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Updated: May 16, 2026
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A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions
Published on: August 17, 2016
Open carbon frameworks - a search for optimal geometry for hydrogen storage
Bogdan Kuchta1, Lucyna Firlej, Ali Mohammadhosseini
1Department of Physics and Astronomy, University of Missouri, Columbia, MO, 65211, USA, bogdan.kuchta@univ-amu.fr.
Journal of Molecular Modeling
|December 11, 2012
Summary
New open carbon frameworks (OCF) show high hydrogen storage capacity. Fragmentation of graphene increases surface area, but adsorption energy decreases, defining physical limits for efficient hydrogen adsorption.
Area of Science:
- Materials Science
- Physical Chemistry
- Nanotechnology
Background:
- High-surface-area porous carbons are crucial for gas adsorption applications.
- Understanding hydrogen adsorption limits in these materials is key for developing efficient storage solutions.
Purpose of the Study:
- To analyze the physical limits of hydrogen adsorption in hypothetical open carbon frameworks (OCF).
- To investigate the interplay between surface area and adsorption energy in nano-sized carbon structures.
Main Methods:
- Analytical modeling of hydrogen adsorption.
- Simulations of adsorption in porous carbon structures.
- Analysis of OCFs constructed from coronene and benzene molecules.
Main Results:
- Fragmentation of graphene sheets into nano-elements increases surface area (>2600 m²/g), enhancing storage capacity.
- Decreasing adsorption energy in nano-sized carbon scaffolds compensates for increased surface area.
- OCFs with surface areas of 6500 m²/g exhibit excess adsorption of 75-110 g H₂/kg C at 77 K.
- High storage capacity of 110-150 g H₂/kg C at 77 K and 100 bar was achieved.
Conclusions:
- Physical limits for hydrogen adsorption in porous carbons are defined by surface area and adsorption energy.
- Novel OCFs demonstrate potential for meeting hydrogen storage requirements in mobile applications.
- Further synthesis and optimization of OCFs could unlock advanced hydrogen storage technologies.
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