Yoo, Sung Jong Sung, Yung-Eun 2024-01-20T08:02:40Z 2024-01-20T08:02:40Z 2021-09-05 2015-01 0039-6028 https://pubs.kist.re.kr/handle/201004/125931 Although alloying with late transition metals such as Ni, Co, and Fe significantly enhances the oxygen reduction reaction (ORR) activity, stability issues have inhibited further performance improvements of fuel cells. Acidic media (pH < 1) at high electrochemical potential (>0.7 V-RHE) induced metal dissolution and also affected the catalytic activity. In terms of the stability issues of alloy nanoparticles, we focused on the early-transition-metal alloy system (Pt-La) as a promising candidate to realize both high activity and stability. The high activity and stability were attributed to electronic perturbations, which were the changes in the filling of the d band and the heat of alloy formation, as confirmed by experimental results. (C) 2014 Elsevier B.V. All rights reserved. English ELSEVIER DENSITY-FUNCTIONAL THEORY SURFACE ALLOYS PLATINUM CATALYST METAL DISSOLUTION TRANSITION PALLADIUM TRENDS SKIN Nanosized Pt-La alloy electrocatalysts with high activity and stability for the oxygen reduction reaction Article 10.1016/j.susc.2014.07.032 1 SURFACE SCIENCE, v.631, pp.272 - 277 SURFACE SCIENCE 631 272 277 scie scopus 000347266000037 2-s2.0-84912098584 Chemistry, Physical Physics, Condensed Matter Chemistry Physics Article DENSITY-FUNCTIONAL THEORY SURFACE ALLOYS PLATINUM CATALYST METAL DISSOLUTION TRANSITION PALLADIUM TRENDS SKIN Pt-La alloy Polymer electrolyte membrane fuel cells Oxygen reduction reactions Stability Early transition metal