Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 34, Issue 22, Pages 9151-9156Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2009.09.033
Keywords
Metal hydride; Hydrogen storage; In situ; Scanning electron microscopy; Thermal properties
Categories
Funding
- NSERC
- CFI
- HSM Systems
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As-received and ball milled/catalyzed samples of NaAlH4 and LiAlH4 were heated in an environmental scanning electron microscope (ESEM). Morphological changes during heating and hydrogen desorption were recorded in real time. Both as-received materials underwent dramatic morphological and destructive structural changes upon heating, whereas the ball milled/catalyzed samples showed a benign outgassing with little morphological change. These observations help explain why milled/catalyzed samples of metal hydrides perform better as reversible hydrogen storage materials than their uncatalyzed bretheren. Real time videos of the morphological changes observed during heating can be viewed online at the McGrady group website: http://www.unb.ca/fredericton/science/chem/smcgrady/group/shanebeattie/InsituESEM-alanates.html. (C) 2009 Professor T. Nejat Veziroglu Published by Elsevier Ltd. All rights reserved.
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