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

被引：28
作者：
El-Shafei, A. A. [1 ]
Eiswirth, M. [1 ]
机构：
[1] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany
来源：
SURFACE SCIENCE | 2010年 / 604卷 / 9-10期
关键词：
Pt single crystal; Ethanol oxidation; Modified electrode; Sn; Forced deposition; METHANOL OXIDATION; ADSORPTION BEHAVIOR; PLATINUM SURFACES; STEPPED SURFACES; PT-RU; ELECTROOXIDATION; PT(111); CATALYSTS; PTSN/C; TIN;
D O I：
10.1016/j.susc.2010.02.012
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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). (C) 2010 Elsevier By. All rights reserved.
引用
收藏
页码：862 / 867
页数：6
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