Synthesis and Optimization of Foam Copper-Based CoMnO x @Co 3 O 4 /CF Catalyst: Achieving Efficient Catalytic Oxidation of Paraxylene

作者：Youxiao Xu, Guangfei Qu, Huanhuan Wu, Chenyang Zhao, Rui Xu, Ping Ning, Junyan Li · 发表于：ACS Applied Materials & Interfaces · 年份：2024 · DOI：10.1021/acsami.4c11647 · 被引用次数：10 · 研究领域：Catalytic Processes in Materials Science、Catalysis and Hydrodesulfurization Studies、Catalysis and Oxidation Reactions

This study successfully developed a foam copper (CF)-based CoMnO x @Co 3 O 4 /CF composite catalyst, achieving efficient thermal catalytic oxidation of paraxylene through multifactor optimization of synthesis conditions. At a Co:Mn molar ratio of 2:1 and a calcination temperature of 450 °C, the catalyst exhibited outstanding catalytic performance, with a T 90 temperature as low as 246 °C, significantly lower than that of catalysts synthesized under other conditions. Additionally, BET, XPS, Raman, EPR, and H 2 -TPR test results indicate that the catalyst possesses a high specific surface area, abundant oxygen vacancies, a distribution of multivalent Co and Mn species, and a lower hydrogen reduction temperature, all of which contribute to the high catalytic activity of CoMnO x @Co 3 O 4 /CF. Furthermore, in situ DRIFTS confirmed that the oxidation of paraxylene on CoMnO x @Co 3 O 4 /CF follows the Mars–Van Krevelen (MvK) mechanism. The proposed reaction pathway begins with the oxidation of the methyl group on paraxylene, followed by the opening of the benzene ring and further oxidation to CO 2 and H 2 O. The innovative structural design and excellent catalytic performance of this catalyst provide new insights and solutions for the industrial treatment of VOCs.