运用ＢＥＴ、ＸＲＤ、ＴＰＲ及苯和丙酮氧化活性测定等方法研究了Ｃｕ／γ－Ａｌ_２Ｏ_３和Ｃｕ－Ａｇ／γ－Ａｌ_２Ｏ_３催化剂的还原性能和对有机物的催化活性。结果表明：不同金属负载量的Ｃｕ／γ－Ａｌ_２Ｏ_３催化剂的还原性能有明显差异，反映出催化剂表面存在着不同种类的铜物种。Ａｇ的添加使催化剂的ＴＰＲ峰位发生明显位移，提高了催化剂对有机物的催化氧化活性。同时还发现，热处理温度对催化剂中铜物种的存在形式、催化还原特性及催化活性有明显影响．Ａｇ在一定程度上提高了催化剂的热稳定性。 The reduction performance and catalytic activity of Cu / γ-Al_2O_3 and Cu-Ag / γ-Al_2O_3 catalysts were investigated by BET, XRD, TPR and benzene and acetone oxidation. The results show that the reducibility of Cu / γ-Al 2 O 3 catalysts with different metal loadings is obviously different, which shows that there are different copper species on the catalyst surface. The addition of Ag significantly shifts the TPR peak of the catalyst and improves the catalytic activity of the catalyst for organic compounds. At the same time, it was also found that the heat treatment temperature had obvious influence on the existing form, catalytic reduction and catalytic activity of copper species in the catalyst. Ag to a certain extent, improve the thermal stability of the catalyst.