| 초록 |
In Pt-transition metal (TM) alloy catalysts, the electron transfer from TM to Pt is retarded owing to the inevitable oxidation of the TM surface by oxygen. In addition, the surface TM oxide dissolution is accelerated in acidic electrolytes such as those employed in fuel cells, leading to catalyst degradation. Herein, we propose a novel synthesis strategy that selectively modifies the electronic structure of surface Co atoms with N-containing polymers, resulting in highly active and durable PtCo nanoparticle catalysts useful for oxygen reduction reaction (ORR). The proposed organic-inorganic hybrid concept will provide new insights into the tuning of nanomaterials consisting of heterogeneous metallic elements, for various electrochemical and chemical applications |
