Pd@MoS2 nanosheets based room-temperature hydrogen sensor

Abstract

In this work, we reported a simple, scalable, and low-cost method based on a simple solution process for fabricating room-temperature hydrogen sensors. The sensor was prepared by loading palladium on the ultrasonically exfoliated MoS₂ surface by liquid-phase reduction, and then drop-casting the MoS₂-containing solution onto a flexible polyimide substrate, and the structural and morphological properties of the Pd@MoS₂ composites were investigated by relevant characterization methods. The fabricated sensors were lightweight, operating at room temperature, and had high sensitivity. The Pd@MoS₂ H₂ sensor had a sensitivity of 4.44 at 15,000 ppm, and a detection limit as low as 300 ppm.