Article
Chemistry, Multidisciplinary
Song Wang, Zili Wu, Sheng Dai, De-en Jiang
Summary: A deep-learning approach has been proposed to accelerate the determination of hydride locations in metal nanoclusters, overcoming the challenges of utilizing neutron crystallography. The method demonstrates efficiency in predicting hydride locations in copper nanoclusters and has the potential to be applied to other metal systems.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
D. Pukazhselvan, K. S. Sandhya, Narendar Nasani, Duncan Paul Fagg
Summary: This study shows that the dehydrogenation activation energy of MgH2 can be lowered by incorporating ceria, but the ceria undergoes phase transformations during dehydrogenation. It also suggests that reduced cerium oxide phases may be mistaken as cerium hydrides, therefore the belief in CeH2 as an active catalyst in the MgH2/CeO2 hydrogen storage system needs further scrutiny.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Yifei Zhang, Joakim Brorsson, Takashi Kamiyama, Takashi Saito, Paul Erhart, Anders E. C. Palmqvist
Summary: This study investigates the chemical ordering in quaternary clathrates Ba8AlxGa16-xGe30, revealing differences in site occupancy factors of trivalent elements and atomic displacement patterns of Ba atoms based on synthesis methods. The research demonstrates key relationships between chemical ordering and structural properties, providing new insights for designing and optimizing thermoelectric materials.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Xin F. Tan, Manjin Kim, Qinfen Gu, Julio Pinzon Piraquive, Guang Zeng, Stuart D. McDonald, Kazuhiro Nogita
Summary: This study investigates the effects of Na in hypo-eutectic Mg-lwt.%Si alloys for H-2 storage applications. The addition of trace amounts of Na is vital in improving the H-2 sorption kinetics, achieving a high storage capacity. The study also analyzes the hydrogen sorption mechanisms and identifies the role of Na in facilitating hydrogen diffusion.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Xiaoyue Zhang, Yahui Sun, Guanglin Xia, Xuebin Yu
Summary: Light-weight solid-state hydrogen storage materials, such as metal hydrides and complex hydrides, have great application potential due to their high hydrogen storage densities. Neutron scattering techniques have become powerful tools for characterizing the hydrogen storage mechanism of these materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
K. Itoh, J. Saida, E. R. Barney, A. C. Hannon
Summary: The occupation of interatomic hole sites by deuterium in a deuterated Ni67Zr33 amorphous alloy was investigated using diffraction measurements and simulation techniques. The results show that deuterium atoms occupy various types of polyhedral hole sites, as well as tetrahedral ones. The occupation of different hole sites has different effects on the volume of the material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Neslihan Aslan, Goekhan Gizer, Claudio Pistidda, Martin Dornheim, Martin Mueller, Sebastian Busch, Wiebke Lohstroh
Summary: The addition of LiBH4 to form Li4(BH4)(NH2)3 significantly improves the hydrogen storage performance of reactive hydride composite Mg(NH2)2+2LiH. The study reveals localized rotational motions in Li4(BH4)(NH2)3 at temperatures below 514 K, and the activation energy for the rotational motion is determined through QENS measurements.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Multidisciplinary Sciences
Stephen K. Wilke, Oliver L. G. Alderman, Chris J. Benmore, Jorg Neuefeind, Richard Weber
Summary: Rare-earth titanate glasses are fragile liquids with useful optical properties. The atomic structure of 83TiO(2)-17Nd(2)O(3) glass was investigated using X-ray and neutron diffraction, revealing a unique structure with Ti-O coordination predominantly in octahedral coordination.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Jiaxin Gong, Jiheng Li, Xiaoqian Bao, Ruifen Hou, Xuexu Gao
Summary: The crystal structure and magnetic structure of Tb-Dy-Fe compounds were studied before and after annealing heat treatment, revealing the existence of tetragonal and rhombohedral phases at room temperature. The volume proportion of the hexagonal phase increased after heat treatment, and the effect of structural distortion on the magnetostriction of Tb-Dy-Fe was discussed based on analytical results.
Article
Chemistry, Inorganic & Nuclear
Oleksandr Dolotko, Takeshi Kobayashi, Ihor Z. Hlova, Shalabh Gupta, Vitalij K. Pecharsky
Summary: The newly synthesized LiAl(BH4)(2)Cl-2 features a unique 3D framework, with hydrogen evolution starting at 70 degrees Celsius and suppression of diborane formation.
Article
Chemistry, Inorganic & Nuclear
Georgia M. Richardson, Jesse Howarth, Matthew J. Evans, Alison J. Edwards, Scott A. Cameron, Mathew David Anker
Summary: Cyclopentadienyl ligands are commonly used to stabilize low-valent lanthanide(II) complexes, and in this study, the reactions of beta-diketiminate ytterbium(II) hydride with various compounds were reported. The resulting heteroleptic ytterbium(II) cyclopentadienides were characterized and found to exist as mononuclear species in both solution and solid state, with the ytterbium(II) center retaining its oxidation state.
