Cr－Ag／γ－Al_2O_3催化剂在CO氧化反应中Ag的助催化作用  

Promoter Action of Ag on Cr-Ag/γ-Al_2O,_3 Catalyst for CO Oxidation

作　　者：陈平[1] 朱波[1] 钟依均[1] 罗孟飞[1] 李少华[1] 吴红丽[1] 

机构地区：[1]杭州大学催化研究所,杭州大学中心实验室,浙江师范大学,温州市环境监测站

出　　处：《应用化学》1996年第4期89-91,共3页Chinese Journal of Applied Chemistry

摘　　要：Ｃｒ－Ａｇ／γ－Ａｌ_２Ｏ_３催化剂在ＣＯ氧化反应中Ａｇ的助催化作用陈平，朱波，钟依均，罗孟飞，李少华，吴红丽（杭州大学催化研究所杭州３１００２８）（杭州大学中心实验室杭州）关键词氧化铬，氧化银，氧化铝，负载催化剂，还原特性，一氧化碳，氧化活性催化燃烧...A series ofγ-Al_2O_3-supported Cr-Ag bimetallic and individual mono-metallic catalysts was prepared by wetness impregnation method.The oxidation activity of CO was determined in a gas flow system. The effect of promoter Ag was studied by BET, XRD and TPR. The activity of Cr/γ-Al_2O_3 catalyst for CO oxidation was relatively poor. As the silver loading increased , the temperature of 100% coversion of CO over Ag/γ-Al_2O_3 catalysts decreased rapidly. The oxidation activity of catalyst was evidently enhanced by the addition of Ag, and increased with the content of Ag. The result of TPR showed that Ag could substantially change the reducibility of catalyst, TM decreased about 75℃ ,and the oxidation activity of catalyst was promoted.

关 键 词：氧化铬 氧化银 氧化铝 催化剂 一氧化碳 氧化 银 

分 类 号：O643.36[理学—物理化学] O613.71[理学—化学]