Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 499, Issue 2, Pages 144-148Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2010.03.182
Keywords
Hydrogen storage materials; Amidoboranes; Yttrium
Categories
Funding
- EU [MRTNCT-2006-032474]
- Polish Ministry of Science and Higher Education [37/6PR UE/2007/7]
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Alkali and alkaline-earth metal amidoboranes constitute a new class of inorganic hydrogen storage materials containing distinct [NH2BH3](-) units. Here we have attempted synthesis of one of the lightest among M(III) amidoboranes, Y(NH2BH3)(3), with its high nominal hydrogen content of 8.4 wt.%, using few different routes. Polycrystalline Y(NH2BH3)(3), successfully obtained via mechanochemical synthesis utilizing LiNH2BH3 and YCl3, has been subject to structural and spectroscopic investigations as well as studies of thermal decomposition. Y(NH2BH3)(3) crystallizes monoclinic (C2/c) with a = 13.18902(63)angstrom, b = 7.82233(38)angstrom, c = 14.874274(68) angstrom, beta=92.42620(40)degrees (Z=8, V=1533.19(13) angstrom(3)). The title compound is quite unstable at ambient conditions and it spontaneously decomposes within several days. When heated up in argon, it exothermally emits hydrogen contaminated with significant amount of ammonia, in the 50-250 degrees C temperature range. (C) 2010 Elsevier B.V. All rights reserved.
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