Electrochemical activity of Sn-modified Pt single crystal electrodes for 
ethanol oxidation

El-Shafei, Alaa A.; Eiswirth, Markus

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Electrochemical activity of Sn-modified Pt single crystal electrodes for ethanol oxidation

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El-Shafei, Alaa A.
Max Planck Society;

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Eiswirth, Markus
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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El-Shafei, A. A., & Eiswirth, M. (2010). Electrochemical activity of Sn-modified Pt single crystal electrodes for ethanol oxidation. Surface science: a journal devoted to the physics and chemistry of interfaces, 604(9-10), 862-867. Retrieved from http://dx.doi.org/10.1016/j.susc.2010.02.012.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0010-F5A5-E

Abstract

Low-index plane Pt single crystal electrodes modified by submonolayer deposition of Sn have been tested for ethanol oxidation in acidic media using cyclic voltammetry and chronoamperometry. The enhancement factor for ethanol oxidation depends on both substrate crystallography and Sn coverage. The optimum coverage was found to be around 0.2, 0.25 and 0.52 for (1 0 0), (1 1 1) and (1 1 0), respectively. The enhancement factor was found to decrease in the order: Sn/Pt (1 1 0) > Sn/Pt (1 0 0) > Sn/Pt (1 1 1). On the other hand, the current density obtained at 0.4 V after 15 min of electrolysis was found to decrease in the order: Sn/Pt (1 1 0) > Sn/Pt (1 1 1) > Sn/Pt (1 0 0).