Correlation between platinum nanoparticle surface rearrangement induced by heat treatment and activity for an oxygen reduction reaction

被引：28

作者：

Chung, Dong Young ^{[1
,2
]}

Chung, Young-Hoon ^{[1
,2
]}

Jung, Namgee ^{[3
]}

Choi, Kwang-Hyun ^{[1
,2
]}

Sung, Yung-Eun ^{[1
,2
]}

机构：

[1] Seoul Natl Univ, Inst Basic Sci, Ctr Nanoparticle Res, Seoul 151742, South Korea

[2] Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 151742, South Korea

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

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2013年 / 15卷 / 32期

基金：

新加坡国家研究基金会;

关键词：

SINGLE-CRYSTAL ELECTRODES; ROTATING-DISK ELECTRODE; CO ELECTROOXIDATION; PARTICLE-SIZE; BIMETALLIC SURFACES; CATALYTIC-ACTIVITY; PT-RU; ELECTROCATALYSTS; STABILITY; OXIDATION;

D O I：

10.1039/c3cp51520f

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：

Heat treatment of nanoparticles could induce the surface rearrangement for more stable facet exposure induced by thermodynamics. By changing the heat treatment environment, we confirmed the correlation between the oxygen reduction activity and the effect of surface oxide and the degree of surface rearrangement of Pt nanoparticles. Native surface oxide was not a critical factor for oxygen reduction activity. However, the degree of surface rearrangement could affect the activity, which was confirmed by the surface sensitive techniques such as COad oxidation and potential of zero total charge. Analysis indicated that the driving force for nanoparticle surface rearrangement was affected by the heat treatment environment such as gas, in our case.

引用

页码：13658 / 13663

页数：6

共 46 条

[41] Promoting effects of La for improved oxygen reduction activity and high stability of Pt on Pt-La alloy electrodes [J].