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Antimony Tin Oxide—Prussian Blue Screen-Printed Electrodes for Electrochemical Sensing of Potassium Ions
| Content Provider | MDPI |
|---|---|
| Author | Lete, Cecilia Marin, Mariana Campo, Francisco Javier del Diaconu, Ioana Lupu, Stelian |
| Copyright Year | 2021 |
| Description | In this work, the characterization and the electro-analytical 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. The potential application of the ATO-PB electrode in the electrochemical sensing of electro-active species like caffeic acid was also studied. An increase of the anodic peak current of the PB/ES redox wave in the presence of caffeic acid was observed. These results point out to the potential analytical applications of the ATO-PB electrode in the sensing of both electro-active and electro-inactive species. |
| Starting Page | 59 |
| DOI | 10.3390/CSAC2021-10639 |
| Issue Number | 1 |
| Volume Number | 5 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-07-01 |
| Access Restriction | Open |
| Subject Keyword | Analytical Chemistry Antimony Tin Oxide Prussian Blue Screen-printed Electrodes Cyclic Voltammetry Electrochemical Impedance Spectroscopy Electrochromic Material Electrochemical Sensing |
| Content Type | Text |
