ELECTROCHEMISTRY OF SOLVATED PROTON IN DIMETHYLSULPHOXIDE .I. CATHODIC AND ANODIC REACTIONS ON PLATINUM UNDER CONVECTIVE-DIFFUSION CONTROL

Solutions of HCl in DMSO were electrolysed using a platinum rotating disk electrode, at different concentrations of HCl in the. temperature range from 30 to 65°C. Potassium perchlorate was employed as supporting electrolyte. Hydrogen was formed in the cathodic reaction with a faradaic yield of practically 100 per cent. Hydrogen dissolved at anodic potentials when the gas saturated the solution; otherwise, more involved processes were observed. the electrode processes were under a convective-diffusion control. Applying the equations derived for the rotating disk electrode,. the diffusion coefficients of the solvated proton and molecular hydrogen were estimated and interpreted in terms of the structure of the ions in the aprotic solvent.comprising solvent participation. The kinetics of hydrogen evolution and dissolution were studied in the potential region. les coefficients de diffusion du proton solvaté et de l'hydrogène moléculaire, lesquels ont été intérpretés en relation avec la structure des ions dans le solvant aprotique. © 1969.