Lee, Kug-Seung Park, Hee-Young Chung, Young-Hoon Yoo, Sung Jong Nam, Suk Woo Ahn, Docheon Sung, Nark-Eon Jang, Jong Hyun 2024-01-20T06:03:43Z 2024-01-20T06:03:43Z 2021-09-05 2015-09-20 0378-7753 https://pubs.kist.re.kr/handle/201004/125010 For carbon-supported Pt-enriched Pt3Au nanoparticles (Pt3Au/C), the effect of oleylamine (OA) concentration during nanoparticle synthesis is investigated. When the OA concentration is increased from 0.12 mM to 1.2 mM, the particle size of Pt3Au gradually decreased from 5.1 nm to 3.3 nm, whereas the crystal structure and surface Pt concentration are not significantly influenced. With higher OA concentration, the oxygen reduction reaction activity of the Pt3Au/C is largely enhanced, which can be explained by the combined effect of increased specific activity and electrochemical surface area of Pt. It is experimentally confirmed using a bulk CO-oxidation technique that smaller particle size (larger OA concentration) leads to decreased OH adsorption strength, which originates from the double layer overlapping effect of closely adjacent nanoparticles. (C) 2015 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV ALLOY NANOPARTICLE CATALYSTS DENSITY-FUNCTIONAL THEORY FUEL-CELL CATALYSTS PLATINUM NANOPARTICLES ELECTRONIC-STRUCTURE PARTICLE PROXIMITY METAL-SURFACES LASER-ABLATION FORMIC-ACID SIZE Effect of oleylamine concentration on the structure and oxygen reduction activity of carbon-supported surface-Pt-enriched Pt3Au electrocatalysts Article 10.1016/j.jpowsour.2015.04.165 1 JOURNAL OF POWER SOURCES, v.290, pp.130 - 135 JOURNAL OF POWER SOURCES 290 130 135 scie scopus 000356550900015 2-s2.0-84928940250 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article ALLOY NANOPARTICLE CATALYSTS DENSITY-FUNCTIONAL THEORY FUEL-CELL CATALYSTS PLATINUM NANOPARTICLES ELECTRONIC-STRUCTURE PARTICLE PROXIMITY METAL-SURFACES LASER-ABLATION FORMIC-ACID SIZE Pt3Au nanoparticle electrocatalyst Surfactant concentration Oxygen reduction reaction Bulk CO oxidation OH adsorption