Journal
CATALYSIS TODAY
Volume 203, Issue -, Pages 153-157Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cattod.2012.04.020
Keywords
Alcohol oxidation; Supported Ir catalyst; SMSI effect
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The catalytic activity of 2 wt% Ir/TiO2 in alcohol oxidation with molecular oxygen was enhanced by high-temperature reduction (673-873 K) of the catalyst in a hydrogen stream. Wide variety of alcohols were converted efficiently into corresponding carbonyl compounds with 2 wt% Ir/TiO2 reduced at 723 K. Kinetic analysis revealed that the alcohol adsorption was enhanced by high-temperature reduction of catalysts. Formation of partially reduced titanium oxide by high-temperature hydrogen reduction of TiO2-supported metal catalysts is a widely known phenomenon as the SMSI effect. The formed TiO(2-delta) species containing coordinatively unsaturated titanium sites might contribute to the enhancement of catalysis as a coordination site of alcohols. (C) 2012 Elsevier B. V. All rights reserved.
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