Morphology of Different Electrodeposited Pure Metal Powders

Jović, V.D.; Nikolić, Nebojša D.; Lačnjevac, U.Č.; Jović, B.M.; Popov, Konstantin

doi:10.1007/978-1-4614-2380-5_2

Cited by 13 publications

(15 citation statements)

References 66 publications

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“…Dendrites are the most common shape of electrochemically produced irregular forms. Due to a regular and well defined shapes [2], metals characterized by low melting points, T m , and high the exchange current density, j 0 , values are especially suitable for the examination of mechanism of the dendritic growth. The typical representatives of this group of metals are Pb, Sn, Tl, Cd, Hg, Zn and Ag (simple electrolytes) and they are usually denoted as normal metals [3,4].…”

Section: Introductionmentioning

confidence: 99%

The potentiostatic current transients and the role of local diffusion fields in formation of the 2D lead dendrites from the concentrated electrolyte

Nikolić

Popov

Ivanović

et al. 2015

Journal of Electroanalytical Chemistry

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Section: Introductionmentioning

confidence: 99%

The potentiostatic current transients and the role of local diffusion fields in formation of the 2D lead dendrites from the concentrated electrolyte

Nikolić

Popov

Ivanović

et al. 2015

Journal of Electroanalytical Chemistry

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“…These structures are highly regular crystals, a characteristic feature of crystal growth under activation control ( Ref 7,[23][24][25]. In the j range considered in this work, the dendrites grow with the same morphology of the crystals developed at the surface (Fig.…”

Section: Resultsmentioning

confidence: 91%

Morphology and Texture of Zinc Deposits Formed at the Edge of a Rotating Washer Electrode

Bengoa

Seré

Conconi

et al. 2016

J. of Materi Eng and Perform

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In this paper, a rotating washer electrode was used to simulate the industrial conditions of strip edges during electrogalvanizing. Using this experimental setup, morphology and texture of the zinc deposits and dendrites formed at the edge of the electrode were studied. Dendrite precursors in the corner of the washer edge were well characterized and their nucleation and growth were also studied. The results indicated that the rotation speed has little effect on texture while, in contrast, current density modifies dendriteÕs texture. It was found that dendrites are formed by platelets which are stacked on one another, which grow up in a series of steps oriented in the direction of growth of the dendriteÕs stem yielding highly oriented structure. The presence of sodium ions in the electrolyte changes the morphology and shape of dendrites leading to rounded, ÔcabbageÕ-shaped crystals, while thiourea changes the morphology of both the deposit in the flat portion of the washer and the dendrites through adsorption on the zinc surface.

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“…For this group of metals, there is a parallelism between metal electrodeposition process and hydrogen evolution reaction in the whole range of potentials and current densities. For that reason, it is no possible to record the polarization curve in a classical way, but it is possible with an application of IR drop compensation technique [2,32,33].…”

Section: The Inert Metalsmentioning

confidence: 99%

Influence of the exchange current density and overpotential for hydrogen evolution reaction on the shape of electrolytically produced disperse forms - Review

Nikolić¹

2020

J. Electrochem. Sci. Eng.

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In this study, comprehensive survey of formation of disperse forms by the electrolysis from aqueous electrolytes and molten salt electrolysis has been presented. The shape of electrolitically formed disperse forms primarily depends on the nature of metals, determined by the exchange current density (j0) and overpotential for hydrogen evolution reaction as a parallel reaction to metal electrolysis. The decrease of the j0 value leads to a change of shape of dendrites from the needle-like and the 2D fern-like dendrites (metals characterized by high j0 values) to the 3D pine-like dendrites (metals characterized by medium j0 values). The appearing of a strong hydrogen evolution leads to formation of cauliflower-like and spongy-like forms (metals characterized by medium and low j0 values). The other disperse forms, such as regular and irregular crystals, granules, cobweb-like, filaments, mossy and boulders, usually feature metals characterized by the high j0 values. The globules and the carrot-like forms are a characteristic of metals with the medium j0 values. The very long needles were a product of molten salt electrolysis of magnesium nitrate hexahydrate. Depending on the shape of the disperse forms, i.e. whether they are formed without and with vigorous hydrogen evolution, formation of all disperse forms can be explained by either application of the general theory of disperse deposits formation or the concept of "effective overpotential". With the decrease of j0 value, the preferred orientation of the disperse forms changed from the strong (111) in the needle-like and the fern-like dendrites to randomly oriented crystallites in the 3D pine-like dendrites and the cauliflower-like and the spongy-like forms.

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Morphology of Different Electrodeposited Pure Metal Powders

Cited by 13 publications

References 66 publications

The potentiostatic current transients and the role of local diffusion fields in formation of the 2D lead dendrites from the concentrated electrolyte

The potentiostatic current transients and the role of local diffusion fields in formation of the 2D lead dendrites from the concentrated electrolyte

Morphology and Texture of Zinc Deposits Formed at the Edge of a Rotating Washer Electrode

Influence of the exchange current density and overpotential for hydrogen evolution reaction on the shape of electrolytically produced disperse forms - Review

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