Mn-based catalysts supported on γ-Al2O3, TiO2 and MCM-41: a comparison for low-temperature NO oxidation with low ratio of O3/NO
Mn-Based catalysts supported on γ-Al2O3, TiO2 and MCM-41 synthesized by an impregnation method were compared to evaluate their NO catalytic oxidation performance with low ratio O3/NO at low temperature (80–200 °C). Activity tests showed that the participation of O3 remarkably promoted the NO oxidati...
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| Veröffentlicht in: | RSC advances 2021-06, Vol.11 (31), p.18945-18959 |
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| creator | Liu, Lijun Shen, Boxiong Meng Si Yuan, Peng Lu, Fengju Gao, Hongpei Yao, Yan Cai, Liang Xu, Hongjie |
| description | Mn-Based catalysts supported on γ-Al2O3, TiO2 and MCM-41 synthesized by an impregnation method were compared to evaluate their NO catalytic oxidation performance with low ratio O3/NO at low temperature (80–200 °C). Activity tests showed that the participation of O3 remarkably promoted the NO oxidation. The catalytic oxidation performance of the three catalysts decreased in the following order: Mn/γ-Al2O3 > Mn/TiO2 > Mn/MCM-41, indicating that Mn/γ-Al2O3 exhibited the best catalytic activity. In addition, there was a clear synergistic effect between Mn/γ-Al2O3 and O3, followed by Mn/TiO2 and O3. The characterization results of XRD, EDS mapping, BET, H2-TPR, XPS and TG showed that Mn/γ-Al2O3 had good manganese dispersion, excellent redox properties, appropriate amounts of coexisting Mn3+ and Mn4+ and abundant chemically adsorbed oxygen, which ensured its good performance. In situ DRIFTS demonstrated the NO adsorption performance on the catalyst surface. As revealed by in situ DRIFTS experiments, the chemically adsorbed oxygen, mainly from the decomposition of O3, greatly promoted the NO adsorption and the formation of nitrates. The Mn-based catalysts showed stronger adsorption strength than the corresponding pure supports. Due to the abundant adsorption sites provided by pure γ-Al2O3, under the interaction of Mn and γ-Al2O3, the Mn/γ-Al2O3 catalyst exhibited the strongest NO adsorption performance among the three catalysts and produced lots of monodentate nitrates (–O–NO2) and bidentate nitrates (–O2NO), which were the vital intermediate species for NO2 formation. Moreover, the NO–TPD studies also demonstrated that Mn/γ-Al2O3 showed the best NO desorption performance among the three catalysts. The good NO adsorption and desorption characteristics of Mn/γ-Al2O3 improved its high catalytic activity. In addition, the activity test results also suggested that Mn/γ-Al2O3 exhibited good SO2 tolerance. |
| doi_str_mv | 10.1039/d1ra01820e |
| format | Article |
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Activity tests showed that the participation of O3 remarkably promoted the NO oxidation. The catalytic oxidation performance of the three catalysts decreased in the following order: Mn/γ-Al2O3 > Mn/TiO2 > Mn/MCM-41, indicating that Mn/γ-Al2O3 exhibited the best catalytic activity. In addition, there was a clear synergistic effect between Mn/γ-Al2O3 and O3, followed by Mn/TiO2 and O3. The characterization results of XRD, EDS mapping, BET, H2-TPR, XPS and TG showed that Mn/γ-Al2O3 had good manganese dispersion, excellent redox properties, appropriate amounts of coexisting Mn3+ and Mn4+ and abundant chemically adsorbed oxygen, which ensured its good performance. In situ DRIFTS demonstrated the NO adsorption performance on the catalyst surface. As revealed by in situ DRIFTS experiments, the chemically adsorbed