As the most porous family of materials, new metal-organic frameworks (MOFs) structures are being synthesized and studied for various applications. Hydrogen storage has been one of the major applications of MOFs that was extensively explored. In this work, we report five new porous MOFs based on a tetratopic ligand. By varying the metal salts and solvent in the solvothermal reaction, these MOFs exhibit different structural features. All of them showed impressive hydrogen storage capacities, especially the ionic Co-MOF, which reaches 2.64 wt% uptake at 77 K and 1 bar. Based on the hydrogen uptake data, a list of structural properties including catenation, metal nodes, charge, topology and pore size are reported and evaluated for hydrogen storage application. These structure-property relationship studies are effective in guiding the rational design of better MOFs for hydrogen storage.

Porous metal-organic frameworks for hydrogen storage

255th National Meeting (2018)

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