期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 120, 期 16, 页码 8428-8435出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.6b00209
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资金
- Belgian Fonds National pour la recherche Scientifique (FNRS)
- Fonds pour la Formation a la recherche en Industrie et en Agriculture (FRIA)
- Danish National Research Foundation, Center for Materials Crystallography [DNRF93]
- Innovation Fund Denmark (project HyFill-Fast)
- Danish Research Council for Nature and Universe (Danscatt)
- Swiss National Science Foundation
Two reactive hydride composite systems, Ca(BH4)(2)-NaNH2 and Mg(BH4)(2)-NaNH2, were systematically studied by in situ synchrotron radiation powder diffraction, in situ Fourier transform infrared spectroscopy, thermogravimetric analysis, and differential scanning calorimetry coupled with mass spectrometry. Metathesis reactions between the amides and borohydrides take place in both systems between 100 and 150 degrees C yielding amorphous materials with the proposed composition M(BH4)(NH2). Simultaneously, a fraction of NaNH2 decomposes to Na3N and ammonia via a complex pathway. The main gas released under 300 degrees C is ammonia for both systems, while significant amounts of hydrogen are released only above 350 degrees C.
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