COI oxidation on a single Pd atom supported on magnesia.

Details

Serval ID
serval:BIB_22060
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
COI oxidation on a single Pd atom supported on magnesia.
Journal
Physical Review Letters
Author(s)
Abbet S., Heiz U., Häkkinen H., Landman U.
ISSN
0031-9007
Publication state
Published
Issued date
2001
Volume
86
Number
26 Pt 1
Pages
5950-3
Language
english
Abstract
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
Create date
19/11/2007 9:45
Last modification date
20/08/2019 12:58
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