Employing nanocasting method, mesoporous MnO₂ catalysts with large specific surface area and regular pore structure were synthesized by using three different types of mesostructure silicas (KIT-6, SBA-15, MCM-41) as hard templates. The physical and chemical properties of the three different mesostructured manganese oxide materials were comparatively and systematically characterized by using XRD, FT-IR, N₂ adsorption-desorption, TEM, NH₃-TPD, H₂-TPR, XPS. The NH₃-SCR performance of the mesoporous MnO₂ was also evaluated on SCR self-assembly device. It was discovered that the mesostructure of the template would influence the amount and the kind of acid site, the reduction ability and then influence the catalytic performance of the materials. Mesoporous MnO₂ templated from KIT-6 exhibited better catalytic performance than other mesoporous MnO₂, indicating that the mesostructure of the materials has significant influence on the NH₃-SCR performance. The KIT-6 templated MnO₂ could induce 100% NO_x conservation ratio range from 75 °C to 275 °C and exhibit good resistance of SO₂ and H₂O.

采用纳米浇铸法，以三种不同类型的介孔结构二氧化硅（KIT-6，SBA-15，MCM-41）为硬模板，合成了比表面积大，孔结构规则的介孔MnO ₂催化剂。通过XRD，FT-IR，N ₂吸附-脱附，TEM，NH ₃ -TPD，H ₂ -TPR，XPS对三种不同的介孔结构锰氧化物材料的理化性质进行了比较和系统的表征。介孔MnO ₂的NH ₃ -SCR性能在SCR自组装装置上也进行了评估。发现模板的介观结构会影响酸位的数量和种类，还原能力，进而影响材料的催化性能。以KIT-6为模板的介孔MnO ₂具有比其他介孔MnO ₂更好的催化性能，表明材料的介孔结构对NH ₃ -SCR性能有重要影响。KIT-6模板化的MnO ₂可以在75°C至275°C范围内诱导100％的NO _x守恒比，并具有良好的SO ₂和H ₂ O耐受性。