Electrocatalytic carbohydrate oxidation with 4-benzoyloxy-TEMPO heterogenised in a polymer of intrinsic microporosity

Adam Kolodziej, Sunyhik D. Ahn, Mariolino Carta, Richard Malpass-Evans, Neil B. McKeown, Robert S. L. Chapman, Steven D. Bull, Frank Marken

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19 Citations (Scopus)
54 Downloads (Pure)

Abstract

The enzymeless and operationally simple electrocatalytic oxidation of carbohydrates by "heterogenised" 4-benzoyloxy-TEMPO either (i) immobilised as microcrystals at a glassy carbon electrode surface or (ii) embedded into a polymer of intrinsic microporosity (PIM-EA-TB with 1027 m2g-1 BET surface area and highly rigid framework structure) has been studied in aqueous phosphate buffer of pH 12. It is shown that in contrast to microcrystal deposits, 4-benzolyoxy-TEMPO co-immobilised within PIM-EA-TB give stable catalytic responses for both, stationary and rotating disc electrode systems and for oxidation of glucose, sorbitol, and sucrose. The rigidity and intrinsic microporosity of PIM-EA-TB allow (slow) substrate and product diffusion, whilst maintaining 4-benzoyloxy-TEMPO immobilised in active molecular form.

Original languageEnglish
Pages (from-to)195-201
Number of pages7
JournalElectrochimica Acta
Volume160
Early online date24 Jan 2015
DOIs
Publication statusPublished - 1 Apr 2015

Keywords

  • carbohydrate
  • EC'mechanism catalyst
  • electrocatalysis
  • fuel cell
  • heterogenisation
  • multi-electron
  • sensor

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