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US 5,716,506 AGranted
Electrochemical sensors for gas detection
AssigneeThe Board of Trustees of the University of Illinois
InventorsG. Jordan Maclay, Darioush Keyvani, Sung B. Lee
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Abstract
Amperometric electrochemical sensors for detection of an analyte gas in air are disclosed. The sensors can be used in a gas detector to detect the analyte gas and to compensate for the relative humidity and temperature of the air. In addition, an electrochemical sensor having high surface area electrodes, and an increased sensitivity, is disclosed.
Claims6
An electrochemical sensor to detect the presence and concentration of carbon monoxide in air, said sensor comprising:
- (a) a substrate;
- (b) a working electrode deposited on a surface of the substrate;
- (c) a counter electrode deposited on a surface of the substrate;
- and
- (d) a film of a polymer electrolyte applied over the working and counter electrodes, wherein the sensor is free of a reference electrode and wherein the working electrode comprises a first layer of gold, platinum, or carbon in contact with the substrate, said first layer having a thickness of about 250 to about 5000 .ANG., and a second high surface area layer of platinum in contact with the first layer.
2 more elements
Dependencies are inferred from the claim text.