Hollow core supported Pt monolayer catalysts for oxygen reduction

被引：70

作者：

Zhang, Yu ^{[1
]}

Ma, Chao ^{[2
,3
]}

Zhu, Yimei ^{[2
]}

Si, Rui ^{[1
]}

Cai, Yun ^{[1
]}

Wang, Jia X. ^{[1
]}

Adzic, Radoslav R. ^{[1
]}

机构：

[1] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA

[2] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA

[3] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China

来源：

CATALYSIS TODAY | 2013年 / 202卷

关键词：

Pt monolayer; Hollow nanoparticle; Oxygen reduction catalyst; Fuel cell; Galvanic replacement; Kirkendall effect; ELECTROCATALYSTS; DIFFUSION; REPLACEMENT; KIRKENDALL; NANOPARTICLES; DISSOLUTION; ADSORPTION; STABILITY; NANOTUBES; SURFACES;

D O I：

10.1016/j.cattod.2012.03.040

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

We synthesized high-activity electrocatalysts for the oxygen reduction reaction comprising a Pt monolayer shell on compact hollow nanoparticles. Pulse electrodeposited Ni nanoparticles were replaced galvanically by Pd and Pd-Au ions to obtain corresponding hollow nanoparticles. Pt monolayer catalysts supported on such hollow cores exhibited total-metal mass activities ranging from 0.41 to 0.57 A mg(-1), doubling that of 0.25 A mg(-1) for Pt monolayer catalysts on solid Pd cores. We attribute this enhanced activity to the smooth surface morphology and hollow-induced lattice contraction, in addition to the mass-saving geometry of hollow particles. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：50 / 54

页数：5

共 45 条

[1] Platinum monolayer fuel cell electrocatalysts [J].