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Synthesis and characterization of novel anionic transition metal borohydrides

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M.S.Q111.H3 4166 MAY 2007 r.pdf Version for non-UH users. Copying/Printing is not permitted 3.42 MB Adobe PDF View/Open
M.S.Q111.H3 4166 MAY 2007 uh.pdf Version for UH users 3.41 MB Adobe PDF View/Open

Item Summary

Title:Synthesis and characterization of novel anionic transition metal borohydrides
Authors:Eliseo, Jennifer R.
Keywords:Boranes -- Synthesis
Transition metal hydrides -- Synthesis
Date Issued:2007
Abstract:Zinc borohydride (Zn(BH4)2) has been the focus of much recent research in the field of hydrogen storage. This material has a low decomposition temperature (around 85°C) and a high theoretical hydrogen capacity (8.5% H2). These studies include mechanochemical synthesis of zinc borohydride and its derivatives at room temperature without solvent following the reaction: ZnX2 + nMBH4-> Mn-2Zn(BH4)n + 2MX where M = Li, No, or K; X = Cl; and n = 1, 2, 3, or 4. Product mixtures were characterized by IR, XRD, and CPMAS B NMR spectroscopy. Analysis of material properties was completed by thermal decomposition mass spectrometry (TD-MS) and isothermal dehydrogenation studies. These fundamental studies confirmed the synthesis of novel borohydride materials. It was found that the milling of zinc chloride with a1ka1i borohydrides reduces the dehydrogenation temperature. However, upon dehydrogenation, both hydrogen and diborane are liberated.
Description:Thesis (M.S.)--University of Hawaii at Manoa, 2007.
Includes bibliographical references (leaves 87-92).
viii, 92 leaves, bound ill. 29 cm
Rights:All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
Appears in Collections: M.S. - Chemistry

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