Room-temperature catalytic removal of low-concentration NO over mesoporous Fe-Mn binary oxide synthesized using a template-free approach

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• 作者：Zhu Shu^a ; Yu Chen^a ; Weimin Huang^a ; Xiangzhi Cui^a ; Lingxia Zhang^a ; Hangrong Chen^a ; Guobin Zhang^a ; Xiangqian Fan^a ; Yongxia Wang^a ; Guiju Tao^a ; Dannong He^b ; Jianlin Shi^a ; ^{jlshi@sunm.shcnc.ac.cn}
• 关键词：Mesoporous Fe&ndash ; Mn binary oxide ; Low-concentration NO ; Catalytic oxidation ; Adsorption ; Room temperature
• 刊名：Applied Catalysis B: Environmental
• 出版年：2013
• 出版时间：August-September, 2013
• 年：2013
• 卷：140-141
• 期：Complete
• 页码：42-50
• 全文大小：3582 K

文摘

A novel template-free approach, the controlled thermal decomposition of single-phase Fe-Mn binary oxalate, was proposed and used to synthesize mesoporous Fe-Mn binary oxide, which possessed homogeneous worm-like mesopores (4-5 nm) and high surface areas above 200 m²/g. The catalyst was efficient in the catalytic removal of low-concentration NO at room temperature: 100 % removal of 10 ppm NO in the first 4 h at a high space velocity of 40,000 h^?1 on a Fe-Mn binary oxide with a Fe/Mn ratio of 1/4 calcined at 300 ¡ãC. Catalysts with other Fe/Mn ratios or calcined at higher temperatures showed lower NO removal performances. A synergetic effect between Mnⁿ⁺ and Feⁿ⁺ was proposed and believed to be responsible for the catalytic conversion of NO and O₂ into NO₂, which was subsequently adsorbed and/or absorbed as nitrates on the binary oxide.