| Abstract
| - The study provides a model for the effect on electrochemical processes of a magnetic field that is directedperpendicular to a planar electrode surface. The analysis assumes the formation of a hydrodynamic boundarylayer of the fluid motion that is generated above a semi-infinite electrode as a result of magnetic force action.For a uniform magnetic field, the model predicts the decrease of the diffusion boundary layer thickness uponincreasing either the magnetic field strength, B, or the reagent bulk concentration, C, with the power dependencecorresponding to C4/3B2/3. The limiting current density, iL, is formulated as iL ≈ 0.5χm1/3(μoρ)-1/3R5/3D5/9ν-2/9nFC4/3B2/3.This permits semiquantitative interpretation of the enhanced mass transfer at electrode surfaces forelectrochemical reactions and predicts a magnetic field effect on mass transfer-limited heterogeneous reactionsof magnetic species. The results imply that the perpendicular magnetic field will affect any mass transportlimited transformation involving paramagnetic species at flat surfaces.
|
