Mechanical alloying preparation of La0.6Ca0.4CoIr0.25O3.5-δ as a bifunctional electrocatalyst in alkaline electrolyte

被引：15

作者：

Chang, Yun-Min ^{[1
]}

Wu, Pu-Wei ^{[1
]}

Wu, Cheng-Yeou ^{[1
]}

Hsieh, Yi-Fan ^{[1
]}

Chen, Jing-Yu ^{[1
]}

机构：

[1] Natl Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu 300, Taiwan

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2008年 / 11卷 / 04期

关键词：

D O I：

10.1149/1.2835200

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

La0.6Ca0.4CoIr0.25O3.5-delta was prepared by a mechanical alloying process from mixtures of La0.6Ca0.4CoO3 and IrO2. Scanning electron microscopy images on the resulting powders exhibited particles with irregular shape at 300-500 nm in size. X-ray diffraction analysis confirmed formation of a perovskite with complete disappearance of rutile signals from IrO2, indicating successful incorporation of Ir4+ at the Co3+ sites. Supported on carbon nanocapsules, the La0.6Ca0.4CoIr0.25O3.5-delta demonstrated superior performance over those of La0.6Ca0.4CoO3 in both charging and discharging current density-voltage polarizations. In addition, galvanostatic charging and discharging measurements at 25 and 100 mA/cm(2) indicated that the electrocatalytic abilities of La0.6Ca0.4CoIr0.25O3.5-delta are stable and sustainable.

引用

页码：B47 / B50

页数：4

共 30 条

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