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Synthesis and hydrogen adsorption properties of a new iron based porous metal-organic framework

✍ Scribed by Dan Lupu; Ovidiu Ardelean; Gabriela Blanita; Gheorghe Borodi; Mihaela D. Lazar; Alexandru R. Biris; Coldea Ioan; Maria Mihet; Ioan Misan; Gabriel Popeneciu

Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
538 KB
Volume
36
Category
Article
ISSN
0360-3199

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✦ Synopsis

A new metal-organic framework [Fe 3 O(OOC-C 6 H 4 -COO) 3 (H 2 O) 3 ]Cl$(H 2 O) x was synthesized with a specific surface area of 2823 m 2 /g and a lattice parameter of 88.61 A ˚. 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 O 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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