Cu-Ce-O catalyst revisited for exceptional activity at low temperature CO oxidation reaction

Zedan, Abdallah F.; Polychronopoulou, Kyriaki; Asif, Ayesha; AlQaradawi, Siham Y.; Aljaber, Amina S.

doi:10.1016/j.surfcoat.2018.09.035

Cited by 34 publications

(16 citation statements)

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“…The Raman spectrum of CeCuO x (Figure d) displays F 2g band of CeO 2 at 449 cm −1 and A g and B g 1 bands of CuO at 280 and 316 cm −1 . A redshift of 15 cm −1 for F 2g band of CeO 2 and a blueshift of 10 cm −1 for A g band of CuO observed in the spectrum of CeCuO x are further evidence of copper substitution and possible formation of Ce 3+ (or Cu + ) . The broadening of F 2g band of CeO 2 is attributed to the oxygen vacancies .…”

Section: Methodsmentioning

confidence: 73%

A Novel Approach to High‐Performance Aliovalent‐Substituted Catalysts—2D Bimetallic MOF‐Derived CeCuO_x Microsheets

Wang

Bañares

et al. 2019

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interest in mixed transition metal oxides (MTMOs). Our recent study [6] and those of others [7,8] have shown that surface defects of catalysts, particularly surface oxygen vacancies, play an important role in catalytic performance. Aliovalent substitution is considered to promote the creation of defects and vacancies, thus enhancing the catalytic reaction. [9,10] Conventional preparation methods using wet impregnation, [11,12] combustion, [13] and co-precipitation [14] are unable to produce uniform substitution beyond 10 at.%. [15] Higher loading often triggers the formation of separate oxide phases. Moreover, hightemperature post-treatment often results in sintering and loss of surface area for MTMOs prepared by these methods.Metal-organic frameworks (MOFs) were first used as catalyst precursor in making electrocatalysts. [16][17][18] More recently, ZIF-67 was used to prepare CeO 2 -doped Co 3 O 4 to catalyze the reaction of NO and CO. [19] Zamaro et al. [20] pyrolyzed the wet-impregnated Ce(III) on HKUST-1 to obtain CuO/ CeO 2 catalyst for CO oxidation. Similarly, Li and co-workers [21] calcined Cu 2+ supported on Ce-based UiO-66 to obtain CuO/ CeO 2 active for CO oxidation at around 100 °C. The degree of heterometal substitution into metal oxide lattices is limited for these examples. This work proposes a novel synthesis approach Mixed transition metal oxides (MTMOs) have enormous potential applications in energy and environment. Their use as catalysts for the treatment of environmental pollution requires further enhancement in activity and stability. This work presents a new synthesis approach that is both convenient and effective in preparing binary metal oxide catalysts (CeCuO x ) with excellent activity by achieving molecular-level mixing to promote aliovalent substitution. It also allows a single, pure MTMO to be prepared for enhanced stability under reaction by using a bimetallic metal-organic framework (MOF) as the catalyst precursor. This approach also enables the direct manipulation of the shape and form of the MTMO catalyst by controlling the crystallization and growth of the MOF precursor. A 2D CeCuO x catalyst is investigated for the oxidation reactions of methanol, acetone, toluene, and o-xylene. The catalyst can catalyze the complete reactions of these molecules into CO 2 at temperatures below 200 °C, representing a significant improvement in performance. Furthermore, the catalyst can tolerate high moisture content without deactivation.Transition metal oxides are used in many technological products in the energy and environmental fields including catalysts, [1,2] sensors, [3,4] and electrodes. [5] Being less expensive than noble metals, transition metal oxides are attractive as environmental catalysts, but reactivity and selectivity remain major hurdles. Studies show that doping and lattice substitution can enhance the catalytic activities, thus explains the growing Small 2019, 15, 1903525 1903525 (2 of 7) www.advancedsciencenews.com

