Pt-Rh alloy nanodendrites for improved electrocatalytic activity and stability in methanol electrooxidation reaction

被引：21
|
作者：
Lee, Young-Woo [1 ]
Park, Kyung-Won [1 ]
机构：
[1] Soongsil Univ, Dept Chem Engn, Seoul 156743, South Korea
来源：
CATALYSIS COMMUNICATIONS | 2014年 / 55卷
关键词：
Platinum; Rhodium; Dendrite; Catalyst; Methanol electrooxidation; FUEL-CELL; BIMETALLIC NANODENDRITES; PLATINUM NANOCRYSTALS; NANOPARTICLES; FACETS; ACID; CO;
D O I：
10.1016/j.catcom.2014.06.009
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：
Structure-controlled metallic catalysts have been well known to exhibit an improved electrocatalytic activity due to modulated surface structures favorable for electrochemical reactions. We have synthesized Pt-Rh nanodendritic catalyst for methanol electrooxidation by a polyol method in the presence of PVP and L-ascorbic acid in aqueous solution. The as-synthesized Pt-Rh alloy nanoparticles exhibited a dendritic structure with well-defined alloy formation between the Pt and Rh metallic phase, uniform particle size and shape, and high-index facets. Furthermore, we found remarkably improved electrochemical properties of the Pt-Rh alloy nanodendrites i.e. improved electrocatalytic activity and stability for methanol electrooxidation in comparison with spherical Pt-Rh and pure Pt nanoparticles. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：24 / 28
页数：5
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