Crystal-plane effects on surface and catalytic properties of Cu2O nanocrystals for NO reduction by CO

Zou, Weixin; Liu, Lichen; Zhang, Lei; Li, Lulu; Cao, Yuan; Wang, Xiaobo; Tang, Changjin

doi:10.1016/j.apcata.2015.08.021

Cited by 72 publications

(57 citation statements)

References 48 publications

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“…Meanwhile, the weak sintering resistance ability of CeO 2 can be compensated by the incorporation of Zr; in addition, CeO 2 redox capacity also can be enhanced. Dong and his group have reported the use of copper-based catalysts for the reaction of NO + CO [12,13,[15][16][17][18][19][20][21][22][23][24]. They suggested that the excellent performance of NO reduction and CO oxidation was attributed to the strong interaction between copper and the unique redox behavior of CeO 2 .…”

Section: Introductionmentioning

confidence: 99%

“…In the literature [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24], copper oxide supported on different oxides (e.g., SiO 2 , TiO 2 , Al 2 O 3 , CeO 2 ) has been tested in the reaction of NO + CO. Among these supports, CeO 2 has received special attention due to the role of the oxygen buffering center through the facile Ce 4+ /Ce 3+ redox cycle [1,25].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Surface Copper Species on NO + CO Reaction over xCuO-Ce0.9Zr0.1O2 Catalysts: In Situ DRIFTS Studies

Yuan

et al. 2016

Catalysts

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Abstract:In this work, the activity of xCuO-Ce 0.9 Zr 0.1 O 2 catalysts for the reaction of NO + CO was investigated. Especially, in situ DRIFTS was applied to investigate the surface species under the adsorption of NO and/or CO and the reaction of NO and CO to understand the key intermediates species and reaction process of NO + CO. The results suggest that the copper oxide species are well dispersed on the surface of the catalysts, which can be easily reduced to form Cu + species. The Cu + species are proposed to be important activity species. The results of this work also suggest that N 2 O 2 2− is likely an intermediate species that plays an important role in NO reduction by CO. Thus, more Cu + and highly dispersed copper oxide species are expected to be beneficial for the reaction of CO + NO over the xCuO-Ce 0.9 Zr 0.1 O 2 catalysts.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Surface Copper Species on NO + CO Reaction over xCuO-Ce0.9Zr0.1O2 Catalysts: In Situ DRIFTS Studies

Yuan

et al. 2016

Catalysts

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“…Noble metal‐based catalysts are often commercially used in the abatement of NO x , but due to their high costs and prominent scarcity,, considerable efforts have been made in order to develop non‐noble transition metal oxide catalysts as efficient alternatives in the catalytic NOx reduction . For instance, perovskite‐type mixed oxides, 12 copper, iron, cobalt, nickel, cerium oxides or mixtures of those,, have been investigated for this purpose.…”

Section: Introductionmentioning

confidence: 99%

Zirconia‐Supported Cobalt Catalysts: Activity and Selectivity in NO Reduction by CO

et al. 2017

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Cobalt catalysts supported on tetragonal and monoclinic zirconia were prepared using a one‐pot procedure through the incorporation of a Co3O4 colloidal suspension during the support synthesis and evaluated in the reaction of NO reduction by CO. A better dispersion of the active phase was obtained by this method when compared to the conventional impregnation one. Furthermore, the crystalline phase of zirconia in the supports had a crucial effect in the dispersion of the cobalt species, being that the pure tetragonal phase led to a higher dispersion of the active phase. The one‐pot prepared tetragonal zirconia led to cobalt active species that consisted in well‐dispersed small agglomerates of Co3O4 and Co2+ species as oxo‐ions which displayed the best catalytic performance among the studied catalysts, with the highest NO conversion (75%) and high selectivity to N2 (85%) at 300 °C. These results show that the one‐pot methodology employed in this work has a strong potential to produce suitable catalysts for the abatement of NOx emissions.

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“…250 8 8C, which should be attributed to the reduction of Cu 2 Oto Cu 0 . [42,43] ForC u 2 O@ZIF-8, the reduction temperature of Cu 2 Oc ore was lowered to 200 8 8C. This might be due to two reasons:1 )ZIF-8 confined Cu 2 On anocubes showed improved dispersion and prevented aggregation;2 )The ZIF-8 shell is conducive to the diffusion of gas reactant.…”

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confidence: 99%

Silica‐Protection‐Assisted Encapsulation of Cu₂O Nanocubes into a Metal–Organic Framework (ZIF‐8) To Provide a Composite Catalyst

Cheng

2018

Angewandte Chemie

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The integration of metal/metal oxide nanoparticles (NPs) into metal-organic frameworks (MOFs) to form composite materials has attracted great interest due to the broad range of applications.However,tod ate,i th as not been possible to encapsulate metastable NPs with high catalytic activity into MOFs,d ue to their instability during the preparation process.F or the first time,w eh ave successfully developed at emplate protection-sacrifice (TPS) method to encapsulate metastable NPs such as Cu 2 Oi nto MOFs.S iO 2 was used as both ap rotective shell for Cu 2 On anocubes and as acrificial template for forming ay olk-shell structure.T he obtained Cu 2 O@ZIF-8 composite exhibits excellent cycle stability in the catalytic hydrogenation of 4-nitrophenol with high activity.T his is the first report of aC u 2 O@MOF-type composite material. The TPS method provides an efficient strategy for encapsulating unstable active metal/metal oxide NPs into MOFs or maybe other porous materials. Conflict of interestTheauthors declare no conflict of interest.

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Crystal-plane effects on surface and catalytic properties of Cu2O nanocrystals for NO reduction by CO

Cited by 72 publications

References 48 publications

Effect of Surface Copper Species on NO + CO Reaction over xCuO-Ce0.9Zr0.1O2 Catalysts: In Situ DRIFTS Studies

Effect of Surface Copper Species on NO + CO Reaction over xCuO-Ce0.9Zr0.1O2 Catalysts: In Situ DRIFTS Studies

Zirconia‐Supported Cobalt Catalysts: Activity and Selectivity in NO Reduction by CO

Silica‐Protection‐Assisted Encapsulation of Cu₂O Nanocubes into a Metal–Organic Framework (ZIF‐8) To Provide a Composite Catalyst

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Crystal-plane effects on surface and catalytic properties of Cu2O nanocrystals for NO reduction by CO

Cited by 72 publications

References 48 publications

Effect of Surface Copper Species on NO + CO Reaction over xCuO-Ce0.9Zr0.1O2 Catalysts: In Situ DRIFTS Studies

Effect of Surface Copper Species on NO + CO Reaction over xCuO-Ce0.9Zr0.1O2 Catalysts: In Situ DRIFTS Studies

Zirconia‐Supported Cobalt Catalysts: Activity and Selectivity in NO Reduction by CO

Silica‐Protection‐Assisted Encapsulation of Cu2O Nanocubes into a Metal–Organic Framework (ZIF‐8) To Provide a Composite Catalyst

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Silica‐Protection‐Assisted Encapsulation of Cu₂O Nanocubes into a Metal–Organic Framework (ZIF‐8) To Provide a Composite Catalyst