Preferential oxidation of GO in H2 rich stream over Au/CeO2-Co3O4 catalysts

摘要

Au/CeO2-Co3O4 catalysts with a Ce/Co atomic ratio from 0.1 to 0.6 were prepared by deposition-precipitation;their catalytic performance in preferential oxidation(PROX)of CO in H2 rich stream was investigated.Au/CeO2-Co3O4 exhibits much higher catalytic activity in CO PROX than Au/Co3O4 and Au/CeO2;over Au/CeO2-Co3O4,100% CO conversion with 75% selectivity to CO2 can be achieved even at ambient temperature.Typically,for CO PROX at 80°C over oxidation pretreated Au/CeO2-Co3O4(Ce/Co= 0.2),91% CO conversion and 51% selectivity to CO2 can last for 260 h.