Renewed Insight into the Promoting Mechanism of Magnesium Hydride on Ammonia Borane

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	Renewed Insight into the Promoting Mechanism of Magnesium Hydride on Ammonia Borane
	J. H. Luo; X. D. Kang; P. Wang
	2010
发表期刊	Chemphyschem
ISSN	1439-4235
卷号	11 期号:10 页码:2152-2157
摘要	Our previous study found that mechanically milling with magnesium hydride (MgH(2)) could dramatically improve the dehydrogenation property of ammonia borane (AB). Meanwhile, it appears that the MgH(2) additive maintains its phase stability in the milling and subsequent heating process. In an effort to further the mechanistic understanding of the AB/MgH(2) system, we reinvestigated the property and structure evolution in the hydrogen release process of the AB/0.5MgH(2) sample. Property examination using volumetric method and synchronous thermal analyses showed that the AB/0.5MgH(2) sample releases similar to 13.8 wt% hydrogen after being heated at 300 degrees C. This hydrogen amount is in excess of that available from AB, indicative of the participation of a faction of MgH(2) in the dehydrogenation process of AB. Structural and chemical state analyses using Fourier transformation infrared spectroscopy and solid-state (11)B nuclear magnetic resonance techniques further showed that part of MgH(2) participates in the dehydrogenation process of AB from the first step, resulting in the formation of Mg-B-N-H intermediate species. The incorporation of Mg in AB is believed to be a crucial event leading to dehydrogenation property improvements, particularly for the release of the last equivalent of H(2) in AB at relatively moderate temperature. These findings have provided renewed insight into the promoting mechanism of MgH(2) on the hydrogen release from AB.
部门归属	[luo, junhong; kang, xiangdong; wang, ping] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;luo, jh (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;pingwang@imrac.cn
关键词	Activation Ammonia Borane Dehydrogenation Hydrides Hydrogen Storage Chemical Hydrogen Storage Thermal-decomposition Boron-nitride Catalyzed Dehydrogenation Room-temperature Generation Release Lithium Amidoboranes Dissociation
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WOS记录号	WOS:000280428400018
引用统计	被引频次：19[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/321006/31354
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. H. Luo,X. D. Kang,P. Wang. Renewed Insight into the Promoting Mechanism of Magnesium Hydride on Ammonia Borane[J]. Chemphyschem,2010,11(10):2152-2157.
APA	J. H. Luo,X. D. Kang,&P. Wang.(2010).Renewed Insight into the Promoting Mechanism of Magnesium Hydride on Ammonia Borane.Chemphyschem,11(10),2152-2157.
MLA	J. H. Luo,et al."Renewed Insight into the Promoting Mechanism of Magnesium Hydride on Ammonia Borane".Chemphyschem 11.10(2010):2152-2157.