CeO2:Mn3O4 Catalytic Micro-Converters Tuned for CH4 Detection Based on Catalytic Combustion under Real Operating Conditions
Mesoporous CeO2:Mn3O4 materials (3:7 and 7:3 molar ratio) were prepared by co-precipitation and deposited as porous thick films over alumina (Al2O3) planar substrate provided with Pt meander. The aim was oriented towards detecting low levels methane (CH4) at moderate operating temperatures. Herein w...
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| Veröffentlicht in: | Materials 2020-05, Vol.13 (9), p.2196 |
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| creator | Simion, Cristian E. Florea, Ovidiu G. Florea, Mihaela Neaţu, Florentina Neaţu, Ştefan Trandafir, Mihaela M. Stănoiu, Adelina |
| description | Mesoporous CeO2:Mn3O4 materials (3:7 and 7:3 molar ratio) were prepared by co-precipitation and deposited as porous thick films over alumina (Al2O3) planar substrate provided with Pt meander. The aim was oriented towards detecting low levels methane (CH4) at moderate operating temperatures. Herein we demonstrated that the sensitivity of catalytic micro-converters (CMCs) towards a given peak of CH4 concentration corresponds to specific gas-surface interaction phenomena. More precisely, a transition from thermal conductivity to combustion rate is likely to occur when CMCs are operated under real atmospheric conditions (normal pressure, presence of relative humidity, and constant operating temperature). The response to CH4 was analyzed over different gas flows and different gas concentrations under the same operating regime. The materials were fully characterized by adsorption-desorption isotherms, H2-Temperature Programmed Reduction (H2-TPR), X-ray Diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Scanning Electron Microscopy (SEM), and Raman spectroscopies. Thus, the applicative aspect of using CeO2:Mn3O4 as moderate temperature CMC for CH4 detection is brought to the fore. |
| doi_str_mv | 10.3390/ma13092196 |
| format | Article |
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The aim was oriented towards detecting low levels methane (CH4) at moderate operating temperatures. Herein we demonstrated that the sensitivity of catalytic micro-converters (CMCs) towards a given peak of CH4 concentration corresponds to specific gas-surface interaction phenomena. More precisely, a transition from thermal conductivity to combustion rate is likely to occur when CMCs are operated under real atmospheric conditions (normal pressure, presence of relative humidity, and constant operating temperature). The response to CH4 was analyzed over different gas flows and different gas concentrations under the same operating regime. The materials were fully characterized by adsorption-desorption isotherms, H2-Temperature Programmed Reduction (H2-TPR), X-ray Diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Scanning Electron Microscopy (SEM), and Raman spectroscopies. Thus, the applicative aspect of using CeO2:Mn3O4 as moderate temperature CMC for CH4 detection is brought to the fore.</description><identifier>ISSN: 1996-1944</identifier><identifier>EISSN: 1996-1944</identifier><identifier>DOI: 10.3390/ma13092196</identifier><identifier>PMID: 32403264</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Aluminum oxide ; Calibration ; Catalytic converters ; Cerium oxides ; Combustion ; Gas flow ; Gas-surface interactions ; Manganese oxides ; Metal oxides ; Methane ; Morphology ; Operating temperature ; Photoelectrons ; Poisoning ; Porous materials ; Ratios ; Relative humidity ; Sensors ; Solid solutions ; Substrates ; Thermal conductivity ; Thick films ; Transistors ; X ray photoelectron spectroscopy</subject><ispartof>Materials, 2020-05, Vol.13 (9), p.2196</ispartof><rights>2020. This work is licensed under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>2020 by the authors. 2020</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c383t-ccded9f1d74226723bd55c79325ec0867df0253dff429ba6c8ebddaca76919b53</citedby><cites>FETCH-LOGICAL-c383t-ccded9f1d74226723bd55c79325ec0867df0253dff429ba6c8ebddaca76919b53</cites><orcidid>0000-0002-6612-6090 ; 0000-0002-0098-0542</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC7254370/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC7254370/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,727,780,784,885,27923,27924,53790,53792</link.rule.ids></links><search><creatorcontrib>Simion, Cristian E.