Notably, operation at such lower pressures (20-48 bar) is relevant to the last-mile distribution of hydrogen and the charging at 35 bar is achievable by single-stage compressors. The Cu I M-MFU-4l materials clearly have more than one type of adsorption site, in view of crystallographic and spectroscopic data, as the high-pressure H2 adsorption isotherm data. Indeed, the effect of thermodynamic parameters on the usable capacity of an adsorbent has mainly been considered for an energetically homogenous adsorbent (i.e., a single-site Langmuir model).