Study of Pt electrode/Nafion ionomer interface in HClO4 by in situ surface-enhanced FTIR spectroscopy

被引：76

作者：

Ayato, Y

Kunimatsu, K

Osawa, M

Okada, T

机构：

[1] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058565, Japan

[2] Hokkaido Univ, Catalysis Res Ctr, Sapporo, Hokkaido 0010021, Japan

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2006年 / 153卷 / 02期

关键词：

D O I：

10.1149/1.2137648

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Pt electrode/Nafion interface has been characterized in HClO4 aqueous solutions using surface-enhanced infrared absorption spectroscopy (SEIRAS) with the aim of investigating the structure of the interface which plays a crucial role in the performance of polymer electrolyte fuel cells (PEFCs). A potential dependent band was found around 1100 cm(-1) and assigned to the symmetric vibration of the -SO3- groups of the ionomer membrane. Electric field driven orientation/adsorption of the ionomer membrane at the interface was suggested from the potential dependence of the band intensities of -SO3- groups. It was inferred that the -SO3- groups act like counterions at the Pt/ionomer interface to form the electric double layer. (c) 2005 The Electrochemical Society. [DOI: 10.1149/1.2137648] All rights reserved.

引用

页码：A203 / A209

页数：7

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