A WALL-JET ELECTRODE REACTOR AND ITS APPLICATION TO THE STUDY OF ELECTRODE-REACTION MECHANISMS .2. A GENERAL COMPUTATIONAL METHOD FOR THE MASS-TRANSPORT PROBLEMS INVOLVED

A numerical computational method to solve the problems of mass transpo rt to the impinged surface of a wall-jet electrode reactor is put forw ard, thus providing the necessary tool for a quantitative electrochemi cal investigation of the mechanism of electrode processes, using a wal l-jet electrode reactor as a hydrodynamic electrode system. The comput ational method is based on a second order-correct implicit finite diff erence approach and a coordinate transformation making a simple Cartes ian space discretization compatible with efficient computing, thus all owing the computations to be performed on a personal computer. The com putational approach is demonstrated through calculation of a single st ep chronoamperometric transient for a simple one electron transfer rea ction and shown to be accurate by comparing the computed with experime ntally determined current transients using as a model reaction the red uction of ferricyanide ions at a platinum electrode surface from a 0.0 1M K3Fe(CN)(6)-0.01M K4Fe(CN)(6) solution containing 1M KCl as support ing electrolyte