Active sites over CuO/CeO2 and inverse CeO2/CuO catalysts for preferential CO oxidation

The Ce4Cu4 and Ce4Cu1 catalysts possess high BET surface area, suggesting that the resistance ability to H2O and CO2 may be closely related the BET surface area. In addition, it is found that the resistance to H2O and CO2 is also associated with the crystallite sizes of CuO and the reduction behavior of catalysts.