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学科主题: 物理化学
题名: Alkali Amidoboranes for Hydrogen Storage
作者: Chen P(陈萍)
会议名称: The Australia-China Symposium on Nanomaterials for clean energy
会议日期: 2010-5-27
出版日期: 2010-05-27
会议地点: 澳大利亚
通讯作者: 陈萍
部门归属: 一室九室
主办者: University of Queensland
摘要: The demand for high capacity on-board hydrogen storage systems for hydrogen fuel cell vehicles has stimulated tremendous efforts in materials research and development. Recent research efforts have focused on materials that are composed of hydrogen bound to light elements including borohydrides, MOFs, amide-hydride combination systems,1 and ammonia borane.2-3 With a hydrogen capacity of 19.6 wt.%, ammonia borane (NH3BH3, AB in short) shows promise for hydrogen storage, however, decomposition gives a volatile side product, borazine, that will poison PEM fuel cells. In addition, the desorption of hydrogen from this chemical hydride has a sufficient barrier to render the kinetics too slow at temperatures below 80 C. Our recent effort to modify the kinetics and thermodynamics of H2 release from AB by replacing one H with an alkali metal, i.e., alkali amidoboranes (MNH2BH3, M = Li and Na) provided some improvement.4 These amidoboranes release large amount of hydrogen (exp. 10.9 wt.%) with no measurable borazine formation, however, the kinetics for H2 desorption are still insufficient. Previous investigations on hydrogen release from complex hydrides revealed that mass transport or mobility of the reacting species is one of the kinetic controlling factors. The mobility of the species can be enhanced substantially upon dissolution in a solvent. Here we investigate the reactivity of AB dissolved in tetrahydrofuran (THF) with a suspension of LiH and observe the formation of LiNH2BH3 and enhanced reaction kinetics with an interesting dependence on AB concentration. More than 2.8 equiv of hydrogen can be released in two steps at a temperature as low as 40 C.
语种: 中文
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/114406
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:
Chen P. Alkali Amidoboranes for Hydrogen Storage[C]. 见:The Australia-China Symposium on Nanomaterials for clean energy. 澳大利亚. 2010-5-27.
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