Electron-Hole Pairs, Molecular Vibrations, and Rate Processes at Metal Surfaces

1982 ◽  
pp. 519-540 ◽  
Author(s):  
J. W. Gadzuk ◽  
Horia Metiu
Keyword(s):  
Metal Surfaces ◽  
Molecular Vibrations ◽  
Electron Hole ◽  
Rate Processes

ORTHO-PARA HYDROGEN CONVERSION ON METAL SURFACES

1991 ◽  
Vol 05 (18) ◽  
pp. 1191-1198 ◽  
Author(s):  
E. ILISCA
Keyword(s):  
Charge Transfer ◽  
Low Temperature ◽  
Metal Surfaces ◽  
Noble Metals ◽  
Large Family ◽  
Para Hydrogen ◽  
Electron Hole ◽  
Efficient Mechanism ◽  
Hydrogen Molecules ◽  
Metal Electron

EELS experiments of H 2 absorbed at low temperature on Noble Metals have indicated that the o-p H 2 conversion can be very fast on metals, even in absence of chemisorption, in contradiction with the usual belief that the catalyst must be magnetic to be efficient. We examine a large family of processes which convert the hydrogen molecules on the basis of the emission of metal electron-hole pairs. The most efficient mechanism found is the Coulomb-Contact one based on a virtual charge transfer, back and forth, from the metal to the molecule, having a rate in agreement with experiment.

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