Electrochemistry of Redox Active Ferrocene Covalently Attached to Glassy Carbon Electrodes

Huffman, Brittany L.; Donley, Carrie L.; Dempsey, Jillian L.

doi:10.1149/1945-7111/ad0bac

Title: Electrochemistry of Redox Active Ferrocene Covalently Attached to Glassy Carbon Electrodes

Journal Article · 06 December 2023 · Journal of the Electrochemical Society

DOI: https://doi.org/10.1149/1945-7111/ad0bac · OSTI ID:2333087

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University of North Carolina at Chapel Hill, NC (United States); University of North Carolina at Chapel Hill
University of North Carolina at Chapel Hill, NC (United States)

Formation of well-ordered redox active monolayers is desirable for systematic study of electron transfer for sensor applications and generation of tailored hybrid materials. We have covalently attached 6-bromohexylferrocene (Fc(CH₂)₆Br) to glassy carbon electrodes through a Grignard reaction and used cyclic voltammetry to characterize interfacial electron transfer and probe disorder in these modified electrodes. X-ray photoelectron spectroscopy (XPS) and cyclic voltammetry confirmed attachment of the expected Fe(II) species and reversible electron transfer is observed. However, the full width at half max of the cyclic voltammogram features deviates from the ideal value of 90.6 mV and varies with surface coverage, indicating a disordered surface. As a result, we determine this disorder arises from phase segregation where some domains have a high loading of the hexylferrocene chains while others have a lower loading of hexylferrocene resulting in different local environments that are distinguishable by cyclic voltammetry.

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Research Organization:: University of North Carolina at Chapel Hill, NC (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0015303

OSTI ID:: 2333087

Journal Information:: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 12 Vol. 170; ISSN 0013-4651

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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