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Potentiometric studies show the interaction between the copper surface electrode and propanol alcohol (H3C-CH2-CH2OH), allyl alcohol (H2C=CH-CH2OH) and propargyl alcohol (HC≡C-CH2OH). From them, only allyl alcohol and propargyl alcohol change the value of the electrode potentials, when the organic compounds are added to the solutions. The potential shifts suggest a strong interaction, with a chemical and stable adsorption of the alcohols on the surfasse electrode. The electrode potentials change quickly in the presence of the alcohols and depend on the concentration that is added. The adsorption of the alcohols independs on the acid concentration of the solution but it depends on the dissolved oxygen concentration. The shifts of the electrode potentials are lower in aerated solutions than in deaerated solutions, with both alcohols. The potential-time curves at 65ºC shown that allyl alcohol adsorption is weaker at high temperatures. However, the propargyl alcohol adsorption independs on the temperature of the solutions.

Estudos potenciométricos da adsorção de álcoois insaturados sobre o eletrodo de cobre em meio H2SO4 diluído