| 초록 |
In perovskites, exsolution of transition metals has been attracted attention as a technique for smart catalyst design on the energy applications due to its superior features. The exsolution produces electro-catalytic nanoparticles evenly and the exsolved nanoparticles are socketed on the perovskite oxide surface, which can prevent carbon coking and increase redox stability. When a dopant is present in the perovskite, the exsolution of the dopant is often affected by the amount of oxygen vacancies. However, the mechanism for co-segregation of dopant with oxygen vacancies is still unclear. Here, we report exsolution characteristics for B-site transition metals on a redox stable layered perovskite oxide. The uniqueness of the exsolution of each transition metal is confirmed by density functional theory (DFT) calculations and transmission electron microscopy (TEM) analysis. |
