Catalytic Performance and in Situ Surface Chemistry of Pure α‑MnO2 Nanorods in Selective Reduction of NO and N2O with CO
Search of catalysts made of nonprecious metal for reduction of nitric oxide is important for having a sustainable environment. Catalytic performances of α-MnO2 nanorods in reduction of nitric oxide and nitrous oxide by carbon monoxide were investigated. Surface chemistry of α-MnO2 catalyst during ca...
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| Veröffentlicht in: | Journal of physical chemistry. C 2013-04, Vol.117 (16), p.8329-8335 |
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| container_end_page | 8335 |
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| container_issue | 16 |
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| container_title | Journal of physical chemistry. C |
| container_volume | 117 |
| creator | Shan, Junjun Zhu, Yuan Zhang, Shiran Zhu, Tong Rouvimov, Sergei Tao, Franklin (Feng) |
| description | Search of catalysts made of nonprecious metal for reduction of nitric oxide is important for having a sustainable environment. Catalytic performances of α-MnO2 nanorods in reduction of nitric oxide and nitrous oxide by carbon monoxide were investigated. Surface chemistry of α-MnO2 catalyst during catalysis was tracked with ambient pressure X-ray photoelectron spectroscopy. Correlation between catalytic performance and the corresponding in situ surface chemistry during catalysis revealed that Mn3+ ions and oxygen vacancies are active catalytic sites. Bulk phase of α-MnO2 nanorods below the catalyst surface is restructured to Mn3O4 in catalysis. Kinetics studies suggested that the reduction of nitric oxide with CO is performed through the formation of the intermediate N2O with a followed dissociation to N2. This study suggested restructuring of transition metal oxides can tune catalytic performance and even develop catalysts. |
| doi_str_mv | 10.1021/jp4018103 |
| format | Article |
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Catalytic performances of α-MnO2 nanorods in reduction of nitric oxide and nitrous oxide by carbon monoxide were investigated. Surface chemistry of α-MnO2 catalyst during catalysis was tracked with ambient pressure X-ray photoelectron spectroscopy. Correlation between catalytic performance and the corresponding in situ surface chemistry during catalysis revealed that Mn3+ ions and oxygen vacancies are active catalytic sites. Bulk phase of α-MnO2 nanorods below the catalyst surface is restructured to Mn3O4 in catalysis. Kinetics studies suggested that the reduction of nitric oxide with CO is performed through the formation of the intermediate N2O with a followed dissociation to N2. 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This study suggested restructuring of transition metal oxides can tune catalytic performance and even develop catalysts.</description><subject>Catalysis</subject><subject>Catalysts: preparations and properties</subject><subject>Chemistry</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Materials science</subject><subject>Nanocrystalline materials</subject><subject>Nanoscale materials and structures: fabrication and characterization</subject><subject>Nanotubes</subject><subject>Other topics in nanoscale materials and structures</subject><subject>Physics</subject><subject>Theory of reactions, general kinetics. Catalysis. 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Catalytic performances of α-MnO2 nanorods in reduction of nitric oxide and nitrous oxide by carbon monoxide were investigated. Surface chemistry of α-MnO2 catalyst during catalysis was tracked with ambient pressure X-ray photoelectron spectroscopy. Correlation between catalytic performance and the corresponding in situ surface chemistry during catalysis revealed that Mn3+ ions and oxygen vacancies are active catalytic sites. Bulk phase of α-MnO2 nanorods below the catalyst surface is restructured to Mn3O4 in catalysis. Kinetics studies suggested that the reduction of nitric oxide with CO is performed through the formation of the intermediate N2O with a followed dissociation to N2. This study suggested restructuring of transition metal oxides can tune catalytic performance and even develop catalysts.</abstract><cop>Columbus, OH</cop><pub>American Chemical Society</pub><doi>10.1021/jp4018103</doi><tpages>7</tpages></addata></record> |
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| ispartof | Journal of physical chemistry. C, 2013-04, Vol.117 (16), p.8329-8335 |
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| source | American Chemical Society Publications |
| subjects | Catalysis Catalysts: preparations and properties Chemistry Cross-disciplinary physics: materials science rheology Exact sciences and technology General and physical chemistry Materials science Nanocrystalline materials Nanoscale materials and structures: fabrication and characterization Nanotubes Other topics in nanoscale materials and structures Physics Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry |
| title | Catalytic Performance and in Situ Surface Chemistry of Pure α‑MnO2 Nanorods in Selective Reduction of NO and N2O with CO |
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