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Ammonia borane-metal alanate composites : hydrogen desorption properties and decomposition processes

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Title: Ammonia borane-metal alanate composites : hydrogen desorption properties and decomposition processes
Authors: Nakagawa, Yuki Browse this author
Ikarashi, Yudai Browse this author
Isobe, Shigehito Browse this author →KAKEN DB
Hino, Satoshi Browse this author
Ohnuki, Somei Browse this author →KAKEN DB
Issue Date: 2014
Publisher: Royal Society of Chemistry
Journal Title: RSC Advances
Volume: 4
Issue: 40
Start Page: 20626
End Page: 20631
Publisher DOI: 10.1039/c4ra02476a
Abstract: Hydrogen desorption properties and decomposition processes of NH3BH3-MAlH4 (M = Na, Li) composites were investigated by using thermogravimetry-differential thermal analysis-mass spectrometry (TG-DTA-MS), powder X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analyses. We prepared the composites by ball-milling and the mixtures by hand-milling. The ball-milled composites desorbed 4-5 wt% hydrogen at three exothermic steps below 260 degrees C. The emissions of by-product gases, NH3, B2H6 and B3H6N3, were effectively suppressed. From XRD analysis, the formation of a mixed-metal (Na(Li), Al) amidoborane phase was suggested. Very different results were obtained using hand-milling. They showed only one exothermic reaction at 80-90 degrees C. The emission of by-product gases was not suppressed. By comparing the differences between ball-milled composites and hand-milled mixtures, the importance of mixed-metal amidoborane in this system was proposed.
Type: article (author version)
Appears in Collections:創成研究機構 (Creative Research Institution) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 礒部 繁人

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