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

3 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

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microporosity
Microporosity
glassy carbon
Glassy carbon
microparticles
Silver
Polymers
reactivity
silver
coatings
Coatings
polymers
phosphates
Phosphates
Oxidation
oxidation
Buffers
Nucleation
Metals
Chemical activation

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Redox reactivity at silver microparticle—glassy carbon contacts under a coating of polymer of intrinsic microporosity (PIM). / He, Daping; Rauwel, Erwan; Malpass-Evans, Richard; Carta, Mariolino; McKeown, Neil B.; Gorle, Demudu Babu; Anbu Kulandainathan, M.; Marken, Frank.

In: Journal of Solid State Electrochemistry, Vol. 21, No. 7, 01.07.2017, p. 2141-2146.

Research output: Contribution to journalArticle

He, Daping ; Rauwel, Erwan ; Malpass-Evans, Richard ; Carta, Mariolino ; McKeown, Neil B. ; Gorle, Demudu Babu ; Anbu Kulandainathan, M. ; Marken, Frank. / Redox reactivity at silver microparticle—glassy carbon contacts under a coating of polymer of intrinsic microporosity (PIM). In: Journal of Solid State Electrochemistry. 2017 ; Vol. 21, No. 7. pp. 2141-2146.
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