Effect of zeolites on thermal decomposition of ammonia borane

Gangal, Aneesh C.; Edla, Raju; Iyer, Kartik S.; Biniwale, Rajesh B.; Vashistha, M.; Sharma, Pratibha

doi:10.1016/j.ijhydene.2011.04.011

Cited by 29 publications

(12 citation statements)

References 23 publications

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“…Heldebrant et al [140] demonstrated that the chemical additive has an effect on reducing or even suppressing the induction period (disruption of the H d+ Á Á Á H dÀ bonds between adjacent NH 3 BH 3 ) that precedes the nucleation (formation of the reaction intermediate [BH 2 (NH 3 ) 2 ][BH 4 ]) and growth (H 2 release through dehydrocoupling) steps. Typical examples are mesoporous carbon CMK-3 [143], polymethyl acrylate Boron-based hydrolytic and thermolytic hydrides G. Moussa et al [144], magnesium metal organic framework 74 [145], boron nitride [146], and zeolite X [147]. When NH 3 BH 3 is nanoconfined into the mesoporous silica SBA-15, it decomposes at lower temperatures, with higher kinetics and without the emission of B 3 N 3 H 6 .…”

Section: Nh 3 Bhmentioning

confidence: 99%

Boron-based hydrides for chemical hydrogen storage

Moussa

Moury

Demirci

et al. 2013

Int. J. Energy Res.

141

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SUMMARY The development of the hydrogen economy is hampered by many issues connected with production, storage, distribution, and end‐use. Although the hydrogen storage problem is particularly difficult, there are several attractive solutions under investigation, and chemical hydrogen storage (involving hydrogen‐rich materials) has shown much promising properties. The boron‐based materials are typical examples. They have high hydrogen densities, with up to four reactive B − H bonds. Most of the works have focused on dehydrogenation by hydrolysis or thermolysis so that it takes place in high extent in mild conditions. The first materials studied have been lithium borohydride, sodium borohydride, and ammonia borane. However, their development has been hindered by technical issues such as very high dehydrogenation temperatures, incomplete reaction, and purity of the produced hydrogen. To get round such problems, new materials have been proposed since the mid‐2000s. Interestingly, those materials present attractive attributes, but also drawbacks. This is illustrated in the present review. We believe that boron‐based hydrides have a significant potential in chemical hydrogen storage, but their implementation depends on the recyclability of the solid by‐products; this seems to be the key factor. Copyright © 2013 John Wiley & Sons, Ltd.

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Section: Nh 3 Bhmentioning

confidence: 99%

Boron-based hydrides for chemical hydrogen storage

Moussa

Moury

Demirci

et al. 2013

Int. J. Energy Res.

141

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“…TheT Ga nd the MS results may be further exploited to estimate the storage capacity of confined AB.T aking into accountt he weight losses measureda t8 0 and 100 8Ca nd considering only the quantity of AB confined in the BN samples (196 mg in the mBN1000 samplea nd 192 mg in the mBN1450 sample), one can suggest an effective gravimetric hydrogen storage capacity of 6.9 (AB@mBN1000)a nd 3.7 (AB@mBN1450)w t% at 80 8Ca nd 8.1 (AB@mBN1000)a nd 7.3 (AB@mBN1450)w t% at 100 8C. Thesef indings allow us to propose ap romising candidate for the dehydrogenation of boron-nitrogen-hydrogen compounds.Unlikem ost of the scaffolds reported so far, [12][13][14][15][16][17][18][19][20][21][22] the mBN1450 sampleo ffers three advantages:i ti sm onolithic andi sm uch easier to handle than the powdery host materials;t he dehydrogenation of AB starts above 25 8C, which is importantf rom as tability pointo fv iew at ambient conditions;a nd the released H 2 is pure,n ot "polluted" by unwanted by-products such as ammoniao rb orazine.T his work paves the way for monolithic supports with higher SSA, significant pore volumes,a nd that offer better effectives torage capacities with the confined AB.…”

Section: Resultsmentioning

confidence: 99%

“…[13] Since this pioneering work, variousn anoscaffolds have been reported and are mainly based on carbon and silica. [14][15][16][17][18][19][20][21][22] Thed estabilization of AB is generally explained by two phenomena. Thef irst is the nanosizing of the hydride particles;t his results in defects ites that initiate the dehydropolymerizationo fA Ba tl ower temperatures.…”

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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“…Subsequently, several other porous hosts were tested. Typical examples are mesoporous carbon CMK-3 [27], polymethyl acrylate (PMA) [28], carbon nanotubes [29], magnesium metal organic framework 74 [30], and zeolite X [31]. For example, Zhao et al [28] showed by TPD/MS that the PMA-confined AB liberates BZ-free H 2 , at lower temperature (onset of 70 C) than AB (90 C); the dehydrogenation was found to be a one-step process with a peak centered at ca.…”

Section: Introductionmentioning

confidence: 99%