oxygen, mainly from the decomposition of O3, greatly promoted the NO adsorption and the formation of nitrates. The Mn-based catalysts showed stronger adsorption strength than the corresponding pure supports. Due to the abundant adsorption sites provided by pure γ-Al2O3, under the interaction of Mn and γ-Al2O3, the Mn/γ-Al2O3 catalyst exhibited the strongest NO adsorption performance among the three catalysts and produced lots of monodentate nitrates (–O–NO2) and bidentate nitrates (–O2NO), which were the vital intermediate species for NO2 formation. Moreover, the NO–TPD studies also demonstrated that Mn/γ-Al2O3 showed the best NO desorption performance among the three catalysts. The good NO adsorption and desorption characteristics of Mn/γ-Al2O3 improved its high catalytic activity. In addition, the activity test results also suggested that Mn/γ-Al2O3 exhibited good SO2 tolerance.</description><identifier>ISSN: 2046-2069</identifier><identifier>EISSN: 2046-2069</identifier><identifier>DOI: 10.1039/d1ra01820e</identifier><identifier>PMID: 35478663</identifier><language>eng</language><publisher>Cambridge: Royal Society of Chemistry</publisher><subject>Adsorption ; Aluminum oxide ; Catalysts ; Catalytic activity ; Catalytic oxidation ; Chemistry ; Desorption ; Low temperature ; Manganese ; Nitrates ; Nitrogen dioxide ; Oxidation ; Synergistic effect ; Titanium dioxide ; Transitional aluminas</subject><ispartof>RSC advances, 2021-06, Vol.11 (31), p.18945-18959</ispartof><rights>Copyright Royal Society of Chemistry 2021</rights><rights>This journal is © The Royal Society of Chemistry.</rights><rights>This journal is © The Royal Society of Chemistry 2021 The Royal Society of Chemistry</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC9033454/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC9033454/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,723,776,780,860,881,27901,27902,53766,53768</link.rule.ids></links><search><creatorcontrib>Liu, Lijun</creatorcontrib><creatorcontrib>Shen, Boxiong</creatorcontrib><creatorcontrib>Meng Si</creatorcontrib><creatorcontrib>Yuan, Peng</creatorcontrib><creatorcontrib>Lu, Fengju</creatorcontrib><creatorcontrib>Gao, Hongpei</creatorcontrib><creatorcontrib>Yao, Yan</creatorcontrib><creatorcontrib>Cai, Liang</creatorcontrib><creatorcontrib>Xu, Hongjie</creatorcontrib><title>Mn-based catalysts supported on γ-Al2O3, TiO2 and MCM-41: a comparison for low-temperature NO oxidation with low ratio of O3/NO</title><title>RSC advances</title><description>Mn-Based catalysts supported on γ-Al2O3, TiO2 and MCM-41 synthesized by an impregnation method were compared to evaluate their NO catalytic oxidation performance with low ratio O3/NO at low temperature (80–200 °C). Activity tests showed that the participation of O3 remarkably promoted the NO oxidation. The catalytic oxidation performance of the three catalysts decreased in the following order: Mn/γ-Al2O3 > Mn/TiO2 > Mn/MCM-41, indicating that Mn/γ-Al2O3 exhibited the best catalytic activity. In addition, there was a clear synergistic effect between Mn/γ-Al2O3 and O3, followed by Mn/TiO2 and O3. The characterization results of XRD, EDS mapping, BET, H2-TPR, XPS and TG showed that Mn/γ-Al2O3 had good manganese dispersion, excellent redox properties, appropriate amounts of coexisting Mn3+ and Mn4+ and abundant chemically adsorbed oxygen, which ensured its good performance. In situ DRIFTS demonstrated the NO adsorption performance on the catalyst surface. As revealed by in situ DRIFTS experiments, the chemically adsorbed oxygen, mainly from the decomposition