Accession Number : AD0677568

Title :   THERMAL DESORPTION OF CARBON MONOXIDE FROM COPPER,

Corporate Author : BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH

Personal Author(s) : Smith,Alan W.

Report Date : OCT 1968

Pagination or Media Count : 18

Abstract : The thermal desorption of carbon monoxide adsorbed on copper has been studied. After ion bombardment cleaning, two thermal desorption peaks were observed. They followed second order kinetics, and had activation energies of 14.7 and 16 Kcal/mole. The pre-exponential factors were 3 x 10 to the 11th power and 5 x 10 to the 7th power/second. After annealing, the high temperature peak was absent unless the sample was exposed to a much greater amount of carbon monoxide. There was very little shift in the position of the low temperature peak with initial coverage. This suggests that the apparent second order peak is made up of states with first order kinetics but with differing activation entropies for desorption. Samples cleaned by oxidation followed by reduction gave similar results except that a definite shift of the peak with initial coverage was observed. (Author)

Descriptors :   (*CARBON MONOXIDE, SURFACES), (*COPPER, SURFACES), REACTION KINETICS, ANNEALING, CLEANING, ION BOMBARDMENT

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE