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Modification of cobalt oxide electrochemically deposited on stainless steel meshes with co-mn thin films prepared by magnetron sputtering: Effect of preparation method and application to ethanol oxidation.
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SYSNO ASEP 0549564 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Modification of cobalt oxide electrochemically deposited on stainless steel meshes with co-mn thin films prepared by magnetron sputtering: Effect of preparation method and application to ethanol oxidation. Author(s) Jirátová, Květa (UCHP-M) RID, ORCID, SAI
Perekrestov, Roman (FZU-D)
Dvořáková, M. (CZ)
Balabánová, Jana (UCHP-M) RID, ORCID, SAI
Koštejn, Martin (UCHP-M) RID, SAI, ORCID
Veselý, M. (CZ)
Čada, Martin (FZU-D) RID, ORCID, SAI
Topka, Pavel (UCHP-M) RID, ORCID, SAI
Pokorná, Dana (UCHP-M) RID, SAI
Hubička, Zdeněk (FZU-D) RID, ORCID, SAI
Kovanda, F. (CZ)Article number 1453 Source Title Catalysts. - : MDPI
Roč. 11, č. 12 (2021)Number of pages 24 s. Language eng - English Country CH - Switzerland Keywords cobalt–manganese oxides ; magnetron sputtering ; stainless steel meshes ; thin film Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry Subject RIV - cooperation Institute of Physics - Plasma and Gas Discharge Physics R&D Projects GA21-04477S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UCHP-M - RVO:67985858 ; FZU-D - RVO:68378271 UT WOS 000735620400001 EID SCOPUS 85120033965 DOI 10.3390/catal11121453 Annotation Magnetron sputtering is an advantageous method for preparing catalysts supported on stainless steel meshes. Such catalysts are particularly suitable for processes carried out at high space velocities. One of these is the catalytic total oxidation of volatile organic compounds (VOC), eco-nomically feasible and environmentally friendly method of VOC abatement. The reactive radio frequency (RF) magnetron sputtering of Mn and Co + Mn mixtures in an oxidation Ar + O2 atmosphere was applied to form additional thin oxide coatings on cobalt oxide layers prepared by electrochemical deposition and heating on stainless steel meshes. Time of the RF magnetron sputtering was changed to obtain MnOx and CoMnOx coatings of various thickness (0.1–0.3 µm). The properties of the supported CoOx–MnOx and CoOx–CoMnOx catalysts were characterized by scanning electron microscopy (SEM), powder X-ray diffraction (XRD), temperature programmed reduction (H2-TPR), Fourier-transform infrared (FTIR) and Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). The catalytic activity was investigated in the deep oxidation of ethanol, which was employed as a model VOC. According to the specific activities (amount of ethanol converted per unit mass of metal oxides per hour), the performance of CoOx–MnOx catalysts was higher than that of CoOx– CoMnOx ones. The catalysts with the smallest layer thickness (0.1 µm) showed the highest catalytic activity. Compared to the commercial pelletized Co–Mn–Al mixed oxide catalyst, the sputtered catalysts exhibited considerably higher (23–87 times) catalytic activity despite the more than 360–570 times lower content of the Co and Mn active components in the catalytic bed. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2022 Electronic address https://www.mdpi.com/2073-4344/11/12/1453
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