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Characterisation and Modeling of Conducting Composite Electrodes

2008; American Chemical Society; Volume: 112; Issue: 25 Linguagem: Inglês

10.1021/jp711366u

1932-7455

Hong Zhao, Danny O’Hare,

Electrochemical sensors and biosensors

We have carried out a systematic investigation of the surface electrochemistry of glassy carbon−epoxy composite electrodes. Key findings include the following: the distributed resistance in electrodes results in shifts in E1/2, and the overlap of diffusion layers on electrode surface leads to a potential dependent il. Two different types of carbon fiber array electrodes were studied for comparison with glassy carbon−epoxy electrodes. A numerical model was built, and results show shifts in E1/2 and sloping il which are in good qualitative agreement with experiments.