Carbon supported lithium hydride nanoparticles: Impact of preparation conditions on particle size and hydrogen sorption

Bramwell, Peter L.; Ngene, Peter; Jongh, Petra E. de

doi:10.1016/j.ijhydene.2016.10.062

Cited by 14 publications

(9 citation statements)

References 38 publications

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“…As such, MgBu2 takes up a large volume after the infiltration, and only one-tenth of this volume is converted to MgH2. This is similar to the utilisation of butyllithium for the direct synthesis of nanoconfined LiH, where loadings in the range of 12-17 wt % were obtained [29]. Secondly, MgH2 may have a tendency to block the pores and stop further infiltration, which may hamper the full infiltration of the smaller pores.…”

Section: Porosity Of the Nanoporous Scaffolds And Confinement Of Magnmentioning

confidence: 56%

Hydrogen Storage Stability of Nanoconfined MgH2 upon Cycling

et al. 2017

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It is of utmost importance to optimise and stabilise hydrogen storage capacity during multiple cycles of hydrogen release and uptake to realise a hydrogen-based energy system. Here, the direct solvent-based synthesis of magnesium hydride, MgH 2 , from dibutyl magnesium, MgBu 2 , in four different carbon aerogels with different porosities, i.e., pore sizes, 15 < D avg < 26 nm, surface area 800 < S BET < 2100 m 2 /g, and total pore volume, 1.3 < V tot < 2.5 cm 3 /g, is investigated. Three independent infiltrations of MgBu 2 , each with three individual hydrogenations, are conducted for each scaffold. The volumetric and gravimetric loading of MgH 2 is in the range 17 to 20 vol % and 24 to 40 wt %, which is only slightly larger as compared to the first infiltration assigned to the large difference in molar volume of MgH 2 and MgBu 2 . Despite the rigorous infiltration and sample preparation techniques, particular issues are highlighted relating to the presence of unwanted gaseous by-products, Mg/MgH 2 containment within the scaffold, and the purity of the carbon aerogel scaffold. The results presented provide a research path for future researchers to improve the nanoconfinement process for hydrogen storage applications.

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Section: Porosity Of the Nanoporous Scaffolds And Confinement Of Magnmentioning

confidence: 56%

Hydrogen Storage Stability of Nanoconfined MgH2 upon Cycling

et al. 2017

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“…More recently, Bramwell et al also reported the use of n-butyllithium to nanoconfine LiH within the porosity of a carbon xerogel but the high particle size distribution (from 2 nm to a few µm) led to hydrogen desorption ranging from 100 to 650 C. [80] Organoaluminium such as triethylaluminium are commonly used to generate Al films [81] through their thermal decomposition and the thermodynamic on the vaporisation of these compounds has been determined by Baev et al [82] However, organoaluminium compounds can also potentially be used to generate nanoparticles of AlH 3 assuming that their decomposition path is controlled. Early attempts to isolate unsolvated AlH 3 from organoaluminium failed.…”

Section: Thermal Decompositionmentioning

confidence: 99%

Rational Design of Nanosized Light Elements for Hydrogen Storage: Classes, Synthesis, Characterization, and Properties

Lai

Wang

Sun

et al. 2018

Adv Materials Technologies

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Hydrogen is often considered as a technology for the future owing to the limitations of current hydrogen storage materials in powering fuel cell vehicles. However, with the first hydrogen vehicles on the road and the need for better energy storage systems to back-up the increasing penetration of renewables, hydrogen based technologies will undoubtedly play an ever-increasing role in future energy schemes. To support the uptake of hydrogen, the challenge is to design better materials than This article is protected by copyright. All rights reserved. 2 the ones currently available. This means materials capable of reversible hydrogen uptake and release close to the ambient and with a storage capacity approaching 10 wt%. To date, materials with high hydrogen capacity are known but the lack of approaches to fully control the properties of these materials toward the targets for practical application still remains the drawback. In this context, the approach of particle size reduction or nanosizing has recently emerged as a potential mean to gain full control over the properties of high capacity hydride materials. This review aims to summarise current understanding toward the synthesis of nanomaterials and the potential of current knowledge to aid with the synthesis of nanosized hydrides with properties that could ultimately enable hydrogen storage at the ambient.

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“…Considering the drawbacks of both types of materials’ interactions with hydrogen, the combination of hydrogen storage materials operating on the principle of strong chemisorption with that of weak physisorption has been expected to result in the formation of composite materials with improved hydrogen storage properties merging the advantages of both types of interactions, such as low working pressure and fast kinetics. While a diverse combination of chemisorption‐physisorption composites has been prepared including metal‐carbon, complex metal hydride‐carbon, complex‐metal‐hydride‐MOF,, ammonia borane‐carbon, and ammonia borane‐MOF,, etc ., many of which have displayed synergistic effects arising from the composite formation, such as improved hydrogenation and dehydrogenation kinetics, simpler reaction mechanisms, improved recyclability and even catalytic effects. However, none of these have yet reached practical applications, often for cost‐related reasons, highlighting both challenges and advantages on the use of physical‐chemical hydride composites.…”

Section: Introductionmentioning

confidence: 99%

Interactions of Hydrogen with Pd@MOF Composites

2019

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Physisorption and chemisorption of hydrogen on solid-state materials are two fundamentally different interactions, both of which display advantages and drawbacks for hydrogen storage. It has been hypothesised that their combination by merging two classes of materials showing different sorption behaviour towards hydrogen in the same composite may synergistically combine their desirable properties. As representatives of such composites, palladium nanoparticles, nanoclusters, and single atoms have been encapsulated in a metal-organic framework matrix, embedded, or immobilised in its pores, respectively. In this minireview, we review advances on the understanding and potential applications of the combination of Pd with metalorganic framework matrices through the analysis of the nanocomposite materials' interaction with hydrogen and sorption properties.[a] Dr.

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Carbon supported lithium hydride nanoparticles: Impact of preparation conditions on particle size and hydrogen sorption

Cited by 14 publications

References 38 publications

Hydrogen Storage Stability of Nanoconfined MgH2 upon Cycling

Hydrogen Storage Stability of Nanoconfined MgH2 upon Cycling

Rational Design of Nanosized Light Elements for Hydrogen Storage: Classes, Synthesis, Characterization, and Properties

Interactions of Hydrogen with Pd@MOF Composites

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