Influence of Ce0.35Zr0.55Y0.10 Solid Solution on Peroformance of Pt-Rh Three-Way Catalysts

Ce0.35Zr0.55Y0.10 solid solution was prepared by co-precipitation technique and characterized by specific surface area measurements (BET) and X-ray diffraction (XRD). Ce0.35Zr0.55Y0.10 was used to prepare low Pt-Rh three-way catalyst (TWC), and its influence on the performance of TWC was investigated. The results revealed that Ce0.35Zr0.55Y0.10 had a cubic structure similar to Ce0.50Zr0.50O2 and its specific surface area can maintain higher than Ce0.50Zr0.50O2 after 1000 °C calcination for 5 h. Being hydrothermal aged at 1000 °C for 5 h, the catalyst containing Ce0.35Zr0.50Y0.10 still exhibited higher conversion of C3H3, CO and NO and lower light-off temperature in comparison with Ce0.50Zr0.50O2 TWC.