Synthesis and Thermal Decomposition Behaviors of Magnesium Borohydride Ammoniates with Controllable Composition as Hydrogen Storage Materials

被引：56

作者：

Yang, Yanjing ^{[1
,2
]}

Liu, Yongfeng ^{[1
,2
]}

Li, You ^{[1
,2
]}

Gao, Mingxia ^{[1
,2
]}

Pan, Hongge ^{[1
,2
]}

机构：

[1] Zhejiang Univ, State Key Lab Silicon Mat, Key Lab Adv Mat & Applicat Batteries Zhejiang Pro, Hangzhou 310027, Peoples R China

[2] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Peoples R China

来源：

CHEMISTRY-AN ASIAN JOURNAL | 2013年 / 8卷 / 02期

基金：

中国国家自然科学基金;

关键词：

ammonia redistribution; ammoniates; ball milling; borohydrides; hydrogen storage; LITHIUM BOROHYDRIDE; COMPLEX HYDRIDES; SYSTEM; MONOAMMONIATE; TEMPERATURE; RELEASE; IMIDES;

D O I：

10.1002/asia.201200970

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An ammonia-redistribution strategy for synthesizing metal borohydride ammoniates with controllable coordination number of NH3 was proposed, and a series of magnesium borohydride ammoniates were easily synthesized by a mechanochemical reaction between Mg(BH4)2 and its hexaammoniate. A strong dependence of the dehydrogenation temperature and purity of the released hydrogen upon heating on the coordination number of NH3 was elaborated for Mg(BH4)2 center dot x?NH3 owing to the change in the molar ratio of Hd+ and Hd-, the charge distribution on Hd+ and Hd-, and the strength of the coordinate bond N:-> Mg2+. The monoammoniate of magnesium borohydride (Mg(BH4)2 center dot NH3) was obtained for the first time. It can release 6.5?% pure hydrogen within 50 minutes at 180 degrees C.

引用

页码：476 / 481

页数：6

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