Interaction of molecular oxygen with the vacuum-annealed TiO2(110) surface: molecular and dissociative channels

Article Abstract:

Isotopic labeling studies, temperature-programmed desorption (TPD), sticking probability measurements and electron energy loss spectroscopy (ELS) are used to study the interaction of molecular oxygen with the TiO2(110) surface. Results provide evidence for both molecular and dissociative channels with strong adsorption temperature between these channels and preference for the dissociative channel above the adsorption temperature of 150 K. ELS measurements indicate the presence of molecularly adsorbed O2 molecules on the surface as O2-. TPD results suggest that electron density associated with the oxygen vacancy sites is delocalized to nearby cation sites.

Oxygen, Titanium dioxide, Adsorption, Dissociation, Dissociation reactions

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Carbonate complexation of Mn(super 2+) in the aqueous phase: Redox behavior and ligand binding modes by electrochemistry and EPR spectroscopy

Article Abstract:

The redox behavior and complexation equilibria of Mn(super 2+) are investigated in aqueous solutions of bicarbonate by voltammetry and electron paramagnetic resonance (EPR) spectroscopy and the implications for the uptake of Mn(super 2+) by mangano-cluster enzymes such as photosystem II (PSII) are discussed. The derived molecular structures include Mn(super 2+)(HCO(sub 3)(super -))(OH2)(sub 4-5) for the 1 is to 1complex and Mn(super 2+=)(CO(sub 3)(super 2-))(HCO(sub 3)(super -))(OH2)(sub 3) for the 1 is to 2 complex.

Science & research, All Other Basic Inorganic Chemical Manufacturing, CHEMICALS AND ALLIED PRODUCTS, Other Basic Organic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Carbonates, Manganese Compounds, Ligand binding (Biochemistry), Chemical properties

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The influence of the bulk reduction state on the surface structure and morphology of rutile TiO2(110) single crystals

Article Abstract:

The colour (reduction state) of rutile crystals plays a significant role in the preparation of TiO(110) surfaces. Electron paramagnetic resonance has been used to characterize the bulk defects of five samples with different degrees of bulk reduction.

Crystals, Rutile

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