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学科主题: 物理化学
题名: synthesis of alkali amidoborane (MNH2BH3)for hydrogen storage
作者: Xiong ZT(熊智涛) ;  Wu GT(吴国涛) ;  Chen P(陈萍)
会议名称: 138th annual meeting & exhibition of The Minerals, Metals & Materials Society
会议日期: 2009-2-15
出版日期: 2009-02-15
会议地点: 美国
通讯作者: Ping Chen
部门归属: 一室九室
主办者: 矿物,金属及材料学会
摘要: Holding a hydrogen capacity of 19.6wt%, ammonia borane (NH3BH3) shows potential to be a hydrogen storage material. Though considerable amount of hydrogen evolves from NH3BH3, its decomposition also generates borazine, a volatile product highly poisoning to PEM fuel cell. In addition, relatively high kinetic barrier in dehydrogenation of this chemical hinders the release of hydrogen at acceptably low temperatures. Our recent effort in modifying NH3BH3 by replacing one of its H with alkali metal successfully produced lithium amidoborane (LiNH2BH3) and NaNH2BH3. TPD and volumetric release showed amidoboranes evolved 2 equiv. H2 in two steps; a burst was observed around 90C and a broad TPD signal centralized at 150C. Borazine was undetectable. DSC indicated mild exothermic nature of that burst and the second dehydrogenation process was nearly thermal neutral. Therefore, isothermally heating LiNH2BH3 and NaNH2BH3 at 91°C for 19h resulted in the evolution of 10.7wt% and 7.4wt% hydrogen, respectively.
语种: 中文
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/113484
Appears in Collections:中国科学院大连化学物理研究所_会议论文

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Recommended Citation:
Xiong ZT,Wu GT,Chen P. synthesis of alkali amidoborane (MNH2BH3)for hydrogen storage[C]. 见:138th annual meeting & exhibition of The Minerals, Metals & Materials Society. 美国. 2009-2-15.
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