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Electrochemical Behavior Of Dense Electrodes For Impedancemetric Nox Sensors, Nabamita Pal
Electrochemical Behavior Of Dense Electrodes For Impedancemetric Nox Sensors, Nabamita Pal
Doctoral Dissertations
NOx (NO and NO2) exhaust gas sensors for diesel powered vehicles have traditionally consisted of porous platinum (Pt) electrodes along with a dense ZrO2 based electrolyte. Advancement in diesel engine technology results in lower NOx emissions. Although Pt is chemically and mechanically tolerant to the extreme exhaust gas environment, it is also a strong catalyst for oxygen reduction, which can interfere with the detection of NOx at concentrations below 100 ppm. Countering this behavior can add to the complexity and cost of the conventional NO x sensor design. Recent studies have shown that dense electrodes are less prone to heterogeneous …