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Zhao, Xuebo; Xiao, Bo; Fletcher, Ashleigh J.; Thomas, K. Mark; Bradshaw, Darren; Rosseinsky, Matthew J.
Science (American Association for the Advancement of Science), 11/2004, Letnik: 306, Številka: 5698Journal Article
Adsorption and desorption of hydrogen from nanoporous materials, such as activated carbon, is usually fully reversible. We have prepared nanoporous metal-organic framework materials with flexible linkers in which the pore openings, as characterized in the static structures, appear to be too small to allow H2to pass. We observe hysteresis in their adsorption and desorption kinetics above the supercritical temperature of H2that reflects the dynamical opening of the "windows" between pores. This behavior would allow H2to be adsorbed at high pressures but stored at lower pressures.
