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Microstructural Investigation of Nanocrystalline Hydrogen-Storing Mg-Titanate Nanotube Composites Processed by High-Pressure Torsion

Author

Listed:
  • Marcell Gajdics

    (Department of Materials Physics, Eötvös University, P.O.B. 32, H-1518 Budapest, Hungary)

  • Tony Spassov

    (Department of Chemistry, University of Sofia “St.Kl.Ohridski”, 1164 Sofia, Bulgaria)

  • Viktória Kovács Kis

    (Center of Energy Research, Hungarian Academy of Sciences, H-1121 Budapest, Hungary
    Institute of Environmental Sciences, University of Pannonia, Egyetem u. 10., 8200 Veszprem, Hungary)

  • Ferenc Béke

    (Department of Organic Chemistry, Eötvös University, P.O.B. 32, H-1518 Budapest, Hungary)

  • Zoltán Novák

    (Department of Organic Chemistry, Eötvös University, P.O.B. 32, H-1518 Budapest, Hungary)

  • Erhard Schafler

    (Faculty of Physics, University of Vienna, A-1090 Vienna, Austria)

  • Ádám Révész

    (Department of Materials Physics, Eötvös University, P.O.B. 32, H-1518 Budapest, Hungary)

Abstract

A high-energy ball milling and subsequent high-pressure torsion method was applied to synthesize nanocrystalline magnesium samples catalyzed by TiO 2 or titanate nanotubes. The microstructure of the as-milled powders and the torqued bulk disks was characterized by X-ray diffraction. The recorded diffractograms have been evaluated by the convolutional multiple whole profile fitting algorithm, which provided microstructural parameters (average crystal size, crystallite size distribution, average dislocation density). The morphology of the nanotube-containing disks has been examined by high-resolution transmission electron microscopy. The effect of the different additives and preparation conditions on the hydrogen absorption behavior was investigated in a Sieverts’-type apparatus. It was found that the ball-milling route has a prominent effect on the dispersion and morphology of the titanate nanotubes, and the absorption capability of the Mg-based composite is highly dependent on these features.

Suggested Citation

  • Marcell Gajdics & Tony Spassov & Viktória Kovács Kis & Ferenc Béke & Zoltán Novák & Erhard Schafler & Ádám Révész, 2020. "Microstructural Investigation of Nanocrystalline Hydrogen-Storing Mg-Titanate Nanotube Composites Processed by High-Pressure Torsion," Energies, MDPI, vol. 13(3), pages 1-14, January.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:3:p:563-:d:312614
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    References listed on IDEAS

    as
    1. Louis Schlapbach & Andreas Züttel, 2001. "Hydrogen-storage materials for mobile applications," Nature, Nature, vol. 414(6861), pages 353-358, November.
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    Cited by:

    1. Ádám Révész & Marcell Gajdics, 2021. "Improved H-Storage Performance of Novel Mg-Based Nanocomposites Prepared by High-Energy Ball Milling: A Review," Energies, MDPI, vol. 14(19), pages 1-31, October.
    2. Ádám Révész, 2023. "Improved Hydrogen Storage Performance of Novel Metal Hydrides and Their Composites," Energies, MDPI, vol. 16(8), pages 1-3, April.
    3. Sara Stelitano & Giuseppe Conte & Alfonso Policicchio & Alfredo Aloise & Giovanni Desiderio & Raffaele G. Agostino, 2020. "Pinecone-Derived Activated Carbons as an Effective Medium for Hydrogen Storage," Energies, MDPI, vol. 13(9), pages 1-16, May.
    4. Ádám Révész & Marcell Gajdics & Miratul Alifah & Viktória Kovács Kis & Erhard Schafler & Lajos Károly Varga & Stanislava Todorova & Tony Spassov & Marcello Baricco, 2022. "Thermal, Microstructural and Electrochemical Hydriding Performance of a Mg 65 Ni 20 Cu 5 Y 10 Metallic Glass Catalyzed by CNT and Processed by High-Pressure Torsion," Energies, MDPI, vol. 15(15), pages 1-15, August.
    5. Ádám Révész & Roman Paramonov & Tony Spassov & Marcell Gajdics, 2023. "Microstructure and Hydrogen Storage Performance of Ball-Milled MgH 2 Catalyzed by FeTi," Energies, MDPI, vol. 16(3), pages 1-14, January.
    6. Ádám Révész & Marcell Gajdics, 2021. "High-Pressure Torsion of Non-Equilibrium Hydrogen Storage Materials: A Review," Energies, MDPI, vol. 14(4), pages 1-22, February.

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