Pr-modified Fe–Mn/TiO2 (x Pr) catalysts with high activity and excellent SO2 resistance were prepared and used for the selective catalytic reduction of NO with NH3 (NH3-SCR) at low-temperatures. Pr can inhibit FeOx and MnOx crystallization and stabilize the high valence states of Fe and Mn, maintaining the catalyst’s high activity and stability at low temperatures. Doping with Pr diminished the ammonium sulfate deposition and alleviated the sulfation, improving the catalysts’ sulfur resistance.

中文翻译：

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用于低温 NH3-SCR 的具有高活性和 SO2 耐受性的 Pr 掺杂改性 Fe-Mn/TiO2 催化剂

制备了具有高活性和优异抗 SO2 性能的 Pr 改性 Fe-Mn/TiO2 (x Pr) 催化剂，并将其用于低温下用 NH3 (NH3-SCR) 选择性催化还原 NO。Pr可以抑制FeOx和MnOx结晶，稳定Fe和Mn的高价态，保持催化剂在低温下的高活性和稳定性。掺杂Pr减少了硫酸铵沉积并减轻了硫酸化，提高了催化剂的抗硫性。