Preparation via microemulsion method and proton conduction at intermediate-temperature of BaCe1-xYxO3-α

被引：67

作者：

Guo, Yingxin ^{[1
]}

Liu, Baoxin ^{[1
]}

Yang, Qing ^{[1
]}

Chen, Cheng ^{[1
]}

Wang, Wenbao ^{[1
]}

Ma, Guilin ^{[1
]}

机构：

[1] Soochow Univ, Key Lab Organ Synth Jiangsu Prov, Coll Chem Chem Engn & Mat Sci, Suzhou 215123, Peoples R China

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2009年 / 11卷 / 01期

基金：

中国国家自然科学基金;

关键词：

BaCeO3; Proton conductor; Microemulsion; Impedance; Ammonia synthesis at atmospheric pressure; Y-DOPED BACEO3; ATMOSPHERIC-PRESSURE; AMMONIA-SYNTHESIS; IONIC-CONDUCTION; SINTERED OXIDES; LA0.9SR0.1GA0.8MG0.2O3-ALPHA; NONSTOICHIOMETRY; CERAMICS;

D O I：

10.1016/j.elecom.2008.10.038

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The ceramic powders of BaCe1-xYxO3-alpha (x = 0.05, 0.10, 0.15, 0.20) have been prepared via a microemulsion method, Green compacts of the powders were sintered to densities higher than 95% of theoretical at the lower temperature (1500 degrees C). The obtained ceramics showed a single-phase of orthorhombic perovskite. The proton conduction was investigated by employing the techniques of AC impedance and electrochemical hydrogen permeation (hydrogen pumping) at 300-600 degrees C. It was found that the ceramics were almost pure proton conductors in wet hydrogen, and the highest proton conductivity was observed for x = 0.15 at 600 degrees C. Ammonia was synthesized successfully from nitrogen and hydrogen at atmospheric pressure in the electrolytic cell using BaCe1-xYxO3-alpha. The maximum rate of NH3 formation was found to be 2.1 x 10(9) mol s(-1) cm(-2) at 500 degrees C with an applied current of 0.75 mA. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：153 / 156

页数：4

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