Recent progress in magnesium hydride modified through catalysis and nanoconfinement

Zhang, J.; Yan, Shuai; Qu, Hui

doi:10.1016/j.ijhydene.2017.11.135

Cited by 128 publications

(36 citation statements)

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“…Magnesium hydride (MgH 2 ) is a well known solid-sate hydrogen storage material with promising fuel-cell and mobile applications [1][2][3][4][5][6]. This low-cost energy material shows high volumetric (110 g/L) and gravimetric (7.6 wt%) storage capacity [7].…”

Section: Introductionmentioning

confidence: 99%

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Synergistic Effect of New ZrNi5/Nb2O5 Catalytic Agent on Storage Behavior of Nanocrystalline MgH2 Powders

2019

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Due to its availability and high storage capacity, Mg is an ideal material in hydrogen storage applications. In practice, doping Mg/MgH2 with catalyst(s) is necessary in enhancing the de/rehydrogenation kinetics and minimizing both of decomposition temperature and its related apparent activation energy. The present study proposed a new heterogeneous catalytic agent that consisted of intermetallic compound (ZrNi5)/metal oxide (Nb2O5) binary system for using with different concentrations (5−30 wt%) to improve MgH2. Doping MgH2 powders with low concentration (5, 7, 10 wt%) of this new catalytic system led to superior absorption/desorption kinetics, being indexed by the short time that is required to absorb/desorb 4.2−5.6 wt% H2 within 200 s to 300 s. Increasing the doping dose to 15–30 wt% led to better kinetic effect but a significant decrease in the hydrogen storage capacity was seen. The dependent of apparent activation energy and decomposition temperature of MgH2 on the concentration of ZrNi5/Nb2O5 has been investigated. They tended to be linearly decreased with increasing the catalyst concentrations. The results elucidated the crucial role of catalytic additives on the disintegration of MgH2 into ultrafine powders (196 nm to 364 nm diameter). The formation of such nanoparticles enhance the hydrogen diffusion and shorten the time that is required for the hydrogenation/dehydrogenation process. Moreover, this refractory catalytic system acted as a grain growth inhibitor, in which Mg/MgH2 powders maintained their submicron level during the cycle-life-test that was extended to 100 h at 200 °C.

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Section: Introductionmentioning

confidence: 99%

“…Within the last three decades, MgH 2 was targeted by a great number of catalysts that were employed to enhance its behavior. Pure metals, metal alloys and intermetallic compounds, metallic glasses, metal oxides, carbides, and fluorides are some examples of catalysts that were devoted to improve MgH 2 [5,[7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of New ZrNi5/Nb2O5 Catalytic Agent on Storage Behavior of Nanocrystalline MgH2 Powders

2019

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“…[107][108][109] In 2017, a comprehensive review article published by Zhang et al presented the recent progress achieved to improve MgH 2 through catalytic agents and nanoconnement. 110 Mg and Mg 2 Ni were suggested 52 years ago as being suitable for use in internal combustion engines in the car industry. 110 In this work, the heat generated from the exhaust gas of the vehicle was utilized as the heat necessary for releasing hydrogen.…”

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confidence: 99%

“…110 Mg and Mg 2 Ni were suggested 52 years ago as being suitable for use in internal combustion engines in the car industry. 110 In this work, the heat generated from the exhaust gas of the vehicle was utilized as the heat necessary for releasing hydrogen. 111,112 In addition, Mg-based materials, in particularly Mg 2 Ni alloy, have been extensively proposed for waste heat recovery and for use as thermal batteries for concentrating solar thermal power.…”

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confidence: 99%

Recent developments in the fabrication, characterization and implementation of MgH₂-based solid-hydrogen materials in the Kuwait Institute for Scientific Research

El‐Eskandarany

2019

RSC Adv.

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“…Magnesium (Mg) alloys, as the lightest structural metallic material, have received considerable attention in the application of lightweight structural components in the areas of automotive, telecommunication electronics, aerospace and other fields [1,2]. However, the disadvantages of low strength or poor formability based on limited active slip system availability (hexagonal close-packed, HCP structure) restrict their applications [3,4].…”

Section: Introductionmentioning

confidence: 99%

Influence of Extrusion Speed on the Microstructure Evolution, Interface Bonding and Mechanical Response of Mg MB26/Al 7075 Composite Rod

Zhang

Zhou

et al. 2018

Acta Metall. Sin. (Engl. Lett.)

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The Mg MB26/Al 7075 composite rod, in which Mg MB26 serves as the sleeve and Al 7075 serves as the core, is fabricated via the process of co-extrusion. The influence of extrusion speed on the microstructure evolution, interface bonding and mechanical response of the Mg MB26/Al 7075 composite rod is investigated. The results show that the typical extrusion texture of Mg sleeve does not change during co-extrusion; however, the average grain size in the Mg sleeve slightly changes from 1.57 lm in the case of extrusion speed of 0.3 mm/s to 2.78 lm in the case of extrusion speed of 2.1 mm/s. The thickness of interface transition layer increases significantly from 5.5 to 50 lm, and therefore, the interface bonding becomes deteriorative with increasing extrusion speed; in particular, many cavities emerge in the case of 1.2 and 2.1 mm/s.

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Recent progress in magnesium hydride modified through catalysis and nanoconfinement

Cited by 128 publications

References 135 publications

Synergistic Effect of New ZrNi5/Nb2O5 Catalytic Agent on Storage Behavior of Nanocrystalline MgH2 Powders

Synergistic Effect of New ZrNi5/Nb2O5 Catalytic Agent on Storage Behavior of Nanocrystalline MgH2 Powders

Recent developments in the fabrication, characterization and implementation of MgH₂-based solid-hydrogen materials in the Kuwait Institute for Scientific Research

Influence of Extrusion Speed on the Microstructure Evolution, Interface Bonding and Mechanical Response of Mg MB26/Al 7075 Composite Rod

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Recent progress in magnesium hydride modified through catalysis and nanoconfinement

Cited by 128 publications

References 135 publications

Synergistic Effect of New ZrNi5/Nb2O5 Catalytic Agent on Storage Behavior of Nanocrystalline MgH2 Powders

Synergistic Effect of New ZrNi5/Nb2O5 Catalytic Agent on Storage Behavior of Nanocrystalline MgH2 Powders

Recent developments in the fabrication, characterization and implementation of MgH2-based solid-hydrogen materials in the Kuwait Institute for Scientific Research

Influence of Extrusion Speed on the Microstructure Evolution, Interface Bonding and Mechanical Response of Mg MB26/Al 7075 Composite Rod

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Product

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Recent developments in the fabrication, characterization and implementation of MgH₂-based solid-hydrogen materials in the Kuwait Institute for Scientific Research