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Electrocatalytic Reduction of Oxygen on a Pd Ad-Layer Modified Au(111) Electrode in Alkaline Solution

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Abstract

Oxygen reduction was studied on palladium, cadmium and zinc ad-atom modified single crystal Au(111) electrodes. The electrodes were modified by underpotential deposition process and their activity towards oxygen reduction was studied in alkaline media by voltammetry. The reduction peaks obtained were compared with those of bare Au(111), Pd disc and bulk deposited Cd electrodes. Enhanced catalytic activity of the Au(111) electrode in the presence of Pd, Cd and Zn ad-layer can be attributed to a change in surface charge and energy by ad-layer formation. In oxygen saturated medium a well defined sharp reduction peak was observed at −0.12 V for 1/5 ML Pd ad atom modified Au(111) electrode while it was positioned at −0.18 V on a Pd disk electrode. The best shift in reduction peak potential was obtained with 2/5 ML Pd ad atom modified Au(111) electrode with similar current density of Pd disc electrode.

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Acknowledgments

The authors wish to thank TUBITAK (Proj. No: 104 M 246), Turkey, for financial support.

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Authors and Affiliations

  1. Science Faculty, Department of Chemistry, Ege University, 35100, Bornova, Izmir, Turkey

    Zekerya Dursun, Şükriye Ulubay, Buket Gelmez & F. Nil Ertaş

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  1. Zekerya Dursun
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  2. Şükriye Ulubay
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  3. Buket Gelmez
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  4. F. Nil Ertaş
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Correspondence to Zekerya Dursun.

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Dursun, Z., Ulubay, Ş., Gelmez, B. et al. Electrocatalytic Reduction of Oxygen on a Pd Ad-Layer Modified Au(111) Electrode in Alkaline Solution. Catal Lett 132, 127–132 (2009). https://doi.org/10.1007/s10562-009-0058-0

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  • DOI: https://doi.org/10.1007/s10562-009-0058-0

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