XPS studies of oxidic model catalysts: Internal standards and oxidation numbers

Hopfengärtner, G.; Borgmann, D.; Rademacher, I.; Wedler, G.; Hums, Erich; Spitznagel, G. W.

doi:10.1016/0368-2048(93)80042-k

Cited by 121 publications

(41 citation statements)

References 30 publications

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“…As it is seen, V 2p 3/2 and V 2p 1/2 peaks for xerogel and annealed thin film are similar. The BE-values correspond to the V 5+ state of vanadium and agree well with those reported in [27][28][29]. The O 1s peak at BE = 530.32 eV corresponds to O 2− ions in V 2 O 5 [30].…”

Section: Resultssupporting

confidence: 86%

XPS and optical properties of sol-gel processed vanadium pentoxide films

Bondarenka¹

2008

Lithuanian J. Phys.

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Vanadium pentoxide xerogels were prepared by using sol-gel technology. As-prepared samples of xerogels were heated up to 580 K in order to remove the bonded water. The chemical composition of xerogel samples and thin films has been studied by X-ray photoelectron spectroscopy (XPS). XPS data have shown that pure V2O5 compound was formed. After thermal treatment, in the XPS spectra the main changes occurred in the vicinity of the O 1s peak due to the removal of water from xerogel. The optical properties of V2O5 films were studied by optical transmission and spectroscopic ellipsometry. Ellipsometric measurements have been carried out in the spectral range of 0.5-5.0 eV at 300 K. The changes in the optical spectra were observed after thermal annealing of as-prepared xerogel samples. The obtained data have shown that thermal treatment of V2O5 thin films has strongly influenced the optical transitions involving both localized and higher-lying conduction bands.

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Section: Resultssupporting

confidence: 86%

XPS and optical properties of sol-gel processed vanadium pentoxide films

Bondarenka¹

2008

Lithuanian J. Phys.

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“…These BE values correspond to the V 5+ state of vanadium and practically do not differ from those reported in [16]. O 1s peak at BE = 530.3 eV corresponds to the O 2− ions in V 2 O 5 [17].…”

Section: Sodium-vanadium Oxide Bronzesupporting

confidence: 57%

“…The O 1s peak consists of the main line at BE = 529.9 eV and two less intense lines at 532 and 534 eV. The main part (BE = 529.9 eV) of the oxygen is connected with the vanadium ions [16]. The lower amount at BE = 535 eV can be attributed to the sulphur-oxygen bindings [20,23,24] and at BE = 534 eV -to H 2 O [24].…”

Section: Sodium-vanadium Oxide Bronzementioning

confidence: 99%

Sol-gel synthesis and XPS characterization of vanadium oxide bronzes

Bondarenka¹

2006

Lithuanian J. Phys.

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The results of synthesis of the vanadium oxide bronzes NaV2O5, K4.3V6O16.2, and Rb4.4V6O16.1 are presented. The synthesis process can be described by three steps: the 1st -production of the sol by dissolving the necessary materials in H2O2 solution, the 2nd -fabrication of the gel by heating up to 350 K, and the 3rd -heating up to 580-780 K for the water removal from the gel. The chemical composition of obtained bronzes was examined by using X-ray photoelectron spectroscopy (XPS) method.

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“…Figure 3a-f shows typical high resolution XPS-spectra Ti2p core levels of coatings prepared at different nitrogen flow rates and temperatures, respectively. Titanium is represented by three main states, which correspond to (Ti,Al)N (455.6-455.7 eV, black), TiON (457.3-457.7 eV, blue) and TiO 2 (459.0-459.4 eV, red) [28][29][30]. The titanium states do not correlate with the nitrogen content as well as the preparation temperature of the samples.…”

Section: Xpsmentioning

confidence: 99%

XPS and AFM Investigations of Ti-Al-N Coatings Fabricated Using DC Magnetron Sputtering at Various Nitrogen Flow Rates and Deposition Temperatures

Obrosov

Gulyaev

Ratzke

et al. 2017

Metals

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Ti-Al-N coatings were deposited by direct current magnetron sputtering (DCMS) onto IN 718 at different nitrogen flow rates and deposition temperatures. The coatings' properties were characterized using atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS) as well as nanoindentation. It was found that higher deposition temperature leads to higher surface roughness and nitrogen flux influences the shape of grains. According to XPS, the bonding structure of all coatings exhibited the (Ti,Al)N phase. Mechanical properties depend on the Al content within the films. The coating with the best mechanical properties (deposited at 500 • C and 20 standard cubic centimeters per minute (sccm)) was further deposited onto tungsten carbide (WC) cutting tools for cylindrical turning experiments. A quasi-constant flank wear was observed until a machining volume of 23,500 mm 3 .

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XPS studies of oxidic model catalysts: Internal standards and oxidation numbers

Cited by 121 publications

References 30 publications

XPS and optical properties of sol-gel processed vanadium pentoxide films

XPS and optical properties of sol-gel processed vanadium pentoxide films

Sol-gel synthesis and XPS characterization of vanadium oxide bronzes

XPS and AFM Investigations of Ti-Al-N Coatings Fabricated Using DC Magnetron Sputtering at Various Nitrogen Flow Rates and Deposition Temperatures

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