Studies of the kinetics of aluminium incorporation into an iron electrode in molten salts by linear sweep voltammetry

Al-Ti alloys were electrodeposited from equimolar chloroaluminate molten salts containing up to 0.1 M of titanium ions, which were added to the electrolyte by potentiostatic dissolution of metallic Ti. Titanium dissolution and titanium and aluminium deposition were investigated by linear sweep voltammetry and chronoamperometry at 200 and 300 °C. Working electrodes used were titanium and glassy carbon. The voltammograms on Ti obtained in the electrolyte without added Ti ions indicated titanium deposition and dissolution proceeding in three reversible steps: Ti4+ ⇄ Ti3+, Ti3+ ⇄ Ti2+ and Ti2+ ⇄ Ti. The voltammograms recorded with glassy carbon in the electrolyte containing added titanium ions did not always clearly register all of the three processes. However, peak currents, which were characteristics of Al, Ti and Al-Ti alloy deposition and dissolution, were evident in voltammograms on both working electrodes used. A constant potential electrodeposition regime was used to obtain deposits on the glassy carbon working electrode. The obtained deposits were characterized by SEM, energy-dispersive spectrometry and XRD. In the deposits on the glassy carbon electrode, the analysis identified an Al and AlTi3 alloy formed at 200 °C and an Al2Ti and Al3Ti alloy obtained at 300 °C.

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The reduction of HCl dissolved in LiCl-KCl eutectic

Australian Journal of Chemistry ◽

10.1071/ch9750965 ◽

1975 ◽

Vol 28 (5) ◽

pp. 965 ◽

Cited By ~ 24

Author(s):

NQ Minh ◽

BJ Welch

Keyword(s):

Molten Salts ◽

Platinum Electrode ◽

Linear Sweep Voltammetry ◽

Reduction Reaction ◽

Linear Sweep ◽

Soluble Product ◽

Electron Transfer Process ◽

Small Ionic Radius ◽

Molten Salt System ◽

Good Agreement

The cathodic reduction of hydrogen chloride dissolved in LiCl-KCl eutectic has been studied by both chronopotentiometry and linear sweep voltammetry using a platinum electrode. The reduction reaction has been found to proceed by a reversible one-electron transfer process forming a soluble product. �� Diffusion coefficients calculated from solubility measurements and the electrochemical studies are considerably higher (e.g. 2.1 x 10-4 cm2 s-1 at 793 K) than most other solutes in molten salts but in good agreement with results from a less detailed study. The high value is probably due to the small ionic radius of the proton as compared to other ions in the lattice of the molten salt system.

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Effect of cetyltrimethylammonium bromide on the electrochemiluminiscence and electrooxidation of luminol

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19830477 ◽

1983 ◽

Vol 48 (2) ◽

pp. 477-483 ◽

Cited By ~ 3

Author(s):

Jan Lasovský ◽

František Grambal

Keyword(s):

Cetyltrimethylammonium Bromide ◽

Linear Sweep Voltammetry ◽

Critical Micellar Concentration ◽

Peak Height ◽

Anodic Peak ◽

Alkaline Solutions ◽

Platinum Electrodes ◽

Micellar Solutions ◽

Linear Sweep ◽

Low Concentrations

The electrooxidation of luminol in alkaline solutions in the presence of cetyltrimethylammonium bromide (I) was studied by linear sweep voltammetry on fixed and vibrating platinum electrodes. The presence of I in low concentrations (below the critical micellar concentration) brings about aggregation of the luminol, which is manifested by an increase in the anodic peak height and its shift towards lower potentials. In micellar solutions the peak height decreases owing to the slower diffusion of the bulkier micelles, the shift to lower potentials being preserved. The light-voltage curves correspond with the voltammetric curves, exhibiting identical shifts of the peak potentials in dependence on the concentration of the surfactant.

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Analysis of the diffusion layer thickness, equivalent circuit and conductance behaviour for reversible electron transfer processes in linear sweep voltammetry

Electrochimica Acta ◽

10.1016/j.electacta.2003.05.003 ◽

2004 ◽

Vol 49 (3) ◽

pp. 445-453 ◽

Cited By ~ 14

Author(s):

M. Arun Prasad ◽

M.V. Sangaranarayanan

Keyword(s):

Electron Transfer ◽

Equivalent Circuit ◽

Layer Thickness ◽

Diffusion Layer ◽

Linear Sweep Voltammetry ◽

Linear Sweep ◽

Diffusion Layer Thickness ◽

Transfer Processes ◽

Reversible Electron Transfer ◽

Electron Transfer Processes

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Electrochemical Approaches for Rapid Characterization of Oxidizable Compounds in Different Oak Alternatives

Beverages ◽

10.3390/beverages7010001 ◽

2020 ◽

Vol 7 (1) ◽

pp. 1

Author(s):

Jéremie Wirth ◽

Davide Slaghenaufi ◽

Stéphane Vidal ◽

Maurizio Ugliano

Keyword(s):

Linear Sweep Voltammetry ◽

Wine Industry ◽

Wine Aroma ◽

Total Current ◽

Strong Correlations ◽

Tannin Content ◽

Linear Sweep ◽

Antioxidant Characteristics ◽

Rapid Characterization

Oak alternatives (OAs) such as chips, granulates or staves, are becoming increasingly used in the wine industry. Although they are mostly considered for their contribution to wine aroma, they are also a source of phenolic compounds to be released in the wine, in particular ellagitannins contributing to wine mouthfeel and antioxidant characteristics. In the present study, we explore the potential for a rapid analytical method based on linear sweep voltammetry (LSV) combined with disposable sensors to provide a rapid measure of the oxidizable compounds present in different OAs, as well as their characterization. Strong correlations were found between the tannin content of different OAs and the total current measures during LSV analysis, allowing a rapid quantification of the oxidizable compounds present, mostly ellagitannin. Application of derivatization to raw voltammograms allowed extraction of a number of features that can be used for classification purposes, in particular with respect to OAs types (chips or staves) and degree of toasting.

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