Article
Chemistry, Physical
Xunxiang Hu, Kurt A. Terrani
Summary: This paper reports the properties of unirradiated bulk yttrium hydride as a function of hydrogen concentration, providing a baseline measurement for further neutron irradiation response studies. It suggests the recommended empirical treatment of the data and discusses other properties that need to be investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Metallurgy & Metallurgical Engineering
Yuanyuan Shang, Claudio Pistidda, Goekhan Gizera, Thomas Klassen, Martin Dornheim
Summary: Magnesium and magnesium based compounds have been extensively studied as potential hydrogen and thermal energy storage materials due to their abundance and high storage densities. Efforts have been made by the scientific community to improve their properties while maintaining high hydrogen storage capacity.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Chemistry, Physical
Huang Liu, Jingxi Zhang, Pei Sun, Chengshang Zhou, Yong Liu, Zhigang Zak Fang
Summary: TiFe alloy is an excellent candidate for stationary hydrogen storage due to its superior properties. However, the need for high-temperature activation has hindered its practical application. This study investigates the activation of TiFe alloys with different ratios and finds that TiFe0.90 alloy can be activated at room temperature and moderate hydrogen pressure, while equimolar TiFe alloy has poor activation kinetics. The presence of Ti4Fe2O1-x phase in the TiFe0.9 alloy plays a critical role in the activation process, serving as a conduit for hydrogen absorption by TiFe.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Green & Sustainable Science & Technology
Yongfeng Liu, Wenxuan Zhang, Xin Zhang, Limei Yang, Zhenguo Huang, Fang Fang, Wenping Sun, Mingxia Gao, Hongge Pan
Summary: Hydrogen storage remains a huge challenge for the development of a sustainable energy system, despite its importance. Light metal hydrides have high hydrogen densities but suffer from slow kinetics and poor reversibility due to strong bonds between metal atoms and hydrogen. Nanoscale particles offer a promising solution to tailor the properties of light metal hydrides and improve their performance. This review summarizes the preparation methods and hydrogen storage performance of nanostructured light metal hydrides, discusses the challenges, and explores future research prospects, highlighting the combination of nanostructuring and nanocatalysis for practical hydrogen carriers.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Chemistry, Physical
Min He, Chidozie Onwudinanti, Yaoting Zheng, Xiaomei Wu, Zaoxiao Zhang, Shuxia Tao
Summary: This study utilized Density Functional Theory (DFT) to analyze the stability of chromium, molybdenum, and vanadium carbides in 2.25Cr1Mo0.25V steel, as well as their corresponding hydrides. The results showed that V6C5 is the most stable carbide in its metal-carbon binary system and exhibits the strongest hydrogen absorption ability.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
E. Ulate-Kolitsky, B. Tougas, J. Huot
Summary: The hydrogenation behavior of TixFe2-x alloys with different titanium content and Zr addition was studied, revealing the phase composition, hydrogenation properties, and the relationship between hydrogen capacity and alloy stability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Manjin Kim, Qinfen Gu, Tanveer Hussain, Yahia Ali, Trevor B. Abbott, Kazuhiro Nogita
Summary: Adding Na to cast Mg-La alloys significantly improves hydrogen absorption kinetics during the first activation cycle. The role of Na in Mg-La alloys has been discussed based on microstructural observations, crystallography, and first principles calculations.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Review
Chemistry, Physical
Yan Wang, Zhe Hu, WeiHua Chen, Shiwei Wu, Guode Li, Shulei Chou
Summary: Hydrogen energy is proposed as a promising energy replacement to resolve the current energy problems for sustaining the long-term development of human society and eventually achieving the hydrogen economy. Seeking appropriate non-noble metal-based catalysts is the vital step that is needed to improve the sluggish kinetics of the hydrolysis process. The study systematically discusses different non-noble metal-based catalysts and emphasizes the importance of developing sustainable and clean hydrogen energy.
