Total Nitrogen Oxides Gas Sensor Based on Solid Electrolytes with Refractory Oxide-Based Auxiliary Electrode

A new type of total nitrogen oxides gas sensor was fabricated by the conjunction of trivalent aluminum cation and divalent oxide anion conducting solid electrolytes with potassium nitrite-doped rare earth oxide-based auxiliary electrode. The sensor response was rapid, reproducible, and a continuous response was obtained. The sensor's electromotive force output is equivalent in both NO and detection with obeying the Nernst relationship, indicating that a quantitative total (NO plus gases) gas detection can be successfully realized. © 2004 The Electrochemical Society. All rights reserved.