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Inelastic neutron scattering study of binding of para-hydrogen in an ultra-microporous metal-organic framework

Yang, Sihai; Ramirez - Cuesta, Anibal J.; Schröder, Martin

Authors

Sihai Yang

Anibal J. Ramirez - Cuesta

Martin Schröder M.Schroder@man.ac.uk

Abstract

Metal-organic framework (MOF) materials show promise for H2 storage and it is widely predicted by computational modelling that MOFs incorporating ultra-micropores are optimal for H2 binding due to enhanced overlapping potentials. We report the investigation using inelastic neutron scattering of the interaction of H2 in an ultra-microporous MOF material showing low H2 uptake capacity. The study has revealed that adsorbed H2 at 5 K has a liquid recoil motion along the channel with very little interaction with the MOF host, consistent with the observed low uptake. The low H2 uptake is not due to incomplete activation or decomposition as the desolvated MOF shows CO2 uptake with a measured pore volume close to that of the single crystal pore volume. This study represents a unique example of surprisingly low H2 uptake within a MOF material, and complements the wide range of studies on systems showing higher uptake capacities and binding interactions.

Journal Article Type Article
Publication Date Jan 15, 2014
Journal Chemical Physics
Print ISSN 0301-0104
Electronic ISSN 0301-0104
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 428
Institution Citation Yang, S., Ramirez - Cuesta, A. J., & Schröder, M. (2014). Inelastic neutron scattering study of binding of para-hydrogen in an ultra-microporous metal-organic framework. Chemical Physics, 428, doi:10.1016/j.chemphys.2013.11.004
DOI https://doi.org/10.1016/j.chemphys.2013.11.004
Keywords Metal organic framework; Hydrogen adsorption; Inelastic neutron scattering, Neutron spectroscopy; Binding interaction
Publisher URL http://www.sciencedirect.com/science/article/pii/S0301010413004096
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0

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