</creatorcontrib><creatorcontrib>Florea, Ovidiu G.</creatorcontrib><creatorcontrib>Florea, Mihaela</creatorcontrib><creatorcontrib>Neaţu, Florentina</creatorcontrib><creatorcontrib>Neaţu, Ştefan</creatorcontrib><creatorcontrib>Trandafir, Mihaela M.</creatorcontrib><creatorcontrib>Stănoiu, Adelina</creatorcontrib><title>CeO2:Mn3O4 Catalytic Micro-Converters Tuned for CH4 Detection Based on Catalytic Combustion under Real Operating Conditions</title><title>Materials</title><description>Mesoporous CeO2:Mn3O4 materials (3:7 and 7:3 molar ratio) were prepared by co-precipitation and deposited as porous thick films over alumina (Al2O3) planar substrate provided with Pt meander. The aim was oriented towards detecting low levels methane (CH4) at moderate operating temperatures. Herein we demonstrated that the sensitivity of catalytic micro-converters (CMCs) towards a given peak of CH4 concentration corresponds to specific gas-surface interaction phenomena. More precisely, a transition from thermal conductivity to combustion rate is likely to occur when CMCs are operated under real atmospheric conditions (normal pressure, presence of relative humidity, and constant operating temperature). The response to CH4 was analyzed over different gas flows and different gas concentrations under the same operating regime. The materials were fully characterized by adsorption-desorption isotherms, H2-Temperature Programmed Reduction (H2-TPR), X-ray Diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Scanning Electron Microscopy (SEM), and Raman spectroscopies. Thus, the applicative aspect of using CeO2:Mn3O4 as moderate temperature CMC for CH4 detection is brought to the fore.</description><subject>Aluminum oxide</subject><subject>Calibration</subject><subject>Catalytic converters</subject><subject>Cerium oxides</subject><subject>Combustion</subject><subject>Gas flow</subject><subject>Gas-surface interactions</subject><subject>Manganese oxides</subject><subject>Metal oxides</subject><subject>Methane</subject><subject>Morphology</subject><subject>Operating temperature</subject><subject>Photoelectrons</subject><subject>Poisoning</subject><subject>Porous materials</subject><subject>Ratios</subject><subject>Relative humidity</subject><subject>Sensors</subject><subject>Solid solutions</subject><subject>Substrates</subject><subject>Thermal conductivity</subject><subject>Thick films</subject><subject>Transistors</subject><subject>X ray photoelectron spectroscopy</subject><issn>1996-1944</issn><issn>1996-1944</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpdkVtLHTEUhUOpVFFf_AWBvkhhNLe5xIdCO60XUA4UfQ6ZZI-NzCSnSUYQ_3xzVLQ2L3uT9WWRvRdCB5QccS7J8awpJ5JR2XxAO1TKpqJSiI__9NtoP6U7Ug7ntGPyE9rmTBDOGrGDHntYsZMrz1cC9zrr6SE7g6-ciaHqg7-HmCEmfL14sHgMEffnAv-ADCa74PF3ncp9ad7e9mEelvSkLt5CxL9AT3i1hqiz87dF99Zt5LSHtkY9Jdh_qbvo5vTndX9eXa7OLvpvl5XhHc-VMRasHKltBWNNy_hg69q0krMaDOma1o6E1dyOo2By0I3pYLBWG902ksqh5rvo67PvehlmsAZ8jnpS6-hmHR9U0E69V7z7rW7DvWpZLXhLisHhi0EMfxZIWc0uGZgm7SEsSW22SQQRVBb083_oXViiL-M9UV0JgDeF-vJMlTWnFGF8_QwlahOreouV_wUlb5QU</recordid><startdate>20200511</startdate><enddate>20200511</enddate><creator>Simion, Cristian E.</creator><creator>Florea, Ovidiu G.</creator><creator>Florea, Mihaela</creator><creator>Neaţu, Florentina</creator><creator>Neaţu, Ştefan</creator><creator>Trandafir, Mihaela M.</creator><creator>Stănoiu, Adelina</creator><general>MDPI AG</general><general>MDPI</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>7X8</scope><scope>5PM</scope><orcidid>https://orcid.org/0000-0002-6612-6090</orcidid><orcidid>https://orcid.org/0000-0002-0098-0542</orcidid></search><sort><creationdate>20200511</creationdate><title>CeO2:Mn3O4 Catalytic Micro-Converters Tuned for CH4 Detection Based on Catalytic Combustion under Real Operating Conditions</title><author>Simion, Cristian E. ; Florea, Ovidiu G. ; Florea, Mihaela ; Neaţu, Florentina ; Neaţu, Ştefan ; Trandafir, Mihaela