Preparation of nanometeric gold particles on NaHY

Guillemot, D.; Polisset-Thfoin, M.; Fraissard, J.

doi:10.1007/bf00811481

Cited by 55 publications

(40 citation statements)

References 26 publications

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“…Gold nanoparticles have been prepared inside NaY and HY zeolite supercages by Guillemot et al . by autoreduction of the gold-ethylenediamine complex, [11,21] and Jaeger and Kobu et al . proved it by transmission electron microscopy (TEM) and 129 Xe nuclear magnetic resonance (NMR) studies.…”

Section: Resultsmentioning

confidence: 99%

“…Zeolites are very promising to act as support for stabilizing cations and metallic species because of the crown-ether-like ring structures in their cages and channels. [11] The preparation of monodisperse metal phases with narrow particle size distributions in zeolite matrices also offers the chance to study the chemical properties of metal crystals as a function of their size. [12] A thorough understanding of the unusual catalytic behavior of nanoparticles requires knowledge of their structural and electronic properties, including particles size, area, the surface structure and composition.…”

Section: Introductionmentioning

confidence: 99%

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In situ ESR study of gold supported on NaY zeolite

Roduner

2009

Asia-Pacific J Chem Eng

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Electron spin resonance (ESR) spectroscopy was used to study the anchoring of a Au complex and gold nanoparticles in NaY type zeolites. The complex of Au(II) with two nitrogen atoms of two ethylenediamine ligands [g iso = 2.053, A (Au) = 16.4 G, A (N) = 15.0 G.] in the supercage of the zeolite and conduction electron spin resonance (CESR) of gold particles with 1.56-nm diameter (g = 2.064) were observed. Their formation and stability were related with the gold concentration and the pre-treatment conditions. The small gold particles stabilized in the supercage of zeolite were formed in the samples with low gold concentration after oxygen pre-treatment. The confinement in the zeolite pores obviously prevents the Au(II) complex bound to two nitrogen ligands from undergoing disproportionation.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In situ ESR study of gold supported on NaY zeolite

Roduner

2009

Asia-Pacific J Chem Eng

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“…1) [75,83]. The same precursor has also been used by others to prepare Au/NaHY [126], Au/TiO 2 [35], Au/C [127], and Au/clay mineral [128] catalysts. The Au/SBA-15 and Au/MCM-41 catalysts prepared at pH > 8.0 were found to be very active for low-temperature CO oxidation [75,83].…”

Section: Au/siomentioning

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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“…It was reported that supported Au catalysts are not only active for CO oxidation at very low temperatures but also active for a wide variety of reactions, including hydrogenation of carbon oxides and hydrocarbons, alkene epoxidation, NO reduction, hydrochlorination of ethylene, water-gas shift and the oxidation of volatile organic compounds (VOCs) [4][5][6][7][8][9][10][11][12]. VOCs are major contributor to air pollution because of their toxic and malodorous nature and its contribution to ozone and smog formation.…”

Section: Introductionmentioning

confidence: 99%

Effect of Supports on the Gold Catalyst Activity for Catalytic Combustion of CO and HCHO

Jia

Shen

et al. 2005

Catal Lett

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The deposition-precipitation method was used to prepare gold catalysts based on different supports. Their catalytic activities for combustion of carbon monoxide (CO) and formaldehyde (HCHO) were investigated. All these catalysts showed good activity for the two reactions and the Au/CeO 2 -a catalyst exhibited the highest activity for the two reactions. Furthermore, catalysts derived from the as-precipitate hydroxides exhibited higher activity than that from corresponding oxide supports. The BET, XRD, TEM and XPS were carried out. The results indicated that the gold dispersed more homogeneous on the as-precipitate hydroxide supports than that on the corresponding oxide supports.

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Preparation of nanometeric gold particles on NaHY

Cited by 55 publications

References 26 publications

In situ ESR study of gold supported on NaY zeolite

In situ ESR study of gold supported on NaY zeolite

Development of novel supported gold catalysts: A materials perspective

Effect of Supports on the Gold Catalyst Activity for Catalytic Combustion of CO and HCHO

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