Charge neutralization process of mobile species developed during potentiodynamic conditions. Part 1: Theory

FERNANDO GARAY; CESAR A. BARBERO

Elsevier

Lugar: Amsterdam; Año: 2008 vol. 624 p. 218 - 218

span style="font-size: 12pt; font-family: Times;">This is theoretical work in which a general expression for the diffusion and migration contribution of electroactive and non-electroactive species is provided. The model is employed to simulate concentration and concentration gradient profiles of electroactive and non-electroactive species, driven by an electrochemical process under potentiodynamic conditions. The effects of experimental parameters such as diffusion coefficients, charges of redox species and supporting electrolyte (SE) ions are examined and discussed. The curves included in this work are mostly related to systems where electroactive and non-electroactive species have different diffusion coefficients. The proposed model can explain extreme cases related to asymmetrical diffusion of involved species that are more difficult to understan