CuO nanoparticles supported by ceria for NO x -assisted soot oxidation: insight into catalytic activity and sintering

Andana, Tahrizi; Piumetti, Marco; Bensaid, Samir; Veyre, Laurent; Thieuleux, Chloé; Russo, Nunzio; Fino, Debora; Quadrelli, Elsje Alessandra; Pirone, Raffaele

doi:10.1016/j.apcatb.2017.05.061

Cited by 75 publications

(34 citation statements)

References 65 publications

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“…These results agree with that reported for coppersupported Ceria-zirconia catalysts for soot oxidation in GDI conditions [9]." "Copper content has a key role on the performance of the BaFe1-xCuxO3 catalyst for soot oxidation, which is in agreement with previous reports focused on diesel soot removal [13][14][15][16][17][27][28][29][30] and with that reported for copper-supported Ceria-zirconia catalysts for soot oxidation in GDSI conditions [9]." Answer to Reviewer #2 The authors synthesized composite oxides of Cu, Fe and Ba by a citrate sol-gel method, and investigated the properties and activities of the compounds obtained by their composition ratio.…”

Section: -supporting

confidence: 92%

“…Copper content has a key role on the performance of the BaFe1-xCuxO3 catalyst for soot oxidation, which is in agreement with previous reports focused on diesel soot removal [13][14][15][16][17][27][28][29][30] and with that reported for copper-supported ceria-zirconia catalysts for soot oxidation in GDSI conditions [9]. Thus, the highest soot conversion shown by BFC4 seems to be related not only with the largest amount of -oxygen evolved by this catalyst, but also with the presence of a high amount of surface copper species (as BaOx-CuOx oxide) which catalyze the soot oxidation reaction [9,[27][28][29][30]. In order to complete this study, a deeper analysis of the activity and stability of catalysts, in isothermal reaction conditions, as well as under diesel conditions for comparative purpose, is now under developing.…”

Section: Catalytic Activitysupporting

confidence: 91%

“…These results agree with that reported for BaFe1-xCuxO3 perovskite catalysts for GPF copper-supported ceria-zirconia catalysts for soot oxidation in GDI conditions [9]. The highest soot conversion shown by the highest copper content catalysts (BFC4) seems to be related with their largest amount of -oxygen evolved, as well as with the presence of a high amount of surface copper species (as BaOx-CuOx oxide) which catalyze the soot oxidation reaction [9,[27][28][29][30]. As the performance of BFC4 is hold during a second cycle of oxidation reaction in TPR conditions (cooling down to room temperature in synthetic air after the first TPR cycle, following by addition of an identical amount of surrogated soot to carry out the second cycle), the catalytic role seems to be probed.…”

Section: Catalytic Activitysupporting

confidence: 90%

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BaFe1−xCuxO3 Perovskites as Soot Oxidation Catalysts for Gasoline Particulate Filters (GPF): A Preliminary Study

et al. 2018

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A series of BaFe1-xCuxO3 catalysts (x=0, 0.1, 0.3 and 0.4) have been synthetized, characterized and used for soot oxidation in Gasoline Direct Injection (GDI) exhaust conditions. The characterization of the catalysts (by BET, ICP-OES, XRD, XPS, H2-TPR and O2-TPD) reveals that copper is incorporated into the perovskite lattice leading to: i) the distortion of the original hexagonal perovskite structure for the lowest copper content catalyst (BFC1) and the modification of the structure, from hexagonal to cubic, for the catalysts with higher copper content (BFC3 and BFC4), ii) the generation of a BaOx-CuOx oxide as minority segregated phase for BFC4 catalyst, iii) the increase in the amount of oxygen surface vacancies for BFC3 and BFC4 catalysts, and iv) the decrease in the total amount of O2 released during O2-TPD experiments. All the BaFe1-xCuxO3 perovskites are active for soot oxidation under the highest demanding GDI exhaust conditions (regular stoichiometric GDI operation, i.e., 0% O2). The catalyst with the highest copper content (BFC4) shows the highest soot conversion, related to its largest amount of-oxygen evolved, and, to the presence of a high amount of copper species (as BaOx-CuOx-oxide) on its surface .

