Collection efficiency, double channel electrodes

First-order collection efficiencies at the double channel electrode... 

In this section, the discussion centres on the application of double channel electrodes in the study of electrode reaction mechanisms under conditions of laminar flow. (The modifications necessary to what follows when turbulent flow operates can be found in Sect. 6.2.) When employed in this way, the upstream (generator) electrode produces the species of interest, which is then detected on the downstream electrode. This procedure is illustrated schematically in Fig. 37. In general, the detector electrode is held at a potential at which the destruction of the species produced upstream is diffusion-controlled. Kinetic and mechanistic information about the electrogenerated species is then available from "collection efficiency , N, measurements, given by... 

Steady-state collection efficiencies as a function of double channel electrode geometry when the product of the generator electrode reaction is kinetically stable on the channel electrode timescale... 

P.R. Unwin. The ECE-DISPl problem—General resolution via double channel electrode collection efficiency measurements. J Electroanal Chem. 297 103 (1991). 

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