Synthesis and Electrocatalytic Activity of Au-Pd Alloy Nanodendrites for Ethanol Oxidation

被引：215
作者：
Lee, Young Wook [1 ,2 ,3 ,4 ]
Kim, Minjung [1 ,2 ,3 ,4 ]
Kim, Yena [3 ,4 ]
Kang, Shin Wook [1 ,2 ]
Lee, Joon-Hwa [3 ,4 ]
Han, Sang Woo [1 ,2 ]
机构：
[1] Korea Adv Inst Sci & Technol, Dept Chem, Taejon 305701, South Korea
[2] Korea Adv Inst Sci & Technol, KI NanoCentury, Taejon 305701, South Korea
[3] Gyeongsang Natl Univ, Res Inst Nat Sci, Jinju 660701, South Korea
[4] Gyeongsang Natl Univ, Environm Biotechnol Natl Core Res Ctr, Jinju 660701, South Korea
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 17期
关键词：
BIMETALLIC NANOPARTICLES; PLATINUM NANOPARTICLES; GOLD NANOPARTICLES; CATALYTIC-ACTIVITY; REVERSE MICELLES; OXYGEN REDUCTION; NANOWIRE ARRAYS; FUEL-CELLS; METHANOL; ELECTROOXIDATION;
D O I：
10.1021/jp9119588
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：
Dendritic Au-Pd alloy nanoparticles were synthesized in high yield through the coreduction of HAuCl4 and K2PdCl4 in aqueous solutions by using hydrazine as a reducing agent. Relative compositions between Au and Pd at the particle surfaces as well as in bulk phases could be modulated by controlling the molar ratios between metal precursors in the feeding solutions. The formation of nanodendrites may be the result of the fast reduction rate of metal ions and subsequent fast, kinetically controlled growth of particles. The prepared alloy nanoparticles exhibit efficient electrocatalytic activities and stabilities toward ethanol oxidation in alkaline media. The enhanced electrocatalytic properties of dendritic particles can be attributed to the presence of a large number of active sites on their surfaces.
引用
收藏
页码：7689 / 7693
页数：5
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