Document Type
Article
Original Publication Date
2010
Journal/Book/Conference Title
The Journal of Chemical Physics
Volume
133
DOI of Original Publication
10.1063/1.3503654
Date of Submission
October 2015
Abstract
Covalent organic frameworks (COFs), due to their low-density, high-porosity, and high-stability, have promising applications in gas storage. In this study we have explored the potential of COFs doped with Li and Ca metal atoms for storing hydrogen under ambient thermodynamic conditions. Using density functional theory we have performed detailed calculations of the sites Li and Ca atoms occupy in COF-10 and their interaction with hydrogen molecules. The binding energy of Li atom on COF-10 substrate is found to be about 1.0 eV and each Li atom can adsorb up to three H2 molecules. However, at high concentration, Li atoms cluster and, consequently, their hydrogen storage capacity is reduced due to steric hindrance between H2 molecules. On the other hand, due to charge transfer from Li to the substrate, O sites provide additional enhancement for hydrogen adsorption. With increasing concentration of dopedmetal atoms, the COF-10 substrate provides an additional platform for storing hydrogen. Similar conclusions are reached for Ca doped COF-10.
Rights
Wu, M.M., Wang, Q., Sun, Q., et al. First-principles study of hydrogen adsorption in metal-doped COF-10. The Journal of Chemical Physics, 133, 154706 (2010). Copyright © 2010 AIP Publishing LLC.
Is Part Of
VCU Physics Publications
Comments
Originally Published at http://dx.doi.org/10.1063/1.3503654