Desulfurization reactions on Ni2P(001) and alpha-Mo2C(001) surfaces: Complex role of P and C sites

Article Abstract:

X-ray photoelectron spectroscopy and first-principles density-functional calculations were used to study the interaction of thiophene, H2S, and S2 with Ni2P(001), alpha-Mo2C(001), and polycrystalline MoC. Experimental and theoretical studies indicate that the rate-determining step in a hydrodesulfurization (HDS) process is the transformation of adsorbed sulfur into gaseous H2S.

Nickel Compounds, Chemistry, Physical and theoretical, Physical chemistry

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Preparation of supported gold nanoparticles by a modified incipient wetness impregnation method

Article Abstract:

The catalysts with various gold loadings are prepared by the modified impregnation procedure and the nature of the supported gold phase is characterized. The Au/Ti[O.sub.2] catalysts prepared by this modified procedure of impregnation are almost as active as those prepared by deposition-precipitation with urea in the CO oxidation reaction performed at room temperature.

Gold Compounds, Usage, Raman spectroscopy, Hydroxides, Structure, Nanoparticles

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Electron transfer at the gas-solid interface: Reaction of gas-phase MoCl(sub 5) with vanadium oxide supported on silica

Article Abstract:

An electron transfer at the gas-solid interface by means of the reaction at 30 degreeC of gas-phase MoCI(sub 5) with silica-supported vanadium oxide prepared by impregnation and calcinations is studied. The samples are characterized in situ by various spectroscopies, chemical analysis and electron microscopy.

Analysis, Electron transport, Magnetic properties, Vanadium compounds

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