Regensburg 2007 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 9: Oxides and Insulators: Adsorption I

O 9.4: Vortrag

Montag, 26. März 2007, 12:00–12:15, H42

Hydrogen storage by adsorption on microporous materials — •Katja Hönes, Barbara Panella, and Michael Hirscher — Max Planck Institut für Metallforschung, Heisenbergstr. 3, 70569 Stuttgart

Different microporous materials have been investigated for their capability to store hydrogen by physisorption. The amount of adsorbed hydrogen for three metal organic frameworks (IRMOF 8, MIL 101 and MOF 74) and the zeolite NaX has been measured volumetrically by a Sieverts' apparatus at 77K and at room temperature. Additionally, thermal desorption spectroscopy measurements between 22K and 370K have been carried out in order to distinguish different adsorption sites. The highest hydrogen uptake at 77K was measured for MIL 101 (4.25 wt%), which posseses the highest specific surface area of all materials investigated. According to their lower specific surface area IRMOF 8 adsorbed 3.4wt%, MOF 74 2.3 wt% and NaX 1.3 wt% at 77K.

(We kindly acknowledge M. Hartmann, Universität Augsburg, U. Müller, BASF AG Ludwigshafen and D. Book, University of Brimingham for supplying the samples.)