Topic
XANES
About: XANES is a research topic. Over the lifetime, 7737 publications have been published within this topic receiving 188032 citations.
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01 Jan 1966
TL;DR: In this article, a general formula has been developed for the fluctuations in the X-ray absorption coefficients observed on the high-energy side of an absorption edge, on the assumption that the ejected photoelectron undergoes inelastic collisions in the vicinity of the absorbing atom only.
Abstract: A general formula has been developed for the fluctuations in the X-ray absorption coefficients observed on the high-energy side of an absorption edge, on the assumption that the ejected photoelectron undergoes inelastic collisions in the vicinity of the absorbing atom only. For the intermediate energy range 50-250 eV the directional dependence of the scattering event has been taken into account by replacing the atoms at a given distance from the absorbing atom by a continuous distribution on a spherical shell of the same radius. The positions of the absorption maxima and minima have been calculated for copper and compared with experiment. Reasonable agreement has been found between the experimental results and the present calculations.
89 citations
TL;DR: In this article, the S L-edge X-ray absorption near edge structure (XANES) spectra of several inorganic and organic sulphur model compounds are presented.
89 citations
89 citations
TL;DR: In this paper, the atomic ratio of oxygen to platinum (O/Pt) for nano-sized platinum particles on the support was determined by the amount of desorbed oxygen in He carrier (O2-TPD) during elevated temperature.
Abstract: Quantitative determination of platinum oxidation state on supported platinum catalyst was examined by using Pt LIII-edge XANES spectra. The nano-sized platinum particles on the support were partially oxidized under oxidative atmosphere. The atomic ratio of oxygen to platinum (O/Pt) for these particles could be determined by the amount of desorbed oxygen in He carrier (O2-TPD) during elevated temperature. On the other hand, the XANES spectrum of the platinum catalysts oxidized under each corresponding condition was recorded under the same condition, then the area intensity of the white line of these spectra was evaluated by a simple simulation using a set of Gaussian and arctangent functions. A good linear relationship was confirmed between the white line intensity and the atomic ratio of oxygen to platinum, meaning that the oxidation state of the platinum could be quantitatively determined by a simple XANES analysis.
89 citations
TL;DR: In this article, the potential of synchrotron radiation techniques to understand the structural and electronic properties of coordination compounds is discussed, including the contribution arising from more specialized techniques that have become more widely used in the last years, such as the total scattering approach in the XRPD data analysis and X-ray emission spectroscopy.
89 citations