A LINEAR SWEEP VOLTAMMETRY THEORY FOR IRREVERSIBLE ELECTRODE-REACTIONS WITH AN ORDER OF ONE OR HIGHER .2. EXPERIMENTAL RESULTS

Applying a new theory developed in a previous paper, linear sweep voltammetry was used to determine the reaction order and the transfer coefficient for the oxidation reaction of SO2 to H2SO4, using platinum and lead oxide as substrates. Solutions containing up to 50 weight percent H2SO4 were studied. Results show that the oxidation reaction is of the second order when lead oxide is used and of the first order with the platinum substrate. These observations will be used in a subsequent paper to determine the mechanism involved at the lead oxide substrate. The results were verified by measuring hydrogen cathodically evolved and comparing it with the values calculated in this study. Thus, the present work shows the applicability of the new generalized theory of linear sweep voltammetry for irreversible electrode processes.