Fast-scan cyclic voltammetry and scanning electrochemical microscopy studies of the pH-dependent dissolution of 2-electron mediators immobilized on zirconium phosphate containing carbon pastes

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Abstract

A detailed study is presented on the leaking of two different 2-electron-transfer redox mediators from zirconium phosphate-modified carbon-paste electrodes. Two redox mediators commonly used in bioelectrochemistry, viz. methylene green and riboflavin, were adsorbed on zirconium phosphate and further integrated into carbon paste. Fast scan cyclic voltammetry and scanning electrochemical microscopy were used to characterize the leakage of these redox mediators at different pH conditions. It could be shown that an exposure to acidic pH-values significantly increased the rate of their leakage from the mediator-zirconium phosphate-modified carbon paste, whereas a tight adsorption was observed at neutral pH.

Detaljer

Författare
  • Florentina Munteanu
  • M Mosbach
  • A Schulte
  • W Schuhmann
  • Lo Gorton
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Analytisk kemi

Nyckelord

Originalspråkengelska
Sidor (från-till)1479-1487
TidskriftElectroanalysis
Volym14
Utgåva nummer21
StatusPublished - 2002
PublikationskategoriForskning
Peer review utfördJa