PROGRESS IN NUCLEAR ENERGY
·
2026
·
IF 3.2
Yixuan Cai,Mei Li,Hedi Wei,Xudong Wang,Jiayi Chen,Jia Yan,Rugeng Liu,Linshan Zhang,Wei Han
To electrodeposit uranium dioxide from LiCl–KCl molten salt containing Cr 3+ and Ni 2+ , a series of electrochemical techniques were employed to investigate the electrochemical behavior of UO 2 2+ , Cr 3+ , and Ni 2+ . CV and SWV measurements revealed that Cr 3+ is reduced to metallic Cr through a two-step process, while Ni 2+ undergoes a one-step, two-electron process to form metallic Ni. UO 2 2+ is reduced to uranium dioxide via two successive one-electron transfer steps, and its reduction mechanism remains unaffected by the presence of Cr 3+ and Ni 2+ . Chronoamperometry was employed to study the influence of Cr 3+ on the nucleation mechanism of UO 2 2+ , which indicated that the addition of Cr 3+ could decrease the nucleation density of uranium dioxide. In addition, the effects of Cr 3+ and Ni 2+ on the electrodeposition of uranium dioxide were separately explored. In the presence of Cr 3+ , the deposited product contained only uranium dioxide and no Cr was deposited, but the current efficiency was reduced. Pulse electrolysis was carried out and found that current efficiency could be improved by pulse electrolysis in the presence of Cr 3+ . The introduction of Ni 2+ led to the co-deposition of uranium dioxide and Ni, while significantly accelerating the extraction rate of uranium dioxide. Thermodynamic analysis and experimental results indicate that this enhancement arises from the in situ reduction of UO 2 2+ by the deposited Ni, a process that proceeds much faster than the direct electrochemical reduction of UO 2 2+ .
✓ 已验证
DOI
高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2020
·
IF 2.485
Yi-Chuan Liu,Ya-Lan Liu,Lin Wang,Yu-Ke Zhong,Mei Li,Wei Han,Yuan Zhao,Tong Zhou,Qing Zou,Xian Zeng,Wei-Qun Shi
As a typical uranium oxide , the electrochemical behaviors of U 3 O 8 in molten salt have attracted many research endeavors, but its dissolution behavior and related mechanism in molten salt has been less well understood. In this work, we reported the dissolution of U 3 O 8 in LiCl-KCl eutectic with the assistance of NH 4 Cl, which has potential significance for the pyrochemical reprocessing of spent oxide fuels. The spectroscopic techniques such as fluorescence emission spectroscopy, UV-Vis absorption spectroscopy , and X-ray Absorption Fine Structure (XAFS) were used to determine the chemical species during the dissolution process of U 3 O 8 . The results show that U 3 O 8 can be completely dissolved in molten salt under the air atmosphere, and it exists in the form of [UO 2 Cl 4 ] 2− . In contrast, under an argon atmosphere , the soluble [UO 2 Cl 4 ] 3− and insoluble UO 2 were detected as the main products.
研究领域:
化学
·
核能工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2025
·
IF 3.2
Yuncong Ding,Xinyu Zhang,Xiaorui Xu,Changzu Zhu,Jia Song,Dezhong Wang,Shaoqiang Guo,Wentao Zhou
Investigating electrochemical behavior of lanthanides in molten salt systems is of significant interest for advancing pyroprocessing. This study aims to elucidate the impact of Cs + addition on the electrochemical behavior of CeCl 3 in molten LiCl-KCl eutectic. Several electrochemical methods, including square wave voltammetry (SWV), cyclic voltammetry (CV), chronopotentiometry (CP), open circuit potential (OCP), and linear polarization (LP), were employed to determine the electron transfer number, reversibility, diffusion coefficient, equilibrium potential, and exchange current density. The results show that Cs⁺ has no significant effect on the electron transfer number or the reversibility of the Ce 3+ /Ce reaction. However, the equilibrium potential of Ce 3+ /Ce redox couple shifts negatively with increasing Cs⁺ concentration. Moreover, Cs⁺ led to a reduction of approximately 19.3% in the diffusion coefficient (determined by CP) and an 11.1% decrease in the exchange current density. The relationship between viscosity and diffusion coefficient was further elucidated through molecular dynamics (MD) simulations.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2021
·Vol. 45
·期 6
·8577-8592
·
IF 5.164
Wei Han,Wei Wang,Yongqiang Zhang,Yijie Wang,Mei Li,Yang Sun
Summary 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.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2020
·
IF 2.485
Yi-Chuan Liu,Ya-Lan Liu,Yuan Zhao,Zhe Liu,Tong Zhou,Qing Zou,Xian Zeng,Yu-Ke Zhong,Mei Li,Zhong-xuan Sun,Wei-Qun Shi
For UO 2 -based spent fuel , it is usually electrochemically reduced and then refined in molten salt with respect to the so-called pyrochemical reprocessing approach. In this work, we report a new method with the assistance of NH 4 Cl to directly achieve convenient separation of UO 2 over La 2 O 3 in Ar atmosphere which does not require an electrochemical process . According to the results from both powder and pellet samples, the separation is achieved by dissolving La 2 O 3 into the LiCl–KCl molten salt with NH 4 Cl, whilst UO 2 cannot be dissolved and remains in solid form. It was found that the dissolution kinetics of La 2 O 3 in the powder sample was fast and its removal efficiency in the mixture of La 2 O 3 and UO 2 was high, but a specific amount of UO 2 was also dissolved, which lead to a low recovery efficiency of UO 2 . In contrast, when the pellet samples after sintering at 1473 K were used, the recovery efficiency of UO 2 can be increased. Nevertheless, the dissolution kinetics of La 2 O 3 was correspondingly reduced, and more NH 4 Cl was required to complete the dissolution reaction . By improving and optimizing the experimental conditions, the UO 2 recovery efficiency of 92.0% can be achieved, while the removal efficiency of La 2 O 3 was 94.4%. More importantly, this novel separation method may be also useful for the separation of UO 2 over mixed lanthanide oxides.
