Cobalt Oxide Catalysts in the Form of Thin Films Prepared by Magnetron Sputtering on Stainless-Steel Meshes: Performance in Ethanol Oxidation

Catalytic total oxidation is an effective procedure to minimize emissions of volatile organic compounds (VOC) emissions in industrial gases. Catalysts in the form of meshes are remarkable as they minimize the internal diffusion of reactants during the reaction as well as the need of expensive active...

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Bibliographic Details
Published in:Catalysts 2019-10, Vol.9 (10), p.806
Main Authors: Jirátová, Květa, Perekrestov, Roman, Dvořáková, Michaela, Balabánová, Jana, Topka, Pavel, Koštejn, Martin, Olejníček, Jiří, Čada, Martin, Hubička, Zdeněk, Kovanda, František
Format: Article
Language:English
Subjects:
Aluminum
Aqueous solutions
Catalysts
Catalytic activity
Chemical reactions
Cobalt
Cobalt oxides
Enlargement
Ethanol
Magnetron sputtering
Morphology
Nitrates
Oxidation
Raman spectroscopy
Roasting
Silicon wafers
Stainless steels
Thin films
VOCs
Volatile organic compounds
Wire
X ray photoelectron spectroscopy
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Summary:Catalytic total oxidation is an effective procedure to minimize emissions of volatile organic compounds (VOC) emissions in industrial gases. Catalysts in the form of meshes are remarkable as they minimize the internal diffusion of reactants during the reaction as well as the need of expensive active components. In this paper, various conditions of radio frequency magnetron sputtering of cobalt on stainless-steel meshes was applied during catalyst preparation. Properties of the supported Co3O4 catalysts were characterized by SEM, XRD, temperature programmed reduction (H2-TPR), FTIR, XPS, and Raman spectroscopy. Catalytic activity was examined in deep oxidation of ethanol chosen as a model VOC. Performance of the catalysts depended on the amount of Co3O4 deposited on the supporting meshes. According to specific activities (the amounts of ethanol converted per unit weight of Co3O4), smaller Co3O4 particle size led to increased catalytic activity. The catalyst prepared by sputtering in an Ar+O2 atmosphere without calcination showed the highest catalytic activity, which decreased after calcination due to enlargement of Co3O4 particles. However, specific activity of this catalyst was more than 20 times higher than that of pelletized commercial Co3O4 catalyst used for comparison.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal9100806