SECM imaging of electrocatalytic activity for oxygen reduction reaction on thin film materials

被引：22

作者：

Lu, Guojin ^{[1
]}

Cooper, James S.

McGinn, Paul J.

机构：

[1] Univ Notre Dame, Dept Chem & Biomol Engn, Notre Dame, IN 46556 USA

[2] Univ Notre Dame, Ctr Mol Engineered Mat, Notre Dame, IN 46556 USA

来源：

ELECTROCHIMICA ACTA | 2007年 / 52卷 / 16期

关键词：

PEM fuel cells; scanning electrochemical microscopy (SECM); tip generation-substrate collection (TG-SC) mode; oxygen reduction reaction (ORR); combinatorial discovery;

D O I：

10.1016/j.electacta.2007.02.022

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The oxygen reduction reaction (ORR) on sputtered Pt thin films in acidic solution was successfully studied by scanning electrochemical microscopy (SECM) in a modified tip generation-substrate collection (TG-SC) mode. SECM images of ORR activity in different sample areas were obtained and it is shown that this TG-SC SECM technique can be used to screen electrocatalytic activity of continuous thin film samples efficiently and quickly for the ORR in an acidic medium. It is observed that this technique is not very sensitive to the tip-substrate separation within a certain range. The SECM images obtained are strongly dependent on the substrate potential. The advantages of this technique for studying ORR electrocatalysts are discussed. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：5172 / 5181

页数：10

共 23 条

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