| 초록 |
Understanding the inherent catalytic nature of the interface between metal nanoparticles (NPs) and oxide supports enables the rational design of metal–support interactions for high catalytic performance. However, it is difficult to express the catalytic activity induced by the interfacial site through a simple descriptor. Based on a combinatorial study of density functional theory calculations and catalytic experiments, we focus on two structural design factors of metal NP-supported oxide catalysts. Pt NPs with sizes of 1, 2, and 3 nm were supported on the surface of CeO2-cubic ({100} facet) and -octahedral ({111} facet) nanocrystals. During catalytic CO oxidation, the activity of the Pt/CeO2-cube was higher than that of the Pt/CeO2-octahedron, regardless of the size of the NPs. However, the intrinsic catalytic activity of the Pt-CeO2 interface converges as the size of Pt NPs increases. This study elucidates how the interfaces formed between the shape-controlled CeO2 and the size-controlled Pt NPs affect the resultant catalytic activity. |
