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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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Journal ArticleDOI
TL;DR: In this paper, the degradation of LiNi 0.8 Co 0.15 Al 0.05 O 2 (LNCAO), a cathode material in lithium-ion-batteries, was studied using in situ powder diffraction and in situ Ni K edge X-ray absorption spectroscopy.

91 citations

Journal ArticleDOI
TL;DR: In this article, it was shown that in the presence of boron, there is always a formation of extra-framework oxide clusters with an anatase-like structure identified by XANES at the Ti K-edge.

91 citations

Journal ArticleDOI
TL;DR: X-ray absorption spectroscopic studies have been systematically carried out for the new high-Tc superconducting intercalation compounds, (HgX2)0.5Bi2Sr2CaCu2Oy as mentioned in this paper.
Abstract: X-ray absorption spectroscopic studies have been systematically carried out for the new high-Tc superconducting intercalation compounds, (HgX2)0.5Bi2Sr2CaCu2Oy (X = Br and I), with a hybridized crystal lattice consisting of superconducting layer and insulating one. From the Hg LIII-edge EXAFS analysis, it is found for the first time that the intercalated mercuric halide is stabilized as a linear molecule with the bond distance (Hg−X) of 2.46 A for the HgBr2 intercalate and 2.65 A for the HgI2 one, respectively. These are cross-confirmed not only by micro-Raman studies but also by one-dimensional electron density mapping based on (00l) X-ray reflections, which is well consistent with the EXAFS fitting results. The present I LI- and Br K-edge XANES results indicate a partial electron transfer from the host lattice of Bi2Sr2CaCu2Oy to the intercalant HgX2 layer with the partial oxidations of Bi2O2 and CuO2 layers. And the latter was also observed clearly from the Bi LIII-edge XANES and Cu K-edge EXAFS analys...

91 citations

Journal ArticleDOI
TL;DR: In this paper, the defect content and the bonding modifications induced in BN thin films by ion implantation were studied using near-edge x-ray absorption fine structure (NEXAFS).
Abstract: Near‐edge x‐ray absorption fine structure (NEXAFS) has been used to study the defect content and the bonding modifications induced in BN thin films by ion implantation. The initial films were hexagonal‐like BN grown on Si(100) by pulsed laser deposition. Subsequent ion implantation with N2+ at 180 keV induces the formation of a significant proportion of sp3 bonding (cubic‐like), and the formation of nitrogen void defects in the remaining sp2 BN. These modifications in the bonding of a film lacking long range order can only be distinguished with a local order technique like NEXAFS.

91 citations

Journal ArticleDOI
TL;DR: In this article, the formation of carbonyl-like and amino-complexes at the metallic sites was studied by means of adsorption microcalorimetry, where CO and NH3 were used as probe molecules in order to assess the coordinative unsaturation of the Cu(I) cations.
Abstract: The oxidation state of Cu species dispersed in a Cu-ZSM-5 zeolite obtained by a nonconventional gas-phase CuCl exchange, and nominally containing only Cu(I) species, was studied by x-ray photoelectron spectroscopy (XPS) and x-ray absorption near edge structure (XANES) analyses. The oxidation of Cu(I) species to Cu(II) by simple exposure to the atmosphere and subsequent reduction by thermal activation in vacuo was monitored. The quantitative and energetic aspects of the formation of carbonyl-like and amino-complexes at the metallic sites was studied by means of adsorption microcalorimetry. CO and NH3 were used as probe molecules in order to assess the coordinative unsaturation of the Cu(I) cations. Adsorption heats comprised in the 130–40 kJ mol−1 interval were obtained for the formation of both type of complexes. The perturbation induced on the Cu centers and/or on the zeolite matrix by the adsorption of the probe molecules was monitored by parallel experiments of XPS, IR, and XANES. A significant fractio...

91 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023186
2022403
2021212
2020232
2019242
2018256