On the surface of vanadium oxide supported on aluminas: UV and visible Raman spectroscopy, UV-visible diffuse reflectance spectroscopy, and temperature-programmed reduction studies

Article Abstract:

Vanadia species on aluminas with surface VO(sub x) density in the range 0.01-14.2 V/nm(super 2) is characterized by UV and visible Raman spectroscopy, UV-visible diffuse reflectance spectroscopy and temperature-programmed reduction in hydrogen. A demonstration that the alumina phase has little influence on the structure and reducibility of surface VO(sub x) species under either dehydrated or hydrated condition.

United Kingdom, Industrial Organic Chemicals, Cyclic Crude and Intermediate Manufacturing, Aromatic Hydrocarbons, Vanadium compounds

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UV-Raman characterization of iron peroxo adsorbates on Fe/MFI catalyst with high activity for NO(sub x) reduction

Article Abstract:

The interaction of O2 with Fe supported on zeolite MFI is investigated by the in situ UV Raman technique. In situ Raman data indicate that absorbed peroxide ions, O2(super 2-), are formed on the same catalysts with FE/Al = 1 even at 300 K.

Zeolites, Electric properties, Iron compounds, Thermal properties

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Bacterially produced manganese oxide and todorokite: UV Raman spectroscopic comparison

Article Abstract:

The assignment of Raman bands for todorokite mineral is presented. The mutual exclusion principal that should hold good for all MnO2 materials studied are discussed.

Manganese Compounds, Chemistry, Physical and theoretical, Physical chemistry

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