Enhancement of oxygen reduction activity by sequential impregnation of Pt and Pd on carbon support

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 th...

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Published inThe Korean journal of chemical engineering Vol. 27; no. 6; pp. 1689 - 1694
Main Authors Jung, Dohwa, Beak, Sangchul, Nahm, Kee Suk, Kim, Pil
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.11.2010
한국화학공학회
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ISSN0256-1115
1975-7220
DOI10.1007/s11814-010-0292-6

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Summary: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.
Bibliography:G704-000406.2010.27.6.011
http://www.cheric.org/article/841842
ISSN:0256-1115
1975-7220
DOI:10.1007/s11814-010-0292-6