Electrodeposition of lead from aqueous acetate and chloride solutions

Ghali, Edward; Girgis, Magdy

doi:10.1007/bf02654847

Cited by 22 publications

(8 citation statements)

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“…7). X-ray analyses revealed the presence of peaks related to acetate compounds at temperatures lower than 55°C most likely arise from lead acetate compound (15). From the behaviour of Tafel slopes as a function of of temperature and from the XRD analyses, one may infer that acetate anion adsorption on lead deposit decreases as temperature increases.…”

Section: The Behaviour In the Bulk Deposition Regionmentioning

confidence: 97%

“…In previous studies (15,16), evidence for the formation of Pb(CH3COO)2 at room temperature was obtained from some surface analyses conducted by X-ray diffraction and Auger electron spectroscopy techniques.…”

Section: Effect Of Temperature On the Voltammograms In The Updmentioning

confidence: 99%

“…In the frame work of this approach, other studies (15,16) have been undertaken to study lead deposition process from these media in order to find the optimum conditions necessary to obtain the metal directly from the sulphide ore. The investigation of this system at ambient temperature was carried out using different electrochemical techniques ( 17).…”

Section: Introductionmentioning

confidence: 99%

“…Graphite and saturated calomel electrodes served as auxiliary and reference electrodes, respectively. The preparation of electrodes and the electrochemical set up are described in previous studies (15,17).…”

Section: Introductionmentioning

confidence: 99%

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Effect of temperature on cyclic voltammograms during the electrodeposition of lead

Girgis¹,

Ghali²

1989

Can. J. Chem.

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MAGDY GIRGIS and EDWARD GHALI. Can. J. Chem. 67, 130 (1989). The electrochemical behavior of lead deposition process in a temperature range between 25 and 75°C was studied in a medium of lead chloride and ammonium acetate by linear and cyclic sweep perturbation. The study was undertaken on four substrates: Pb, Cu, Ag, and C. An increase in temperature resulted in accelerating the deposition process and promoted dendrite formation. Moreover, different kinetic parameters such as adsorption isotherms, Tafel slopes, and diffusion coefficient were affected as a function of temperature elevation. Surface analytical study performed by Auger electron spectroscopy revealed an increase in peak intensities of C1 and Pb as the temperature increased.Key words: electrodeposition, cyclic voltammetry, potentiostatic transients, underpotential deposition, temperature effect. IntroductionThe use of stationary electrode voltammetry in qualitative and quantitative investigations of electrolysis mechanisms has been extensive (1 -3), particularly in the field of electrocrystallization (4, 5). Considerable difficulties arise in the electrochemical studies of metal deposition due to the complex structure of the underlying metal (6) which lead to poor reproducibility, particularly in the appearance and structure of the deposits (7). There have been several studies of electrodeposition of lead (8-1 1).The choice of the acidified ammonium acetate bath was based on previous studies carried out in our laboratory (12)(13)(14) to investigate the dissolution of galena in different media. The results showed that the anodic passivation caused mainly by lead chloride formation is reduced in acetate medium due to the strong activity of ammonium acetate in dissolving PbC12.In the frame work of this approach, other studies (15, 16) have been undertaken to study lead deposition process from these media in order to find the optimum conditions necessary to obtain the metal directly from the sulphide ore. The investigation of this system at ambient temperature was carried out using different electrochemical techniques ( 17). To obtain more information about the cathodic process we tried to study the effect of elevated temperature on the system. To our knowledge, the effect of temperature on the behaviour of lead ions during the deposition process has not been reported in literature. This paper, therefore, has been intended to shed some light on the reaction mechanism during the deposition process in acetate medium as a function of temperature by employing the techni-

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Section: The Behaviour In the Bulk Deposition Regionmentioning

confidence: 97%

Section: Effect Of Temperature On the Voltammograms In The Updmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of temperature on cyclic voltammograms during the electrodeposition of lead

Girgis¹,

Ghali²

1989

Can. J. Chem.

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“…In the optimization of electrolytes for use in lead battery technology and lead scrap recycling, the effects of some organic additives, such as sorbitol [17] and glycerol [15], were studied. Bright, smooth, and compact lead deposits can be formed by electrodeposition from an acetate bath with the addition of phenol, ethanol, and gelatin as additives [18]. Otherwise, the deposited lead obtained from an acetate bath without additives was crystalline and showed a marked tendency to form dendrites [10].…”

Section: Introductionmentioning

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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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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A New Approach to the Understanding of the Mechanism of Lead Electrodeposition

Nikolić

Popov

2014

Modern Aspects of Electrochemistry

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Electrodeposition of lead from aqueous acetate and chloride solutions

Cited by 22 publications

References 0 publications

Effect of temperature on cyclic voltammograms during the electrodeposition of lead

Effect of temperature on cyclic voltammograms during the electrodeposition of lead

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

A New Approach to the Understanding of the Mechanism of Lead Electrodeposition

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