An Electrochemical Ascorbic Acid Sensor Constructed by Ferrocene Palladium Nanoparticles Modified Graphite

Abstract

This paper discusses how palladium affects the redox electrochemistry of ferrocene. The amount of palladium present, as well as its geometrical distribution, has been found to have a significant impact on the redox electrochemistry of ferrocene. Significant results were obtained with the Fc-based electrode, and startling results were obtained with the Pd-modified Fc-based electrode, as confirmed by amperometry titration which demonstrated a significantly higher current when using palladium nanoparticles modified ferrocene-based electrode. Electrochemical impedance spectroscopy has also been investigated, which confirms that a PdNPs modified Fc-based electrode with low charge transfer resistance and fast electron transfer, and high sensitivity toward ascorbic acid. Cyclic voltammetry and transmission electron microscopy have been used to characterize the nanomaterial. For the purpose of detecting ascorbic acid, the impact of palladium nanostructures on the oxidation and reduction electrochemistry of Fc is investigated. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.