Structural and redox properties of ceria in alumina-supported ceria catalyst supports

Article Abstract:

A new study aims to clarify the characteristics of the ceria entities contained in alumina-supported ceria catalyst supports.

Catalytic converters, Chemistry, Physical and theoretical, Physical chemistry

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Interfacial redox processes under CO/CO2 in a nanoceria-supported copper oxide catalyst

Article Abstract:

XRD, Raman, XAFS, XPS, and EPR techniques were used to characterize a catalyst of copper oxide supported on cerium oxide. The results indicated the presence of mainly CoO-related species highly dispersed over the nanosized ceria supported and essentially formed two types of species as a function of their degree of aggregation while isolated Cu(super 2+)cations constituted only a residual part of the copper component.

Industrial Gas Manufacturing, Industrial gases, Carbon Monoxide, Analysis, Spectra, Copper compounds, Chemical properties

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Influence of mutual platinum-dispersed ceria interactions on the promoting effect of ceria for the CO oxidation reaction in a Pt/CeO2/Al2O3 catalyst

Article Abstract:

Factors that influence the reactivity of an oxidized Pt/CeO2/Al2O3 catalyst for the CO-O2 reaction was investigated using characterization studies combined with catalytic activity tests. Results revealed that the presence of platinum and dispersed ceria in the catalyst enhances the low-temperature reducibility of the two components. Moreover, the most reducible sites in the catalyst are formed by platinum situated on bidimensional ceria patches located at the alumina surface. These results indicate that the sites are highly active for CO oxidation reaction.

Catalysts, Platinum compounds

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