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114th General Meeting of Korean Chemical Society Thiolated graphene oxide-supported Pd-Co alloyed nanoparticles as the high performance electrocatalyst for oxygen reduction reaction

Submission Date :
8 / 28 / 2014 , 14 : 00 : 26
Abstract Number :
114082809308
Presenting Type:
Poster Presentation
Presenting Area :
전기화학
Authors :
윤미라, 배시라, 전승원*
전남대학교 화학과, Korea
Assigned Code :
ELEC.P-1226 Assigend Code Guideline
Presenting Time :
10월 15일 (수요일) 16:00~19:00
Thiolated graphene oxide-supported Pd-Co alloyed nanoparticles (abbreviated as Pd-Co/tGO) with efficient electrocatalytic activity for the oxygen reduction reaction (ORR) were synthesized by a chemical reduction method in the presence of polyethylene glycol (PEG) as a stabilizing agent. The catalytic activity of the Pd-Co/tGO composite was significantly enhanced by electrochemical reduction at a potential range of 0 to -1.5 V in the pH 5 phosphate buffered saline (PBS) solution. The electrochemically reduced Pd-Co/tGO (ER/Pd-Co/tGO) was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). Electrocatalytic activities were verified by cyclic voltammetry (CV) and hydrodynamic voltammetry techniques. The ER/Pd-Co/tGO shows a higher electrocatalytic activity for the ORR than that of non-thiolated graphene compound, ER/Pd-Co/rGO. The Koutecky-Levich equation and plots confirm that oxygen reduction in the presence of the ER/Pd-Co/tGO catalyst follows a four electron transfer reaction.