Study of a WO3 thin film based hydrogen gas sensor decorated with platinum nanoparticles

•Pt NPs are evaporated by a rapid thermal evaporation method.•Hydrogen sensing characteristics of RTE-Pt NP/WO3 device are comprehensively studied.•Excellent hydrogen sensing response of 1.41×106 is obtained under 1% H2/air gas at 200 °C.•A lower detection limit of 1 ppm H2/air is obtained.•FOD and SPPCI algorithms are employed to filter (restore) the redundant (reduced) data.