Self-Induced Convection at Microelectrodes via Electroosmosis and Its Influence on Impact Electrochemistry
Taghi Moazzenzade, Xiaojun Yang, Luc Walterbos, Jurriaan Huskens, Christophe Renault, Serge G. Lemay
Abstract
Faradaic reactions at low supporting electrolyte concentrations induce convection via electroosmotic flows. Here we combine finite-element simulations and electrochemical measurements on microparticles at ultramicroelectrodes to explore this effect. We show that convection becomes the dominant form of mass transport for experiments at low salt concentrations, violating the common assumption that convection can be neglected.
Topics & Concepts
ChemistryConvectionMicroelectrodeElectrochemistryElectrolyteMass transportChemical physicsMechanicsElectrodePhysical chemistryEngineering physicsEngineeringPhysicsElectrochemical Analysis and ApplicationsAnalytical Chemistry and SensorsMicrofluidic and Capillary Electrophoresis Applications