Design and Synthesis of Bimetallic Electrocatalyst with Multilayered Pt-Skin Surfaces

被引：544

作者：

Wang, Chao ^{[1
]}

Chi, Miaofang ^{[2
]}

Li, Dongguo ^{[1
,3
]}

Strmcnik, Dusan ^{[1
]}

van der Vliett, Dennis ^{[1
]}

Wang, Guofeng ^{[4
]}

Komanicky, Vladimir ^{[1
,5
]}

Chang, Kee-Chul ^{[1
]}

Paulikas, Arvydas P. ^{[1
]}

Tripkovic, Dusan ^{[1
]}

Pearson, John ^{[1
]}

More, Karren L. ^{[2
]}

Markovic, Nenad M. ^{[1
]}

Stamenkovic, Vojislav R. ^{[1
]}

机构：

[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[2] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

[3] Brown Univ, Dept Chem, Providence, RI 02912 USA

[4] Univ Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15260 USA

[5] Safarik Univ, Fac Sci, Kosice 04154, Slovakia

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2011年 / 133卷 / 36期

关键词：

RAY-ABSORPTION SPECTROSCOPY; OXYGEN REDUCTION REACTION; FUEL-CELL CATALYSTS; ELECTRONIC-PROPERTIES; IN-SITU; NANOPARTICLES; PLATINUM; STABILITY; MECHANISM; IFEFFIT;

D O I：

10.1021/ja2047655

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Advancement in heterogeneous catalysis relies on the capability of altering material structures at the nanoscale, and that is particularly important for the development of highly active electrocatalysts with uncompromised durability. Here, we report the design and synthesis of a Pt-bimetallic catalyst with multilayered Pt-skin surface, which shows superior electrocatalytic performance for the oxygen reduction reaction (ORR). This novel structure was first established on thin film extended surfaces with tailored composition profiles and then implemented in nanocatalysts by organic solution synthesis. Electrochemical studies for the ORR demonstrated that after prolonged exposure to reaction conditions, the Pt-bimetallic catalyst with multilayered Pt-skin surface exhibited an improvement factor of more than 1 order of magnitude in activity versus conventional Pt catalysts. The substantially enhanced catalytic activity and durability indicate great potential for improving the material properties by fine-tuning of the nanoscale architecture.

引用

页码：14396 / 14403

页数：8

共 39 条

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