Experimental and Theoretical Study of Concentration Distributions in a Model Pore Electrode: I . Measurement of Two‐Dimensional Concentration Gradients in a Zinc Model Pore

Abstract

The optical probe beam deflection technique has been employed to study two‐dimensional concentration gradients within the electrolyte of a zinc model pore. The model pore cell constructed for this study retains the small, confined geometry and two‐dimensional character of an actual pore within a porous zinc electrode. Refractive index gradients in the direction of the model pore axis showed that the concentration of zincate ion reaches a maximum between the model pore mouth and a position one‐fourth of the distance toward the pore root during the anodic oxidation of the zinc electrode. Also, the variation in the refractive index gradient normal to the electrode along the length of the zinc anode allowed us to calculate the local current density within the model pore.