HYDROGEN SENSOR BASED ON NICKEL/PALLADIUM-GRAPHENE NANOCOMPOSITE AND METHOD OF FABRICATING THE SAME

摘要

The present invention relates to a nickel/palladium-graphene (Ni/Pd-Gr) nanocomposite-based hydrogen sensor and a method for manufacturing the same. A nanoparticle supporting graphene (Ni/Pd-Gr) of two metals of nickel/palladium (Ni/Pd) is synthesized by a simple chemical method and the post annealing process. As a feature of a hydrogen (H_2) sensor comprising a small amount of Ni added to specific resistance type Pd nanoparticles (Pd NPs), and Pd-Gr nanoparticles, Pd NPs is synthesized by changing the molar ratio of a Ni-Pd precursor with different amounts of Ni planted in a Pd grid. As a result of the present invention, the addition of Ni indicates not only to strengthen the ability to perform a hydrogen (H_2) sensor-based Pd-Gr composite, but also to offset hysteresis behavior. H_2 can be detected to 1-1000 ppm based on a complete and quick recovery response with a relevant Ni/Pd ratio. In the optimal Ni/Pd ratio of 7% (Ni/Pd-7%), the sensor indicates to strengthen distinct sensitivity and the reaction time, and there is no hysteresis behavior. As Ni is added to Pd NPs in a hydrogen (H_2) sensor which is based on a Pd-Gr nano composite, structural stability and reliability are improved.