| 초록 |
Single-atom catalysts (SACs), which are atomically dispersed metals on a support surface, have been regarded as a next generation catalyst with exceptional catalytic efficiency. However, the thermodynamic instability of the SACs leads to agglomeration into NPs. Here, we synthesized Au/CeO2-TiO2 hybrid-oxide catalysts using deposition-precipitation method to design reactive and stable Au SACs for low-temperature CO oxidation. The structure of Au/CeO2-TiO2 catalyst was characterized by HRTEM, XRD, and XPS analysis, and the catalytic properties were investigated using the CO oxidation reaction. Anchored Au single atoms at the CeO2-TiO2 interfaces show enhanced activity for low-temperature CO oxidation than Au/TiO2 catalysts. Based on a combinatorial study of DFT calculations and experimental analysis, we suggest a design strategy for highly active Au SACs and provide an insight into the stabilization of Au single atoms under the reaction condition. |
