Catalytic activity of titania polymorphs towards desorption reaction of MgH2
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2016
Authors
Vujasin, Radojka
Mraković, Ana Đ.

Kurko, Sandra V.

Novaković, Nikola

Matović, Ljiljana

Grbović-Novaković, Jasmina

Milošević, Sanja S.

Article (Published version)

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Hydrogen desorption properties of MgH2 ball milled with two different TiO2 polymorphs, rutile and anatase, were studied. Structural characterization has been done by X-ray diffraction (XRD) analysis, particle size analysis (PSD) and scanning electron microscopy (SEM). The mechanism of desorption and the apparent activation energy for desorption were investigated by applying isoconversional kinetic analysis of DTA spectra, while desorbed species were followed by TPD coupled with mass spectroscopy. It has been demonstrate that the addition of rutile TiO2 significantly decrease the apparent activation energy for desorption (E-des(a)), while addition of anatase titania has negligible influence on E-des(a). Such behaviour could be explained in terms of the same crystal structure of rutile TiO2 and MgH2. Further, the mechanism of desorption changes from Avrami-Erofeev n = 3 for pure MgH2 to Avrami Erofeev n = 4 for composite materials. Copyright (c) 2016, Hydrogen Energy Publications, LLC. P...ublished by Elsevier Ltd. All rights reserved.
Keywords:
MgH2 / TiO2 polymorphs / Composites / Hydrogen storage / Catalytic propertiesSource:
International Journal of Hydrogen Energy, 2016, 41, 8, 4703-4711Publisher:
- Elsevier
Funding / projects:
DOI: 10.1016/j.ijhydene.2016.01.095
ISSN: 0360-3199; 1879-3487
WoS: 000372563000018
Scopus: 2-s2.0-84959463458
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VinčaTY - JOUR AU - Vujasin, Radojka AU - Mraković, Ana Đ. AU - Kurko, Sandra V. AU - Novaković, Nikola AU - Matović, Ljiljana AU - Grbović-Novaković, Jasmina AU - Milošević, Sanja S. PY - 2016 UR - https://vinar.vin.bg.ac.rs/handle/123456789/978 AB - Hydrogen desorption properties of MgH2 ball milled with two different TiO2 polymorphs, rutile and anatase, were studied. Structural characterization has been done by X-ray diffraction (XRD) analysis, particle size analysis (PSD) and scanning electron microscopy (SEM). The mechanism of desorption and the apparent activation energy for desorption were investigated by applying isoconversional kinetic analysis of DTA spectra, while desorbed species were followed by TPD coupled with mass spectroscopy. It has been demonstrate that the addition of rutile TiO2 significantly decrease the apparent activation energy for desorption (E-des(a)), while addition of anatase titania has negligible influence on E-des(a). Such behaviour could be explained in terms of the same crystal structure of rutile TiO2 and MgH2. Further, the mechanism of desorption changes from Avrami-Erofeev n = 3 for pure MgH2 to Avrami Erofeev n = 4 for composite materials. Copyright (c) 2016, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. PB - Elsevier T2 - International Journal of Hydrogen Energy T1 - Catalytic activity of titania polymorphs towards desorption reaction of MgH2 VL - 41 IS - 8 SP - 4703 EP - 4711 DO - 10.1016/j.ijhydene.2016.01.095 ER -
@article{ author = "Vujasin, Radojka and Mraković, Ana Đ. and Kurko, Sandra V. and Novaković, Nikola and Matović, Ljiljana and Grbović-Novaković, Jasmina and Milošević, Sanja S.", year = "2016", abstract = "Hydrogen desorption properties of MgH2 ball milled with two different TiO2 polymorphs, rutile and anatase, were studied. Structural characterization has been done by X-ray diffraction (XRD) analysis, particle size analysis (PSD) and scanning electron microscopy (SEM). The mechanism of desorption and the apparent activation energy for desorption were investigated by applying isoconversional kinetic analysis of DTA spectra, while desorbed species were followed by TPD coupled with mass spectroscopy. It has been demonstrate that the addition of rutile TiO2 significantly decrease the apparent activation energy for desorption (E-des(a)), while addition of anatase titania has negligible influence on E-des(a). Such behaviour could be explained in terms of the same crystal structure of rutile TiO2 and MgH2. Further, the mechanism of desorption changes from Avrami-Erofeev n = 3 for pure MgH2 to Avrami Erofeev n = 4 for composite materials. Copyright (c) 2016, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.", publisher = "Elsevier", journal = "International Journal of Hydrogen Energy", title = "Catalytic activity of titania polymorphs towards desorption reaction of MgH2", volume = "41", number = "8", pages = "4703-4711", doi = "10.1016/j.ijhydene.2016.01.095" }
Vujasin, R., Mraković, A. Đ., Kurko, S. V., Novaković, N., Matović, L., Grbović-Novaković, J.,& Milošević, S. S.. (2016). Catalytic activity of titania polymorphs towards desorption reaction of MgH2. in International Journal of Hydrogen Energy Elsevier., 41(8), 4703-4711. https://doi.org/10.1016/j.ijhydene.2016.01.095
Vujasin R, Mraković AĐ, Kurko SV, Novaković N, Matović L, Grbović-Novaković J, Milošević SS. Catalytic activity of titania polymorphs towards desorption reaction of MgH2. in International Journal of Hydrogen Energy. 2016;41(8):4703-4711. doi:10.1016/j.ijhydene.2016.01.095 .
Vujasin, Radojka, Mraković, Ana Đ., Kurko, Sandra V., Novaković, Nikola, Matović, Ljiljana, Grbović-Novaković, Jasmina, Milošević, Sanja S., "Catalytic activity of titania polymorphs towards desorption reaction of MgH2" in International Journal of Hydrogen Energy, 41, no. 8 (2016):4703-4711, https://doi.org/10.1016/j.ijhydene.2016.01.095 . .