Molecular dynamics simulation study on the hydrogen adsorption and diffusion in non-interpenetrating and interpenetrating IRMOFs

Tae Bum Lee, Dong Hyun Jung, Daejin Kim, Jaheon Kim, Kihang Choi, Seung Hoon Choi

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    14 Citations (Scopus)

    Abstract

    We performed molecular dynamics simulations at 77 K on the non-interpenetrating isoreticular (having the same underlying topology) metal-organic frameworks (IRMOFs) and the interpenetrating IRMOFs to investigate the adsorption behavior of hydrogen on the surface of MOFs, catenation effect on the density of adsorbed hydrogen, and dynamic behavior of adsorbed hydrogen molecules. We tested two classical force fields, universal force field (UFF) and DREIDING force field for the simulations and found out that the UFF describes the adsorption of hydrogen more reliably than DREIDING force field. The simulations showed the density values of adsorbed hydrogen in the small pores of the interpenetrating IRMOFs are higher than those in the larger pores of the non-interpenetrating IRMOFs, and the diffusion of the hydrogen molecules in the interpenetrating IRMOFs is highly restricted compared to the non-interpenetrating IRMOFs. From the simulation results, we concluded that the small pores created by the catenation might contribute the increase of the adsorption capacity of the interpenetrating IRMOFs.

    Original languageEnglish
    Pages (from-to)216-222
    Number of pages7
    JournalCatalysis Today
    Volume146
    Issue number1-2
    DOIs
    Publication statusPublished - 2009 Aug 15

    Bibliographical note

    Funding Information:
    This research was performed for the Hydrogen Energy R&D Center, one of the 21st Century Frontier R&D Program, funded by the Ministry of Education, Science and Technology of Korea. We thank Accelrys Korea for the support of modeling software.

    Keywords

    • Hydrogen
    • Interpenetration
    • Metal-organic framework
    • Micro-porous
    • Molecular dynamics simulation

    ASJC Scopus subject areas

    • Catalysis
    • General Chemistry

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