A simple and efficient approach to synthesize amidoborane ammoniates: case study for Mg(NH2BH3)(2)(NH3)(3) with unusual coordination structure

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	A simple and efficient approach to synthesize amidoborane ammoniates: case study for Mg(NH2BH3)(2)(NH3)(3) with unusual coordination structure
	X. D. Kang; H. Wu; J. H. Luo; W. Zhou; P. Wang
	2012
发表期刊	Journal of Materials Chemistry
ISSN	0959-9428
卷号	22 期号:26 页码:13174-13179
摘要	Metal amidoborane ammoniates are a new type of promising hydrogen storage material consisting of metal cation, [NH2BH3](-) anionic unit and NH3 ligand. Herein, we report a new reactive ball milling approach for preparation of magnesium amidoborane ammoniate, Mg(NH2BH3)(2)(NH3)(3). Our study found that mechanically milling the NH3BH3-MgH2 mixture in a 2 : 1 molar ratio under NH3 atmosphere can readily produce Mg(NH2BH3)(2)(NH3)(3). Its crystal structure was successfully determined by a combination of X-ray diffraction (XRD) analysis and first-principles calculations. This compound possesses a novel ordered structure with alternating layers of Mg(NH3)(6)(2+) hexamminemagnesium cations and Mg(NH2BH3)(4)(2-) complex anions, in which Mg2+ exhibits both VI and IV coordinations. Property measurements found that Mg(NH2BH3)(2)(NH3)(3) can release 7 equivalents (10.6 wt%) of H-2 upon heating to 300 degrees C in a closed system. A combination of XRD, Fourier transformation infrared spectroscopy (FTIR), and solid-state B-11 MAS NMR techniques has been employed to characterize Mg(NH2BH3)(2)(NH3)(3) and its dehydrogenation product. A series of control experiments have also been conducted to gain insight into the formation mechanism of Mg(NH2BH3)(2)(NH3)(3).
部门归属	[wu, hui; zhou, wei] natl inst stand & technol, nist ctr neutron res, gaithersburg, md 20899 usa. [kang, xiangdong; luo, junhong; wang, ping] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [wu, hui; zhou, wei] univ maryland, dept mat sci & engn, college pk, md 20742 usa.;wu, h (reprint author), natl inst stand & technol, nist ctr neutron res, gaithersburg, md 20899 usa.;huiwu@nist.gov; pingwang@imr.ac.cn
关键词	Hydrogen Storage Properties Thermal-decomposition Crystal-structure Borane Release Dehydrogenation Lithium Hydride
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60031
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. D. Kang,H. Wu,J. H. Luo,et al. A simple and efficient approach to synthesize amidoborane ammoniates: case study for Mg(NH2BH3)(2)(NH3)(3) with unusual coordination structure[J]. Journal of Materials Chemistry,2012,22(26):13174-13179.
APA	X. D. Kang,H. Wu,J. H. Luo,W. Zhou,&P. Wang.(2012).A simple and efficient approach to synthesize amidoborane ammoniates: case study for Mg(NH2BH3)(2)(NH3)(3) with unusual coordination structure.Journal of Materials Chemistry,22(26),13174-13179.
MLA	X. D. Kang,et al."A simple and efficient approach to synthesize amidoborane ammoniates: case study for Mg(NH2BH3)(2)(NH3)(3) with unusual coordination structure".Journal of Materials Chemistry 22.26(2012):13174-13179.