The Critical Role of Oxygen Vacancies in N 2 O Decomposition Over Cobalt-Doped CeO 2 Catalysts

作者：Xin Wang, Rucheng Duan, Zhuocan Li, Meng Gao, Yu Fu, Yinghui Han, Guangzhi He, Hong He · 发表于：Environmental Science & Technology · 年份：2025 · DOI：10.1021/acs.est.5c00180 · 被引用次数：61 · 研究领域：Catalytic Processes in Materials Science、Catalysis and Oxidation Reactions、Catalysis and Hydrodesulfurization Studies

Catalytic decomposition is a promising method for N 2 O removal, and the nature of active sites on the catalysts is under debate. The combination of experimental observations and density functional theory (DFT) calculations indicates that oxygen vacancies in the metal oxide catalysts serve as the active sites for N 2 O decomposition. Co doping in CeO 2 significantly increases the content of oxygen vacancies, thereby enhancing the activity of the catalyst for N 2 O decomposition. A catalyst with Co/Ce = 1 exhibited the best activity, with a T 90 of 375 °C and excellent stability maintained for over 100 h, which is much better than that of Co 3 O 4 spinel. The finding advances the understanding of active sites in the N 2 O catalytic decomposition and contributes to the design of highly efficient catalysts.