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Received October 15, 2009
Accepted March 9, 2010
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Enhancement of oxygen reduction activity by sequential impregnation of Pt and Pd on carbon support
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
kimpill@chonbuk.ac.kr
Korean Journal of Chemical Engineering, November 2010, 27(6), 1689-1694(6), 10.1007/s11814-010-0292-6
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Abstract
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/_x000D_
C. The superior activity of Pt(Pd/C) observed from the performed studies was attributed to its Pt-rich surface.
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References
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