Structural and electrochemical studies of Au-Pt nanoalloys

被引：95

作者：

Habrioux, Aurelien ^{[1
]}

Vogel, Walter ^{[2
]}

Guinel, Maxime ^{[3
]}

Guetaz, Laure ^{[3
]}

Servat, Karine ^{[1
]}

Kokoh, Boniface ^{[1
]}

Alonso-Vante, Nicolas ^{[1
]}

机构：

[1] Univ Poitiers, CNRS, UMR 6503, Lab Electrocatalysis, F-86022 Poitiers, France

[2] Natl Cent Univ, Dept Chem, Tao Yuan 32001, Taiwan

[3] CEA, F-38054 Grenoble, France

来源：

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

关键词：

OXYGEN REDUCTION CATALYSTS; AU/PT BIMETALLIC NANOPARTICLES; TRANSITION-METAL SULFIDES; PLATINUM-GOLD ALLOYS; X-RAY-DIFFRACTION; PARTICLES; ELECTROOXIDATION; MICROEMULSIONS; ELECTRODES; OXIDATION;

D O I：

10.1039/b820668f

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：

Carbon supported Au-Pt catalysts with different bimetallic compositions were prepared by water-in-oil (w/o) micro-emulsions. Carbon Vulcan XC-72R was added during the synthesis of particles in order to obtain good dispersion. Structural characterization was performed using XRD (X-ray diffraction) at wide angles, WAXS (wide-angle X-ray scattering) which showed that Pt-Au particles exhibited alloy properties in samples with high gold-content, and a segregation effect for those with low gold-content. Electrochemical characterization allowed estimation of the surface composition of Pt-Au alloys. These experiments have been confirmed by XRD data. Moreover, HRTEM (high resolution transmission electron microscopy) and XEDS (X-ray energy dispersive spectroscopy) characterization further confirmed the electrochemical results and XRD data. CO stripping experiments have shown an increasing bonding energy between CO and platinum with the gold content in the nanoalloys.

引用

页码：3573 / 3579

页数：7

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