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Ammonia borane-metal alanate composites : hydrogen desorption properties and decomposition processes
| 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) |
| URI: | http://hdl.handle.net/2115/58504 |
| Appears in Collections: | 創成研究機構 (Creative Research Institution) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 礒部 繁人
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