Strategies for Hydrogen Storage in Metal-Organic Frameworks

Increased attention is being focused on metal–organic frameworks as candidates for hydrogen storage materials. This is a result of their many favorable attributes, such as high porosity, reproducible and facile syntheses, amenability to scale‐up, and chemical modification for targeting desired prope...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2005-07, Vol.44 (30), p.4670-4679
Main Authors: Rowsell, Jesse L. C., Yaghi, Omar M.
Format: Article
Language:English
Subjects:
adsorption
hydrogen
metal-organic frameworks
microporous materials
organic-inorganic hybrid composites
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Summary:Increased attention is being focused on metal–organic frameworks as candidates for hydrogen storage materials. This is a result of their many favorable attributes, such as high porosity, reproducible and facile syntheses, amenability to scale‐up, and chemical modification for targeting desired properties. A discussion of several strategies aimed at improving hydrogen uptake in these materials is presented. These strategies include the optimization of pore size and adsorption energy by linker modification, impregnation, catenation, and the inclusion of open metal sites and lighter metals. Reaching a compromise: Metal–organic frameworks such as MOF‐177 (see picture) are potential hydrogen‐storage materials, but the pores (yellow sphere) are much larger than the molecular diameter of H2, thus limiting their effectiveness. Their hydrogen uptake may be improved by impregnation with other moieties (such as C60, gray) to provide additional adsorptive sites and stronger H2 binding at the expense of high porosity.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.200462786