Promoting effects of La for improved oxygen reduction activity and high stability of Pt on Pt-La alloy electrodes

被引：84

作者：

Yoo, Sung Jong ^{[1
]}

Hwang, Seung Jun ^{[1
]}

Lee, June-Gunn ^{[2
]}

Lee, Seung-Cheol ^{[2
]}

Lim, Tae-Hoon ^{[1
]}

Sung, Yung-Eun ^{[3
]}

Wieckowski, Andrzej ^{[4
]}

Kim, Soo-Kil ^{[5
]}

机构：

[1] Korea Inst Sci & Technol, Fuel Cell Res Ctr, Seoul 136791, South Korea

[2] Korea Inst Sci & Technol, Computat Sci Ctr, Seoul 136791, South Korea

[3] Seoul Natl Univ, World Class Univ Program Chem Convergence Energy, Sch Chem & Biol Engn, Seoul 151742, South Korea

[4] Univ Illinois, Dept Chem, Urbana, IL 61801 USA

[5] Chung Ang Univ, Sch Integrat Engn, Seoul 156756, South Korea

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2012年 / 5卷 / 06期

基金：

新加坡国家研究基金会;

关键词：

DENSITY-FUNCTIONAL THEORY; SURFACE ALLOYS; TRENDS; ELECTROCATALYSTS; DISSOLUTION; PLATINUM; CATALYST; METAL; REACTIVITY; PALLADIUM;

D O I：

10.1039/c2ee02691k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The design of polymer electrolyte fuel cell electrocatalysts depends on two equally important fundamental principles: the optimization of electrocatalytic activities as well as the long-term stability under operating conditions (e.g., pH < 1 and E > 0.8 V). Pt-based alloys with transition metals (i.e., Pt-La) address both of these key issues. The oxygen reduction kinetics depends on the alloy composition which, in turn, is related to the d-band center position. The stability of the oxygen reduction reaction is predictable by correlation of the d-band fillings and vacancies of Pt-M (M = Ti, Fe, Zr and La).

引用

页码：7521 / 7525

页数：5

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