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Section: Methodsmentioning

confidence: 73%

A Novel Approach to High‐Performance Aliovalent‐Substituted Catalysts—2D Bimetallic MOF‐Derived CeCuO_x Microsheets

Wang

Bañares

et al. 2019

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“…CuO-based catalysts present remarkable catalytic performance and selectivity for CO 2 concerning the VOC oxidation reaction [17][18][19]. The feasibility of the partial substitution or total replacement of Mg 2+ by Cu 2+ is already described in the literature [20][21][22].…”

Section: Of 14mentioning

confidence: 96%

“…These results confirm the advantages of the synthesisby-hydrotalcite route in order to obtain homogeneous catalytic materials. It should be noted that Zedan et al [18] synthesized Cu-Ce-O catalysts using the combustion method but the SEM-EDX results showed that these materials had a certain heterogeneity. The aim of using hydrotalcite-like precursors is to obtain a very good dispersion of the resulting metal oxides.…”

Section: Textural Propertiesmentioning

confidence: 99%

“…Two photopeaks are distinct in the O 1s region at 530 (O-I) and 532 eV (O-II). O-II can be related to the oxygen of the surface hydroxyl or carbonate species [18,40,41], while O-I is related to the lattice oxygen of the metal oxide [19,[40][41][42]. The binding energy and relative percentage of each photopeak are presented in Table 3.…”

Section: X-ray Photoelectron Spectroscopymentioning

confidence: 99%

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CuAlCe Oxides Issued from Layered Double Hydroxide Precursors for Ethanol and Toluene Total Oxidation

et al. 2020

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CuAlCe oxides were obtained from hydrotalcite-type precursors by coprecipitation using a M2+/M3+ ratio of 3. The collapse of the layered double hydroxide structure following the thermal treatment leads to the formation of mixed oxides (CuO and CeO2). The catalytic performance of the copper-based catalysts was evaluated in the total oxidation of two Volatile Organic Compounds (VOCs): ethanol and toluene. XRD, SEM Energy-Dispersive X-ray Spectrometry (EDX), H2-temperature programmed reduction (TPR) and XPS were used to characterize the physicochemical properties of the catalysts. A beneficial effect of combining cerium with CuAl-O oxides in terms of redox properties and the abatement of the mentioned VOCs was demonstrated. The sample with the highest content of Ce showed the best catalytic properties, which were mainly related to the improvement of the reducibility of the copper species and their good dispersion on the surface. The presence of a synergetic effect between the copper and cerium elements was also highlighted.

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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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Cu-Ce-O catalyst revisited for exceptional activity at low temperature CO oxidation reaction

Cited by 34 publications

References 43 publications

A Novel Approach to High‐Performance Aliovalent‐Substituted Catalysts—2D Bimetallic MOF‐Derived CeCuO_x Microsheets

A Novel Approach to High‐Performance Aliovalent‐Substituted Catalysts—2D Bimetallic MOF‐Derived CeCuO_x Microsheets

CuAlCe Oxides Issued from Layered Double Hydroxide Precursors for Ethanol and Toluene Total Oxidation

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

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Cu-Ce-O catalyst revisited for exceptional activity at low temperature CO oxidation reaction

Cited by 34 publications

References 43 publications

A Novel Approach to High‐Performance Aliovalent‐Substituted Catalysts—2D Bimetallic MOF‐Derived CeCuOx Microsheets

A Novel Approach to High‐Performance Aliovalent‐Substituted Catalysts—2D Bimetallic MOF‐Derived CeCuOx Microsheets

CuAlCe Oxides Issued from Layered Double Hydroxide Precursors for Ethanol and Toluene Total Oxidation

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

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A Novel Approach to High‐Performance Aliovalent‐Substituted Catalysts—2D Bimetallic MOF‐Derived CeCuO_x Microsheets

A Novel Approach to High‐Performance Aliovalent‐Substituted Catalysts—2D Bimetallic MOF‐Derived CeCuO_x Microsheets

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