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Thermal and Volumetric Studies of Complex Chemical Hydrides: Li-modified/Ti- doped Mg2FeH6, Sonicated LiNH2/LiH and Zn- doped NaBH4

Published online by Cambridge University Press:  01 February 2011

Sesha Srinivasan ,
Lisa McElwee-White ,
Elias Stefanakos ,
Yogi Goswami  and
Seth Dumbris
Sesha Srinivasan
Affiliation:
[email protected], University of South Florida, 4202 E. Fowler Ave, Tampa, FL, 33620, United States
Lisa McElwee-White
Affiliation:
[email protected], University of Florida, Department of Chemistry, United States
Elias Stefanakos
Affiliation:
[email protected]
Yogi Goswami
Affiliation:
[email protected]
Seth Dumbris
Affiliation:
[email protected], University of Florida, Department of Chemistry, United States
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Abstract

Light weight hydrogen storage systems are indeed essential for the on-board automotive vehicular applications. Complex chemical hydrides bearing light elements such as Li, Na, Mg etc. and their catalytic doping with transition metal species are presently being investigated. The Li- modified Mg2FeH6 structure have been thermally characterized using DSC and TGA techniques. It is interesting to notice that the reduction in the decomposition temperature of about 100° C has been unambiguously observed for the Li modified Mg2FeH6. Besides, there is an enhancement in sorption kinetics for the Ti- doped Mg2FeH6. The role of Ti- species on the dehydrogenation and rehdyrogenation properties of NaAlH4 have been explored by heat flow measurements using high pressure differential scanning calorimetry. We have also developed the Li-amide/LiH system by sonicated process and studied their PCT characteristics. A new class of hydrogen storage system Zn(BH4)2 with theoretical hydrogen capacity of 8.4 wt.% have been synthesized and we have determined their gravimetric and volumetric characteristics.

Keywords

catalytichydrogenationmechanical alloying
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 885: Symposium A – The Hydrogen Cycle – Generation, Storage and Fuel Cells , 2005 , 0885-A07-03
Copyright
Copyright © Materials Research Society 2006

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References

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