Tag Archives: hydrides

Confining light metal hydrides in micro- or mesoporous scaffolds

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JournalMaterialResearch“Unusual Oxidation Behavior of Light Metal Hydride by Tetrahydrofurane Solvent Molecules Confined in Ordered
Mesoporous Carbon” Klose, M.; Lindemann, I.; Minella, C.; Pinkert, K.; Zier, M.; Giebeler, L.; Nolis, P.; Baro, M.; Oswald, S.; Gutfleisch, O.; Ehrenberg, H.; Eckert, J. Journal Of Materials Research, 2014, 29, 55-63 DOI:10.1557/jmr.2013.199

Confining light metal hydrides in micro- or mesoporous scaffolds is considered to be a promising way to overcome the existing challenges for these materials, e.g. their application in hydrogen storage. Different techniques exist which allow us to homogeneously fill pores of a host matrix with the respective hydride, thus yielding well defined composite materials. Continue reading Confining light metal hydrides in micro- or mesoporous scaffolds →

NaAlH4 confined in Ordered Mesoporous Carbon

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hydrogen_energyNaAlH4 confined in Ordered Mesoporous Carbon

Bonatto, C.; Lindemann, I.; Nolis, P.; KieBling, A.; Baró, M. D.; Klose, M.; Giebler, L.; Rellinghaus, B.; Eckert, J.; Schultz, L.; Gutfleisch, O.

In this paper we performed a comprehensive investigation of the structural and sorption properties of a 40 wt. % NaAlH4 confined in a ordered mesoporous carbon (OMC, i.e. CMK-3) by means of X-ray diffraction (XRD), transmission electron microscopy (TEM), 23Na{1H} and 27Al{1H} solid-state magic angle spinning-nuclear magnetic resonance (MAS-NMR).

This study evidences a remarkable improvement of the sorption kinetics of NaAlH4 due to its existence in nanometer size within the OMC. The pressure composition isotherm (PCI) analysis (for the re-absorption step) of the nanoconfined NaAlH4 would suggest an alteration of its equilibrium thermodynamic properties.

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