Amperometric hydrocarbon sensor using La(Sr)Ga(Fe)O3 solid electrolyte for monitoring in exhaust gas

被引：27
|
作者：
Dutta, A
Nishiguchi, H
Takita, Y
Ishihara, T
机构：
[1] Kyushu Univ, Fac Engn, Dept Appl Chem, Fukuoka 8128581, Japan
[2] Oita Univ, Fac Engn, Dept Appl Chem, Oita 8701192, Japan
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2005年 / 108卷 / 1-2期
关键词：
hydrocarbon sensor; amperometric; iron-doped LaGaO3 electrolyte; low temperature sensing;
D O I：
10.1016/j.snb.2004.10.042
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Emission of hydrocarbon at low temperature, especially in the cold start condition of the automobile engine, has attracted attention these days. For the first time an electrochemical sensor based on LaGaO3 with iron doping was demonstrated to have very high sensitivity to propene (C3H6) at low temperature (423-573 K). In the amperometric mode, the output current signal was found to increase linearly with the C3H6 concentration (500-2000ppm) in logarithm scale. Effect of iron doping at the gallium site was found to influence the sensing properties greatly and the electrolyte composition La0.7Sr0.3Ga0.7Fe0.3O3 showed the highest sensitivity of 976 mu A/decade at 473 K. The sensors were fast, reproducible and highly selective to hydrocarbons. (c) 2004 Elsevier B.V All rights reserved.
引用
收藏
页码：368 / 373
页数：6
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