The ortho-para transition, confinement and self-diffusion of H2 in three distinct carbide-derived carbons by quasi- and inelastic neutron scattering
Microporous carbon materials are promising for hydrogen storage due to their structural variety, high specific surface area, large pore volume and relatively low cost. Carbide-derived carbons are highly valued as model materials because their porous structure is fine-tuned through the choice of the...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2023-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2023/12/epjconf_ecns2023_05001.pdf |
| _version_ | 1827792305324556288 |
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| author | Härmas Riinu Palm Rasmus Koppel Miriam Kalder Laura Russina Margarita Kurig Heisi Härk Eneli Aruväli Jaan Tallo Indrek Embs Jan P. Lust Enn |
| author_facet | Härmas Riinu Palm Rasmus Koppel Miriam Kalder Laura Russina Margarita Kurig Heisi Härk Eneli Aruväli Jaan Tallo Indrek Embs Jan P. Lust Enn |
| author_sort | Härmas Riinu |
| collection | DOAJ |
| description | Microporous carbon materials are promising for hydrogen storage due to their structural variety, high specific surface area, large pore volume and relatively low cost. Carbide-derived carbons are highly valued as model materials because their porous structure is fine-tuned through the choice of the precursor carbide and the synthesis route. This study investigates H2 adsorption in three carbide derived carbons with well-defined pores and pore size distributions with quasi- and inelastic neutron scattering methods. Concerning previous studies, a wider neutron energy transfer window is investigated, and a detailed quantitative evaluation of the graphitic structure is presented. The graphitic structure of the carbon is shown to influence the speed of the ortho-to-para transition of H2. Namely, the ortho-para transition was the slowest in carbon derived from TiC, which also had the smallest average stacking size of graphene layers. The possibility to inhibit the ortho-para transition in cryo-adsorption devices is sought after to mitigate the evaporation of H2 during storage. In addition, the self-diffusion of H2 in different timescales is detected in carbon derived from Mo2C, demonstrating the usefulness of obtaining data in a wide energy window. |
| first_indexed | 2024-03-11T18:01:06Z |
| format | Article |
| id | doaj.art-6bffa6d2910140708a2445959cff1d77 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-03-11T18:01:06Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-6bffa6d2910140708a2445959cff1d772023-10-17T08:54:29ZengEDP SciencesEPJ Web of Conferences2100-014X2023-01-012860500110.1051/epjconf/202328605001epjconf_ecns2023_05001The ortho-para transition, confinement and self-diffusion of H2 in three distinct carbide-derived carbons by quasi- and inelastic neutron scatteringHärmas Riinu0Palm Rasmus1Koppel Miriam2Kalder Laura3Russina Margarita4Kurig Heisi5Härk Eneli6Aruväli Jaan7Tallo Indrek8Embs Jan P.9Lust Enn10Institute of Chemistry, University of TartuInstitute of Chemistry, University of TartuInstitute of Chemistry, University of TartuInstitute of Chemistry, University of TartuHelmholtz-Zentrum Berlin für Materialien und EnergieInstitute of Chemistry, University of TartuInstitute of Chemistry, University of TartuDepartment of Geology, University of TartuInstitute of Chemistry, University of TartuLaboratory for Neutron Scattering and Imaging, Paul Scherrer InstituteInstitute of Chemistry, University of TartuMicroporous carbon materials are promising for hydrogen storage due to their structural variety, high specific surface area, large pore volume and relatively low cost. Carbide-derived carbons are highly valued as model materials because their porous structure is fine-tuned through the choice of the precursor carbide and the synthesis route. This study investigates H2 adsorption in three carbide derived carbons with well-defined pores and pore size distributions with quasi- and inelastic neutron scattering methods. Concerning previous studies, a wider neutron energy transfer window is investigated, and a detailed quantitative evaluation of the graphitic structure is presented. The graphitic structure of the carbon is shown to influence the speed of the ortho-to-para transition of H2. Namely, the ortho-para transition was the slowest in carbon derived from TiC, which also had the smallest average stacking size of graphene layers. The possibility to inhibit the ortho-para transition in cryo-adsorption devices is sought after to mitigate the evaporation of H2 during storage. In addition, the self-diffusion of H2 in different timescales is detected in carbon derived from Mo2C, demonstrating the usefulness of obtaining data in a wide energy window.https://www.epj-conferences.org/articles/epjconf/pdf/2023/12/epjconf_ecns2023_05001.pdf |
| spellingShingle | Härmas Riinu Palm Rasmus Koppel Miriam Kalder Laura Russina Margarita Kurig Heisi Härk Eneli Aruväli Jaan Tallo Indrek Embs Jan P. Lust Enn The ortho-para transition, confinement and self-diffusion of H2 in three distinct carbide-derived carbons by quasi- and inelastic neutron scattering EPJ Web of Conferences |
| title | The ortho-para transition, confinement and self-diffusion of H2 in three distinct carbide-derived carbons by quasi- and inelastic neutron scattering |
| title_full | The ortho-para transition, confinement and self-diffusion of H2 in three distinct carbide-derived carbons by quasi- and inelastic neutron scattering |
| title_fullStr | The ortho-para transition, confinement and self-diffusion of H2 in three distinct carbide-derived carbons by quasi- and inelastic neutron scattering |
| title_full_unstemmed | The ortho-para transition, confinement and self-diffusion of H2 in three distinct carbide-derived carbons by quasi- and inelastic neutron scattering |
| title_short | The ortho-para transition, confinement and self-diffusion of H2 in three distinct carbide-derived carbons by quasi- and inelastic neutron scattering |
| title_sort | ortho para transition confinement and self diffusion of h2 in three distinct carbide derived carbons by quasi and inelastic neutron scattering |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2023/12/epjconf_ecns2023_05001.pdf |
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