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Title: EPR simulation to confirm the formation of Ag6O5 complex on the surface of 10% Ag/CeO2 catalyst after the propylene oxidation reaction
Authors: Hany, Sara
Skaf, Mira
Aouad, Samer 
Gennequin, Cédric
Labaki, Madona
Abi Aad, Edmond
AbouKais, Antoine
Affiliations: Department of Chemistry 
Keywords: Ag2+
Issue Date: 2018
Part of: Journal of chemical physics letters
Volume: 703
Start page: 94
End page: 96
Ag2+(b) species were detected by electron paramagnetic resonance (EPR) on silver loaded over ceria by impregnation in a previous work. Contrasting the EPR simulation with the experimental measurements evidenced that, upon propene oxidation, the Ag2+(b) species transform into two clusters each containing 2 Ag2+ and 1 Ag+ species. This cluster is composed of two parallel electron spins (dimer) and three nuclear spins (trimer). Such a result led us to suggest that initially, Ag2+(b) species clusters were formed by three parallel electron spins. The ferromagnetic character of Ag2+(b) species may explain their catalytic performance towards total oxidation of propylene.
DOI: 10.1016/j.cplett.2018.05.019
Ezproxy URL: Link to full text
Type: Journal Article
Appears in Collections:Department of Chemistry

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