Activation, characterization and hydrogen storage properties of the mesoporous carbon CMK-3

Activation of mesoporous carbon CMK-3 with CO 2 for hydrogen storage was studied. Huge structure and texture changes emerged for the activated CMK-3 based on the characterization by using XRD, TEM and nitrogen adsorption at 77 K. The ordered mesoporous structure of CMK-3 gradually became disorder an...

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Bibliographic Details
Published in:Carbon (New York) 2007-09, Vol.45 (10), p.1989-1996
Main Authors: Xia, Kaisheng, Gao, Qiuming, Wu, Chundong, Song, Shuqing, Ruan, Meiling
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Fullerenes and related materials
diamonds, graphite
General and physical chemistry
Materials science
Physics
Porous materials
Specific materials
Surface physical chemistry
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Summary:Activation of mesoporous carbon CMK-3 with CO 2 for hydrogen storage was studied. Huge structure and texture changes emerged for the activated CMK-3 based on the characterization by using XRD, TEM and nitrogen adsorption at 77 K. The ordered mesoporous structure of CMK-3 gradually became disorder and its specific surface area and volume of pores especially micropores were enhanced remarkably. Hydrogen sorption measurement showed that the activation led to an obvious increase of the H 2 sorption capacity of CMK-3. The maximum H 2 uptake of 2.27 wt% at 77 K and 1 bar was obtained for the sample activated at 1223 K for 8 h. The small pores with the diameter smaller than 1 nm contributed greatly to the H 2 uptake, and were confirmed more effective than other pores for hydrogen storage.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2007.06.002