Sohn, Yeonsun Jung, Namgee Lee, Myeong Jae Lee, Soohyung Nahm, Kee Suk Kim, Pil Yoo, Sung Jong 2024-01-19T19:01:26Z 2024-01-19T19:01:26Z 2021-09-04 2019-11 1226-086X https://pubs.kist.re.kr/handle/201004/119402 Designing a Pt-based catalyst with high oxygen reduction reaction (ORR) performance is very important for the improvement of the economic feasibility of polymer electrolyte fuel cells. Herein, we suggest a method to prepare a Pt-based core-shell catalyst with high ORR activity and durability by galvanic displacement between Cu on a thermally annealed sample of (PtxAuy)(1)Cu-5/C-HT and Pt ions. The resultant catalysts ((PtxAuy)(1)Cu-5@Pt/C) showed a porous core-shell structure with a Pt-enriched surface. The composition of (PtxAuy)(1)Cu-5/C-HT influenced the physical properties of the resultant (PtxAuy)(1)Cu-5@Pt/C catalysts. (PtxAuy)(1)Cu-5@Pt/C catalysts exhibited better ORR performance than a commercial Pt/C one and their performance varied with the composition. Among the catalysts examined, (Pt1Au0.1)@Pt/C showed the best ORR activity. Specifically, it delivered a mass and specific activity of 0.660 mA/mg(PGM) cm(2) and 1506.2 mA/cm(pt)(2) at 0.9 V (vs. RHE), respectively. These are 2.7 and 4.2 times higher than corresponding values obtained for Pt/C. In an accelerated degradation test, addition of Au proved beneficial for the design of a highly durable catalyst. The effect of the Au content on the physical properties and ORR performance of catalysts was interpreted in detail. (C) 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved. English 한국공업화학회 Preparation of porous PtAuCu@Pt core-shell catalyst for application to oxygen reduction Article 10.1016/j.jiec.2019.06.039 1 Journal of Industrial and Engineering Chemistry, v.79, pp.210 - 216 Journal of Industrial and Engineering Chemistry 79 210 216 N scie scopus kci ART002523664 000488135500022 2-s2.0-85068561624 Chemistry, Multidisciplinary Engineering, Chemical Chemistry Engineering Article GALVANIC REPLACEMENT CU ALLOYS ELECTROCATALYSTS NANOPARTICLES CARBON PERFORMANCE NI STABILIZATION PROGRESS CATHODE Pt-based catalyst Oxygen reduction reaction Galvanic displacement Core-shell Fuel cells