Empowering hydrogen storage performance of MgH2 by nanoengineering and nanocatalysis

Zhang, X.L.; Liu, Y.F.; Zhang, X.; Hu, Jianjiang; Gao, Mingxia; Pan, Hongge

doi:10.1016/j.mtnano.2019.100064

Cited by 199 publications

(108 citation statements)

References 180 publications

Supporting

Mentioning

107

Contrasting

Unclassified

Order By: Relevance

“…Nevertheless, its high thermodynamic stability and poor kinetic properties still lie in the way of practical application [ 14 , 15 , 16 ]. To conquer the above challenges, diverse technics like nanoconfinement [ 17 , 18 , 19 , 20 , 21 , 22 ], alloying [ 23 , 24 , 25 , 26 , 27 ], and catalyst doping [ 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ] have been conducted over the past decades.…”

Section: Introductionmentioning

confidence: 99%

Realizing Hydrogen De/Absorption Under Low Temperature for MgH2 by Doping Mn-Based Catalysts

et al. 2020

View full text Add to dashboard Cite

Magnesium hydride (MgH2) has been considered as a potential material for storing hydrogen, but its practical application is still hindered by the kinetic and thermodynamic obstacles. Herein, Mn-based catalysts (MnCl2 and Mn) are adopted and doped into MgH2 to improve its hydrogen storage performance. The onset dehydrogenation temperatures of MnCl2 and submicron-Mn-doped MgH2 are reduced to 225 °C and 183 °C, while the un-doped MgH2 starts to release hydrogen at 315 °C. Further study reveals that 10 wt% of Mn is the better doping amount and the MgH2 + 10 wt% submicron-Mn composite can quickly release 6.6 wt% hydrogen in 8 min at 300 °C. For hydrogenation, the completely dehydrogenated composite starts to absorb hydrogen even at room temperature and almost 3.0 wt% H2 can be rehydrogenated in 30 min under 3 MPa hydrogen at 100 °C. Additionally, the activation energy of hydrogenation reaction for the modified MgH2 composite significantly decreases to 17.3 ± 0.4 kJ/mol, which is much lower than that of the primitive MgH2. Furthermore, the submicron-Mn-doped sample presents favorable cycling stability in 20 cycles, providing a good reference for designing and constructing efficient solid-state hydrogen storage systems for future application.

show abstract

Section: Introductionmentioning

confidence: 99%

Realizing Hydrogen De/Absorption Under Low Temperature for MgH2 by Doping Mn-Based Catalysts

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The mechanically deformed Mg-ribbons obtained after 150 passes were subjected to different types of imperfections upon through RBM process. In this process, the materials were subjected to point and lattice defects, as well as severe dislocations [ 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 ], led to a dramatic reduction of the grain size. The results showed that both the grain size and T dec were linearly decreased parallel to each other upon increasing the RBM time ( Figure 12 b).…”

Section: Resultsmentioning

confidence: 99%

“…Elemental nickel (Ni), titanium (Ti), vanadium (V), and manganese (Mn) metals [ 24 , 25 ], as well as their alloys [ 26 , 27 , 28 , 29 , 30 ] were successfully employed to improve the hydrogen storage behavior of MgH 2 powders. In addition to the metals and their alloys, compounds and metastable catalytic agents, metal-oxides (e.g., Nb 2 O 5 [ 31 , 32 ], Cr 2 O 3 [ 33 ], and TiO 2 [ 34 ], -carbides (e.g., SiC [ 35 ], and TiC [ 36 ]), -hydrides (e.g., TiH 2 [ 37 ], LaH 3 [ 38 ], and NbH [ 38 ]), and carbon-based nanomaterials such as carbon nanotubes [ 39 ], and graphene nanofibers [ 40 ].…”

Section: Introductionmentioning

confidence: 99%

Solid-State Conversion of Magnesium Waste to Advanced Hydrogen-Storage Nanopowder Particles

2020

View full text Add to dashboard Cite

Recycling of metallic solid-waste (SW) components has recently become one of the most attractive topics for scientific research and applications on a global scale. A considerable number of applications are proposed for utilizing metallic SW products in different applications. Utilization of SW magnesium (Mg) metal for tailoring high-hydrogen storage capacity nanoparticles has never been reported as yet. The present study demonstrates the ability to produce pure Mg ingots through a melting and casting approach from Mg-machining chips. The ingots were used as a feedstock material to produce high-quality Mg-ribbons, using a melting/casting and spinning approaches. The ribbons were then subjected to severe plastic deformation through the cold rolling technique. The as-cold roll Mg strips were then snipped into small shots before charging them into reactive ball milling. The milling process was undertaken under high-pressure of pure hydrogen gas (H2), where titanium balls were used as milling media. The final product obtained after 100 h of milling showcased excellent nanocrystalline structure and revealed high hydro/dehydrogenation kinetics at moderate temperature (275 °C). The present study shows that primer cold rolling of Mg-strips before reactive ball milling is a necessary step to prepare ultrafine magnesium hydride (MgH2) nanopowders with advanced absorption/desorption kinetics behavior. These ultrafine powders with their nanocrystalline structure are believed to play an important role in effective gas diffusion process. Moreover, the fine titanium particles came from the ball-powder-ball collisions and introduced to the Mg matrix have not only acted as micro-scaled milling media, but they played a vital catalyzation role for the process.

show abstract

“…Among different solid-state hydrogen storage materials, magnesium hydride (MgH 2 ) has been much discussed and holds tremendous hope for storing hydrogen (Bogdanović and Spliethoff, 1990 ; Norberg et al, 2011 ; Zhang X. L. et al, 2020 ). As the sixth abundant metal element in the earth's crust, magnesium is widely distributed in nature.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Hydrogen Storage Properties of MgH2 by Transition Metals and Carbon Materials: A Brief Review

et al. 2020

View full text Add to dashboard Cite

Magnesium hydride (MgH 2 ) has attracted intense attention worldwide as solid state hydrogen storage materials due to its advantages of high hydrogen capacity, good reversibility, and low cost. However, high thermodynamic stability and slow kinetics of MgH 2 has limited its practical application. We reviewed the recent development in improving the sorption kinetics of MgH 2 and discovered that transition metals and their alloys have been extensively researched to enhance the de/hydrogenation performance of MgH 2 . In addition, to maintain the cycling property during the de/hydrogenation process, carbon materials (graphene, carbon nanotubes, and other materials) have been proved to possess excellent effect. In this work, we introduce various categories of transition metals and their alloys to MgH 2 , focusing on their catalytic effect on improving the hydrogen de/absorption performance of MgH 2 . Besides, carbon materials together with transition metals and their alloys are also summarized in this study, which show better hydrogen storage performance. Finally, the existing problems and challenges of MgH 2 as practical hydrogen storage materials are analyzed and possible solutions are also proposed.

show abstract

Empowering hydrogen storage performance of MgH2 by nanoengineering and nanocatalysis

Cited by 199 publications

References 180 publications

Realizing Hydrogen De/Absorption Under Low Temperature for MgH2 by Doping Mn-Based Catalysts

Realizing Hydrogen De/Absorption Under Low Temperature for MgH2 by Doping Mn-Based Catalysts

Solid-State Conversion of Magnesium Waste to Advanced Hydrogen-Storage Nanopowder Particles

Enhancing Hydrogen Storage Properties of MgH2 by Transition Metals and Carbon Materials: A Brief Review

Contact Info

Product

Resources

About