International Journal of Electrochemical Science · 2012 · 12 citations · 40 references
Natural SciencesChemistryMaterials ScienceElectrochemistrySurface ChemistrySurface ScienceElectroanalytical ChemistryElectrochemical CellsElectrochemical ThermodynamicsElectrode MaterialsElectrode PotentialsSurface PhysicsAdsorption At Electrochemical InterfacesElectrochemical BehaviorElectrochemical CharacterizationElectrochemical MeasurementsOxidationSurface Adsorption ThermodynamicsSurface CoverageVoltammetry
Electrochemical behavior of AgCu50 alloy (50 mass.% Ag + 50 mass.% Cu) was investigated by cyclic voltammetry and potentiostatic methods in 0.1 mol/dm3 NaOH solution containing BTA in different concentrations (0.00005 – 0.01 mol dm-3). Potentiostatic oxidation was followed by SEM and EDS analysis of electrode surface. The presence of benzotriazole influenced the potential and the hight of current peaks. Increasing of BTA concentration leads to the decreasing of current in investigated potential range. Heights of current peaks point at electrode surface coverage with adsorbed BTA molecules. Based on the assumption that the adsorption was governed by Langmuir isotherm and using the dependence C/θ = f(CBTA), the calculated Gibbs energy of adsorption of BTA on investigated AgCu50 alloy was -27 kJ mol-1.
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