Article
Chemistry, Physical
Jing Wen, Laetitia Laversenne, Marc Novelli, Thierry Grosdidier, Patricia de Rango
Summary: Efficient, simple, and safe processes like room temperature forging are required for the development of hydrogen storage in metal hydrides. Samples made from Mg and Ni powders through this method show only Mg and Ni phases. Deuterium absorption occurs at temperatures as low as 250 degrees C due to basal fiber texture and structural defects induced by forging. Deuterium-induced mobility of metal atoms is evidenced by the absence of Mg and Ni reaction in the absence of deuterium even after annealing.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Magda Peska, Katarzyna Smektalska, Julita Dworecka-Wojcik, Sylwia Terlicka, Wladyslaw Gasior, Wojciech Gierlotka, Adam Debski, Marek Polanski
Summary: This study presents a systematic investigation of the interactions between hydrogen and Mg-Ag alloys prepared by mechanical alloying. The alloys were found to be effectively synthesized with mechanical alloying, extending solubility limits compared to known phase diagrams. Further annealing enhanced synthesis to obtain well crystallized samples that could absorb significant amounts of hydrogen. Magnesium hydride and AgMg intermetallics were formed as residual products that did not react with hydrogen under the chosen conditions. Samples characterized directly after ball milling showed higher reaction kinetics with hydrogen.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Volodymyr A. Yartys, Colin J. Webb, Fermin Cuevas
Summary: The paper provides an overview of advanced in situ diffraction studies for probing the structure and reacting mechanisms of hydrogen and energy storage materials. These studies utilize high flux diffraction beam and high resolution measurements to establish the mechanism of phase-structural transformations and their kinetics. Various conditions, such as hydrogen/deuterium pressures and temperatures, as well as different charge-discharge states, are considered. The paper also highlights the contributions of Dr. Michel Latroche and summarises a long-standing collaboration between the co-authors in the field.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Hector C. Mandujano, Melaku Sisay Tafere, Naveen Kumar Chogondahalli Muniraju, Tielyr D. Creason, Timothy M. McWhorter, Krzysztof Gofryk, Thomas W. Heitmann, Qiang Zhang, Bayram Saparov, Harikrishnan S. Nair
Summary: In this work, the Mn2SiX4 olivines (X=S, Se) were studied using magnetic susceptibility, X-ray and neutron diffraction. The crystal structures of Mn2SiS4 and Mn2SiSe4 were determined using synchrotron X-ray, neutron diffraction, and X-ray total scattering data. It was found that the Mn triangle forming the sawtooth lattice is isosceles in both compounds. The temperature evolution of magnetic susceptibility showed anomalies below 83 K and 70 K for Mn2SiS4 and Mn2SiSe4, respectively, indicating the presence of magnetic ordering. Neutron diffraction measurements revealed that the magnetic space groups of Mn2SiS4 and Mn2SiSe4 are Pnma and Pnm ' a ', respectively.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Zhiwen Wu, Haitao Yang, Lirong Wu, Chaoquan Hu, Wengui Gao, Lingyun Huang, Lei Li
Summary: Pressure hydrogen reduction (Pre-H-2) is a key technology in hydrometallurgy, particularly in the 5G era. This paper outlines the thermodynamic and kinetic principles of Pre-H-2 in a liquid-phase environment, as well as the impact of liquid additives on process quality. Feasibility guidance for process improvement is provided.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Ryan A. Klein, Rafael Balderas-Xicohtencatl, Jan Petter Maehlen, Terrence J. Udovic, Craig M. Brown, Robert Delaplane, Yongqiang Cheng, Roman Denys, Anibal J. Ramirez-Cuesta, Volodymyr A. Yartys
Summary: Intermetallic metal hydrides are essential for hydrogen storage, but those with higher storage capacities are still needed. Neutron vibrational spectroscopy (NVS) was used to study LaNiInHx and CeNiInH1.4, revealing close vibrational features between paired H atoms when x > 0.67. In contrast, no close H contacts were found in CeNiSnH, CeNiSnH2, and CeNiSnD2, demonstrating differences in hydrogen dynamics between the compounds.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Erika P. Ramos, J. David Bazak, Abdeljalil Assoud, Ashfia Huq, Gillian Goward, Linda F. Nazar
