TY - JOUR
ID - 39956
TI - A Model of Irreversible Electro-Oxidation Inhibited by Either Adsorption or Surface Complexation of the Product
JO - Analytical and Bioanalytical Electrochemistry
JA - ABEC2020
LA - en
SN -
AU - LovriÄ‡, Milivoj
AD - DivkoviÄ‡eva 13, Zagreb 10090, Croatia
Y1 - 2020
PY - 2020
VL - 12
IS - 5
SP - 688
EP - 699
KW - Cyclic voltammetry
KW - Inhibition of electron transfer
KW - Surface complexation
KW - Numerical integration
KW - theoretical model
DO -
N2 - Theoretical models of irreversible electro-oxidation of dissolved reactant giving dissolved product on the stationary planar electrode are developed for the conditions of staircase cyclic voltammetry. In the first model it is assumed that the product is adsorbed on the electrode surface and that the adsorbate prevents the transfer of electrons. In the second model it is assumed that the electrode surface is reversibly covered by the oxide monolayer and that the product of electro-oxidation forms the inhibiting complex with the oxide. The calculations were performed by the transformation of transport defining differential equations into integral equations and by the numerical solution of the latter. The described mechanisms are investigated in order to analyse the relationship between the second anodic peak in cyclic voltammetry and the type of inhibition. It is shown that anomalous responses appear only if the electro-oxidation is inhibited by the surface complex of its product and the electrode oxide. The condition is that the electrode oxidation is reversible and that the complex disappears when the oxide is reduced.
UR - http://www.abechem.com/article_39956.html
L1 - http://www.abechem.com/article_39956_e3243ed5f47a659eeb0682c8ea14315f.pdf
ER -