, 7 nickel 8 and cobalt 9 for example) and in pyroprocessing studies where it is important to understand the electrochemical properties of lanthanide fission products (such as cerium, 10 lanthanum, 11 and erbium 12 ).…”

Section: Introductionmentioning

confidence: 99%

A one-dimensional stochastic approach to the study of cyclic voltammetry with adsorption effects

Samin

2016

AIP Advances

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In this study, a one-dimensional stochastic model based on the random walk approach is used to simulate cyclic voltammetry. The model takes into account mass transport, kinetics of the redox reactions, adsorption effects and changes in the morphology of the electrode. The model is shown to display the expected behavior. Furthermore, the model shows consistent qualitative agreement with a finite difference solution. This approach allows for an understanding of phenomena on a microscopic level and may be useful for analyzing qualitative features observed in experimentally recorded signals.

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Electrochemical behavior of La(III) on the zinc-coated W electrode in LiCl-KCl eutectic

Cited by 49 publications

References 28 publications

Estimation of key physical properties for LaCl3 in molten eutectic LiCl–KCl by fitting cyclic voltammetry data to a BET-based electrode reaction kinetics model

Estimation of key physical properties for LaCl3 in molten eutectic LiCl–KCl by fitting cyclic voltammetry data to a BET-based electrode reaction kinetics model

Electrochemical Synthesis and Thermodynamic Properties of Pr‐Ni Intermetallic Compounds in a LiCl‐KCl‐NiCl₂‐PrCl₃ Melt

A one-dimensional stochastic approach to the study of cyclic voltammetry with adsorption effects

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Electrochemical behavior of La(III) on the zinc-coated W electrode in LiCl-KCl eutectic

Cited by 49 publications

References 28 publications

Estimation of key physical properties for LaCl3 in molten eutectic LiCl–KCl by fitting cyclic voltammetry data to a BET-based electrode reaction kinetics model

Estimation of key physical properties for LaCl3 in molten eutectic LiCl–KCl by fitting cyclic voltammetry data to a BET-based electrode reaction kinetics model

Electrochemical Synthesis and Thermodynamic Properties of Pr‐Ni Intermetallic Compounds in a LiCl‐KCl‐NiCl2‐PrCl3 Melt

A one-dimensional stochastic approach to the study of cyclic voltammetry with adsorption effects

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Electrochemical Synthesis and Thermodynamic Properties of Pr‐Ni Intermetallic Compounds in a LiCl‐KCl‐NiCl₂‐PrCl₃ Melt