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Section: -supporting

confidence: 92%

Section: Catalytic Activitysupporting

confidence: 91%

Section: Catalytic Activitysupporting

confidence: 90%

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BaFe1−xCuxO3 Perovskites as Soot Oxidation Catalysts for Gasoline Particulate Filters (GPF): A Preliminary Study

et al. 2018

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“…There are several synthetic approaches for the preparation of ceria nanoparticles, including precipitation [119][120][121], thermal decomposition [121,122], template or surfactant-assisted method [123][124][125][126], microwave-assisted synthesis [127][128][129], the alcohothermal [124,130] or hydrothermal [121,124,[131][132][133][134][135] method, microemulsion [133,136,137], solution combustion [138,139], sol-gel [140][141][142], sonochemical [143,144], etc. However, not all methods lead to particles of well-ordered size and shape with uniform dispersion on the catalyst surface [145].…”

Section: Shape Effectsmentioning

confidence: 99%

Recent Advances on the Rational Design of Non-Precious Metal Oxide Catalysts Exemplified by CuOx/CeO2 Binary System: Implications of Size, Shape and Electronic Effects on Intrinsic Reactivity and Metal-Support Interactions

Konsolakis

Lykaki

2020

Catalysts

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Catalysis is an indispensable part of our society, massively involved in numerous energy and environmental applications. Although, noble metals (NMs)-based catalysts are routinely employed in catalysis, their limited resources and high cost hinder the widespread practical application. In this regard, the development of NMs-free metal oxides (MOs) with improved catalytic activity, selectivity and durability is currently one of the main research pillars in the area of heterogeneous catalysis. The present review, involving our recent efforts in the field, aims to provide the latest advances—mainly in the last 10 years—on the rational design of MOs, i.e., the general optimization framework followed to fine-tune non-precious metal oxide sites and their surrounding environment by means of appropriate synthetic and promotional/modification routes, exemplified by CuOx/CeO2 binary system. The fine-tuning of size, shape and electronic/chemical state (e.g., through advanced synthetic routes, special pretreatment protocols, alkali promotion, chemical/structural modification by reduced graphene oxide (rGO)) can exert a profound influence not only to the reactivity of metal sites in its own right, but also to metal-support interfacial activity, offering highly active and stable materials for real-life energy and environmental applications. The main implications of size-, shape- and electronic/chemical-adjustment on the catalytic performance of CuOx/CeO2 binary system during some of the most relevant applications in heterogeneous catalysis, such as CO oxidation, N2O decomposition, preferential oxidation of CO (CO-PROX), water gas shift reaction (WGSR), and CO2 hydrogenation to value-added products, are thoroughly discussed. It is clearly revealed that the rational design and tailoring of NMs-free metal oxides can lead to extremely active composites, with comparable or even superior reactivity than that of NMs-based catalysts. The obtained conclusions could provide rationales and design principles towards the development of cost-effective, highly active NMs-free MOs, paving also the way for the decrease of noble metals content in NMs-based catalysts.

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“…Copper oxide (CuO) is a typical p-type semiconductor with narrow band gap, excellent optical and electronic properties, mechanical stability and has been widely applied in fields of photocatalysis (Du et al, 2019), gas sensors (Hou et al, 2018), supercapacitors (Dong et al, 2016) and so on. Hydrothermal method (Andana et al, 2017), thermal oxidation of metallic Cu (Zhang et al, 2016) were used to fabricate CuO, but both of them were consist of high cost, complicated manipulations. Therefore, exploring a facile method to fabricate CuO was essential.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of CuO Nanoflakes at Gas-liquid Interface Via Chemical Bath Deposition with High Photocatalytic Activity

Lin

Sun

2018

The Second International Conference on Materials Chemistry and Environmental Protection

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Fabricating materials at gas-liquid interface is a kind of novel method and has aroused a great attention. Herein, we introduce a new chemical bath deposition method to fabricate CuO nanoflakes directly at the gas-liquid interface of a solution of CuSO4 and NH3•H2O. The structure and morphology are characterized by X-ray diffraction and scanning electron microscopy. The as-prepared CuO nanoflakes exhibited excellent visible light photocatalytic activity in degradation of RhB in the presence of a little amount of H2O2 under tungsten halogen lamp. The method is easily-manipulated, low-cost, environment friendly and promising for the fabrication of micro/nano-structured semiconductor functional materials including the photocatalyst.

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CuO nanoparticles supported by ceria for NO x -assisted soot oxidation: insight into catalytic activity and sintering

Cited by 75 publications

References 65 publications

BaFe1−xCuxO3 Perovskites as Soot Oxidation Catalysts for Gasoline Particulate Filters (GPF): A Preliminary Study

BaFe1−xCuxO3 Perovskites as Soot Oxidation Catalysts for Gasoline Particulate Filters (GPF): A Preliminary Study

Recent Advances on the Rational Design of Non-Precious Metal Oxide Catalysts Exemplified by CuOx/CeO2 Binary System: Implications of Size, Shape and Electronic Effects on Intrinsic Reactivity and Metal-Support Interactions

Fabrication of CuO Nanoflakes at Gas-liquid Interface Via Chemical Bath Deposition with High Photocatalytic Activity

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