Redox reactivity at silver microparticle—glassy carbon contacts under a coating of polymer of intrinsic microporosity (PIM)

Daping He, Erwan Rauwel, Richard Malpass-Evans, Mariolino Carta, Neil B. McKeown, Demudu Babu Gorle, M. Anbu Kulandainathan, Frank Marken

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Silver microparticles (ca. 1 μm average size clustered into cage-like aggregates of 10–20 μm diameter) are shown to adhere to a glassy carbon electrode surface to give voltammetric current responses, which are considerably enhanced/stabilised when applying a coating with a molecularly rigid polymer of intrinsic microporosity (PIM-EA-TB). In preliminary voltammetric experiments characteristic Ag(0/I) surface oxidation and back-reduction processes are observed in aqueous phosphate buffer (associated with silver phosphate layer formation on the silver surface). In contrast to the oxidation, which is dominated by a nucleation process causing a sharp well-defined current signal, for the back-reduction stochastic current responses are observed possibly associated with density fluctuations in the surrounding liquid phase (“Brownian activation”) as an essential part of the mechanism of conversion of surface-oxidised silver back to silver metal.
Original languageEnglish
Pages (from-to)2141-2146
JournalJournal of Solid State Electrochemistry
Volume21
Issue number7
Early online date16 Feb 2017
DOIs
Publication statusPublished - 1 Jul 2017

Fingerprint Dive into the research topics of 'Redox reactivity at silver microparticle—glassy carbon contacts under a coating of polymer of intrinsic microporosity (PIM)'. Together they form a unique fingerprint.

  • Projects

    Metal-Organic Redox Frameworks (MOFs) for Photochemical Textile Processes

    Marken, F.

    The British Council

    1/04/1431/08/16

    Project: Central government, health and local authorities

    Equipment

  • Cite this