Mn-doped CeO2 Nanorod Supported Au Catalysts for Dehydrogenation of Ethane with CO2
| Autor: | Zi Gao, Weiming Hua, Yinghong Yue, Hongyao Guo, Tianqi Lei, Changxi Miao |
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| Rok vydání: | 2019 |
| Předmět: |
CO2
Ethylene Inorganic chemistry Oxide chemistry.chemical_element lcsh:Chemical technology 010402 general chemistry 01 natural sciences Oxygen Catalysis lcsh:Chemistry chemistry.chemical_compound symbols.namesake Mn-doping CeO2 nanorod lcsh:TP1-1185 Dehydrogenation Physical and Theoretical Chemistry Ethane dehydrogenation 010405 organic chemistry Au catalyst 0104 chemical sciences lcsh:QD1-999 chemistry symbols Nanorod Raman spectroscopy Selectivity |
| Zdroj: | Catalysts Volume 9 Issue 2 Catalysts, Vol 9, Iss 2, p 119 (2019) |
| ISSN: | 2073-4344 |
| Popis: | Dehydrogenation of ethane to ethylene was investigated in the presence of CO2 over Au catalyst supported on an Mn-doped ceria nanorod. The activity can be greatly enhanced by proper Mn doping. Mn was found to preferentially occupy defect sites or surface sites of ceria, resulting in the formation of extra oxide ions. Characterization results indicated that the reducible oxygen species related to ceria might play a vital role in the dehydrogenation. The addition of CO2 improved the stability of the catalysts remarkably, since CO2 can sustainably replenish the reducible oxygen species and eliminate the coke on the surface of the catalysts, which was proved by the H2-TPR and Raman analysis of spent catalysts. An ethane conversion of 17.4% with an ethylene selectivity of 97.5% can be obtained after 44 h of reaction. |
| Databáze: | OpenAIRE |
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