Atomic and nanocluster Ce species on graphene oxides for selective catalytic reduction of NO with NH3

摘要

In this work, a catalyst of graphene oxide supported CeO2 (referred to as CeO2/GO) is prepared and characterized by TEM, H-2-TPR, NH3-TPD and XPS. The catalytic tests show a NO conversion of 97% at a range of 225 degrees C to 325 degrees C with a good stability and water resistance. The microscopic studies display atomic and nanocluster scale distributions of Ce species on large specific surface areas of GO. The structural and surface analyses demonstrate high ratio of Ce3+ and chemisorbed oxygen on surface due to the strong interaction between ceria and GO are beneficial to NH3-SCR.