研究领域:
核化学与化工
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
·
2016
·
IF 2.129
Zhangyang Kang,Maogang He,Guangxuan Lu,Ying Zhang
Differential scanning calorimetry analysis of the various compositions in the (LiCl+CsCl) and (LiCl+KCl+CsCl) systems have been performed, and the composition of 55.5:19.5:25 mol% and 263 °C were considered as a eutectic point in the (LiCl+KCl+CsCl) ternary system . A careful evaluation and optimization of our measured phase diagram data and all the other available experimental data for the (LiCl+CsCl) and (LiCl+KCl+CsCl) systems were performed to obtain optimized model parameters for all solid and liquid phases . A thermodynamic data set has been formed and may be used to calculate phase equilibrium and all thermodynamic properties in the (LiCl+KCl+CsCl) ternary system . A density model based on the Modified Quasichemical Model has been employed to evaluate all available density data of the (LiCl+KCl), (KCl+CsCl), (LiCl+CsCl) and (LiCl+KCl+CsCl) melts, and optimized parameters for the density model generated a useful database that can be used to complete a prediction for the density of all liquid phases .
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Zeng Chen,Shengjun Li,Wei Li,Yumin Wang,Chunli Diao,Xiyang Jia,Qingqing Pei,Sihan Wang,Dawei Zhang,Weifeng Zhang
The preparation of suitable SiC fiber (SiC f )/Al precursors is crucial for the fabrication of SiC f -strengthened Al alloys . In this work, a SiC f /Al precursor was prepared by pulse current deposition in a molten LiCl–KCl–AlCl 3 melt. The electrochemical deposition of Al 3+ was separately investigated on the Mo wire, Cu wire, SiC f , and Cu-coated SiC f electrodes. The intermediate Cu layer can eliminate the Li generated by the underpotential deposition on the carbon layer outside SiC f . In addition, open circuit chronopotentiometry was performed to confirm the reduction processes of Al 3+ on the Cu wire and Cu-coated SiC f , and the results indicate that Al 3+ exhibits similar reduction processes on the two electrodes. The deposited Al layer possibly formed Al–Cu alloys with the intermediate Cu layer on SiC f , which was beneficial to the connection between the Al layer and SiC f substrate. Scanning electron microscopy was employed to investigate the morphology and microstructure of the prepared SiC f /Al fiber. After the pulse current was optimized, a compact and even layer of Al was deposited on SiC f .
研究领域:
材料科学
·
金属基复合材料
·
电化学
·
冶金工程
·
纳米材料制备
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 6
·062511
·
IF 4.316
Da-Wei Yang,Shi-Lin Jiang,Ya-Lan Liu,Tai-Qi Yin,Mei Li,Lin Wang,Wan Luo,Zhi-Fang Chai,Wei-Qun Shi
Studying the electrodeposition mechanism of La3+ in LiCl-KCl salt is extremely important for understanding the main characteristics of the deposition of An/Ln in the pyrochemical reprocessing of spent nuclear fuels. In this work, cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and Tafel methods were employed to investigate the electrodeposition mechanism and kinetic processes of La3+ on Al, Ga and Al-Ga alloy cathodes in LiCl-KCl eutectic salt at the temperature range of 723−873 K. The EIS spectra were measured by applying a minimum overpotential near the equilibrium potential, and the suitable equivalent circuits were fitted. The values of exchange current density (i0) calculated by EIS ranged from 0.078 to 0.42 A cm−2. Finally, Al2Ga2La ternary and Al3La, Ga6La binary alloys were obtained by the potentiostatic electrolysis, which were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS).
