Mn–Ce–VO_x/TiO₂ (MnCeVTi), Mn–CeO_x/TiO₂ (MnCeTi) and Mn–VO_x/TiO₂ (MnVTi) nanocomposites as SCR DeNO_x catalysts were synthesized by a modified sol–gel method. All catalysts shows high NO_x conversion of over 90% at low temperature between 125 and 200 °C with GHSV of 30,000 h⁻¹. MnCeVTi catalyst demonstrates the highest NO_x conversion and produces the least byproduct N₂O at 110–310 °C. The co-presence of Ce, V and Mn inhibits the growth of rutile, decreases crystallinity of anatase TiO₂ and manganese oxides, reduces grain size, increases BET specific surface area and pore volume. There are most chemisorbed oxygen, appropriate Mn³⁺/Mn⁴⁺ and the synergistic effect of Ce and V on MnCeVTi sample. The acid sites on MnCeVTi are most below 280 °C and in widest temperature range. Lewis acid sites play a leading role in SCR reaction on MnCeVTi catalyst. These helps to optimize the SCR catalytic performance of MnCeVTi, on which E-R and L–H mechanism may coexist in the reaction.

通过改进的溶胶-凝胶法合成了Mn-Ce-VO _x / TiO ₂（MnCeVTi），Mn-CeO _x / TiO ₂（MnCeTi）和Mn-VO _x / TiO ₂（MnVTi）纳米复合材料作为SCR DeNO _x催化剂。所有的催化剂显示出高的NO _X的90％的转化率在低温下125和200℃之间30000ħGHSV ^-1。MnCeVTi催化剂在110–310°C下表现出最高的NO _x转化率和最少的副产物N ₂ O。Ce，V和Mn的共存会抑制金红石的生长，降低锐钛矿型TiO _2的结晶度和锰氧化物，减小晶粒尺寸，增加BET比表面积和孔体积。化学吸附的氧最多，合适的Mn ³⁺ / Mn ⁴⁺以及Ce和V对MnCeVTi样品的协同作用。MnCeVTi上的酸位最低于280°C，且处于最宽的温度范围。路易斯酸位点在MnCeVTi催化剂的SCR反应中起主要作用。这些有助于优化MnCeVTi的SCR催化性能，在该催化性能上ER和L–H机理可能共存。