Crystal structure of nanocrystalline Pr5Co19 compound and its hydrogen storage properties
| Autor: | Loïc Patout, Najeh Mliki, Ahmed Charaï, Lotfi Bessais, W. Bouzidi |
|---|---|
| Přispěvatelé: | Institut des Matériaux, de Microélectronique et des Nanosciences de Provence (IM2NP), Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), Laboratoire de thermodynamique, propriétés électriques, contraintes, structures aux échelles nanométriques (TECSEN), Université Paul Cézanne - Aix-Marseille 3-Centre National de la Recherche Scientifique (CNRS), Chimie métallurgique des terres rares (CMTR), Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Diffraction
[PHYS]Physics [physics] Materials science Hydrogen Renewable Energy Sustainability and the Environment Intermetallic Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Crystal structure 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Nanocrystalline material 0104 chemical sciences Hydrogen storage Crystallography Fuel Technology chemistry Transmission electron microscopy 0210 nano-technology Anisotropy ComputingMilieux_MISCELLANEOUS |
| Zdroj: | International Journal of Hydrogen Energy International Journal of Hydrogen Energy, Elsevier, 2020, 45 (19), pp.11190-11198. ⟨10.1016/j.ijhydene.2020.02.079⟩ International Journal of Hydrogen Energy, 2020, 45 (19), pp.11190-11198. ⟨10.1016/j.ijhydene.2020.02.079⟩ |
| ISSN: | 0360-3199 |
| Popis: | The present study focuses on the structure and pressure-composition (P–C) isotherm measurements of nanocrystalline Pr5Co19 hydrides. The crystal structure and hydrogenation properties of Pr5Co19 are investigated by X-ray diffraction, refined using Rietveld method, and by transmission electron microscopy (TEM). This intermetallic compound crystallizes in the rhombohedral (3R) with Ce5Co19-type structure. The pressure-composition isotherm of Pr5Co19 was measured at room temperature. A single plateau was observed during the absorption-desorption process, the reversible hydrogen capacity reached 10 H/f.u (0.4 H/M). A peak broadening was observed in the X-ray diffraction (XRD) profile after hydrogenation, with no detection of any amorphous phase. The crystal structure of the Pr5Co19Hx hydrides has not been changed, it always conserves the rhombohedral structure (space group R 3 ¯ m ). The lattice parameters have increased with hydrogen content leading to an anisotropic expansion of the unit cell volume. |
| Databáze: | OpenAIRE |
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