Electrochemical Behavior of Porous Titanium Electrodes in Phosphoric Acid

Kushmyruk, A. І.; Kosohin, O.; Linyucheva, О. V.; Reveko, V. A.; Miroshnychenko, Yu. S.

doi:10.1007/s11003-015-9859-z

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“…1b, the oxidation potential of metal indium is between ¹0.25 V and ¹0.31 V, and the concentration of impurity tin is ¹0.17 V. The limit concentration of impurity tin deposition on titanium electrode is 5000 ppm. 18 Under these conditions, the concentration of Sn 2+ reached the limit value, the cyclic voltammetry test of the system with different scanning speeds was carried out for further research about the influence of impurities on the electrochemical behavior of metal indium. The results of cyclic voltammetry are shown in Fig.…”

Section: Cyclic Voltammetry and Square Wave Voltammetrymentioning

confidence: 99%

Effect of Tin Ion on Electrodeposition Behavior of Indium

Hou

WANG

et al. 2022

Electrochemistry

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Electrorefining is an effective method for preparing high-purity indium. To realize the control of impurity Sn in crude indium electrolytic refining, electrochemical test methods, such as cyclic voltammetry (CV), and chronoamperometry (CA) were mainly used to study the electrochemical behavior of indium. The results show that when a few of SnSO 4 was added to the electrolyte containing indium sulfate, in the meantime, the Sn 2+ concentration reached 5000 ppm, in the electrolysis process, the impurity Sn in the cathode was appeared to precipitate before the indium precipitated. The electrodeposition of indium was irreversible, controlled by diffusion steps, and In 3+ reduction was carried out by fractional steps, transferring one electron at a time. The diffusion coefficient of In 3+ calculated by cyclic voltammetry was 1.02 × 10 −7 cm 2 /s, and the average charge transfer coefficient was 0.081. The nucleation mechanism of indium conformed to three-dimensional instantaneous nucleation. The results provide theoretical guidance for electrolytic refining of crude indium and electrochemical regulation of impurities.

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Section: Cyclic Voltammetry and Square Wave Voltammetrymentioning

confidence: 99%