M. ; Stănoiu, Adelina</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c383t-ccded9f1d74226723bd55c79325ec0867df0253dff429ba6c8ebddaca76919b53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Aluminum oxide</topic><topic>Calibration</topic><topic>Catalytic converters</topic><topic>Cerium oxides</topic><topic>Combustion</topic><topic>Gas flow</topic><topic>Gas-surface interactions</topic><topic>Manganese oxides</topic><topic>Metal oxides</topic><topic>Methane</topic><topic>Morphology</topic><topic>Operating temperature</topic><topic>Photoelectrons</topic><topic>Poisoning</topic><topic>Porous materials</topic><topic>Ratios</topic><topic>Relative humidity</topic><topic>Sensors</topic><topic>Solid solutions</topic><topic>Substrates</topic><topic>Thermal conductivity</topic><topic>Thick films</topic><topic>Transistors</topic><topic>X ray photoelectron spectroscopy</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Simion, Cristian E.</creatorcontrib><creatorcontrib>Florea, Ovidiu G.</creatorcontrib><creatorcontrib>Florea, Mihaela</creatorcontrib><creatorcontrib>Neaţu, Florentina</creatorcontrib><creatorcontrib>Neaţu, Ştefan</creatorcontrib><creatorcontrib>Trandafir, Mihaela M.</creatorcontrib><creatorcontrib>Stănoiu, Adelina</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection (ProQuest)</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>Materials Research Database</collection><collection>Materials Science Database</collection><collection>Materials Science Collection</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Simion, Cristian E.</au><au>Florea, Ovidiu G.</au><au>Florea, Mihaela</au><au>Neaţu, Florentina</au><au>Neaţu, Ştefan</au><au>Trandafir, Mihaela M.</au><au>Stănoiu, Adelina</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>CeO2:Mn3O4 Catalytic Micro-Converters Tuned for CH4 Detection Based on Catalytic Combustion under Real Operating Conditions</atitle><jtitle>Materials</jtitle><date>2020-05-11</date><risdate>2020</risdate><volume>13</volume><issue>9</issue><spage>2196</spage><pages>2196-</pages><issn>1996-1944</issn><eissn>1996-1944</eissn><abstract>Mesoporous CeO2:Mn3O4 materials (3:7 and 7:3 molar ratio) were prepared by co-precipitation and deposited as porous thick films over alumina (Al2O3) planar substrate provided with Pt meander. The aim was oriented towards detecting low levels methane (CH4) at moderate operating temperatures. Herein we demonstrated that the sensitivity of catalytic micro-converters (CMCs) towards a given peak of CH4 concentration corresponds to specific gas-surface interaction phenomena. More precisely, a transition from thermal conductivity to combustion rate is likely to occur when CMCs are operated under real atmospheric conditions (normal pressure, presence of relative humidity, and constant operating temperature). The response to CH4 was analyzed over different gas flows and different gas concentrations under the same operating regime. The materials were fully characterized by adsorption-desorption isotherms, H2-Temperature Programmed Reduction (H2-TPR), X-ray Diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Scanning Electron Microscopy (SEM), and Raman spectroscopies. Thus, the applicative aspect of using CeO2:Mn3O4 as moderate temperature CMC for CH4 detection is brought to the fore.</abstract><cop>Basel</cop><pub>MDPI AG</pub><pmid>32403264</pmid><doi>10.3390/ma13092196</doi><orcidid>https://orcid.org/0000-0002-6612-6090</orcidid><orcidid>https://orcid.org/0000-0002-0098-0542</orcidid><oa>free_for_read</oa></addata></record> |
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| ispartof | Materials, 2020-05, Vol.13 (9), p.2196 |
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| subjects | Aluminum oxide Calibration Catalytic converters Cerium oxides Combustion Gas flow Gas-surface interactions Manganese oxides Metal oxides Methane Morphology Operating temperature Photoelectrons Poisoning Porous materials Ratios Relative humidity Sensors Solid solutions Substrates Thermal conductivity Thick films Transistors X ray photoelectron spectroscopy |
| title | CeO2:Mn3O4 Catalytic Micro-Converters Tuned for CH4 Detection Based on Catalytic Combustion under Real Operating Conditions |
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