Adsorbate-Induced Surface Segregation for Core-Shell Nanocatalysts

被引：273

作者：

Mayrhofer, Karl J. J. ^{[1
]}

Juhart, Viktorija ^{[1
]}

Hartl, Katrin ^{[1
]}

Hanzlik, Marianne ^{[1
]}

Arenz, Matthias ^{[2
]}

机构：

[1] Tech Univ Munich, Lehrstuhl Phys Chem, D-85748 Garching, Germany

[2] Tech Univ Munich, Inst Elektronenmikroskopie, D-85748 Garching, Germany

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2009年 / 48卷 / 19期

关键词：

core-shell nanoparticles; fuel cells; supported catalysis; oxygen reduction; surface segregation; O-2; REDUCTION; ALLOYS; OXYGEN; ELECTROCATALYSIS; CHEMISORPTION; CATALYSTS;

D O I：

10.1002/anie.200806209

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Coming to the surface: The surface composition of carbon-supported Pt 3Co catalyst particles changes upon a CO-annealing treatment. Platinum atoms segregate to the particle surface so that nanoparticles with a platinum shell surrounding an alloy core are formed. This modified catalyst has a superior activity in the oxygen reduction reaction compared to both a plain platinum catalyst and the untreated alloy particles. © 2009 Wiley-VCH Verlag GmbH & Co. KGaA.

引用

页码：3529 / 3531

页数：3

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