Abstract
Ce0.35Zr0.65−xRExO2 (RE = Y and La; x = 0 and 0.10) and Ce0.35Zr0.50Y0.075La0.075O2 were prepared by a coprecipitation method. The textures, structures, oxygen storage capacity (OSC), and redox properties of all samples were investigated using Brunauer–Emmett–Teller surface area characterization, x-ray diffraction (XRD), Raman spectra, temperature-programmed technique, and oxygen pulse reaction. The results showed that the fresh Ce0.35Zr0.65O2 has cubic phase, 434 μmol/g of OSC, 82 m2/g of surface area, and good redox properties; after aging at 1000 °C, Ce0.35Zr0.65O2 still has cubic phase, 418 μmol/g of OSC, and 50 m2/g of surface area; when Y3+ or La3+ is added to CeO2–ZrO2, the aged Ce0.35Zr0.65−xRExO2 (RE = Y and La; x = 0 and 0.10) still remains cubic phase, high OSC, and large surface area (47 m2/g); when Y3+ and La3+ are simultaneously added into CeO2–ZrO2, a stable solid solution with cubic phase is formed and has 459 μmol/g of OSC; and the aged Ce0.35Zr0.50Y0.075La0.075O2 reaches to 60 m2/g of surface area and has 390 μmol/g of OSC.
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Acknowledgments
This project is financially supported by the National Nature Science Youth Fund of China (Grant No. 21173153). We would like to thank Professor Zhu, College of Materials Science and Engineering, Sichuan University for XRD measurements, and Dr. Wu, Analytical and Testing Center, Sichuan University for Raman spectra characterization.
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Guo, J., Shi, Z., Wu, D. et al. A comparative study of Y3+- or/and La3+-doped CeO2–ZrO2-based solid solution. Journal of Materials Research 28, 887–896 (2013). https://doi.org/10.1557/jmr.2012.435
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DOI: https://doi.org/10.1557/jmr.2012.435