Oscillations during the interaction between carbon monoxide and oxygen on palladium-containing catalysts

Tenchev, K.; Petrov, L.; Savelieva, G. A.; Sass, A.S.

doi:10.1016/0926-860x(92)80023-6

Cited by 11 publications

(1 citation statement)

References 33 publications

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“…These results evidence that palladium was negatively influenced by cerium in the bimetallic system, although metallic dispersion was not significantly affected. Similar negative effect has been previously observed 17 with a 0.5%Pd-2%Ce/alumina catalyst in CO oxidation at temperatures lower than 250 °C. This suggests that the presence of cerium species modifies the nature of the palladium sites, provoking modifications in the Pd-CO bonding, and affecting its performance.…”

Section: Resultssupporting

confidence: 87%

Behavior of Fresh and Deactivated Combustion Promoter Additives

Carvalho

Morgado

Cerqueira

et al. 2004

Ind. Eng. Chem. Res.

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This work reports the behavior of fresh and deactivated monometallic (Pt, Pd) and bimetallic (Pd-Ce) alumina-based combustion promoters prepared in the laboratory. The different additives were tested in carbon monoxide oxidation reaction before and after hydrothermal deactivation. Among the tested samples the best activity in CO oxidation was obtained for the additive containing 660 ppm of palladium. The addition of 15% of cerium oxide to the palladium-based additive did not increase its performance.

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Section: Resultssupporting

confidence: 87%

Behavior of Fresh and Deactivated Combustion Promoter Additives

Carvalho

Morgado

Cerqueira

et al. 2004

Ind. Eng. Chem. Res.

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Palladium Nanoparticles Supported on Nitrogen‐Doped Carbon Nanofibers: Synthesis, Microstructure, Catalytic Properties, and Self‐Sustained Oscillation Phenomena in Carbon Monoxide Oxidation

et al. 2014

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The oxidation of CO over Pd nanoparticles supported on carbon nanofibers (CNFs) and N‐doped carbon nanofibers (N‐CNFs) has been studied. Investigation by scanning transmission electron microscopy together with electron energy‐loss spectroscopy revealed that Pd nanoparticles are located on the N‐CNFs surface patches that have a high concentration of N atoms. The N‐doping of CNFs was shown to change the electric conductivity of N‐CNFs and redox properties of Pd, which thus determines the self‐oscillatory behavior of the catalysts during CO oxidation, the type of oscillations, and the conditions of their generation. Mechanisms that underlie the effect of N in N‐CNFs on the electronic state of Pd as well as the occurrence of two types of oscillation mechanisms—the known redox mechanism and the mechanism related to Pd intercalation into graphene layers—are discussed.

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