Polarization curves in the ohmic controlled electrodeposition of metals

Popov, Konstantin; Živković, Predrag; Krstić, S.B.; Nikolić, Nebojša D.

doi:10.1016/j.electacta.2008.11.004

Cited by 21 publications

(32 citation statements)

References 15 publications

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“…The two-dimensional nucleation was also a characteristic of silver electrodeposition from nitrate solution [31,32], tin [33], and cadmium electrodeposition [30]. A polarization curve with an inflection point was also obtained in the case of silver electrodeposition from nitrate solution when a strong increase of current density was accompanied by the formation of dendrites [23,24], as well as in tin electrodeposition [33]. The common characteristic of these metal electrodeposition processes is their affiliation to the same group of metals, i.e., to the group of normal metals (Cd, Zn, Pb, Sn, Ag (silver nitrate solutions)) [34], which are characterized by a low melting point, T m , and a high exchange current density, i 0 .…”

Section: Resultsmentioning

confidence: 99%

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Formation of two-dimensional (2D) lead dendrites by application of different regimes of electrolysis

Nikolić

Branković

Lačnjevac

2011

J Solid State Electrochem

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Electrodeposition of lead from nitrate electrolyte in constant regimes of electrolysis was analyzed and the obtained powder lead deposits were examined by scanning electron microscopy. Polarization curve for lead electrodeposition consisted of two parts separated by an inflection point. The first part of the polarization curve was characterized by a linear dependence of the current density on overpotential. The linear part of the polarization curve corresponded to ohmic-controlled electrodeposition and single lead crystals were formed in this range of overpotentials. A rapid increase in the current density with increasing overpotential was observed after the inflection point (the second part of the polarization curve). Two-dimensional dendrites were the dominant morphological forms obtained at overpotentials and current densities belonging to the second part of the polarization curve, indicating that the rapid increase of the current density with increasing overpotential corresponded to activation controlled electrodeposition at the tips of the formed dendrites. Comparing the morphologies of the obtained lead deposits with those belonging to the same group of metals (metals characterized by a high exchange current density), such as silver, cadmium, and tin, a strong dependence between the nucleation type and the shape of dendrites for the metals belonging to the same group was established.

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Section: Resultsmentioning

confidence: 99%

“…The linear dependence of the current density on overpotential corresponds to an ohmic-controlled electrodeposition [23,24]. For sufficiently fast electrode processes (i 0 /i L ≥ 100), there is no activation or diffusion polarization before the limiting diffusion current density, i L , is reached.…”

Section: Resultsmentioning

confidence: 99%

Formation of two-dimensional (2D) lead dendrites by application of different regimes of electrolysis

Nikolić

Branković

Lačnjevac

2011

J Solid State Electrochem

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“…the electrodeposition [10][11][12][13]. The typical ohmic-diffusion and full ohmic polarization curves recorded from the solutions of different concentrations of Pb 2þ ions are shown in Fig.…”

Section: Experimental Measured Polarization Curvesmentioning

confidence: 99%

“…However, formation of individual grains or granules at low overpotentials was not possible to explain by this assumption. Recently, it was discussed [9] the linear dependence of current density on the overpotential for the fast electrochemical processes, and it was shown that this linear dependence can be ascribed to the ohmic control of the electrodeposition process [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

The Cathodic Polarization Curves in Electrodeposition of Metals

Popov

Djokić

Nikolić

et al. 2016

Morphology of Electrochemically and Chemically Deposited Metals

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“…In fact, several metal ions in solution can be recovered in the metallic form by reduction at a cathode under specific conditions. Examples are silver and copper [5,8,[10][11][12][13][14][15], whose economic value is significant, and cadmium, lead and nickel [6] used in common and car batteries, whose toxicity is high. The recovery of metals from Ni-Cd batteries has also been intensively studied in the last decade [7,[16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Metal Recovery from Aqueous Solutions

Ascensão

Ciríaco

Lopes

2011

Port. Electrochim. Acta

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Metal recovery by reduction of metal ions present in model solutions, containing one or more heavy metals, was performed. To prepare the model solutions, sulfates and/or chlorides of Cu(II), Cd(II), Pb(II) and Zn(II) were used, at pH 3.5. Assays were run in a one or two compartments cell, at different applied potentials, using a steel plate as cathode, a platinum plate as anode and an Ag/AgCl, KClsat as reference electrode. The metal recovery yield was determined by atomic absorption spectroscopy. The phases corresponding to the metallic deposits were identified by X-ray diffraction. For the solutions containing just one metal ion, the best metal recoveries and the corresponding applied potentials, obtained in a one cell compartment, were the following: Cu 2+ 99% at E = -100 mV; Pb 2+ 99% at E = -800 mV; Cd 2+ 93% at E = -900 mV; and Zn 2+38% at E = -1300 mV. The metal removals from the mixed solution of four heavy metals, after 4 consecutive chronoamperometries, performed in a one compartment cell, at the best applied potentials determined with the solutions containing only one metal ion, were the following: Cu

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Polarization curves in the ohmic controlled electrodeposition of metals

Cited by 21 publications

References 15 publications

Formation of two-dimensional (2D) lead dendrites by application of different regimes of electrolysis

Formation of two-dimensional (2D) lead dendrites by application of different regimes of electrolysis

The Cathodic Polarization Curves in Electrodeposition of Metals

Metal Recovery from Aqueous Solutions

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