OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

Spark plasma sintering synthesis of Ni1−xZnxFe2O4 ferrites: Mössbauer and catalytic study

Velinov, Nikolay and Manova, Elina and Tsoncheva, Tanya and Estournès, Claude and Paneva, Daniela and Tenchev, Krassimir and Petkova, Vilma and Koleva, Kremena and Kunev, Boris and Mitov, Ivan Spark plasma sintering synthesis of Ni1−xZnxFe2O4 ferrites: Mössbauer and catalytic study. (2012) Solid State Sciences, 14 (8). 1092-1099. ISSN 1293-2558

[img]
Preview
(Document in English)

PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
941kB

Official URL: http://dx.doi.org/10.1016/j.solidstatesciences.2012.05.023

Abstract

Nickel-zinc ferrite nanoparticles, Ni1-xZnxFe2O4 (x ¼ 0, 0.2, 0.5, 0.8, 1.0) were prepared by combination of chemical precipitation and spark plasma sintering (SPS) techniques and conventional thermal treatment of the obtained precursors. The phase composition and structural properties of the obtained materials were investigated by X-ray diffraction and Mössbauer spectroscopy and their catalytic activity in methanol decomposition was tested. A strong effect of reaction medium leading to the transformation of ferrites to a complex mixture of different iron containing phases was detected. A tendency of formation of Fe-carbide was found for the samples synthesized by SPS, while predominantly iron-nickel alloys ware registered in TS obtained samples. The catalytic activity and selectivity in methanol decomposition to CO and methane depended on the current phase composition of the obtained ferrites, which was formed by the influence of the reaction medium.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com/science/article/pii/S1293255812001860
HAL Id:hal-00838208
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Bulgarian Academy of Sciences (BULGARIA)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Laboratory name:
Statistics:download
Deposited By: cirimat webmestre
Deposited On:25 Jun 2013 07:06

Repository Staff Only: item control page