New Insight on the Hydrogen Absorption Evolution of the Mg–Fe–H System under Equilibrium Conditions

Mg₂FeH₆ is regarded as potential hydrogen and thermochemical storage medium due to its high volumetric hydrogen (150 kg/m³) and energy (0.49 kWh/L) densities. In this work, the mechanism of formation of Mg₂FeH₆ under equilibrium conditions is thoroughly investigated applying volumetric measurements,...

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Autores principales:	Puszkiel, Julián, Castro Riglos, M., Ramallo López, José Martín, Mizrahi, Martín D., Gemming, Thomas, Pistidda, Claudio, Arneodo Larochette, Pierre, Bellosta von Colbe, José, Klassen, Thomas, Dornheim, Martin, Gennari, Fabiana
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2018
Materias:	Química Física Magnesium-iron complex hydride Equilibrium conditions Transmission electron microscopy X-ray spectroscopy Hydrogen-energy storage
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/125382 https://www.mdpi.com/2075-4701/8/11/967
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-125382
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Química Física Magnesium-iron complex hydride Equilibrium conditions Transmission electron microscopy X-ray spectroscopy Hydrogen-energy storage
spellingShingle	Química Física Magnesium-iron complex hydride Equilibrium conditions Transmission electron microscopy X-ray spectroscopy Hydrogen-energy storage Puszkiel, Julián Castro Riglos, M. Ramallo López, José Martín Mizrahi, Martín D. Gemming, Thomas Pistidda, Claudio Arneodo Larochette, Pierre Bellosta von Colbe, José Klassen, Thomas Dornheim, Martin Gennari, Fabiana New Insight on the Hydrogen Absorption Evolution of the Mg–Fe–H System under Equilibrium Conditions
topic_facet	Química Física Magnesium-iron complex hydride Equilibrium conditions Transmission electron microscopy X-ray spectroscopy Hydrogen-energy storage
description	Mg₂FeH₆ is regarded as potential hydrogen and thermochemical storage medium due to its high volumetric hydrogen (150 kg/m³) and energy (0.49 kWh/L) densities. In this work, the mechanism of formation of Mg₂FeH₆ under equilibrium conditions is thoroughly investigated applying volumetric measurements, X-ray diffraction (XRD), X-ray absorption near edge structure (XANES), and the combination of scanning transmission electron microscopy (STEM) with energy-dispersive X-ray spectroscopy (EDS) and high-resolution transmission electron microscopy (HR-TEM). Starting from a 2Mg:Fe stoichiometric powder ratio, thorough characterizations of samples taken at different states upon hydrogenation under equilibrium conditions confirm that the formation mechanism of Mg₂FeH6 occurs from elemental Mg and Fe by columnar nucleation of the complex hydride at boundaries of the Fe seeds. The formation of MgH₂ is enhanced by the presence of Fe. However, MgH₂ does not take part as intermediate for the formation of Mg₂FeH₆ and acts as solid-solid diffusion barrier which hinders the complete formation of Mg₂FeH₆. This work provides novel insight about the formation mechanism of Mg₂FeH₆.
format	Articulo Articulo
author	Puszkiel, Julián Castro Riglos, M. Ramallo López, José Martín Mizrahi, Martín D. Gemming, Thomas Pistidda, Claudio Arneodo Larochette, Pierre Bellosta von Colbe, José Klassen, Thomas Dornheim, Martin Gennari, Fabiana
author_facet	Puszkiel, Julián Castro Riglos, M. Ramallo López, José Martín Mizrahi, Martín D. Gemming, Thomas Pistidda, Claudio Arneodo Larochette, Pierre Bellosta von Colbe, José Klassen, Thomas Dornheim, Martin Gennari, Fabiana
author_sort	Puszkiel, Julián
title	New Insight on the Hydrogen Absorption Evolution of the Mg–Fe–H System under Equilibrium Conditions
title_short	New Insight on the Hydrogen Absorption Evolution of the Mg–Fe–H System under Equilibrium Conditions
title_full	New Insight on the Hydrogen Absorption Evolution of the Mg–Fe–H System under Equilibrium Conditions
title_fullStr	New Insight on the Hydrogen Absorption Evolution of the Mg–Fe–H System under Equilibrium Conditions
title_full_unstemmed	New Insight on the Hydrogen Absorption Evolution of the Mg–Fe–H System under Equilibrium Conditions
title_sort	new insight on the hydrogen absorption evolution of the mg–fe–h system under equilibrium conditions
publishDate	2018
url	http://sedici.unlp.edu.ar/handle/10915/125382 https://www.mdpi.com/2075-4701/8/11/967
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bdutipo_str	Repositorios
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New Insight on the Hydrogen Absorption Evolution of the Mg–Fe–H System under Equilibrium Conditions

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