The sintering of Pd under high temperature operation conditions usually leads to serious deactivation of Pd-based TWCs. As the stronger Pd-CeO₂-ZrO₂(Pd-CZ) interaction in the form of Pd-O-Ce bond favors to anchor Pd species than that of Pd-Al₂O₃, to construct a CeO₂-ZrO₂-Al₂O₃(CZA) support with a relative CZ-rich surface is beneficial to selectively enlarger the Pd-CZ interface to maintain the excellent catalytic function of Pd/CZA TWCs. For the purpose, a facile one step peptizing method has been put forward to achieve the CZA material to stabilize Pd species. By XRD, TEM and Mapping, it could be inferred that comparing with the conventional precipitation method and peptization-precipitation method, the CZ nanoparticles could be homogeneously distributed on the network structure of porous Al₂O₃ by in-situ growth in the peptization method. Then the CZA with a relative CZ-rich surface could be obtained, which interacted strongly with the supported Pd species and thus stabilized the Pd species in oxidation states and smaller particle size. As a result, the Pd/CZA catalyst from peptization method exhibited the best activity for CO, NO, C₃H₆ and C₃H₈, the T₉₀ (complete conversion temperature at 90% conversion) of which was reduced by 40 °C, 50 °C, 40 °C and 20 °C comparing with that of Pd/CZA derived from conventional precipitation method even being thermal aged at 900 ℃/3 h, respectively.

高温操作条件下 Pd 的烧结通常会导致 Pd 基 TWC 严重失活。由于 Pd -O-Ce 键形式的 Pd- CeO ₂ -ZrO _{2 (Pd-CZ) 相互作用比 Pd-Al 2} O ₃更强，有利于锚定 Pd 物质，从而构建了 CeO ₂ -ZrO ₂ -_三氧化_二铝具有相对丰富的CZ表面的(CZA)载体有利于选择性扩大Pd-CZ界面，以保持Pd/CZA TWC优异的催化功能。为此，提出了一种简便的一步胶溶方法来实现 CZA 材料稳定 Pd 物质。通过XRD、TEM和Mapping可以看出，与常规沉淀法和胶溶沉淀法相比，CZ纳米粒子能够均匀分布在多孔Al 2 O 3 的网络_结构上_。通过胶溶方法中的原位生长。然后可以获得具有相对富含CZ的表面的CZA，其与负载的Pd物种强烈相互作用，从而稳定Pd物种的氧化态和较小的粒径。_{结果表明，胶溶法Pd/CZA催化剂对CO、NO、C 3} H ₆和C ₃ H ₈表现出最好的活性，其T ₉₀ (90%转化率时的完全转化温度)降低了40°。与传统沉淀法得到的 Pd/CZA 相比，即使在 900 ℃/3 h 下进行热老化，其温度分别为 C、50 °C、40 °C 和 20 °C。