Summary: Novel Carbon Monoxide Sensor for PEM Fuel Cell Systems
C.T. Holt, A.-M. Azad, S.L. Swartz, W.J. Dawson, and P.K. Dutta
NexTech Materials, Ltd.
720 Lakeview Plaza Blvd.
Worthington, OH 43085
Research has been conducted to develop a novel sensor
for the detection of carbon monoxide in the presence of
hydrogen and nitrogen. The automotive fuel cell
application requires a sensor to detect low levels of carbon
monoxide (~1ppm CO) in order to control the fuel
processor. The novel sensing approach pursued here is
based on the reversible adsorption of CO onto and
complexation with a copper chloride film. When suitable
film synthesis conditions are used, the resistance of the
device exhibited a rapid and reversible sensitivity to carbon
monoxide, even in the presence of 50vol% hydrogen.
The importance of carbon monoxide sensors for
automotive PEM fuel cell systems is illustrated by a