Selective CO oxidation in hydrogen-rich gas over CuO/CeO2 catalysts

Zou, Hanbo; Dong, Xinfa; Wang, Lin

doi:10.1016/j.apsusc.2006.06.028

Cited by 127 publications

(64 citation statements)

References 22 publications

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“…The profiles of samples with low copper content consist of a combination of three broad contributions, denoted as α, β and γ. According to literature [53,54] and to our analysis, the attribution of the TPR contributions is as follows: the first peak (α)…”

Section: A N U S C R I P Tmentioning

confidence: 92%

Preparation, characterisation and testing of CuO/Ce0.8Zr0.2O2 catalysts for NO oxidation to NO2 and mild temperature diesel soot combustion

Giménez-Mañogil

Bueno‐López

Garcı́a-Garcı́a

2014

Applied Catalysis B: Environmental

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Please cite this article as: J. Giménez-Mañogil, A. Bueno-López, A. García-García, Preparation, characterisation and testing of CuO/Ce 0.8 Zr 0.2 O 2 catalysts for NO oxidation to NO 2 and mild temperature diesel soot combustion., Applied Catalysis B, Environmental (2014), http://dx.doi.org/10. 1016/j.apcatb.2014.01.018 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractCuO/ceria-zirconia catalysts have been prepared, deeply characterised (N 2 adsorption-desorption isotherms at -196°C, XRD, Raman spectroscopy, XPS, TEM and H 2 -TPR) and tested for NO oxidation to NO 2 in TPR conditions, and for soot combustion at mild temperature (400ºC) in a NOx/O 2 stream. The behaviour has been compared to that of a reference Pt/alumina commercial catalyst. The ceria-zirconia support was prepared by the co-precipitation method, and different amounts of copper (0.5, 1, 2, 4 and 6 wt%) were loaded by incipient wetness impregnation.The results revealed that copper is well-dispersed onto the ceria-zirconia support for the catalysts with low copper loading and CuO particles were only identified by XRD in samples with 4 and 6% of copper. A very low loading of copper increases significantly the activity for the NO oxidation to NO 2 with regard to the ceria-zirconia support and an optimum was found for a 4%CuO/ceria-zirconia composition, showing a very high activity (54% at 348ºC). The soot combustion rate at 400ºC obtained with the 2%CuO/ceria-zirconia catalyst is slightly lower to that of 1%Pt/alumina in terms of mass of catalyst but higher in terms of price of catalyst.

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Section: A N U S C R I P Tmentioning

confidence: 92%

Preparation, characterisation and testing of CuO/Ce0.8Zr0.2O2 catalysts for NO oxidation to NO2 and mild temperature diesel soot combustion

Giménez-Mañogil

Bueno‐López

Garcı́a-Garcı́a

2014

Applied Catalysis B: Environmental

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“…5a-b. The CuO-CeO 2 system has been studied by many authors [9,[34][35][36], that identified different copper species. Thus, Avgouropoulos [9] showed that Cu could be present both as Cu 2?…”

Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 99%

CO Preferential Oxidation Activity of CuO/CeO2 Supported on Zirconium Doped Mesoporous MSU Type Silica

et al. 2009

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The activity of the CuO–CeO2 couple supported on a MSU silica doped with zirconium (Si/Zr = 7), was evaluated in the preferential oxidation of CO (CO-PROX) in hydrogen-rich gas stream (1.2% CO, 1.2% O2, 50% H2, 0–15% CO2, 0–10% H2O He balance) and the catalytic performance was compared with that of CuO–CeO2 supported on a pure MSU silica. The samples were characterized by X-ray powder diffraction (XRPD), N2 physisorption at 77 K, temperature-programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS). Correlations between catalytic performances and physico– chemical properties of the materials have been made

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“…The six components (882.3, 888.8, 898.4, 900.8, 907.2 and 916.7 eV) observed in the spectrum can be assigned to Ce(IV) species by comparison with data reported in the literature [19,20,21], whereas no signal corresponding to Ce(III) ion is seen in the spectra of AlCuCe and AlsCuCe catalysts. The catalyst AlCeCu shows an inconspicuous peak at 885.8 eV ascribed to the peak of Ce(III) in addition to the peaks of Ce(IV) [22,11]. The surface cerium concentration is determined to be: AlCuCe-0.8 at.%, AlsCuCe-0.6 at.%, AlCeCu-4.2 at.%.…”

Section: Xps Measurementsmentioning

confidence: 94%

“…Zou et al [11] has determined that the interfacial CuO and CeO 2 interaction and synergistic effect enhances the red-ox properties of CuO/CeO 2 catalyst and the highly dispersed copper species have been proposed as active sites for the selective CO oxidation.…”

Section: Introductionmentioning

confidence: 99%