Electrodeposition Of Indium Research Articles

ChemInform Abstract: Intermetallic Compounds Formed by Electrodeposition of Indium on Bismuth.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Intermetallic compounds formed by electrodeposition of indium on bismuth

Indium electrodeposition on bismuth cathodes at constant current density and room temperature gives rise to the formation of three intermetallic compounds owing to indium diffusion and reaction inside the electrode. The mechanism of this process has been investigated by scanning electron microscopy, energy-dispersive spectrometry and X-ray diffraction, analysing the morphology, composition and structure of the deposit surface and cross-section. The intermetallic compounds are In 2Bi, In 5Bi 3 and InBi, the latter being the unique compound at the end of the analysed time-scale (1500 h), while In 5Bi 3 never emerged on the electrode surface.

Mechanism and kinetics of the cathodic reduction of In(III) ions at a gold electrode from concentrated ZnBr 2 solutions

The electrodeposition of indium from concentrated aqueous ZnBr 2 solutions of In(III) was investigated employing coulometry, rotating disc and ring-disc electrode voltammetry. With increasing concentration of ZnBr 2, the three-electron wave of the In(III) reduction gradually splits into two waves, which correspond to the In(III)/In(I) and In(I)/In electrode reactions, respectively. The diffusion coefficients of the In(III) and In(I) ions, and the formal potentials and kinetic parameters of the In(III)/In(I) electrode reaction were determined for ZnBr 2 concentrations varying within the range 6.0–9.4 mol dm −3. The stepwise nature of the above-mentioned reaction is discussed.

The electrodeposition of indium onto vitreous carbon from acidic chloride media

The electrodeposition of indium onto vitreous carbon from acidic chloride media

The electrodeposition of indium onto vitreous carbon from acidic chloride media

Cyclic voltammetry and potential step techniques have been used to study the electrodeposition of indium metal from 1 mol dm −3 potassium chloride, pH 2–4.5, onto a vitreous carbon electrode. It is confirmed that the In/In 3+ couple is fast in chloride media and the nucleation and growth of the indium phase is discussed. It is shown that instantaneous nucleation occurs at an overpotential of only a few mV and that the growth of the nuclei is three dimensional.

Electrode reactions during the electrodeposition of indium from acid sulphate solutions

Electrodeposition of indium from acid sulphate solutions has been examined and data are reported concerning cathode current efficiencies (CCE). Optimum process conditions are suggested as: 20 g l -1 In 2(SO 4) 3 at pH 2.0, 25 °C and 20 mA cm −2 with CCE=64%. Insoluble platinum, possibly combined with soluble indium, is the most suitable anode. Analysis of the activation polarisation characteristics suggests that for the cathodic reaction two Tafel regions may be observed: at low overpotential (<450 mV) a slope of 210 mV per decade is found, the rate-determining step (RDS) being In 3+ → In 2+ while at higher overpotentials the slope rises to 325 mV per decade, the RDS being In 3+ → In +. For the anodic dissolution, a low overpotential range (5 – 28 mV) has a Tafel slope of 22.1 mV per decade and an RDS of In → In +, while a second region (η>30mV) has a slope of 64.6 mV per decade and an RDS of In → In 2+.

The Electrodeposition of Indium from Sulfate Baths

The Electrodeposition of Indium from Sulfate Baths

The Electrodeposition of Indium from Cyanide Solutions

The Electrodeposition of Indium from Cyanide Solutions

XLII.—The electro-deposition of indium with the dropping-mercury cathode

The first page of this article is displayed as the abstract.