Abstract
Nanosized materials based on tin dioxide with platinum additives were synthesized to create gas sensitive layers of semiconductor hydrogen sensors. Synthesis of the nanomaterials was carried out by a sol–gel method using ethylene glycol as a solvent. Influence of platinum additives on sensitivities of the obtained sensors to H2 and catalytic properties of the corresponding Pt-containing sensor nanomaterials in a reaction of H2 oxidation were studied. It was shown that the sensor properties depended on catalytic processes of H2 oxidation on the sensor surfaces. The most sensitive hydrogen sensor was obtained by impregnation of SnO2 with solution of 15.3 × 10−2 mol×L −1 H2PtCl6 and demonstrated a fast response time (8 s) and quick recovery time (10 s) at the optimal sensor temperature 260 oC.
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