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 language | English |
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Pages (from-to) | 195-201 |
Number of pages | 7 |
Journal | Electrochimica Acta |
Volume | 160 |
Early online date | 24 Jan 2015 |
DOIs | |
Publication status | Published - 1 Apr 2015 |
Keywords
- carbohydrate
- EC'mechanism catalyst
- electrocatalysis
- fuel cell
- heterogenisation
- multi-electron
- sensor