Article
Chemistry, Physical
Huang Liu, Jingxi Zhang, Pei Sun, Chengshang Zhou, Yong Liu, Zhigang Zak Fang
Summary: In this study, the effect of oxygen addition on the phase composition and hydrogen storage properties of TiFe alloys was systematically investigated. The results showed that high oxygen content improved the initial hydrogen sorption of TiFe, but reduced the hydrogen capacity. Increasing oxygen content also slightly increased the hydrogenation equilibrium pressure, but had almost no impact on the thermodynamics of TiFe alloy.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Qianyu Qiao, Yao Chen, Yue Wang, Yuqing Ren, Jiazhen Cao, Fengjiao Huang, Zhenfeng Bian
Summary: Photocatalytic recovery is a novel technology for recycling precious metals, which aims to solve the environmental and energy consumption problems caused by traditional technologies. By designing phosphate-modified titanium oxide, the adsorption intensity of oxygen on the catalyst surface is regulated, leading to enhanced dissolution rate of precious metals and improved recovery efficiency.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Michela L. Maiola, Joshua A. Buss
Summary: We have successfully synthesized low-valent tantalum-copper heterometallic compounds that mimic the structural elements of surface alloyed nanomaterials using a metal-metal salt metathesis strategy. Our study also found that the mechanism of bimetallic assembly can be altered by modifying the ancillary ligands. Additionally, we have synthesized a tetranuclear species with unique Ta-Cu interactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Nanoscience & Nanotechnology
Lars J. Bannenberg, Bart Boshuizen, Ferry Anggoro Ardy Nugroho, Herman Schreuders
Summary: Doping Pd with Au results in faster hydrogenation kinetics, while non-Pd-based materials have slower kinetics mainly limited by diffusion. The additional PTFE layer only improves the kinetics of Pd-based capping materials. The method used can simultaneously study the hydrogenation kinetics in thin-film materials for a wide set of experimental conditions.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Suwarno Suwarno, Ghazy Dicky, Abdillah Suyuthi, Mohammad Effendi, Witantyo Witantyo, Lukman Noerochim, Mohammad Ismail
Summary: This study used machine learning approaches to analyze the dataset of AB(2) metal hydrides and discovered the effects of alloying elements on their hydrogen storage properties. The findings are expected to guide further experimental work to optimize the phase structure and hydrogen sorption properties of AB(2) alloys.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Huang Liu, Jingxi Zhang, Chengshang Zhou, Pei Sun, Yong Liu, Zhigang Zak Fang
Summary: This paper investigates the effect of Nb alloying on the microstructure and hydrogen storage properties of Ti-Fe-Zr-Mn-Nbx alloys. The addition of 2% Nb enables a good combination of the hydrogen capacity and activation property, while Zr-rich phases play a critical role in the activation behavior. However, high Nb addition (> 4%) leads to the reduction of Zr-rich phases and deteriorates the activation kinetics. Nb addition also promotes the formation of the TiFe main phase and increases capacities at ambient temperature. The correlations between microstructure and hydrogen storage performance provide insights into tailoring hydrogen storage properties by alloying TiFe with multi-elements.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Shashi Sharma, Rini Singh, Takayuki Ichikawa, Ankur Jain, Shivani Agarwal
Summary: Hydrogen as an energy carrier has great potential for future energy infrastructure. The storage of hydrogen in solid state materials, such as KSiH3, has been proposed as a safe method. In this study, vanadium-based catalysts, particularly V2O5, were added to enhance the kinetics and reduce the activation energy of the KSiH3 system. The addition of V2O5 catalyst enabled hydrogen desorption at lower temperatures and achieved a high weight loss close to the theoretical value, indicating improved reversibility and hydrogen storage capacity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Arif Hariyadi, Suwarno Suwarno, Roman Denys, Jose Bellosta von Colbe, Tor Oskar Saetre, Volodymyr Yartys
Summary: Hydrides of the AB(2) Laves type alloys show efficient hydrogen storage capabilities and are suitable for designing high-performance hydrogen storage devices operating at ambient conditions. Experimental results indicate that the hydrogen absorption and desorption processes are jointly influenced by hydrogen diffusion and grain boundary nucleation, with increasing hydrogen content in the hydride leading to lower activation energies.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
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
Energy & Fuels
Mykhaylo Lototskyy, Vladimir Linkov
Summary: This article presents the research and development activities related to thermally driven hydrogen compression using metal hydrides. The thermally driven metal hydride hydrogen compressor (MHHC) offers advantages such as simple design, high reliability, low operating costs, and high purity of hydrogen. The article focuses on the interrelation between the properties of metal hydride materials and their hydrogen compression performances, as well as the design features and optimization methods of hydrogen compression systems. A brief techno-economic analysis comparing MHHCs with alternative hydrogen compression technologies is also provided, along with outlining the promising application niches of MHHCs.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(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)
Review
Chemistry, Physical
Volodymyr A. Yartys, Mykhaylo V. Lototskyy
Summary: Laves-type intermetallics are a diverse group of compounds that can be used in various applications, including hydrogen gas getters, hydrogen storage materials, hydrogen compression, and metal hydride battery anode materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(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)
Article
Energy & Fuels
Serge Nyallang Nyamsi, Wafeeq Davids, Ivan Tolj, Sivakumar Pasupathi, Mykhaylo Lototskyy
Summary: Thermal batteries using metal hydride pairs are attracting attention for their potential in thermochemical energy storage. The combination of high-temperature metal hydrides, such as Mg-based hydrides, and low-temperature metal hydrides, like AB2 type hydrides, offers high energy storage density and moderate energy storage efficiency. Improving the heat discharging performance of thermal batteries can significantly enhance the energy storage efficiency. In this study, the heat releasing performance of an MgH2/(TiZr)(MnFeCr)2-based thermal battery was experimentally investigated, with a focus on the effects of different LTMH bed heat transfer conditions. The results showed that active heat transfer conditions, such as forced convection or resistive heating, led to a thermochemical energy storage density ranging from 1500 to 1820 kJ/kg-Mg and a relatively high-temperature lift between 47 and 55 degrees Celsius. Additionally, the thermal battery discharged heat at a relatively high specific power, which could be advantageous for heat-to-work conversion applications using organic or steam Rankine cycles.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Inorganic & Nuclear
Boris Tarasov, Artem Arbuzov, Sergey Mozhzhukhin, Aleksey Volodin, Pavel Fursikov, Moegamat Wafeeq Davids, Joshua Adeniran, Mykhaylo Lototskyy
Summary: This study developed a metal hydride (MH) hydrogen storage and compression system based on AB(5)-type intermetallics, which can operate at near-atmospheric H-2 suction pressure. The system provides high productivity in both charge and discharge modes, with H-2 absorption at 1 atm and H-2 desorption at 2-5 atm. The system uses MH powders mixed with Ni-doped graphene-like material or expanded natural graphite for improved H-2 charge dynamics, and exhibits high H-2 flow rates during charging and release.
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)