of O3, greatly promoted the NO adsorption and the formation of nitrates. The Mn-based catalysts showed stronger adsorption strength than the corresponding pure supports. Due to the abundant adsorption sites provided by pure γ-Al2O3, under the interaction of Mn and γ-Al2O3, the Mn/γ-Al2O3 catalyst exhibited the strongest NO adsorption performance among the three catalysts and produced lots of monodentate nitrates (–O–NO2) and bidentate nitrates (–O2NO), which were the vital intermediate species for NO2 formation. Moreover, the NO–TPD studies also demonstrated that Mn/γ-Al2O3 showed the best NO desorption performance among the three catalysts. The good NO adsorption and desorption characteristics of Mn/γ-Al2O3 improved its high catalytic activity. In addition, the activity test results also suggested that Mn/γ-Al2O3 exhibited good SO2 tolerance.</description><subject>Adsorption</subject><subject>Aluminum oxide</subject><subject>Catalysts</subject><subject>Catalytic activity</subject><subject>Catalytic oxidation</subject><subject>Chemistry</subject><subject>Desorption</subject><subject>Low temperature</subject><subject>Manganese</subject><subject>Nitrates</subject><subject>Nitrogen dioxide</subject><subject>Oxidation</subject><subject>Synergistic effect</subject><subject>Titanium dioxide</subject><subject>Transitional aluminas</subject><issn>2046-2069</issn><issn>2046-2069</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNpdj8FO3DAQhi3UChDl0iew1EsPTbE99mzSQyW0amklllzoOZpNZotREqe2U8qNd-p78EwNggN0LjPzz6dPGiHeavVRK6hOOh1J6dIo3hOHRlksjMLq1bP5QByndK2WQqcN6n1xAM6uSkQ4FHebsdhS4k62lKm_TTnJNE9TiHnJwijv_xanvanhg7z0tZE0dnKz3hRWf5Ik2zBMFH1auF2Isg83ReZh4kh5jiwvahn--I6yX4Abn68eCBkfdhl2soaTi_qNeL2jPvHxUz8SP75-uVx_K87rs-_r0_NiMrDKRalK3WLFjKpSCNaWS2wVEzBq0znUW2JE2-5UhQYVtVRx2TGXinXVMhyJz4_ead4O3LU85kh9M0U_ULxtAvnm5WX0V83P8LupFIB1dhG8fxLE8GvmlJvBp5b7nkYOc2oMOlxZBMAFffcfeh3mOC7vNcYBgDNOOfgHCFmGrA</recordid><startdate>20210605</startdate><enddate>20210605</enddate><creator>Liu, Lijun</creator><creator>Shen, Boxiong</creator><creator>Meng Si</creator><creator>Yuan, Peng</creator><creator>Lu, Fengju</creator><creator>Gao, Hongpei</creator><creator>Yao, Yan</creator><creator>Cai, Liang</creator><creator>Xu, Hongjie</creator><general>Royal Society of Chemistry</general><general>The Royal Society of Chemistry</general><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>7X8</scope><scope>5PM</scope></search><sort><creationdate>20210605</creationdate><title>Mn-based catalysts supported on γ-Al2O3, TiO2 and MCM-41: a comparison for low-temperature NO oxidation with low ratio of O3/NO</title><author>Liu, Lijun ; Shen, Boxiong ; Meng Si ; Yuan, Peng ; Lu, Fengju ; Gao, Hongpei ; Yao, Yan ; Cai, Liang ; Xu, Hongjie</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-p237t-8081c69ee60906344823740ea3e612d561bae664cf096260aca9e8dee80e19ce3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Adsorption</topic><topic>Aluminum oxide</topic><topic>Catalysts</topic><topic>Catalytic activity</topic><topic>Catalytic oxidation</topic><topic>Chemistry</topic><topic>Desorption</topic><topic>Low temperature</topic><topic>Manganese</topic><topic>Nitrates</topic><topic>Nitrogen dioxide</topic><topic>Oxidation</topic><topic>Synergistic effect</topic><topic>Titanium dioxide</topic><topic>Transitional aluminas</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Liu, Lijun</creatorcontrib><creatorcontrib>Shen, Boxiong</creatorcontrib><creatorcontrib>Meng