Nanocomposite films containing Au nanoparticles formed by electrochemical reduction of metal ions in the multilayer films as electrocatalyst for dioxygen reduction

被引：39

作者：

Huang, MH ^{[1
]}

Shen, Y ^{[1
]}

Cheng, WL ^{[1
]}

Shao, Y ^{[1
]}

Sun, XP ^{[1
]}

Liu, BF ^{[1
]}

Dong, SJ ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Peoples R China

来源：

ANALYTICA CHIMICA ACTA | 2005年 / 535卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

Au nanoparticles; electrochemical reduction; layer-by-layer; catalysis; dioxygen reduction; cobalt porphyrin;

D O I：

10.1016/j.aca.2004.12.006

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Through electrostatic layer-by-layer assembly, AuCl4(-) anions and [tetrakis(N-methylpyridyl)porphyrinato] cobalt (CoTMPyP) cations were alternately deposited on indium tin oxide (ITO) substrates, and 4-aminobenzoic acid modified glassy carbon electrode. Electrochemical reduction of AuCl4(-) anions sandwiched between CoTMPyP layers leads to the in situ formation of Au nanoparticles in the multilayer films. Regular growth of the multilayer films is monitored by UV-vis spectroscopy. UV-vis spectroscopy, X-ray photoelectron spectroscopy and cyclic voltammetry confirm the formation of Au nanoparticles in the multilayer films after electrochemical reduction of AuCl4(-) anions. Atomic force spectroscopy verifies that the as-prepared Au nanoparticles are uniformly distributed with average particles diameters of 20-25 mu. The resulting composite films containing Au nanoparticles with high stability exhibit high electrocatalytic activity for the reduction of dioxygen. Rotating disk electrode voltammetry and rotating ring-disk electrode voltammetry demonstrate the Au nanoparticles-containing films can catalyze two-electron reduction of O-2 to H2O2 in O-2-saturated 0.1 M H2SO4 solution. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：15 / 22

页数：8

共 46 条

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