In-situ Synthesis of Pd/WO3 Nanocomposites for Low-Temperature Hydrogen Gas Sensing

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In this study, H 2 sensors were developed with Pd-doped porous WO 3 (Pd/WO 3 ) as the sensing material using different amounts (wt%) of Pd.Pd/WO 3 was synthesized using an in-situ high-temperature solvothermal method.The surface morphology and nanostructure of Pd/WO 3 were characterized through X-ray diffraction and high-resolution transmission electron microscopy.1.0 wt% Pd/WO 3 exhibited the highest hydrogen-sensing ability compared to pure WO 3 and 0.5 wt% and 1.5 wt% Pd/WO 3 at 100 ∘ C. The Pd/WO 3 -based gas sensor demonstrated promising H 2 -sensing characteristics, such as high selectivity and good repeatability.Therefore, this sensor is an excellent candidate for use in applications that require high-performance low-temperature H 2 sensing.