Summary: In this study, a new lithium-ion conductor material Li3.3Al0.15P0.85S4 belonging to the thio-LISICON family was synthesized and characterized. It exhibits good ionic conductivity and diffusivity. The crystal structure, as well as the influence of macroscopic and microscopic morphology on ion transport, was investigated using various experimental techniques.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Fevzi Kelen
Summary: In this study, AZ91D magnesium alloy was successfully produced by reinforcing with a combination of Ti and Ni microparticles for the first time. The optimized fabrication parameters resulted in nearly full density and pore-free microstructure. The hybrid composites showed enhanced mechanical properties and could easily meet the temperatures and stresses that automobile components are exposed to under service conditions. The low-density values of the produced hybrid composites make them a significant alternative to conventional materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Matilde Saura-Muzquiz, Maxim Avdeev, Helen E. A. Brand, Brendan J. Kennedy
Summary: The structures and magnetic properties of Os4+ (5d4) halides are described, and the crystal structures and thermal stability of different compounds are studied. The experimental results show that these compounds exhibit unique magnetic behavior with a weak magnetic ground state.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Yusuke Onuki, Kasumi Masaoka, Shigeo Sato
Summary: The texture and microstructure formation of a Ca-added alloy, AZX612, during uniaxial tensile deformation at elevated temperatures is reported. The total elongation increases with temperature primarily due to prolonged unstable plastic deformation. The significant elongation at high temperatures is attributable to the relaxation of strain concentration via continuous dynamic recrystallization.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Mikhail A. Kuzovnikov, Vladimir E. Antonov, Thomas Hansen, Alexandre S. Ivanov, Alexander Kolesnikov, Valery Kulakov, Vitaly D. Muzalevsky, Stanislav Savvin, Marek Tkacz
Summary: Three hydrides - PdHx, MoHx, and TiHx - exhibit an inverse isotope effect in superconductivity, where the phase with a heavier hydrogen isotope, deuterium, has a higher critical temperature. The origin of this effect is not yet certain, but the commonly accepted explanation points to the strong anharmonicity of optical hydrogen vibrations.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Mikhail A. Kuzovnikov, Vladimir E. Antonov, Alexandre S. Ivanov, Thomas Hansen, Stanislav Savvin, Valery I. Kulakov, Marek Tkacz, Alexander I. Kolesnikov
Summary: The powder samples of TaH0.89 and TaD0.96 were synthesized under high pressure and temperature conditions, and the neutron diffraction and inelastic neutron scattering studies show that hydrogen and deuterium atoms occupy the crystal structure in different ordering scenarios, forming layered superstructures with long periodicity. The inelastic neutron scattering study also reveals a noticeable soft anharmonicity of the potential well for H and D atoms.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Metallurgy & Metallurgical Engineering
Shuhui Lv, Qiang Yang, Fanzhi Meng, Jian Meng
Summary: This study investigates the instantaneous reactions of Al, Mn, Zn, Zr, and Y with Ni to understand their mechanisms in removing Ni impurity. The results reveal the formation of Al4NiY and Al4Ni(Y,Zr) intermetallic phases, which efficiently remove Ni and settle at the bottom of the melt. Adding Y to Mg-Al based alloys also contributes to the removal of Fe and Ni, improving the alloys' corrosion resistance and strength.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Hu Yao, Guang Zeng, Qinfen Gu, Kazuhiro Nogita, Jing Guo, Qian Li
Summary: The influences of microstructure evolution induced by thermal-mechanical processing on the hydrogen storage performance of Mg-Ni-Gd-Y-Zn-Cu alloys were investigated. The extruded alloy showed higher hydrogen absorption capacity and faster hydrogen ab/desorption kinetics due to refined alpha-Mg grains and the presence of 14H-type LPSO phases. These findings have implications for the design and manufacturing of magnesium-based hydrogen storage materials.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
ChuBin Wan, R. V. Denys, V. A. Yartys
Summary: The study focused on phase-structural transformations in La3-xMgxNi9 alloys as negative electrode materials in Ni/MH batteries. In situ neutron powder diffraction was used to probe phase equilibria and transformations at temperatures from 300 K to 1273 K. The alloys were found to be multi-phase structured and underwent various transformations with increasing temperature and holding time.
