Ultralow content of Pt on Pd-Co-CuiC ternary nanoparticles with excellent electrocatalytic activity and durability for the oxygen reduction reaction

被引：29

作者：

Liu, Sufen ^{[1
]}

Xiao, Weiping ^{[1
]}

Wang, Jie ^{[1
]}

Zhu, Jing ^{[1
]}

Wu, Zexing ^{[1
]}

Xin, Huolin ^{[2
]}

Wang, Deli ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Hubei Key Lab Mat Chem & Serv Failure, Key Lab Mat Chem Energy Convers & Storage, Sch Chem & Chem Engn,Minist Educ, Wuhan 430074, Peoples R China

[2] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA

来源：

NANO ENERGY | 2016年 / 27卷

基金：

国家教育部博士点专项基金资助;

关键词：

Fuel cells; Oxygen reduction reaction; Pd6CoCu/C nanoparticles; Electrocatalysis; Core-shell; Pt monolayer; EFFICIENT CATALYSTS; SHELL NANOPARTICLES; FUEL-CELLS; MONOLAYER; STABILITY; PLATINUM; DECORATION; ALLOYS;

D O I：

10.1016/j.nanoen.2016.07.038

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：

Optimizing the utilization of Pt to catalyze the sluggish kinetics of the oxygen reduction reaction (ORR) is of vital importance in proton exchange membrane fuel cells. One of the strategies is to spread Pt atoms over the surface of a substrate to increase the surface area. Here we report a facile method to synthesize Pd6CoCu@Pt/C core-shell nanoparticles with an ultralow amount of Pt. It was found that Pt-coated layer on Pd6CoCu cores plays a vital role in enhancing the ORR activity and the cycling stability. The half-wave potential of Pd6CoCu@Pt/C positively shifts about 50 mV and 17 mV relative to (PdCoCu)-Co-6/C and Pt/C, respectively. The Pt mass activity on Pd6CoCu@Pt/C was calculated to be about 27 times higher than that on Pt/C catalysts at 0.9 V. Moreover, the Pd6CoCu@Pt/C nanoparticles exhibit superior stability with almost no decay for the ORR polarization curves during 10,000 potential cycles and the core-shell structure remains with only a slight increase in the thickness of the Pt overlayer. These findings provide a methodology for synthesizing highly efficient catalytic materials for the cathodic application in fuel cells. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：475 / 481

页数：7

共 28 条

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