Mg2NiH4 synthesis and decomposition reactions

M. Polanski , T.K. Nielsen , I. Kunce , M. Norek , Tomasz Płociński , Jakub Jaroszewicz , L.R. Gundlach , T.R. Jensen , J. Bystrzycki


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 °C). The ternary hydride forms in less than 2.5 h (including the milling time) with a yield of ∼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. © 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Author M. Polanski - [Wojskowa Akademia Techniczna]
M. Polanski,,
, T.K. Nielsen - [Aarhus Universitet]
T.K. Nielsen,,
, I. Kunce - [Wojskowa Akademia Techniczna]
I. Kunce,,
, M. Norek - [Wojskowa Akademia Techniczna]
M. Norek,,
, Tomasz Płociński (FMSE / DMD)
Tomasz Płociński,,
- Division of Materials Design
, Jakub Jaroszewicz (FMSE)
Jakub Jaroszewicz,,
- Faculty of Materials Science and Engineering
, L.R. Gundlach
L.R. Gundlach,,
, T.R. Jensen - [Aarhus Universitet]
T.R. Jensen,,
, J. Bystrzycki - [Wojskowa Akademia Techniczna]
J. Bystrzycki,,
Journal seriesInternational Journal of Hydrogen Energy, ISSN 0360-3199
Issue year2013
Publication size in sheets0.5
Keywords in EnglishDecomposition; High pressure DSC; In situ synchrotron radiation powder diffraction; Magnesium nickel hydride; Structure; Synthesis
ASJC Classification2102 Energy Engineering and Power Technology; 3104 Condensed Matter Physics; 2103 Fuel Technology; 2105 Renewable Energy, Sustainability and the Environment
Languageen angielski
Mg2NiH4-synthesis-and-decomposition-re_2013_International-Journal-of-Hydroge.pdf 1.49 MB
Score (nominal)35
Score sourcejournalList
ScoreMinisterial score = 35.0, 30-07-2020, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 30-07-2020, ArticleFromJournal
Publication indicators WoS Citations = 25; Scopus Citations = 24; GS Citations = 31.0; Scopus SNIP (Source Normalised Impact per Paper): 2013 = 1.442; WoS Impact Factor: 2013 = 2.93 (2) - 2013=3.448 (5)
Citation count*32 (2020-09-15)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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