Please use this identifier to cite or link to this item: https://scholarhub.balamand.edu.lb/handle/uob/1965
Title: ESR Investigation of Active Sites in Ru/CeO2 Solids
Authors: Estephane, Jane 
Aouad, Samer 
Abi Aad, Edmond
Aboukaïs, Antoine
Affiliations: Department of Chemical Engineering 
Department of Chemistry 
Keywords: Surface properties
Electron spin resonance
Ruthenium
Subjects: Cerium oxides
Oxidation
Issue Date: 2016
Part of: Catalysis letters
Volume: 146
Issue: 3
Start page: 677
End page: 681
Abstract: 
Two Ru/CeO2 catalysts with Ru loadings of 1.65 and 5 wt% were prepared by wet impregnation. The adsorption of propylene or toluene led to two different ESR signals corresponding to two different catalytic sites. These two sites are present among the well dispersed ruthenium oxide species that reduce at ~74 °C. One site is un-reactive unless activated to remove adsorbed water while the second site is reactive at room temperature. Both sites are easily regenerated under oxidative atmosphere at 200 °C. These two sites are optimally obtained for calcination temperatures in the 500–600 °C interval and a Ru loading of 1.65 wt%. For Ru5Ce, the same reactive sites are present along with agglomerated ruthenium oxide species that are less reactive in oxidation reactions.
URI: https://scholarhub.balamand.edu.lb/handle/uob/1965
Ezproxy URL: Link to full text
Type: Journal Article
Appears in Collections:Department of Chemical Engineering

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