Reaction of H2S with Si(100)

Article Abstract:

The dissociative adsorption of H2S on Si(100) and the subsequent desorption of hydrogen from and diffusion of sulphur into the same surface is investigated with the help of temperature-programmed desorption (TDP) and Auger electron spectroscopy (AES). The exponential decay of the sticking coefficient derived from the coverage dependence of the H2S adsorption at 25 degrees celsius is consistent with a two-step model for the adsorption kinetics.

Science & research, Research, Chemical reactions

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Theoretical study of the MoS (sub 2) (100) surface. A chemical potential analysis of sulfur and hydrogen coverage

Article Abstract:

The stability of the (100) molybdenum sulfide surface is studied using periodic DFT calculations taking into account various parameters such as temperature and the partial pressure ratios of hydrogen and hydrogen sulfide present in the surrounding atmosphere. Hydrodesufurization is the most important catalytic process used to remove sulfur from petroleum fractions.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Molybdenum, Density-functional theory

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Co adsorption on CoMo and NiMo sulfide catalysts: A combined IR and DFT study

Article Abstract:

A comparative study of experimental IR spectra and DFT calculations of carbon monoxide (Co) adsorption on CoMo and NiMo sulfide catalysts is conducted. Broad shoulders at low wavenumbers characterize the Mo centers adjacent to promoter atoms for NiMo and CoMo catalysts, indicating a partial decoration of the MoS (sub 2) edges by the promoter.

Carbon Monoxide, Molybdenum Compounds, Nickel Compounds, Density functional theory, Atomic properties

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