2025.6.19 The paper “Dynamic interfacial structure of au/CeO2 catalyst upon thermal activation” published on Journal of Colloid and Interface Science (collaboration with Prof. Langli Luo at TJU) - 课题组新闻

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2025.6.19 The paper “Dynamic interfacial structure of au/CeO2 catalyst upon thermal activation” published on Journal of Colloid and Interface Science (collaboration with Prof. Langli Luo at TJU)

发布时间：2025-06-19

The dynamic behavior of oxide-supported metal catalyst interfaces under thermal and gaseous activation critically determines their catalytic performance. Using in situ TEM, we reveal the atomic-scale evolution of Au nanoparticles on CeO2 supports during thermal treatment. The Au/CeO2 interface structure depends on three key factors: epitaxial matching, nanoparticle morphology, and metal-support interactions, all governed by the balance between Au surface energy, cohesive energy, and interfacial energy with CeO2. Thermal activation induces significant structural reorganization in Au nanoparticles, exhibiting size- and support-dependent facet reorientation that follows temperature-driven wetting and sintering trends. These transformations are facilitated by crystalline defects (e.g., twin boundaries and dislocations) that reduce the energy barrier for atomic rearrangement.