Article
Materials Science, Multidisciplinary
Xin Du, Shaoqiang Guo, Sheng Wang
Summary: This study investigates the embrittlement of nickel alloys caused by fission product tellurium in nuclear molten fuel salt systems. The reduction reactions of tellurium and the electrochemical formation of nickel tellurides have been identified. The study suggests the critical potential for mitigating tellurium embrittlement using the redox control technique.
Article
Electrochemistry
Liam Witteman, Kerry Rippy, Patrick Taylor, Judith Vidal
Summary: This study investigates the electrochemical behavior of MgOH+ reduction on a tungsten cathode in molten chloride salt. The formation of MgOH+ within the salt leads to corrosion, which is a major barrier to the use of chloride salts in various applications. Although pre-purification methods exist, continuous purification during plant operation is necessary. Therefore, this study aims to assess the scalability of continuous electrochemical purification using a Mg anode and W cathode.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Analytical
Yongjian Zhang, Boqing Cai, Xu Wang, Ruixiang Wang, Zhongning Shi
Summary: The electrochemical behavior of Yb3+ ions was investigated in a (LiF-YbF3)eut-Yb2O3 molten salt system, and it was found that Yb3+ ions undergo two quasi-reversible processes on W and Ni cathodes. The addition of Yb2O3 improves the electrochemical activity of Yb3+. The crystallization of Yb3+ ions occurs through three-dimensional instantaneous and continuous nucleation on W and Ni electrodes, respectively. The reduction activity of Yb2+ ions on the Ni cathode is stronger, which enables the preparation of the Ni2Yb alloy.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Electrochemistry
V. A. Volkovich, A. A. Ryzhov, A. B. Ivanov, A. V. Shchetinskiy, D. S. Maltsev
Summary: The reaction between oxygen and neodymium chloride in high-temperature molten salt was studied in this research, focusing on determining the kinetic parameters such as reaction rates, rate constants, and activation energy. Factors such as the amount of oxygen, temperature, and gas phase composition were considered for their impact on the reaction process.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Review
Electrochemistry
Nicole Hege, Jessica Jackson, Jenifer Shafer
Summary: Uranium is a critical element for nuclear energy production, particularly in advanced reactor designs like molten salt reactors. This review discusses research on the coordination chemistry and behavior of uranium with coolants and pyroprocessing salts, which are proposed for future reactor designs. Topics include the reduction and oxidation reactions of U(III) and the insights gained from techniques such as cyclic voltammetry and spectroscopy. The importance of unifying studies and utilizing synchrotron radiation research and multimodal approaches is also emphasized.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Analytical
Chan Mi Kim, Sung Pil Yoon, Sung Ki Cho
Summary: A new method was developed in this study to determine the diffusion coefficient of electroactive species in high temperature molten salt without knowledge of their concentration, utilizing cyclic voltammetry at a simple unshielded microwire electrode. Experimental verification of D determination in molten salt was successfully conducted with Eu3+ and O22-, showing similar values to reported values. However, accurate determination is limited for quasi-reversible and totally irreversible reactions due to overestimation of D.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Electrochemistry
Jiaqi Sun, Zeng Chen, Wenjuan Xiong, Meiyue Liu, Putao Zhang, Haoyu Huang, Fuhao Sun, Yiming Chen, Shengjun Li
Summary: The study focused on preparing the Co-Sn alloys through electro-deoxidation, controlling the phase compositions of the alloys by adjusting the molar ratio and molten salt temperature, and testing their performance as anode materials for lithium-ion batteries, showing promising energy storage capacities.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Electrochemistry
Subir Kumar Ghosh, Jalaj Varshney, Ashutosh Srivastava, Charu Srivastava
Summary: A thick and nonporous metallic molybdenum coating was successfully obtained on copper and 316L stainless steel substrates using molten salt electrolysis. Analysis revealed that the presence of potassium fluoride and sodium tetraborate was necessary for the cathodic discharge of MoO4-2 to Mo, with higher temperatures favoring cathodic deposition. X-ray diffraction confirmed the deposition of single phase body centered cubic Mo.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Electrochemistry
Na Li, Yaru Peng, Zeng Chen, Wenjuan Xiong, Jiaqi Sun, Yiming Chen, Putao Zhang, Meiyue Liu, Shengjun Li
Summary: The electro-deoxidation of MgO for Mg-Zr alloy formation in CaCl2-NaCl molten salt was studied in this experiment. The addition of PVB promoted the electro-deoxidation of MgO. By adjusting the concentration of PVB and the ratio between MgO and ZrO2, the efficiency of electro-deoxidation of MgO and ZrO2 can be controlled.
