Palladium-Nickel nanoparticles decorated on Functionalized-MWCNT for high precision non-enzymatic glucose sensing

In this study, we report the synthesis and application of palladium-nickel nanoparticles decorated on functionalized-multiwall carbon nanotube Pd-Ni@f-MWCNT and employed as a sensitive non-enzymatic electrochemical glucose sensor. The composition and crystal structure was characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and Raman spectroscopy. The surface morphology of Pd-Ni@f-MWCNT was investigated by a transmission electron microscopy (TEM). The electrochemical response of the Pd-Ni@f-MWCNT to glucose was examined via the cyclic voltammetry. Results revealed that the prepared electrode exhibits high electrocatalytic activity for the oxidation of glucose into gluconolactone. The ampero-metric response of the Pd-Ni@f-MWCNT electrode to glucose was investigated at a potential of 0.5 V that demonstrated an extended linear range of from 0.01 to 1.4 mM, very low detection limit of 0.026 mu M, very high sensitivity at 71 mu A mM(-1) cm(-2) , as well as good reproducibility, high stability and applicability for the real sample analysis. The reliability of the developed sensor was verified by comparison with a commercially available glucometer. The obtained results indicate that Pd-Ni@f-MWCNT is a promising candidate for electrochemical glucose sensing.