| 초록 |
As global warming and atmospheric pollution become more serious problems, harmful and greenhouse gas treatment technologies have been actively pursued. Heterogeneous catalysts to reduce greenhouse gases and air pollutants have received much attention. Reducing the size of metal particles to the atomic level can improve the catalytic performance and use efficiency of precious metals. Furthermore, fine control of the geometric and electronic structures of metal catalysts can maximize activity, selectivity and durability. Here, we design the metal atomic catalysts with 100% dispersion and controlled surface structures upon target reaction. More specifically, dual structure CeO2-Al2O3 support was synthesized, and then metal atoms were immobilized on it. Metal atom arrangement was tuned to the isolated single-atom catalysts (SACs) or neighboring ensemble catalysts (ESCs). Electronic state of metal atomic catalysts was varied from oxidized to metallic state while maintaining the geometric structure. These metal atomic catalysts have superior performance for reactions to reduce harmful and greenhouse gases, so they can be promising candidates for sustainability and carbon neutrality. |
