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汽车尾气净化用Pt/ZrO2-CeO2催化剂的表征与性能
CHARACTERIZATION AND PROPERTIES OF Pt/ZrO 2 CeO 2 CATALYST FOR PURIFICATION OF AUTOMOTIVE EXHAUST
【摘要】 汽车尾气净化用三效催化剂是一个多元复合型催化剂．以氧化铈或氧化铝为载体的催化剂其物理化学性质及催化性能已有报道［１，２］，但载体氧化铈中添加氧化锆对催化剂性能影响的报道并不多．本文利用Ｈ２ＴＰＲ，ＣＯＴＰＤ和贮氧量测定等技术表征了ＣｅＯ２中加入Ｚ...
【Abstract】 The effect of additive ZrO 2 in CeO 2 on the properties of the three way catalyst is studied by using H 2 TPR, CO TPD, oxygen storage capacity (OSC) measurement and three way catalytic reaction. The results show that support ZrO 2 CeO 2 has higher OSC than CeO 2 and that Pt/ZrO 2 CeO 2 catalyst has higher OSC than Pt/CeO 2. Pt/ZrO 2 CeO 2 catalyst is reduced at below 200℃ and Pt/CeO 2 catalyst at below 300℃. The second desorption temperature of CO on Pt/ZrO 2 CeO 2 is at 570℃ and that on Pt/CeO 2 is at 620℃. Therefore, Pt/ZrO 2 CeO 2 catalyst shows higher activity than Pt/CeO 2 in three way catalytic reaction.
【Key words】 platinum； zirconia； ceria； supported catalyst； temperature programmed reduction； temperature programmed desorption； oxygen storage capacity； catalytic activity；
- 【文献出处】 催化学报 ,CHINESE JOURNAL OF CATALYSIS , 编辑部邮箱 ,1999年01期
- 【分类号】X5,O643
- 【被引频次】49
- 【下载频次】413