研究领域:
材料科学
·
电化学工程
·
核能技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Zhuyao Li,Liandi Zhu,Hui Liu,Yuzhi Lin,Dandan Tang,Limin Zhou,Ying Dai,Zhi Gao,Feiqiang He,Kai Guo,Neng Yu,Zhirong Liu
The highly effective separation of two adjacent rare earth is significant to the rare earth and nuclear industries. This paper investigates the highly effective separation of Gd over Eu using liquid lead–bismuth eutectic (LBE) alloy cathode in molten LiCl-KCl-EuCl 3 -GdCl 3 by pulse potential electrolysis (PPE). Underpotential deposition of Eu and Gd is observed on the LBE alloy, with a depolarization value far greater than that of the liquid Pb electrode. Furthermore, the higher exchange current density and the lower activation energy of the electrode reaction indicate that the LBE alloy cathode has higher kinetic performance than the liquid Pb. Then, the practical electro-separation in LiCl-KCl-EuCl 3 -GdCl 3 systems is carried out by applying different electrolysis technology. The effects of varying electrolysis methods and parameters on separation factor ( SF ), extraction efficiency, cathode product morphology, and crystal size are studied and compared. The results show that both the extraction efficiency and the separation factor obtained by the PPE are the largest. The calculated extraction efficiency of Gd and the actual separation factor SF Gd/Eu of Gd/Eu could be up to 99.1 % and 759, respectively.
研究领域:
材料科学
·
核工业
·
稀土分离技术
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 48
·期 3
·1233-1240
·
IF 3.3
Li Ding,Xin Kong,Yan Gong,Shanxin Yang,Yongde Yan,Yuan Deng,Yun Xue,Kai Zhu,Fuqiu Ma,Wei Liu
Bismuth (Bi) is a potential cathode material to drive the development of Gd extraction by molten salt electrolysis. However, study on the electrolytic reduction of Gd by Bi electrode in melts has not receive sufficient attention and understanding. Therefore, in this work, the electrochemical reactions, kinetic processes and thermodynamic properties in the electrolytic extraction of Gd were investigated by various electrochemical methods. The electrochemical results showed that only two Gd–Bi alloys were formed in the electrode reaction. Moreover, the exchange current density and activity coefficient during electrolysis were determined by galvanostatic pulse (GP) and Coulomb titration, respectively. The temperature dependence of both exchange current density and activity coefficient was further revealed. Finally, Gd was successfully extracted in the form of alloys through potentiostatic electrolysis.
研究领域:
冶金学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2025
·
IF 3.2
Chengyu Wang,Xiaorui Xu,Yang Tong,Wentao Zhou,Yafei Wang
Pyroprocessing of spent nuclear fuel is an important step in nuclear fuel cycle with the purpose of minimizing the radiation impact on environment and recycling useful elements. One major concern in the development of pyroprocessing is the structural material corrosion in LiCl-KCl molten salt electrolyte, which is the core component of the spent nuclear fuel reprocessing. To understand the influence of O 2- impurity on the structural material corrosion in LiCl-KCl molten salt, the study investigates the corrosion behavior of Inconel 600 alloy in LiCl-KCl molten salt containing different amounts of O 2- impurities at 500 °C by immersion corrosion experiments and electrochemical analyses.The results indicate that O 2- could accelerate the high-temperature corrosion behavior. The alloy surface developed a bilayer oxide structure following 500-hour exposure to molten salt with 3 mol% O 2- , identified as a 3.36-μm-thick outer Li 2 NiO 2 layer and a 1.11-μm-thick inner LiCrO 2 layer. Based on the corrosion behaviors of Inconel 600 alloy in LiCl-KCl molten salt with different amounts of O 2- impurities, a new O 2- affected corrosion mechanism involving the formation of dual-layer oxide films and nickel-rich particles was proposed, which could provide new insights for the corrosion study in the applications of pyroprocessing of spent nuclear fuel.
研究领域:
核能工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Sun Jiaqi,Peng Yaru,Chen Zeng
Applications of the molten salt electrodeposition method have attracted researcher’s attention in the preparation of magnesium-based alloys in the past decades. Sometimes, hot corrosion occurs on the surface of a metal electrode in molten salt. Here, the corrosion of a Ni electrode and its effect on the electrochemical formation processes of Mg-Ni alloys were studied in LiCl-KCl-MgCl 2 molten salt under an Ar atmosphere. Immersion experiments and some electrochemical experiments, such as cyclic voltammetry (CV), open-circuit chronopotentiometry (OCP), and potentiostatic electrolysis, were carried out to investigate the performance of a Ni metal electrode in LiCl-KCl-MgCl 2 molten salt. Hot corrosion of the Ni electrode became serious with the addition of MgCl 2 , and MgO was deposited on the surface of the Ni sheet. The CV and OCP experiments showed that the water introduced from outside had serious effects on the electrochemical reaction processes in this experiment. Corrosion of the Ni substrate was dynamically and thermodynamically inhibited in the electrochemical formation processes of Mg-Ni alloys. However, there was a small amount of MgO in the Mg-Ni alloys, and corrosion of the Ni sheet showed obvious effects on the morphology of Mg-Ni alloys
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）