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
Chemistry, Physical
Igor Milanovic, Sanja Milosevic Govedarovic, Sandra Kurko, Mirjana Medic Ilic, Dragan Rajnovic, Slobodan Cvetkovic, Jasmina Grbovic Novakovic
Summary: NaNH2-MgH2 composites synthesized by mechanical milling exhibit a shift of hydrogen desorption peaks to lower temperatures, enhanced kinetic properties, and lower apparent activation energy. The desorption mechanism changes from Avrami-Erofeev n = 3 for as received MgH2 to Avrami-Erofeev n = 4 for composites. The synergistic effect of chemical reaction and structural changes caused by ball milling provides a starting point for the synthesis of innovative hydrogen storage materials.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Bosang Luo, Zhendong Yao, Xuezhang Xiao, Zhouming Hang, Fulei Jiang, Meijia Liu, Lixin Chen
Summary: By adjusting the molar ratio of MgH2 and NH4Cl to 2:1, the hydrogen desorption peak temperature can be decreased to 164.8 degrees C, while the generation of ammonia is significantly suppressed. Furthermore, the introduction of graphene to the 2MgH(2)+NH4Cl composite further reduces the hydrogen release temperature to 161.2 degrees C and improves the hydrogen purity to 97.26%. The smaller particle size and better dispersion of the 2MgH(2)+NH4Cl/graphene composite allow for enhanced interaction between H delta+ and H delta-, resulting in improved hydrogen desorption temperature and purity.
MATERIALS CHEMISTRY AND PHYSICS
(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
Soufiane Bahou, Hicham Labrim, Marwan Lakhal, Mohamed Bhihi, Bouchaib Hartiti, Hamid Ez-Zahraouy
Summary: By studying the effect of magnesium vacancies and hydrogen doping on magnesium hydride, it is found that they contribute to enhancing the hydrogen storage properties of the hydride by reducing desorption temperature and stability. It is noteworthy that controlling the concentrations of magnesium vacancies and hydrogen dopant atoms can regulate the desorption temperature, optimizing the practical application of the hydride in fuel cell vehicles.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Pawan K. Soni, A. Bhatnagar, V Shukla, M. A. Shaz
Summary: Graphene templated Ti-Ni-Fe nanoparticles (TieNieFe@Gr) exhibit excellent catalytic effect on the de/re-hydrogenation characteristics of MgH2, lowering the onset desorption temperature and improving cycling performance. Analysis suggests possible electronic exchange between the catalyst and Mg/MgH2. Anchoring on the graphene template prevents agglomeration that would be detrimental to cycling performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Nanoscience & Nanotechnology
Zhongliang Ma, Jinlian Ni, Zhao Qian, Jiangchuan Liu, Yunfeng Zhu, Jiguang Zhang, Hai-Wen Li, Yana Liu, Zhixin Ba, Liquan Li
Summary: Doping a catalyst can improve the hydrogen reaction kinetics of MgH2, but the hydrogen desorption behaviors in different MgH2-catalyst systems are complicated. A carbon-encapsulated nickel (Ni@C) core-shell catalyst is synthesized to enhance the hydrogen storage properties of MgH2. The study provides new insights into the hydrogen desorption behaviors and reveals the short-range nanoreaction effect in the MgH2-catalyst system.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Darvaish Khan, Jianxin Zou, Saz Muhammad, Niaz Ali Khan, Shah Saud, Subrata Panda
Summary: The MgH2-Ru composite was prepared through mechanical ball milling of MgH2 and Ru powders, exhibiting uniform distribution of Ru nanoparticles and formation of intermetallic compounds after dehydrogenation. The catalytic role of Ru under low temperature and pressure conditions significantly improved the de/hydrogenation properties of MgH2. The MgH2-Ru composite demonstrated lower onset temperature for hydrogen release, faster hydrogen absorption and release rates, and reduced activation energies compared to pure MgH2.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Laura Bonometti, Florian Kraus, Tim Graubner, Antti J. Karttunen, Bartolomeo Civalleri, Lorenzo Dona, Lorenzo Maschio
Summary: In this research, we conducted a comprehensive theoretical and experimental characterization of alpha sodium amide (NaNH2), including novel measured and simulated vibrational spectra (IR and Raman) as well as X-ray diffraction patterns. We proposed a new hypothesis of a low-temperature symmetry breaking of the compound's structure to space group C2/c, contrary to the commonly reported Fddd space group found experimentally. Additionally, we provided a theoretical estimate of the heat of formation of sodium amide from ammonia, which was -12.2 kcal/mol at ambient conditions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Huiying Qi, Tonghuan Zhang, Shixue Zhou, Baofeng Tu
Summary: This study reveals the relationship between the crystal structure and the hydrogen desorption activity of MgH2. The unit cell lattice constant a of beta-MgH2 is found to be the critical parameter determining the dehydrogenation temperature, with a negative correlation. Cobalt is found to have the best catalytic effect on beta-MgH2, with the lowest initial temperature of hydrogen desorption.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Thermodynamics
Nyallang Nyamsi, Zhen Wu, Zaoxiao Zhang, Andrei Kolesnikov, Mykhaylo V. Lototskyy, Sivakumar Pasupathi
Summary: Mg-based hydrides have high intrinsic hydrogen capacity, but their hydrogen absorption and desorption kinetics are limited by slow reactions and heat and mass transfer. This study numerically investigates the dehydrogenation performance of a cylindrical container filled with ball milled Mg90Ti10 + 5 wt% C and suggests operating conditions that can meet the hydrogen flow rate requirement for a fuel cell.
