4.5 Editorial Material

Advances in Understanding Metal Electrolysis Process

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Article Materials Science, Multidisciplinary

Electrodeposition of Indium from an Ionic Liquid Investigated by In Situ Electrochemical XPS

Zhen Liu et al.

Summary: The electrochemical behavior and electrodeposition of indium in an electrolyte composed of 0.1 mol/L InCl3 in [Py-1,Py-4]TFSI were studied on a gold electrode. The results revealed complex electrochemical behavior with multiple reduction and oxidation peaks. In situ XPS analysis showed that In(I) was the intermediate species during the reduction process. The presence of Cl- oxidation was also observed in the anodic regime.

METALS (2022)

Article Materials Science, Multidisciplinary

Model and Mechanism of Anode Effect of an Electrochemical Cell for Nd or (Nd, Pr) Reduction

Andre Luiz Nunis da Silva et al.

Summary: In this study, a mathematical model is developed to investigate the influence of process parameters on the anode effect during neodymium and didymium oxide electrolytic reduction. The anode effect is caused by bubble coverage and limitations on the mass transfer of oxide species, with variables such as current density, oxide content, viscosity, and electrolyte composition playing a significant role in the anodic process.

METALS (2022)

Article Materials Science, Multidisciplinary

The Behavior of Ruthenium in Copper Electrowinning

Alexandra Thiere et al.

Summary: The recycling of materials may introduce ruthenium into the copper electrowinning process, causing potential ruthenium losses. This study explores the oxidation behavior of ruthenium in copper electrowinning and finds that ruthenium is not directly oxidized to ruthenium tetroxide electrochemically. Instead, the formation of oxidants through chemical reactions leads to the conversion of ruthenium compounds to highly volatile ruthenium tetroxide. The temperature and anodic potential play significant roles in these reactions.

METALS (2022)

Article Materials Science, Multidisciplinary

Influence of Rare Earth Oxide Concentration on Electrochemical Co-Deposition of Nd and Pr from NdF3-PrF3-LiF Based Melts

Vesna S. Cvetkovic et al.

Summary: This study investigated the impact of rare earth oxide (REO) concentration on the deposition process and selective recovery of the metal being deposited in a molten fluoride salt system. By constructing a phase diagram and using different deposition techniques, co-deposition of neodymium and praseodymium was achieved, leading to higher co-deposition rates and a more effective deposition process.

METALS (2022)

Article Materials Science, Multidisciplinary

Electrodeposition of Aluminium-Vanadium Alloys from Chloroaluminate Based Molten Salt Containing Vanadium Ions

Vesna S. Cvetkovic et al.

Summary: Al-V alloys were synthesized by potentiostatic electrodeposition on a glassy carbon electrode, resulting in the formation of Al3V and AlV3 alloys through solid-state interdiffusion. Control of vanadium ion concentration in the electrolyte allowed for regulation of alloy composition and surface morphology. This research suggests that controlled co-deposition of aluminum and vanadium could lead to the successful development of advanced Al3V and AlV3 alloy synthesis technology.

METALS (2021)

Article Materials Science, Multidisciplinary

Implementation of the Chicot-Lesage Composite Hardness Model in a Determination of Absolute Hardness of Copper Coatings Obtained by the Electrodeposition Processes

Ivana O. Mladenovic et al.

Summary: The study investigated the influence of different electrolysis parameters on the morphology, structure, and hardness of copper coatings, revealing two types of Cu coatings with varying hardness. A critical relative indentation depth was established for all types of Cu coatings.

METALS (2021)

Article Materials Science, Multidisciplinary

Zn-Co-CeO2 vs. Zn-Co Coatings: Effect of CeO2 Sol in the Enhancement of the Corrosion Performance of Electrodeposited Composite Coatings

Marija Ridosic et al.

Summary: The main goal of this research was to electrodepose and characterize novel ceria-doped Zn-Co composite coatings. It was found that the use of ceria sol improved the corrosion resistance of the coatings, transforming them from a cauliflower-like morphology to a uniform and compact coral-like structure, and exhibited a good self-healing rate in a chloride-rich environment.

METALS (2021)

Article Materials Science, Multidisciplinary

Towards Understanding the Cathode Process Mechanism and Kinetics in Molten LiF-AlF3 during the Treatment of Spent Pt/Al2O3 Catalysts

Andrey Yasinskiy et al.

Summary: The study investigated the electrochemical decomposition of spent catalyst in molten salts for the extraction of precious metals, focusing on aluminum electrowinning from xLiF-(1-x)AlF3 melts. The results revealed a diffusion-controlled two-step process with both one-electron and two-electron reductions occurring simultaneously at close potentials. Further research is needed to optimize the process parameters for aluminum reduction during catalyst treatment and primary metal production.

METALS (2021)

Article Materials Science, Multidisciplinary

Electrochemical Study of Nd and Pr Co-Deposition onto Mo and W from Molten Oxyfluorides

Vesna S. Cvetkovic et al.

Summary: The electrodeposition processes of neodymium and praseodymium were studied in molten electrolytes, showing that constant praseodymium deposition overpotential is crucial for achieving high deposition current densities. Various electrochemical techniques were applied to understand the reduction mechanisms of Nd and Pr ions on different cathodes, providing valuable insights for environmentally friendly rare earth metal deposition and recycling of neodymium-iron-boron magnets.

METALS (2021)

Review Materials Science, Multidisciplinary

Correlation of Morphology and Crystal Structure of Metal Powders Produced by Electrolysis Processes

Nebojsa D. Nikolic et al.

Summary: The morphologies of metal powders produced by electrolysis are correlated with their crystal structure, which is influenced by exchange current density and overpotential for hydrogen evolution reaction. Decreasing exchange current density can change crystal structure of powder particles from preferred orientation in dendrites to randomly oriented crystallites in spherical particles. Processes involving molten salt electrolysis and deep eutectic solvents are also discussed in this review.

METALS (2021)