High-capacity hydrogen storage in lithium and sodium amidoboranes
The safe and efficient storage of hydrogen is widely recognized as one of the key technological challenges in the transition towards a hydrogen-based energy economy 1 , 2 . Whereas hydrogen for transportation applications is currently stored using cryogenics or high pressure, there is substantial re...
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Veröffentlicht in: | Nature Materials, 7(2):138-141 7(2):138-141, 2008-02, Vol.7 (2), p.138-141 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The safe and efficient storage of hydrogen is widely recognized as one of the key technological challenges in the transition towards a hydrogen-based energy economy
1
,
2
. Whereas hydrogen for transportation applications is currently stored using cryogenics or high pressure, there is substantial research and development activity in the use of novel condensed-phase hydride materials. However, the multiple-target criteria accepted as necessary for the successful implementation of such stores have not yet been met by any single material. Ammonia borane, NH
3
BH
3
, is one of a number of condensed-phase compounds that have received significant attention because of its reported release of ∼12 wt% hydrogen at moderate temperatures (∼150
∘
C). However, the hydrogen purity suffers from the release of trace quantities of borazine. Here, we report that the related alkali-metal amidoboranes, LiNH
2
BH
3
and NaNH
2
BH
3
, release ∼10.9 wt% and ∼7.5 wt% hydrogen, respectively, at significantly lower temperatures (∼90
∘
C) with no borazine emission. The low-temperature release of a large amount of hydrogen is significant and provides the potential to fulfil many of the principal criteria required for an on-board hydrogen store. |
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ISSN: | 1476-1122 1476-4660 |
DOI: | 10.1038/nmat2081 |