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Magnesium Nanocrystals Embedded in a Metal–Organic Framework: Hybrid Hydrogen Storage with Synergistic Effect on Physi- and Chemisorption

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  • This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korean Government (MEST) (No. 2011-0031432 and No. 2012-0000651). D.-W. Lim acknowledges support by Hi Seoul Science Fellowship from Seoul Scholarship Foundation. We thank Dr. H. S. Jung in Korea Basic Science Institute for helping us to perform electron microscopy work.

Abstract

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Hexagonal-disk-shaped magnesium nanocrystals (Mg NCs) are fabricated within a porous metal–organic framework (MOF, see picture). The Mg NCs@MOF stores hydrogen by both physi- and chemisorptions, exhibiting synergistic effects to decrease the isosteric heat of H2 physisorption compared with that of pristine MOF, and decrease the H2 chemisorption/desorption temperatures by 200 K compared with those of bare Mg powder.

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