添加Ag对Cu／γ－Al_2O_3催化剂  

Effect of the Performance of Cu/γ-Al_2O_3 Catalyst with the Addition of Ag

作　　者：朱波[1] 罗孟飞[1] 仲逸芬 李斌峰[1] 袁贤鑫[1] 陈平[1] 吴红丽[1] 

机构地区：[1]杭州大学催化研究所,杭州大学化学系,杭州大学中心实验室

出　　处：《高等学校化学学报》1995年第12期1921-1925,共5页Chemical Journal of Chinese Universities

基　　金：浙江省教育委员会基金

摘　　要：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 BET, XRD, TPR techniques and the measurement of catalytic activity for benzene and acetone oxidation were used to study the reducibility and activity of Cu/γ-Al2O3, Cu-Ag/γ-Al2O3 catalysts.It is found that different TPR profiles are produced with different metal contents, and different copper species are present on the surface of catalysts.With addition of Ag, there is an obvious displacement between the TPR profiles of γ-Al2O3-supported Cu-Ag and Cu catalysts, and the activity of catalyst for benzene and acetone oxidation is enhanced. The results showed that the forms of copper species,the reducibility and the catalytic activity of catalysts are affected by the variation of treatment temperature.The addition of Ag, to some extent, can improve the thermal stability of catalyst.

关 键 词：催化剂 还原特性 铜 氧化铝 添加 银 

分 类 号：TQ426.8[化学工程] O643.36[理学—物理化学]