Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 492, Issue 1-2, Pages 88-94Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2009.11.203
Keywords
Hydrogen absorbing materials; Metal-organic framework; Characterization; Nanostructured materials
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The present study established a time-saving technique for hydrogen uptake measurements using a high-pressure thermo-gravimetric analyzer (HPTGA). The critical buoyancy effects were considered in the analysis model. The HPTGA technique developed here for metal-organic frameworks (MOFs) was validated through independent experiments. The room temperature (RT) hydrogen uptake of MOFs via spillover was significantly enhanced by use of a bridge-building treatment. MOF samples with different structural parameters and RT hydrogen uptake performance can be prepared and manipulated through various factors affecting their synthesis. The structural evolution of MOFs within various steps during the synthesis and bridge-building processes were investigated by electron microscopy, nitrogen sorption isotherm analysis, and powder X-ray diffraction. (C) 2009 Elsevier B.V. All rights reserved.
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