ELECTROCHIMICA ACTA
(2021)
Article
Engineering, Chemical
Sepideh Niazi, Espen Olsen, Heidi S. Nygard
Summary: This study investigated the use of electrodeposition to remove impurities from molten salt. The results showed that Cu and Fe(III) can be completely removed in a relatively short time, but the removal of Fe(II) and Mn was less effective with some impurities remaining.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Sung-Wook Cho, Jeong-Hyun Yu
Summary: This study investigated the preparation of neodymium metal by molten salt electrowinning and studied the effects of electrowinning temperature, cathodic current density, and feeding rate of raw material on the current efficiency. The most suitable electrowinning temperature was found to be 1040 to 1050 degrees C, and the current efficiency increased with higher cathodic current density.
KOREAN JOURNAL OF METALS AND MATERIALS
(2022)
Article
Metallurgy & Metallurgical Engineering
Ai-min Liu, Yu Yao, Meng-xia Guo, Yu-bao Liu, Zhong-ning Shi, Feng-guo Liu, Xian-wei Hu, Wen-cai He, Zhao-wen Wang
Summary: The electrochemical mechanism and electrodeposition of neodymium from the DMI-LiNO3 solvated ionic liquid were investigated, showing that the electrochemical reduction is irreversible and proceeds via one-step with three-electron transfer. The electrodeposit obtained was confirmed to contain metallic neodymium.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Chemistry, Applied
A. K. Rivas-Sanchez, D. S. Guzman-Hernandez, M. T. Ramirez-Silva, M. Romero-Romo, M. Palomar-Pardave
Summary: This study reports the acidity constant values of four anthraquinones in aqueous media for the first time, and presents their application in electrochemical quantification and UV-Vis spectrophotometry when forming inclusion complexes with 2-hydroxy-propyl-beta-cyclodextrin. Cyclic voltammetry showed higher sensitivity and wider linear range for quinizarin detection and quantification compared to spectrophotometry, also demonstrating an advantage in the presence of interferents.
Article
Chemistry, Multidisciplinary
Lev Bromberg, Michael P. Nitzsche, T. Alan Hatton
Summary: A family of blended compositions of molten mixed lithium and sodium borate (Li1.5Na1.5BO3) and eutectic lithium-potassium carbonate (Li1.24K0.76CO3) salts has been introduced as reversible carbon dioxide absorbents and as media for CO2 electrolysis for carbon conversion. The blended borate-carbonate compositions have adjustable viscosity and can withstand cyclic temperature and CO2 pressure swings. Addition of eutectic carbonate lowers overall CO2 uptake but enables faster cycling. Blended borate/carbonate compositions with 50-60% borate content possess high loading capacity for CO2 and enable maximum carbon product yield.
Article
Electrochemistry
Nathan D. Smith, Stephen Lombardo, Shun-Li Shang, Zi-Kui Liu, Hojong Kim
Summary: The kinetic properties of Ni(II) in FLiNaK molten salt were investigated using various electrochemical techniques. The reduction of Ni(II) to Ni(s) was found to be a single step, two-electron transfer process. Diffusivity values were calculated using different equations and methodologies, with a range of 3.27 x 10(-7)-3.04 x 10(-6) cm(2) s(-1) and an activation energy of 62-104 kJ mol(-1). The variations in the estimated kinetic properties may be attributed to the assumptions made in the theoretical models regarding reversibility and unit activity during Ni metal deposition.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
S. G. Booth, A. Uehara, S. -Y. Chang, C. La Fontaine, T. Fujii, Y. Okamoto, T. Imai, S. L. M. Schroeder, R. A. W. Dryfe
Article
Engineering, Environmental
Koichiro Takao, Takahiro Mori, Mayuu Kubo, Akihiro Uehara, Yasuhisa Ikeda
JOURNAL OF HAZARDOUS MATERIALS
(2019)
Article
Nuclear Science & Technology
Shoji Nakamura, Kazushi Terada, Atsushi Kimura, Taro Nakao, Osamu Iwamoto, Hideo Harada, Akihiro Uehara, Koichi Takamiya, Toshiyuki Fujii
JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
(2019)
Article
Chemistry, Physical
Shino Homma-Takeda, Akihiro Uehara, Takanori Yoshida, Chiya Numako, Oki Sekizawa, Kiyofumi Nitta, Nobuaki Sato
RADIATION PHYSICS AND CHEMISTRY
(2020)
