Low-Temperature NH<sub>3</sub>-SCR on Ce<sub>x</sub>-Mn-Ti<sub>y</sub> Mixed Oxide Catalysts: Improved Performance by the Mutual Effect between Ce and Ti
A series of Ce<sub>x</sub>-Mn-Ti<sub>y</sub> catalysts were synthesized using the coprecipitation method, and sodium carbonate solution was used as a precipitant. The various catalysts were assessed by selective catalytic reduction of NO<sub>x</sub> with NH<sub...
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MDPI AG
2022-04-01
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| Online Access: | https://www.mdpi.com/2073-4344/12/5/471 |
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| author | Qianwen Zhu Aiyong Wang Jinshui Zhang Yanglong Guo Yun Guo Li Wang Wangcheng Zhan |
| author_facet | Qianwen Zhu Aiyong Wang Jinshui Zhang Yanglong Guo Yun Guo Li Wang Wangcheng Zhan |
| author_sort | Qianwen Zhu |
| collection | DOAJ |
| description | A series of Ce<sub>x</sub>-Mn-Ti<sub>y</sub> catalysts were synthesized using the coprecipitation method, and sodium carbonate solution was used as a precipitant. The various catalysts were assessed by selective catalytic reduction of NO<sub>x</sub> with NH<sub>3</sub>, and characterized by X-ray diffraction, Raman spectroscopy, H<sub>2</sub> temperature-programmed reduction, NH<sub>3</sub> temperature-programmed desorption, and X-ray photoelectron spectroscopy to investigate the physicochemical properties, surface acidity, and redox abilities of the Ce<sub>x</sub>-Mn-Ti<sub>y</sub> catalysts. The Ce<sub>0.1</sub>-Mn-Ti<sub>0.1</sub> catalyst exhibited the best catalytic performance (more than 90% NO<sub>x</sub> conversion in the range of 75 to 225 °C), as a result of proper redox ability, abundant acid sites, high content of Mn<sup>4+</sup> and Ce<sup>3+</sup>, and surface-adsorbed oxygen (O<sub>S</sub>). The results of in situ DRIFT spectroscopy showed that the NH<sub>3</sub>-SCR reaction followed both the E-R and L-H paths over the Ce<sub>0.1</sub>-Mn-Ti<sub>0.1</sub> catalyst, and it occurred faster and more sharply when it mainly abided by the E-R mechanism. |
| first_indexed | 2024-03-10T03:11:22Z |
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| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T03:11:22Z |
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| series | Catalysts |
| spelling | doaj.art-2de67a642c65471faec783b116a9427b2023-11-23T10:25:20ZengMDPI AGCatalysts2073-43442022-04-0112547110.3390/catal12050471Low-Temperature NH<sub>3</sub>-SCR on Ce<sub>x</sub>-Mn-Ti<sub>y</sub> Mixed Oxide Catalysts: Improved Performance by the Mutual Effect between Ce and TiQianwen Zhu0Aiyong Wang1Jinshui Zhang2Yanglong Guo3Yun Guo4Li Wang5Wangcheng Zhan6Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, ChinaInternational Joint Laboratory of Catalytic Chemistry, Department of Chemistry, Research Center of Nano Science and Technology, College of Sciences, Shanghai University, Shanghai 200444, ChinaState Key Laboratory of Photocatalysis on Energy and Environment College of Chemistry, Fuzhou University, Fuzhou 350116, ChinaKey Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, ChinaKey Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, ChinaKey Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, ChinaKey Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, ChinaA series of Ce<sub>x</sub>-Mn-Ti<sub>y</sub> catalysts were synthesized using the coprecipitation method, and sodium carbonate solution was used as a precipitant. The various catalysts were assessed by selective catalytic reduction of NO<sub>x</sub> with NH<sub>3</sub>, and characterized by X-ray diffraction, Raman spectroscopy, H<sub>2</sub> temperature-programmed reduction, NH<sub>3</sub> temperature-programmed desorption, and X-ray photoelectron spectroscopy to investigate the physicochemical properties, surface acidity, and redox abilities of the Ce<sub>x</sub>-Mn-Ti<sub>y</sub> catalysts. The Ce<sub>0.1</sub>-Mn-Ti<sub>0.1</sub> catalyst exhibited the best catalytic performance (more than 90% NO<sub>x</sub> conversion in the range of 75 to 225 °C), as a result of proper redox ability, abundant acid sites, high content of Mn<sup>4+</sup> and Ce<sup>3+</sup>, and surface-adsorbed oxygen (O<sub>S</sub>). The results of in situ DRIFT spectroscopy showed that the NH<sub>3</sub>-SCR reaction followed both the E-R and L-H paths over the Ce<sub>0.1</sub>-Mn-Ti<sub>0.1</sub> catalyst, and it occurred faster and more sharply when it mainly abided by the E-R mechanism.https://www.mdpi.com/2073-4344/12/5/471Ce<sub>x</sub>-Mn-Ti<sub>y</sub> catalystsselective catalytic reductionsynergistic effect |
| spellingShingle | Qianwen Zhu Aiyong Wang Jinshui Zhang Yanglong Guo Yun Guo Li Wang Wangcheng Zhan Low-Temperature NH<sub>3</sub>-SCR on Ce<sub>x</sub>-Mn-Ti<sub>y</sub> Mixed Oxide Catalysts: Improved Performance by the Mutual Effect between Ce and Ti Catalysts Ce<sub>x</sub>-Mn-Ti<sub>y</sub> catalysts selective catalytic reduction synergistic effect |
| title | Low-Temperature NH<sub>3</sub>-SCR on Ce<sub>x</sub>-Mn-Ti<sub>y</sub> Mixed Oxide Catalysts: Improved Performance by the Mutual Effect between Ce and Ti |
| title_full | Low-Temperature NH<sub>3</sub>-SCR on Ce<sub>x</sub>-Mn-Ti<sub>y</sub> Mixed Oxide Catalysts: Improved Performance by the Mutual Effect between Ce and Ti |
| title_fullStr | Low-Temperature NH<sub>3</sub>-SCR on Ce<sub>x</sub>-Mn-Ti<sub>y</sub> Mixed Oxide Catalysts: Improved Performance by the Mutual Effect between Ce and Ti |
| title_full_unstemmed | Low-Temperature NH<sub>3</sub>-SCR on Ce<sub>x</sub>-Mn-Ti<sub>y</sub> Mixed Oxide Catalysts: Improved Performance by the Mutual Effect between Ce and Ti |
| title_short | Low-Temperature NH<sub>3</sub>-SCR on Ce<sub>x</sub>-Mn-Ti<sub>y</sub> Mixed Oxide Catalysts: Improved Performance by the Mutual Effect between Ce and Ti |
| title_sort | low temperature nh sub 3 sub scr on ce sub x sub mn ti sub y sub mixed oxide catalysts improved performance by the mutual effect between ce and ti |
| topic | Ce<sub>x</sub>-Mn-Ti<sub>y</sub> catalysts selective catalytic reduction synergistic effect |
| url | https://www.mdpi.com/2073-4344/12/5/471 |
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