Mn-doped CeO<sub>2</sub> Nanorod Supported Au Catalysts for Dehydrogenation of Ethane with CO<sub>2</sub>

Dehydrogenation of ethane to ethylene was investigated in the presence of CO<sub>2</sub> 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, result...

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Bibliographic Details
Main Authors: Tianqi Lei, Hongyao Guo, Changxi Miao, Weiming Hua, Yinghong Yue, Zi Gao
Format: Article
Language:English
Published: MDPI AG 2019-01-01
Series:Catalysts
Subjects:
Online Access:https://www.mdpi.com/2073-4344/9/2/119
Description
Summary:Dehydrogenation of ethane to ethylene was investigated in the presence of CO<sub>2</sub> 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 CO<sub>2</sub> improved the stability of the catalysts remarkably, since CO<sub>2</sub> can sustainably replenish the reducible oxygen species and eliminate the coke on the surface of the catalysts, which was proved by the H<sub>2</sub>-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.
ISSN:2073-4344