Yoo, Sung Jong Lee, Kug-Seung Hwang, Seung Jun Cho, Yong-Hun Kim, Soo-Kil Yun, Jeong Woo Sung, Yung-Eun Lim, Tae-Hoon 2024-01-20T14:34:28Z 2024-01-20T14:34:28Z 2021-09-04 2012-06 0360-3199 https://pubs.kist.re.kr/handle/201004/129231 We report here that significant electrocatalysis occurs during oxygen reduction reaction (ORR) at the Pt3Y alloy thin film electrodes. In addition, we synthesized Pt3Y alloy nanocatalysts for use in proton exchange membrane fuel cells, fabricated by using a high pressure sputtering technique in a gaseous mixture of Ar and He. Rather than the dense film deposited by conventional sputtering techniques, the resulting structure was comprised of a Pt-3 Y alloy nanocatalyst layer with an average particle size of 10-12 nm. The Pt3Y alloy nanocatalysts were characterized by scanning electron microscopy, transmission electron microscopy, high-resolution X-ray photoelectron spectroscopy, and X-ray absorption near edge spectroscopy. The cell performance of the membrane electrode assembly with multiple layers of sputter-deposited Pt3Y alloy nanoparticles and spray-deposited Nafion- carbon-ink improved dramatically compared to that obtained with the Pt only nanoparticles. The high performance of Pt3Y alloy nanocatalysts fabricated at a sputtering pressure of 200 mTorr (Ar/He = 1) was due to miniaturization of the Pt3Y alloy particles, formation of the porous catalyst layer, and enhancement of the kinetic activity for ORR. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD ALLOYS ELECTROREDUCTION PERFORMANCE CATALYSTS PLATINUM METAL Pt3Y electrocatalyst for oxygen reduction reaction in proton exchange membrane fuel cells Article 10.1016/j.ijhydene.2012.03.089 1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.37, no.12, pp.9758 - 9765 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 37 12 9758 9765 scie scopus 000305106300033 2-s2.0-84861185399 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article ALLOYS ELECTROREDUCTION PERFORMANCE CATALYSTS PLATINUM METAL PtY alloy Sputtering technique Proton exchange membrane fuel cells Utilization of catalysts Multilayer MEA