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.

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

[1] Schlapbach L, Zuttel A. Hydrogen-storage materials for mobile applications. Nature 414 (2001) 353-358.

[2] Bobet J-L, Even C, Nakamura Y, Akiba E, Darriet B. Synthesis of magnesium and titanium hydride via reactive mechanical alloying. Influence of 3d-metal addition on MgH2 synthesize. J Alloys Comp. 298 (2000) 279–284.

[3] R.A. Varin, T. Czujko, Z.Wronski, Particle size, grain size and γ-MgH2 effects on the desorption properties of nanocrystalline commercial magnesium hydride processed by controlled mechanical milling Nanotechnology 17 (2006) 3856-3865.
[4] Gross KJ, Chartouni D, Leroy E, Zuttel A, Schlapbach L. Mechanically milled Mg composites for hydrogen storage: the relationship between morphology and kinetics. J Alloys Compd 269 (1998) 259–270.

[5] Montone A, Grbović J, Stamenković Lj, Fiorini A.L, Pasquini L, Bonetti E, Vittori Antisari M. Desorption Behaviour in Nanostructured MgH2-Co. Mat. Sci. Forum 518 (2006) 79-84.

[6] K.-F. Aguey-Zinsou, J.R. Ares Fernandez, T. Klassen, R. Bormann. Effect of Nb2O5 on MgH2 properties during mechanical milling. Int. J. Hydrogen Energ 32 (2007) 2400 – 2407.

[7] Montone A, Grbovic Novakovic J, Vittori Antisari M, Bassetti A, Bonetti E, Fiorini A.L, Pasquini L, Mirenghi L, Rotolo P. Nano-microMgH2 - Mg2NiH4 composites: Tayloring a multichannel system with selected hydrogen sorption properties. Int. J. Hydrogen Energ 32 (2007) 2926 – 2934.

[8] Matović Lj, Novaković N, Kurko S, Šiljegović M, Matović B, Romčević N, Ivanović N, Grbović Novaković J. Structural destabilisation of MgH2 obtained by heavy
ion irradiation. Int J Hydrogen Energ 34 (2009) 7275-7282.

[9] Grbović Novaković J, Matović Lj, Drvendžija M, Novaković N, Rajnović D, Šiljegovć M, Kačarević Popović Z, Milovanović S, Ivanović N. Changes of hydrogen storage properties of MgH2 induced by heavy ion irradiation. Int J Hydrogen Energ 33 (2008) 1876-1879.

[10] M. Nastasi, J.W. Mayer, Ion Implantation and Synthesis of Materials, Springer, 2006

[11] HP Klug, L Alexander. X-ray Diffraction Procedures for Polycrystalline and Amorphous Materials, John Wiley & Sons, New York, 1974, pp. 618–708.

[12] N. Hanada, T. Ichikawa, S.-I. Orimo, H. Fujii, Correlation between hydrogen storage properties and structural characteristics in mechanically milled magnesium hydride MgH2.J. Alloys Compd. 366 (2004) 269-273.

[13] K-F. Aguey-Zinsou, T. Nicolaisen, J.R. Ares Fernandez, T. Klassen, R. Bormann. Effect of nanosized oxides on MgH2 (de)hydriding kinetics J Alloys Compd 434-435 (2007) 738-742

[14] A. Borgschulte, M. Bielmann, A. Zuttel, G. Barkhordarian, M. Dornheim, R. Bormann, Hydrogen dissociation on oxide covered MgH2 by catalytically active vacancies. Appl Surf Sci 254 (2008) 2377-2384.

[15] P. Selvam, B. Viswanathan, CS Swamy, V. Srinivasan, Magnesium and magnesium alloy hydrides Int. J. Hydrogen Energ. 11(3) (1986) 169-192.

[16] G. Barkhordarian, T. Klassen R. Bormann. Kinetic investigation of the effect of milling time on the hydrogen sorption reaction of magnesium catalyzed with different Nb2O5 contents. J. Alloys Compd 407 (2006) 249-255.

[17] R.A. Varin, T. Czujko, Z.S. Wronski, Nanomaterials for Solid State Hydrogen Storage. Springer Science+Business Media, New York. 2009.

[18] A. Borgschulte, R J Westerwaal, J H Rector, H Schreuders, B Dam, Griessen R. Catalytic activity of noble metals promoting hydrogen uptake. J Catal. 239 (2006) 263-271.

[19] H. Imamura, K. Yoshihara, M. Yoo, I. Kitazawa, Y. Sakata, S. Ooshima. Dehydriding of Sn/MgH2 nanocomposite formed by ball milling of MgH2 with Sn. Int J Hydrogen Energ 32 (2007) 4191-4194.

[20] V.D. Dobrovolsky, O.G. Ershova, Y.M. Solonin, O.Y. Khyzhuna, V. Paul-Boncour. Influence of TiB2 addition upon thermal stability and decomposition temperature of the MgH2 hydride of a Mg-based mechanical alloy. J Alloys Compd 465 (2008) 177-182.

[21] H.G. Schimmel, J. Huot, L.C. Chapon, F.D. Tichelaar, F.M. Mulder. Hydrogen Cycling of Niobium and Vanadium Catalyzed Nanostructured Magnesium. J Am Chem Soc 127 (2005) 14348-14354.

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

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," https://nanohub.org/resources/12853.

  BibTex | EndNote

1. hydrogen storage
2. materials science
3. nanophotonics