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Elsevier, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1-2(603), p. 185-187

DOI: 10.1016/j.nima.2009.03.004

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XAFS study of a Au/Al2O3 catalytic nanosystem doped by Ce and Ce-Zr oxides

Journal article published in 2009 by V. V. Kriventsov, I. L. Simakova, A. Simakov, E. Smolentseva, F. Castillon, M. Estrada, E. Vargas, E. P. Yakimchuk, D. P. Ivanov, D. G. Aksenov, D. V. Andreev, D. I. Kochubey, B. N. Novgorodov, S. Fuentes ORCID
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Abstract

This work is devoted to a structural study of the finely dispersed nanosized gold species supported on nanosized mixed oxides prepared by the sol-gel method. An analysis of the XANES (Au-L3) spectra has revealed mainly Au3+ cations located on the oxide matrix surface in distorted octahedral coordination for the catalysts reduced at 150 °C. For the catalysts reduced at 300 °C, a highly distorted metallic gold species has been mainly found, within the method limitation. The synthesized catalysts have also been characterized by transmission electron microscopy (TEM), BET, X-ray diffraction (XRD) and XPS.