Article Exploration of heterogeneous catalyst for molecular hydrogen ortho-para conversion

Hideki Abe SAMURAI ORCID (Research Center for Energy and Environmental Materials (GREEN)/Hydrogen Technology Materials Field/Hydrogen Production Catalyst Materials Group, National Institute for Materials ScienceROR) ; Hiroshi Mizoguchi SAMURAI ORCID (Research Center for Materials Nanoarchitectonics (MANA)/Nanomaterials Field/ElectroActive Materials Team, National Institute for Materials ScienceROR) ; Ryuto Eguchi SAMURAI ORCID (Center for Basic Research on Materials/Advanced Materials Characterization Field/In-situ Electron Microscopy Technique Group, National Institute for Materials ScienceROR) ; Hideo Hosono SAMURAI ORCID (National Institute for Materials ScienceROR)

Exploration - 2023 - Abe - Exploration of heterogeneous catalyst for molecular hydrogen ortho‐para conversion.pdf
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Hideki Abe, Hiroshi Mizoguchi, Ryuto Eguchi, Hideo Hosono. Exploration of heterogeneous catalyst for molecular hydrogen ortho-para conversion. Exploration. 2023, 4 (3), . https://doi.org/10.1002/EXP.20230040
SAMURAI

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(abstract)

Molecular hydrogen (H2) ortho-para conversion (O/P conversion) proceeds slowly at low temperatures accompanying a heat release. Thus, catalysts for accelerating this conversion rate are highly demanded in terms of the storage and utilization of liquid H2. The catalysts for this purpose are experimentally screened by examining a broad range of materials covering magnetic, non-magnetic, metallic, and nonmetallic oxides. The primary conclusions obtained are summarized below. (1) active materials are required to be non-metallic and to bear the cations with ionic radii smaller than the bond length of H2. (2) Metallic materials have almost no activity irrespective of with or without magnetism (3) The activity of materials belonging to (1) is largely enhanced when the constituting cation has a magnetic moment. In addition, there is a class of materials for which the activity is distinctly enhanced just upon substitution by the foreign ions.

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Keyword: ortho-para conversion

Date published: 2023-12-14

Publisher: Wiley

Journal:

  • Exploration (ISSN: 27662098) vol. 4 issue. 3

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Manuscript type: Publisher's version (Version of record)

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First published URL: https://doi.org/10.1002/EXP.20230040

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Updated at: 2024-11-28 16:30:34 +0900

Published on MDR: 2024-11-28 16:30:34 +0900

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