JOURNAL OF COORDINATION CHEMISTRY
(2022)
Review
Chemistry, Multidisciplinary
Stipe Lukin, Luzia S. Germann, Tomislav Friscic, Ivan Halasz
Summary: In the past two decades, mechanochemistry has experienced rapid development and has been applied to various areas of chemical and materials synthesis. The recent introduction of real-time in situ monitoring techniques has revolutionized the study of mechanochemical reactions, leading to significant advancements in understanding reaction mechanisms and identifying new molecules and materials that were previously unknown.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Chemistry, Physical
Katharina Dorn, Bjoern Blaschkowski, Heiko Bamberger, Joris van Slageren, Marc Widenmeyer, Anke Weidenkaff, Emmanuelle Suard, Ingo Hartenbach
Summary: The derivatives of the Li1-xRE5+xW8O32 series (RE = Dy-Lu) crystallize in the monoclinic system with C-center symmetry. These compounds exhibit a mixed occupation of Li+ and RE3+ cations in their crystal structures, with a deficiency of lithium leading to an excess of positive charges in the formula.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Kenji Iwase, Shuhei Ishida, Takashi Ueno, Kazuhiro Mori
Summary: This study investigated the residual hydrogen occupation mechanisms in MgZn2-type and CaCu5-type cells during the hydrogen absorption-desorption process. The results revealed the structural changes and deuterium occupation in NdNi3Dx and provided insights into the preferred deuterium sites in different cell types.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Lars J. Bannenberg, Herman Schreuders, Nathan van Beugen, Christy Kinane, Stephen Hall, Bernard Dam
Summary: In the future hydrogen economy, accurate, cost-efficient, and safe hydrogen sensors based on metal hydrides will be important. Alloying can tune the properties of hydrogen-sensing materials, as demonstrated by thin films of tantalum doped with ruthenium. The alloying effects include modifying the enthalpy of hydrogenation, shifting the pressure window for hydrogen absorption, and reducing the amount of hydrogen absorbed by the material, allowing for tunable sensitivity and a wide sensing range.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Rama Srinivas Varanasi, Motomichi Koyama, Hiroyuki Saitoh, Reina Utsumi, Toyoto Sato, Shin-ichi Orimo, Eiji Akiyama
Summary: The phase transformations and microstructure changes during the depressurization of non-hydrogenated and hydrogenated Fe-Mn-Si-Cr alloy were investigated. Understanding the effects of hydrogenation on the stability of the austenite phase in Fe-based alloys is crucial.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Erika Michela Dematteis, Jussara Barale, Giovanni Capurso, Stefano Deledda, Magnus H. Sorby, Fermin Cuevas, Michel Latroche, Marcello Baricco
Summary: Hydrogen, an efficient energy carrier produced from renewable sources, plays a vital role in the transition towards CO2-free energy. This study focuses on Ti-rich Ti(Fe,Mn)0.90 alloys and their deuterides, determining their crystal structure and analyzing the influence of Mn substitution on structural properties during reversible deuterium loading. The research provides valuable insights into hydrogen storage, structural knowledge, and the application of TiFe-type alloys in integrated hydrogen tank for energy storage systems.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Biochemistry & Molecular Biology
Toyoto Sato, Hiroyuki Saitoh, Reina Utsumi, Junya Ito, Yuki Nakahira, Kazuki Obana, Shigeyuki Takagi, Shin-ichi Orimo
Summary: In this study, the hydrogen absorption reaction of LaNi5 under high pressures above 1 GPa was investigated, and it was found that LaNi5 absorbed 2.07% hydrogen at 6 GPa, indicating a higher hydrogen storage capacity compared to reactions below 1.0 MPa. Additionally, the hydrogen-absorbed LaNi5Hx decomposed into NiH under high-pressure conditions, and a new hydride phase with different crystal parameters was observed.
Article
Green & Sustainable Science & Technology
Cathrine Kyung Won Solem, Stefano Deledda, Gabriella Tranell, Ragnhild E. Aune
Summary: Up to 10% of metallic aluminum production is lost due to dross formation, causing environmental issues and toxic gas generation. A sampling procedure for collecting representative dross samples and a methodology for analyzing and evaluating the results have been developed. XRD analysis and cryomilling proved effective in analyzing the dross samples, revealing the influence of sampling location and particle size fraction on dross characteristics. This research provides insights for minimizing aluminum loss from dross formation.
