ISIS Neutron and Muon Source Data Journal

experimental validation of dense crystalline phases of nanoconfined H2 at low pressures via neutron diffraction

Abstract: The high volumetric density of solid hydrogen (H2) makes it an attractive method for efficient hydrogen fuel storage. However, solid phases of H2 only exist at exceedingly low temperatures (<15 K) or extremely high pressures (Mbar) limiting practical implementation. Recent experiments reveal that nanoconfinement effects in porous materials can manipulate the phase diagram H2, producing crystalline phases at elevated temperatures, and further suggest that below a threshold pressure, the nanoconfined H2 solids may be denser than the equivalent compressed H2 solid. These experiments will utilize a pressurized H2 gas dosing cell on GEM neutron powder diffractometer, to map out the low-pressure crystalline phase diagram of hydrogen stabilized in nanoporous materials and determine if confined crystal densities are denser than the bulk equivalent at low-pressures. Both H2 and D2 will be examined to determine if any isotope effects infer differences between nanoconfined crystals and increase the scattering signal at low pressures/concentrations.

Experimenter: Mr John Worth
Experimenter: Dr Sebastien Rochat
Experimenter: Dr Lewis Terry
Experimenter: Mr Charlie Brewster
Experimenter: Dr Mi Tian
Local Contact: Dr Ivan da Silva Gonzalez
Experimenter: Professor Valeska Ting

DOI: 10.5286/ISIS.E.RB2310567

ISIS Experiment Number: RB2310567

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Mr John Worth et al; (2023): experimental validation of dense crystalline phases of nanoconfined H2 at low pressures via neutron diffraction, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2310567

Data is released under the CC-BY-4.0 license.