| 摘要 |
This invention discloses an automotive exhaust gas treatment catalyst composed of one or more noble metals dispersed on CeO2-RE2O3 carrier particles, where RE represents a rare earth metal. The ceria-rare earth oxide carrier for the noble metal facilitates the simultaneous oxidation of carbon monoxide, CO, and the decomposition of nitric oxide, NO. The catalyst is particularly useful when the air-fuel mixture to the automobile engine is continually cycled between fuel-rich and fuel-lean ratios compared to the stoichiometric air-fuel ratio. |
