| 초록 |
Successful development of active and durable fuel-cell catalysts may be attainable from both fundamental and practical insights into the relationship between physical and catalytic properties of the constituent materials. Pt-based bimetallic catalysts have received much attention in the last several decades. In particular, it has been reported that Pt skin Pt-M (M = Fe, Co, Ni, Cu), which can be achieved through chemical and electrochemical routes, has a higher thermodynamic stability by obtaining an increased dissolution potential relative to that of the bimetallic surface. However, fuel-cell catalysts still have critical issues like unstable catalyst structure and therefore, need to be further developed by realizing theoretical understanding in practical fuel-cell catalysts. Conceptual understanding of the electronic and geometric effects on the catalytic properties will be introduced, and then, our recent studies on the alloy nanocatalysts will be also presented. |
