Abstract
The Kβ emission spectra of chromium in oxidic compounds were investigated by means of the fluorescent method. The origin of the main Kβ lines is discussed using MO theory and the dependence of the energy positions on the chemical bond is reported. The compounds studied include the oxides Cr 2O 3 CrO 2 and CrO 3, and the mixed copper chromium oxides CuCrO 2, CuCr 2O 4 and CuCrO 4. High-resolution chromium K-edge absorption spectra have been recorded using the synchroton radiation available at LURE (Orsay, France). The object of this investigation is to obtain further information about the chemical state analysis of chromium in catalysts: an evaluation of the atomic Cr(VI):Cr total ratio in Cu x Cr y O 4 catalysts is reported.
Published Version
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