Polarization-dependent total-reflection fluorescence XAFS study of Mo oxides on a rutile TiO2(110) single crystal surface

Article Abstract:

Polarization-dependent total-reflection fluorescence x-ray absorption fine structure (PTRF-EXAFS) spectroscopy has been used in studying the structure of well-dispersed Mo oxides on TiO2(110) at three different directions of the single-crystal surface. Emphasis has been given on interactions between Mo and TiO2 surface which may determine the Mo oxide structure. Results indicate that anisotropic Mo dimers were preferentially formed on the TiO2(110) surface with Mo-Mo distance of O.335 nm parallel to the (110) direction of the surface.

Crystals, Crystal structure, Thin films, Molybdenum oxides

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Stepwise synthesis and structure analysis of Mo dimers in NaY zeolite

Article Abstract:

A study on the use of zeolites as crystalline microporous materials was conducted to investigate the behavior and structure of a molybdenum (Mo) species. These Mo species were prepared by the deposition and subsequent thermal decomposition processes of Mo(CO)6 in NaY at 573 K to furnish an example of a stepwise synthesis of homogeneous Mo species in supercages. Experimental methodology and results are discussed.

Research, Zeolites, Molecular sieves, Molybdenum

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Three-dimensional structure analyses of Cu species dispersed on TiO2(110) surfaces studied by polarization-dependent total-reflection fluorescence X-ray absorption fine structure (PTRF-XAFS)

Article Abstract:

Three-dimensional analysis of structures for dispersed Cu species on a TiO2(110) surface is performed by a polarization-dependent total-reflection fluorescence X-ray absorption fine structure (PTRF-XAFS) technique. The small Cu3 cluster is found to stabilize by the strong interaction between the Cu atoms and the bridging oxygen atoms that provide the anisotropic orientation.

Copper, Titanium dioxide, Structure, Atomic properties

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