The impact of Ru contamination of a Pt/C electrocatalyst on its oxygen-reducing activity

被引：40

作者：

Gancs, Lajos ^{[1
]}

Hult, Brian Nicholas ^{[1
]}

Hakim, Nazih ^{[1
]}

Mukerjee, Sanjeev ^{[1
]}

机构：

[1] Northeastern Univ, Dept Chem & Biol Chem, Boston, MA 02115 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2007年 / 10卷 / 09期

关键词：

D O I：

10.1149/1.2754382

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Rotating disk electrode experiments were used to demonstrate the influence of dissolved Ru species on the oxygen reduction activity of a Pt/ C electrocatalyst. Dissolved Ru in micromolar levels was found to deposit instantly onto Pt, thereby blocking the electrode surface for ORR at low overpotentials. Ru contamination can decrease oxygen reduction kinetics by eightfold or increase the overpotential by ca. 160 mV. This facet of fuel cell durability needs special attention from the perspective of appropriate materials choice, i. e., preventing the leaching of Ru from PtRu anodes and its crossover to the cathode across the membrane electrolyte. (c) 2007 The Electrochemical Society.

引用

页码：B150 / B154

页数：5

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