We synthesized a series of CeO₂ with controllable morphologies including nanocube (NC), nanorod (NR), and nanopolyhedron (NP), enclosed by different facets, and then explored the support morphology effect on catalytic properties of Au₁Pt₃ catalysts in glycerol oxidation. As expected, the series of Au₁Pt₃/CeO₂ catalysts exhibit a conspicuous support facet-dependent catalytic performance especially for the catalytic activity. Specifically, the TOF ranks in the order that Au₁Pt₃/NC (937.8 h⁻¹) > Au₁Pt₃/NR (713.1 h⁻¹) > Au₁Pt₃/NP (491.7 h⁻¹). Among three catalysts, Au₁Pt₃/NC exhibits the most notable interaction strength due to the highest oxidizing capability of Ce_6c–O_2c sites on NC (1 0 0), confirmed by in situ CO FT-IR. In this case, Pt⁰ species are more easily oxidized to Pt²⁺. The strong metal–support interaction promotes the activation ability of oxygen, resulting in the generation of more reactive oxygen species including O₂⁻, O₂²⁻, and O⁻, among which O₂⁻ is proved to be the most favorable species.

我们合成了一系列具有可控形态的CeO ₂，包括被不同面包围的纳米立方体（NC），纳米棒（NR）和纳米多面体（NP），然后研究了载体形态对Au ₁ Pt ₃催化剂在甘油中催化性能的影响。氧化。如所期望的，Au ₁ Pt ₃ / CeO _2系列催化剂表现出明显的依赖于载体方面的催化性能，特别是对于催化活性。具体地，TOF以Au ₁ Pt ₃ / NC（937.8 h ^-1）> Au ₁ Pt ₃ / NR（713.1 h ^-1）> Au的顺序排列。₁ Pt ₃ / NP（491.7 h ^-1）。在三种催化剂中，Au ₁ Pt ₃ / NC由于在NC（1 0 0）上Ce _6c -O _2c位的最高氧化能力而表现出最显着的相互作用强度，这是通过原位CO FT-IR证实的。在这种情况下，Pt ⁰物种更容易被氧化为Pt ²⁺。强的金属-载体相互作用促进氧的活化能力，导致更多的活性氧物质，包括的O的生成₂ ^-，O- ₂ ^2-，和O ^- ，其中ö ₂ ^- 被证明是最有利的物种。