载体对Cu基催化剂富氢条件下CO氧化性能的影响  

Effects of various supports on CO oxidation over Cu-based catalysts in H_2-rich gases

作　　者：龚磊[1,2] 张宁[1] 罗来涛[1] 王亮[1] 敖志勇[1] 

机构地区：[1]南昌大学理学院化学系,江西南昌330031 [2]江西农业大学理学院化学系,江西南昌330045

出　　处：《化学研究与应用》2010年第7期915-919,共5页Chemical Research and Application

基　　金：江西省自然科学基金(2007GZH2643)项目资助

摘　　要：CeO2,MnOx and ZnO were used as supports of Cu-based catalysts respectively in this study.The influences of these supports on the catalyst for CO oxidation in H2-rich gases were investigated.The catalysts were characterized by XRD(X-ray diffraction),BET(BET surface area),TPD(Temperature-programmed desorption) and TPR(Temperature-programmed reduction) methods.The results indicate that CuO/CeO2 catalyst has higher catalytic activity,for CO oxidation than CuO/MnO or CuO/ZnO catalyst.The CO conversion of CuO/CeO2 catalyst at 413K and 433K are 85% and 97%,respectively.Comparing with the other two catalysts,CuO/CeO2 catalyst has larger surface area,pore volume,CO adsorption amount and reduction peak area,while lower CO desorption and reduction temperature.Besides there is a stronger metal-support interaction in CuO/CeO2 catalyst than in other catalysts.All these favour the activity of the catalyst.CeO2,MnOx and ZnO were used as supports of Cu-based catalysts respectively in this study.The influences of these supports on the catalyst for CO oxidation in H2-rich gases were investigated.The catalysts were characterized by XRD（X-ray diffraction）,BET（BET surface area）,TPD（Temperature-programmed desorption） and TPR（Temperature-programmed reduction） methods.The results indicate that CuO/CeO2 catalyst has higher catalytic activity,for CO oxidation than CuO/MnO or CuO/ZnO catalyst.The CO conversion of CuO/CeO2 catalyst at 413K and 433K are 85% and 97%,respectively.Comparing with the other two catalysts,CuO/CeO2 catalyst has larger surface area,pore volume,CO adsorption amount and reduction peak area,while lower CO desorption and reduction temperature.Besides there is a stronger metal-support interaction in CuO/CeO2 catalyst than in other catalysts.All these favour the activity of the catalyst.

关 键 词：载体 CuO催化剂 CO选择性氧化 富氢 

分 类 号：O643.3[理学—物理化学]