Homogeneously Dispersed Ceria Nanocatalyst Stabilized with Ordered Mesoporous Alumina

Yuan, Quan; Duan, Haohong; Li, Lele; Li, Zhenxing; Duan, Wentao; Zhang, Le-Sheng; Song, Weiguo; Yan, Chun‐Hua

doi:10.1002/adma.200904223

Cited by 108 publications

(52 citation statements)

References 36 publications

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“…Thus, their application is limited where high reaction temperatures are required to prevent catalyst sintering, one feasible solution is to use mesoporous materials [6][7][8][9] and hollow cages [10,11] to provide confined microenvironments for supporting the catalyst. Another is to prepare composite supports by intergrating the advantages of different materials, thus improving the thermal stability and activity of the gold catalyst [12][13][14][15][16]. Examples are CeO 2 -doped mesoporous Al 2 O 3 [12] and FeO x -modified hydroxyapatite [16].…”

Section: Introductionmentioning

confidence: 99%

Gold nanoparticles stabilized by a flake-like Al2O3 support

Sun

et al. 2011

Gold Bull

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Section: Introductionmentioning

confidence: 99%

Gold nanoparticles stabilized by a flake-like Al2O3 support

Sun

et al. 2011

Gold Bull

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“…Gold catalysts based on oxidemodified Al 2 O 3 supports include Au/MgO/Al 2 O 3 [189][190][191], Au/MnO x /Al 2 O 3 [192][193][194], Au/FeO x /Al 2 O 3 [192][193][194][195][196], Au/CoO x /Al 2 O 3 [192,194], Au/ZnO/Al 2 O 3 [192,197] [199], and Au/CeO 2 /Al 2 O 3 [200][201][202][203]. In particular, Nieuwenhuys and coworkers tested the performance of Al 2 O 3 -based gold catalysts in a number of reactions, and established that MgO/Al 2 O 3 [189], BaO/Al 2 O 3 [204,205], ZnO/Al 2 O 3 [197], and ZrO x /Al 2 O 3 [197] could all stabilize gold nanoparticles against thermal sintering.…”

Section: Pre-modification Of Al 2 O 3 Supportsmentioning

confidence: 99%

Development of novel supported gold catalysts: A materials perspective

2010

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Since Haruta et al. discovered that small gold nanoparticles finely dispersed on certain metal oxide supports can exhibit surprisingly high activity in CO oxidation below room temperature, heterogeneous catalysis by supported gold nanoparticles has attracted tremendous attention. The majority of publications deal with the preparation and characterization of conventional gold catalysts (e.g., Au/TiO 2 ), the use of gold catalysts in various catalytic reactions, as well as elucidation of the nature of the active sites and reaction mechanisms. In this overview, we highlight the development of novel supported gold catalysts from a materials perspective. Examples, mostly from those reported by our group, are given concerning the development of simple gold catalysts with single metal-support interfaces and heterostructured gold catalysts with complicated interfacial structures. Catalysts in the first category include active Au/SiO 2 and Au/metal phosphate catalysts, and those in the second category include catalysts prepared by pre-modification of supports before loading gold, by post-modification of supported gold catalysts, or by simultaneous dispersion of gold and an inorganic component onto a support. CO oxidation has generally been employed as a probe reaction to screen the activities of these catalysts. These novel gold catalysts not only provide possibilities for applied catalysis, but also furnish grounds for fundamental research.

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“…Later, this method was further extended to synthesize mesoporous alumina-supported metal oxides (NiO, Cr 2 O 3 , CeO 2 , etc.) [20][21][22][23], and the high-quality mesoporous structure with strong metalsupport interactions and homogeneous distribution of active component was observed [24,25].…”

Section: Introductionmentioning

confidence: 93%

Effect of reduction–oxidation treatment on structure and catalytic properties of ordered mesoporous Cu–Mg–Al composite oxides

Zhang

Jiao

et al. 2015

Science Bulletin

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Ordered mesoporous Cu-Mg-Al composite oxides were synthesized via the one-pot evaporation-induced self-assembly strategy. Using this method, copper was first homogeneously incorporated into the ordered mesoporous spinel matrix. After H 2 reduction treatment, according to X-ray diffraction (XRD) and transmission electron microscopy (TEM) results, copper existed as metallic nanoparticles with the size of 6-10 nm that well decorated the parent mesoporous skeleton. The metallic nanoparticles were then re-oxidized to copper oxide when exposed to air or during CO oxidation reaction at low temperatures. Thus, copper migrated from bulk spinel phase to the surface after the reduction-oxidation treatment. Moreover, the copper on the surface was re-incorporated into the bulk spinel phase by further thermal treatment at much higher temperature in the presence of air. The correlation between the state of copper in the mesoporous composite oxides and the catalytic performance toward CO oxidation was studied. It was found that copper existed as oxide nanoparticles on the surface of mesoporous Mg-Al skeleton is much more active than that existed as lattice Cu ions in spinel phase.

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Homogeneously Dispersed Ceria Nanocatalyst Stabilized with Ordered Mesoporous Alumina

Cited by 108 publications

References 36 publications

Gold nanoparticles stabilized by a flake-like Al2O3 support

Gold nanoparticles stabilized by a flake-like Al2O3 support

Development of novel supported gold catalysts: A materials perspective

Effect of reduction–oxidation treatment on structure and catalytic properties of ordered mesoporous Cu–Mg–Al composite oxides

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