Electrocatalytic Oxidation of CO on Gold Nanoparticles Assembled on Bulky Noble Metal Substrates

Acta Chimica Sinica ›› 2007, Vol. 65 ›› Issue (21): 2370-2376. Previous Articles Next Articles

组装在贵金属基底上的金纳米粒子对CO的电化学催化氧化

张大峰¹，刁鹏*^{,1，刘鹏²，王静懿¹，项民¹，张琦¹}

(¹北京航空航天大学材料科学与工程学院应用化学系北京 100083)
(²北京科技大学应用科学学院应用物理系北京 100083)

投稿日期:2007-01-15 修回日期:2007-05-31 发布日期:2007-11-14
通讯作者: 刁鹏

Electrocatalytic Oxidation of CO on Gold Nanoparticles Assembled on Bulky Noble Metal Substrates

ZHANG Da-Feng¹; DIAO Peng*^{,1; LIU Peng²; WANG Jing-Yi¹; XIANG Min¹; ZHANG Qi¹}

(¹ Department of Applied Chemistry, School of Materials Science and Engineering, Beijing University of Aeronautics & Astronautics, Beijing 100083)
(² Department of Applied Physics, School of Applied Science, University of Science and Technology Beijing, Beijing 100083)

Received:2007-01-15 Revised:2007-05-31 Published:2007-11-14
Contact: DIAO Peng

Abstract

Gold nanoparticles (AuNPs) have been successfully deposited on bulky gold and platinum electrodes by a self-assembly method, and the electrocatalytic activity of AuNPs has been studied in detail by cyclic voltammetry in a CO saturated alkaline solution. The experimental results show that, compared with bulky gold, the AuNPs assembled both on Au and Pt electrodes exhibit well-distinguishable electrocatalyic activity toward CO. This is the first report about the electrocatalytic oxidation of CO on gold nanoparticles with a diameter larger than 10 nm. Furthermore, the effect of gold oxides on the electrocatalytic activity of AuNPs has been investigated. It was shown that formation of a gold oxide layer on the surface of AuNPs was one of the key steps for the electrocatalytic oxidation of CO on Au and Pt supported gold nanoparticles. For AuNPs with the same diameter, the more the amount of gold oxide on their surface, the higher the electrocatalytic activity for CO oxidation.

Key words: gold nanoparticle, carbon monoxide, electrochemistry, catalytic oxidation

Cite this article

ZHANG Da-Feng; DIAO Peng*^,1; LIU Peng²; WANG Jing-Yi; XIANG Min; ZHANG Qi. Electrocatalytic Oxidation of CO on Gold Nanoparticles Assembled on Bulky Noble Metal Substrates[J]. Acta Chimica Sinica, 2007, 65(21): 2370-2376.

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组装在贵金属基底上的金纳米粒子对CO的电化学催化氧化

Electrocatalytic Oxidation of CO on Gold Nanoparticles Assembled on Bulky Noble Metal Substrates

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