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Mg2NiH4 synthesis and decomposition reactions

Polanski, M. ; Nielsen, T. K. ; Kunce, I. ; Norek, M. ; Plocinski, T. ; Jaroszewicz, L. R. ; Gundlach, Carsten LU ; Jensen, T. R. and Bystrzycki, J. (2013) In International Journal of Hydrogen Energy 38(10). p.4003-4010
Abstract
A ternary Mg2NiH4 hydride was synthesized using method that relies on a relatively short mechanical milling time (one hour) of a 2:1 MgH2-Ni powder mixture followed by sintering at a sufficiently high hydrogen pressure (>85 bar) and temperature (>400 degrees C). The ternary hydride forms in less than 2.5 h (including the milling time) with a yield of similar to 90% as a mixture of two polymorphic forms. The mechanisms of formation and decomposition of ternary Mg2NiH4 under different hydrogen pressures were studied in detail using an in situ synchrotron radiation powder X-ray diffraction (SR-PXD) and high pressure DSC. The obtained experimental results are supported by morphological and microstructural investigations performed using... (More)
A ternary Mg2NiH4 hydride was synthesized using method that relies on a relatively short mechanical milling time (one hour) of a 2:1 MgH2-Ni powder mixture followed by sintering at a sufficiently high hydrogen pressure (>85 bar) and temperature (>400 degrees C). The ternary hydride forms in less than 2.5 h (including the milling time) with a yield of similar to 90% as a mixture of two polymorphic forms. The mechanisms of formation and decomposition of ternary Mg2NiH4 under different hydrogen pressures were studied in detail using an in situ synchrotron radiation powder X-ray diffraction (SR-PXD) and high pressure DSC. The obtained experimental results are supported by morphological and microstructural investigations performed using SEM and high resolution STEM. Additionally, effects occurring during the desorption reaction were studied using DSC coupled with mass spectrometry. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. (Less)
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type
Contribution to journal
publication status
published
subject
keywords
Magnesium nickel hydride, Synthesis, Decomposition, In situ synchrotron, radiation powder diffraction, High pressure DSC, Structure
in
International Journal of Hydrogen Energy
volume
38
issue
10
pages
4003 - 4010
publisher
Elsevier
external identifiers
  • wos:000316714200020
  • scopus:84875213773
ISSN
1879-3487
DOI
10.1016/j.ijhydene.2013.01.119
language
English
LU publication?
yes
id
1123897d-27fa-4788-8ba3-db70967a680f (old id 3749651)
date added to LUP
2016-04-01 13:24:21
date last changed
2020-10-07 03:02:43
@article{1123897d-27fa-4788-8ba3-db70967a680f,
  abstract     = {A ternary Mg2NiH4 hydride was synthesized using method that relies on a relatively short mechanical milling time (one hour) of a 2:1 MgH2-Ni powder mixture followed by sintering at a sufficiently high hydrogen pressure (>85 bar) and temperature (>400 degrees C). The ternary hydride forms in less than 2.5 h (including the milling time) with a yield of similar to 90% as a mixture of two polymorphic forms. The mechanisms of formation and decomposition of ternary Mg2NiH4 under different hydrogen pressures were studied in detail using an in situ synchrotron radiation powder X-ray diffraction (SR-PXD) and high pressure DSC. The obtained experimental results are supported by morphological and microstructural investigations performed using SEM and high resolution STEM. Additionally, effects occurring during the desorption reaction were studied using DSC coupled with mass spectrometry. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.},
  author       = {Polanski, M. and Nielsen, T. K. and Kunce, I. and Norek, M. and Plocinski, T. and Jaroszewicz, L. R. and Gundlach, Carsten and Jensen, T. R. and Bystrzycki, J.},
  issn         = {1879-3487},
  language     = {eng},
  number       = {10},
  pages        = {4003--4010},
  publisher    = {Elsevier},
  series       = {International Journal of Hydrogen Energy},
  title        = {Mg2NiH4 synthesis and decomposition reactions},
  url          = {http://dx.doi.org/10.1016/j.ijhydene.2013.01.119},
  doi          = {10.1016/j.ijhydene.2013.01.119},
  volume       = {38},
  year         = {2013},
}