Lim, Ji-Eun Lee, Uk Jae Ahn, Sang Hyun Cho, Eunae Kim, Hyoung-Juhn Jang, Jong Hyun Son, Hyungbin Kim, Soo-Kil 2024-01-20T07:30:34Z 2024-01-20T07:30:34Z 2022-01-25 2015-04 0926-3373 https://pubs.kist.re.kr/handle/201004/125573 We have investigated phosphate adsorption on the Au surface by in situ electrochemical surface-enhanced Raman spectroscopy to assess the possible use of Au-based alloys as catalysts for the oxygen reduction reaction (ORR) in high-temperature proton exchange membrane fuel cells. Compared with its strong adsorption in neutral or basic electrolytes, the adsorption of phosphate species on the Au surface were significantly altered in acidic electrolyte. Thus, PtxAu100-x catalysts of various compositions were prepared by electrodeposition and exhibited better ORR activities than pure Pt in phosphoric acid electrolyte, which can be explained in terms of alloying effects and the different phosphate adsorption behavior. (C) 2014 Elsevier B.V. All rights reserved. English ELSEVIER Oxygen reduction reaction on electrodeposited PtAu alloy catalysts in the presence of phosphoric acid Article 10.1016/j.apcatb.2014.10.042 1 APPLIED CATALYSIS B-ENVIRONMENTAL, v.165, pp.495 - 502 APPLIED CATALYSIS B-ENVIRONMENTAL 165 495 502 N scie scopus 000347584200054 2-s2.0-84911157696 Chemistry, Physical Engineering, Environmental Engineering, Chemical Chemistry Engineering Article HIGH-TEMPERATURE FUEL-CELL ALUMINUM PHOSPHATE FORMIC-ACID GOLD ADSORPTION PLATINUM ELECTROCATALYSTS NANOPARTICLES CHALLENGES Phosphate adsorption Electrochemical surface-enhanced Raman spectroscopy Platinum-gold alloy catalyst Oxygen reduction reaction