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Co-Mn mixed oxides prepared by magnetron sputtering on stainless steel meshes as catalysts for the oxidation of volatile organic compounds.
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SYSNO ASEP 0547114 Document Type A - Abstract R&D Document Type The record was not marked in the RIV R&D Document Type Není vybrán druh dokumentu Title Co-Mn mixed oxides prepared by magnetron sputtering on stainless steel meshes as catalysts for the oxidation of volatile organic compounds. Author(s) Topka, Pavel (UCHP-M) RID, ORCID, SAI
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
Pokorná, Dana (UCHP-M) RID, SAI
Čada, Martin (FZU-D) RID, ORCID, SAI
Hubička, Zdeněk (FZU-D) RID, ORCID, SAI
Kovanda, F. (CZ)Source Title Onsite Conference olonne A + B. - - : Science, Engineering, Technology Conferences Organisers, 2021 - ISBN N Number of pages 2 s. Publication form Online - E Action Edition Smart Materials and Surfaces /6./ Event date 20.10.2021 - 22.10.2021 VEvent location Milan Country IT - Italy Event type EUR Language eng - English Country IT - Italy Keywords cobalt–manganese mixed oxides ; magnetron sputtering ; stainless steel meshes Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry Subject RIV - cooperation Institute of Physics - Plasma and Gas Discharge Physics R&D Projects TN01000048 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) Institutional support UCHP-M - RVO:67985858 ; FZU-D - RVO:68378271 Annotation Catalysts in the form of meshes possess a lot of advantages, especially low pressure drop and good heat transfer. Deposition of thin film of active phase on stainless steel meshes enables its high utilization in catalytic reaction due to low influence of internal diffusion of reactants and products. Oxides of Co and Mn show high catalytic activityh in various oxidation reactions. We have shown recently that the combination of magnetron sputtering and electrochemical deposition is a powerful tool to prepare highly active and stable catalyst for the oxidation of volatile organic compounds [1]. In the present study, we prepared Co-Mn mixed oxides supported on stainless steel meshes by magnetron sputtering of Mn or Co+Mn in the oxidation atmosphere, followed by calcination at 500 °C in air. The meshes were first pretreated by RF magnetron sputtering of Co to activate the metal surface. After that, a layer of Co3O4 (0.3 µm thick) was deposited electrochemically. The second layer was deposited by sputtering of Mn or Co+Mn in Ar+O2 to prepare either MnOx or mixed CoMnOx layers. Time of magnetron sputtering duration was changed to obtain different thicknesses of the MnOx or CoMnOx layers (0.1, 0.2 or 0.3 µm). In addition, pure MnOx and Co3O4 layers (thickness 2 µm) were prepared on meshes for comparison. In the total oxidation of ethanol, the activities of all sputtered catalysts were higher than that of the commercial pelletized Co-Mn-Al catalyst, although the content of the active components in the catalytic bed was more than 50 times lower. The highest catalytic activity exhibited the catalyst prepared by sputtering of MnOx layer over electrochemically deposited Co3O4. The pure MnOx catalyst supported on meshes showed the lowest temperature of 50 % ethanol conversion. However, two times higher amount of CO was formed over this catalyst in comparison with corresponding CoMnOx catalysts. Over the catalysts supported on meshes, the temperature required for 95 % conversion of ethanol to CO2 was by ~100 °C lower in comparison with commercial Co-Mn-Al pellets. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2022
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