The theory of electrodeposition in the presence of forced convection: Transport controlled nucleation of hemispheres

A new equation to describe the diffusion controlled nucleation of hemispherical centres under conditions of forced convection is derived, in a manner similar to that of the Scharifker and Mostany equation (J. Electroanal. Chem. 177 (1984) 13). It has been shown that the transients measured under these conditions should show a monotonically rising transient, followed by convergence to a limiting current. The accuracy and validity of the model is tested by comparison with experimental data obtained using a 5 mM Co/Co2+ system, sonicated at 66 W cm-2. Excellent fits are obtained, and the parameters derived are in agreement with those derived from independent experiments. © 2002 Elsevier Science B.V. All rights reserved