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ID 25963
file
creator
Kawai, Yasuaki
Matsumoto, Mitsuru
Haga, Tetsuya
subject
Hydrogen absorbing materials
Metal hydrides
Mechanochemical processing
Catalysis
X-ray diffraction
NDC
Chemistry
abstract
The effects of various catalysts on the H2 release characteristics of LiAlH4 were studied. It was established that the catalytic activity defined by the H2 desorption capacity by a mechanochemical reaction decreased in the series TiCl3>ZrCl4>VCl3>NiCl2>ZnCl2. Transition metal trialuminides Al3X (X=Ti, Zr, V, Ni) were prepared by the mechanochemical reaction of LiAlH4 and the metal chlorides, while the reaction of LiAlH4 and ZnCl2 yields Zn. The high catalytic activity was attributed to the lower percentage d-character and the electronegativity of those transition metals. The catalytic activity of Ni was also improved with decreasing the Ni particle size. Those catalysts were classified to two groups (1. TiCl3, ZrCl4, 2. VCl3, NiCl2, Ni, nano-Ni) from the viewpoint of the H2 desorption mechanism.
journal title
Journal of Alloys and Compounds
volume
Volume 462
issue
Issue 1-2
start page
275
end page
278
date of issued
2008-08-25
publisher
Elsevier Science S.A.
issn
0925-8388
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
Copyright (c) 2007 Published by Elsevier B.V.
relation url
department
Institute for Advanced Materials Research