Si</creatorcontrib><creatorcontrib>Yuan, Peng</creatorcontrib><creatorcontrib>Lu, Fengju</creatorcontrib><creatorcontrib>Gao, Hongpei</creatorcontrib><creatorcontrib>Yao, Yan</creatorcontrib><creatorcontrib>Cai, Liang</creatorcontrib><creatorcontrib>Xu, Hongjie</creatorcontrib><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>RSC advances</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Liu, Lijun</au><au>Shen, Boxiong</au><au>Meng Si</au><au>Yuan, Peng</au><au>Lu, Fengju</au><au>Gao, Hongpei</au><au>Yao, Yan</au><au>Cai, Liang</au><au>Xu, Hongjie</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Mn-based catalysts supported on γ-Al2O3, TiO2 and MCM-41: a comparison for low-temperature NO oxidation with low ratio of O3/NO</atitle><jtitle>RSC advances</jtitle><date>2021-06-05</date><risdate>2021</risdate><volume>11</volume><issue>31</issue><spage>18945</spage><epage>18959</epage><pages>18945-18959</pages><issn>2046-2069</issn><eissn>2046-2069</eissn><abstract>Mn-Based catalysts supported on γ-Al2O3, TiO2 and MCM-41 synthesized by an impregnation method were compared to evaluate their NO catalytic oxidation performance with low ratio O3/NO at low temperature (80–200 °C). Activity tests showed that the participation of O3 remarkably promoted the NO oxidation. The catalytic oxidation performance of the three catalysts decreased in the following order: Mn/γ-Al2O3 > Mn/TiO2 > Mn/MCM-41, indicating that Mn/γ-Al2O3 exhibited the best catalytic activity. In addition, there was a clear synergistic effect between Mn/γ-Al2O3 and O3, followed by Mn/TiO2 and O3. The characterization results of XRD, EDS mapping, BET, H2-TPR, XPS and TG showed that Mn/γ-Al2O3 had good manganese dispersion, excellent redox properties, appropriate amounts of coexisting Mn3+ and Mn4+ and abundant chemically adsorbed oxygen, which ensured its good performance. In situ DRIFTS demonstrated the NO adsorption performance on the catalyst surface. As revealed by in situ DRIFTS experiments, the chemically adsorbed oxygen, mainly from the decomposition of O3, greatly promoted the NO adsorption and the formation of nitrates. The Mn-based catalysts showed stronger adsorption strength than the corresponding pure supports. Due to the abundant adsorption sites provided by pure γ-Al2O3, under the interaction of Mn and γ-Al2O3, the Mn/γ-Al2O3 catalyst exhibited the strongest NO adsorption performance among the three catalysts and produced lots of monodentate nitrates (–O–NO2) and bidentate nitrates (–O2NO), which were the vital intermediate species for NO2 formation. Moreover, the NO–TPD studies also demonstrated that Mn/γ-Al2O3 showed the best NO desorption performance among the three catalysts. The good NO adsorption and desorption characteristics of Mn/γ-Al2O3 improved its high catalytic activity. In addition, the activity test results also suggested that Mn/γ-Al2O3 exhibited good SO2 tolerance.</abstract><cop>Cambridge</cop><pub>Royal Society of Chemistry</pub><pmid>35478663</pmid><doi>10.1039/d1ra01820e</doi><tpages>15</tpages><oa>free_for_read</oa></addata></record> |
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| source | DOAJ Directory of Open Access Journals; EZB-FREE-00999 freely available EZB journals; PubMed Central; PubMed Central Open Access |
| subjects | Adsorption Aluminum oxide Catalysts Catalytic activity Catalytic oxidation Chemistry Desorption Low temperature Manganese Nitrates Nitrogen dioxide Oxidation Synergistic effect Titanium dioxide Transitional aluminas |
| title | Mn-based catalysts supported on γ-Al2O3, TiO2 and MCM-41: a comparison for low-temperature NO oxidation with low ratio of O3/NO |
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