Adsorption of lead(II) chloride by chronoamperometric measurements

Identification of current nature by elimination voltammetry with linear scan

“…In other words, cation adsorption seems to be induced by the already existing anion adsorption, specific for halides, contrary to nitrate [33]. Easily adsorbing species, like Pb(II), shift the reduction process to negative potentials and change its mechanism [30,33,34]. The authors concluded that either a monolayer of a Pb-X-Pb-X-chain parallel to the surface, or of X-Pb-X molecules perpendicular to the surface is formed (X = Cl À , Br À or I À ).…”

Speculation on Some Effects of Complexation and Anion-Induced Adsorption on the Polarography of Indium in Acidic Halide and Thiocyanate Media

“…The first mechanism, suggested by O'Dom and Murray ( 4), assumed that one particular complex species present in the solution, MLN, adsorbed on the mercury surface to produce an adsorbed species with the same chemical composition MLN Jr Hg -> LN-1M --L --Hg [1] An alternative proposal by Anson and Barclay (5) differs from the above in that interaction with anions already adsorbed on the mercury occurs according to scheme [2] MLN Jr L --Hg--> L~M --L --Hg [2] Data supporting the second scheme as being the predominant one have been obtained for a number of metals and cations (11), although in several studies (9,10), authors have been unable to choose between reactions [1] and [2]. The bulk of evidence therefore indicates at least that the second scheme is the more usual one.…”

“…A number of recent publications have dealt with the adsorption of metal complexes on mercury electrodes from solutions containing anions that also adsorb on mercury (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12). Several different experimental techniques have been used in these studies including such methods as chronocoulometry and chronopotentiometry.…”