In situ potential-dependent FTIR emission spectroscopy -: A novel probe for high temperature fuel cell interfaces

被引：51

作者：

Lu, XY ^{[1
]}

Faguy, PW ^{[1
]}

Liu, ML ^{[1
]}

机构：

[1] Georgia Inst Technol, Sch Mat Sci & Engn, Ctr Innovat Fuel Cell & Battery Technol, Atlanta, GA 30332 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2002年 / 149卷 / 10期

关键词：

D O I：

10.1149/1.1506981

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Potential-dependent Fourier transform infrared emission spectroscopy (pd-FTIRES) has been used for the first time to study, in situ, oxygen reduction under practical operating conditions of intermediate-temperature solid oxide fuel cells. Surface emission difference spectra of functioning cathodes at 550degrees C under a variety of feed gas conditions and overpotentials were obtained. Various surface oxygen anions were observed on the cathode surface under specific oxygen concentrations. The interfacial structural data were also correlated to ac impedance and chronoamperometric measurements. In addition to the bands associated with adsorbed oxygen anions, broad spectral features arising from the electrochemical polarization were also observed. These spectral features are believed to be due to electrochemically induced changes in the optical properties of the emitting surface layer. (C) 2002 The Electrochemical Society.

引用

页码：A1293 / A1298

页数：6

共 16 条

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