High-Pressure Insertion of Dense H₂ into a Model Zeolite.

ABSTRACT: Our combined high-pressure synchrotron X-ray diffraction and Monte Carlo modeling studies show super-filling of the zeolite, and computational results suggest an occupancy by a maximum of nearly two inserted H₂ molecules per framework unit, which is about twice that observed in gas hydrates. Super-filling prevents amorphization of the host material up to at least 60 GPa, which is a record pressure for zeolites and also for any group IV element being in full 4-fold coordination, except for carbon. We find that the inserted H₂ forms an exotic topologically constrained glassy-like form, otherwise unattainable in pure hydrogen. Raman spectroscopy on confined H₂ shows that the microporosity of the zeolite is retained over the entire investigated pressure range (

SUBMITTER: Xu W 

PROVIDER: S-EPMC9490752 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature