A study of the structure of vanadium oxide dispersed on zirconia

Article Abstract:

The molecular structure of vanadium oxide dispersed on the high surface area of amorphous and crystalline zirconia was described using Raman and ultraviolet -vis diffuse reflectance spectroscopy. The experiments investigated the surface structures of vanadia and the effect of loading on the structure of dispersed vanadia. The findings demonstrate two-dimensional patches of vanadia that grow in response to loading. A relative zirconia scattering is observed during reduction. This was attributed to changes in the optical properties of the vanadia monolayer.

Molecular structure

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Reactivity of lattice oxygens present in V2O5(010): a periodic first-principles investigation

Article Abstract:

A study was conducted to analyze hydrogen adsorption on the V2O5(010) surface using density functional computations. Results indicated that the use of a periodic approach eliminates artifacts of the cluster technique. In addition, findings confirmed the effectiveness of using the density functional theory in examining the geometric, electronic and catalytic characteristics of transition metal oxide catalysts.

Usage, Oxygen, Hydrogen, Metallic oxides, Metal oxides, Density functionals, Density functional theory

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Effects of precursor composition on the local structure of Cu dispersed on mesoporous silica: A detailed X-ray absorption spectroscopy study

Article Abstract:

A low-temperature grafting approach using two Cu(super I) molecular precursors ([CuOSi(O(super t)Bu)3](sub 4) and [CuO(super t)Bu](sub 4) and a high-temperature exchange reaction using CuCl were utilized with a mesoporous silica support (SBA-15). This was done to investigate the effects of catalyst preparation on the nature of copper-support interactions and site speciation.

All Other Miscellaneous Chemical Product and Preparation Manufacturing, Catalysts, Chemical preparations, not elsewhere classified, Analysis, Copper, Chemical properties

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