Promoted hydrogen release from ammonia borane by mechanically milling with magnesium hydride: a new destabilizing approach

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	Promoted hydrogen release from ammonia borane by mechanically milling with magnesium hydride: a new destabilizing approach
	X. D. Kang; L. P. Ma; Z. Z. Fang; L. L. Gao; J. H. Luo; S. C. Wang; P. Wang
	2009
发表期刊	Physical Chemistry Chemical Physics
ISSN	1463-9076
卷号	11 期号:14 页码:2507-2513
摘要	Ammonia borane (NH(3)BH(3), AB) is an intriguing molecular crystal with an extremely high hydrogen capacity and moderate thermal stability. In the present study, we show a simple but effective approach for destabilizing AB for promoted hydrogen release at moderate temperatures. It is found that mechanically milling with magnesium hydride (MgH(2)) can dramatically improve the dehydrogenation properties of AB, on both the kinetic and thermochemical aspects. For the mechanically milled AB/0.5MgH(2) material, over 8 wt% hydrogen can be released from AB within 4 h at around 100 degrees C without undesired volatile by-products. Moreover, the dehydrogenation reaction of the AB/0.5MgH(2) sample becomes significantly less exothermic than that of neat AB. In situ X-ray diffraction results demonstrate that the MgH(2) additive well maintains its phase stability during the ball-milling and the subsequent heating processes. Meanwhile, Raman spectroscopy and in situ (11)B NMR studies show that the MgH(2) additive exerts considerable influence on the chemical bonding state and decomposition process/products of AB. Combined phase/structure analyses results suggest that MgH(2) exerts effect via developing solid phase interaction with AB.
部门归属	[kang, xiangdong; ma, laipeng; fang, zhanzhao; gao, lili; luo, junhong; wang, sucheng; wang, ping] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;wang, p (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;pingwang@imr.ac.cn
关键词	N-h Compounds Thermal-decomposition Catalyzed Dehydrogenation Storage Material Room-temperature Lithium Hydride Generation Mgh2 Dissociation Aminoborane
URL	查看原文
WOS记录号	WOS:000264640100020
引用统计	被引频次：63[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32002
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. D. Kang,L. P. Ma,Z. Z. Fang,et al. Promoted hydrogen release from ammonia borane by mechanically milling with magnesium hydride: a new destabilizing approach[J]. Physical Chemistry Chemical Physics,2009,11(14):2507-2513.
APA	X. D. Kang.,L. P. Ma.,Z. Z. Fang.,L. L. Gao.,J. H. Luo.,...&P. Wang.(2009).Promoted hydrogen release from ammonia borane by mechanically milling with magnesium hydride: a new destabilizing approach.Physical Chemistry Chemical Physics,11(14),2507-2513.
MLA	X. D. Kang,et al."Promoted hydrogen release from ammonia borane by mechanically milling with magnesium hydride: a new destabilizing approach".Physical Chemistry Chemical Physics 11.14(2009):2507-2513.