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：

中国国家自然科学基金; 国家杰出青年科学基金;

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

页码：10100 / 10106

页数：7

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