Journal
KOREAN JOURNAL OF CHEMICAL ENGINEERING
Volume 24, Issue 6, Pages 927-931Publisher
KOREAN INSTITUTE CHEMICAL ENGINEERS
DOI: 10.1007/s11814-007-0099-2
Keywords
hydrogen sensor; catalytic combustion; F-doped SnO2; Pd/Pt catalyst
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A planar catalytic combustion gas sensor based on Pd/Pt catalyst supported on F-doped SnO2 nano-crystalline materials has been designed and fabricated for hydrogen detection. The sensor consists of platinum heaters on an alumina plate coated with a catalytic layer and compensating layer. This sensor exhibited better performance than that of the sensors employing sensing material of Pd/Pt catalyst on gamma-Al2O3, and of Pd/Pt catalyst on nano-crystalline SnO2. The detection limit of the sensor at 370 degrees C is in the concentration range of 0.5-5% (v/v), with an excellent linearity of signal voltage to the hydrogen gas concentration.
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