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Improved dehydrogenation of LiBH4 supported on nanoscale SiO2 via liquid phase method

Published online by Cambridge University Press:  31 January 2011

X.Y. Chen ,
Y.H. Guo ,
L. Gao  and
X.B. Yu
X.Y. Chen
Affiliation:
Department of Materials Science, Fudan University, Shanghai 200433, China
Y.H. Guo
Affiliation:
Department of Materials Science, Fudan University, Shanghai 200433, China
L. Gao
Affiliation:
Department of Materials Science, Fudan University, Shanghai 200433, China
X.B. Yu*
Affiliation:
Department of Materials Science, Fudan University, Shanghai 200433, China
*
a)Address all correspondence to this author. e-mail: yuxuebin@fudan.edu.cn
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Abstract

A wet loading method was developed to produce nano-sized LiBH4 combined with nano-SiO2 templates. The multicomponent LiBH4/SiO2 material synthesized by the wet method has been found to dehydrogenate at much lower temperatures than the pure LiBH4, as well as LiBH4/SiO2 mixtures prepared by ball milling. For example, the onset of dehydrogenation was decreased to about 200 °C for a wet-treated LiBH4/SiO2 mixture with a mass ratio of 1:1, and the majority of the hydrogen could be released below 350 °C. The improved dehydrogenation of the wet-treated LiBH4/SiO2 mixtures can be attributed to the destabilization of SiO2, resulting in the formation of lithium metasilicate (Li2SiO3) upon heating, and the confinement of LiBH4 to form nanoscale particles.

Keywords

Nanoscale
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 12 , December 2010 , pp. 2415 - 2421
Copyright
Copyright © Materials Research Society 2010

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