A study of metal (Ni, Pt, Au)/yttria-stabilized zirconia interface in hydrogen atmosphere at elevated temperature

被引：67
作者：
Kek, D [1 ]
Mogensen, M
Pejovnik, S
机构：
[1] Jozef Stefan Inst, SI-1000 Ljubljana, Slovenia
[2] Riso Natl Lab, Mat Res Dept, DK-4000 Roskilde, Denmark
[3] Natl Inst Chem, SI-1000 Ljubljana, Slovenia
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2001年 / 148卷 / 08期
关键词：
D O I：
10.1149/1.1383069
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The properties of selected metal (Pt, Ni, Au)/YSZ single crystal interfaces have been investigated by current-voltage measurements and impedance spectroscopy. A three-electrode cell consisting of a quasi-point-contact metal working electrode and Pt reference and counter electrodes were constructed and studied under various conditions. The impedance response consists of at least two processes, both belonging to interfacial properties: a high frequency process with peak frequency between 10(4) and 10(3) Hz, and a low frequency process with peak frequency between 0.5 and 50 Hz. An increase in overall electrochemical reaction rate and in the interfacial capacitance under prolonged anodic polarization was observed. A mechanism based on the spillover of oxide or hydroxide ions on the metal surface is proposed. (C) 2001 The Electrochemical Society.
引用
收藏
页码：A878 / A886
页数：9
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