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Article
Tracing the Reaction Steps Involving Oxygen and IR Observable Species in Ethanol Photocatalytic Oxidation on TiO2
Journal of the American Chemical Society
  • Felipe Guzman, The University Of Akron
  • Steven Chuang, The University of Akron
Document Type
Article
Publication Date
1-19-2010
Abstract
The rate-determining step of ethanol photocatalytic oxidation was identified to be the adsorption of O2 by an infrared (IR) spectroscopy coupled with mass spectrometry method. Dosing O2 during reaction showed that adsorption of O2 controls the accumulation of photogenerated electrons and the formation of acetate (CH3COO−ad), acyl species (CH3COad), acetaldehyde (CH3CHOad), CO2, and H2O. Accumulation of CH3COO−ad on the TiO2 surface slowed down the conversion of ethanol to CO2 and H2O. Removal of CH3COO−ad from the TiO2 surface holds the key to accelerating the rate of ethanol photocatalytic oxidation. This study bridges the gap between results of nanosecond and millisecond transient absorption studies and those of minute scale photocatalytic oxidation studies.
Citation Information
Felipe Guzman and Steven Chuang. "Tracing the Reaction Steps Involving Oxygen and IR Observable Species in Ethanol Photocatalytic Oxidation on TiO2" Journal of the American Chemical Society Vol. 132 Iss. 5 (2010) p. 1502 - 1503
Available at: http://works.bepress.com/steven_chuang/26/