Oxygen reduction activity of Pt and Pt-Mn-Co electrocatalysts sputtered on nano-structured thin film support

被引：99

作者：

Bonakdarpour, Arman

Stevens, Krystal

Vernstrom, George D.

Atanasoski, Radoslav

Schmoeckel, Alison K.

Debe, Mark K.

Dahn, Jeff R. ^{[1
]}

机构：

[1] Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 3J5, Canada

[2] 3M Fuel Cell Components Program, St Paul, MN 55144 USA

来源：

ELECTROCHIMICA ACTA | 2007年 / 53卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

nano-structured thin film support; ternary Pt-Co-Mn alloy; oxygen reduction; RRDE;

D O I：

10.1016/j.electacta.2007.07.038

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We report on extensive measurements of oxygen reduction activity of Pt and Pt-Co-Mn electrocatalysts using the rotating ring-disk electrode (RRDE) method. The clectrocatalysts were prepared by sputtering from Pt or Pt, Co and Mn targets onto 3M's nano-structured thin film support (NSTF) structures. The area specific activity of Pt/NSTF, measured in 0.1 M HCIO4 and at room temperature, is similar to that of bulk Pt. The area specific measurements show a 20 mV reduction in the Pt-Co-Mn/NSTF overpotential compared to Pt/NSTF. The corresponding kinetic gain in the area specific activity of the ternary alloy is about a factor of two. This ORR enhancement factor observed in the ternary Pt-Co-Mn/NSTF by RRDE measurements is similar to the results obtained in 50 cm(2) H-2/air fuel cells. (c) 2007 Published by Elsevier Ltd.

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收藏

页码：688 / 694

页数：7

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