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

0509504 - ÚCHP 2020 RIV CH eng J - Journal Article
Jirátová, Květa - Perekrestov, Roman - Dvořáková, M. - Balabánová, Jana - Topka, Pavel - Koštejn, Martin - Olejníček, Jiří - Čada, Martin - Hubička, Zdeněk - Kovanda, F.
Cobalt Oxide Catalysts in the Form of Thin Films Prepared by Magnetron Sputtering on Stainless-Steel Meshes: Performance in Ethanol Oxidation.
Catalysts. Roč. 9, č. 10 (2019), č. článku 806. E-ISSN 2073-4344
R&D Projects: GA MŠMT(CZ) LO1409; GA ČR GA17-08389S
Institutional support: RVO:67985858 ; RVO:68378271
Keywords : coating * thin film * cobalt oxides
OECD category: Chemical process engineering; Fluids and plasma physics (including surface physics) (FZU-D)
Impact factor: 3.520, year: 2019
Method of publishing: Open access
https://www.mdpi.com/2073-4344/9/10/806

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 diffuusion 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.
Permanent Link: http://hdl.handle.net/11104/0303682