121st General Meeting of the KCS

Type Poster Presentation
Area Electrochemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code ELEC.P-576
Subject Investigation of Synergetic Effect of PdFePt Ternary Nanoparticles and Their Electrocatalytic Properties for Oxygen Reduction Reaction
Authors Hyun-Uk Park, Wenjuan Shi, Ah-Hyeon Park, Jong-Un Jung, Young-Uk Kwon*
Department of Chemistry, Sungkyunkwan University, Korea
Abstract In this work, we have studied synergetic effect of PdFePt nanoparticles (NPs) supported on carbon support (PdFePt/C) along with different Pd precursors (Pd(acac)2 and PdO) and investigated their electrocatalytic performance for oxygen reduction reaction (ORR). PdFePt/C_Pd(acac)2 and PdFePt/C_PdO samples showed 4.5 and 2.8 nm sized PdFePt NPs respectively, and were synthesized by a one-step ultrasound-assisted polyol synthesis (UPS). For the preparation of PdFePt/C samples, Pt(acac)2, Fe(acac)3, Pd(acac)2 (or PdO) and carbon support were dispersed in ethylene glycol and irradiated by ultrasound for 3 h. Based on the structural characterization, we found that PdFePt/C_Pd(acac)2 sample have wide particle size distribution because of such big nanoparticles, whereas PdFePt/C_PdO sample show relatively well-dispersed and uniform sized PdFePt NPs on carbon support. It assumed that there might be difference pathway for particle growth during the synthetic process arose from different Pd precursors. Electrocatalytic properties of samples were investigated by rotating disk electrode (RDE) measurement. Compared with commercial Pt/C, PdFePt_Pd(acac)2 and PdFePt/C_PdO samples showed the enhanced ORR activity and durability in acid media. In conclusion, we observed that the synergetic effect of PdFePt ternary electrocatalyst along with types of Pd precursors and it can play a important role in elelectrocatalytic performance and durability.
E-mail phu9355@nate.com