Publications by authors named "Maria Argirusi"

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Rhenium oxide nanoparticles - Sonochemical synthesis and integration on anode powders for solid oxide fuel cells.

Ultrason Sonochem 2020 Dec 8;69:105250. Epub 2020 Jul 8.

National Technical University of Athens, School of Chemical Engineering, Laboratory of Inorganic Materials Technology, I. Polytechniou 9, 15773 Zografou, Athens, Greece; Technische Universität Clausthal, Clausthal Research Center for Materials Technology (CZM), Leibnizstr. 9, 38678 Clausthal-Zellerfeld, Germany. Electronic address:

Rhenium oxide nanoparticles have been prepared using ultrasonication at 20 kHz. Samples characterization was committed via SEM-EDX, TEM, XRD, and Raman spectroscopy. Various experimental parameters were examined, including precursor/substrate amounts, ultrasonication intensity, and type of solvent used. Insights to the agglomeration of the prepared nanoparticles depending on the preparation parameters are given. As ultrasonic source we used either an ultrasonic probe by Sonics & Materials Inc. (20 kHz, 750 W net output) or a Bandelin SONOPULS HD 3200 ultrasound generator (20 kHz, 200 W net output) at intensities between 30 and 100 W/cm. The rhenium oxide nanoparticles haven been decorated on state-of-the-art anode materials (NiO/GDC) for solid oxide fuel cells (SOFCs) in order to prepare catalytically more active anode powders. These experiments revealed that ultrasonication intensity and solvents used are able to affect final nanoparticles size distribution and morphology. At the same time, ratio of precursor and substrate compounds amounts as well as ultrasonication intensity and duration were all found to affect the decoration loading extend of nanoformations on substrate powders. The results showing the influence of the above-mentioned parameters allowed for the quantification of the effects on the loading and the preferable sites of the decoration.
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December 2020