Room-temperature hydrogen release from activated carbon-confined ammonia borane

Moussa, Georges; Bernard, Samuel; Demirci, Umit B.; Chiriac, Rodica; Miele, Philippe

doi:10.1016/j.ijhydene.2012.06.086

Cited by 61 publications

(49 citation statements)

References 46 publications

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“…Over the past decade, this compound has attracted considerable attention as a portable hydrogen storage material, according to its high gravimetric hydrogen contents (ca. 20% by weight for AB) [22][23][24][25][26][27]. A very pertinent review dedicated to this compound and related derivatives as dihydrogen sources has been proposed by Staubitz et al in 2010 [27].…”

Section: Introductionmentioning

confidence: 99%

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Nanostructured and architectured boron nitride from boron, nitrogen and hydrogen-containing molecular and polymeric precursors

Bernard

Miele

2014

Materials Today

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The controlled synthesis of boron nitride at the nanoscale with predefined and uniform nanostructures and architectures is in general a big challenge, and making full use of these materials in applications still requires great effort. In this article, recent progress on the synthesis of nanostructured and architectured boron nitride involving molecular and polymeric precursors which contain only boron, nitrogen and hydrogen are reviewed. The potential applications of these materials with controlled porosity and/or dimensions controlled at the nanoscale as zero, one, two and three dimensional materials are discussed. Finally, future prospects for boron nitride in terms of synthesis and applications are considered.

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Section: Introductionmentioning

confidence: 99%

“…2) forming liquid (borazine) and solid (polyamino-/ iminoboranes and polyborazylene) intermediates which are also considered as BN precursors in the next sections [23,[28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Nanostructured and architectured boron nitride from boron, nitrogen and hydrogen-containing molecular and polymeric precursors

Bernard

Miele

2014

Materials Today

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“…In this case, the destabilization of AB was proposed to derive from acid–base reactions between the H δ − in the AB ‐BH 3 group and H δ + from O‐H and COO‐H groups on the surface of the carbon host. A similar destabilization mechanism was proposed for AB confined in an activated carbon composite, although this composite was unstable under ambient conditions …”

Section: Resultsmentioning

confidence: 86%

Ammonia Borane Based Nanocomposites as Solid‐State Hydrogen Stores for Portable Power Applications

et al. 2018

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Ammonia borane (AB) based nanocomposites are studied with the aim of developing a promising solid‐state hydrogen store that complies with the requirements of a modular polymer electrolyte membrane fuel cell (PEM FC) in a portable power pack system. AB‐carbon nanocomposites (prepared via ball milling or solution‐impregnation) demonstrate improved hydrogen release performance compared to AB itself in terms of onset temperature and hydrogen purity, while maintaining a gravimetric density of more than 5 wt. % H2. The most promising of these materials is an AB‐AC (activated carbon) composite, synthesized via solution impregnation with an optimal dehydrogenation temperature of 96 °C. When combined with an external nickel chloride filter downstream, no evolved gaseous by‐products can be detected above 100 ppb. The feasibility of an AB‐AC storage tank is further investigated using simulations in which the reaction rate and the hydrogen flux is found to be nearly constant as the temperature front propagated from the bottom to the top of the tank after initiation.

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“…The second is associated with H δ+ ⋅⋅⋅H δ− surface interactions, with H δ− of the BH 3 moiety of AB and H δ+ belonging to surface/terminal hydroxyl groups (‐ O ‐H) that are generally found on carbonaceous or oxide nanoscaffolds. Such acid–base interactions enhance H 2 release but usually lead to an unstable material under standard room conditions . One of the strategies should therefore be to focus on nanoscaffolds that are free of reactive surface groups while only considering nanoconfinement.…”

Section: Introductionmentioning

confidence: 99%

Robust 3D Boron Nitride Nanoscaffolds for Remarkable Hydrogen Storage Capacity from Ammonia Borane

et al. 2018

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Mesoporous monolithic (3D) boron nitride (BN) structures are synthesized using a template‐assisted polymer‐derived ceramic route. Polyborazylene is selected to impregnate monolithic activated carbon, which is used as template. After pyrolysis and template removal, this method supplies BN compounds with controlled crystallinity and tunable textural properties controlled by the temperature at which they have been annealed (from 1000 to 1450 °C). Monoliths with an interconnected mesoporous network, high specific surface areas from 584 to 728 m2 g−1, significant pore volumes from 0.75 to 0.93 cm3 g−1, and a relatively high compressive strength are generated. These highly porous compounds are used as nanoscaffolds to confine ammonia borane (AB). The composites provide an effective gravimetric hydrogen capacity of up to 8.1 wt %, based on AB measured at 100 °C; this value demonstrates the high potential of this system as a safe potential hydrogen storage material.

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Room-temperature hydrogen release from activated carbon-confined ammonia borane

Cited by 61 publications

References 46 publications

Nanostructured and architectured boron nitride from boron, nitrogen and hydrogen-containing molecular and polymeric precursors

Nanostructured and architectured boron nitride from boron, nitrogen and hydrogen-containing molecular and polymeric precursors

Ammonia Borane Based Nanocomposites as Solid‐State Hydrogen Stores for Portable Power Applications

Robust 3D Boron Nitride Nanoscaffolds for Remarkable Hydrogen Storage Capacity from Ammonia Borane

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