Structure dependence and reaction mechanism of CO oxidation: A model study on macroporous CeO₂ and CeO₂-ZrO₂ catalysts

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• 作者：Yane Zheng^a ; ^b ; Kongzhai Li^a ; ^b ; ^{kongzhai.li@aliyun.com} ; ^{kongzhai.li@foxmail.com} ; Hua Wang^a ; Yuhao Wang^a ; ^b ; Dong Tian^a ; ^b ; Yonggang Wei^a ; ^b ; Xing Zhu^a ; ^b ; Chunhua Zeng^a ; Yongming Luo^c
• 关键词：3DOM CeO2-ZrO2 ; CO oxidation ; Oxygen vacancy ; In situ DRIFTs ; Reaction mechanism
• 刊名：Journal of Catalysis
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：344
• 期：Complete
• 页码：365-377
• 全文大小：4154 K
• 卷排序：344

文摘

3DOM catalysts exhibited much higher catalytic activity for CO oxidation than the nonporous samples. The preferentially exposed surface plane and oxygen vacancy concentration are crucial for determining the catalytic activity. The reaction pathway of CO oxidation is closely related to the oxygen vacancy concentration and low concentration of oxygen vacancy would result in the buildup of carbonate species.