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Changes of Structural and Hydrogen Desorption Properties of MgH2 Indused by Ion Irradiation

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Abstract

Changes in structural and hydrogen desorption properties of MgH2 iduced by ion irradiation have been investigated. MgH2 powder samples have been irradiated with 45 keV B3+ and 120 keV Ar8+ions, with ion fluence 1015 ions/cm2. The effects of ion irradiation are estimated by numerical calculations using SRIM package. The induced material modifications and their consequences on hydrogen dynamics in the system are investigated by XRD, particle size distribution and TPD techniques. Changes of TPD spectra with irradiation conditions suggest that there are several mechanisms involved in desorption process which depend on defect concentration and their interaction and ordering. The results confirmed that the near-surface area of MgH2 and formation of a substoichiometric MgHx (x<2) play the crucial role in hydrogen kinetics and that various concentrations of induced defects substantially influence H diffusion and desorption kinetics in MgH2. The results also confirm that there is possibility to control the thermodynamic parameters by controlling vacancies concentration in the systems.

Credits

Ljiljana Lj. Matović, Nikola B. Novaković, Nenad B. Ivanović, Jasmina D. Grbović Novaković.

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Publications

1.Ljiljana Matović, Nikola Novaković, Sandra Kurko, Milorad Šiljegović, Branko Matović, Zorica Kačarević Popović, Nebojša Romčević, Nenad Ivanović, Jasmina Grbović Novaković,
Structural destabilisation of MgH2 obtained by heavy ion irradiation,
International Journal of Hydrogen Energy, 34(2009)7275-7282
2. Sandra Kurko, Ljiljana Matović, Nikola Novaković, Branko Matović, Zoran Jovanović, Bojana Paskaš Mamula, Jasmina Grbović Novaković
Changes of Hydrogen Storage Properties of MgH2 Induced by Boron Ion Irradiation
International Journal of Hydrogen Energy 36(2011)1184-1189

Cite this work

Researchers should cite this work as follows:

  • 1.Ljiljana Matović, Nikola Novaković, Sandra Kurko, Milorad Šiljegović, Branko Matović, Zorica Kačarević Popović, Nebojša Romčević, Nenad Ivanović, Jasmina Grbović Novaković,
    Structural destabilisation of MgH2 obtained by heavy ion irradiation,
    International Journal of Hydrogen Energy, 34(2009)7275-7282
    2. Sandra Kurko, Ljiljana Matović, Nikola Novaković, Branko Matović, Zoran Jovanović, Bojana Paskaš Mamula, Jasmina Grbović Novaković
    Changes of Hydrogen Storage Properties of MgH2 Induced by Boron Ion Irradiation
    International Journal of Hydrogen Energy 36(2011)1184-1189
  • Sandra Kurko (2012), "Changes of Structural and Hydrogen Desorption Properties of MgH2 Indused by Ion Irradiation," http://nanohub.org/resources/12853.

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