Electrochemical nucleation from molten salts—I. Diffusion controlled electrodeposition of silver from alkali molten nitrates

Hills, G. J.; Schiffrin, David J.; Thompson, J.

doi:10.1016/0013-4686(76)85098-0

Cited by 9 publications

(10 citation statements)

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“…Fragments of electroreduced metal seemingly separated on the planar view suggest more complex structure in the plane perpendicular to the visible surface, trapping the chloride salt in between the metal dendrites. Such structure is also a confirmation of the diffusion control of the process, which fits with the observations other researchers have made in this field 50,57,58 . …”

Section: Plated Materials Analysissupporting

confidence: 90%

Metal Recovery by Electrodeposition from a Molten Salt Two-Phase Cell System

Amietszajew

Sridhar

Bhagat

2016

J. Electrochem. Soc.

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A novel electrochemical recovery method of Co, Cu, Mn and Ni from a reactor based on two immiscible molten phases, to enable selective metal plating, sufficient feedstock dissolution and protection from re-oxidation, was designed and characterised through voltammetry and chronoamperometry. The immiscible phases in the electrolytic cell were NaCl and Na2O-2B2O3 at 1173 K, and the metal feedstock to be recovered was either metal chlorides or metal oxides of Co, Cu, Mn and Ni. Metals could be successfully recovered as plated metal deposits and the formal redox reaction potentials were reported. Metals thermodynamic behaviour differences between the cells were analysed. Analysis of the metal deposits showed that the recovered metals were of high purity (∼99%). This offers an alternative method to recycle valuable metals present in the growing e-waste stream.

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Section: Plated Materials Analysissupporting

confidence: 90%

Metal Recovery by Electrodeposition from a Molten Salt Two-Phase Cell System

Amietszajew

Sridhar

Bhagat

2016

J. Electrochem. Soc.

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“…Both analytical and experimental works are reported and readily available [7,9,[30][31][32][33][34]. Studying these processes generally means recording the metal's response to a variety of imposed signals (waves).…”

Section: Testsmentioning

confidence: 99%

Microstructure, surface chemistry and electrochemical response of Ag|AgCl sensors in alkaline media

et al. 2018

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Characterization of the Ag/AgCl electrode is a necessary step toward its application as a chloride sensor in a highly alkaline medium, such as concrete. The nucleation and growth of AgCl on Ag in 0.1 M HCl was verified through cyclic voltammetry. Ag anodization was performed at current densities, determined by potentiodynamic polarization in the same (0.1 M HCl) medium. The morphology and microstructure of the AgCl layers were evaluated via electron microscopy, while surface chemistry was studied through energy-dispersive spectroscopy and X-ray photoelectron spectroscopy. At current density above 2 mA/cm 2 , the thickness and heterogeneity of the AgCl layer increased. In this condition, small AgCl particles formed in the immediate vicinity of the Ag substrate, subsequently weakening the bond strength of the Ag/AgCl interface. Silver oxide-based or carbon-based impurities were present on the surface of the sensor in amounts proportional to the thickness and heterogeneity of the AgCl layer. It is concluded that a well-defined link exists between the properties of the AgCl layer, the applied current density and the recorded overpotential during Ag anodization. The results can be used as a recommendation for preparation of chloride sensors with stable performance in cementitious materials.

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“…As we demonstrated above, the Gibbs-Thomson effect can be neglected at the growth stage (see eqn (7)). Then from eqn (6), taking into account the stationary approximation of the Fick equation in spherical coordinates, [26][27][28] we can nd the current density to the growing small cluster:…”

Section: Analysis Of Theoretical Modelsmentioning

confidence: 99%