Synthesis and hydrogen adsorption properties of a new iron based porous metal-organic framework |
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| Authors: | Dan Lupu Ovidiu ArdeleanGabriela Blanita Gheorghe BorodiMihaela D. Lazar Alexandru R. BirisColdea Ioan Maria MihetIoan Misan Gabriel Popeneciu |
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| Affiliation: | National Institute for R&D of Isotopic and Molecular Technologies, 65-103 Donath Str., 400293 Cluj-Napoca, Romania |
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| Abstract: | A new metal-organic framework [Fe3O(OOC-C6H4-COO)3(H2O)3]Cl·(H2O)x was synthesized with a specific surface area of 2823 m2/g and a lattice parameter of 88.61 Å. Isostructural with MIL-101, this compound exhibits similar hydrogen adsorption properties, with maximum adsorption capacity of 5.1wt.% H at 77 K. The adsorption enthalpy of hydrogen for MIL-101 and ITIM-1 (MIL-101Fe) at zero coverage was calculated for a wide temperature range of 77 K ÷ 324 K, considering corrections for the variation of hydrogen gas entropy with the temperature. The resulted adsorption enthalpy is 9.4 kJ/mol for MIL-101, in excellent agreement with the value reported in literature from microcalorimetric measurements, and a value of 10.4 kJ/mol at zero coverage was obtained for ITIM-1 (MIL-101Fe). |
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| Keywords: | Metal-organic frameworks Hydrogen Heat of adsorption Iron |
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