Semiconductor adsorption sensors based on nanosized Pt/SnO2 materials and their sensitivity to methane

The effect of platinum additives on the sensitivity of sensors based on nanosized tin oxide to methane is investigated. It is shown that addition of Pt increases a sensor's sensitivity to CH4. It is found that the dependences of electrical resistance and sensor sensitivity on the concentration of the impregnating solutions of H-2[PtCl6] are extremal, which is explained from the point of view of heterogeneous catalysis concepts of the functioning of semiconductor adsorption sensors.