Fabrication of electrodeposited palladium thin-film electrodes for electrochemical sensing of acetaminophen.

In recent years, the researchers focused on making eco-friendly carbon cloth electrodes, which are more flexible, using ammonia complex without any surfactant templates for electrodeposition. Herein, palladium (Pd) electrodeposition was carried out on carbon cloth (CC) under galvanostatic conditions and their electrochemical sensing applications were explored. Further, cathode current efficiency and rate of palladium film growth were calculated using Faraday’s law of electrolysis. The quality of the Pd deposit was visually collated. The surface morphology, crystalline structure, topography, elemental composition, and oxidation state of elements were analyzed by respective characterization techniques, such as FESEM, XRD, AFM, and XPS. The XRD characterization studies revealed crystalline size ~ 7 nm of Pd deposits on carbon cloth. The electrochemical sensing performance toward acetaminophen (ACAP) in 0.1 M phosphate buffer solution at neutral pH (pH 7.0) was evaluated using cyclic voltammetry and differential pulse voltammetry. PdCC-modified electrode shows an enhanced electrocatalytic behavior for the oxidation of ACAP with a linear range of 5–2000 μ mol L⁻¹, limit of detection of 3.14 μ mol L⁻¹, and limit of quantification of 9.55 μ mol L⁻¹. The PdCC-modified electrode has achieved good stability, reproducibility, reusability, and anti-interference ability toward the sensing of ACAP. The practical feasibility of the proposed sensor was successfully demonstrated using real-water samples. [ABSTRACT FROM AUTHOR]