【摘要】 文中采用共沉淀法制备了混合载体质量分数为 1%的Pd/Al2 O3 TiO2 催化剂 ,借助XRD和XPS对样品进行了表征 ,结果表明 :混合载体Al2 O3 TiO2 为无定形结构 ;TiO2 降低了Pd和Al2 O3的相互作用能力。将样品应用于C3H6选择催化还原NO反应 ,以NO转化率为活性评价指标对催化剂的活性进行了对比 ,发现TiO2 的含量对催化剂活性有显著影响 :随着TiO2 质量分数从 0增加至 5 0 %,催化剂活性迅速增加 ;TiO2 质量分数超过 5 0 %,催化剂活性增加趋势变缓更多还原

【Abstract】 A series of 1% Pd/Al₂O₃ TiO₂ catalysts were prepared by co precipitation method. XRD and XPS were used for the catalysts characterization. The characterization results showed that the structure of Al₂O₃ TiO₂ was amorphous. TiO₂ reduced the combination energy between Pd and Al₂O₃. Samples were used for selective catalytic reduction of NO with C 3H 6 and the conversion of NO was taken as the factor for characterizing the catalytic activity. It is found that the content of TiO₂ has a prominent effect on the catalytic activity. As the content of TiO₂ is less than 50%, the catalytic activity is enhanced quickly. The growth of the catalytic activity takes on gradual tendency when the contents of TiO₂ are beyond 50 percent.更多还原