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Moon, Hoi Ri
Functional Inorganic Nanomaterials for Energy Lab (FINE)
Research Interests
  • Inorganic-organic hybrid materials, carbon capture materials, hydrogen storage materials, heterogeneous catalyst


Air-stable magnesium nanocomposites provide rapid and high-capacity hydrogen storage without using heavy-metal catalysts

DC Field Value Language Jeon, Ki-Joon ko Moon, Hoi Ri ko Ruminski, Anne M. ko Jiang, Bin ko Kisielowski, Christian ko Bardhan, Rizia ko Urban, Jeffrey J. ko 2014-04-10T01:13:46Z - 2013-06-07 ko 2011-04 ko
dc.identifier.citation NATURE MATERIALS, v.10, no.4, pp.286 - 290 ko
dc.identifier.issn 1476-1122 ko
dc.identifier.uri -
dc.description.abstract Hydrogen is a promising alternative energy carrier that can potentially facilitate the transition from fossil fuels to sources of clean energy because of its prominent advantages such as high energy density (142 MJ kg(-1); ref. 1), great variety of potential sources (for example water, biomass, organic matter), light weight, and low environmental impact (water is the sole combustion product). However, there remains a challenge to produce a material capable of simultaneously optimizing two conflicting criteria-absorbing hydrogen strongly enough to form a stable thermodynamic state, but weakly enough to release it on-demand with a small temperature rise. Many materials under development, including metal-organic frameworks, nanoporous polymers, and other carbon-based materials, physisorb only a small amount of hydrogen (typically 1-2 wt%) at room temperature. Metal hydrides were traditionally thought to be unsuitable materials because of their high bond formation enthalpies (for example MgH2 has a Delta H-f similar to 75 kJ mol(-1)), thus requiring unacceptably high release temperatures resulting in low energy efficiency. However, recent theoretical calculations and metal-catalysed thin-film studies have shown that microstructuring of these materials can enhance the kinetics by decreasing diffusion path lengths for hydrogen and decreasing the required thickness of the poorly permeable hydride layer that forms during absorption. Here, we report the synthesis of an air-stable composite material that consists of metallic Mg nanocrystals (NCs) in a gas-barrier polymer matrix that enables both the storage of a high density of hydrogen (up to 6 wt% of Mg, 4 wt% for the composite) and rapid kinetics (loading in < 30 min at 200 degrees C). Moreover, nanostructuring of the Mg provides rapid storage kinetics without using expensive heavy-metal catalysts. ko
dc.description.statementofresponsibility close -
dc.language 영어 ko
dc.title Air-stable magnesium nanocomposites provide rapid and high-capacity hydrogen storage without using heavy-metal catalysts ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-79953065994 ko
dc.identifier.wosid 000288744700018 ko
dc.type.rims ART ko
dc.description.wostc 124 *
dc.description.scopustc 111 * 2015-02-28 * 2014-08-27 *
dc.identifier.doi 10.1038/NMAT2978 ko
dc.identifier.url ko
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