钾对氧化铜催化活性炭还原NO反应的助催化作用  

Promoting Role of Potassium on the Catalytic Performance of Copper Oxide for the Reduction of NO by Activated Carbon

作　　者：冯柄楠[1] 卢冠忠[1] 王艳芹[1] 郭耘[1] 郭杨龙[1] 

机构地区：[1]华东理工大学结构可控先进功能材料及其制备教育部重点实验室工业催化研究所,上海200237

出　　处：《催化学报》2011年第5期853-861,共9页

基　　金：国家重点基础研究发展计划(973计划;2010CB732300);国家科技支撑计划(2007BAJ03B01)~~

摘　　要：研究了活性炭负载的Cu-K-O复合氧化物催化剂上碳还原NO的反应.结果表明,K的加入可有效地提高CuO催化剂的活性和稳定性,当Cu/K的质量比为2时催化性能最佳.X射线衍射、X射线光电子能谱和程序升温脱附-质谱等结果表明,K与Cu间的协同作用可促进表面碳活化中心与表面氧物种生成CO2的反应,保持表面Cu2+活性中心的数量,从而有利于Cu2+/Cu+反应循环的进行.The reduction of NO by activated carbon over a Cu-K-O mixed oxide catalyst was investigated.We found that the addition of K to CuO obviously improved its catalytic performance and stability,and the optimum Cu/K weight ratio is 2.Characterization by X-ray photoelectron spectroscopy,X-ray diffraction,and temperature-programmed desorption shows that the presence of K can promote the reaction between the surface carbon active sites and the surface oxygen species to form CO2 by a synergetic effect between Cu and K.Additionally,a higher surface concentration of Cu 2＋ is retained,which favors the Cu^2＋ /Cu^＋ reduction cycle on the active sites.

关 键 词：钾 氧化铜 活性炭 一氧化氮 选择性催化还原 

分 类 号：X13[环境科学与工程—环境科学]