TY - JOUR T1 - Intramolecular selective hydrogenation of cinnamaldehyde over CeO2-ZrO2-supported Pt catalysts JF - Journal of Catalysis Y1 - 2012 A1 - Bhogeswararao, Seemala A1 - Srinivas, D. KW - alpha KW - beta-Unsaturated aldehyde KW - Ceria-zirconia KW - Cinnamaldehyde KW - Hydrogenation KW - Promotion by alkali ions KW - Supported Pt catalyst AB -

Selective liquid phase hydrogenation of cinnamaldehyde is reported, for the first time, over CeO2, ZrO2, and CeO2-ZrO2-supported Pt catalysts. Cinnamyl alcohol is the selective product. These catalysts are highly active and selective even at 25 degrees C and found to be superior to most of the hitherto known supported Pt catalysts. Alkali addition (NaOH) has enhanced the performance of these catalysts. At an optimized reaction condition, 95.8% conversion of cinnamaldehyde and 93.4% selectivity of cinnamyl alcohol have been obtained. Acidity of the support (due to the presence of ZrO2 component) and higher electron density at Pt (due to CeO2 component) are attributed to be responsible for the superior catalytic activity of Pt supported on CeO2-ZrO2 composite material. (C) 2011 Elsevier Inc. All rights reserved.

PB - ACADEMIC PRESS INC ELSEVIER SCIENCE CY - 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA VL - 285 IS - 1 U3 - Foreign U4 - 5.787 ER -