Chung, Young-Hoon Chung, Dong Young Jung, Namgee Park, Hee Young Yoo, Sung Jong Jang, Jong Hyun Sung, Yung-Eun 2024-01-20T09:34:50Z 2024-01-20T09:34:50Z 2021-09-05 2014-05-15 1932-7447 https://pubs.kist.re.kr/handle/201004/126783 The thermal annealing process is a common treatment used after the preparation step to enhance the electrocatalytic properties of the oxygen reduction reaction (ORR). The structure of a Pt-based bimetallic nanoparticle, which is significantly affected by the catalytic properties, is reconstructed by thermal energy. We investigated the effect of structural reconstruction induced by thermal annealing on the improvement of the ORR using various physical and electrochemical methods. We found that the structural evolution of PtNi nanoparticles, i.e., the Pt-Ni ordering with the Pt shell and the surface reorientation into the (111) facet, is the source of the enhanced ORR activity as well as electrochemical stability through the thermal annealing. This result confirms the crucial factors for the ORR properties by the thermal annealing process and proposes a way to design advanced electrocatalysts. English American Chemical Society OXYGEN REDUCTION PT-SKIN CATALYTIC-ACTIVITY CORE-LEVEL PLATINUM ADSORPTION ALLOYS STABILITY DOMAINS METALS Origin of the Enhanced Electrocatalysis for Thermally Controlled Nanostructure of Bimetallic Nanoparticles Article 10.1021/jp5019982 1 The Journal of Physical Chemistry C, v.118, no.19, pp.9939 - 9945 The Journal of Physical Chemistry C 118 19 9939 9945 scie scopus 000336198900009 2-s2.0-84900797861 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article OXYGEN REDUCTION PT-SKIN CATALYTIC-ACTIVITY CORE-LEVEL PLATINUM ADSORPTION ALLOYS STABILITY DOMAINS METALS