用共沉淀法合成了镁铝水滑石和含铜镁铝水滑石 ,通过热活化 ,得到了含铜催化剂(CuHT)和不含铜催化剂 (HT) .XRD研究表明两种催化剂中都存在着MgO和Spinel晶相 .在无氧体系中 ,与HT相比 ,CuHT对NO和CO反应具有高的催化活性和宽的活性温度窗口 .反应体系中少量氧气的引入对CuHT的反应活性无影响 ,但使HT的活性增加 ;氧气过量时 ,CuHT对NO和CO反应很快失活 ,而HT却保持着较高的活性 . Mg-Al hydrotalcite and Mg-Al-Mg-Al hydrotalcite were synthesized by co-precipitation method, Cu-Cu-containing catalysts and Cu-free catalysts were obtained by thermal activation.The results of XRD indicated that MgO And Spinel crystal phase.In the anaerobic system, compared with HT, CuHT has high catalytic activity and wide active temperature window for the reaction of NO and CO. The introduction of a small amount of oxygen in the reaction system has no effect on the reactivity of CuHT, The activity of HT increased; when oxygen was excessive, CuHT quickly deactivated NO and CO, while HT maintained high activity.