APPLIED THERMAL ENGINEERING
(2022)
Article
Chemistry, Physical
Fatemeh Zahra Akbarzadeh, Mohammad Rajabi
Summary: This study utilized mechanical alloying to synthesize magnesium-based nanocomposites for hydrogen storage, and investigated the hydrogen desorption properties of the prepared nanocomposites through experiments and molecular dynamics simulations.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Heng Lu, Jianbo Li, Tianyu Xie, Yu'an Chen, Yangfan Lu, Zhongqing Liu, Qian Li, Fusheng Pan
Summary: This study reports that with the help of Al/AlH3, NaBH4 can serve as a reversible hydrogen storage host and reactant in the Mg/MgH2 system. The addition of Al species can promote the decomposition and reformation of NaBH4, leading to improved performance of the hydrogen storage material.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Yuanyuan Shang, Ou Jin, Julian Atillio Puszkiel, Fahim Karimi, Palmarin Dansirima, Chongsutthamani Sittiwet, Rapee Utke, Siriwat Soontaranon, Thi Thu Le, Gokhan Gizer, Dorothee Vinga Szabo, Stefan Wagner, Christian Kuebel, Thomas Klassen, Martin Dornheim, Astrid Pundt, Claudio Pistidda
Summary: This study systematically investigates the effect of selected metal-based additives on the dehydrogenation properties of the reactive hydride composite (RHC) model system 2NaBH4+MgH2. The addition of 3TiCl3·AlCl3 enhances the dehydrogenation kinetics and changes the controlling mechanism of the second dehydrogenation step. Microstructural analysis using high-resolution transmission electron microscopy (HRTEM) reveals significant differences in the MgB2 morphology between the doped and undoped systems.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Bo Han, Yuxiao Jia, Jianchuan Wang, Xuezhang Xiao, Lixin Chen, Lixian Sun, Yong Du
Summary: In this work, the structural and kinetic properties of pure and Ti-doped Mg(0001)/MgH2(110) interfaces were studied using first principles methods. It is found that Ti doping can improve the stability of the interface, promote hydrogen atom migration, and enhance the hydrogen desorption process mainly within the interface.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Saif ZS. Al Ghafri, Caitlin Revell, Mauricio Di Lorenzo, Gongkui Xiao, Craig E. Buckley, Eric F. May, Michael Johns
Summary: A comprehensive techno-economic assessment demonstrates the viability of a complete hydrogen supply chain based on the transport of liquefied natural gas (LNG), which can significantly reduce CO2 emissions and meet targeted hydrogen supply costs up to 2050. Steam methane reforming (SMR) with carbon capture and storage (CCS) is the most cost-effective and has the lowest CO2 emission intensity among the assessed hydrogen production technologies. Future technologies and strategies can further reduce cost and supply chain emissions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Thomas A. Hales, Kasper T. Moller, Terry D. Humphries, Anita M. D'Angelo, Craig E. Buckley, Mark Paskevicius
Summary: Metal dodecaborate salts are highly tunable ion conductors. By replacing a [B-H] unit with a Pb atom, the crystal structure of alkali metal salts can be modified to enhance ion conductivity. Li2B11H11Pb center dot xH2O exhibits similar superionic conductivity to LiCB11H12, while Na2B11H11Pb center dot xH2O and the potassium salt show lower conductivities. The divalent B11H11Pb2- anion in the dodecaborate cage may contribute to the weaker ion conductivity compared to CB11H12-. However, the insertion of a lead atom shows promise in enabling high ion conductivity in the solid state.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Amanda Berger, Ainee Ibrahim, Craig E. Buckley, Mark Paskevicius
Summary: Due to insufficient resources, high cost, and safety concerns of Li-ion batteries, alternative technologies are being explored. Multivalent metal batteries with solid-state electrolytes show potential for future battery applications. Divalent hydrated closo-monocarborane salts demonstrate improved ionic conductivity and oxidative stability as solid-state electrolytes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Ainee Ibrahim, Mark Paskevicius, Craig E. E. Buckley
Summary: As the demand for renewable energy increases, the development of energy storage and distribution solutions becomes crucial. Hydrogen, with its high gravimetric energy density, is an abundant energy source that can be used in fuel cells to generate electricity, producing only water vapor as a by-product. In order to improve the volumetric energy density in storage tanks for hydrogen storage and refueling stations, hydrogen compression is required. It is suggested that sodium borohydride (NaBH4), a hydrogen carrier, could be used to transport and chemically compress hydrogen for refueling stations, and the study has demonstrated the chemical compression of hydrogen to over 1000 bar using hydrolysis or methanolysis of NaBH4. Interest has been growing in improving the cost of closed-cycle regeneration of NaBH4 as an energy carrier, and a cost and efficiency analysis shows that it may be cost competitive with alternative methods of hydrogen transport.
SUSTAINABLE ENERGY & FUELS
(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
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)