Electrical In Situ Characterization of Three-Way Catalyst Coatings

被引：21
|
作者：
Reiss, Sebastian [1 ]
Wedemann, Marion [1 ]
Moos, Ralf [1 ]
Roesch, Martin [2 ]
机构：
[1] Univ Bayreuth, Bayreuth Engine Res Ctr, D-95440 Bayreuth, Germany
[2] Umicore AG & Co KG, D-63403 Hanau, Germany
来源：
TOPICS IN CATALYSIS | 2009年 / 52卷 / 13-20期
关键词：
On-board diagnosis (OBD); Catalyst status; Oxygen storage; OSC; Ceria; Exhaust gas sensor; TWC; EXHAUST-GAS SENSORS;
D O I：
10.1007/s11244-009-9366-2
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
With a novel sensor, the electrical characteristics of a catalytically active three way catalyst coating can be gauged directly and evaluated. Therefore, in initial tests, several sensors that measure the electrical properties of the washcoat were mounted in a catalytic converter and the electrical resistances were measured. The sensors primarily provide information on the oxidation state of the oxygen storage compounds in the coating. It is shown that the sensor devices have fast response times and probably even react more sensitive to small changes in oxygen partial pressure than lambda-probes.
引用
收藏
页码：1898 / 1902
页数：5
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