Journal
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
Volume 231, Issue 1-2, Pages 181-189Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molcata.2005.01.017
Keywords
CeO2; redox property; 1,3-diol; dehydration; unsaturated alcohols; paired interacting orbital (PIO) theory
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CeO2 has specific catalytic activity for the selective dehydration of 1,3-diols to unsaturated alcohols. In order to clarify the catalytic mechanism. quantum calculation based on the paired interacting orbital (PIO) theory was adopted to 1,3-butanediol-CegO(18) cluster systems. Strong attractive interaction was observed between 1,3-butanediol and oxygen-defected CeO2 (111), where three in-phase interactions were confirmed between H atom at 2-position in 1,3-butanediol and Cc cation and between two OH groups and other Cc cations. In addition, out-of-phase interaction between H and C atom at 2-position was induced by the in-phase interaction between H atom and Cc cation at appropriate coordinate of 1,3-butanediol. The PIO results suggest that the dehydration of 1,3-diols initiates from the abstraction of H atom at 2-position in 1,3-butanediol adsorbed on an oxygen defect site on CeO2 (111) with tridentate coordination. (c) 2005 Elsevier B.V. All rights reserved.
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