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Sorption behavior of the MgH2-Mg2FeH6 hydride storage system synthesized by mechanical milling followed by sintering

Puszkiel, Julian; Gennari, Fabiana; Larochette, Pierre Arneodo; Karimi, Fahim; Pistidda, Claudio; Gosalawit-Utke, Rapee; Jepsen, Julian; Jensen, Torben R.; Gundlach, Carsten LU and von Colbe, Jose Bellosta, et al. (2013) In International Journal of Hydrogen Energy 38(34). p.14618-14630
Abstract
The hydrogen sorption behavior of the Mg2FeH6-MgH2 hydride system is investigated via in-situ synchrotron and laboratory powder X-ray diffraction (SR-PXD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), particle size distribution (PSD) and volumetric techniques. The Mg2FeH6-MgH2 hydride system is obtained by mechanical milling in argon atmosphere followed by sintering at high temperature and hydrogen pressure. In-situ SR-PXD results show that upon hydriding MgH2 is a precursor for Mg2FeH6 formation and remained as hydrided phase in the obtained material. Diffusion constraints preclude the further formation of Mg2FeH6. Upon dehydriding, our results suggest that MgH2 and Mg2FeH6 decompose independently in a... (More)
The hydrogen sorption behavior of the Mg2FeH6-MgH2 hydride system is investigated via in-situ synchrotron and laboratory powder X-ray diffraction (SR-PXD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), particle size distribution (PSD) and volumetric techniques. The Mg2FeH6-MgH2 hydride system is obtained by mechanical milling in argon atmosphere followed by sintering at high temperature and hydrogen pressure. In-situ SR-PXD results show that upon hydriding MgH2 is a precursor for Mg2FeH6 formation and remained as hydrided phase in the obtained material. Diffusion constraints preclude the further formation of Mg2FeH6. Upon dehydriding, our results suggest that MgH2 and Mg2FeH6 decompose independently in a narrow temperature range between 275 and 300 degrees C. Moreover, the decomposition behavior of both hydrides in the Mg2FeH6-MgH2 hydride mixture is influenced by each other via dual synergetic-destabilizing effects. The final hydriding/dehydriding products and therefore the kinetic behavior of the Mg2FeH6-MgH2 hydride system exhibits a strong dependence on the temperature and pressure conditions. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. (Less)
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subject
keywords
Hydride mixture, Magnesium hydride, Complex hydride, Reaction path, Desorption kinetics
in
International Journal of Hydrogen Energy
volume
38
issue
34
pages
14618 - 14630
publisher
Elsevier
external identifiers
  • wos:000328517700024
  • scopus:84886728935
ISSN
1879-3487
DOI
10.1016/j.ijhydene.2013.08.068
language
English
LU publication?
yes
id
6c984dd1-4c6f-43a5-b9d6-a3bcf0900573 (old id 4272050)
date added to LUP
2014-02-11 13:57:56
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2019-01-06 09:02:57
@article{6c984dd1-4c6f-43a5-b9d6-a3bcf0900573,
  abstract     = {The hydrogen sorption behavior of the Mg2FeH6-MgH2 hydride system is investigated via in-situ synchrotron and laboratory powder X-ray diffraction (SR-PXD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), particle size distribution (PSD) and volumetric techniques. The Mg2FeH6-MgH2 hydride system is obtained by mechanical milling in argon atmosphere followed by sintering at high temperature and hydrogen pressure. In-situ SR-PXD results show that upon hydriding MgH2 is a precursor for Mg2FeH6 formation and remained as hydrided phase in the obtained material. Diffusion constraints preclude the further formation of Mg2FeH6. Upon dehydriding, our results suggest that MgH2 and Mg2FeH6 decompose independently in a narrow temperature range between 275 and 300 degrees C. Moreover, the decomposition behavior of both hydrides in the Mg2FeH6-MgH2 hydride mixture is influenced by each other via dual synergetic-destabilizing effects. The final hydriding/dehydriding products and therefore the kinetic behavior of the Mg2FeH6-MgH2 hydride system exhibits a strong dependence on the temperature and pressure conditions. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.},
  author       = {Puszkiel, Julian and Gennari, Fabiana and Larochette, Pierre Arneodo and Karimi, Fahim and Pistidda, Claudio and Gosalawit-Utke, Rapee and Jepsen, Julian and Jensen, Torben R. and Gundlach, Carsten and von Colbe, Jose Bellosta and Klassen, Thomas and Dornheim, Martin},
  issn         = {1879-3487},
  keyword      = {Hydride mixture,Magnesium hydride,Complex hydride,Reaction path,Desorption kinetics},
  language     = {eng},
  number       = {34},
  pages        = {14618--14630},
  publisher    = {Elsevier},
  series       = {International Journal of Hydrogen Energy},
  title        = {Sorption behavior of the MgH2-Mg2FeH6 hydride storage system synthesized by mechanical milling followed by sintering},
  url          = {http://dx.doi.org/10.1016/j.ijhydene.2013.08.068},
  volume       = {38},
  year         = {2013},
}