Abstract
The hydrogen adsorption isotherms of six metal–organic frameworks (MOFs) and three microporous carbons, measured at 77 K (up to 1 bar) and 298 K (up to 100 bar), have been systematically examined for correlations with their pore characteristics. From the obtained correlations, H2 adsorption was found to occur preferentially in ultrafine pores at both 77 K (≤1 bar) and 298 K (100 bar), irrespective of the adsorbent. This represents the first experimental evidence that ultrafine pores in MOFs improve the efficiency of H2 adsorption at 298 K and at high pressures, indicating that that the low H2 storage capacities of reported ultrahigh microporous MOFs at 298 K result from the prominence of micropores with diameters 1–2 nm, which are inadequate at 298 K and high pressures. Furthermore, these correlations suggest strong links between the H2 storage capacities at 77 and 298 K, which offer an easy method for predicting H2 adsorption capacities under unapproachable conditions. This study provides guidance in the...
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
