CO oxidation and COPrOx over preformed Au nanoparticles supported over nanoshaped CeO2

Soler, Lluís; Casanovas, Albert; Urrich, Aitor; Angurell, Inmaculada; Llorca, Jordi

doi:10.1016/j.apcatb.2016.02.025

Cited by 83 publications

(62 citation statements)

References 50 publications

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“…Soler et al . loaded the regularly shaped Au NPs onto the morphologically distinctive CeO 2 substrates, and applied them for CO oxidation and COPrO x .…”

Section: Metal Oxide Substrates Metal/oxide Interfaces and Their Camentioning

confidence: 99%

Surface/Interfacial Catalysis of (Metal)/Oxide System: Structure and Performance Control

2018

ChemCatChem

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Surface/interfacial catalysis on a series of oxide substrates and metal/oxide interfaces has been reviewed. Special attention has been paid to those systems in which the oxide substrates are structurally defined with certain exposed facets, and the metal assembling is well controlled with desired particle size and narrow particle size distribution. The distinct catalytic behaviors over the selected systems have been discussed in line with their specific surface/interfacial structure features as well as other surface properties. The tactics and cations how to build up the novel metal/oxide interfacial structures are provided, and the guideline for extended reaction exploration is also suggested. Success in structure and performance control on these important systems is highly valuable for designing more selective and efficient catalyst in practical applications.

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“…Soler et al . loaded the regularly shaped Au NPs onto the morphologically distinctive CeO 2 substrates, and applied them for CO oxidation and COPrO x .…”

Section: Metal Oxide Substrates Metal/oxide Interfaces and Their Camentioning

confidence: 99%

Surface/Interfacial Catalysis of (Metal)/Oxide System: Structure and Performance Control

2018

ChemCatChem

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“…CO oxidation is a hot topic because of its important application in car‐exhaust emission control. In the current literature, Au nanoparticles (NPs) as active and effective green catalyst are efficient for CO oxidation . The Au/CeO 2 catalyst has been studied widely for CO oxidation because of the reversible conversion between Ce 3+ and Ce 4+ and the strong Au–CeO 2 interaction .…”

Section: Introductionmentioning

confidence: 99%

“…In the current literature, Au nanoparticles (NPs)a sa ctive and effective green catalyst are efficient for CO oxidation. [1][2][3] TheA u/CeO 2 catalyst has been studied widely for CO oxidation because of the reversible conversion between Ce 3 + and Ce 4 + and the strong Au-CeO 2 interaction. [4][5][6] Thes tudy of CO oxidation on Au/CeO 2 has become ap roblem because many factorsc an influence the activity,s ucha st he size andt he valence state of Au, [7][8][9][10] the morphology of CeO 2 ,and the Au-CeO 2 interaction.…”

mentioning

confidence: 99%

Pretreatment Effect on Ceria‐Supported Gold Nanocatalysts for CO Oxidation: Importance of the Gold–Ceria Interaction

et al. 2018

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The encapsulated Au/CeO2 hollow composite shows the effects of different pretreatment conditions on CO oxidation, showing complete conversion temperatures for CO in the order O2 pretreatment (T100=74 °C)>N2 pretreatment (T100=142 °C)>CO pretreatment (T100=167 °C). Because of the good confinement provided by the uniform pores of as‐prepared CeO2, the size of deposited Au nanoparticles embedded in the pores of CeO2 can be well controlled. Pretreated Au/CeO2 catalysts have a good stability with no clear deactivation even after 70 h. A systematic characterization was performed by employing various techniques (XRD, H2 temperature‐programmed reduction, scanning transmission electron microscopy with energy‐dispersive spectroscopy, Raman spectroscopy, X‐ray photoelectron spectroscopy, and in situ diffuse reflectance infrared Fourier transform spectroscopy) to understand the importance of the Au–CeO2 interaction. This revealed that the O2 pretreatment may result in (a) the migration of lattice oxygen atoms to the surface region and clearly increased number of oxygen vacancies in CeO2; (b) the increase of Au−Ox and Au−Ox−Ce bond lengths; (c) the creation of electron holes in the CeO2 substrate and electron deficiencies in Au nanoparticles as well as a strong Au–CeO2 interaction; and (d) increased number of bicarbonates on the surface and Auδ+−CO bonds were produced during CO oxidation. All these features are responsible for an overall enhanced activity of CO oxidation and high durability of the Au/CeO2 hollow composite.

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“…Catalytic CO oxidation has been one of the most effective solutions for CO removal to solve such serious environmental problem [1–8]. It has also received a great deal attention recently by the scientific community in the fields of the pollution control devices for vehicle exhaust purification, indoor air cleaning, and low-temperature CO sensors [6–10]. In many cases, the precious Au dispersed on specific metal oxides with high oxygen storage capacity such as CeO 2 , TiO 2 , and Fe 2 O 3 are highly effective candidates towards the CO oxidation [11–13].…”

Section: Introductionmentioning

confidence: 99%

“…As one of the most important rare earth oxides, CeO 2 has been widely used in three-way catalysts as an efficient catalyst support due to its unique physical and chemical properties [6, 8, 15, 17]. CeO 2 has an excellent oxygen storage and release capacity due to the ability to switch Ce 4+ /Ce 3+ , which makes CeO 2 become an active oxide component of various oxidation catalysts used in diverse redox catalytic reactions [17–32].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and CO Oxidation Activity of 1D Mixed Binary Oxide CeO2-LaO x Supported Gold Catalysts

Zhong

Zhu

et al. 2017

Nanoscale Res Lett

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One-dimensional (1D) Ce-La nanorods with different La contents (Ce and La in the molar ratio of 1:0, 3:1, 1:1, 1:3, and 0:1) were synthesized by hydrothermal process. Au/Ce-La nanorod catalysts were obtained by a modified deposition-precipitation method. The samples were characterized by N2 adsorption-desorption (BET), ICP, X-ray diffraction (XRD), SEM, TEM, EDX, X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (UV-vis DRS), and temperature-programmed reduction (H2-TPR). It revealed that La existed as LaOx in the 1D nanorods. The catalysis results demonstrated that the mixed binary Ce-La nanorod oxides could be a good support for gold catalysts. The contents of La had an important influence on the catalytic performance of Au/Ce-La nanorod catalysts. Among the catalysts, when the Ce/La molar ratio was 3:1, the 1.0%Au/Ce0.75-La0.25 nanorods pretreated at 300 °C showed the best activity among the catalysts for CO oxidation, which could convert CO completely at 30 °C. The catalysts also performed high temperature resistance and good stability for CO oxidation at the reaction temperatures of 40, 70, and 200 °C.

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CO oxidation and COPrOx over preformed Au nanoparticles supported over nanoshaped CeO2

Cited by 83 publications

References 50 publications

Surface/Interfacial Catalysis of (Metal)/Oxide System: Structure and Performance Control

Surface/Interfacial Catalysis of (Metal)/Oxide System: Structure and Performance Control

Pretreatment Effect on Ceria‐Supported Gold Nanocatalysts for CO Oxidation: Importance of the Gold–Ceria Interaction

Synthesis and CO Oxidation Activity of 1D Mixed Binary Oxide CeO2-LaO x Supported Gold Catalysts

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