Self-assembly of Au-Pt core-shell nanoparticles for effective enhancement of methanol electrooxidation

被引：38
|
作者：
Duan, Mei-Yun [1 ]
Liang, Ren [1 ]
Tian, Na [2 ]
Li, Yong-Jun [1 ]
Yeung, Edward S. [1 ]
机构：
[1] Hunan Univ, Sch Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
[2] Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2013年 / 87卷
关键词：
Au-Pt core-shell nanoparticle; Self-assembly; Methanol; Electrooxidation; HIGHLY-ACTIVE ELECTROCATALYSTS; MULTIWALLED CARBON NANOTUBES; FUEL-CELL; GOLD NANOPARTICLES; NANOPOROUS GOLD; OXIDATION REACTION; FORMIC-ACID; FILM; SURFACE; ELECTROSYNTHESIS;
D O I：
10.1016/j.electacta.2012.09.076
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Au-Pt core-shell nanoparticles (Au-Pt NPs) as an effective bimetallic electrocatalyst for methanol oxidation has been extensively explored. However, the conventional drop-coating method for fabricating Au-Pt NP electrodes did not fully exploit the small size of the NPs. Here, self-assembly of Au-Pt NPs into monolayer arrays is proposed as an alternative for the preparation of Au-Pt NP catalytic electrode to ensure the exposure of each NP to electrolyte. Under the optimized condition, the Pt mass activity of the Au-Pt monolayer array was similar to 6 times better than that of the commercial Pt/C catalyst, and 3 times better than that of Au-Pt NP electrodes fabricated by a drop-coating method, indicating superior electrocatalytic activity. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：432 / 437
页数：6
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