o-p H2 conversion on noble metalsReportar como inadecuado

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Abstract : Electron-energy-loss experiments of H2 physisorbed at low temperatures on a Ag111 surface have indicated that the o-p H2 conversion rate is very fast , in contradiction with the usual belief that the catalyst must be magnetic to be efficient. We examine a large family of processes valid for non-magnetic and non-dissociative metals which physically convert the hydrogen molecules on the basis of the emission of metal electron-hole pairs. The importance of metal and molecule electron states in the processes is for the first time emphasized. 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.

Autor: E. Ilisca

Fuente: https://hal.archives-ouvertes.fr/


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