A Japanese research group led by Professors J. Kawai (Kyoto University) and T. Yamamoto (Tokushima University) has recently published a series of high-resolution X-ray fluorescence spectra for supported vanadium oxide catalysts. The measurement was done with a double crystal spectrometer (Si 220 reflections with (+, +) arrangement), and the typical energy resolution was around 2.5 eV. The authors were successful in discussing quantitatively the difference in chemical states among the catalysts supported on the different oxides, amorphous SiO2, γ-Al2O3, and TiO2 (anatase/rutile = 7/3). For more information, see the paper, "Quantitative Chemical State Analysis of Supported Vanadium Oxide Catalysts by High Resolution Vanadium Kα Spectroscopy", T. Yamamoto et al., Anal. Chem., Article ASAP (DOI: 10.1021/ac102681z Publication Date (Web): February 8, 2011).
