Oxygen reduction activity of lanthanum strontium nickel ferrite

被引：20

作者：

Coffey, GW ^{[1
]}

Hardy, JS ^{[1
]}

Pederson, LR ^{[1
]}

Rieke, PC ^{[1
]}

Thomsen, EC ^{[1
]}

机构：

[1] Pacific NW Natl Lab, Div Mat, Richland, WA 99352 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2003年 / 6卷 / 06期

关键词：

D O I：

10.1149/1.1568174

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The reduction of oxygen on nickel-doped lanthanum strontium ferrite was studied by current interrupt cyclic voltammetry. Nickel doped on the B site of the perovskite ranged from 0 to 40%. Nickel strongly influenced the sintering of the films. The minimum temperature at which a stable adherent robust film could be formed increased with nickel content. The electrochemical performance for reduction of oxygen was compared with nickel content. Undoped lanthanum strontium ferrite consistently showed greater activity than the doped materials. The data were further analyzed to obtain the exchange current density as a function of temperature and then further analyzed to obtain the activation energy and pre-exponential factor. These values did not correlate with nickel composition but did correlate with one another. The variation in performance was tentatively attributed to subtle variations in microstructure. (C) 2003 The Electrochemical Society.

引用

页码：A121 / A124

页数：4

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