Electrochemistry of Niobium, Tantalum and Titanium in Low-Temperature Carbamide-Halide Melts

Tumanova, N. Kh.; Boyko, O. I.; Buryak, N. I.; Kochetova, Svetlana

doi:10.1007/978-94-010-0127-4_19

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…Polarization curves in acetamide melt are blurred, so the electrode processes cannot be correctly interpreted. Adding ammonium chloride to acetamide to form acetamide-NH 4 Cl (22.3 mol.%) melt eutectic composition [Tumanova et al [5]] allowed us to obtain polarization curves which clearly show the electrochemical processes of the rhodium anode dissolution and of the reduction of its ions. Rhodium is dissolving in acetamide-chloride melt without passivation (Fig.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Behavior and Electrodeposition of Nanostructured Rhodium from Low-Temperature Carbamide and Acetamide Containing Melts

Kochetova¹,

Savchuk²,

Shakhnin³

et al. 2017

Nanoscale Res Lett

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The electrochemical behavior of rhodium at low-temperature carbamide-chloride and acetamide-chloride melts was investigated. It was found that, during rhodium anodic dissolution in carbamide and acetamide containing chloride melts, mixed complexes [Rh(NH3)4Cl2]+ of quasi-octahedral symmetry D4h are produced. The composition and structure of nascent complex ions have been studied. During electrochemical reduction of [Rh(NH3)4Cl2]+ complexes, the synthesis of Rh nanoparticles, as well as Fe, Cu, and Mo nanocoatings, were realized.

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Section: Resultsmentioning

confidence: 99%

Electrochemical Behavior and Electrodeposition of Nanostructured Rhodium from Low-Temperature Carbamide and Acetamide Containing Melts

Kochetova¹,

Savchuk²,

Shakhnin³

et al. 2017

Nanoscale Res Lett

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“…Because of the low electrical conductivity of molten carbamide, mixed carbamide-nitrate [4] and carbamide-halide [5] melts were used more often. When investigating the electrochemical behavior of refractory metals (Nb, Ta, Ti) in a carbamide-chloride melt, it was found that these metals are passivated in chloride-containing melts, and that their electrochemical dissolution (Nb, Ta) is impossible if electrode polarization does not reach 1V.…”

Section: Introductionmentioning

confidence: 99%

Electrolysis of Carbamide-Chloride Melts at Inert Electrodes

Kochetova

Tumanova

New Carbon Based Materials for Electrochemical Energy Storage Systems: Batteries, Supercapacitors and Fuel Cells

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Electrode reactions in carbamide and carbamide-chloride melts have been studied by cyclic voltammetry in combination with chromatography and IR spectroscopy of melts and gases for determining the electrolysis products. The interest in this process is accounted for by application of these melts as supporting electrolytes for electrochemical investigations. The peculiarities of carbamide-NH 4 Cl melt electrochemical behavior have been established. A new compound is formed during electrolyses at the potential of 1V, which is present in melt and in anodic gases (IR Spectroscopy). The investigation of electrochemical properties of this compound showed that it is electrochemically active (cyclic voltammetry) and is adsorbed (C-E method) on inert electrodes (Pt, glassy carbon). The formation of this compound, characterized by N-Cl bond, explains the depassivation effect of refractory metals under anodic dissolution if polarizable electrode reaches the transpassive region.

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Electrochemistry of Niobium, Tantalum and Titanium in Low-Temperature Carbamide-Halide Melts

Cited by 2 publications

References 7 publications

Electrochemical Behavior and Electrodeposition of Nanostructured Rhodium from Low-Temperature Carbamide and Acetamide Containing Melts

Electrochemical Behavior and Electrodeposition of Nanostructured Rhodium from Low-Temperature Carbamide and Acetamide Containing Melts

Electrolysis of Carbamide-Chloride Melts at Inert Electrodes

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