Tribochemically driven dehydrogenation of undoped sodium alanate under room temperature
| العنوان: | Tribochemically driven dehydrogenation of undoped sodium alanate under room temperature |
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| المؤلفون: | Esmeralda Muñoz-Cortés, Olga L. Ibryaeva, Miguel Manso Silvan, Borja Zabala, Eduardo Flores, Almudena Gutierrez, Jose Ramon Ares, Roman Nevshupa |
| المساهمون: | Ministerio de Ciencia e Innovación (España), Nevshupa, Roman, Eusko Jaurlaritza, UAM. Departamento de Física Aplicada, UAM. Departamento de Física de Materiales |
| المصدر: | Physical Chemistry Chemical Physics. 25:494-508 |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2023. |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | Dehydrogenation Reactions, Sodium, Física, General Physics and Astronomy, Physical and Theoretical Chemistry, Aluminum Compounds, Sodium Compounds, Mechanical Force |
| الوصف: | n application of mechanical energy was explored as a new non-thermal method to drive H2 emission from undoped sodium alanate at room temperature. It was found that mild rubbing of NaAlH4 pellets under vacuum led to intensive and almost instantaneous gas emission. The dominating species in the emitted gases was H2 (>99%). Traces of mono- and polyalanes, NaAlH4 vapours, CO2 and other non-identified gases were registered. H2 emission involved several first-order processes, whose characteristic time constants ranged widely from 0.6 to 465 s. None of the dehydrogenation reactions could be connected to either the thermal effect of friction or the direct coupling of mechanical forces to the energy landscape of chemical reactions. In turn, it was suggested that the tribochemical reactions can be triggered by plastic deformation and shearing. A linked diffusion-wear model of NaAlH4 triboinduced dehydrogenation, which consistently explains all empirical findings, was put forward. This work was financially supported by the Ministry of Science and Innovation of Spain (grants PID2019-111063RB-I00, PID2020-112770RB-C22 and RTI2018-099794-B-I00) and the Basque Government via the EMAITEK Plus 2020 programme. |
| وصف الملف: | application/pdf |
| تدمد: | 1463-9084 1463-9076 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::72db2e5ef56686d3611eeeaf966719e4 https://doi.org/10.1039/d2cp04681d |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....72db2e5ef56686d3611eeeaf966719e4 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14639084 14639076 |
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