Emf Measurements on Nanocrystalline Copper-Doped Ceria

Knauth, Philippe; Schwitzgebel, G.; Tschöpe, Andreas; Villain, S.

doi:10.1006/jssc.1998.7890

Cited by 47 publications

(28 citation statements)

References 13 publications

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“…Cu displays very limited solubility in CeO 2 [29] and has been shown to segregate at intragranular boundaries in monolithic samples. [30] www.afm-journal.de …”

Section: Structural Characterization Of Cu-ceomentioning

confidence: 99%

Flame‐Synthesized Ceria‐Supported Copper Dimers for Preferential Oxidation of CO

Kydd¹,

Teoh²,

Wong³

et al. 2009

Adv Funct Materials

122

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Rapid synthesis of CuCeO2 catalysts by flame spray pyrolysis produces highly active Cu dimer morphologies without the need for additional catalyst pretreatment. The active Cu component is enriched onto the CeO2 surface at concentrations higher than the nominal loading with no evidence of amorphous or crystalline CuO phase. Increasing the Cu content results in a morphological transition from isolated Cu monomers to oxygen‐bridged dimers and an associated increase in oxygen vacancy concentration. Dimer‐containing CuCeO2 catalysts display high levels of activity and selectivity in the low‐temperature preferential oxidation of CO. Experimental measurements and simulations suggest that the geometry of the dimer presents a comparatively ionic CuO bond at the catalyst surface. Further studies indicate that these ionic dimer species promote preferential CO oxidation at lower temperatures than observed for monomeric Cu species. This is the first report to explicitly propose and demonstrate that the structural distortion associated with the formation of Cu dimers directly induces increased bond ionicity at the catalyst surface and that these changes are responsible for improved catalytic activity.

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“…Cu displays very limited solubility in CeO 2 [29] and has been shown to segregate at intragranular boundaries in monolithic samples. [30] www.afm-journal.de …”

Section: Structural Characterization Of Cu-ceomentioning

confidence: 99%

Flame‐Synthesized Ceria‐Supported Copper Dimers for Preferential Oxidation of CO

Kydd¹,

Teoh²,

Wong³

et al. 2009

Adv Funct Materials

122

View full text Add to dashboard Cite

show abstract

“…Among them, copper or copper oxide on ceria is known to be an efficient catalyst for various reactions such as the total oxidations of CO, methanol and methane [4,5]. The role of ceria as a support for base metals is not only related to its oxygen storage capacity, but also to the ability of improving dispersion of the base metals.…”

Section: Introductionmentioning

confidence: 99%

Carbon monoxide oxidation over CuO/CeO2 catalysts

et al. 2004

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“…Many recent studies have shown that the activity of ceria-related catalysts in complete oxidation reactions are greatly enhanced not only by precious metals, but also by base metals [4]. Among these, copper or copper oxide on ceria is known to be an efficient catalyst for a variety of reactions, for example total oxidation of carbon monoxide, methanol, and methane [5,6]. The role of ceria as a support for base metals is not only related to its oxygen-storage capacity but also to its ability to improve the dispersion of the base metals.…”

Section: Introductionmentioning

confidence: 99%

Catalytic combustion of benzene over CuO/CeO2 catalysts prepared using the precipitation–deposition method

et al. 2011

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Catalytic combustion of benzene over CeO 2 -supported copper oxides has been investigated. The supported copper oxide catalysts were prepared by use of the precipitation-deposition method at different solution pH, and characterized by XRD, FT-IR, and TPR. CuO/CeO 2 catalysts prepared by use of this method contained highly dispersed copper oxide species at high loading ratio. The CuO supported on CeO 2 prepared at pH 7 had the highest activity, with conversion reaching almost 100% at 210°C. However, CuO supported on CeO 2 prepared without NaOH had poor activity. In addition, catalytic activity increased with increasing CuO loading ratio, with the 10 wt% loaded CuO/CeO 2 catalyst having the highest activity.

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Emf Measurements on Nanocrystalline Copper-Doped Ceria

Cited by 47 publications

References 13 publications

Flame‐Synthesized Ceria‐Supported Copper Dimers for Preferential Oxidation of CO

Flame‐Synthesized Ceria‐Supported Copper Dimers for Preferential Oxidation of CO

Carbon monoxide oxidation over CuO/CeO2 catalysts

Catalytic combustion of benzene over CuO/CeO2 catalysts prepared using the precipitation–deposition method

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