The dendrite growth, morphology control and deposition properties of uranium electrorefining

Liu, Kui; Tan, Tan; Zhou, Xuanpu; Zheng, Nantao; Ma, Yue; Kang, Mingliang; Wang, Biao; Chai, Zhifang

doi:10.1016/j.jnucmat.2021.153110

Cited by 22 publications

(14 citation statements)

References 21 publications

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“…Under the action of electric field forces, In 3+ migrates from the anodic region to the cathodic area, where it is reduced to In by getting three electrons at the cathode. Therefore, indium is diminished by an irreversible reaction of three electrons in one step, with a reduction potential between −0.65 V and −0.72 V and an oxidation potential between −0.42 V and −0.45 V ( Rakhymbay et al, 2016 ; Liu et al, 2021 ).…”

Section: Resultsmentioning

confidence: 99%

“…In the electrodeposition experiment, coarse indium was used as an anode and a high-purity titanium plate was used as a cathode ( Lobaccaro et al, 2014 ; Dell'Era et al, 2020 ). The electrolyte was an indium sulfate electrolytic system, and NaCl was added to enhance its conductivity ( Walsh and Gabe, 1981 ; Liu et al, 2021 ).…”

Section: Methodsmentioning

confidence: 99%

“…In the extraction and purification of indium, a combination of chemical cleaning and physical purification is mainly adopted, including the electrolytic refining method, float zone smelting method, vacuum distillation method, and metal–organic compound method ( Bardi et al, 2009 ; Liu et al, 2021 ). Based on hydrometallurgy, electrolytic refining of the aqueous solution is paid more attention because of its advantages of the simple operation process and low cost of equipment.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Mechanism of the Preparation of High-Purity Indium by Electrodeposition

Hou

Wang

et al. 2022

Front. Chem.

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Indium is a crucial material and is widely used in high-tech industries, and electrodeposition is an efficient method to recover rare metal resources. In this work, the electrochemical behavior of In3+ was investigated by using different electrochemical methods in electrolytes containing sodium and indium sulfate. Cyclic voltammetry (CV), chronoamperometry (CA), and alternating current impedance (EIS) techniques were used to investigate the reduction reaction of In3+ and the electrocrystallization mechanism of indium in the indium sulfate system. The cyclic voltammetry results showed that the electrodeposition process is irreversible. The average charge transfer coefficient a of In3+ was calculated to be 0.116 from the relationship between the cathodic peak potential and the half-peak potential, and the H+ discharge occurred at a higher negative potential of In3+. The nucleation mechanism of indium electrodeposition was analyzed by chronoamperometry. The mechanism of indium at potential steps of −0.3 to −0.6 V was close to diffusion-controlled instantaneous nucleation with a diffusion coefficient of 7.31 × 10−9 cm2 s−1. The EIS results demonstrated that the reduction process of In3+ is subject to a diffusion-controlled step when pH = 2.5 and the applied potential was −0.5 V. SEM and XRD techniques indicated that the cathodic products deposited on the titanium electrode have excellent cleanliness and purity.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electrochemical Mechanism of the Preparation of High-Purity Indium by Electrodeposition

Hou

Wang

et al. 2022

Front. Chem.

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“…The researchers managed to obtain dense and short dendrite deposits by controlling the duty cycle (0.8-0.2). 42 Not coincidentally, UO 2 was recovered from LiCl-KCl-UO 2 F 2 molten salt by pulsed electrolysis with duty cycle of 0.75 and 0.6. 43 The SEM results showed that pulse electrolysis can avoid dendrite formation (Fig.…”

Section: Process Parameters and Coating Propertiesmentioning

confidence: 99%

Review—Pulse-Electrolysis Protocols in High Temperature Molten Salt Electrochemistry

Liu,

Jiao,

Yuan

et al. 2023

J. Electrochem. Soc.

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High temperature molten salt electrochemistry (MSE) plays a crucial role in the fields of metallurgy, materials, chemical industry and many other important areas. However, the traditional constant potential or constant current electrolysis has low current efficiency and poor product performance, so researchers often use pulse-electrolysis strategy to address this challenge. In this review, we present a discussion on the application of pulse technology in high temperature MSE. Then, we clarify the influence of key factors in the pulse electrolysis process and the internal mechanism of the influence is analyzed. Finally, we conclude with a perspective on the challenges and development directions of pulse electrolysis in high temperature MSE.

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“…The electrolytic refining using molten salt as the electrolyte is regarded as one of the most prospective techniques for the recovery of SNF. 8,9 It involves two processes: dissolution at anode and electrodeposition at cathode. Therein, the dissolution at anode is a controlstep, which determines the progress of electrorefining.…”

Section: Introductionmentioning

confidence: 99%

Anodic dissolution behavior of Zr‐Dy alloy in LiCl‐KCl molten salt

Han

Yang

et al. 2022

Intl J of Energy Research

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To research Zr-Dy alloy dissolution behavior at anode, the electrode process of LiCl-KCl-K 2 ZrF 6 -DyCl 3 on an inert W electrode was firstly explored through a group of electrochemical techniques. The depolarization phenomenon was observed owing to the formation of Zr-Dy solid solution, and the redox potentials of Dy(III)/Dy, Zr(II)/Zr-Dy solid solution, Zr(IV)/Zr(II) and Zr(II)/Zr (0) were determined. Then, Zr and Zr-Dy alloy dissolution behaviors at anode were explored by cyclic voltammetry and linear sweep voltammetry. It was confirmed that the rapid dissolution potentials of Zr and Zr-Dy solid solution were observed at À0.86 V and À 1.90 V, and the passivation phenomena of Zr and Zr-Dy solid solution were also observed. Zr-Dy alloy dissolution at anode was conducted employing constant potential (CP) and current (CC) electrolysis. It was found that both Dy and Zr could be dissolved by CC electrolysis. However, Zr dissolution could be controlled by CP electrolysis. Furthermore, Zr-Dy alloy dissolution process was monitored online at different current densities, the dissolution rate increased with the increase of the applied current density.

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The dendrite growth, morphology control and deposition properties of uranium electrorefining

Cited by 22 publications

References 21 publications

Electrochemical Mechanism of the Preparation of High-Purity Indium by Electrodeposition

Electrochemical Mechanism of the Preparation of High-Purity Indium by Electrodeposition

Review—Pulse-Electrolysis Protocols in High Temperature Molten Salt Electrochemistry

Anodic dissolution behavior of Zr‐Dy alloy in LiCl‐KCl molten salt

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