Electrochemical reduction of oxygen on nanoparticulate gold electrodeposited on a molecular template

被引：39

作者：

Mirkhalaf, Fakhradin ^{[1
]}

Tammeveski, Kaido ^{[2
]}

Schiffrin, David J. ^{[1
]}

机构：

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

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

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2009年 / 11卷 / 18期

关键词：

GLASSY-CARBON ELECTRODES; SINGLE-CRYSTAL ELECTRODES; THIOL-COVERED GOLD; HYDROGEN-PEROXIDE; SURFACE-STRUCTURE; IN-SITU; ELECTROCATALYTIC PROPERTIES; PLATINUM NANOPARTICLES; COVALENT MODIFICATION; METAL-DEPOSITION;

D O I：

10.1039/b818439a

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：

The reduction of oxygen on gold electrodeposited on an organic template has been investigated. The template consisted of reduced 4-nitrophenyl groups attached to glassy carbon (GC) by the electrochemical reduction of the corresponding diazonium compound. The electrode modified by this Au nanostructured film shows electrocatalytic properties for the oxygen reduction reaction (ORR) different from those of bulk Au, GC or GC grafted with 4-nitrophenyl groups. The reduced nitrophenyl film inhibits the O-2 reduction reaction. A two-step reduction mechanism with production of hydrogen peroxide in the first step and water in the second was observed in alkaline solutions. The standard heterogeneous rate constants for this two-electron transfer sequential reaction (EE reduction mechanism) have been calculated using non-linear regression analysis (NLR).

引用

页码：3463 / 3471

页数：9

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