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题名: Structure and Hydrogen Storage Properties of Calcium Borohydride Diammoniate
作者: Chu, Hailiang1;  Wu, Guotao1;  Xiong, Zhitao1;  Guo, Jianping1;  He, Teng1;  Chen, Ping1
通讯作者: 陈萍
刊名: CHEMISTRY OF MATERIALS
发表日期: 2010-11-09
DOI: 10.1021/cm1023234
卷: 22, 期:21, 页:6021-6028
收录类别: SCI
文章类型: Article
部门归属: 19
项目归属: 1901
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Materials Science
英文摘要: A new type of hydrogen storage material namely, calcium borohydride diammoniate (Ca(BH4)(2)center dot 2NH(3)), is synthesized by reacting calcium borohydride and 2 equiv of ammonia. Structural analyses show that this complex has an orthorhombic structure (space group Pbcn) with unit-cell parameters of a = 6.4160 angstrom, b = 8.3900 angstrom, c = 12.7020 angstrom, and V = 683.75 angstrom(3), in which Ca2+ coordinates with four -BH4 groups two -NH3 groups. The presence of NH3 in the crystal lattice facilitates the formation of B-H center dot center dot center dot H-N dihydrogen bonding. As a consequence, the bond lengths of B-H and N-H arc increased with comparison to Ca(BH4)(2) and NH3, respectively. Our experimental results show that more than 11.3 wt % hydrogen can be released exothermically from Ca(BH4)(2)center dot 2NH(3) in a closed vessel at a temperature as low as 250 degrees C.
关键词[WOS]: WELL-CRYSTALLIZED MG(BH4)(2) ;  MAGNESIUM BOROHYDRIDE ;  NEUTRON-DIFFRACTION ;  REVERSIBILITY ;  CA(BH4)(2) ;  LIBH4 ;  DEHYDROGENATION ;  RELEASE ;  DYNAMICS ;  METALS
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000283623700029
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/103463
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Chu, Hailiang,Wu, Guotao,Xiong, Zhitao,et al. Structure and Hydrogen Storage Properties of Calcium Borohydride Diammoniate[J]. CHEMISTRY OF MATERIALS,2010,22(21):6021-6028.
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