Effect of palladium and its nanogeometry on the redox electrochemistry of tetracyanoquinodimethane modified electrode; application in electrochemical sensing of ascorbic acid

The current work reports the effect of palladium nanoparticles and their nanogeometry on redox electrochemistry tetracyanoquinodimethane (TCNQ) modified electrodes. Palladium were prepared with different concentrations 3-aminopropyltrimethoxysilane calcination at 600 °C to yield PdNP-1 PdNP-2 average size 1 µm 12 nm, respectively. characterized by TEM, XRD, AFM techniques. electrochemical excellence ascorbic acid was resoluted using cyclic voltammetry amperometry, impedance spectroscopy, differential pulse voltammetry. A limit detection (LOD) found be 51.61, 44.38 30.10 µM over a linear range from 50 625 for CPE/TCNQ, CPE/TCNQ-PdNP-1, CPE/TCNQ-PdNP-2, respectively, determined amperometric analysis pH 7. synergistic π* orbital TCNQ played an important role in enhancement catalytic activity electrode. electrode showed good sensitivity, stability, reproducibility which confirmed voltammetry, analysis. charge transfer resistance value also indicated that hads electrocatalytic activity.