JOURNAL OF SUSTAINABLE METALLURGY
(2023)
Article
Chemistry, Physical
Sruthy Balakrishnan, Terry D. Humphries, Mark Paskevicius, Craig E. Buckley
Summary: Calcium hydride has shown potential as a hydrogen storage and thermochemical energy storage material, but its high operating temperature has limited its application and research on its hydrogen sorption thermodynamics. This study provides experimental data on the thermodynamic properties and activation energy of CaH2 in both solid and molten states, filling the gap in the thermodynamics of the Ca-H system for the first time in over 60 years.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Ryuhei Sato, Kazuto Akagi, Shigeyuki Takagi, Kartik Sau, Kazuaki Kisu, Hao Li, Shin-ichi Orimo
Summary: Topological data analysis based on persistent homology is applied to the molecular dynamics simulation of the AgI a-phase to analyze the ion migration mechanism effectively. The persistence diagrams of a-AgI record the shape and size of the ring structures in the atomic configurations, clearly showing the emergence of four-membered rings formed by two Ag and two I ions at high temperatures, which are common structures during the Ag ion migration. The potential energy change due to the deformation of the four-membered ring agrees well with the activation energy calculated from the conductivity Arrhenius plot, and the concerted motion of two Ag ions via the four-membered ring is successfully extracted from molecular dynamics simulations, providing new insight into the specific mechanism of the concerted motion.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Kazutaka Ikeda, Takuya Kimura, Koji Ohara, Toyoto Sato, Hidetoshi Ohshita, Atsushi Sakuda, Akitoshi Hayashi
Summary: Sodium solid electrolytes are considered preferable to lithium solid electrolytes for all-solid-state lithium-ion batteries. The heat treatment of Na3PS4 glass ceramics can greatly enhance the ionic conductivity, with vacancies in the ceramic material playing a crucial role in promoting Na ion conduction. The control of vacancies in solid electrolytes is essential for the design of practical all-solid-state sodium batteries.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Kazuaki Kisu, Rana Mohtadi, Shin-i. Orimo
Summary: Rechargeable Ca metal batteries have advantageous features for potential alternatives to Li-ion batteries, such as high energy density, cost-effectiveness, and natural elemental abundance. However, challenges in passivating Ca metal by electrolytes and a lack of efficient cathode materials with Ca2+ storage capabilities hinder the development of practical Ca metal batteries. In this study, the feasibility of using a CuS cathode and a tailored electrolyte for Ca metal batteries is confirmed, leading to a Ca metal battery with long cycle life and high capacity retention. This study can expedite the development of Ca metal batteries.
Article
Materials Science, Multidisciplinary
Kartik Sau, Shigeyuki Takagi, Tamio Ikeshoji, Kazuaki Kisu, Ryuhei Sato, Shin-ichi Orimo
Summary: Using molecular dynamics (MD) simulations, we investigated the effect of cation size on the ordered-disordered phase-transition temperature (T-tran) and cationic diffusion in the complex hydride LiCB11H12. The results showed that introducing a large-size cation with high cell volume can lower T-tran by facilitating anionic rotation. The study also provided insights into cationic density distribution, bottlenecks in the cationic path, and the hopping mechanism with increasing cationic sizes.
MATERIALS ADVANCES
(2023)
Article
Chemistry, Inorganic & Nuclear
Aleksandra Mielewczyk-Gryn, Shuhao Yang, Maria Balaguer, Ragnar Strandbakke, Magnus H. Sorby, Iga Szpunar, Agnieszka Witkowska, Sebastian Wachowski, Jose M. Serra, Alexandra Navrotsky, Maria Gazda
Summary: This study investigates the formation energetics and stability of BaLnCo(2)O(6-delta) (Ln = La, Pr, Nd, and Gd) (BLnC) and BaGd1-xLaxCo2O6-delta, where x = 0.2, 0.5, and 0.7 (BGLC) double perovskite cobaltites under high water partial pressure. These materials have potential applications in electrochemical devices as positrodes. It is found that all investigated materials are thermodynamically stable relative to binary oxides and exhibit exothermic enthalpies of formation. The BGLC compounds show higher negative formation enthalpies compared to single-Ln compositions, but the BLnC series demonstrate better chemical stability under high steam pressures.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Kyran Williamson, Kasper T. T. Moller, Anita M. M. D'Angelo, Terry D. D. Humphries, Mark Paskevicius, Craig E. E. Buckley
Summary: This study introduces a new reactive carbonate composite (RCC) that uses Fe2O3 to destabilize BaCO3 and reduce its decomposition temperature, making it more suitable for thermal energy storage. The RCC demonstrates promising potential for next-generation thermal energy storage due to its low cost and high energy density. The thermodynamic parameters for the reversible CO2 reactions were determined and found to be significant for the RCC.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Lucie Desage, Terry D. Humphries, Mark Paskevicius, Craig. E. Buckley
Summary: Thermochemical energy storage has the potential to enable large-scale storage of renewable energy by integrating with power production facilities. The use of metal hydrides, particularly calcium hydride with the addition of aluminium, allows for lower operating temperatures and excellent working conditions for thermal energy storage.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Chemistry, Physical
Thomas A. Hales, Kasper T. Moller, Terry D. Humphries, Anita M. D'Angelo, Craig E. Buckley, Mark Paskevicius
Summary: Metal substituted dodecaborate anions coupled with alkali metal cations show promise as solid-state ion conductors for batteries. Substituting a B-H unit in an unsubstituted dodecaborate cage with a tin atom produces a stable and polar divalent anion, resulting in improved ion conductivity. Li2B11H11Sn exhibits high ion conductivity at 130 degrees C, similar to LiCB11H12, but achieving high ion conductivity at room temperature is challenging.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
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)
