Oxford's BegBroke Science Park

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Hydrodynamic Voltammetry

The transport-limited current at microchannel electrodes may be quantitatively predicted by using the hopscotch algorithm to solve the mass-transport equation descibing the transport of electroactive material by convection and diffusion in a direction both axial and normal to the electrode surface. In particular, axial diffusion effects are found to be substantial for electrodes of micrometer dimensions in length, and the result of such effects is to propagate concentration depletion effects dramatically upstream of the electrode. The theoretical predictions were found to be in quantitative agreement with experiment.

Peter Dobson, Hydrodynamic Voltammetry with Microelectrodes. Channel Microband Electrodes: Theory and Experiment, J. Phys. Chem. 1993,97, 10410-10415