Ternary amide-hydride system: A study on LiAl(NH2)4-LiAlH4 interaction

Chua, Yong Shen; Xiong, Zhitao; Wu, Guotao; Chen, Ping

doi:10.1016/j.jallcom.2019.03.234

Cited by 8 publications

(5 citation statements)

References 24 publications

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“…Although research on applications of amides/imides for hydrogen storage materials is still progressing [283][284][285][286][287][288][289][290][291][292][293], most recent efforts have been focused on their application as catalysts or co-catalysts in ammonia synthesis and decomposition, as solid-state electrolytes for batteries, and novel amide/imides with multifunctional energy applications [285,[294][295][296][297][298][299][300][301][302]. For instance, by ball milling mixtures of lithium amide, lithium imide and lithium nitride-hydride, Makepeace et al [296] recently reported an amide-imide solid solution with wide-ranging anion compositions.…”

Section: Amides and Imidesmentioning

confidence: 99%

“…However, the decomposed residue, LiAl(NH) 2 reacted with LiAlH 4 , leading to rapid hydrogen release. The basicity of the hydrides was found to be an important point in triggering amide-hydride interactions, which leads to low hydrogen release temperatures [286]. In another recent study, Zhang et al [291] examined the effects of Na addition on the reversible hydrogen uptake of Mg(NH 2 ) 2 -MgH 2 system.…”

Section: Amides and Imidesmentioning

confidence: 99%

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Hydrogen storage in complex hydrides: past activities and new trends

et al. 2022

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Intense literature and research efforts have focussed on the exploration of complex hydrides for energy storage applications over the past decades. A focus was dedicated to the determination of their thermodynamic and hydrogen storage properties, due to their high gravimetric and volumetric hydrogen storage capacities, but their application has been limited because of harsh working conditions for reversible hydrogen release and uptake. The present review aims at appraising the recent advances on different complex hydride systems, coming from the proficient collaborative activities in the past years from the research groups led by the experts of the Task 40 “Energy Storage and Conversion Based on Hydrogen” of the Hydrogen Technology Collaboration Programme of the International Energy Agency. An overview of materials design, synthesis, tailoring and modelling approaches, hydrogen release and uptake mechanisms and thermodynamic aspects are reviewed to define new trends and suggest new possible applications for these highly tuneable materials.

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Section: Amides and Imidesmentioning

confidence: 99%

Section: Amides and Imidesmentioning

confidence: 99%

Hydrogen storage in complex hydrides: past activities and new trends

et al. 2022

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“…Remarkably, all of the amine-stabilized LiAlH 4 started to release hydrogen from 75 • C (Figure S23). Indeed, many LiAlH 4 -NH 2 systems have been reported to induce hydrogen release at low temperatures [81,82], owing to the H δ+ (amine) and H δ− (hydride) interaction [83]. For LiAlH 4 stabilized by thiol bases surfactants, a modest amount of hydrogen was observed between 65 to 160 • C prior to the major decomposition of LiAlH 4 into Li 3 AlH 6 at ~200 • C (Figure 11 and Figure S24).…”

Section: Hydrogen Desorption Propertiesmentioning

confidence: 99%

Surfactant Induced Synthesis of LiAlH4 and NaAlH4 Nanoparticles for Hydrogen Storage

Pratthana

Aguey‐Zinsou

2022

Applied Sciences

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LiAlH4 and NaAlH4 are considered to be promising hydrogen storage materials due to their high hydrogen density. However, their practical use is hampered by the lack of hydrogen reversibility along with poor kinetics. Nanosizing is an effective strategy to enable hydrogen reversibility under practical conditions. However, this has remained elusive as the synthesis of alanate nanoparticles has not been explored. Herein, a simple solvent evaporation method is demonstrated to assemble alanate nanoparticles with the use of surfactants as a stabilizer. More importantly, the roles of the surfactants in enabling control over particle size and morphology was determined. Surfactants with long linear carbon chains and matching the hard character of alanates are more prone to lead to the formation of small particles of ~10 nm due to steric hindrance. This can result in significant shifts in the temperature for hydrogen release.

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“…Hydrogen release of 7.5 wt % took place at room temperature during the ball milling process. 18 Very recently, Cao reported a novel amide-hydride storage system consisting of Rb 2 Zn(NH 2 ) 4 -8LiH. 19 The multication amide Rb 2 Zn(NH 2 ) 4 was synthesized via an ammonothermal method and mixed with LiH, which can reversibly store hydrogen with fast kinetics.…”

Section: Introductionmentioning

confidence: 99%

“…Chua et al reported a ternary amide-complex hydride system of LiAl(NH 2 ) 4 and LiAlH 4 . Hydrogen release of 7.5 wt % took place at room temperature during the ball milling process . Very recently, Cao reported a novel amide-hydride storage system consisting of Rb 2 Zn(NH 2 ) 4 -8LiH .…”

Section: Introductionmentioning

confidence: 99%

Effects of Metal Borohydrides on the Dehydrogenation Kinetics of the Li–Mg–N–H Hydrogen-Storage System

Liu

et al. 2023

J. Phys. Chem. C

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The combination of magnesium amide and lithium hydride represents a category of solid hydrogen-storage system with moderate hydrogen-storage conditions and good reversibility. At a molar ratio of 1:2 for the amide and hydride [Mg(NH 2 ) 2 -2LiH], the dehydrogenation kinetics of the system can be effectively accelerated by LiBH 4 . In this paper, the effects of kinetic enhancement were studied by doping the amide-hydride system at 1:2 molar ratio with NaBH 4 and Mg(BH 4 ) 2 along with LiBH 4 . Compared to the pristine system, the activation energies for the dehydrogenation were decreased by all three metal hydrides in the order of Mg(BH 4 ) 2 > LiBH 4 > NaBH 4 . The mechanism for the kinetic improvement of Mg(BH 4 ) 2 and NaBH 4 was investigated.

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Ternary amide-hydride system: A study on LiAl(NH2)4-LiAlH4 interaction

Cited by 8 publications

References 24 publications

Hydrogen storage in complex hydrides: past activities and new trends

Hydrogen storage in complex hydrides: past activities and new trends

Surfactant Induced Synthesis of LiAlH4 and NaAlH4 Nanoparticles for Hydrogen Storage

Effects of Metal Borohydrides on the Dehydrogenation Kinetics of the Li–Mg–N–H Hydrogen-Storage System

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