Subject Area物理化学
synthesis of alkali amidoborane (MNH2BH3)for hydrogen storage
Xiong ZT(熊智涛); Wu GT(吴国涛); Chen P(陈萍); Ping Chen
Conference Name138th annual meeting & exhibition of The Minerals, Metals & Materials Society
Conference Date2009-2-15
Conference Place美国
Funding Organization矿物,金属及材料学会
AbstractHolding 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.
Document Type会议论文
Corresponding AuthorPing Chen
Recommended Citation
GB/T 7714
Xiong ZT,Wu GT,Chen P,et al. synthesis of alkali amidoborane (MNH2BH3)for hydrogen storage[C],2009:203/1.
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