On the Problem of “Super” Storage of Hydrogen in Graphite Nanofibers
This article is devoted to some fundamental aspects of “super” storage in graphite nanofibers (GNF) of “reversible” (~20–30 wt.%) and “irreversible” hydrogen (~7–10 wt.%). Extraordinary results for hydrogen “super” storage were previously published by the group of Rodriguez and Baker at the turn of...
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MDPI AG
2022-03-01
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| Online Access: | https://www.mdpi.com/2311-5629/8/2/23 |
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| author | Yury S. Nechaev Evgeny A. Denisov Alisa O. Cheretaeva Nadezhda A. Shurygina Ekaterina K. Kostikova Andreas Öchsner Sergei Yu. Davydov |
| author_facet | Yury S. Nechaev Evgeny A. Denisov Alisa O. Cheretaeva Nadezhda A. Shurygina Ekaterina K. Kostikova Andreas Öchsner Sergei Yu. Davydov |
| author_sort | Yury S. Nechaev |
| collection | DOAJ |
| description | This article is devoted to some fundamental aspects of “super” storage in graphite nanofibers (GNF) of “reversible” (~20–30 wt.%) and “irreversible” hydrogen (~7–10 wt.%). Extraordinary results for hydrogen “super” storage were previously published by the group of Rodriguez and Baker at the turn of the century, which been unable to be reproduced or explained in terms of physics by other researchers. For the first time, using an efficient method of processing and analysis of hydrogen thermal desorption spectra, the characteristics of the main desorption peak of “irreversible” hydrogen in GNF were determined: the temperature of the highest desorption rate (<i>T</i><sub>max</sub> = 914–923 K), the activation energy of the desorption process (<i>Q</i> ≈ 40 kJ mol<sup>−1</sup>), the pre-exponential rate constant factor (<i>K</i><sub>0</sub> ≈ 2 × 10<sup>−1</sup> s<sup>−1</sup>), and the amount of hydrogen released (~8 wt.%). The physics of hydrogen “super” sorption includes hydrogen diffusion, accompanied by the “reversible” capture of the diffusant by certain sorption “centers”; the hydrogen spillover effect, which provides local atomization of gaseous H<sub>2</sub> during GNF hydrogenation; and the Kurdjumov phenomenon on thermoelastic phase equilibrium. It is shown that the above-mentioned extraordinary data on the hydrogen “super” storage in GNFs are neither a mistake nor a mystification, as most researchers believe. |
| first_indexed | 2024-03-10T00:11:55Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 2311-5629 |
| language | English |
| last_indexed | 2024-03-10T00:11:55Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | C |
| spelling | doaj.art-3c4d733590e5485e9c00d703c99fb7ac2023-11-23T15:58:25ZengMDPI AGC2311-56292022-03-01822310.3390/c8020023On the Problem of “Super” Storage of Hydrogen in Graphite NanofibersYury S. Nechaev0Evgeny A. Denisov1Alisa O. Cheretaeva2Nadezhda A. Shurygina3Ekaterina K. Kostikova4Andreas Öchsner5Sergei Yu. Davydov6G.V. Kurdjumov Centre of Metals Science and Physics, I.P. Bardin Research Institute for Ferrous Metallurgy, Radio Str., 23/9, Build. 2, 105005 Moscow, RussiaSolid State Electronics Department, St. Petersburg State University, Universitetskaya Nab. 7/9, 198904 St. Petersburg, RussiaResearch Institute of Progressive Technologies, Togliatti State University, Belorusskaya Str., 14, 445020 Togliatti, RussiaG.V. Kurdjumov Centre of Metals Science and Physics, I.P. Bardin Research Institute for Ferrous Metallurgy, Radio Str., 23/9, Build. 2, 105005 Moscow, RussiaInstitute of Applied Mathematical Research, Karelian Research Centre of the Russian Academy of Science, Pushkinskaya Str., 11, 185910 Petrozavodsk, RussiaFaculty of Mechanical and Systems Engineering, Esslingen University of Applied Sciences, Kanalstrasse, 33, 73728 Esslingen, GermanyIoffe Physical Technical Institute, RAS, Polytechnicheskaya Str., 26, 194021 St. Petersburg, RussiaThis article is devoted to some fundamental aspects of “super” storage in graphite nanofibers (GNF) of “reversible” (~20–30 wt.%) and “irreversible” hydrogen (~7–10 wt.%). Extraordinary results for hydrogen “super” storage were previously published by the group of Rodriguez and Baker at the turn of the century, which been unable to be reproduced or explained in terms of physics by other researchers. For the first time, using an efficient method of processing and analysis of hydrogen thermal desorption spectra, the characteristics of the main desorption peak of “irreversible” hydrogen in GNF were determined: the temperature of the highest desorption rate (<i>T</i><sub>max</sub> = 914–923 K), the activation energy of the desorption process (<i>Q</i> ≈ 40 kJ mol<sup>−1</sup>), the pre-exponential rate constant factor (<i>K</i><sub>0</sub> ≈ 2 × 10<sup>−1</sup> s<sup>−1</sup>), and the amount of hydrogen released (~8 wt.%). The physics of hydrogen “super” sorption includes hydrogen diffusion, accompanied by the “reversible” capture of the diffusant by certain sorption “centers”; the hydrogen spillover effect, which provides local atomization of gaseous H<sub>2</sub> during GNF hydrogenation; and the Kurdjumov phenomenon on thermoelastic phase equilibrium. It is shown that the above-mentioned extraordinary data on the hydrogen “super” storage in GNFs are neither a mistake nor a mystification, as most researchers believe.https://www.mdpi.com/2311-5629/8/2/23graphite nanofibers“super” storage of “reversible” and “irreversible” hydrogenthermal desorption and thermogravimetric dataefficient analysis methodologycharacteristics and physics of sorption processes |
| spellingShingle | Yury S. Nechaev Evgeny A. Denisov Alisa O. Cheretaeva Nadezhda A. Shurygina Ekaterina K. Kostikova Andreas Öchsner Sergei Yu. Davydov On the Problem of “Super” Storage of Hydrogen in Graphite Nanofibers C graphite nanofibers “super” storage of “reversible” and “irreversible” hydrogen thermal desorption and thermogravimetric data efficient analysis methodology characteristics and physics of sorption processes |
| title | On the Problem of “Super” Storage of Hydrogen in Graphite Nanofibers |
| title_full | On the Problem of “Super” Storage of Hydrogen in Graphite Nanofibers |
| title_fullStr | On the Problem of “Super” Storage of Hydrogen in Graphite Nanofibers |
| title_full_unstemmed | On the Problem of “Super” Storage of Hydrogen in Graphite Nanofibers |
| title_short | On the Problem of “Super” Storage of Hydrogen in Graphite Nanofibers |
| title_sort | on the problem of super storage of hydrogen in graphite nanofibers |
| topic | graphite nanofibers “super” storage of “reversible” and “irreversible” hydrogen thermal desorption and thermogravimetric data efficient analysis methodology characteristics and physics of sorption processes |
| url | https://www.mdpi.com/2311-5629/8/2/23 |
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