Synthesis of TiH2 nanopowder via the Guen-Miller Flow-Levitation method and characterization
| Autor: | E. S. Afanasenkova, G. A. Vorobjeva, B. V. Kudrov, Alexander V. Naumkin, I. O. Leipunsky, N. G. Berezkina, M. L. Kuskov, G.W. Lopez, A. N. Zhigach |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Hydrogen Mechanical Engineering Metals and Alloys chemistry.chemical_element Titanium hydride 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Hydrogen storage chemistry Chemical engineering X-ray photoelectron spectroscopy Mechanics of Materials Transmission electron microscopy Materials Chemistry Levitation Particle 0210 nano-technology Stoichiometry |
| Zdroj: | Journal of Alloys and Compounds. 778:271-279 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2018.11.088 |
| Popis: | Stoichiometric TiH2 nano-crystalline powder with particle mean size of less than 30 nm was synthesized for the first time via the Guen-Miller Flow-Levitation method. Details of the method are explained, and characterization of the synthesized TiH2 nanopowder is performed using high-resolution transmission electron microscopy, electron and X-ray diffraction analyses and X-ray photoelectron spectroscopy. Particle structure analysis confirms the capability and versatility of the Guen-Miller method to synthesize high-grade nano-scaled stoichiometric titanium hydride powder. Hydrogen recovery analyses are conducted and compared to hydrogen recovery from commercial-grade titanium hydride powder. Thermal and mass-spectrometry analyses on the synthesized nanopowder shows that hydrogen recovery starts at 390 °C and peaks at 460 °C, which lowers the energy demand during the process. These temperatures and the energy demand are substantially lower than the required in hydrogen recovery from conventional micro-sized commercial-grade titanium hydride. The results confirm that stoichiometric nano-scaled titanium hydride powder synthesized via the Guen-Miller Flow Levitation method possesses desirable characteristics for hydrogen storage and recovery. |
| Databáze: | OpenAIRE |
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