Article
Nuclear Science & Technology
Shoji Nakamura, Fumito Kitatani, Atsushi Kimura, Akihiro Uehara, Toshiyuki Fujii
JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
(2019)
Article
Materials Science, Multidisciplinary
Daisuke Akiyama, Hidenori Akiyama, Akihiro Uehara, Akira Kirishima, Nobuaki Sato
JOURNAL OF NUCLEAR MATERIALS
(2019)
Editorial Material
Nuclear Science & Technology
Akihiro Uehara, Koichiro Takao
JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
(2019)
Article
Nuclear Science & Technology
Shoji Nakamura, Yuji Shibahara, Atsushi Kimura, Osamu Iwamoto, Akihiro Uehara, Toshiyuki Fujii
JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
(2020)
Article
Chemistry, Analytical
Yuji Shibahara, Shoji Nakamura, Akihiro Uehara, Toshiyuki Fujii, Satoshi Fukutani, Atsushi Kimura, Osamu Iwamoto
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2020)
Article
Geochemistry & Geophysics
Akihiro Uehara, Masakazu Oikawa, Izumi Tanaka, Hiroshi Ishihara, Shino Homma-Takeda
Summary: In this study, simple methods for determination of elements in biological fluids were developed and applied to quantify uranium concentrations in urine in a rat model. The results showed successful condensation and homogeneous distribution of uranium in the specimen using PFA coating, with consistent results compared to inductively coupled plasma mass spectrometry.
Article
Geochemistry & Geophysics
Shino Homma-Takeda, Hitomi Fujishiro, Izumi Tanaka, Haruko Yakumaru, Kyoko Ayama, Akihiro Uehara, Masakazu Oikawa, Seiichiro Himeno, Hiroshi Ishihara
Summary: This study investigated the intracellular distribution of uranium in S3 cells using microbeam-based elemental analysis, revealing that uranium is mainly distributed inside the cell and localized in the cytoplasm near the cell nucleus. Furthermore, uranium was found to colocalize with phosphorus and potassium in some cells. The average uranium content in S3 cells was estimated to be hundreds of femtograms per cell.
Article
Materials Science, Multidisciplinary
Akihiro Uehara, Daisuke Akiyama, Atsushi Ikeda-Ohno, Chiya Numako, Yasuko Terada, Kiyofumi Nitta, Toshiaki Ina, Shino Takeda-Homma, Akira Kirishima, Nobuaki Sato
Summary: This study characterizes the fuel debris at Fukushima Daiichi Nuclear Power Station and investigates the reaction mechanisms and composition of reaction products for mixed UO2-ZrO2 compounds under different atmospheres. The findings provide insights into the interaction between nuclear fuels and cladding materials, which can facilitate the simulation of decontamination procedures.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Toshiyuki Fujii, Chizu Kato, Naoya Wada, Akihiro Uehara, Paolo Sossi, Frederic Moynier
Summary: The application of stable isotopes of vanadium (V) to trace geological and biological processes is a growing field. Vanadium can exist in different forms and can be used to trace its exchange between phases. Theoretical calculations and laboratory experiments were conducted to understand the isotope fractionation of vanadium in organic and aqueous phases. The results showed that the theoretical calculations matched well with the experimental data, providing a basis for interpreting natural variations of vanadium isotopes.
ACS EARTH AND SPACE CHEMISTRY
(2023)
Article
Chemistry, Analytical
Akihiro Uehara, Daiju Matsumura, Takuya Tsuji, Haruko Yakumaru, Izumi Tanaka, Ayumi Shiro, Hiroyuki Saitoh, Hiroshi Ishihara, Shino Homma-Takeda
Summary: This study measured uranium chemical forms in serum in the presence and absence of chelating agents using X-ray absorption spectroscopy and evaluated the percentages of uranium-chelating agents and uranium-bioligands based on principal component analysis of XAS spectra. The main ligands forming complexes with uranium in the serum were found to be IP6 > EHBP > bioligands > DFO >> DTPA when the concentration ratio of the chelating agent to uranium was 10.
ANALYTICAL METHODS
(2022)
Article
Electrochemistry
Samuel G. Booth, Sin-Yuen Chang, Akihiro Uehara, Camille La Fontaine, Giannantonio Cibin, Sven L. M. Schroeder, Robert A. W. Dryfe
ELECTROCHIMICA ACTA
(2017)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)