N2 and H2 adsorption behavior of KOH-activated ordered mesoporous carbon
Abstract
Ordered mesoporous carbon, referred to as CMK-3, was synthesized by replication from SBA-15. Activated CMK-3 with developed pore structures provided a large surface area and higher hydrogen adsorption capacities after KOH activation at 1073-1223 K. To characterize the pore structure of the activated samples, N2 and H2 adsorption were measured at 77 K. The hydrogen adsorption of activated CMK-3 increased to 2.26 wt.% at an activation temperature of 1173 K due to the formation of micropores. Thus, KOH activation was not only one of the most effective methods for developing porosity, but also raised the hydrogen storage capacity of CMK-3.
- Publication:
-
Chemical Physics Letters
- Pub Date:
- December 2012
- DOI:
- 10.1016/j.cplett.2012.10.026
- Bibcode:
- 2012CPL...554..133L