The Study of Thermal Stability of Mn-Zr-Ce, Mn-Ce and Mn-Zr Oxide Catalysts for CO Oxidation
MnOx-CeO2, MnOx-ZrO2, MnOx-ZrO2-CeO2 oxides with the Mn/(Zr + Ce + Mn) molar ratio of 0.3 were synthesized by coprecipitation method followed by calcination in the temperature range of 400–800 °C and characterized by XRD, N2 adsorption, TPR, TEM, and EPR. The catalytic activity was tested in the CO...
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| creator | Afonasenko, T. N. Glyzdova, D. V. Yurpalov, V. L. Konovalova, V. P. Rogov, V. A. Gerasimov, E. Yu Bulavchenko, O. A. |
| description | MnOx-CeO2, MnOx-ZrO2, MnOx-ZrO2-CeO2 oxides with the Mn/(Zr + Ce + Mn) molar ratio of 0.3 were synthesized by coprecipitation method followed by calcination in the temperature range of 400–800 °C and characterized by XRD, N2 adsorption, TPR, TEM, and EPR. The catalytic activity was tested in the CO oxidation reaction. It was found that MnOx-CeO2, MnOx-ZrO2-CeO2, MnOx-ZrO2 catalysts, calcined at 400–500 °C, 650–700 °C and 500–650 °C, respectively, show the highest catalytic activity in the reaction of CO oxidation. According to XRD and TEM results, thermal stability of catalysts is determined by the temperature of decomposition of the solid solution Mnx(Ce,Zr)1−xO2. The TPR-H2 and EPR methods showed that the high activity in CO oxidation correlates with the content of easily reduced fine MnOx particles in the samples and the presence of paramagnetic defects in the form of oxygen vacancies. The maximum activity for each series of catalysts is associated with the start of solid solution decomposition. Formation of active phase shifts to the high-temperature region with the addition of zirconium to the MnOx-CeO2 catalyst. |
| doi_str_mv | 10.3390/ma15217553 |
| format | Article |
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N. ; Glyzdova, D. V. ; Yurpalov, V. L. ; Konovalova, V. P. ; Rogov, V. A. ; Gerasimov, E. Yu ; Bulavchenko, O. A.</creator><creatorcontrib>Afonasenko, T. N. ; Glyzdova, D. V. ; Yurpalov, V. L. ; Konovalova, V. P. ; Rogov, V. A. ; Gerasimov, E. Yu ; Bulavchenko, O. A.</creatorcontrib><description>MnOx-CeO2, MnOx-ZrO2, MnOx-ZrO2-CeO2 oxides with the Mn/(Zr + Ce + Mn) molar ratio of 0.3 were synthesized by coprecipitation method followed by calcination in the temperature range of 400–800 °C and characterized by XRD, N2 adsorption, TPR, TEM, and EPR. The catalytic activity was tested in the CO oxidation reaction. It was found that MnOx-CeO2, MnOx-ZrO2-CeO2, MnOx-ZrO2 catalysts, calcined at 400–500 °C, 650–700 °C and 500–650 °C, respectively, show the highest catalytic activity in the reaction of CO oxidation. According to XRD and TEM results, thermal stability of catalysts is determined by the temperature of decomposition of the solid solution Mnx(Ce,Zr)1−xO2. The TPR-H2 and EPR methods showed that the high activity in CO oxidation correlates with the content of easily reduced fine MnOx particles in the samples and the presence of paramagnetic defects in the form of oxygen vacancies. The maximum activity for each series of catalysts is associated with the start of solid solution decomposition. Formation of active phase shifts to the high-temperature region with the addition of zirconium to the MnOx-CeO2 catalyst.</description><identifier>ISSN: 1996-1944</identifier><identifier>EISSN: 1996-1944</identifier><identifier>DOI: 10.3390/ma15217553</identifier><identifier>PMID: 36363144</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Carbon monoxide ; Catalysts ; Catalytic activity ; Cerium oxides ; Decomposition ; High temperature ; Oxidation ; Oxidation-reduction reaction ; Oxides ; Roasting ; Solid solutions ; Spectrum analysis ; Thermal stability ; VOCs ; Volatile organic compounds ; Zirconium ; Zirconium dioxide</subject><ispartof>Materials, 2022-10, Vol.15 (21), p.7553</ispartof><rights>COPYRIGHT 2022 MDPI AG</rights><rights>2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). 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N.</creatorcontrib><creatorcontrib>Glyzdova, D. V.</creatorcontrib><creatorcontrib>Yurpalov, V. L.</creatorcontrib><creatorcontrib>Konovalova, V. P.</creatorcontrib><creatorcontrib>Rogov, V. A.</creatorcontrib><creatorcontrib>Gerasimov, E. Yu</creatorcontrib><creatorcontrib>Bulavchenko, O. A.