Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 509, Issue -, Pages S654-S657Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2010.10.010
Keywords
Metal hydride; Hydrogen storage material; Titanium catalyst; X-ray diffraction; Quinuclidine; Aluminum hydride
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Aluminum hydride is a material that is well known for its high gravimetric and volumetric hydrogen densities and thus is an attractive hydrogen storage compound; however, it is thermodynamically unstable at room temperature requiring 7 x 10(3) bar pressure to reform the hydride from Al and H(2). An alternate method of AlH(3) formation is possible using a reversible organometallic synthesis employing catalyzed Al powder, H(2), and quinuclidine, or another tertiary amine, as an intermediate step. Additionally, many tertiary amines are known to react directly with AlH(3) to form adducts. Previous work indicates that two polymorphs of quinuclidine alane exist, formed using an irreversible process that requires expensive starting materials (e.g. LiAlH(4)). The conditions of reversible adduct formation are detailed herein, as well as an analysis of quinuclidine alane by Fourier transform infrared spectroscopy and X-ray diffraction. (C) 2010 Elsevier B.V. All rights reserved.
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