화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.27, No.6, 1689-1694, November, 2010
DOI10.1007/s11814-010-0292-6  Export Citation
Enhancement of oxygen reduction activity by sequential impregnation of Pt and Pd on carbon support
Dohwa Jung1, Sangchul Beak1, Kee Suk Nahm1, 2, and Pil Kim1, 2, †
  • 1Department of Hydrogen and Fuel Cell Engineering, Specialized Graduate School, Chonbuk National University, Jeonju 561-756, Korea
  • 2School of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju 561-756, Korea
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Two Pd-based PtPd bimetallic catalysts (mole ratio of Pt to Pd=1 : 18) were prepared by co-impregnation (Pt-Pd/C) and sequential impregnation of Pt on Pd/C [Pt(Pd/C)] for the application to oxygen reduction reaction (ORR). The prepared bimetallic catalysts had lower ORR activities than Pt/C, while they showed largely enhanced activity compared to Pd/C. In particular, the extent of enhancement was found to be dependent on the surface composition. The observed mass and specific activities of Pt(Pd/C) were more than two times higher than those of Pt-Pd/ C. The superior activity of Pt(Pd/C) observed from the performed studies was attributed to its Pt-rich surface.
Keywords:Oxygen Reduction Reaction (ORR);Pd Catalyst;Pt Catalyst;Bimetallic Catalyst;Polymer Electrolyte Fuel Cells (PEMFCs)
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