Abstract
Adsorption of hydrogen and the occupancy of different binding sites as a function of hydrogen loading in MOF-74 are studied using inelastic neutron scattering (INS). Hydrogen molecules are observed to fully occupy the strongest binding site before populating other adsorption sites. The comparison of the INS spectra at 4 K and 60 K indicates that hydrogen adsorbed at the strongest binding site is strongly bound and localized. We also show that when two hydrogen molecules are adsorbed into a single, attractive potential well, the shortest inter-H2 distance is about 3 Å, consistent with our previous observation of inter-H2 distance when adsorbed in two neighboring potential wells.
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Liu, Y., Brown, C.M., Neumann, D.A. et al. Hydrogen Adsorption in MOF-74 Studied by Inelastic Neutron Scattering. MRS Online Proceedings Library 1041, 203 (2007). https://doi.org/10.1557/PROC-1041-R02-03
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DOI: https://doi.org/10.1557/PROC-1041-R02-03