Structural and catalytic characteristics of MoO3/CeO2 catalysts: CO oxidation activity

Mohamed, Mohamed Mokhtar; Katib, S. M. A.

doi:10.1016/j.apcata.2005.04.005

Cited by 38 publications

(22 citation statements)

References 36 publications

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“…S3 of ESI ⁎ ) further confirms the formation of h-MoO 3 (PDF#21-0569). It has been reported that the photo-catalytic properties of h-MoO 3 is superior to orthorhombic (o-MoO 3 ) and monoclinic MoO 3 (m-MoO 3 ) [18][19][20][21][22]. For the Ce-doped samples, however, the characteristic peaks of CeO 2 cannot be discerned, indicating that cerium ion has doped into the crystal lattice of MoO 3 and/or CeO 2 nanocrystals are highly dispersed on the surfaces of MoO 3 .…”

Section: Resultsmentioning

confidence: 90%

An efficient Ce-doped MoO3 catalyst and its photo-thermal catalytic synergetic degradation performance for dye pollutant

Liu

Jin

Teng

et al. 2015

Catalysis Communications

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Section: Resultsmentioning

confidence: 90%

An efficient Ce-doped MoO3 catalyst and its photo-thermal catalytic synergetic degradation performance for dye pollutant

Liu

Jin

Teng

et al. 2015

Catalysis Communications

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“…Molybdenum has also been regarded as possible element active for CO PROX. Mohamed et al have reported a good activity for the MoO 3 /CeO 2 prepared par co-precipitation [66]. The very good activity of supported copper catalyst has been largely demonstrated what explains that for the most part, the papers dedicated to CO PROX on transition metal oxide catalyst concern this element.…”

Section: Transition Metal Oxide Catalystsmentioning

confidence: 95%

Preferential Oxidation of Carbon Monoxide in the Presence of Hydrogen (PROX) over Noble Metals and Transition Metal Oxides: Advantages and Drawbacks

et al. 2008

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The steam reforming reaction of hydrocarbons and organic fuels, in general, is followed by a two-stage reaction of water gas shift, which allows increasing the hydrogen yield and a final purification step for CO removal to use hydrogen in an ammonia plant or a PEM fuel cell. This paper is focused on the CO Preferential Oxidation, CO PROX (or CO selective oxidation in excess hydrogen) reaction, considered as the simplest and cost effective process to achieve the less than 10 ppm CO. The objective of this paper is to review the performances of noble metals (Pt, Ru, Rh, Pd), gold and transition metal oxides catalysts in this reaction. Although the results reported are largely influenced by the experimental conditions (reactant flow composition, mass of catalyst, duration of experiment …) a comparison of advantages and drawbacks for each type of catalysts is proposed in terms of activity and selectivity as well as of CO 2 and H 2 O influences. A special attention will be paid to copper-doped ceria catalysts which appear to be very active and selective in a range of temperatures appropriate for fuel cell application. The performances, the stability and the low cost of these formulations compared to noble metal-based catalysts make them very attractive for an industrial application.

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“…Numerous composites have been applied to improve the catalytic activity toward CO oxidation. In recent years, much interest has been shown in the use of catalysts which contain binary or multiple metal oxides [5][6][7][8][9][10][11], such as, CoO x /CeO 2 [5], CuO/CeO 2 [6], Co-Cu-Ce/c-Al 2 O 3 [7], Co 3 O 4 /Al 2 O 3 [8], MoO 3 /CeO 2 [9], CeO 2 -ZrO 2 [10] and CuO/SnO 2 [11], all of which are effective in the oxidation of carbon monoxide. Interactions across the metal oxide interface have been suggested to be important, and carbon monoxide that is adsorbed on the metal reacts with the oxygen associated with the catalysts.…”

Section: Introductionmentioning

confidence: 99%

Abatement of Carbon Monoxide over CeO2–CoO x Catalysts: Effect of Preparation Method

2009

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Four CeO 2 -CoO x catalysts (containing 20% ceria) were prepared by impregnation, precipitation-oxidation, co-precipitation and hydrothermal methods (IMP, PO, CP and HT, respectively). They were characterized by X-ray diffraction, high-resolution transmittance electron microscopy, N 2 adsorption-desorption, X-ray photoelectron spectroscopy, and temperature-programmed reduction. The catalysts catalyzed CO oxidation in a continuous flow micro-reactor. These results demonstrate that the activity of CO oxidation depended on both the surface area of catalyst and dispersion of ceria. The IMP catalyst exhibited substantial dispersion of CeO 2 on the surface of CoO x and therefore the easiest release of oxygen to oxidize CO.

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Structural and catalytic characteristics of MoO3/CeO2 catalysts: CO oxidation activity

Cited by 38 publications

References 36 publications

An efficient Ce-doped MoO3 catalyst and its photo-thermal catalytic synergetic degradation performance for dye pollutant

An efficient Ce-doped MoO3 catalyst and its photo-thermal catalytic synergetic degradation performance for dye pollutant

Preferential Oxidation of Carbon Monoxide in the Presence of Hydrogen (PROX) over Noble Metals and Transition Metal Oxides: Advantages and Drawbacks

Abatement of Carbon Monoxide over CeO2–CoO x Catalysts: Effect of Preparation Method

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