Calcium Amidoborane Ammoniate-Synthesis, Structure, and Hydrogen Storage Properties

被引：77

作者：

Chua, Yong Shen ^{[2
]}

Wu, Guotao ^{[1
]}

Xiong, Zhitao ^{[1
]}

He, Teng ^{[1
]}

Chen, Ping ^{[1
]}

机构：

[1] Dalian Inst Chem Phys, Dalian 116023, Peoples R China

[2] Natl Univ Singapore, Dept Chem, Singapore 117542, Singapore

来源：

CHEMISTRY OF MATERIALS | 2009年 / 21卷 / 20期

关键词：

THERMAL-DECOMPOSITION; CRYSTAL-STRUCTURES; LITHIUM HYDRIDE; BORANE; ALKALI;

D O I：

10.1021/cm9020222

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：

A new type of hydrogen storage material-namely, calcium amidoborane ammoniate (Ca(NH2BH3)(2)center dot 2NH(3))-is synthesized by reacting calcium amide and ammonia borane in a molar ratio of 1:2. Structural analyses show that this newly developed complex has a orthorhombic structure (space group Pna21) with unit-cell parameters of a = 18.673(3) angstrom, b = 5.2283(8) angstrom, c 8.5748(12) angstrom, and V = 873.16(22) angstrom(3). The presence of NH3 in the crystal lattice facilitates the formation of dihydrogen bonding between BH center dot center dot center dot HN, which is considerably shorter than that in calcium amidoborane (Ca(NH2BH3)(2)). As a consequence, the bond lengths of B-H and N-H are increased comparatively. Our experimental results show that more than 8 wt % hydrogen can be released from Ca(NH2BH3)(2)center dot 2NH(3) without borazine emission at 150 degrees C.

引用

页码：4899 / 4904

页数：6

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