Electrochemical reduction of oxygen on nanostructured gold electrodes

被引：72

作者：

Sarapuu, Ave ^{[1
]}

Nurmik, Margus ^{[1
]}

Maendar, Hugo ^{[2
]}

Rosental, Arnold ^{[2
]}

Laaksonen, Timo ^{[3
]}

Kontturi, Kyoesti ^{[3
]}

Schiffrin, David J. ^{[4
]}

Tammeveski, Kaido ^{[1
]}

机构：

[1] Univ Tartu, Inst Phys Chem, EE-51014 Tartu, Estonia

[2] Univ Tartu, Inst Phys, EE-51014 Tartu, Estonia

[3] Aalto Univ, Dept Chem Technol, Espoo 02015, Finland

[4] Univ Liverpool, Dept Chem, Liverpool L69 7ZD, Merseyside, England

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2008年 / 612卷 / 01期

关键词：

oxygen reduction; kinetic parameters; Au nanoparticles; electrocatalysis; Nafion;

D O I：

10.1016/j.jelechem.2007.09.016

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The reduction of oxygen has been studied on nanostructured gold electrodes in 0.5 M H2SO4 and 0.1 M KOH using the rotating disk electrode (RDE) technique. Thin films of gold, with a nominal thickness of 0.25-20 nm, were prepared by vacuum evaporation onto glassy carbon (GC) electrodes and coated with a Nafion film. The surface morphology of the Au films was examined by transmission electron microscopy (TEM) and their structure by glancing incidence angle X-ray powder diffraction (GIXRD). Tafel slopes close to -120 mV dec(-1) were obtained for all electrodes in both solutions, indicating that the O-2 reduction mechanism is the same for thin-film as for bulk Au electrodes. The specific O-2 reduction activity (SA) of the nanostructured Au electrodes in 0.5 M H2SO4 was almost constant over the range of Au thicknesses studied. In 0.1 M KOH, the SA slightly decreased with decreasing film thickness. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：78 / 86

页数：9

共 70 条

[1] Fabrication and electrochemical application of three-dimensional gold nanoparticles: Self-assembly [J].