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
(2021)
Article
Chemistry, Physical
V. V. Berezovets, R. Denys, I. Yu Zavaliy, Yu Kosarchyn
Summary: MgH2-based nanocomposites were synthesized using reactive ball milling and various catalytic additives. The additives improved the hydrogen absorption-desorption kinetics and stability of the composites. Nano-Ti showed the most stable hydrogen absorption-desorption characteristics compared to TiO2 and Ti4Fe2Ox additives.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Vladimir E. Antonov, Vladimir K. Fedotov, Alexandre S. Ivanov, Alexander Kolesnikov, Mikhail A. Kuzovnikov, Marek Tkacz, Volodymyr A. Yartys
Summary: Inelastic neutron scattering is an effective tool for studying optical vibrations of hydrogen atoms in metal hydrides. This review focuses on binary hydrides of 3d- and 4d-metals, providing spectral and temperature dependency data and discussing the interaction between metal and hydrogen.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Boris P. Tarasov, Artem A. Arbuzov, Alexey A. Volodin, Pavel Fursikov, Sergey A. Mozhzhuhin, Mykhaylo Lototskyy, Volodymyr A. Yartys
Summary: The paper reviews the authors' studies on advanced functional composites of graphene based materials with metals, alloys, intermetallic compounds and their hydrides, and their application in creating hydrogen-storage materials, electrode materials, and highly efficient catalysts. These materials are integrated into hydrogen energy systems for backup electric power and hydrogen-based energy storage.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
A. Kytsya, V Berezovets, Yu Verbovytskyy, L. Bazylyak, V Kordan, I Zavaliy, V. A. Yartys
Summary: In this study, Ni-Co bimetallic nanoparticles were successfully synthesized, and the effects of different Ni contents on particle size and polydispersity were observed. Ni50Co50 showed the highest catalytic activity for the hydrolysis of alkaline NaBH4 solutions. The kinetic studies revealed that the hydrolysis rate increased with higher NaBH4 concentration and decreased with higher pH value of the solution. The activation energy of the reaction decreased with decreasing NaBH4 and catalyst contents.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Liuzhang Ouyang, Mili Liu, Kang Chen, Jiangwen Liu, Hui Wang, Min Zhu, Volodymyr Yartys
Summary: Economic hydrogen production is a key issue for the application of hydrogen as an energy carrier. The spontaneous hydrolysis reaction of light metal-based materials offers a promising method for safe storage and effective supply of hydrogen. However, sluggish hydrogen kinetics and low yield hinder its large-scale application. Low-cost regeneration of materials is essential for hydrogen generation via hydrolysis.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Electrochemistry
Nazia S. Nazer, Markus Strobl, Anders Kaestner, Preben J. S. Vie, Volodymyr A. Yartys
Summary: In this study, an operando neutron imaging technique was used to investigate a commercial Li-ion battery, providing insights into its structural and functional details during charge and discharge processes. Offline tomographic scans also revealed the structural heterogeneity within the battery.
ELECTROCHIMICA ACTA
(2022)
Article
Materials Science, Multidisciplinary
Volodymyr A. Yartys, Vasyl V. Berezovets, Ponniah Vajeeston, Lev G. Akselrud, Vladimir Antonov, Vladimir Fedotov, Steffen Klenner, Rainer Poettgen, Dmitry Chernyshov, Michael Heere, Anatoliy Senyshyn, Roman V. Denys, Ladislav Havela
Summary: Understanding the relationship between the structure, composition, and hydrogenation properties of intermetallic hydrides is crucial for improving their hydrogen storage performance. The ability to form hydrides and control their interaction with hydrogen is determined by their chemical composition. This study investigated a ScNiSn-based intermetallic hydride using various experimental techniques, including synchrotron and neutron powder diffraction, Mössbauer spectroscopy, hydrogenation, and thermal desorption spectroscopy. Computational calculations were also performed. The study revealed the mechanism of phase-structural transformation and the formation of unique metal-hydrogen bonding in the intermetallic alloy. At high pressures, a TiNiSi-type hydride was formed. The study also showed that scandium behaves similarly to the heavy rare earth metal holmium.
Article
Materials Science, Multidisciplinary
V. V. Berezovets, A. R. Kytsya, T. M. Zasadnyy, I. Yu. Zavaliy, V. A. Yartys
Summary: A composite material based on magnesium hydride and citric acid was synthesized by mechanical milling in an argon atmosphere and used for hydrogen generation in the laboratory. The resulting composite material showed faster hydrogen release in hydrolysis reaction compared to pure MgH2. The effect of the composition on the hydrolysis reaction of MgH2 was studied to determine the optimal composition for hydrogen generation devices. The positive influence of citric acid on the hydrolysis of magnesium hydride was analyzed.
