An exploration of soot oxidation over CeO₂-ZrO₂ nanocubes: Do more surface oxygen vacancies benefit the reaction?

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• 作者：Shuang Liu^a ; ^{luciferosa@sina.com} ; ^{lius@ouc.edu.cn} ; Xiaodong Wu^b ; ^{wuxiaodong@tsinghua.edu.cn} ; Jia Tang^a ; ¹ ; Pengyu Cui^a ; ¹ ; Xiaoqian Jiang^a ; ¹ ; Chenggong Chang^a ; ¹ ; Wei Liu^a ; Yuxi Gao^b ; Min Li^c ; Duan Weng^b
• 关键词：CeO2-ZrO2 nanocubes ; Soot oxidation ; Surface oxygen vacancy ; Ox&minus ;   ; &rarr ;   ; O2&minus ; transformation ; Surface oxygen regeneration
• 刊名：Catalysis Today
• 出版年：2017
• 出版时间：1 March 2017
• 年：2017
• 卷：281
• 期：part_P3
• 页码：454-459
• 全文大小：2199 K
• 卷排序：281

文摘

Nanocubic CeO2 based oxides with varied contents of surface VO were synthesized. CeO2 exhibits higher soot oxidation activity and stability than CeO2-ZrO2. Excessive surface oxygen vacancies induce the formation of O2− rather than Ox−. Incomplete regeneration of O2− causes deactivation during soot oxidation. High Ox− availability brings about superior stability of CeO2 during the reaction.