Regularities of cathode deposit formation during simultaneous reduction and exchange reactions. Influence of the electrolysis conditions on the concentration of components in the UO2-ZrO2 cathode deposit

Krotov, V. E.; Filatov, Ye.S.

doi:10.1016/j.electacta.2013.11.071

Cited by 7 publications

(8 citation statements)

References 10 publications

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“…This composition, as well as the range of electrolysis current densities were chosen based on the electrocrystallization results of the UO 2 -ZrO 2 cathode deposits containing at least 96 mol% of ZrO 2 . 4 Unlike the system with ZrCl 4 , the concentration of ThCl 4 in the electrolyte was increased by a factor of 2.5.…”

Section: Resultsmentioning

confidence: 99%

“…The deposition occurs on a Pt wire with the diameter of 1 mm. 4 After electrolysis, the diameter of the cathode deposit was 3.5 mm. We assume that the deposit forms only on the lateral surface of the platinum wire and it has the shape of a smooth cylinder.…”

Section: Resultsmentioning

confidence: 99%

“…The conditions of the X-ray phase analysis and X-ray spectral microanalysis are indicated in Ref. 4.…”

Section: Methodsmentioning

confidence: 99%

“…We synthesized UO 2 -ZrO 2 crystalline deposits, and the concentration of zirconium dioxide reached 98 mol% upon electrolysis of the salt melt (NaCl-KCl)-UO 2 Cl 2 -ZrCl 4 ; furthermore, the mechanism of their formation was suggested. [3][4][5] It seems possible to synthesize other crystalline cathode deposits based on uranium dioxide, including UO 2 -ThO 2 , using this method. The necessary condition is the presence of two simultaneous reactions occurring on the cathode.…”

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confidence: 99%

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Electrolytic Formation of Solid Crystalline UO₂–ThO₂ and UO₂–ThO₂–ZrO₂ Solutions from Salt Melts

Krotov

Filatov

2020

J. Electrochem. Soc.

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For the first time, crystalline solid solutions of UO2–ThO2 and UO2–ThO2–ZrO2 have been electrolytically prepared. The mechanism of their formation in molten halides is presented. The influence of the electrolysis current density on the compositions of the cathode deposits has been established and explained. We also established the effect of zirconium ions on the ThO2 content in the UO2–ThO2–ZrO2 cathode deposits.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…The conditions of the X-ray phase analysis and X-ray spectral microanalysis are indicated in Ref. 4.…”

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Electrolytic Formation of Solid Crystalline UO₂–ThO₂ and UO₂–ThO₂–ZrO₂ Solutions from Salt Melts

Krotov

Filatov

2020

J. Electrochem. Soc.

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“…It was reported that the electrolysis product was a solid solution of UO 2 and CeO 2 , and the unit cell parameters of UO 2 decreased with the increase of CeO 2 content. Krotov et al 30,31 studied the influence of Zr 4+ on the deposition mechanism of UO and Pd could be co-deposited with UO 2 , which was not conducive to the removal of noble metals during electrorefining process. Kosugi et al 10 studied the effects of noble metals on the behavior of electrodeposited UO 2 under low current density.…”

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confidence: 99%

Impact of Ag on Electrochemical Recovery of UO₂ in Molten LiCl-KCl Salt

Han,

Lan,

Zhang

et al. 2023

J. Electrochem. Soc.

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To investigate the effect of fission element Ag on the electrochemical recovery of UO2, the electroreduction mechanisms of Ag+ and UO 2 2 + , kinetic property of Ag+/Ag couple were first studied on W electrode by different electrochemical techniques. The electrode reactions of Ag+ and UO 2 2 + were found to be one-step and two-step reduction processes, respectively. The exchange current density of Ag+/Ag couple was estimated to be 0.0431∼0.0727 A cm−2 in the temperature range of 723∼798 K by LP technique, and its activation energy was evaluated to be 33.91 kJ mol−1. The deposition products obtained by constant potential electrolysis (CPE) were characterized by XRD and SEM-EDS, which showed the formed Ag and UO2 having pine-branch and micron-scale polyhedral structure, respectively. The influence of Ag+ on the electrochemical behavior of UO 2 2 + and morphology of UO2 were studied. The deposition potential of Ag+ was close to that of UO 2 + to UO2. The changes of Ag+ concentration and scan rate had no effect on the electroreduction mechanism of UO 2 2 + . CPE was conducted, and the result indicated that UO2 and Ag could be co-deposited. The deposited Ag could change the morphology of recovered UO2.

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Anomalous Influence of Electrochemically Inert ZrCl4 on UO2 Current Efficiency During Electrolysis in (NaCl-KCl)equim-UO2Cl2-ZrCl4 Melt

Krotov

Filatov

2014

Electrochimica Acta

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Regularities of cathode deposit formation during simultaneous reduction and exchange reactions. Influence of the electrolysis conditions on the concentration of components in the UO2-ZrO2 cathode deposit

Cited by 7 publications

References 10 publications

Electrolytic Formation of Solid Crystalline UO₂–ThO₂ and UO₂–ThO₂–ZrO₂ Solutions from Salt Melts

Electrolytic Formation of Solid Crystalline UO₂–ThO₂ and UO₂–ThO₂–ZrO₂ Solutions from Salt Melts

Impact of Ag on Electrochemical Recovery of UO₂ in Molten LiCl-KCl Salt

Anomalous Influence of Electrochemically Inert ZrCl4 on UO2 Current Efficiency During Electrolysis in (NaCl-KCl)equim-UO2Cl2-ZrCl4 Melt

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Regularities of cathode deposit formation during simultaneous reduction and exchange reactions. Influence of the electrolysis conditions on the concentration of components in the UO2-ZrO2 cathode deposit

Cited by 7 publications

References 10 publications

Electrolytic Formation of Solid Crystalline UO2–ThO2 and UO2–ThO2–ZrO2 Solutions from Salt Melts

Electrolytic Formation of Solid Crystalline UO2–ThO2 and UO2–ThO2–ZrO2 Solutions from Salt Melts

Impact of Ag on Electrochemical Recovery of UO2 in Molten LiCl-KCl Salt

Anomalous Influence of Electrochemically Inert ZrCl4 on UO2 Current Efficiency During Electrolysis in (NaCl-KCl)equim-UO2Cl2-ZrCl4 Melt

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Electrolytic Formation of Solid Crystalline UO₂–ThO₂ and UO₂–ThO₂–ZrO₂ Solutions from Salt Melts

Electrolytic Formation of Solid Crystalline UO₂–ThO₂ and UO₂–ThO₂–ZrO₂ Solutions from Salt Melts

Impact of Ag on Electrochemical Recovery of UO₂ in Molten LiCl-KCl Salt