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相比汽油车而言,柴油车具有高效、低油耗的优势已得到广泛应用。本实验以ZrO_2作为改性剂,探究了ZrO_2与Al_2O_3的质量比对催化剂的影响。结果表明:随着ZrO_2的加入,Pt粒子先减小后增大;Pt粒子与载体的交互作用先增大后减小。活性实验数据的分析表明,ZrO2的最佳添加质量分数为40%,CO和C_3H_6完全氧化温度分别降低20和25℃。贵金属在催化剂的分散度以及贵金属与载体的相互作用随着ZrO_2与Al_2O_3质量比的变化而变化。Pt粒子越小,其与载体的交互作用越强,这表明催化剂性能越强。
Compared to gasoline vehicles, diesel vehicles with high efficiency, low fuel consumption advantages have been widely used. In this experiment, ZrO 2 as a modifier to explore the mass ratio of ZrO 2 and Al 2 O 3 on the catalyst. The results show that with the addition of ZrO 2, the Pt particles first decrease and then increase; the interaction between Pt particles and the carrier first increases and then decreases. The analysis of the experimental data shows that the optimal mass fraction of ZrO2 is 40%, and the complete oxidation temperature of CO and C_3H_6 is reduced by 20 and 25 ℃, respectively. The dispersion of noble metal in catalyst and the interaction between noble metal and support vary with the mass ratio of ZrO 2 to Al 2 O 3. The smaller the Pt particles, the stronger their interaction with the support, indicating the stronger the catalyst performance.