Electronic structure of Ti–Ni alloys: An XPS and NEXAFS study

Senkovskiy, Boris V.; Usachov, Dmitry Yu.; Fedorov, Alexander; Vilkov, O. Yu.; Shelyakov, A. V.; Adamchuk, V. K.

doi:10.1016/j.jallcom.2012.05.059

Cited by 34 publications

(27 citation statements)

References 34 publications

(48 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These chemical shifts can be correlated to the bonding nature in the alloy. Senkovskiy et al [33] investigated the electronic structure of Ti–Ni alloys by XPS and found that both of their BEs shift to higher values, up to 0.4 eV, compared to the pure elements. Since the core levels shifts were by a few tenths of eV to the same direction it was concluded that a charge transfer between Ti and Ni in the alloy is insignificant.…”

Section: Resultsmentioning

confidence: 99%

Surface Oxidation of TiNiSn (Half-Heusler) Alloy by Oxygen and Water Vapor

Appel

Cohen²,

Beeri³

et al. 2018

Materials

View full text Add to dashboard Cite

TiNiSn-based half-Heusler semiconducting compounds have the highest potential as n-type thermoelectric materials for the use at elevated temperatures. In order to use these compounds in a thermoelectric module, it is crucial to examine their behaviour at a working temperature (approximately 1000 K) under oxygen and a humid atmosphere. Auger electron spectroscopy (AES) and X-ray photoelectron spectroscopy (XPS) were utilized to study the surface composition and oxidation of the TiNiSn alloy at elevated temperatures. It was found that during heating in vacuum, Sn segregates to the surface. Exposing the alloy to oxygen at room temperature will cause surface oxidation of Ti to TiO2 and Ti2O3 and some minor oxidation of Sn. Oxidation at 1000 K induces Ti segregation to the surface, creating a titanium oxide layer composed of mainly TiO2 as well as Ti2O3 and TiO. Water vapor was found to be a weaker oxidative gas medium compared to oxygen.

show abstract

Section: Resultsmentioning

confidence: 99%

Surface Oxidation of TiNiSn (Half-Heusler) Alloy by Oxygen and Water Vapor

Appel

Cohen²,

Beeri³

et al. 2018

Materials

View full text Add to dashboard Cite

show abstract

“…The 0.5 eV energy shift further confirmed the formation of the CuNi alloy. Similar results can be found for TiNi alloys, which had a higher energy shift of 0.25–0.55 eV than pure Ni . This Ni 0 peak was very tiny for sample C, indicating that metallic Ni was easy to be oxidized to Ni 2+ in the sample.…”

Section: Resultsmentioning

confidence: 99%

Atomic Layer Deposition of Ni on Cu Nanoparticles for Methanol Synthesis from CO₂ Hydrogenation

et al. 2017

View full text Add to dashboard Cite

Bimetallic Ni1Cu8/γ‐Al2O3 catalysts were prepared by using atomic layer deposition (ALD) and impregnation methods. By combing N2 adsorption/desorption, N2O oxidation followed by H2 titration, X‐ray diffraction (XRD), transmission electron microscopy (TEM), and temperature‐programmed reduction (TPR), we showed the differences in the physicochemical properties of the bimetallic catalysts between the two methods. The results indicated that the sample prepared by the ALD method has a higher CH3OH yield (1.5 mmol g−1 h−1) than the sample obtained by the impregnation method (0.7 mmol g−1 h−1). The highly dispersed alloy particles and stronger interaction between Cu and Ni are the key factors for the enhanced catalytic performance of the sample prepared by the ALD method.

show abstract

“…. According to the literature, 2 p 3/2 and 2 p 1/2 of Ti 4+ appear at 458.7 and 464.3 eV, 2 p 3/2 peak at 453.8 ∼ 454.1 eV for metallic Ti and 454.8 eV for TiO. As shown in Fig.…”

Section: Resultsmentioning

confidence: 62%