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Chemicals, plastics and rubber industries

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Study of the elementary processes involved in the selective oxidation of methane over MoO(sub x)/SiO(sub 2)

Article Abstract:

A MoO(sub x)/SiO(sub 2) catalyst prepared with a Mo loading of 0.44 Mo/nm(super 2) consisted of isolated, pentacoordinated molybdate species containing a single Mo=O bond. Raman spectroscopy results showed that these are reduced by H(sub 2) to molybdate species containing Mo(super IV) cations but methane and CO are not effective reducing agents hence active species for methane oxidation is a peroxide species formed by the reaction of oxygen with the low concentration of reduced molybdate species present on catalyst surface.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Molybdenum, Raman spectroscopy

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Synergistic active sites on SiO2-Al2O3-TiO2 photocatalysts for direct methane coupling

Article Abstract:

Photocatalytic systems have the potential to promote difficult reactions and are examined in both oxidative and nonoxidative systems for methane conversion. The results suggest that the pair sites consisting of the dispersed AlO4 and TiO4 species are responsible for a high activity of the SiO2-Al2O3-TiO2 photocatalyst in this reaction.

Aluminum, Chemical reactions, Titanium

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Electronic energy levels of organic dyes on silicon: A photoelectron spectroscopy study of ZnPc, F16ZnPc, and ZnTPP on p-Si(111):H

Article Abstract:

The alignment of energy levels and chemical interaction of the organic pigments ZnPc, substituted F16ZnPc, and ZnTPP on H-terminated Si(111) derived from valence band and core level photoelectron spectroscopy with high surface sensitivity for coverage below and in the monolayer region is reported.

Photoelectron spectroscopy, Zinc compounds

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