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- W3181036379 abstract "• Cationic/anionic response of GC/PEDOT/PSS depends on the conditioning in Ag. • Cationic response in salts where anions do not form sparingly soluble silver salts. • Anionic response in salts where anions do form sparingly soluble silver salts. • Close to nernstian cationic response for GC/PEDOT/PSS/K-ISM. • Excellent agreement with thermodynamic data. The potentiometric response of the conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) doped with poly(styrenesulfonate) (PSS) deposited on glassy carbon (GC), i.e. GC/PEDOT(PSS), was studied before and after conditioning in silver nitrate solution. The deposition of silver in the PEDOT(PSS) film was characterized by SEM/EDAX and cyclic voltammetry. The potentiometric response of the Ag-conditioned GC/PEDOT(PSS) electrode was dependent on the nature of the anion present in the calibration solutions. In cases where anions do not form sparingly soluble silver salts, a cationic response was observed for GC/PEDOT(PSS), as expected. However, an anionic response was observed in solutions containing anions ( X − ) that can form sparingly soluble salts with silver ions (AgX). Furthermore, the measured potentials in X − solutions followed the solubility product values of AgX. The agreement between the experimental and thermodynamic data was excellent. This validates the hypothesis of equilibrium existing between Ag + ions in the polymer film (due to conditioning) and Ag + ions in the solution. The Ag-conditioned GC/PEDOT(PSS) electrode covered with a potassium ion-selective membrane (GC/PEDOT(PSS)/ K + -ISM) showed a cationic response in KCl solutions with close to Nernstian slope value." @default.
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- W3181036379 date "2021-09-01" @default.
- W3181036379 modified "2023-09-24" @default.
- W3181036379 title "Dependence of the potentiometric response of PEDOT(PSS) on the solubility product of silver salts" @default.
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- W3181036379 doi "https://doi.org/10.1016/j.electacta.2021.138854" @default.
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