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| Oxalate route for promoting activity of manganese oxide catalysts in total VOCs' oxidation: effect of calcination temperature and preparation method | |
| Alternative Title | J. Mater. Chem. A |
Tang, Wenxiang1,3; Wu, Xiaofeng1; Li, Dongyan1,3; Wang, Zhen2; Liu, Gang1,3; Liu, Haidi1; Chen, Yunfa1
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| 2014 | |
| Source Publication | JOURNAL OF MATERIALS CHEMISTRY A
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| ISSN | 2050-7488 |
| Volume | 2Issue:8Pages:2544-2554 |
| Abstract | A novel template-free oxalate route was applied to synthesize mesoporous manganese oxides with high surface area (355 m(2) g(-1)) and well-defined mesopores which can be obtained in large quantities. The physicochemical properties of the materials were characterized by means of TG, XRD, SEM, TEM, H-2-TPR and XPS techniques. All catalysts were tested on catalytic deep oxidation of benzene, and the effects of calcination temperature on the features of catalyst structure and catalytic activity were investigated. Manganese oxides prepared by oxalate route exhibited better catalytic activities for complete oxidation of benzene, toluene and o-xylene as compared with related manganese oxides prepared by other different methods (NaOH route, NH4HCO3 route and nanocasting strategy), and especially the temperature for benzene conversion of 90% on the oxalate-derived manganese oxide catalysts was 209 degrees C, which is 132 degrees C lower than required for the catalyst prepared by NaOH route. The catalytic performance of manganese oxide is correlated with surface area, pore size, low-temperature reducibility and distribution of surface species. The mole ratio of Mn4+/Mn2+ on the samples which performed with better catalytic activity was close to 1.0. This is good for the redox process of Mn4+ <-> Mn3+ <-> Mn2+ which is the key factor in determining the activity on MnOx, further indicating that the oxalate route is good for keeping the distribution of manganese oxidation states at an appropriate degree. A possible process of VOCs' complete oxidation on manganese oxide catalysts is discussed. In addition, the best catalyst was highly stable with prolonged time on stream and was resistant to water vapor.; A novel template-free oxalate route was applied to synthesize mesoporous manganese oxides with high surface area (355 m(2) g(-1)) and well-defined mesopores which can be obtained in large quantities. The physicochemical properties of the materials were characterized by means of TG, XRD, SEM, TEM, H-2-TPR and XPS techniques. All catalysts were tested on catalytic deep oxidation of benzene, and the effects of calcination temperature on the features of catalyst structure and catalytic activity were investigated. Manganese oxides prepared by oxalate route exhibited better catalytic activities for complete oxidation of benzene, toluene and o-xylene as compared with related manganese oxides prepared by other different methods (NaOH route, NH4HCO3 route and nanocasting strategy), and especially the temperature for benzene conversion of 90% on the oxalate-derived manganese oxide catalysts was 209 degrees C, which is 132 degrees C lower than required for the catalyst prepared by NaOH route. The catalytic performance of manganese oxide is correlated with surface area, pore size, low-temperature reducibility and distribution of surface species. The mole ratio of Mn4+/Mn2+ on the samples which performed with better catalytic activity was close to 1.0. This is good for the redox process of Mn4+ <-> Mn3+ <-> Mn2+ which is the key factor in determining the activity on MnOx, further indicating that the oxalate route is good for keeping the distribution of manganese oxidation states at an appropriate degree. A possible process of VOCs' complete oxidation on manganese oxide catalysts is discussed. In addition, the best catalyst was highly stable with prolonged time on stream and was resistant to water vapor. |
| Keyword | Volatile Organic-compounds Benzene Combustion Lattice Oxygen Air-pollution Ethyl-acetate Co Oxidation Gas-phase Toluene Removal Mnox |
| Subtype | Article |
| WOS Headings | Science & Technology ; Physical Sciences ; Technology |
| DOI | 10.1039/c3ta13847j |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | VOLATILE ORGANIC-COMPOUNDS ; BENZENE COMBUSTION ; LATTICE OXYGEN ; AIR-POLLUTION ; ETHYL-ACETATE ; CO OXIDATION ; GAS-PHASE ; TOLUENE ; REMOVAL ; MNOX |
| WOS Research Area | Chemistry ; Energy & Fuels ; Materials Science |
| WOS Subject | Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary |
| WOS ID | WOS:000331247500014 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Version | 出版稿 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/8157 |
| Collection | 研究所（批量导入） |
| Affiliation | 1.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China 2.Natl Ctr Nanosci & Technol, CAS Key Lab Standardizat & Measurement Nanotechno, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Tang, Wenxiang,Wu, Xiaofeng,Li, Dongyan,et al. Oxalate route for promoting activity of manganese oxide catalysts in total VOCs' oxidation: effect of calcination temperature and preparation method[J]. JOURNAL OF MATERIALS CHEMISTRY A,2014,2(8):2544-2554. |
| APA | Tang, Wenxiang.,Wu, Xiaofeng.,Li, Dongyan.,Wang, Zhen.,Liu, Gang.,...&Chen, Yunfa.(2014).Oxalate route for promoting activity of manganese oxide catalysts in total VOCs' oxidation: effect of calcination temperature and preparation method.JOURNAL OF MATERIALS CHEMISTRY A,2(8),2544-2554. |
| MLA | Tang, Wenxiang,et al."Oxalate route for promoting activity of manganese oxide catalysts in total VOCs' oxidation: effect of calcination temperature and preparation method".JOURNAL OF MATERIALS CHEMISTRY A 2.8(2014):2544-2554. |
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| Oxalate route for pr（1564KB） | 限制开放 | CC BY-NC-SA | Application Full Text | |||
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