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제114회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Thiolated graphene oxide-supported Pd-Co alloyed nanoparticles as the high performance electrocatalyst for oxygen reduction reaction

등록일
2014년 8월 28일 14시 00분 26초
접수번호
0930
발표코드
ELEC.P-1226 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 15일 (수요일) 16:00~19:00
발표형식
포스터
발표분야
전기화학
저자 및
공동저자
윤미라, 배시라, 전승원*
전남대학교 화학과, Korea
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.

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