Influence of the Electrode Material on the Electrochemical Behavior of Carbon Paste Electrodes Modified with Meldola Blue and Methylene Green Adsorbed on a Synthetic Zeolite

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Abstract

Carbon paste electrodes modified with a phenoxazine derivative, Meldola blue, and a phenothiazine derivative, methylene green, both strongly adsorbed on a synthetic zeolite were investigated using either glassy carbon powder (Sigradur K, SK) or single-walled carbon nanotubes (SWCNT) as conductive electrode material. In the case of SWCNT based electrodes, the formal potential of both mediators was pH dependent, as expected for a redox process involving proton transfer. In contrast, the formal potential of both mediators of SK based modified electrodes was practically insensitive to pH. This behavior is discussed in terms of interactions existing in the heterogeneous system mediator-zeolite-electrode material.

Detaljer

Författare
  • Delia Gligor
  • Izabella Craciunescu
  • Ionel Catalin Popescu
  • Lo Gorton
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Analytisk kemi

Nyckelord

Originalspråkengelska
Sidor (från-till)509-512
TidskriftElectroanalysis
Volym22
Utgåva nummer5
StatusPublished - 2010
PublikationskategoriForskning
Peer review utfördJa