CeO₂–ZrO₂ mixed oxides with controlled morphologies (i.e., nanorod, nano-polyhedral and disordered shape) were synthesized through either hydrothermal or coprecipitation method, and the corresponding supported Pd/CeO₂–ZrO₂ catalysts were also prepared by conventional impregnation. The obtained catalysts were subjected to systematic structural/physio-chemical characterizations as well as three-way catalytic performance evaluations. The results showed that CeO₂–ZrO₂ mixed oxides presented different exposed crystal planes: namely disordered CZ-di mainly exposed (111) crystal planes, nanorod CZ-ro mainly exposed (111) crystal planes and few (100) crystal planes, while nano-polyhedral CZ-po exposed both (111) and (100) crystal planes. Clear structure-activity relationship could be demonstrated between the TWC (Three-way catalysts) performance of Pd/CeO₂–ZrO₂ and such different microstructures, as (100) and (111) crystal planes exposed by CZ-ro and CZ-po were beneficial for the surface oxygen vacancies formation, thus increasing the Pd-support interaction and effectively decreasing the light-off temperature of HC and NO elimination. On the other hand, the disordered CZ-di retained more lattice oxygen content, leading to better catalytic activity of CO elimination for the corresponding Pd/CZ-di catalyst.

通过水热法或共沉淀法合成了具有可控形貌（即纳米棒、纳米多面体和无序形状）的CeO ₂ –ZrO ₂混合氧化物，并通过常规浸渍法制备了相应的负载型Pd/CeO ₂ –ZrO ₂催化剂。对所得催化剂进行系统的结构/理化表征以及三元催化性能评估。结果表明，CeO ₂ –ZrO ₂混合氧化物呈现不同的暴露晶面：即无序CZ-di主要暴露（111）晶面，纳米棒CZ-ro主要暴露（111）晶面和少量（100）晶面，而纳米多面体CZ-po暴露两者（ 111) 和 (100) 晶面。Pd/CeO ₂ –ZrO ₂的 TWC（三元催化剂）性能之间可以证明明确的构效关系CZ-ro和CZ-po暴露出的（100）和（111）晶面等不同的微观结构有利于表面氧空位的形成，从而增加Pd-载体相互作用并有效降低HC的起燃温度并且没有消除。另一方面，无序的CZ-di保留了更多的晶格氧含量，导致相应的Pd/CZ-di催化剂具有更好的CO消除催化活性。