Acetaldehyde photochemistry on TiO2(110)

Journal Article · Tue Jul 01 00:00:00 EDT 2008 · Surface Science, 602(13):2238-2249

DOI:https://doi.org/10.1016/j.susc.2008.04.045· OSTI ID:943402

Zehr, Robert T; Henderson, Michael A

The ultraviolet (UV) photon induced decomposition of acetaldehyde absorbed on the oxidized retile TIO2(110) surface was studied with photon stimulated desorption (PSD) and theral programmed desorption (TPD). Acetaldehyde desorbs molecularly from TiO2(110) with minor decomposition channels yielding butene on the reduced TiO2 surface and acetate on the oxidized TiO2 surface. Acetaldehyde absorbed on oxidized TiO2(110) undergoes a facile thermal reaction to form a photoactive acetaldehyde-oxygen complex. UV irradiation of the acetaldehyde-oxygen complex resulting in the ejection of methyl radical into gas phase and conversion of the surface bound fragment to formate.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 943402
• Report Number(s): PNNL-SA-60949; SUSCAS; 19804; KC0302010; TRN: US0900387
• Journal Information: Surface Science, 602(13):2238-2249, Vol. 602, Issue 13; ISSN 0039-6028
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACETALDEHYDE
ACETATES
BUTENES
DESORPTION
IRRADIATION
METHYL RADICALS
PHOTOCHEMISTRY
PHOTONS
Environmental Molecular Sciences Laboratory