Enhanced catalytic performance for CO oxidation and preferential CO oxidation over CuO/CeO2 catalysts synthesized from metal organic framework: Effects of preparation methods

Zhang, Xiaodong; Song, Liang; Hou, Fulin; Yang, Yiqiang; Wang, Yuxin; Liu, Ning

doi:10.1016/j.ijhydene.2018.08.060

Cited by 173 publications

(38 citation statements)

References 45 publications

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“…Although the 1 M-120°C sample exhibits lattice distortion due to the incorporation of Cu 2 + ions into the ceria lattice, the former presents high amount of surface Ce 3 + ions. [6,44,47,54] Indeed, taking as example the 1 M-120°C catalyst, this sample presents the lowest Cu sat /Cu 2p3/2 ratio (0.44) among the other samples, indicating the high reduction degree of copper species. [56] Concerning the second case, although the 0.1 M-150°C catalyst presents high intensity ratio I (600 + 1174) /I 464 (0.432), it is not accompanied with a high concentration of surface oxygen vacancies.…”

Section: Physicochemical Characterizationmentioning

confidence: 87%

“…[42,45,47] For example, the most active sample, i. e. 1 M-120°C, presents a high I (600 + 1174) /I 464 ratio (Table 2) and a relative high amount of Ce 3 + ions (Table 3) (ii) although the 1 M-150°C sample exhibits the highest surface area among the examined catalysts (225 m 2 g À 1 ), it cannot compete the catalytic performance of the 1 M-120°C catalyst, which presents 5 times lower surface area. Interestingly, the specific surface area is not a critical factor in order to achieve high activity and selectivity.…”

Section: Catalytic Studiesmentioning

confidence: 99%

“…[27] During the last years, copper-cerium mixed oxide catalysts have been considered as an effective substitute for precious metals catalysts in the CO-PROX reaction not only in terms of activity and selectivity but also due to the low cost. [14,36,42,[44][45][46][47] For instance, Gurbani et al [36] synthesized a CuOÀ CeO 2 catalyst via a sol-gel method, which exhibited slightly better catalytic behavior than the sample prepared by urea-combustion technique. [33][34][35] The enhanced catalytic performance of CuÀ Ce oxide catalysts can be attributed to a synergistic effect between copper oxide and ceria, since the copper oxide-ceria interfacial sites are mainly related with CO oxidation activity.…”

Section: Introductionmentioning

confidence: 99%

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Influence of the Hydrothermal Parameters on the Physicochemical Characteristics of Cu−Ce Oxide Nanostructures

Kappis

2019

ChemCatChem

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A series of highly active and selective CuCeO x catalysts was prepared via appropriate tuning of the parameters (concentration, temperature) of a citrates-hydrothermal method. The obtained catalysts were characterized by various physicochemical techniques such as (in-situ) X-ray diffraction (XRD), N 2 adsorption-desorption, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM), while preferential oxidation of CO (CO-PROX) in H 2 -rich stream was used as probe reaction. Suitable modification of the hydrothermal parameters resulted in catalysts with remarkable performance in CO-PROX reaction, which was strongly dependent on the concentration of oxygen vacancies and reduced copper species.

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Section: Physicochemical Characterizationmentioning

confidence: 87%

Section: Catalytic Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of the Hydrothermal Parameters on the Physicochemical Characteristics of Cu−Ce Oxide Nanostructures

Kappis

2019

ChemCatChem

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“…27 For many carbon materials, they not only possess higher ORR activity (eg, heteroatoms-doped fullerene mentioned above) but also have excellent catalytic activity for CO oxidation, such as heteroatoms-doped graphene. 28,29 Besides, some kinds of CO oxidation catalysts such as metal-based material [30][31][32][33][34] and amorphous metal-organic frameworks (MOFs) 35 have been studied in detail. The current paper mainly focuses on the ORR and CO oxidation reaction catalyzed by metal-fullerene C 58 M (M = Mn, Ni, Co, Fe, and Cu).…”

Section: Introductionmentioning

confidence: 99%

Exploring the catalytic activity of metal‐fullerene C ₅₈ M (M = Mn, Fe, Co, Ni, and Cu) toward oxygen reduction and CO oxidation by density functional theory

Chen

Chang

et al. 2019

Int J Energy Res

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Summary In the present work, the catalytic activity of metal‐fullerene C58M (M = Mn, Fe, Co, Ni, and Cu) toward oxygen reduction reaction (ORR) and CO oxidation has been explored by detailed density functional theory calculations. Firstly, the binding energy of various ORR species (OOH, O, and OH) on C58M and the corresponding adsorption structures are calculated. The results show that the adsorption strength of any ORR species on C58M follows the order of C58Mn > C58Fe > C58Co > C58Ni > C58Cu and C58Co shows the closest binding energy compared with the Pt(111) surface. Further analysis of the free energy change of ORR indicates that C58Co, C58Ni, and C58Fe have different degrees of catalytic activities, with the calculated free energy change of rate‐determining step of −0.70, −0.32, and −0.04 eV, respectively. On the basis of the above results, the C58Co obviously has the highest ORR activity, with a relatively small overpotential of 0.53 V. In addition, the adsorption free energy of OH can be used as a good descriptor for ORR activity due to the nearly linear relationships between ∆G*OOH, ∆G*O, and ∆G*OH. At last, the catalytic property of C58Co toward CO oxidation reaction is also explored. The calculated results show that CO oxidation on C58Co follows LH mechanism and the rate‐determining step is recognized as *CO + *O2 → *OOCO, with the energy change of −0.13 eV.

