COI oxidation on a single Pd atom supported on magnesia.

Détails

ID Serval
serval:BIB_22060
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
COI oxidation on a single Pd atom supported on magnesia.
Périodique
Physical Review Letters
Auteur(s)
Abbet S., Heiz U., Häkkinen H., Landman U.
ISSN
0031-9007
Statut éditorial
Publié
Date de publication
2001
Volume
86
Numéro
26 Pt 1
Pages
5950-3
Langue
anglais
Résumé
The oxidation of CO on single Pd atoms anchored to MgO(100) surface oxygen vacancies is studied with temperature-programmed-reaction mass spectrometry and infrared spectroscopy. In one-heating-cycle experiments, CO(2), formed from O(2) and CO preadsorbed at 90 K, is detected at 260 and 500 K. Ab-initio simulations suggest two reaction routes, with Pd(CO)(2)O(2) and PdCO(3)CO found as precursors for the low and high temperature channels, respectively. Both reactions result in annealing of the vacancy and induce migration and coalescence of the remaining Pd-CO to form larger clusters.
Pubmed
Création de la notice
19/11/2007 10:45
Dernière modification de la notice
20/08/2019 13:58
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