The effect of self-doping Ti³⁺ into V₂O₅/TiO₂ catalysts on the activity of the catalysts was assessed by the selective catalytic reduction of NO_X with NH₃ (NH₃-SCR). 0.2-V₂O₅/TiO₂ (Al(acac)₃:TBOT = 0.2%) catalyst had the highest catalytic activity at low-temperature range. The as-prepared catalysts are characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance (EPR), H₂ temperature-programmed reduction (H₂-TPR), NH₃ temperature-programmed desorption (NH₃-TPD), surface area and pore structure. XPS and EPR were used to confirm the existence of Ti³⁺ and oxygen vacancy in the catalysts. The specific surface area, surface acidity, reducibility and valence state of the active components of the catalysts are significantly affected by the self-doping of Ti³+. This work would lead to a new strategic design of Ti³⁺ self-doped catalysts with fine structure and that can efficiently improve low-temperature SCR performance.

通过用NH ₃（NH ₃ -SCR）选择性催化还原NO _X评估了自掺杂Ti ³⁺到V ₂ O ₅ / TiO ₂催化剂中对催化剂活性的影响。0.2-V ₂ O ₅ / TiO ₂（Al（acac）₃：TBOT = 0.2％）催化剂在低温范围内具有最高的催化活性。所制备的催化剂的特征在于X射线衍射（XRD），X射线光电子能谱（XPS），电子顺磁共振（EPR），H _2程序升温还原（H ₂ -TPR），NH ₃程序升温脱附（NH ₃ -TPD），表面积和孔结构。XPS和EPR用于确认催化剂中Ti ³⁺的存在和氧空位。催化剂活性成分的比表面积，表面酸度，还原性和化合价态受到Ti ³ +自掺杂的显着影响。这项工作将导致具有精细结构的Ti ³⁺自掺杂催化剂的新战略设计，并且可以有效提高低温SCR性能。