Catalytic combustion of toluene over cluster-derived gold/iron catalysts

Albonetti, Stefania; Bonelli, Rosa; Delaigle, Romain; Femoni, Cristina; Gaigneaux, Éric M.; Morandi, Vittorio; Ortolani, Luca; Tiozzo, Cristina; Zacchini, Stefano; Trifirò, Ferruccio

doi:10.1016/j.apcata.2009.10.029

Cited by 52 publications

(44 citation statements)

References 28 publications

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“…As expected from literature, addition of gold caused the peaks of Ce (Andreeva et al 2002;Fu et al 2003Fu et al , 2005Lai et al 2006;Carabineiro et al 2010aCarabineiro et al , b, e, g, h,, 2011b and Fe (Ilieva et al 1997;Neri et al 1999;Boccuzzi et al 1999;Minico et al 2000;Hua et al 2004;Khoudiakov et al 2005;Milone et al 2005Milone et al , 2007Solsona et al 2006;Silberova et al 2006;Albonetti et al 2010) oxides to shift to much lower temperatures. The presence of gold also shifted the first two peaks of Fe/alumina to lower temperatures (to *100 and 290°C, respectively) as expected from literature (Ilieva et al 1997;Neri et al 1999;Minico et al 2000;Venugopal et al 2003;Hua et al 2004;Khoudiakov et al 2005;Milone et al 2005Milone et al , 2007Solsona et al 2006;Silberova et al 2006;).…”

Section: Temperature Programmed Reductionsupporting

confidence: 61%

“…According to the literature (Ilieva et al 1997;Neri et al 1999;Boccuzzi et al 1999;Minico et al 2000;Venugopal et al 2003;Hua et al 2004;Khoudiakov et al 2005;PalDey et al 2005;Milone et al 2005Milone et al , 2007Silberova et al 2006;Albonetti et al 2010), the peak at *400°C for Fe doped sample can be attributed to the reduction of hematite (Fe 2 O 3 ) to magnetite (Fe 3 O 4 ), while the peak at *600°C arises from the reduction of Fe 3 O 4 to FeO (wustite) and finally the peak at *850°C is assigned to the reduction to Fe. Three main peaks corresponding to the those reductions were obtained at similar temperatures (Table 2), being the first more intense.…”

Section: Temperature Programmed Reductionmentioning

confidence: 99%

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Gold on oxide-doped alumina supports as catalysts for CO oxidation

2011

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The effect of doping a commercial alumina support with metal oxides of Ce, Co, Cu, Fe, La, Mg, Mn, Ni and Zn was investigated. Doped d-Al 2 O 3 samples were obtained by simple physical mixture (PM) of the alumina with the desired commercial oxide and by traditional impregnation of alumina with precursor salts of the same metals followed by calcination (IC). The metal load (7% wt.) was the same in both cases. Gold (1% wt.) was loaded using a liquid phase reductive deposition method. The obtained materials were characterized by adsorption of N 2 at -196°C, temperature programmed reduction, X-ray diffraction, energy-dispersive X-ray spectrometry and transmission electron microscopy. Both samples prepared by PM and IC showed a mixture of the d-alumina phase with the respective metal oxide, but the BET surface areas of the IC samples were, in general, higher than those of the PM materials. The particle size of the oxide phases were larger for the PM samples than for the IC materials. Nevertheless, catalytic experiments for CO oxidation showed that PM samples were much more active than IC. That could be explained by the size of gold nanoparticles, well known to be related with catalytic activity, that was lower in samples prepared by PM (7-16 nm) than by IC (11-17 nm). Gold was found to be in the metallic state. The most active samples were aluminas containing Zn and Fe prepared by PM that had the smallest gold nanoparticles sizes (7-13 and 8-12 nm, respectively) and had room temperature activities for CO conversion of 0.62 and 1.34 mol CO h -1 g Au -1 , respectively, which are larger than those found in the literature for doped c-alumina samples.

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Section: Temperature Programmed Reductionsupporting

confidence: 61%

Section: Temperature Programmed Reductionmentioning

confidence: 99%

Gold on oxide-doped alumina supports as catalysts for CO oxidation

2011

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“…Moisture is beneficial for the oxidation activity of CeO 2 -supported Au catalysts, which further improves their suitability for automobile emission control [63]. Another study showed that loading of GNPs onto a FeO x /TiO 2 support significantly improved the CO 2 selectivity (with CO 2 as the final oxidation product) in the oxidation of toluene [64]. A similar effect was observed for the oxidation of propene [65].…”

Section: Catalytic Oxidation Of Hydrocarbonssupporting

confidence: 51%

Gold, an alternative to platinum group metals in automobile catalytic converters

et al. 2011

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Catalytic convertors based on the use of platinum, palladium and rhodium play a major role in the cleaning of automobile emissions. Gold, when dispersed as nano-sized particles, has demonstrated significant activity in the conversion of toxic components, including carbon monoxide, unburnt hydrocarbons and nitrogen oxides, in engine emissions and some advantages over the platinum group metals. Some research outcomes on the application of nano-sized gold for the conversion of these components are reviewed. Several key issues in relation to its performance and applicability in catalytic convertors such as low-temperature activity and thermal stability and the possibilities of substituting platinum group metals for automobile emission control with gold are discussed.

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“…Pt 2 Au 4 (C"CtBu) 8 was adsorbed onto silica from hexane solution; after calcination at 300˝C and reduction at 200˝C, this led to~2.5 nm particles of alloy-type according to the TPR and CO-DRIFTS characterization results [96]. [NEt 4 ][AuFe 4 (CO) 16 ] is another precursor, which was impregnated on titania, but after decomposition at 400˝C in N 2 , gold nanoparticles (from 3 to 7 nm for Au loadings from 2 to 7 wt %) were found anchored onto the titania surface through an iron oxide interface [97].…”

Section: Bimetallic Clustersmentioning

confidence: 99%

Chemical Preparation of Supported Bimetallic Catalysts. Gold-Based Bimetallic, a Case Study

Louis

2016

Catalysts

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This review focuses on the chemical methods used to prepare supported bimetallic heterogeneous catalysts, i.e., bimetallic nanoparticles deposited on a support. The review is limited to the preparation of gold-based bimetallic catalysts and moreover to bimetallic nanoparticles supported on powder inorganic supports, i.e., on the surface or in the porosity, and not on model supports such as single crystals.

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Catalytic combustion of toluene over cluster-derived gold/iron catalysts

Cited by 52 publications

References 28 publications

Gold on oxide-doped alumina supports as catalysts for CO oxidation

Gold on oxide-doped alumina supports as catalysts for CO oxidation

Gold, an alternative to platinum group metals in automobile catalytic converters

Chemical Preparation of Supported Bimetallic Catalysts. Gold-Based Bimetallic, a Case Study

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