Modulating Cu species in copper–ceria catalyst for boosting CO preferential oxidation: Elucidating the role of ceria crystal plane

Cu/CeO2 catalysts for reverse water gas shift reactions: the effect of the preparation method

“…The intensity ratio of Cu 2+ 2p 3/2 satellite peaks to main peak ( I sat / I pp ) is used to indicate the degree of unsaturation of Cu 2+ , 28,29 I sat / I pp are 0.3 and 0.4 for Cu/CeO 2 -mcc and Cu/CeO 2 -mc, respectively. The lower I sat / I pp for Cu/CeO 2 -mcc also demonstrates the higher degree of the unsaturated state of Cu 2+ , which implies the formation of Cu–Ce solid structure.…”