Electrocatalytic cermet sensor

US5772863A · kind A · utility

Assignee

• THE UNIVERSITY OF CHICAGO · US

Inventors

• Erika Leigh Shoemaker · Richardson, US
• Michael Vogt · Bochum, DE

Key dates

• Filing date: May 1, 1996
• Grant date: Jun 30, 1998
• Expiry date: May 1, 2016

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/4071
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A sensor for O.sub.2 and CO.sub.2 gases. The gas sensor includes a plurality of layers driven by a cyclic voltage to generate a unique plot characteristic of the gas in contact with the sensor. The plurality of layers includes an alumina substrate, a reference electrode source of anions, a lower electrical reference electrode of Pt coupled to the reference source of anions, a solid electrolyte containing tungsten and coupled to the lower reference electrode, a buffer layer for preventing flow of Pt ions into the solid electrolyte and an upper catalytically active Pt electrode coupled to the buffer layer.