NO Reduction with CO on Copper and Ceria Oxides Supported on Alumina

Христова, M.; Ivanov, Branimir; Spassova, Ivanka; Spassov, Тony

doi:10.1007/s10562-007-9195-5

Cited by 14 publications

(4 citation statements)

References 22 publications

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“…It is reported that the reduction of dispersed CuO species to Cu 1? species takes place in low temperature region (below 300°C) [29][30][31]. The high temperature signal in the temperature range of 320-480°C can be attributed to the reduction of strongly interacted CuO species with the support to Cu 0 species or due to reduction of Cu 1?…”

Section: Catalyst Characterizationmentioning

confidence: 99%

Cu/SBA-15 is an Efficient Solvent-Free and Acid-Free Catalyst for the Rearrangement of Benzaldoxime into Benzamide

et al. 2011

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Cu/SBA-15 catalysts with various Cu loadings in the range of 5-20 wt% were prepared by an impregnation method and characterized by N 2 adsorption, X-ray diffraction, temperature programmed reduction and X-Ray photoelectron spectroscopic techniques. Cu/SBA-15 catalysts are found to be highly active and selective for the Beckmann rearrangement of benzaldoxime into benzamide under solvent-free and acid-free conditions.

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Section: Catalyst Characterizationmentioning

confidence: 99%

Cu/SBA-15 is an Efficient Solvent-Free and Acid-Free Catalyst for the Rearrangement of Benzaldoxime into Benzamide

et al. 2011

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“…Also, it has been found that metal/ceria interactions induced by the establishment of contacts between the two components strongly affect their redox properties and, as a consequence, their catalytic properties [25]. Recently, a Cu-Ce/Al 2 O 3 catalyst has shown promising properties for NO reduction with CO [26]. Cobalt-promoted Cu/CeO 2 and Cu-Ce/ Al 2 O 3 catalysts have been studied in oxidation reactions [27,28].…”

Section: Introductionmentioning

confidence: 99%

Influence of Ce addition on the catalytic behavior of alumina-supported Cu–Co catalysts in NO reduction with CO

Spassova

Velichkova

Nihtianova

et al. 2011

Journal of Colloid and Interface Science

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“…Cu/CeO 2 catalysts have shown good activity for various CO-involving reactions, such as WGSR, , CO oxidation, , NO reduction by CO, − and preferential CO oxidation in an excess H 2 stream. , Because Cu/CeO 2 is a good catalyst for WGSR, it might be able to produce H 2 at a low temperature for NO x reduction. In this work, we mixed a Cu/CeO 2 (CC) catalyst to a model LNT catalyst, Pt–BaO/CeO 2 (PBC), to enhance low-temperature activity for NO x removal.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Cu/CeO₂ and Pt–BaO/CeO₂ Catalysts for a Low-Temperature Lean NO_x Trap

Kim

Bae

et al. 2019

Environ. Sci. Technol.

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A lean NO x trap (LNT) catalyst has been widely used for removing NO x exhaust from lean-burn engines. However, the operation range of LNT has been limited because of the poor activity of LNT catalysts at low temperatures (≤300 °C), especially in urban driving conditions. To increase NO x removal efficiency during lean–rich cycle operation, a Cu/CeO2 (CC) catalyst was added to a Pt–BaO/CeO2 (PBC) catalyst. In comparison to PBC- or CC-only catalysts, the physical mixture of PBC and CC catalysts (PBC + CC) exhibited a significant synergy for both NO x storage and reduction efficiencies. In particular, low-temperature activity below 200 °C was greatly enhanced. A Pt–BaO–Cu/CeO2 (PBCC) catalyst, which was synthesized by depositing Pt and Cu together on a ceria support, showed poorer NO x removal efficiency. The origin of the synergistic effect over PBC + CC was investigated. Under lean conditions, the CC showed much better activity for NO oxidation, allowing for faster NO x storage on PBC. Under rich conditions, H2 was generated in situ on the CC by a water–gas shift reaction then accelerated the reduction of NO x , which had been stored on PBC, with a higher selectivity to N2. This simple modification in the catalyst can provide an important clue to enhance low-temperature activity of the commercial LNT system.

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NO Reduction with CO on Copper and Ceria Oxides Supported on Alumina

Cited by 14 publications

References 22 publications

Cu/SBA-15 is an Efficient Solvent-Free and Acid-Free Catalyst for the Rearrangement of Benzaldoxime into Benzamide

Cu/SBA-15 is an Efficient Solvent-Free and Acid-Free Catalyst for the Rearrangement of Benzaldoxime into Benzamide

Influence of Ce addition on the catalytic behavior of alumina-supported Cu–Co catalysts in NO reduction with CO

Synergistic Effect of Cu/CeO₂ and Pt–BaO/CeO₂ Catalysts for a Low-Temperature Lean NO_x Trap

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NO Reduction with CO on Copper and Ceria Oxides Supported on Alumina

Cited by 14 publications

References 22 publications

Cu/SBA-15 is an Efficient Solvent-Free and Acid-Free Catalyst for the Rearrangement of Benzaldoxime into Benzamide

Cu/SBA-15 is an Efficient Solvent-Free and Acid-Free Catalyst for the Rearrangement of Benzaldoxime into Benzamide

Influence of Ce addition on the catalytic behavior of alumina-supported Cu–Co catalysts in NO reduction with CO

Synergistic Effect of Cu/CeO2 and Pt–BaO/CeO2 Catalysts for a Low-Temperature Lean NOx Trap

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Synergistic Effect of Cu/CeO₂ and Pt–BaO/CeO₂ Catalysts for a Low-Temperature Lean NO_x Trap