中文摘要：

采用浸渍法制备了一系列负载Ru催化剂，并将其应用于NO催化氧化反应．同时，对Ru／ZrO2样品在不同温度下进行焙烧处理，并通过X-射线衍射（XRD）、程序升温还原（TPR）和透射电子显微镜（TEM）等技术对不同温度焙烧的Ru／ZrO2进行表征，根据表征结果对导致Ru／ZrO2催化活性下降的原因进行了探讨．结果表明，Ru／ZrO2催化剂具有很好的催化活性，在空速为180000h^-1条件下，275℃时即可获得93％的NO转化率．高温焙烧会导致Ru／ZrO2催化活性明显下降．

英文摘要：

A series of Ru catalysts were prepared by impregnation and their catalytic activity for the oxidation of NO to NO2 was evaluated. Among all the catalysts studied, the Ru/ZrO2 catalyst exhibited the best activity and a maximal NO conversion of ca. 93% could be achieved at ca. 275℃at a high GHSV of 180000 h^-1. Then the Ru/ZrO2 samples were calcined at different temperatures and it was found that calcination at high temperatures leads to a considerable decrease in the activity of the Ru/ZrO2 catalyst. The Ru/ZrO2 catalysts calcined at different temperatures were characterized by means of X-ray diffraction （XRD）, temperature-programmed reduction （TPR） and transmission electron microscopy （TEM） to elucidate the reason for the decrease in the catalytic activity of Ru/ZrO2 after high temperature calcination.