铈对混合型贵金属尾气净化催化剂性能的影响

INFLUENCE OF CERIUM ON THE NOBLE METALS PURIFICATION CATALYST

系统地研究了CeO2对负载型混合贵金属催化剂性能的影响,考察了模拟尾气排放条件下铈对催化剂CO氧化性能的影响,并应用XRD、TPD等手段对CeO2在催化剂中的作用机理进行了研究。结果表明,添加助剂后催化剂活性明显提高,铈的添加改变了催化剂的吸附性能,有利于降低催化反应的活化能。

Catalytic technique is a key technology to purify automobile exhaust gas. In this work, the effect of cerium on noble metals catalyst was investigated by CO oxidation under the condition of exhausting, XRD and TPD were used to examine the affect of rare earth on catalyst. It has been shown that the addition of cerium can increase the catalytic activity, improve the absorbing quantity of catalyst, and benefit to low the activity energy of the catalytic reaction.