Topic
Chemical state
About: Chemical state is a research topic. Over the lifetime, 2378 publications have been published within this topic receiving 78183 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, X-ray absorption spectroscopy was applied to investigate NaAlH4 doped with 5 mol % TiCl3 by ball milling and showed that the Ti atoms are associated only with Ti as next neighbors in the ball-milled state as well as during subsequent desorption and absorption of hydrogen.
Abstract: X-ray absorption spectroscopy is applied to investigate NaAlH4 doped with 5 mol % TiCl3 by ball milling. XANES analysis indicates that after the ball milling Ti species are reduced from Ti (+3) to Ti (0). Release or absorption of hydrogen does not affect the chemical state obtained after ball milling. EXAFS analysis shows that the Ti atoms are associated only with Ti as next neighbors in the ball-milled state as well as during subsequent desorption and absorption of hydrogen. Furthermore, an increase of the particle size and an ordering of the local structure is seen to evolve with the desorption and the absorption of hydrogen.
3 citations
01 Jan 2018
TL;DR: X-ray photoelectron spectroscopy (XPS) is one of most thoroughly used surface science techniques, which provides information on chemical states of both adsorbates and substrates on the basis of core-level shifts of photoelectrons excited primarily with X-rays.
Abstract: X-ray photoelectron spectroscopy (XPS) is one of most thoroughly used surface science techniques, which provides information on chemical states of both adsorbates and substrates on the basis of core-level shifts of photoelectrons excited primarily with X-rays.
3 citations
TL;DR: In this article, the chemical state of Ni species supported on SiO 2 under CO and NO atmosphere was observed by in situ XAFS techniques, and the reversible and quantitative chemical state conversions between NiO and Ni(0) were clarified during the temperatureprogrammed reduction of NiO by CO and the temperature-programmed oxidation of Ni( 0) by NO.
3 citations
TL;DR: In this article, the structure and surface morphology of the films were investigated by X-ray diffraction (XRD) and atomic force microscopy (AFM) and the chemical states and chemical composition of the thin films were determined by Xray photoelectron spectroscopy near the surface.
Abstract: (La0.7Sr0.3)MnO3 (LSMO) thin films were grown on Si (100) substrate by using pulsed laser deposition (PLD) process. Both structure and surface morphology of the films were investigated by X-ray diffraction (XRD) and atomic force microscopy (AFM). Furthermore, the chemical states and chemical composition of the films were determined by X-ray photoelectron spectroscopy (XPS) near the surface. From XRD, the results indicate that the films grown on Si (100) substrates have a single pseudocubic perovskite phase structure with a high (100) orientation. The XPS results show that La, Sr and Mn exist mainly in the forms of perovskite structure and a SrO layer was found on outermost surface. The films resistivity emeasured under room temperature is 6.4´10-4 W×cm.
3 citations
TL;DR: In this paper, the influence of diamond-like carbon coatings on the corrosion resistance of zirconium is investigated, and the results demonstrate that the diamondlike carbon coating with a thickness of approximately 1 nm almost completely protects the metal film against oxidation.
Abstract: The influence of diamond-like carbon coatings on the corrosion resistance of zirconium is investigated. Zirconium films with a thickness of 20 nm and different thicknesses of carbon protective films are examined. The chemical state of atoms on the surface is characterized using the measured photoelectron, electron energy loss, and Auger electron spectra. The results obtained demonstrate that the diamond-like carbon coating with a thickness of approximately 1 nm almost completely protects the metal film against oxidation. These protective properties of the diamond-like carbon coatings are explained by their high chemical inertness and uniformity over the thickness.
3 citations