Investigations on the electrochemistry and reactivity of tantalum species in 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide using X-ray photoelectron spectroscopy (in situ and ex-situ XPS)

Krebs, Fabien; Höfft, Oliver; Endres, Frank

doi:10.1016/j.apsusc.2022.155130

Cited by 6 publications

(3 citation statements)

References 51 publications

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“…The tensile vibration of the Ti-O bond appears at 1119 cm -1 and 1112 cm -1 , and the tensile vibration peak of an O-Ti-O bond can be observed in the range of 500 cm -1 to 800 cm -1 . [15,16] the spectrum of the TiO 2 base particles by the chloride process also shows a characteristic peak at 1356 cm -1 , corresponding to the stretching vibration of the Al-O bond, [17] which is due to the addition of Al 2 O 3 as a converting agent in the production of the chloride process.…”

Section: Surface Structure Analysis Of Tiomentioning

confidence: 98%

Comparison of surface characteristics and dispersion properties of titanium dioxide base particles by sulfate and chloride processes

Quan,

Li,

Xiang

et al. 2024

Preprint

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The differences in the performance of titanium dioxide base particle dispersion both the sulfate and chloride processes were studied based on the differences in their surface properties. Scanning Electron Microscope, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscope, Thermogravimetry, and surface contact Angle measurements were used to characterize different base particle morphology, a surface hydroxyl group, and structural properties. The dispersion properties of different base particles were studied by the viscosity, particle size distribution, and Zeta potential of the dispersions at different pH and different dispersants. The results showed that the titanium dioxide base particles of the sulfate process had more surface hydroxyl number and surface energy than the titanium dioxide base particles of the chloride process, so it was more easily dispersed by water wetting. Therefore, the sulfate process has better dispersion properties.

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Section: Surface Structure Analysis Of Tiomentioning

confidence: 98%

Comparison of surface characteristics and dispersion properties of titanium dioxide base particles by sulfate and chloride processes

Quan,

Li,

Xiang

et al. 2024

Preprint

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“…Such a deposit was then annealed in the air atmosphere at, for example, 1000 °C, before and after which treatment, the chemical state of the Ta ions in IL was investigated by XPS, as shown in Figure 12 b. The peak positions of the Ta4f and Ta4d core levels indicated that the oxidation state before and after the air-annealing treatment remained basically +5, which was close to that of the Ta ions in a Ta ions-containing IL solution that was prepared by dissolving TaF 5 in the IL [ 68 ]. On the other hand, the peak intensities of the Ta core levels as a whole were found to significantly increase after the air-annealing treatment.…”

Section: Applications Of Vacuum-deposited Ilsmentioning

confidence: 99%

Recent Progress in Vacuum Engineering of Ionic Liquids

Matsumoto

2023

Molecules

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Since the discovery of ionic liquids (ILs) as a new class of liquid that can survive in a vacuum at room temperature, they have been aimed at being characterized with vacuum analysis techniques and used in vacuum processes for the last two decades. In this review, our state-of-the-art of the vacuum engineering of ILs will be introduced. Beginning with nanoscale vacuum deposition of IL films and their thickness-dependent ionic conductivity, there are presented some new applications of the ellipsometry to in situ monitoring of the thickness of IL films and their glass transitions, and of the surface thermal fluctuation spectroscopy to investigation of the rheological properties of IL films. Furthermore, IL-VLS (vapor-liquid-solid) growth, a vacuum deposition via IL, has been found successful, enhancing the crystallinity of vacuum-deposited crystals and films, and sometimes controlling their surface morphology and polymorphs. Among recent applications of ILs are the use of metal ions-containing IL and thin film nano IL gel. The former is proposed as a low temperature evaporation source of metals, such as Ta, in vacuum deposition, while the latter is demonstrated to work as a gate electrolyte in an electric double layer organic transistor.

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“…Coatings 2023, 13, 1182 2 of 16 On reference surfaces such as gold, [MMIm]TFSI [14], [EMIm]TFSI [15] or [OMIm] TFSI [14,16] show nearly no decomposition reactions, but on other more reactive substrates a strong interaction can be observed. For example, the interaction of Ni(111) with [MMIm]TFSI and [OMIm]TFSI [12], Cu(100) with [OMIm]TFSI [16] and magnesium with [Py 1,4 ]TFSI [17], tantalum with [Py 1,4 ]TFSI and [EMIm]TFSI [18] show that some of them exhibit clear IL decomposition reactions without any potential applied. Recently, Adhikari et al [19] demonstrated for 1,3-dimethylimidazolium bis(trifluoromethylsulfonyl)imides ([MMIm]TFSI) on Cu(111) using AFM, STM and XPS that partial decomposition of IL occurs at around 300 K, and these products form disordered islands and the intact IL continue to form ordered islands.…”

Section: Introductionmentioning

confidence: 99%

Interaction of Aluminum and Platinum Surfaces with the Ionic Liquids 1-Butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide and 1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide

2023

Self Cite

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The processes at the interface between ionic liquids (ILs) and metals are a key factor for understanding especially in electrochemical deposition, nanoscale tribology applications and batteries. In the present work, the interfaces of 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([Py1,4]TFSI) and 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIm]TFSI) and platinum and aluminum were investigated by depositing thin IL films and studying them with X-ray photoelectron spectroscopy (XPS) in ultrahigh vacuum. It is found that there is no evidence of a decomposition reaction of either IL on platinum; however, the imidazolium cation of [EMIm]TFSI shows a strong interaction with the surface in the monolayer regime. In contrast, [Py1,4]TFSI and [EMIm]TFSI show massive decomposition on the aluminum surface without applying any electrochemical potential. The spectra for the [TFSI]− anion components show cleavage of C-F or N-S bonds in both cases. Both cleavage of a single fluorine atom and complete cleavage were observed, leading to further decomposition reactions of the anion. Consequently, new components such as AlOOH, Al(OH)3, Al2S3, Al2(SO4)3 and AlF3 appear at the interface. In addition, there is also evidence of decomposition of the cation by the splitting off hydrogen atoms or parts of the alkyl chain in both ILs.

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Investigations on the electrochemistry and reactivity of tantalum species in 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide using X-ray photoelectron spectroscopy (in situ and ex-situ XPS)

Cited by 6 publications

References 51 publications

Comparison of surface characteristics and dispersion properties of titanium dioxide base particles by sulfate and chloride processes

Comparison of surface characteristics and dispersion properties of titanium dioxide base particles by sulfate and chloride processes

Recent Progress in Vacuum Engineering of Ionic Liquids

Interaction of Aluminum and Platinum Surfaces with the Ionic Liquids 1-Butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide and 1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide

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