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제106회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Facile Preparation of Carbon Supported Co-Pd Alloy and Core-Shell Nanoparticles by Ultrasound and Their Enhanced Electrocatalytic ORR Activity

등록일
2010년 8월 30일 19시 00분 56초
접수번호
1515
발표코드
Ⅳ-MAT.P-145 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅳ>
발표형식
포스터
발표분야
재료화학
저자 및
공동저자
장지훈, 권영욱
성균관대학교 화학과, Korea
Carbon supported Co-Pd nanocomposites with different surface structure and various ratio of Co/Pd were synthesized by ultrasound assisted polyol process. Sonochemical treatment of palladium acetylacetonate and cobalt acetylacetonate in ethylene glycol in the presence of a carbon support without any other surfactant, reagent for pH adjustment or stabilizer produced 4-7 nm sized CoxPd nanoparticles dispersed on the carbon support. The absence of additional reagents in the sonochemical reaction system makes unsoiled nanoparticles in comparison with conventional wetting methods. The structures of the nanoparticles, pure Pd, Co-Pd alloy and core-shell structures were characterized by XRD and TEM. Electrocatalytic oxygen reduction reaction (ORR) behavior of the materials was measured by rotating disk electrode (RDE) method and compared with pure Pd/C and commercial Pt/C. We obtained a larger mass activity for ORR with Co-Pd mixed phase samples than pure Pd/C and a comparable result with commercial Pt/C. Especially, Co0.25Pd core-shell structure shows a remarkable enhanced activity for ORR.

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