Jeon, Tae-Yeol Pinna, Nicola Yoo, Sung Jong Yu, Seung-Ho Kim, Sang-Kyung Lim, Seongyop Peck, Donghyun Jung, Doo-Hwan Sung, Yung-Eun 2024-01-20T16:01:58Z 2024-01-20T16:01:58Z 2021-09-04 2011-11-01 1572-6657 https://pubs.kist.re.kr/handle/201004/129813 Carbon-supported Pt nanoparticles with various loading of Pt are prepared by a novel seed-mediated growth method using hydroquinone (HQ) assisted selective deposition. The structural and morphological dependence of the Pt nanoparticles on the catalytic activity in oxygen reduction reaction (ORR) is investigated. The analysis of core-level X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) cannot elucidate the origin of the large enhancement of the ORR activity. In contrast, electrochemical measurements of the CO-displacement charge and the concomitant CO adlayer oxidation behavior prove that the selective deposition of additional Pt contributed to the decrease of surface defects and to the increase of the onset potential for OH adsorption. (C) 2011 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE SA SINGLE-CRYSTAL SURFACES ZERO TOTAL CHARGE BIMETALLIC COLLOIDS STEPPED SURFACES PLATINUM NANOPARTICLES CATALYSIS PT(111) CO QUINONES Enhanced activity of Pt-based electrocatalysts for oxygen reduction via a selective Pt deposition process Article 10.1016/j.jelechem.2011.03.023 1 JOURNAL OF ELECTROANALYTICAL CHEMISTRY, v.662, no.1, pp.70 - 79 JOURNAL OF ELECTROANALYTICAL CHEMISTRY 662 1 70 79 scie scopus 000297888200011 2-s2.0-80055084398 Chemistry, Analytical Electrochemistry Chemistry Electrochemistry Article SINGLE-CRYSTAL SURFACES ZERO TOTAL CHARGE BIMETALLIC COLLOIDS STEPPED SURFACES PLATINUM NANOPARTICLES CATALYSIS PT(111) CO QUINONES Pt nanoparticle Oxygen reduction reaction Surface defect Electrocatalyst