Study of electrode processes and deposition of cobalt thin films from ionic liquid analogues based on choline chloride

Cojocaru, Anca; Mares, Mariana Lili; Prioteasa, Paula; Anicăi, Liana; Visan, Teodor

doi:10.1007/s10008-014-2711-9

Cited by 23 publications

(29 citation statements)

References 34 publications

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“…The anodic regeneration of electrodeposited surfaces in critical metal recovery has not been extensively investigated, and in some cases, the regeneration of electrodeposited surfaces is known to be difficult for some critical elements ( Chernyshova et al., 2020 ). For example, the anodic oxidation of electrodeposited cobalt and nickel was found to be irreversible according to cyclic voltammetry, in part due to the formation of insoluble oxides or hydroxide, resulting in much lower charge efficiency during anodic stripping when compared with the charge during cathodic deposition ( Cojocaru et al., 2014 ; Grdeń and Jagiełło, 2012 ; Yu, 2017 ). It is worth noting that redox-promoted anodic stripping on polymer interfaces can enhance the regeneration efficiency.…”

Section: Electrochemical Separations For Selective Recoverymentioning

confidence: 99%

Electrochemical approaches for selective recovery of critical elements in hydrometallurgical processes of complex feedstocks

Kim¹,

Candeago²,

Rim³

et al. 2021

iScience

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Summary Critical minerals are essential for the ever-increasing urban and industrial activities in modern society. The shift to cost-efficient and ecofriendly urban mining can be an avenue to replace the traditional linear flow of virgin-mined materials. Electrochemical separation technologies provide a sustainable approach to metal recovery, through possible integration with renewable energy, the minimization of external chemical input, as well as reducing secondary pollution. In this review, recent advances in electrochemically mediated technologies for metal recovery are discussed, with a focus on rare earth elements and other key critical materials for the modern circular economy. Given the extreme heterogeneity of hydrometallurgically-derived media of complex feedstocks, we focus on the nature of molecular selectivity in various electrochemically assisted recovery techniques. Finally, we provide a perspective on the challenges and opportunities for process intensification in critical materials recycling, especially through combining electrochemical and hydrometallurgical separation steps.

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Section: Electrochemical Separations For Selective Recoverymentioning

confidence: 99%

Electrochemical approaches for selective recovery of critical elements in hydrometallurgical processes of complex feedstocks

Kim¹,

Candeago²,

Rim³

et al. 2021

iScience

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“…Two different DESs based on a mixture of choline chloride with ethylene glycol or urea has been used to electrodeposit Co–Sn or Co. ,− Cojocaru et al showed that the morphology of the cobalt deposits obtained was influenced by the nature of the electrolyte used. Nevertheless, both ChCl–EG and ChCl–urea mixtures originated smooth, adherent, and uniform deposits.…”

Section: Introductionmentioning

confidence: 99%

“…7,8 DESs share with ionic liquids most of their properties (e.g., they are nontoxic, have high solubility of metal salts, and have a wide electrochemical window) without being very expensive or moisture sensitive, 7,9,10 and they have been successfully used to electrodeposit metals. 11 Two different DESs based on a mixture of choline chloride with ethylene glycol or urea has been used to electrodeposit Co− Sn or Co. 1,12−16 Cojocaru et al 13 showed that the morphology of the cobalt deposits obtained was influenced by the nature of the electrolyte used. Nevertheless, both ChCl−EG and ChCl−urea mixtures originated smooth, adherent, and uniform deposits.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Properties of Co–Sn Coatings Electrodeposited from Choline Chloride-Based Deep Eutectic Solvents

Pereira

Silva

Pereira

et al. 2017

Crystal Growth & Design

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Co−Sn alloy films were electrodeposited from choline chloride (ChCl)−ethylene glycol (EG) and choline chloride (ChCl)−urea (U) eutectic mixtures. The deposition of Co−Sn alloy on a copper electrode was studied by cyclic voltammetry, which demonstrates that the coelectrodeposition was achieved. For comparison of properties, Co−Sn alloys were deposited from electrolytes with different Co/Sn ratios. The X-ray diffraction patterns (XRD) showed that the phase structure was affected by the Co/Sn ratio; nevertheless, Co 3 Sn 2 was always the predominant phase. Traces of metallic cobalt were also detected. The nature of the electrolyte used and the metallic composition affected the morphologies of the deposits and their corrosion resistance. The best corrosion resistant coating, with a corrosion potential of −617 mV, was composed by 44.4 wt % of Co and 55.6% of Sn, and it was obtained from the ChCl−EG electrolyte. The magnetic properties of the analyzed samples did not present an evident relationship with the metallic ions ratio in solution.

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“…Ni and its alloys have been studied in many non-aqueous systems, especially in ionic liquids and deep eutectic solvents (DESs) and applied for corrosion protection, catalysis and magnetic devices. [12][13][14][15][16][17][18][19][20][21][22] Particularly, the DESs have been largely studied for use in replacement of water, 8,11,[23][24][25][26] since they are biodegradable, easy to prepare, low sensitive to humidity, besides having an electrochemical window larger than water. [27][28][29][30] Among DESs, special attention has been given to choline chloride (ChCl)-based ones and particularly to two of them, one formed by ChCl and ethylene glycol (ChCl:2EG) and other by ChCl and urea (ChCl:2U), both in a molar proportion of 1:2.…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition Study of Ni Coatings on Copper from Choline Chloride-Based Deep Eutectic Solvents

Urcezino

Santos

Casciano

et al. 2016

J. Braz. Chem. Soc.

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Nickel was electrodeposited from choline chloride (ChCl)-based deep eutectic solvents (DESs) containing ethylene glycol (EG) and urea (U) on Cu substrate. The influence of the temperature and of DESs nature was evaluated. The diffusion coefficients of nickel varied from 2.2 × 10 −9 to 3.7 × 10 −8 cm 2 s −1 for ChCl:2U and from 1.3 × 10 −8 to 5.8 × 10 −8 cm 2 s −1 for ChCl:2EG with increasing temperature. The nucleation process of Ni on Cu at 70 °C was determined as instantaneous in ChCl:2EG and progressive in ChCl:2U using Scharifker and Hills model. The SEM characterization showed that with increasing temperature, more compact coatings were obtained. Linear polarization and electrochemical impedance spectroscopy were used to evaluate the corrosion performance of the obtained deposits in 3.5% NaCl. The coatings were more protective as higher the temperature of deposition, with polarization resistance (R p) values from 3.53 to 19.11 kΩ cm 2 .

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Study of electrode processes and deposition of cobalt thin films from ionic liquid analogues based on choline chloride

Cited by 23 publications

References 34 publications

Electrochemical approaches for selective recovery of critical elements in hydrometallurgical processes of complex feedstocks

Electrochemical approaches for selective recovery of critical elements in hydrometallurgical processes of complex feedstocks

Enhanced Properties of Co–Sn Coatings Electrodeposited from Choline Chloride-Based Deep Eutectic Solvents

Electrodeposition Study of Ni Coatings on Copper from Choline Chloride-Based Deep Eutectic Solvents

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