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Optical Engineering

Laser Applications To Heterogeneous Catalysis: Reactant Excitation And Product Diagnostics
Author(s): M. E. Umstead; L. D. Talley; D. E. Tevault; M. C. Lin
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Paper Abstract

Irradiation of gaseous NO2 with the 488 nm line of an argon ion laser during its reaction with C2H4 over a Pt catalyst at 250 C resulted in up to a fourfold increase in the CO2 product yield. This enhancement is believed to result from the reaction of vibrationally excited NO2 with adsorbed C2H4 or a species derived from it. The observed effect disappeared after a period of time due to surface poisoning. Hydroxyl radicals have been detected leaving the surface of Pt and Rh-Pt catalysts during the reaction of H2 and 02 at 600-800 C. The OH radical was detected by its fluorescence at 340 nm induced by a dye laser, both in the gas phase and in an Ar matrix at 10 K. The activation energies for OH production from Pt and Rh-Pt surfaces have been determined.

Paper Details

Date Published: 1 February 1980
PDF: 6 pages
Opt. Eng. 19(1) doi: 10.1117/12.7972473
Published in: Optical Engineering Volume 19, Issue 1
Show Author Affiliations
M. E. Umstead, Naval Research Laboratory (United States)
L. D. Talley, Naval Research Laboratory (United States)
D. E. Tevault, Naval Research Laboratory (United States)
M. C. Lin, Naval Research Laboratory (United States)


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