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Enhanced low-temperature NO oxidation by iron-modified MnO2 catalysts
Catalysis Communications ( IF 3.7 ) Pub Date : 2018-09-11 , DOI: 10.1016/j.catcom.2018.09.005
Jingbo Jia , Rui Ran , Xingguo Guo , Xiaodong Wu , Wei Chen , Duan Weng

Series of Fe-modified MnO2 catalysts were prepared to improve low-temperature NO oxidation. Introduction of Fe3+ resulted in a phase transformation from α-MnO2 to ε-MnO2. Hexagonal Fe0.32MnO2 exhibited the highest activity with the lowest T50 of 156 °C and the maximum NO conversion of 80% at 250 °C. It also possessed the best reducibility and abundant readily available oxygen species, which facilitated the oxidation of NO. Major differences in the NO oxidation reaction route between α-MnO2 and Fe0.32MnO2 were the adsorption sites and the type of intermediates. The synergetic effect between Fe and Mn enhanced the activation of NO and O2.



中文翻译:

铁改性MnO 2催化剂增强的低温NO氧化

制备了一系列铁改性的MnO 2催化剂,以改善低温NO的氧化。的Fe的引入3+导致从α-MnO的相变2至ε-的MnO 2。六角形Fe 0.32 MnO 2表现出最高的活性,最低的T 50为156°C,在250°C时的最大NO转化率为80%。它还具有最佳的还原性和丰富的可利用的氧,可促进NO的氧化。在α-MnO的之间的NO氧化反应路线的主要差别2和Fe 0.32的MnO 2是吸附位点和中间体的类型。Fe和Mn之间的协同作用增强了NO和O 2的活化。

更新日期:2018-09-11
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