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

Nakagawa, Yuki; Ikarashi, Yudai; Isobe, Shigehito et al.

RSC Advances, 2014, 4(40), 20626-20631

Permalink : https://hdl.handle.net/2115/58504

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アクセス権
open access
URI
https://hdl.handle.net/2115/58504
タイトル
Ammonia borane-metal alanate composites : hydrogen desorption properties and decomposition processes
著者
Nakagawa, Yuki ; Ikarashi, Yudai ; Isobe, Shigehito ; Hino, Satoshi ; Ohnuki, Somei
著者名
Nakagawa, Yuki
著者名
Ikarashi, Yudai
e-Rad_Researcher
10564370
著者名
Isobe, Shigehito
著者名
Hino, Satoshi
e-Rad_Researcher
10142697
著者名
Ohnuki, Somei
言語
英語
発行日
2014
出版者
Royal Society of Chemistry
収録物名
RSC Advances
巻(号)
4(40)
ページ
20626-20631
抄録
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.
資源タイプ
学術雑誌論文
出版タイプ
Accepted Manuscript
PISSN
2046-2069
関連情報 (isVersionOf)
出版社版DOI
https://doi.org/10.1039/c4ra02476a