Lithium amidoborane hydrazinates: synthesis, structure and hydrogen storage properties

被引：9
作者：
He, Teng [1 ]
Wu, Hui [2 ,3 ]
Wu, Guotao [1 ]
Li, Zhao [1 ]
Zhou, Wei [2 ,3 ]
Ju, Xiaohua [1 ]
Xie, Dong [1 ]
Chen, Ping [1 ,4 ]
机构：
[1] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
[2] NIST, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA
[3] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA
[4] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY A | 2015年 / 3卷 / 18期
基金：
国家杰出青年科学基金; 中国国家自然科学基金;
关键词：
AMMONIA-BORANE DEHYDROGENATION; CRYSTAL-STRUCTURE; THERMAL-DECOMPOSITION; NEUTRON-DIFFRACTION; METAL AMIDOBORANES; RELEASE; ALKALI; AMIDOTRIHYDROBORATE; HYDRAZINIDOBORANE; CATALYSIS;
D O I：
10.1039/c5ta00985e
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The first metal amidoborane hydrazinate with a composition of LiNH2BH3 center dot NH2NH2 was successfully synthesized and characterized in the present study. LiNH2BH3 center dot NH2NH2 exhibits a monoclinic P2(1)/n space group with lattice parameters of a = 10.0650 angstrom, b = 6.3105 angstrom, c = 7.4850 angstrom, and beta = 107.497 degrees. Meanwhile, lithium amidoborane hydrazinates with different molar ratios of LiNH2BH3 (LiAB) and NH2NH2 were synthesized and characterized. It was found that 4LiAB-NH2NH2 can release 1.6 equiv. and 2.5 equiv. of H-2/LiAB at 75 degrees C and 170 degrees C, respectively. Therefore, around 7.1 wt% and 11.1 wt% of hydrogen can be released from 4LiAB-NH2NH2 at 75 degrees C and 170 degrees C, respectively, which are higher values than those for pristine LiAB. A dehydrogenation mechanism, which may be initiated by the "homogeneous dissociation" of N-N in hydrazine, is also proposed and discussed in this study.
引用
收藏
页码：10100 / 10106
页数：7
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