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Increasing Applications of Graphite Thermoplastic Electrodes with Aryl Diazonium Grafting

Abstract : Carbon composite thermoplastic electrodes (TPEs) consist of graphite and thermoplastic made using an easy, solvent-assisted fabrication. TPEs have the advantages of high conductivity, good electron transfer kinetics, low cost, reusability, and easy patterning, but have only been used with aqueous solvents due to solvent compatibility with the poly(methyl methacrylate) (PMMA) template. The limited solvent compatibility hinders the application range and surface modifications. Here, cyclic olefin copolymer (COC) TPEs in glass templates that are compatible with additional solvents are presented. TPEs are grafted with aryl diazonium salts in acetonitrile, showing covalent surface TPE modification for the first time. Further investigation is carried out with scanning electrochemical microscopy (SECM). The TPEs are post-functionalized with a ferrocene moiety via click chemistry. The diazonium electrografting and click chemistry modifications open up future studies and broader applications of TPEs.
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Submitted on : Tuesday, November 19, 2019 - 2:56:22 PM
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Kathleen E. Berg, Yann R. Leroux, Philippe Hapiot, Charles S. Henry. Increasing Applications of Graphite Thermoplastic Electrodes with Aryl Diazonium Grafting. ChemElectroChem, Weinheim : Wiley-VCH, 2019, 6 (18), pp.4811-4816. ⟨10.1002/celc.201901048⟩. ⟨hal-02359966⟩

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