Modification of SmMn<sub>2</sub>O<sub>5</sub> Catalyst with Silver for Soot Oxidation: Ag Loading and Metal–Support Interactions
A series of Ag-modified manganese-mullite (SmMn<sub>2</sub>O<sub>5</sub>) catalysts with different Ag contents (1, 3, and 6 wt.%) were prepared via a citric acid sol–gel method for catalytic soot oxidation. The catalysts were characterized by powder X-ray diffraction (XRD), B...
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MDPI AG
2024-02-01
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| Online Access: | https://www.mdpi.com/2073-4344/14/2/135 |
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| author | Baofang Jin Yuxin Liu Yue Ma Zhenguo Li Kaixiang Li Shuang Liu Rui Ran Xiaodong Wu |
| author_facet | Baofang Jin Yuxin Liu Yue Ma Zhenguo Li Kaixiang Li Shuang Liu Rui Ran Xiaodong Wu |
| author_sort | Baofang Jin |
| collection | DOAJ |
| description | A series of Ag-modified manganese-mullite (SmMn<sub>2</sub>O<sub>5</sub>) catalysts with different Ag contents (1, 3, and 6 wt.%) were prepared via a citric acid sol–gel method for catalytic soot oxidation. The catalysts were characterized by powder X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), Raman spectroscopy, transmission electron microscopy (TEM), high-resolution transmission electron microscopy analysis (HRTEM), X-ray photoelectron spectroscopy (XPS), and H<sub>2</sub> temperature-programmed reduction (H<sub>2</sub>-TPR). The soot oxidation activity of the mullite was significantly promoted by the addition of silver and affected by the loading amount of the metal. Herein, the influences of silver loading on the metal size distribution and its interactions with the mullite were studied. Based on these characterizations, a possible soot oxidation reaction mechanism was proposed for silver-modified SmMn<sub>2</sub>O<sub>5</sub>. |
| first_indexed | 2024-03-07T22:38:39Z |
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| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-07T22:38:39Z |
| publishDate | 2024-02-01 |
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| spelling | doaj.art-6dc93325a03a4abd8ea25836a2c3e6532024-02-23T15:11:32ZengMDPI AGCatalysts2073-43442024-02-0114213510.3390/catal14020135Modification of SmMn<sub>2</sub>O<sub>5</sub> Catalyst with Silver for Soot Oxidation: Ag Loading and Metal–Support InteractionsBaofang Jin0Yuxin Liu1Yue Ma2Zhenguo Li3Kaixiang Li4Shuang Liu5Rui Ran6Xiaodong Wu7The Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, ChinaThe Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, ChinaThe Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, ChinaNational Engineering Laboratory for Mobile Source Emission Control Technology, China Automotive Technology & Research Center, Tianjin 300300, ChinaNational Engineering Laboratory for Mobile Source Emission Control Technology, China Automotive Technology & Research Center, Tianjin 300300, ChinaSchool of Materials Science and Engineering, Ocean University of China, Qingdao 266100, ChinaThe Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, ChinaThe Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, ChinaA series of Ag-modified manganese-mullite (SmMn<sub>2</sub>O<sub>5</sub>) catalysts with different Ag contents (1, 3, and 6 wt.%) were prepared via a citric acid sol–gel method for catalytic soot oxidation. The catalysts were characterized by powder X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), Raman spectroscopy, transmission electron microscopy (TEM), high-resolution transmission electron microscopy analysis (HRTEM), X-ray photoelectron spectroscopy (XPS), and H<sub>2</sub> temperature-programmed reduction (H<sub>2</sub>-TPR). The soot oxidation activity of the mullite was significantly promoted by the addition of silver and affected by the loading amount of the metal. Herein, the influences of silver loading on the metal size distribution and its interactions with the mullite were studied. Based on these characterizations, a possible soot oxidation reaction mechanism was proposed for silver-modified SmMn<sub>2</sub>O<sub>5</sub>.https://www.mdpi.com/2073-4344/14/2/135Mn-based mulliteAg modificationsoot oxidationmetal dispersionmetal–support interactionoxygen activation |
| spellingShingle | Baofang Jin Yuxin Liu Yue Ma Zhenguo Li Kaixiang Li Shuang Liu Rui Ran Xiaodong Wu Modification of SmMn<sub>2</sub>O<sub>5</sub> Catalyst with Silver for Soot Oxidation: Ag Loading and Metal–Support Interactions Catalysts Mn-based mullite Ag modification soot oxidation metal dispersion metal–support interaction oxygen activation |
| title | Modification of SmMn<sub>2</sub>O<sub>5</sub> Catalyst with Silver for Soot Oxidation: Ag Loading and Metal–Support Interactions |
| title_full | Modification of SmMn<sub>2</sub>O<sub>5</sub> Catalyst with Silver for Soot Oxidation: Ag Loading and Metal–Support Interactions |
| title_fullStr | Modification of SmMn<sub>2</sub>O<sub>5</sub> Catalyst with Silver for Soot Oxidation: Ag Loading and Metal–Support Interactions |
| title_full_unstemmed | Modification of SmMn<sub>2</sub>O<sub>5</sub> Catalyst with Silver for Soot Oxidation: Ag Loading and Metal–Support Interactions |
| title_short | Modification of SmMn<sub>2</sub>O<sub>5</sub> Catalyst with Silver for Soot Oxidation: Ag Loading and Metal–Support Interactions |
| title_sort | modification of smmn sub 2 sub o sub 5 sub catalyst with silver for soot oxidation ag loading and metal support interactions |
| topic | Mn-based mullite Ag modification soot oxidation metal dispersion metal–support interaction oxygen activation |
| url | https://www.mdpi.com/2073-4344/14/2/135 |
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