engleski

Measurement of Surface Potential at Silver Chloride Aqueous Interface with Single-Crystal AgCl Electrode

The surface potential at the silver chloride aqueous interface was measured by means of a single-crystal silver chloride electrode (SCr-AgCl). The measurements were conducted by titration of the KCl solution with AgNO3, and vice versa. The SCr-AgCl electrode potentials were converted to surface potentials  0 by setting zero at the point of zero charge at pCl = 5.2. The  0(pCl) function was linear, with a slope 12 per cent lower with respect to the Nernst equation. It was demonstrated that the surface potential at the silver halide aqueous interface could be interpreted by means of the Surface Complexation Model, originally developed for metal oxides.

Silver chloride; surface potential; surface complexation model; single crystal electrode

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