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“…Coating UiO‐66 with g‐C 3 N 4 nanosheets enhanced the separation and migration rate of photo‐induced charges, leading to the increase in efficiency of photocatalytic oxidation (PCO) of dye under visible light irradiation . The highly active CuO/CeO 2 oxidation catalyst could be obtained from the calcination of Ce‐UiO‐66 …”

Section: Introductionmentioning

confidence: 99%

Kinetics of photocatalytic degradation of gaseous p‐xylene on UiO‐66‐NH₂ and LaFeO₃ thin films under combined illumination of ultraviolet and visible lights

Thuy¹,

Lộc

Tri³

et al. 2019

Int J of Chemical Kinetics

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The thin film photocatalysts were prepared from solvothermal UiO‐66‐NH2 and sol‐gel perovskite LaFeO3 by a dip‐coating technique. The properties of obtained catalysts were investigated by the methods of Brunauer‐Emmett‐Teller adsorption, XRD, SEM, FT‐IR, TGA, and UV‐vis spectroscopies. The results proved that the thin film of the thickness of 4.2 and 4.7 µm was successfully prepared from micro‐mesoporous UiO‐66‐NH2 and LaFeO3 nanocrystals. Possessing small crystals (9‐35 nm) and the band gap energy of 2.83 and 1.92 eV, respectively, UiO‐66‐NH2 and LaFeO3 are shown to be a highly active visible‐light photocatalyst for photodegradation of p‐xylene‐contained gas. The kinetics of photocatalytic degradation of p‐xylene under combined illumination of ultraviolet and visible lights over obtained UiO‐66‐NH2 and LaFeO3 thin films were carried out in a gradientless flow circulating system at room temperature and atmospheric pressure. The results showed that the Langmuir‐Hinshelwood kinetic model was successfully applied to correlate the obtained data. The kinetics of the reaction on both catalysts were found to be written by the fractional equation, describing the dependence of the reaction rate on the concentration of p‐xylene, oxygen molecules, dissociative adsorbed water vapor, the photon flux, and the inhibition of CO2 product. It implies that the reaction occurred at high surface coverages, molecular p‐xylene, and oxygen participated in the reaction in the form of surface molecular; water—in the forms of •OH and H+. Although there is a general kinetic equation for reaction on various catalysts, the different affinities of the catalysts with the compounds present in the reaction create the kinetic feature of the reaction on each catalyst. Because of the high affinity of catalysts with water vapor, the given reactant increased the rate of p‐xylene photocatalytic degradation at low concentration but inhibited it in the high concentration region. The adsorption affinity of LaFeO3 to oxygen is higher compared to UiO‐66‐NH2; then, there was an optimum concentration of oxygen in the photodegradation of p‐xylene on the former, whereas in the latter monotonically increasing relationship was found.

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Enhanced catalytic performance for CO oxidation and preferential CO oxidation over CuO/CeO2 catalysts synthesized from metal organic framework: Effects of preparation methods

Cited by 173 publications

References 45 publications

Influence of the Hydrothermal Parameters on the Physicochemical Characteristics of Cu−Ce Oxide Nanostructures

Influence of the Hydrothermal Parameters on the Physicochemical Characteristics of Cu−Ce Oxide Nanostructures

Exploring the catalytic activity of metal‐fullerene C ₅₈ M (M = Mn, Fe, Co, Ni, and Cu) toward oxygen reduction and CO oxidation by density functional theory

Kinetics of photocatalytic degradation of gaseous p‐xylene on UiO‐66‐NH₂ and LaFeO₃ thin films under combined illumination of ultraviolet and visible lights

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Enhanced catalytic performance for CO oxidation and preferential CO oxidation over CuO/CeO2 catalysts synthesized from metal organic framework: Effects of preparation methods

Cited by 173 publications

References 45 publications

Influence of the Hydrothermal Parameters on the Physicochemical Characteristics of Cu−Ce Oxide Nanostructures

Influence of the Hydrothermal Parameters on the Physicochemical Characteristics of Cu−Ce Oxide Nanostructures

Exploring the catalytic activity of metal‐fullerene C 58 M (M = Mn, Fe, Co, Ni, and Cu) toward oxygen reduction and CO oxidation by density functional theory

Kinetics of photocatalytic degradation of gaseous p‐xylene on UiO‐66‐NH2 and LaFeO3 thin films under combined illumination of ultraviolet and visible lights

Contact Info

Product

Resources

About

Exploring the catalytic activity of metal‐fullerene C ₅₈ M (M = Mn, Fe, Co, Ni, and Cu) toward oxygen reduction and CO oxidation by density functional theory

Kinetics of photocatalytic degradation of gaseous p‐xylene on UiO‐66‐NH₂ and LaFeO₃ thin films under combined illumination of ultraviolet and visible lights