Size-dependent oxygen reduction property of octahedral Pt-Ni nanoparticle electrocatalysts

被引：62

作者：

Zhang, Changlin ^{[1
]}

Hwang, Sang Youp ^{[1
]}

Peng, Zhenmeng ^{[1
]}

机构：

[1] Univ Akron, Dept Chem & Biomol Engn, Akron, OH 44325 USA

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2014年 / 2卷 / 46期

关键词：

METAL-FREE ELECTROCATALYSTS; HIGH-PERFORMANCE; ALLOY NANOPARTICLES; FUEL-CELLS; PLATINUM; CORE; CATALYSTS; SURFACE; SHELL; STRAIN;

D O I：

10.1039/c4ta04728a

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：

The size effect on the electrocatalytic property of octahedral Pt-Ni alloy nanoparticles in the oxygen reduction reaction (ORR) was studied by making particles with different sizes and conducting electrochemical measurements. Octahedral Pt-Ni nanoparticles on carbon support (Pt-Ni/C) were produced using a facile and surfactant-free solid-state chemistry method. Two groups of octahedral Pt-Ni/C, including Pt3Ni/C and Pt1.5Ni/C, with particle size ranging from around 4 to 8 nm were prepared. Both the ORR activity and the stability of the two group catalysts were studied, which exhibited varying dependence over the particle size. The different relationships between the Pt-Ni size and the ORR property were investigated and attributed to alterations in the particle electronic/geometric structure and the Ni leaching behaviour.

引用

页码：19778 / 19787

页数：10

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