采用氧化还原共沉淀法制备了MnOx-SnO2复合氧化物,并将其用于低温NH3选择催化还原NO反应. 结果表明, Mn/(Mn+Sn)摩尔比为75%的催化剂具有最好的低温催化活性,在120～200 ℃温度范围内得到100%的NO转化率. 氮吸附-脱附、X射线衍射和X射线光电子能谱测试表明,高比表面积、Mn-Sn固溶体的形成和高氧化态的Mn物种是催化剂催化活性较高的主要原因.
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