HYDRODYNAMIC VOLTAMMETRY WITH MICROELECTRODES - CHANNEL MICROBAND ELECTRODES - THEORY AND EXPERIMENT

Theory is reported that predicts the mass-transport limited current fl owing at a microband electrode located in a rectangular channel throug h which solution is. pumped under laminar flow conditions. The effect of electrode size and solution flow rate is quantified and the relativ e roles of axial diffusion and convective mass transport are identifie d. Theory is found to be in excellent agreement with experiments condu cted on the reduction of p-chloranil and the oxidation of ferrocene by using gold channel microband electrodes.