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Synthesis and characterization of novel anionic transition metal borohydrides
|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|
|Title:||Synthesis and characterization of novel anionic transition metal borohydrides|
|Authors:||Eliseo, Jennifer R.|
|Keywords:||Boranes -- Synthesis|
Transition metal hydrides -- Synthesis
|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
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|Appears in Collections:||M.S. - Chemistry|
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