The influence of catalytic activity on the response of Pt/SnO2 gas sensors to carbon monoxide and hydrogen

The article presents the results of research studies on ceramics SnO2 sensors with Pt catalysts. The role of catalysis in gas sensing mechanisms was investigated. In order to obtain samples with different catalytic activity but with identical Pt loading, the Pt/SnO2 catalysts were calcined at different temperatures (400–800 °C). Structural analysis of these samples was performed. Among the sensors manufactured with Pt/SnO2, the highest sensitivity was shown for the sensor obtained with Pt/SnO2 sample sintered at 800 °C. The correlation between catalytic activity and sensor sensitivity is given.