In this work, the characterization and the electroanalytical applications of antimony tin oxide (ATO) – Prussian blue (PB) screen printed electrodes (SPE) are presented. The ATO conducting particles have been used recently in the development of screen-printed electrodes due to their excellent spectroelectrochemical properties. PB is a transition metal hexacyanoferrate with high electrocatalytic properties towards various biologically active compounds like hydrogen peroxide, besides its outstanding electrochromic properties. A combination of ATO and PB ingredients into a screen-printing paste provided a versatile and cost-effective way in the development of novel electrode materials for electrochemical sensing. The ATO-PB electrode material displayed good electrochemical properties demonstrated by means of cyclic voltammetry and electrochemical impedance measurements. In addition, the PB provided a high selectivity towards potassium ions in solution due to its zeolitic structures and excellent redox behavior. The cyclic voltammetric responses recorded at the ATO-PB-SPE device in the presence of potassium ions revealed a linear dependence of the cathodic peak current and cathodic peak potential of the Prussian blue/Everitt’s salt redox system on the potassium concentrations ranging from 0.1 to 10 mM. This finding could be exploited in the development of an electrochemical sensor for electro-inactive chemical species.
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Antimony tin oxide – Prussian blue screen-printed electrodes for electrochemical sensing of potassium ions
Published:
01 July 2021
by MDPI
in The 1st International Electronic Conference on Chemical Sensors and Analytical Chemistry
session Electrochemical Devices and Sensors
Abstract:
Keywords: antimony tin oxide; Prussian blue; screen-printed electrodes; cyclic voltammetry; electrochemical impedance spectroscopy; electrochromic material; electrochemical sensing