A Highly active, time stable, and water resistant, Hombikat TiO2 supported Mn catalyst has been developed for the selective reduction of NO by NH3 [Eq. (1)]. The analogous Cu and Cr supported catalysts also provide 100 % N2 selectivity at ≤120°C. Lewis acidity, redox properties, and a high surface metal oxide concentration are essential for good catalytic performance.

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Benzyl alcohol is oxidized selectively to benzaldehyde with high yield, with a little formation of benzylbenzoate, by molecular oxygen over a reusable nano-size gold catalyst supported on U 3 O 8 , MgO, Al 2 O 3 or ZrO 2 in the absence of any solvent.Liquid phase oxidation of benzyl alcohol is an important preferred reaction practically for the production of chlorine-free benzaldehyde, without loss of carbon in the form of CO 2 (a geenhouse gas). The preparation of benzaldehyde by reacting benzyl alcohol with stoichiometric or excess amounts of potassium or ammonium permanganate in aqueous acidic medium 1 is not environmentally benign at all, because of the formation of a large amount of toxic waste. A few studies on the benzyl alcoholto-benzaldehyde oxidation by H 2 O 2 or O 2 in the presence of organic solvent, using different solid catalysts, such as Pd/C, 2 Pd(II) hydrotalcite, 3 Pd-Ag/pumice, 4 Ru-Co-Al hydrotalcite, 5 Ni-containing hydrotalcite 6,7 and nano-size NiO 2, 8 have been