Highly linear and ultra-fast Pd hydrogen gas sensor exploiting reliable nanowire fabrication

Abstract

Hydrogen has been attracted as an eco-friendly energy source, however, careful management is required because of its high explosiveness. In particular, palladium is widely used as a sensing material for hydrogen sensors thanks to the advantage of selectively reacting with hydrogen. When reacting with high concentration of hydrogen, phase transition occurs in palladium hydride along with volume expansion and the saturation of hydrogen in palladium, resulting in low linearity and durability. In this study, a high-linearity, high-speed operation, and high-durability hydrogen sensor was proposed and verified through engineering a palladium nanostructure.