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Promotional Effect of Palladium on the Hydrogen Oxidation Reaction at a PtPd Alloy Electrode

Authors

  • Sung Jong Yoo,

    1. School of Chemical and Biological Engineering, Seoul National University, Shinlimdong 56-1, Seoul 151-742 (Korea), Fax: (+82) 2 888 1604
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  • Hee-Young Park,

    1. School of Chemical and Biological Engineering, Seoul National University, Shinlimdong 56-1, Seoul 151-742 (Korea), Fax: (+82) 2 888 1604
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  • Tae-Yeol Jeon,

    1. School of Chemical and Biological Engineering, Seoul National University, Shinlimdong 56-1, Seoul 151-742 (Korea), Fax: (+82) 2 888 1604
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  • In-Su Park,

    1. School of Chemical and Biological Engineering, Seoul National University, Shinlimdong 56-1, Seoul 151-742 (Korea), Fax: (+82) 2 888 1604
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  • Yong-Hun Cho,

    1. School of Chemical and Biological Engineering, Seoul National University, Shinlimdong 56-1, Seoul 151-742 (Korea), Fax: (+82) 2 888 1604
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  • Yung-Eun Sung Prof.

    1. School of Chemical and Biological Engineering, Seoul National University, Shinlimdong 56-1, Seoul 151-742 (Korea), Fax: (+82) 2 888 1604
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  • This work was supported in part by KRF (KRF-2006-005J04601), and in part by the Research Center for Energy Conversion and Storage (Contract No. R11-2002-102-00000-0). We are grateful to the Pohang Light Source (PLS) for allowing us to conduct our XAS measurements at their facility.

Abstract

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Eine Vulkankurve beschreibt die Wasserstoffoxidationsreaktion (HOR) in Abhängigkeit vom Pd-Gehalt der PtPd-Elektroden. Die Austauschstromdichte ist bei der Zusammensetzung Pt72Pd28 maximal, und die Ergebnisse weisen darauf hin, dass die Bildung von PdHx-Spezies (Pd mit spontan adsorbiertem Wasserstoffgas; siehe Bild) die elektronische Pt-Struktur günstig für die HOR verändert.

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