Silver migration at the Ag|Sm0.2Ce0.8O1.9 interface

被引：2

作者：

Dudek, Magdalena Maria ^{[1
]}

Mosialek, Michal ^{[2
]}

Nowak, Pawe ^{[2
]}

Wojewoda-Budka, Joanna ^{[3
]}

Reben, Manuela ^{[4
]}

机构：

[1] AGH Univ Sci & Technol, Fac Fuels & Energy, Mickiewicza 30, PL-30059 Krakow, Poland

[2] Jerzy Haber Inst Catalysis & Surface Chem PAS, PL-30239 Krakow, Poland

[3] Inst Met & Mat Sci PAS, Krakow, Poland

[4] AGH Univ Sci & Technol, Fac Mat Sci & Ceram, PL-30059 Krakow, Poland

来源：

JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2014年 / 18卷 / 09期

关键词：

OXIDE FUEL-CELL; VERTICAL-BAR-YSZ; 3-PHASE-BOUNDARY DYNAMICS; ELECTRODE-REACTION; IT-SOFCS; AG; CATHODES; POLARIZATION; PERFORMANCE; MICROELECTRODES;

D O I：

10.1007/s10008-014-2503-2

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The behavior of a silver electrode contacting Ce0.8Sm0.2O1.9 (samaria-doped ceria or SDC) electrolyte under external cathodic polarization in the temperature range 350-700 A degrees C was examined by means of long-term polarization experiments, scanning electron microscopy, and electrochemical impedance spectroscopy. A silver deposit is formed around the silver cathode via a surface migration mechanism without the occurrence of the gas-phase transport phenomenon during polarization. This results in an increase in both the electrode-electrolyte contact area and the triple-phase boundary length, which in turn causes decreases in charge transfer resistance and electrolyte resistance.

引用

页码：2529 / 2537

页数：9

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