As the oxygen redox ability shows great effects on the catalytic performances of ceria-zirconia based materials, many strategies have been utilized to improve the oxygen storage capacity. Here in this study, we report a simple and facile approach to prepare a SO₄^2–-modified La, Y-doped ceria-zirconia material (SO/CZLY-f) with high oxygen storage capacity. Due to the additional redox process between SO₄²⁻ and S²⁻, oxygen storage capacity of SO/CZLY-f (745.3 μmol O₂/g) is about 1.6 times higher than that of La, Y-doped ceria-zirconia material without SO₄^2– modification. Moreover, the catalytic activities and stability of the corresponding Pd-only three-way catalyst were measured. Compared to that of Pd@CZLY-f, the operation window of CO, full conversion temperature of HC and NO over Pd@SO/CZLY-f are obviously widened and lowered, respectively. After aging treatment at 1100 °C for 4 h, the superiority of aged Pd-loading composite is still maintained.

由于氧的氧化还原能力对氧化铈-氧化锆基材料的催化性能有很大影响，因此人们采用了许多策略来提高储氧能力。在本研究中，我们报告了一种简单易行的方法来制备具有高储氧能力的 SO ₄ ^2-改性 La、Y 掺杂二氧化锆-氧化锆材料 (SO/CZLY-f)。由于SO ₄ ^2-和S ^2-之间存在额外的氧化还原过程，SO/CZLY-f (745.3 μmol O ₂ /g) 的储氧能力是La、Y掺杂二氧化锆材料的约1.6倍无 SO ₄ ^2–修改。此外，测量了相应的仅 Pd 三元催化剂的催化活性和稳定性。与Pd@CZLY-f相比，Pd@SO/CZLY-f上CO的操作窗口、HC和NO的完全转化温度分别明显变宽和降低。经1100℃时效处理4 h后，仍保持时效载钯复合材料的优越性。