Abstract
Differential capacity of polycrystalline silver electrode in aqueous KF solutions containing thiourea (TU) of concentrations from 0.001 to 0.25 mol dm −3 has been measured by the previously described potentiostatic method [M. Brzowstowska-Smolska et al., J. electroanal. Chem. 89, 389 (1978)]. The TU adsorption is discussed on the basis of differential capacity results and the potential shift caused by TU concentration changes. Furthermore, the surface pressure has been obtained by integration of the Δ E σ M vs σ M curves for a number of TU concentrations.
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