X-ray photoelectron spectroscopy measurements

Figure 10.15. X-ray photoelectron spectroscopy measurements on prereduced Pd/LaCo03 into Pd0/CoO c/La2O3 after successive exposures under reaction conditions 0.15vol.% NO, 0.5vol.% H2 and 3 vol.% 02. Photopeaks Pd 3d and N Is recorded on the calcined sample in air at 400°C (a) after reduction in H2 at 500°C (b) after exposure under reaction conditions at 25°C (c) at 200°C for 30 min (d) at 300°C for 30 min (e) at 300°C for 2h (f) at 500°C for 30min (g) and at 500°C for 2h (h) (reproduced with permission from Ref. [117]).

An extremely rare example of a six-coordinate platinum(II) complex has been prepared by the reaction of [Pt(dmpe)2]2+ with three equivalents of I2 in H20/EtOH solution which affords black crystals of [PtI(dmpe)2(K-I2)]I3 (102). X-ray crystallography reveals a neutral I2 ligand that is coordinated to the metal center through one of the iodine atoms.278 XPS (X-ray photoelectron spectroscopy) measurements are consistent with the platinum center having a +2 oxidation state. 

Laachir, A., Perrischon, V., Badri, A., Lamotte, J., Catherine, E., Lavalley, J.C., El Fallah, J., Hilaire, L., Le Normand, F., Quemere, E., Sauvion, G.N., and Touret, O. 1991. Reduction of Ce02 by hydrogen. Magnetic susceptibility and Fourier-transform infrared, ultraviolet and x-ray photoelectron spectroscopy measurements. J. Chem. Soc. Faraday Trans. 87 1601-10. 

X-ray photoelectron spectroscopy measures the energy distribution of the core electrons emitted from a compound on irradiation with X rays.68 69 The electron... 

J.C. Fuggle, S.F. Alvarado, Core-level lifetimes as determined by x-ray photoelectron spectroscopy measurements, Phys. Rev. A 22 (1980) 1615. 

Fluorescence measurements of the differently funtionalized quartz slides in acetonitrile showed the characteristic emission of each fluorophore, confirming the successful attachment of the fluorophore on the monolayer.1 Each layer was characterized by contact angle, ellipsometry and X-ray photoelectron spectroscopy measurements, confirming the introduction of the different building blocks. 

It seems likely that aromatic amines which are found in liquefaction products have been produced by a combination of thermolysis and hydrogenation. There is no evidence for aromatic amines in coals from either selective oxidation degradations (22) or from direct X-ray Photoelectron Spectroscopy measurements (23). Oxidations would produce very stable nitroaromatics which are not seen. Another possible structure for this formula is phenoxazine(Vb). Such a molecule would not survive high temperature combined with long reaction times. Although annelated thiophene with a pyrrole(VI) would appear to be a likely structure in coal, there is no evidence for its existence in any of the coal derived materials. 

Xiu et al. [23] reported in Bi-doped ZnO films by molecular-beam epitaxy that Bi-induced acceptor ionization energy was estimated to be 0.185-0.245 eV by photoluminescence measurements based on the donor-acceptor pair peak position in the Bi-doped ZnO films Bi in ZnO films had positive charge state determined by X-ray photoelectron spectroscopy measurements, indicating that BiZn at Zn sites, rather than Bio at O sites, was formed in the films. BiZn itself, however, is a donor. The origin of the shallow acceptor states was, therefore, identified as a donor-acceptor pair such as BiZn-VZn-0, or BiZn-2VZn complexes. 

The sputtered (001) surface produced methanol as the primary high-temperature desorption product - more than half of the methoxy species present on the surface at 400 K recombined to form methanol at 580 K. The balance of surface methoxides decomposed into methane and CO in a 2 1 ratio between 590 and 600 K. X-ray photoelectron spectroscopy measurements for methanol adsorbed on the sputtered (001) surface at 300 K demonstrated that two types of carbon-containing species were present on the surface subsequent flashing to... 

Stakkestad, G. et al.. Surface chemistry of lanthanum chromite powders 11. Multivariate data modelling of the isoelectiic point hy the use of surface composition data achieved from X-ray photoelectron spectroscopy measurements, Colloid Polym. Sci. 277, 627, 1999. 

Studies by a group at the Shell Laboratories in Amsterdam (73) have been reported as evidence of interaction between platinum and rhenium in catalysts containing these two elements. These workers, on the basis of infrared spectroscopy studies of carbon monoxide chemisorbed on platinum-rhenium catalysts, and also of X-ray photoelectron spectroscopy measurements on the catalysts, concluded that platinum-rhenium bonds are present in the surface. 

Because of their large charge separations and dipole moments, mesionic thiadiazoles are suitable for examination by X-ray photoelectron spectroscopy. Measurements performed on (205) and (206) (as well as on phenyl-sydnone) confirm the view that a betaine structure predominates in the... 

Canas, A Ariza, MJ Benavente, J. Characterization of active and porous sublayers of a composite reverse osmosis membrane by impedance spectroscopy, streaming and membrane potentials, salt diffusion and X-ray photoelectron spectroscopy measurements. Journal of Membrane Science, 2001, 183,135-146. 

Due to the compositional inhomogeneity, it has been found that applying a significant bias on the electrode can induce changes in the resistance of a LSCF film decreasing the resistance by a cathodic treatment and vice versa increasing the resistance by an anodic treatment. XPS (X-ray photoelectron spectroscopy) measurements showed that the changes in resistance were correlated with the surfece composition of Sr. The cathodic treatment increases the Sr surface composition and decreases the resistance and vice versa for an anodic treatment [41]. 

ISO 14701 2011 Surface chemical analysis - X-ray photoelectron spectroscopy — Measurement of silicon oxide thickness... 

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