Article
Energy & Fuels
V Yartys, I Zavaliy, V Berezovets, Yu Pirskyy, F. Manilevich, A. Kytsya, Yu Verbovytskyy, Yu Dubov, A. Kutsyi
Summary: An autonomous power supply device based on a 30 W fuel cell stack and a hydrolysis-type hydrogen generator was developed. It included the construction of a hydrogen generation unit, development of an electronic control unit, and performance testing and optimization. The system efficiently generates H-2 using a flat type reactor with Pt catalyst deposited on cordierite as a support and a 10% solution of NaBH4. The electronic control unit effectively regulates the hydrolysis reaction rate and provides the required hydrogen supply to the fuel cell.
JOURNAL OF PHYSICS-ENERGY
(2023)
Article
Energy & Fuels
Ika Dewi Wijayanti, Volodymyr A. Yartys
Summary: This paper investigates the electrochemical performance of Hf-modified Ti-Zr based AB2 Laves type metal hydride battery anode alloys. The alloys were characterized by X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM), and the electrochemical performance was studied through PCT diagrams and electrochemical tests. The Hf content in the alloys affected the phase composition, electrochemical discharge capacities, exchange current densities, H diffusion rates, and hydrogen storage capacity. The presence of Hf resulted in a decrease in discharge capacities and exchange current densities, while the alloy with the lowest Hf content showed the highest H storage capacity. The modification of the intrinsic properties of the alloys with Hf substitution played a role in the observed effects.
JOURNAL OF ENERGY STORAGE
(2023)
Editorial Material
Chemistry, Physical
Volodymyr A. Yartys, Fermin Cuevas
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Volodymyr A. Yartys, Colin J. Webb, Fermin Cuevas
Summary: The paper provides an overview of advanced in situ diffraction studies for probing the structure and reacting mechanisms of hydrogen and energy storage materials. These studies utilize high flux diffraction beam and high resolution measurements to establish the mechanism of phase-structural transformations and their kinetics. Various conditions, such as hydrogen/deuterium pressures and temperatures, as well as different charge-discharge states, are considered. The paper also highlights the contributions of Dr. Michel Latroche and summarises a long-standing collaboration between the co-authors in the field.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Energy & Fuels
Ihor Zavaliy, Vasyl Berezovets, Roman Denys, Oleksandr Kononiuk, Volodymyr Yartys
Summary: The catalytic effect of eta-Zr3V3O0.6 mixed suboxide and graphite additives on MgH2 properties in hydrogen storage and generation processes was investigated. Hydride composites were obtained by reactive ball milling and characterized using XRD and SEM. The addition of Zr3V3O0.6 and graphite significantly enhanced hydrogen absorption and desorption rates, as well as lowered the activation energy and desorption temperature. The synthesized composite showed improved kinetics and enhanced hydrogenation capacity, making it a promising material for hydrogen storage. The catalytic composites also exhibited efficient hydrogen generation in hydrolysis reaction. Overall, the research received a rating of 8 out of 10.
JOURNAL OF ENERGY STORAGE
(2023)
Review
Energy & Fuels
Thabang R. Somo, Mykhaylo V. Lototskyy, Volodymyr A. Yartys, Moegamat Wafeeq Davids, Serge Nyallang Nyamsi
Summary: High entropy alloys (HEAs) formed by multi-principal elements show promising hydrogen storage performance. The properties of HEAs are related to their chemical composition and constituent elements, including electronegativity, atomic radii, and valence electron concentration. This review aims to clarify these features by performing systematic analysis of available experimental data. The analysis shows that valence electron concentration plays the most significant role in tuning the hydrogen storage performance of HEAs.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Inorganic & Nuclear
ChuBin Wan, R. Denys, V. A. Yartys
Summary: This study focuses on the influence of yttrium on the crystal structure, hydrogenation properties, and electrochemical behaviors of PuNi3-type La2-xYxMgNi9 alloys. The results show that the addition of yttrium affects the crystal structure and improves the hydrogen storage capacity and electrochemical performance of the alloys, making them promising materials for hydrogen storage and battery electrodes.
DALTON TRANSACTIONS
(2022)