The role of initial hexagonal self-ordering in anodic nanotube growth in ionic liquid

Lebedeva, Olga; Kultin, Dmitry; Kudryavtsev, I. K.; Root, Natalia; Kustov, L. М.

doi:10.1016/j.elecom.2017.01.005

Cited by 20 publications

(14 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this case, according to the SEM data, nano-cells were detected on the surface of the electrode (Figure 2a). A similar phenomenon was observed earlier on the surface of various electrodes during anodization in ionic liquids [17][18][19] and other non-aqueous electrolytes [29][30][31].…”

supporting

confidence: 85%

“…In some cases, the etching (pitting) of the electrode surface is also observed. In general, the result of anodization depends on the nature of the metal, alloying additives, surface morphology, properties of surface oxide films, type of ionic liquid (hydrophobic/hydrophilic), presence/absence of water, temperature and other factors [17][18][19]. The influence of the nature of the ionic liquid (hydrophilic/hydrophobic) was studied during the anodization of Ti, Ni, crystalline steel.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impact of Pretreatment of Metal Glass Fe70Cr15B15 on Anodization in 1-butyl-3-methylimidazolium Tetrafluoroborate Ionic Liquid

Lebedeva

Snytko

Kuznetsova

et al. 2020

Metals

Self Cite

View full text Add to dashboard Cite

The impact of preliminary treatment (mechanical abrasion; chemical etching and anodization in ionic liquid) on the surface structure and corrosion behavior of Fe70Cr15B15 metal glass was studied. The detachment of the anodic oxide film from untreated Fe-amorphous alloy under anodization in ionic liquid was observed for the first time. The formation of hexagonal nanostructures (cells) on the surface of the Fe70Cr15B15 alloy after mechanical abrasion and following anodization in 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF4]) ionic liquid was also detected for the first time. Electrochemical corrosion of the initial and pretreated amorphous alloy was tested in a Na2SO4 aqueous solution. The resistance to corrosion was found to be enhanced slightly after mechanical abrasion. The sample with hexagonal nanostructures obtained after anodization of the mechanically abraded sample demonstrated a more significant anodic shift in the corrosion potential (Ecorr = + 379 mV) compared with that for the initial alloy (Ecorr = −125 mV).

show abstract

supporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Impact of Pretreatment of Metal Glass Fe70Cr15B15 on Anodization in 1-butyl-3-methylimidazolium Tetrafluoroborate Ionic Liquid

Lebedeva

Snytko

Kuznetsova

et al. 2020

Metals

Self Cite

View full text Add to dashboard Cite

show abstract

“…The formation of TiO 2 Nano tubular structures is a complex process, and the mechanisms are still controversial [30,31]. Previous works have discussed the formation mechanisms of TiO 2 nanotubes based on the field-assisted dissolution theory (FAD) [32], which suggests that the reaction happening at the anode is the oxidation of the titanium metal, releasing Ti 4+ and electrons (Equation (1)).…”

Section: Formation Mechanism Of Tio 2 Nanotubesmentioning

confidence: 99%

Effect of Morphology on the Photoelectrochemical Activity of TiO2 Self-Organized Nanotube Arrays

et al. 2020

View full text Add to dashboard Cite

In the present work, highly ordered titanium dioxide (TiO 2 ) nanotube anodes were grown using a rapid anodization process. The photoelectrochemical performances of these electrodes strongly depend on the anodization conditions. Parameters such as electrolyte composition, anodization potential and anodization time are shown to affect the geometrical parameters of TiO 2 nanotubes. The optimal anodization parameters are determined by photocurrent measurements, linear sweep voltammetry and electrochemical impedance spectroscopy. The thickness of the tube wall and its homogeneity is shown to strongly depend on the anodization potential, and the formation mechanism is discussed. This study permits the optimization of the photocurrent density and contributes to further improvement of the photoelectrochemical water-splitting performance of TiO 2 nanotube photoelectrodes.

show abstract

“…Formation of surface oxide nanostructures (tubes, rods, and so on) by anodizing of metals is also of particularly growing interest . Such structures were found after anodizing metallic titanium, hafnium, niobium, zirconium-based alloys, − but not iron alloys. The appearance of nanoscale oxide tubes on the metal surface by anodizing an electrode is really a rare phenomenon, which was detected so far only for certain metals and alloys. − …”

Section: Introductionmentioning

confidence: 99%

Nanorolls Decorated with Nanotubes as a Novel Type of Nanostructures: Fast Anodic Oxidation of Amorphous Fe–Cr–B Alloy in Hydrophobic Ionic Liquid

Lebedeva

Kultin

Калмыков

et al. 2021

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

The formation of oxide nanorolls decorated with nanotubes during anodic oxidation of amorphous Fe70Cr15B15 alloy in hydrophobic ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate (IL) was revealed. The unusual architecture was observed for the first time on the surface of amorphous alloy. The generation of the novel type of nanostructure by electrochemical oxidation of the amorphous Fe70Cr15B15 alloy occurs only in hydrophobic ionic liquid and in the presence of the natural oxide film at the surface. Anodization of the oxide-free metal surface of the amorphous Fe70Cr15B15 alloy to be achieved by the treatment of the electrode with benzoic acid was found to result in no formation of both nanorolls and nanotubes. Electrochemical behavior of the amorphous Fe70Cr15B15 alloy in ionic liquid was proved to depend strongly on the state of the electrode surface before oxidation. The influence of the state of the surface of amorphous Fe70Cr15B15 alloy leading to the nanostructure formation was studied by means of preliminary partial etching with benzoic acid of various concentrations.

show abstract

The role of initial hexagonal self-ordering in anodic nanotube growth in ionic liquid

Cited by 20 publications

References 24 publications

Impact of Pretreatment of Metal Glass Fe70Cr15B15 on Anodization in 1-butyl-3-methylimidazolium Tetrafluoroborate Ionic Liquid

Impact of Pretreatment of Metal Glass Fe70Cr15B15 on Anodization in 1-butyl-3-methylimidazolium Tetrafluoroborate Ionic Liquid

Effect of Morphology on the Photoelectrochemical Activity of TiO2 Self-Organized Nanotube Arrays

Nanorolls Decorated with Nanotubes as a Novel Type of Nanostructures: Fast Anodic Oxidation of Amorphous Fe–Cr–B Alloy in Hydrophobic Ionic Liquid

Contact Info

Product

Resources

About