Covalent Organic Frameworks as Exceptional Hydrogen Storage Materials
Sang Soo Han, Hiroyasu Furukawa, Omar M. Yaghi, William A. Goddard III
Abstract
We report the H_2 uptake properties of six covalent organic frameworks (COFs) from first-principles-based grand canonical Monte-Carlo simulations. The predicted H_2 adsorption isotherm is in excellent agreement with the only available experimental result (3.3 vs 3.4 wt % at 50 bar and 77 K for COF-5), also reported here, validating the predictions. We predict that COF-105 and COF-108 lead to a reversible excess H_2 uptake of 10.0 wt % at 77 K, making them the best known storage materials for molecular hydrogen at 77 K. We predict that the total H_2 uptake for COF-108 is 18.9 wt % at 77 K. COF-102 shows the best volumetric performance, storing 40.4 g/L of H_2 at 77 K. These results indicate that the COF systems are most promising candidates for practical hydrogen storage.
Group Members
Han, S. S., Furukawa, H., Yaghi, O. M., & III, W. A. G. (2008). Covalent Organic Frameworks as Exceptional Hydrogen Storage Materials. *J. Am. Chem. Soc.*, *130*(35), 11580-11581. https://doi.org/10.1021/ja803247y