Preparation and electrocatalytic activity of palladium-platinum core-shell nanoalloys protected by a perfluorinated sulfonic acid ionomer

被引：17

作者：

Naohara, Hideo ^{[2
]}

Okamoto, Yasuaki ^{[1
]}

Toshima, Naoki ^{[1
]}

机构：

[1] Tokyo Univ Sci, Yamaguchi 7560884, Japan

[2] Toyota Motor Co Ltd, Shizuoka 4101193, Japan

来源：

JOURNAL OF POWER SOURCES | 2011年 / 196卷 / 18期

关键词：

Oxygen reduction reaction; Fuel cells; Nanoparticles; Electrocatalysis; Nafion; Core-shell structure; MONOLAYER ELECTROCATALYSTS; REDUCTION; COLLOIDS; PD(111);

D O I：

10.1016/j.jpowsour.2011.04.050

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：

Palladium-platinum nanoalloys with a core-shell and nano-network structure were successfully synthesized by a hydrogen sacrificial protective method in an aqueous solution directly using a perfluorinated sulfonic acid (PFSA) ionomer as a protecting agent. The structure, local composition and electrocatalytic activity for the oxygen reduction reaction of the Pd/Pt/PFSA nanoalloys were investigated by transmission electron microscopy (TEM), aberration corrected scanning transmission electron microscopy (Cs-STEM), energy-dispersive X-ray spectrometry (EDS) and voltammetry. The core-shell structure was completed without contaminating reducing agents, organic solvents, useless protecting agents and a mediator. The Pd/Pt/PFSA core-shell nanoalloys realized a high electrochemical surface area and better electrocatalytic mass-activity for the oxygen reduction reaction than the Pt/PFSA nanoparticles. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：7510 / 7513

页数：4

共 20 条

[1] Chemistry and properties of nanocrystals of different shapes [J].