Oxidation of Oxygen-Containing Compounds

The influence of surface hydrophihcity of catalyst on the oxidation of benzylal-cohol to benzaldehyde in aqueous solution has been investigated by Augugliaro et al. [34] using a synthetic titania catalyst with predominant anatase phase and titania P25. More hydrophilic catalyst was prepared by hydrolysis using TiCl4 as precursor. The comparative in situ ATR-FTIR results show that the selectivity to benzaldehyde is increased over the more hydrophilic catalyst. This is attributed to a lower ability of photocatalytic reaction products to adsorb at the surface. 

Chen et al. [35] studied the photocatalytic decomposition of formic acid over Pt/Ti02- The catalyst was prepared by impregnation of H2PtCl, on titania P25. The catalyst was illuminated by a 5 Hz, 70 mW, and 355 nm pulse laser. It is shown that the molecularly adsorbed formic acid is transformed to formate species. The HCOO species are oxidized to the corresponding radical. The latter decompose on electron holes to carbon dioxide HCOO + h — CO2. + I/2H2. The addition of water vapor accelerates the reaction and promotes the formation of hydrogen. The formation of labile radicals could be a reason that photocatalytic degradation pathways forming formate species are effective for mineralization. 

The adsorption of oxahc acid on anatase and rutile and the influence of UV irradiation have been studied in detail by Bahnemann et al. [37] by in situ 

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ET Denisov, NI Mitskevich, VE Agabekov. Liquid-Phase Oxidation of Oxygen-Containing Compounds. New York Consultants Bureau, 1977. 

Oxidation of Oxygen-containing Compounds (Alcohols, Carbonyl Compounds, Carboxylic Acids)... 

This article shows a variety of patterns of electrochemical oxidation of oxygen-containing compounds (alcohols, carbonyl compounds, and carboxylic acids), aiming to be helpful for both electroorganic and organic chemists to cover this field from a synthetic viewpoint. Since there have been excellent books [1-5] published on the subject, this article quotes only some typical and important papers from before 1990. 

Ruthenium-Catalysed Oxidation of Oxygen-Containing Compounds.297... 

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