Deconvolution analysis of Ga K-edge XANES for quantification of gallium coordinations in oxide environments

Article Abstract:

A study was conducted to analyze gallium oxides supporting different crystal phases, crystallinity and dispersion states using X-ray absorption spectroscopy. A series of Ga2O3 samples were prepared in different ways to determine a wide structural variety of Ga2O3. Experimental results indicated that gallium atoms supporting different coordination symmetry can be quantitatively estimated using a deconvolution analysis of X-ray absorption spectroscopy.

Analysis, Oxides, Gallium, Crystallization, Absorption spectra

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Structural analysis of iron and manganese species in iron- and manganese-promoted sulfated zirconia

Article Abstract:

A study was conducted to analyze the structural characteristics of iron and manganese species in iron and manganese-promoted sulfated zirconia. XAFS, XRD and Raman spectroscopy were utilized to carry out the analysis. The Rigaku Rint 1300 diffractometer was utilized to obtain X-ray diffraction patterns. Results indicated that the presence of manganese species on the catalyst as alpha-Mn2O3 correlated with the absence of sulfate ions.

Manganese, Manganese (Metal), Ions, Iron, Iron (Metal), Zirconium oxide

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Characterization of li-doped MgO catalysts for oxidative coupling of methane by means of Mg k-Edge XANES

Article Abstract:

Structural analyses are carried out in the near surface and bulk phase of MgO in Li-doped MgO, by means of XRD, XPS, Mg K-edge XANES, and SEM techniques to characterize active defect sites. The defect species containing Li(super +)-O(super -) in both surface and bulk can act as the active species for producing C(sub 2) compounds with high selectivity is concluded.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Magnesium Oxide, Methods, Methane, Oxidation-reduction reaction, Oxidation reduction reactions, Chemical properties

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