Photochemical dynamics of surface oriented molecules

Technical Report · Fri Jan 01 00:00:00 EST 1993

DOI:https://doi.org/10.2172/6341012· OSTI ID:6341012

Ho, W

Photodesorption and photoreaction was investigated using a mass spectrometer, on O[sub 2] alone and coadsorbed with CO on Pt(111) at 80 K. Desorption of O[sub 2] continues for 1 ps, indicating multiple excitation of adsorbed O[sub 2] by photogenerated hot electrons. The branching ratio for O[sub 2] desorption to CO[sub 2] product formation increases as the O[sub 2] is photoexcited by femtosecond light pulses, in contrast to the larger CO[sub 2] photoyield for nanosecond laser excitation.

• Research Organization: Cornell Univ., Ithaca, NY (United States). Dept. of Physics
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-91ER14205
• OSTI ID: 6341012
• Report Number(s): DOE/ER/14205-2; ON: DE93016289
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
OXYGEN
DESORPTION
PHOTOCHEMICAL REACTIONS
BRANCHING RATIO
CARBON DIOXIDE
LASER RADIATION
PLATINUM
PROGRESS REPORT
PULSED IRRADIATION
SURFACES
TEMPERATURE RANGE 0065-0273 K
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DOCUMENT TYPES
ELECTROMAGNETIC RADIATION
ELEMENTS
IRRADIATION
METALS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
RADIATIONS
SORPTION
TEMPERATURE RANGE
TRANSITION ELEMENTS
400500* - Photochemistry