2011 | OriginalPaper | Buchkapitel
Characterisation of Carbon Nanotube Foam for Improved Gas Storage Capability
verfasst von : Armando Peña, Aimé Guerrero, Julio Puerta, Joaquín L. Brito, Thomas K. Heckel
Erschienen in: Experimental Mechanics on Emerging Energy Systems and Materials, Volume 5
Verlag: Springer New York
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Advanced fuel cells require efficient hydrogen storage tanks. This study presents preliminary results on a novel compound based on an alumina substrate coated with carbon nanotube foam (CNF) that is expected to improve substantially the hydrogen storage capability. A catalytic chemical vapour deposition (CCVD) technique was applied for obtaining the desired structure. It involved the organometallic compound ferrocene (a simultaneous source of iron and carbon), H
2
as reducing gas, and Ar as dragging gas. The CNF-alumina system formed was characterised by means of scanning and transmission electron microscopy (SEM, TEM, resp.). Applying the BET method with N
2
as carrier gas, it was found that the novel compound exhibits a high specific surface area, due to the porous morphology, and a high thermal stability. These aspects are very promising for the application intended. The sponge-like structure of the CNF may store hydrogen (or other gases) due to physical adsorption in much larger quantities as compared to conventional storage tanks.