Transition Metal-Substituted Krebs-Type Polyoxometalate-Doped PEDOT Films
| Autor: | Gordon Armstrong, Fathima Laffir, Bushra Ali, Timothy McCormac, Rashda Naseer, Calum Dickinson, Lekshmi Kailas |
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| Rok vydání: | 2019 |
| Předmět: |
Conductive polymer
Materials science Inorganic chemistry 02 engineering and technology Surfaces and Interfaces 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences Redox 0104 chemical sciences Dielectric spectroscopy X-ray photoelectron spectroscopy Transition metal PEDOT:PSS Polyoxometalate General Materials Science 0210 nano-technology Spectroscopy |
| Zdroj: | Langmuir : the ACS journal of surfaces and colloids. 35(34) |
| ISSN: | 1520-5827 |
| Popis: | The transition metal-substituted Krebs-type polyoxometalates (POMs) [Sb2W20M2O70(H2O)6]n−, M = Fe(III), Co(II), or Cu(II), were surface immobilized within the conducting polymer 3,4-ethylenedioxythiophene (PEDOT) on glassy carbon electrode surfaces. The immobilized films of different thicknesses were characterized by electrochemical and surface-based techniques. The inherent redox activity for the Krebs-type POMs, [Sb2W20M2O70(H2O)6]n−, M = Fe(III), Co(II), or Cu(II), that were observed in the solution phase were maintained in the polymeric PEDOT matrix. The resulting films were found to be extremely stable toward redox switching between the various POM-based redox states. The films exhibited pH-dependent redox activity and thin layer behavior up to 100 mV s–1. The films were found to be highly conductive through the employment of electrochemical impedance spectroscopy. Surface characterization of the films was carried out by X-ray photoelectron spectroscopy, atomic force microscopy, and scanning electron... |
| Databáze: | OpenAIRE |
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