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제120회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Facile sonochemical synthesis of PdCu alloy as highly active elctrocatalysts for methanol oxidation reaction

등록일
2017년 8월 14일 13시 05분 29초
접수번호
0331
발표코드
ELEC.P-451 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 20일 (금요일) 13:00~14:30
발표형식
포스터
발표분야
Electrochemistry
저자 및
공동저자
WEN JUAN SHI, Hyun-Uk Park, Ah-Hyeon Park, Jongun Jung, Young-Uk Kwon*
Department of Chemistry, Sungkyunkwan University, Korea
The high performance of Pd-based bimetallic nanocatalysts has the potential to replace Pt-containing catalysts for the direct methanol fuel cells. Conventionally, bimetallic particles are obtained through the annealing of nanoparticles. However, this research demonstrates a simple sonochemical synthesis method to fabricate the palladium-copper alloy (PdCu alloy). Our approaches involve the reduction of Pd and Cu using ethylene glycol as the solvent and reduction agent and Ketjen Black as the carbon support. The crystal structures, alloy compositions and morphologies of catalysts are determined by X-ray diffraction (XRD), energy dispersive spectrometer (EDS) and transmission electron microscopy (TEM), respectively. XRD patterns of samples show the formation of the face-centered cubic crystalline Pd on the carbon support for the PdCu/C catalysts. TEM images show that the PdCu alloy nanoparticles (NPs) are well-dispersed on the carbon support, and the sizes of the nanoparticles can be controlled by adjusting the composition of the raw mixtures. Moreover, EDS results indicate the uniform compositions of Cu and Pd atom. The electrocatalytic properties of PdCu alloys have been investigated by rotating disk electrode (RDE). The PdCu alloy with atomic ratio of 30.8% Cu exhibits a higher electrocatalytic activity and lower onset potential in 0.1 M KOH electrolyte containing 1 M methanol solution.

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