2024-03-29T09:02:42Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/48342023-03-31T12:34:57Zcom_10259_4759com_10259_2604col_10259_4760
Senes, Nina .
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500
Fernández Albanesi, Luisa .
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500
Garroni, Sebastiano
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500
0000-0001-7686-6589
Santoru, Antonio .
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500
Pistidda, Claudio .
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500
Mulas, Gabriele
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Enzo, Stefano
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Gennari, Fabiana C.
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2018-07-03T11:37:37Z
2018-10
2020-10
0925-8388
http://hdl.handle.net/10259/4834
10.1016/j.jallcom.2018.06.262
Recent investigations showed the formation of new amide-chloride phases between LiNH2 and AlCl3 after milling and/or heating under hydrogen pressure. These phases exhibited a key role in the improvement of the hydrogen storage properties of the LiNH2-LiH composite. In the present work, we studied the effects of Al and AlCl3 additives on the hydrogen storage behavior of the Li-Mg-N-H system. The dehydrogenation kinetics and the reaction pathway of Al and AlCl3 modified LiNH2-MgH2 composite were investigated through a combination of kinetic measurements and structural analyses. During the first cycle, the addition of Al catalytically accelerates the hydrogen release at 200 °C. In the subsequent cycles, the formation of a new phase of unknown nature is probably responsible for both increased equilibrium hydrogen pressure and decreased dehydrogenation rate. In contrast, AlCl3 additive reacts with LiNH2-MgH2 through the milling and continues during heating under hydrogen pressure. Addition of AlCl3 leads to the formation of two cubic structures identified in the Li-Al-N-H-Cl system, which improves dehydrogenation rate by modifying the thermodynamic stability of the material. This study evidences positive effect of cation and/or anion substitution on hydrogen storage properties of the Li-Mg-N-H system.
This study has been partially supported by bilateral collaboration Project MINCyT-MAE
application/pdf
eng
Elsevier
Journal of Alloys and Compounds. 2018, V. 765, p. 635–643
https://doi.org/10.1016/j.jallcom.2018.06.262
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Hydrogen absorbing materials
Mechanochemical processing
Kinetics
Diffusion
Crystal structure
Materia-Estructura
Matter-Constitution
Kinetics and hydrogen storage performance of Li-Mg-N-H systems doped with Al and AlCl3
info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
CC-LICENSE
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Senes-JAC_2018.pdf
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Senes-JAC_2018.pdf.txt
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10259/4834
oai:riubu.ubu.es:10259/4834
2023-03-31 14:34:57.952
Repositorio Institucional de la Universidad de Burgos
bubrep@ubu.es
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