Influence of cobalt on performance of Cu-CeO2 catalysts for preferential oxidation of CO

作     者：Sachin Malwadkar Parthasarathi Bera C.V.V.Satyanarayana Sachin Malwadkar;Parthasarathi Bera;C.V.V. Satyanarayana

作者机构：Catalysis DivisionCSIR-National Chemical LaboratoryPune 411008India Surface Engineering DivisionCSIR-National Aerospace LaboratoriesBengaluru 560017India 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2020年第38卷第9期

页      面：941-950,I0001页

核心收录：

学科分类：0808[工学-电气工程] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：Project supported by Council of Scientific and Industrial Research Government of India through a Senior Research Fellowship 

主　　题：CO-PROX Cu-CeO2 XRD XPS Methanation H2O addition 

摘      要：Copper and cobalt oxides supported on CeO2 were investigated for preferential oxidation of carbon monoxide(CO-PROX)in the presence of excess hydrogen and CO2.(Cuo)1-x(Co3 O4)x/3-(CeO2)2.5(x=0,0.25,0.50,0.75,0.85 and 1)catalysts were prepared by coprecipitation *** mixed oxide catalysts were characterized by several physicochemical techniques,such as BET surface area(SBET),X-ray diffraction(XRD),high resolution transmission electron microscopy(HRTEM),temperature programmed reduction(TPR)and X-ray photoelectron spectroscopy(XPS).XRD studies show the peaks related to CuO and Co3 O4 phases in copper and cobalt containing CeO2 *** average particle size of the CeO2 crystallites is in the range of 8-10 nm as evaluated from HRTEM *** studies demonstrate that Cu,Co and Ce in(cuO)1-x(Co3O4)x/3-(CeO2)2.5 catalysts are presented in+2 and+1,+3 and+2 and+4 and+3 oxidation states,*** catalyst with x=0.75 shows better activity and selectivity towards *** the catalyst with only copper(CuO-CeO2,x=0)shows good activity but reverse water gas shift(RWGS)reaction is noticed at high *** the other hand,RWGS reaction is suppressed on the cobalt containing CuO-ceO2 *** on CeO2 with x=1 shows hardly any activity for PRoX reaction at low *** methanation activity is observed on CuO-CeO2 or Co3O4-CeO2 *** contrast,combination of copper and cobalt on CeO2 shows methanation of CO where enhanced activity is observed with increasing in cobalt content.