Nitrogen-monoxide sensing with a commercial zirconia lambda gauge biased in amperometric mode

被引：10

作者：

Coillard, V

Juste, L

Lucat, C

Ménil, F

机构：

[1] PSA Peugeot Citroen, F-92250 La Garenne Colombes, France

[2] Univ Bordeaux 1, Lab IXL, F-33405 Talence, France

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 2000年 / 11卷 / 03期

关键词：

nitrogen-monoxide sensor; amperometric operating; lambda gauge; spinel;

D O I：

10.1088/0957-0233/11/3/307

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

One of the most promising principles for NO sensing in automotive exhaust gases today relies on amperometric sensors based on zirconia. The fact that materials at present used in potentiometric lambda oxygen gauges are very reliable in exhaust gases led us to mount such a gauge amperometrically. Apart from the good stability of the current levels, the investigation of a Bosch LSH6-type gauge showed that its sensitivity to NO was comparable to its sensitivity to oxygen when the external spinel-coated electrode was used as the cathode (direct bias). The disappearance of this sensitivity with a reverse bias demonstrates that MgAl2O4 plays a key role in the catalytic dissociation of nitrogen monoxide.

引用

页码：212 / 220

页数：9