Hydrogen desorption properties of magnesium hydride catalyzed multiply with carbon and silicon

Alicja Klimkowicz, Akito Takasaki, Łukasz Gondek, Henryk Figiel, Konrad ͆wierczek

研究成果: Article

4 引用 (Scopus)

抄録

Abstract Magnesium hydride (MgH<inf>2</inf>) is considered as one of hydrogen storage materials. However, the application is limited because of slow hydrogen kinetics and high thermodynamic stability. In this study, MgH<inf>2</inf> powders were mechanically milled with graphite (C) and/or silicon (Si) powders, and effect of multiple addition of C and Si on hydrogen desorption properties was investigated. The multiple addition caused a decrease of the hydrogen desorption (onset and peak) temperatures more than single addition, and the lowest activation energy for hydrogen desorption, 62 kJ/mol, was obtained from sample powders of (2 mol MgH<inf>2</inf> + 0.5 mol C + 0.5 mol Si). The surface of the sample powders after mechanical milling revealed a good distribution of C on the MgH<inf>2</inf> surface and a presence of finer Si particles.

元の言語English
記事番号33242
ページ(範囲)S80-S83
ジャーナルJournal of Alloys and Compounds
645
発行部数S1
DOI
出版物ステータスPublished - 2015 8 11

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Silicon
Hydrides
Powders
Magnesium
Hydrogen
Desorption
Carbon
Distribution of goods
Graphite
Hydrogen storage
Thermodynamic stability
Activation energy
Kinetics
Temperature

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

これを引用

Hydrogen desorption properties of magnesium hydride catalyzed multiply with carbon and silicon. / Klimkowicz, Alicja; Takasaki, Akito; Gondek, Łukasz; Figiel, Henryk; ͆wierczek, Konrad.

:: Journal of Alloys and Compounds, 巻 645, 番号 S1, 33242, 11.08.2015, p. S80-S83.

研究成果: Article

Klimkowicz, Alicja ; Takasaki, Akito ; Gondek, Łukasz ; Figiel, Henryk ; ͆wierczek, Konrad. / Hydrogen desorption properties of magnesium hydride catalyzed multiply with carbon and silicon. :: Journal of Alloys and Compounds. 2015 ; 巻 645, 番号 S1. pp. S80-S83.
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N2 - Abstract Magnesium hydride (MgH2) is considered as one of hydrogen storage materials. However, the application is limited because of slow hydrogen kinetics and high thermodynamic stability. In this study, MgH2 powders were mechanically milled with graphite (C) and/or silicon (Si) powders, and effect of multiple addition of C and Si on hydrogen desorption properties was investigated. The multiple addition caused a decrease of the hydrogen desorption (onset and peak) temperatures more than single addition, and the lowest activation energy for hydrogen desorption, 62 kJ/mol, was obtained from sample powders of (2 mol MgH2 + 0.5 mol C + 0.5 mol Si). The surface of the sample powders after mechanical milling revealed a good distribution of C on the MgH2 surface and a presence of finer Si particles.

AB - Abstract Magnesium hydride (MgH2) is considered as one of hydrogen storage materials. However, the application is limited because of slow hydrogen kinetics and high thermodynamic stability. In this study, MgH2 powders were mechanically milled with graphite (C) and/or silicon (Si) powders, and effect of multiple addition of C and Si on hydrogen desorption properties was investigated. The multiple addition caused a decrease of the hydrogen desorption (onset and peak) temperatures more than single addition, and the lowest activation energy for hydrogen desorption, 62 kJ/mol, was obtained from sample powders of (2 mol MgH2 + 0.5 mol C + 0.5 mol Si). The surface of the sample powders after mechanical milling revealed a good distribution of C on the MgH2 surface and a presence of finer Si particles.

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