Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 115, Issue 8, Pages 3385-3392Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp110429s
Keywords
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Funding
- Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences, U.S. Department of Energy [DE-ACO5-00OR22725]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-98CH10886]
- U.S. Government [DE-AC0S-00OR22725]
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This study reports the interaction of acetaldehyde with well-ordered CeOX(111) thin film surfaces. The fully oxidized CeO2(111) surface shows a weak interaction with I acetaldehyde with the sole desorption product (TPD) being the parent molecule at 210 K. The chemisorbed molecule binds to the surface as the eta(1)-acetaldehyde species rather than through a bridge-bonded dioxy configuration. Acetaldehyde chemisorbs strongly on reduced CeO2-X(111) with nonrecombinative and recombinative acetaldehyde desorbing at 405 and 550-600 K, respectively. Deoxygenation and dehydration also occur, producing ethylene and acetylene at 580 and 620 K, respectively. Acetaldehyde initially adsorbs in the eta(1) configuration and then converts to a carbanion species with both C=C and C=O bond character above 300 K.
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