Investigation of the NO removal by CO on CuO–CoOx binary metal oxides supported on Ce0.67Zr0.33O2

Liu, Lianjun; Chen, Yu; Dong, Lihui; Zhu, Jun; Wan, Haiqin; Liu, Bin; Zhao, Bin; Zhu, Hua; Sun, Kening; Chen, Yi

doi:10.1016/j.apcatb.2009.02.021

Cited by 93 publications

(60 citation statements)

References 43 publications

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“…The N 2 yield of some reported copper-based catalysts was similar to that of 12CuOCZ at the high temperature of the CO + NO reaction [12,16,19,23], but was lower than that of 12CuOCZ at low temperature. Table S1 shows the reactivity for various catalysts in comparison with the 12CuOCZ catalyst.…”

Section: Catalytic Activity Of No + Comentioning

confidence: 66%

“…The Raman spectra of the xCuOCZ and CZ catalysts are shown in Figure 3. For the CZ sample, the strong peak at 453 cm −1 was attributed to the F 2g Raman active mode of the fluorite structure [16,20,36]. In addition, a peak at 619 cm −1 was also observed, corresponding to the defect-induced (D) in the cubic ceria fluoride phase [12,36].…”

Section: Raman Spectra Studiesmentioning

confidence: 90%

“…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%

“…The former three peaks were ascribed to bidentate nitrate (ν(N=O)) and monodentate nitrate (ν as (NO 2 )), respectively [1,11,20,41,42]. The IR (Infrared Radiation) peak at 1346 cm −1 was assigned to cis-hyponitrites (N 2 O 2 2− ) [16,20,43], and the IR peak at 1215 cm −1 was ascribed to the bidentate nitrite adsorbed on Cu 2+ [11]. The surface adsorbed NO x species on the CZ catalyst was detected at 1562 and 1461 cm −1 as shown in Figure S5a.…”

Section: Drifts Studiesmentioning

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: Catalytic Activity Of No + Comentioning

confidence: 66%

Section: Raman Spectra Studiesmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Drifts Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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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Co Single Atoms and CoO_x Nanoclusters Anchored on Ce_0.75Zr_0.25O₂ Synergistically Boosts the NO Reduction by CO

Liu,

Ji,

Liu

et al. 2023

Adv Funct Materials

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Achieving high NO conversion and N2 selectivity in selective catalytic reduction of NO by CO (CO‐SCR) in a wide operating temperature window, particularly in the presence of high O2 concentration, remains a big challenge. Herein, guided by density functional theory (DFT) calculations, a catalyst is rationally developed with dual active centers consisting of both Co single‐atoms (SAs) and CoOx nanoclusters (NCs) co‐anchored on Ce0.75Zr0.25O2 support (CZO), which show above 99.7% NO conversion and 100% N2 selectivity at 250–400 °C under 5 vol% O2. DFT calculation and experimental results confirm a strong interaction among Co SAs, CoOx NCs, and CZO support. Co SAs enhance CO adsorption and accompany the oxygen vacancies (OVs) formation in CZO, while the CoOx NCs promote both NO conversion to nitrate intermediate and the breakage of the NO bond at OVs, thus synergistically boosting the N2 formation.

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3D Hierarchical Core–Shell Nanostructured Arrays on Carbon Fibers as Catalysts for Direct Urea Fuel Cells

Senthilkumar

kumar

Manthiram

2017

Advanced Energy Materials

200

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reaction (OER), [4] which limited the stability of the catalyst and the DUFC performance.In general, OER occurs at the anodic surface under a higher electrode potential, and it is hypothesized that decreasing the anode UOR potential would effectively eliminate the OER. On the other hand, ORR suffers from sluggish reaction kinetics due to the large activation process involved in cleaving the double bonds in an O 2 molecule. [5] Despite the vast interest in this area, all reported DUFCs are based on precious metal ORR catalysts, including Pt/C, [1] Pd, [6] Pd/C@Ti, [7] and Ag/C, [2] which defeats the cost advantages of DUFCs. Furthermore, all of the efforts on DUFCs have been based on the use of two different catalysts for UOR and ORR. Recently, cobalt oxide (Co 3 O 4 )-based nanocatalysts have emerged as a potential bifunctional catalyst due to their ability to effectively eliminate the OER constraints and their preferable adsorption of O 2 molecules via the Pauling mode (Co … (O ads O)). [8] However, the UOR activity of Co 3 O 4 is hampered by the poisoning of the catalyst surface by the oxidation intermediates. [9] The peroxide species (HO 2− ) generated under an alkaline medium during the ORR deteriorates the catalytic stability of Co 3 O 4 . [10] These challenges could be overcome with a surface engineering of Co 3 O 4 nanostructures with specific UOR and ORR catalysts in the form of core-shell architectures.Furthermore, the conventional techniques used for the modification of DUFC electrodes with nanocatalysts involve tedious protocols such as substrate pretreatment, slurry preparation, tedious catalyst loading/coating, binder selection, blockage of active sites via binder, time consumption, high resistance, etc. [11] These difficulties could be circumvented if the nanocatalysts could be directly grown over the electrode materials. Accordingly, we present here a direct growth of core-shell nanostructures over carbon cloth (CC) fibers and address the challenges of Co 3 O 4 toward UOR and ORR electrokinetics via a decoration of Co 3 O 4 core with, respectively, NiO and MnO 2 shells. Results and DiscussionThe scanning electron microscopy (SEM) image of the bare CC (Figure 1a) clearly reveals the ordered woven structure with a smooth surface and interconnected 2D carbon fibers. From Figure 1b,c, it is clear that the CC nanofibers are homogeneously enveloped with the smooth surfaced and uniformly aligned Co 3 O 4 nanowires with sharp tips. The mean diameter and length of Co 3 O 4 nanowires are found to be 40 nm and 1.7 µm, respectively.Bifunctional cobalt oxide (Co 3 O 4 ) nanowire catalysts grown on carbon cloth (CC) fibers and their modification with nickel oxide (NiO) and manganese dioxide (MnO 2 ) to produce core-shell nanoarchitectures are explored as catalysts for urea oxidation reaction and oxygen reduction reaction in direct urea fuel cells (DUFC). Based on a systematic electrochemical characterization of the catalyst, the as-developed core-shell nanoarchitectures are optimized toward DUFC performance....

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Investigation of the NO removal by CO on CuO–CoOx binary metal oxides supported on Ce0.67Zr0.33O2

Cited by 93 publications

References 43 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

Co Single Atoms and CoO_x Nanoclusters Anchored on Ce_0.75Zr_0.25O₂ Synergistically Boosts the NO Reduction by CO

3D Hierarchical Core–Shell Nanostructured Arrays on Carbon Fibers as Catalysts for Direct Urea Fuel Cells

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Investigation of the NO removal by CO on CuO–CoOx binary metal oxides supported on Ce0.67Zr0.33O2

Cited by 93 publications

References 43 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

Co Single Atoms and CoOx Nanoclusters Anchored on Ce0.75Zr0.25O2 Synergistically Boosts the NO Reduction by CO

3D Hierarchical Core–Shell Nanostructured Arrays on Carbon Fibers as Catalysts for Direct Urea Fuel Cells

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Product

Resources

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Co Single Atoms and CoO_x Nanoclusters Anchored on Ce_0.75Zr_0.25O₂ Synergistically Boosts the NO Reduction by CO