Thermodynamics and kinetics of hydriding and dehydriding reactions in Mg-based hydrogen storage materials

Hydrogen storage materials have been a subject of intensive research during the last 4 decades. Several developments have been achieved in regard of finding suitable materials as per the US-DOE targets. While the lightweight metal hydrides and complex hydrides meet the targeted hydrogen capacity, these possess difficulties of hard thermodynamics and sluggish kinetics of hydrogen sorption. A number of methods have been explored to tune the thermodynamic and kinetic properties of these materials. The thermodynamic constraints could be resolved using an intermediate step of alloying or by making reactive composites with other hydrogen storage materials, whereas the sluggish kinetics could be improved using several approaches such as downsizing and the use of catalysts. The catalyst addition reduces the activation barrier and enhances the sorption rate of hydrogen absorption/desorption. In this review, the catalytic modifications of lightweight hydrogen storage materials are reported and the mechanism towards the improvement is discussed.

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Metallic Ni nanocatalyst in situ formed from a metal–organic-framework by mechanochemical reaction for hydrogen storage in magnesium

Journal of Materials Chemistry A ◽

10.1039/c5ta00278h ◽

2015 ◽

Vol 3 (16) ◽

pp. 8294-8299 ◽

Cited By ~ 41

Author(s):

Yi Jia ◽

Chenghua Sun ◽

Ye Peng ◽

Wenqi Fang ◽

Xuecheng Yan ◽

...

Keyword(s):

Hydrogen Storage ◽

Metal Organic Framework ◽

Mechanochemical Reaction ◽

Hydrogen Storage Materials ◽

Storage Materials ◽

Metal Organic ◽

Kinetics Of ◽

Organic Framework

The facile and scalable fabrication of ultrafine (<5 nm) nanoparticles (NPs) as effective catalysts is the key for enhancing the kinetics of most hydrogen storage materials (HSMs).

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Decomposition kinetics of lithium amide for hydrogen storage materials

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2005.01.059 ◽

2005 ◽

Vol 400 (1-2) ◽

pp. 76-82 ◽

Cited By ~ 71

Author(s):

F.E. Pinkerton

Keyword(s):

Hydrogen Storage ◽

Decomposition Kinetics ◽

Hydrogen Storage Materials ◽

Lithium Amide ◽

Storage Materials ◽

Kinetics Of

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Enhancement of Ti-Cr-V BCC alloys on the dehydrogenation kinetics of Li-Mg-N-H hydrogen storage materials

Rare Metals ◽

10.1007/s12598-010-0181-5 ◽

2010 ◽

Vol 29 (6) ◽

pp. 621-624 ◽

Cited By ~ 7

Author(s):

Jingchuan Wang ◽

Zhinian Li ◽

Hualing Li ◽

Jing Mi ◽

Fang Lü ◽

...

Keyword(s):

Hydrogen Storage ◽

Hydrogen Storage Materials ◽

Storage Materials ◽

Dehydrogenation Kinetics ◽

Kinetics Of

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The Effect of Graphite and Fe2O3 Addition on Hydrolysis Kinetics of Mg-Based Hydrogen Storage Materials

International Journal of Photoenergy ◽

10.1155/2021/6651541 ◽

2021 ◽

Vol 2021 ◽

pp. 1-8

Author(s):

Kun Yang ◽

Hongyun Qin ◽

Junnan Lv ◽

Rujun Yu ◽

Xia Chen ◽

...

Keyword(s):

Hydrogen Storage ◽

Conversion Rate ◽

Composite Powder ◽

Physical Structure ◽

Hydrogen Release ◽

Hydrolysis Kinetics ◽

Hydrogen Storage Materials ◽

Storage Materials ◽

Kinetics Of ◽

Hydrolysis Of

In this paper, graphite and Fe2O3 are introduced into MgH2 powder by the method of hydrogenation after magnetic grinding. Hydrogen storage materials which composite of MgH2–5 wt.% C and MgH2–5 wt.% C–5 wt.% Fe2O3 are successfully prepared. The physical structure of these materials was analyzed and characterized by XRD, SEM, etc. Furthermore, the influence of graphite and Fe2O3 on the hydrolysis of MgH2 was systematically investigated. The results show that MgH2–C–Fe2O3 composite powder has the fastest hydrogen release rate in municipal drinking water and the highest conversion rate. Graphite and Fe2O3 can effectively reduce the activation energy of the hydrolysis reaction of MgH2 and improve the hydrolysis kinetics of MgH2. The synergistic effect of the coaddition of graphite and Fe2O3 can significantly increase the hydrolysis conversion rate of MgH2 and improve the hydrolysis kinetics.

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