采用新型共沉淀耦合溶剂热法制备SmMnO_x催化剂，其在75℃超低温、100 μL/L SO₂环境中的NO_x转化率大于94%。探究了75~275℃下不同O₂、NO、NH₃体积分数及空速对催化活性的影响。结果表明，催化剂在75℃下具有100% NO_x转化率。XRD、SEM和TG-DTG表征结果表明，SmMnO_x催化剂芦苇花状结构提供了丰富的活性位点和极强的Sm²⁺和Mn⁴⁺电子转移能力，抑制了SO₂的吸附氧化，仅有微量硫铵盐沉积在花状尖端，表现出优异的超低温抗硫性能。

A SmMnO_x catalyst is prepared by using a novel coprecipitation coupled solvothermal method, and can deliver a NO_x conversion more than 94% at 75℃ in the presence of 100 μL·L^-1 SO₂.The effects of different O₂, NO, and NH₃ volume fractions as well as space velocity on catalytic activity are investigated in the range of 75℃ to 275℃.The results indicate that the catalyst exhibits a 100% of NO_x conversion at 75℃.It is shown by XRD, SEM and TG-DTG characterization that the reed flower-like structure of SmMnO_x catalyst provides abundant active sites and accelerates electron transfer of Sm²⁺ and Mn⁴⁺, which inhibits the adsorption oxidation of SO₂.Only trace amount of ammonium sulfate deposits on the flower tip, showing excellent ultra-low temperature sulfur resistance.

张靖(2000-),女,硕士生,研究方向为大气污染控制,1454649944@qq.com