Mercury electrodes anion-induced adsorption

There are numerous analytically oriented studies developed upon adsorption coupled electrode reactions (2.144) and (2.146), which are summarized in the Sect. 3.1. For the purpose of verification of the theory, electrode mechanisms including reductions of a series of metallic ions in the presence of anion-induced adsorption [110], as well as electrode mechanisms at a mercury electrode of methylene blue [92], azobenzene [79], midazolam [115], berberine [111], jatrorubine [121], Cn(lI)-sulfoxine and ferron complexes [122], Cd(II)- and Cu(II)-8-hydoxy-qninoline... 

Complexes of metal ions with surface-active ligands can be adsorbed on the surface of mercury electrodes [54, 58-60]. The adsorption of labile metal complexes with inorganic ligands is called anion-induced adsorption [61-64]. The adsorption is either direct ... 

Electrochem. Soc., 116 (9), 1208-1212. Barclay, D.J. and Anson, EC. (1970) Some aspects of anion-induced adsorption of white metal cations on mercury. / ElectroanaL Chem., 28 (1), 71-79. Damaskin, B.B., Petrii, O.A., and Batrakov, V.V. (1971) Adsorption of Organic Compounds on Electrodes, Plenum Press, New York. 

It was found that the dissociation rate constant is dependent on the concentration of the complexing agent L if a hanging mercury drop electrode was used. For small values of c, kd = 90s At Nation coated mercury film electrode the value of k is lower, k = 6 s . The difference has been explained by the assumption of adsorption of proline anions on the bare mercury electrode surface. This effect induces the acceleration of the dissociation process. 

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