Hysteretic adsorption and desorption of hydrogen by nanoporous metal-organic frameworks.
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 H2 to pass. We observe hysteresis in their adsorption and desorption kinetics above the supercritical temperature of H2 that reflects the dynamical opening of the "windows" between pores. This behavior would allow H2 to be adsorbed at high pressures but stored at lower pressures.
Zhao
Xuebo
X
Northern Carbon Research Laboratories, School of Natural Sciences, Bedson Building, University of Newcastle upon Tyne, Newcastle upon Tyne, NE1 7RU, UK.
Xiao
Bo
B
Fletcher
Ashleigh J
AJ
Thomas
K Mark
KM
Bradshaw
Darren
D
Rosseinsky
Matthew J
MJ