HYDRODYNAMIC MICROELECTRODES - THE MICROSTRIP ELECTRODE - THEORY AND EXPERIMENT

Theory is presented to predict the mass transport limited current flow ing at a hydrodynamic microstrip electrode located in a rectangular fl ow cell under steady state and chronoamperometric conditions. The infl uence of electrode size is quantified with the relative effects of lat eral diffusion, normal diffusion, and axial convection identified. The ory is found to be in good agreement with experimental measurements co nducted using the oxidation of tris(4-bromophenyl)amine at a platinum microstrip electrode. The microstrip electrode is seen to exhibit cons iderably enhanced mass transport characteristics over its macroelectro de equivalent and consequently is proposed as a new tool for the study of electrode reaction mechanisms.