Electrocatalytic oxidation of CO on Ru(0001) surfaces: The influence of surface disorder

被引：21

作者：

Lee, J ^{[1
]}

Wang, WB ^{[1
]}

Zei, MS ^{[1
]}

Ertl, G ^{[1
]}

机构：

[1] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2002年 / 4卷 / 08期

关键词：

D O I：

10.1039/b109547a

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：

Smooth and rough (created by argon ion sputtering) Ru(0001) surfaces were structurally characterized by rerlection high energy electron diffraction (RHEED), and their activity in electrooxidation of CO in 0.1 M HClO4 solution was probed by cyclic voltammetry (CV). While the peak potentials of CO-oxidation on the smooth surface varied with the CO, OH-adsorbate composition (which changed in subsequent scans), these were markedly (similar to0.3 V) lower with the rough surface. This difference is attributed to the varying properties of the Ru-O bond whose activation is considered to be rate-limiting. The enhanced activity of the rough surface is also reflected by the fact that the entire amount of adsorbed CO becomes completely oxidized during the first anodic scan, while with the at surface at least three cycles are required.

引用

页码：1393 / 1397

页数：5

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