2006
DOI: 10.1016/j.jcat.2006.04.018
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Evaluation of the Au size effect: CO oxidation catalyzed by Au/TiO2

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Cited by 242 publications
(179 citation statements)
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“…Similarly, the optimal Au size for CO oxidation was reported to be 3 nm (158,159). A series of Au/TiO 2 catalysts with different gold sizes was prepared by a sequence of calcination steps and studied in CO oxidation (160). For Au particles with mean particle size, d, in the range of 2-10 nm, the measured TOF at 298 K varied as d 21.7 ¡ 0.2 and d 20.9 ¡ 0.2 for the 7.2 and 4.5 wt% Au/ TiO 2 catalysts, respectively.…”
Section: Co Oxidationmentioning
confidence: 99%
“…Similarly, the optimal Au size for CO oxidation was reported to be 3 nm (158,159). A series of Au/TiO 2 catalysts with different gold sizes was prepared by a sequence of calcination steps and studied in CO oxidation (160). For Au particles with mean particle size, d, in the range of 2-10 nm, the measured TOF at 298 K varied as d 21.7 ¡ 0.2 and d 20.9 ¡ 0.2 for the 7.2 and 4.5 wt% Au/ TiO 2 catalysts, respectively.…”
Section: Co Oxidationmentioning
confidence: 99%
“…For example, Gates and co-workers use X-ray absorption techniques (XANES, EXAFS) and infrared spectroscopy to monitor the oxidation states of Au in CO oxidation and ethylene hydrogenation reactions over Au/MgO [16]. A similar approach has been recently used by Kung and co-workers [17] for studies of the CO oxidation reaction over Au/TiO 2 , by Wang et al [18] on Au/CeO 2 catalysts for water gas-shift reaction, Overbury et al [19] on Au/TiO 2 catalysts of CO oxidation and Wieher et al [20] of different gold catalysts. A recent paper by Hutchings et al [21] reports on complementary studies performed in different groups on the same Au/Fe 2 O 3 catalysts, in particular showing good potentia ls for using Au 197 Mössbauer spectroscopy to elucidate the role of cationic species in reactions.…”
Section: Introductionmentioning
confidence: 99%
“…Gold nanoparticles supported on metal oxides can indeed catalyze low-temperature complete oxidation of hydrocarbons and CO, but also epoxidation reactions and hydrogenations, the NO reduction, and several other reactions as has been reviewed in the recent literature [2,3]. Perhaps the most intensively studied reaction to date is the CO oxidation on gold supported on oxides, such as iron oxide and titania [1,[4][5][6][7], and ceria [8][9][10][11], but also on non-reducible oxides, such as alumina [12][13][14][15] and silica [12]. Activity of nanoparticles of gold on non-oxide supports has also been reported [16].…”
Section: Introductionmentioning
confidence: 99%