Enhanced properties of solid solution (CeZr)O2 modified with metal oxides for catalytic oxidation of low-concentration methane

The solid solution (CeZr)O2 catalyst was synthesized, and it was modified with metal oxides by incipient impregnation. Morphology and structure were characterized by X-ray diffraction, transmission electron microscope, nitrogen ad/desorption and H2-temperature program reduction techniques. The catalytic properties of methane oxidation were also investigated. The results showed that solid solution possessed a mesoporous structure and exhibited excellent catalytic performance. The activity of solid solution was improved effectively by nickel doping, and the optimal loading is 15 wt%. The stability of (CeZr)O2 and modified (CeZr)O2 indicated that the structure of pristine solid solution played a key role in promoting molecules diffusion and spatial confining oxide particle sintering.