NC-AFM observation of atomic scale structure of rutile-type Ti[O.sub.2](110) surface prepared by wet chemical process

Article Abstract:

The atomic scale structure of the rutile-type Ti[O.sub.2](110) surface prepared by the wet chemical method of chemical etching in an acid solution and thermal annealing in air was observed by ultrahigh vacuum (UHV) and noncontact atomic force microscopy (NC-AFM). The atomic scale structure of Ti[O.sub.2](110) was observed by UHV-NC-AFM measurements at 450K, which is above the desorption temperature of molecularly adsorbed water on the Ti[O.sub.2](110) surface but the UHV-NC-AFM measurements at room temperature, Ti[O.sub.2](110) structure could not be seen.

Observations, Atomic force microscopy, Properties

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Density functional theoretical calculations for a Co2/gamma-Al2O3 model catalyst: Structures of the gamma-Al2O3 bulk and surface and attachment sites for Co(super 2+) ions

Article Abstract:

First-principle density functional theory (DFT) calculations on the electronic state and structure of a [Co(super 2+)](sub 2)/gamma-Al2O3 model catalyst are performed in relation to catalysis for NO-CO reactions on a Co(super 2+) ensemble/gamma-Al2O3 catalyst. The results show that the vacant d orbitals of the two Co(super 2+) ions are directed toward each other, which might be the origin of the unique aspect of Co(super 2+) ensemble/gamma-Al2O3 catalysis.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Aluminum Oxide, Cobalt Compounds, Usage, Density functionals, Density functional theory

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Oxygen vacancy promoting catalytic dehydration of formic acid on TiO2(110) by in situ scanning tunneling microscopic observation

Article Abstract:

The catalytic dehydration reaction processes of formic acid on a TiO2(110) surface at 350 K is studied to visualize reaction intermediates and their dynamic behaviors by scanning tunneling microscopy. Oxygen vacancies on the surface that can be produced by dehydration of two hydroxyls in situ under the catalytic reaction conditions are essential for the reaction.

All Other Basic Organic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Formic Acid, Scanning tunneling microscopy

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