In-situ XAS study on the Cu and Ce local structural changes in a CuO–CeO2/Al2O3 catalyst under propane reduction and re-oxidation

Abstract

, et al.. In situ XAS study on the Cu and Ce local structural changes in a CuO-CeO/AlO catalyst under propane reduction and re-oxidation. Journal of Physics and Chemistry of Solids, Elsevier, 2009, 70 (9) This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.A c c e p t e d m a n u s c r i p t

A laboratory-based double X-ray spectrometer for simultaneous X-ray emission and X-ray absorption studies

“…the number of counts registered in the full pixel range was summed in groups of 5 neighbouring pixels. The energy calibration was done by tting the positions of spectral features in the obtained spectral curves and of the corresponding ones in the reference data [40][41][42][43][44] assuming the Bragg's-law form of the pixel-toenergy conversion function.…”

Luminescence and x-ray absorption measurements of persistent SrAl2O4:Eu,Dy powders: Evidence for valence state changes

“…The reason for this energy difference is the lower binding energy of the core electrons in Eu 2+ caused by the shielding of the nucleus by the additional 4f electron. These spectra were analyzed by fitting procedures in which the white line transitions are approximated with pseudoVoight curves and the absorption step by an arctangent function 24,25 , to determine the peak area ratio between Eu 3+ and Eu 2+ as a function of x-ray irradiation time (Fig. 6).…”

In situ X-ray absorption spectroscopy study of CuO–NiO/CeO2–ZrO2 oxides: redox characterization and its effect in catalytic performance for partial oxidation of methane

“…12a the linear combination tting results are presented for the CuO-NiO/ZDC in the Cu K-edge. In it, a small peak with its maxima at 388 C is exhibited which corresponds to the Cu + formation and 37 In this case, a mild reduction was carried out since feed composition was of 5 mol% H 2 /He and the temperature ramp was of 10 C min À1 , indicating that these set of conditions were adequate to prompt a Cu + mediated reduction. Although no traces of Cu 2 O were detected aer TPR experiments by means of XPD, as shown in Fig.…”