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Effect of Pore Size on Dehydrogenation Temperature of Carbon Cryogel-Ammoniaborane Nanocomposites

Published online by Cambridge University Press:  01 February 2011

Saghar Sepehri ,
Betzaida Batalla Garcia  and
Guozhong Cao
Saghar Sepehri
Affiliation:
sepehri@u.washington.edu, University of Washington, Materials Science and Engineering, 302 Roberts Hall, Seattle, WA, 98195-2120, United States
Betzaida Batalla Garcia
Affiliation:
bbg5@u.washington.edu, University of Washington, Materials Science and Engineering, Seattle, WA, 98195-2120, United States
Guozhong Cao
Affiliation:
gzcao@u.washington.edu, University of Washington, Materials Science and Engineering, Seattle, WA, 98195-2120, United States
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Abstract

This study reports the effects of pore size of porous carbon scaffold on the dehydrogenation of ammoniaborane in the coherent carbon- ammoniaborane nanocomposites. Porous carbon scaffold is obtained from resorcinol formaldehyde derived carbon cryogels. The nanocomposites are made by simple soaking porous carbon scaffold in ammonia borane solution. Nitrogen sorption analysis and differential scanning calorimetry are used to investigate the structure and dehydrogenation of the nanocomposites. The results reveal that dehydrogenation temperature decreases in nanocomposites as compared to neat ammonia borane, and is lower in nanocomoposites with smaller pore sizes. These findings can be used to tune the dehydrogenation temperature to meet specific hydrogen storage applications. Also, dehydrogenation kinetics of nanocomposites is enhanced as compared to neat ammonia borane.

Keywords

energy storageCporosity
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1098: Symposium HH – The Hydrogen Economy , 2008 , 1098-HH05-09
Copyright
Copyright © Materials Research Society 2008

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