Functionalized Carbon Nanotubes for Chemical Sensing: Electrochemical Detection of Hydrogen Isotopes

In this study, we propose a palladium-functionalized CNT composite working as sensitive material to evaluate the deuterium concentration in aqueous samples. The was prepared by deposition of Pd nanoparticles onto MWCNT–OH micellization process. A modified electrode drop casting 60 μL Pd-decorated MWCNT suspension on clean glassy carbon surface. sensing behavior investigated series deuterium-enriched solutions ranging from 25 10,000 ppm. We performed cyclic voltammetry and impedance spectroscopy studies process is quasi-reversible with reduction curve more pronounced than oxidation curve, which indicates low tendency desorption for hydrogen atoms.