Effects of various catalysts on hydrogen release and uptake characteristics of LiAlH4

    Authors

    M. Resan; M. D. Hampton; J. K. Lomness;D. K. Slattery

    Comments

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    Abbreviated Journal Title

    Int. J. Hydrog. Energy

    Keywords

    hydrides; alanates; ALUMINUM HYDRIDES; STORAGE MATERIALS; METAL HYDRIDES; DECOMPOSITION; NAALH4; Chemistry, Physical; Electrochemistry; Energy & Fuels

    Abstract

    The effects of various catalysts on the hydrogen release characteristics of LiAlH4 were studied. The catalysts were incorporated into the alanate by ball milling. The catalysts studied included elemental titanium, TiH2, TiCl4, TiCl3, AlCl3, FeCl3, elemental iron, elemental nickel, elemental vanadium, and carbon black. Dehydriding/rehydriding properties were characterized by using differential scanning calorimetry coupled with pressure measurement and X-ray diffraction. The addition of TiCl3 and TiCl4 to LiA1H(4) eliminated the first step of hydrogen evolution and significantly lowered decomposition temperature of the second step. Doping with elemental iron caused only a slight decrease in the amount of hydrogen released and did not eliminate the first step of hydrogen evolution. Ball milling in the absence of the catalyst was found to decrease the release temperature of hydrogen, while doping with elemental iron did not have any additional effect on the temperature of hydrogen release of LiAlH4. (c) 2005 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.

    Journal Title

    International Journal of Hydrogen Energy

    Volume

    30

    Issue/Number

    13-14

    Publication Date

    1-1-2005

    Document Type

    Article

    Language

    English

    First Page

    1413

    Last Page

    1416

    WOS Identifier

    WOS:000233293500007

    ISSN

    0360-3199

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