Enhanced Hydrogen Storage Performance of MgH2 by the Catalysis of a Novel Intersected Y2O3/NiO Hybrid

Liu, Yushan; Wang, Shun; Li, Zhenglong; Gao, Mingxia; Liu, Yongfeng; Sun, Wenping; Pan, Hongge

doi:10.3390/pr9050892

Cited by 18 publications

(4 citation statements)

References 58 publications

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“…High‐rate TEM proved that the alloy was still polycrystalline after hydrogen absorption. The existence of MgH 2 , PrH 2.93 and Mg 2 NiH 4 crystals and the generation of dislocations will increase grain boundaries and provide channels for hydrogen absorption 28 . After hydrogen is released ultimately, the nanocrystalline structure still exists.…”

Section: Resultsmentioning

confidence: 99%

Hydrogen storage kinetics and thermodynamics of Mg‐based alloys by rare earth doping and Ni substitution

Bu¹,

Peng²,

Liu³

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND The traditional means of hydrogen storage cannot meet the widespread application of hydrogen energy. Therefore, developing new and efficient hydrogen storage materials and safe hydrogen storage technology is a top priority, which can effectively solve the problem of hydrogen storage and delivery. Its development and application are of great significance to environmental protection and energy development. RESULTS Pr5Mg95−xNix (x = 5, 10, 15) were prepared by induction furnace melting, and the effect of Ni content on the kinetics and thermodynamics of the alloys were systematically investigated. The phase composition, microstructure and storage properties of gaseous hydrogen were investigated using X‐ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that the change in Ni content significantly improves the kinetic properties of the alloys in terms of adsorption and desorption. However, it has little effect on the thermodynamic properties of the alloys. CONCLUSION The lattice of the alloys expands after hydrogenation and shrinks after the release of hydrogen. The change of lattice stress leads to cracking or even fracture of alloy particles and, the higher the nickel content, the more cracks there are. Thus, the specific surface area of the alloys is increased and the contact area with hydrogen is expanded, promoting hydrogen diffusion within the material and improving the hydrogen absorption and desorption rate. Furthermore, as the Ni content increases, the dehydrogenation activation energy of the alloys decreases significantly, which is the main reason for the improved dehydrogenation kinetics of the alloys. © 2021 Society of Chemical Industry (SCI).

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Section: Resultsmentioning

confidence: 99%

Hydrogen storage kinetics and thermodynamics of Mg‐based alloys by rare earth doping and Ni substitution

Bu¹,

Peng²,

Liu³

et al. 2022

J of Chemical Tech & Biotech

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“…The NaMgH 3 -7 wt.% Ti 3 C 2 sample exhibits the optimal dehydrogenation performance, reducing the two-step desorption peak temperatures from 372. 3…”

Section: Discussionmentioning

confidence: 99%

“…Sodium-based hydrides such as NaH, MgH 2 (simple binary hydrides), NaBH 4 (borohydride), NaAlH 4 (alanates hydride), and NaMgH 3 (perovskite hydride) have been researched as promising candidates for hydrogen storage or thermal energy storage during the past decades [1][2][3][4][5][6][7][8]. As the GdFeO 3 -type perovskite (space group P nma ) hydride, NaMgH 3 has received considerable attention for its high gravimetric and volumetric hydrogen densities (6 wt.% and 88 kg/m 3 ) and possesses a considerable theoretical thermal storage gravimetric density (2881 kJ/kg) with reversible two-step de/re-hydrogenation process [9][10][11][12][13][14][15]:…”

Section: Introductionmentioning

confidence: 99%

Enhancing Hydrogen Storage Kinetics and Cycling Properties of NaMgH3 by 2D Transition Metal Carbide MXene Ti3C2

Hang

Xiao

et al. 2021

Processes

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Metal hydrides have recently been proposed for not only hydrogen storage materials but also high-efficiency thermal storage materials. NaMgH3 contains a considerable theoretical thermal storage density of 2881 kJ/kg. However, its sluggish de/re-hydrogenation reaction kinetics and poor cycling stability exhibit unavailable energy efficiency. Doping with active catalyst into NaMgH3 is deemed to be a potential strategy to mitigate these disadvantages. In this work, the enhancement of de/re-hydrogenation kinetics and cycling properties of NaMgH3 is investigated by doping with lamellar-structure 2D carbon-based MXene, Ti3C2. Results shows that introducing 7 wt.% Ti3C2 is proved to perform excellent catalytic efficiency for NaMgH3, dramatically reducing the two-step hydrogen desorption peak temperatures (324.8 and 345.3 °C) and enhancing the de/re-hydrogenation kinetic properties with the hydrogen desorption capacity of 4.8 wt.% H2 within 15 min at 365 °C and absorption capacity of 3.5 wt.% H2 within 6 s. Further microstructure analyses reveal that the unique lamellar-structure of Ti3C2 can separate the agglomerated NaMgH3 particles homogeneously and decrease the energy barriers of two-step reaction of NaMgH3 (114.08 and 139.40 kJ/mol). Especially, lamellar-structure Ti3C2 can improve the reversibility of hydrogen storage of NaMgH3, rendering 4.6 wt.% H2 capacity remained after five cycles. The thermal storage density of the composite is determined to be 2562 kJ/kg through DSC profiles, which is suitable for thermal energy storage application.

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“…A chemisorption technique is used for storing hydrogen gas as a form of metal hydrides in a solid-state [30][31][32]. This technique has been spotlighted due to its high storage density, remarkable stability, and small space occupancy [33][34][35][36]. A number of metal hydride vessels have been developed [37][38][39].…”

Section: Hydrogen Storage Techniquesmentioning

confidence: 99%

Recent Progress Using Solid-State Materials for Hydrogen Storage: A Short Review

Lee

Kim

et al. 2022

Processes

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With the rapid growth in demand for effective and renewable energy, the hydrogen era has begun. To meet commercial requirements, efficient hydrogen storage techniques are required. So far, four techniques have been suggested for hydrogen storage: compressed storage, hydrogen liquefaction, chemical absorption, and physical adsorption. Currently, high-pressure compressed tanks are used in the industry; however, certain limitations such as high costs, safety concerns, undesirable amounts of occupied space, and low storage capacities are still challenges. Physical hydrogen adsorption is one of the most promising techniques; it uses porous adsorbents, which have material benefits such as low costs, high storage densities, and fast charging–discharging kinetics. During adsorption on material surfaces, hydrogen molecules weakly adsorb at the surface of adsorbents via long-range dispersion forces. The largest challenge in the hydrogen era is the development of progressive materials for efficient hydrogen storage. In designing efficient adsorbents, understanding interfacial interactions between hydrogen molecules and porous material surfaces is important. In this review, we briefly summarize a hydrogen storage technique based on US DOE classifications and examine hydrogen storage targets for feasible commercialization. We also address recent trends in the development of hydrogen storage materials. Lastly, we propose spillover mechanisms for efficient hydrogen storage using solid-state adsorbents.

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Enhanced Hydrogen Storage Performance of MgH2 by the Catalysis of a Novel Intersected Y2O3/NiO Hybrid

Cited by 18 publications

References 58 publications

Hydrogen storage kinetics and thermodynamics of Mg‐based alloys by rare earth doping and Ni substitution

Hydrogen storage kinetics and thermodynamics of Mg‐based alloys by rare earth doping and Ni substitution

Enhancing Hydrogen Storage Kinetics and Cycling Properties of NaMgH3 by 2D Transition Metal Carbide MXene Ti3C2

Recent Progress Using Solid-State Materials for Hydrogen Storage: A Short Review

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