Abstract
Given the flammable and explosive nature of hydrogen, its detection at low temperatures and even at room temperature is particularly important. In this study, Pd/Pt bimetallic nanoparticles supported on hollow indium oxide spheres were synthesized through a simple hydrothermal and reduction method for hydrogen detection at room temperature. Various characterization techniques were employed to confirm the successful preparation of the bimetallic and indium oxide materials. The bimetallic material exhibited stronger catalytic activity, resulting in significant enhancement in hydrogen detection capabilities compared to indium oxide alone. Test results also demonstrated the excellent catalytic performance of the bimetallic material, with the sensor showing an astonishing response of 29.8 to 100 ppm hydrogen at room temperature, along with positive selectivity and repeatability. The enhanced response of the bimetallic nanoparticles in hydrogen detection can be attributed to the synergistic effect of the bimetallic material and the increased number of active metal sites.
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