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| Home > Publications database > Local structure of nanosized tungstates revealed by evolutionary algorithm |
| Journal Article | PUBDB-2015-03405 |
; ; ;
2015
Wiley-VCH
Weinheim
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Please use a persistent id in citations: doi:10.1002/pssa.201431561
Abstract: Nanostructured tungstates, such as CoWO$_{4}$ and CuWO$_{4}$, are very promising catalytic materials, particularly for photocatalytic oxidation of water. The high catalytic activity of tungstate nanoparticles partially is a result of their extremely small sizes, and, consequently, high surface-to-volume ratio. Therefore their properties depend strongly on the atomic structure, which differ significantly from that of the bulk material. X-ray absorption spectroscopy is a powerful technique to address the challenging problem of the local structure determination in nanomaterials. In order to fully exploit the structural information contained in X-ray absorption spectra, in this study we employ a novel evolutionary algorithm (EA) for the interpretation of the Co and Cu K-edges as well as the W L$_{3}$-edge extended X-ray absorption fine structure (EXAFS) of nanosized CoWO$_{4}$ and CuWO$_{4}$. The combined EA-EXAFS approach and simultaneous analysis of the W L$_{3}$ and Co(Cu) K-edge EXAFS spectra allowed us for the first time to obtain a 3D structure model of the tungstate nanoparticles and to explore in details the effect of size, temperature and transition metal type.
; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Nationallizenz
; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection
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