Detection of CO in a reducing, hydrous environment using CuBr as electrolyte

The resistance changes of CuBr upon exposure to carbon monoxide (CO) are explored as the sensing principle in this study. X-ray diffraction and thermal analysis were used to characterize the CuBr. Thick-films of CuBr deposited on an alumina substrate with gold interdigitated electrodes were used as...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2003-07, Vol.92 (3), p.351-355
Main Authors: Gopal Reddy, C.V., Dutta, Prabir K., Akbar, Sheikh A.
Format: Article
Language:English
Subjects:
Copper halides
Fuel cell sensor
Sensing in hydrogen
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Summary:The resistance changes of CuBr upon exposure to carbon monoxide (CO) are explored as the sensing principle in this study. X-ray diffraction and thermal analysis were used to characterize the CuBr. Thick-films of CuBr deposited on an alumina substrate with gold interdigitated electrodes were used as the sensing element. Interaction with CO led to decrease in electrical resistance of the films. The presence of H 2 in the background gas did not influence the resistance. Humidity, on the other hand did change the background resistance, but at constant humidity, the sensor exhibited resistance changes with CO. This sensor could be useful for CO detection in the hydrated environment of polymeric-based fuel cell systems that use hydrocarbons.
ISSN:0925-4005
1873-3077
DOI:10.1016/S0925-4005(03)00318-6