Kinetics and mechanism of the hydrogen discharge on Ti in HCl-DMSO solutions |
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Authors: | P.J. Aragon R.E. Araujo |
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Affiliation: | Facultad de Ciencias, Departamento de Quimica, Universidad de Los Andes, Merida, Venezuela |
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Abstract: | The kinetics of hydrogen discharge in solutions of HCl-DMSO is investigated within 10?3 1 N HCl concentrations, in the presence of KClO4 as supporting electrolyte. The cathodic slope is 0·120 V/decade for all solutions. The electrochemical reaction order with respect to the hydrogen ion concentration at E = ?0·6 V is found to be 0·52. The stoichiometric number is practically equal to 2. The experimental activation energy is 11·2 kcal/mole.The cathodic process is interpreted with the discharge reaction as rate determining step, followed by the adatom recombination reaction. |
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