Park, Hee-Young Park, Jin Hoo Kim, Pil Yoo, Sung Jong 2024-01-19T22:32:20Z 2024-01-19T22:32:20Z 2021-09-03 2018-06-05 0926-3373 https://pubs.kist.re.kr/handle/201004/121264 Carbon-supported hollow PdCu2@Pt core@shell nanoparticles with ordered intermetallic cores were prepared as an efficient and durable oxygen reduction reaction (ORR) electrocatalyst for polymer electrolyte membrane fuel cells (PEMFCs). PdCu2 cores prepared using a chemical reduction method were thermally treated to produce ordered intermetallic structures. A Pt shell was then deposited via a galvanic displacement process. The effect of the galvanic displacement conditions on the properties and structure of the obtained core shell nanoparticles was investigated by varying the solution pH and anion concentration. Acidic conditions and low Cl- concentrations were found to provide a uniform Pt layer with a hollow core, while maintaining the ordered intermetallic core structure. These hollow PdCu2@Pt core@shell nanoparticles showed high activity and stability for ORR electrocatalysis in PEMFCs. English ELSEVIER SCIENCE BV PLATINUM-MONOLAYER ELECTROCATALYSTS FUEL-CELLS ALLOYS STABILITY SURFACES COPPER Hollow PdCu2@Pt core@shell nanoparticles with ordered intermetallic cores as efficient and durable oxygen reduction reaction electrocatalysts Article 10.1016/j.apcatb.2017.11.052 1 APPLIED CATALYSIS B-ENVIRONMENTAL, v.225, pp.84 - 90 APPLIED CATALYSIS B-ENVIRONMENTAL 225 84 90 scie scopus 000424719300008 2-s2.0-85034865805 Chemistry, Physical Engineering, Environmental Engineering, Chemical Chemistry Engineering Article PLATINUM-MONOLAYER ELECTROCATALYSTS FUEL-CELLS ALLOYS STABILITY SURFACES COPPER Polymer electrolyte membrane fuel cell Oxygen reduction reaction Hollow nanoparticles PdCu2@Pt core@shell Ordered intermetallic core