</creatorcontrib><title>The Study of Thermal Stability of Mn-Zr-Ce, Mn-Ce and Mn-Zr Oxide Catalysts for CO Oxidation</title><title>Materials</title><description>MnOx-CeO2, MnOx-ZrO2, MnOx-ZrO2-CeO2 oxides with the Mn/(Zr + Ce + Mn) molar ratio of 0.3 were synthesized by coprecipitation method followed by calcination in the temperature range of 400–800 °C and characterized by XRD, N2 adsorption, TPR, TEM, and EPR. The catalytic activity was tested in the CO oxidation reaction. It was found that MnOx-CeO2, MnOx-ZrO2-CeO2, MnOx-ZrO2 catalysts, calcined at 400–500 °C, 650–700 °C and 500–650 °C, respectively, show the highest catalytic activity in the reaction of CO oxidation. According to XRD and TEM results, thermal stability of catalysts is determined by the temperature of decomposition of the solid solution Mnx(Ce,Zr)1−xO2. The TPR-H2 and EPR methods showed that the high activity in CO oxidation correlates with the content of easily reduced fine MnOx particles in the samples and the presence of paramagnetic defects in the form of oxygen vacancies. The maximum activity for each series of catalysts is associated with the start of solid solution decomposition. Formation of active phase shifts to the high-temperature region with the addition of zirconium to the MnOx-CeO2 catalyst.</description><subject>Carbon monoxide</subject><subject>Catalysts</subject><subject>Catalytic activity</subject><subject>Cerium oxides</subject><subject>Decomposition</subject><subject>High temperature</subject><subject>Oxidation</subject><subject>Oxidation-reduction reaction</subject><subject>Oxides</subject><subject>Roasting</subject><subject>Solid solutions</subject><subject>Spectrum analysis</subject><subject>Thermal stability</subject><subject>VOCs</subject><subject>Volatile organic compounds</subject><subject>Zirconium</subject><subject>Zirconium dioxide</subject><issn>1996-1944</issn><issn>1996-1944</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpdUV1LHTEQDWKpYn3pL1joSxHXZvKdF0EW-wGW-1D7Ugohd5PVyG5ik13p_ffN9Yq1zTxk5uTMmRMGobeAzyjV-MNkgROQnNM9dAhaixY0Y_sv8gN0XModrodSUES_RgdU1ADGDtHP61vffJsXt2nS0NQiT3asgF2HMcyP4NfY_sht50-3WecbG90Oa1a_g_NNZ2c7bspcmiHlpls9wnYOKb5BrwY7Fn_8dB-h7x8vr7vP7dXq05fu4qrtKSdzW_33SsCaKUwoHzQDKx0XQhPHSS-FVkoqDI5IriUnGrx24DgwQpQFL-kROt_p3i_rybvexznb0dznMNm8MckG8-9LDLfmJj0YLTjDAleB908COf1afJnNFErvx9FGn5ZiiKRcSajuKvXdf9S7tORYv7dlMaG4wrqyznasGzt6E-KQ6ty-hvNT6FP0Q6j4hWRcMsB6K3uya-hzKiX74dk9YLNdtPm7aPoHFEaUpA</recordid><startdate>20221027</startdate><enddate>20221027</enddate><creator>Afonasenko, T. 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N.</au><au>Glyzdova, D. V.</au><au>Yurpalov, V. L.</au><au>Konovalova, V. P.</au><au>Rogov, V. A.</au><au>Gerasimov, E. Yu</au><au>Bulavchenko, O. A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Study of Thermal Stability of Mn-Zr-Ce, Mn-Ce and Mn-Zr Oxide Catalysts for CO Oxidation</atitle><jtitle>Materials</jtitle><date>2022-10-27</date><risdate>2022</risdate><volume>15</volume><issue>21</issue><spage>7553</spage><pages>7553-</pages><issn>1996-1944</issn><eissn>1996-1944</eissn><abstract>MnOx-CeO2, MnOx-ZrO2, MnOx-ZrO2-CeO2 oxides with the Mn/(Zr + Ce + Mn) molar ratio of 0.3 were synthesized by coprecipitation method followed by calcination in the temperature range of 400–800 °C and characterized by XRD, N2 adsorption, TPR, TEM, and EPR. The catalytic activity was tested in the CO oxidation reaction. It was found that MnOx-CeO2, MnOx-ZrO2-CeO2, MnOx-ZrO2 catalysts, calcined at 400–500 °C, 650–700 °C and 500–650 °C, respectively, show the highest catalytic activity in the reaction of CO oxidation. According to XRD and TEM results, thermal stability of catalysts is determined by the temperature of decomposition of the solid solution Mnx(Ce,Zr)1−xO2. The TPR-H2 and EPR methods showed that the high activity in CO oxidation correlates with the content of easily reduced fine MnOx particles in the samples and the presence of paramagnetic defects in the form of oxygen vacancies. The maximum activity for each series of catalysts is associated with the start of solid solution decomposition. Formation of active phase shifts to the high-temperature region with the addition of zirconium to the MnOx-CeO2 catalyst.</abstract><cop>Basel</cop><pub>MDPI AG</pub><pmid>36363144</pmid><doi>10.3390/ma15217553</doi><orcidid>https://orcid.org/0000-0002-7228-2807</orcidid><orcidid>https://orcid.org/0000-0002-7243-5498</orcidid><orcidid>https://orcid.org/0000-0001-5944-2629</orcidid><orcidid>https://orcid.org/0000-0002-3230-3335</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Carbon monoxide Catalysts Catalytic activity Cerium oxides Decomposition High temperature Oxidation Oxidation-reduction reaction Oxides Roasting Solid solutions Spectrum analysis Thermal stability VOCs Volatile organic compounds Zirconium Zirconium dioxide |
| title | The Study of Thermal Stability of Mn-Zr-Ce, Mn-Ce and Mn-Zr Oxide Catalysts for CO Oxidation |
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