Low-temperature CO oxidation over supported Pt catalysts prepared by colloid-deposition method

Li, Suying; Liu, Gang; Lian, Honglei; Jia, Mingjun; Zhao, Guoming; Jiang, Dazhen; Zhang, Wenxiang

doi:10.1016/j.catcom.2007.10.016

Cited by 75 publications

(59 citation statements)

References 25 publications

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“…Generally, there are two methods to prepare a composite catalyst of such noble metal nanoparticles loaded on a support. One is a two-step method, involving the initial synthesis of noble metal nanoparticles, followed by a subsequent combination of these particles with a suitable support [24,25]. The other method involves calcination of a mixed precursor of noble metal and support materials at relatively high temperature [26,27].…”

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confidence: 99%

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Large scale photochemical synthesis of M@TiO2 nanocomposites (M = Ag, Pd, Au, Pt) and their optical properties, CO oxidation performance, and antibacterial effect

et al. 2010

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Well-dispersed M@TiO 2 (M = Ag, Pd, Au, Pt) nanocomposite particles with a diameter of 200-400 nm can be synthesized on a large scale by a clean photochemical route which does not require any additives using spherical rutile nanoparticles as a support. The sizes of Pt, Au, and Pd nanoparticles formed on the surface of TiO 2 particles are about 1 nm, 5 nm, and 5 nm, respectively, and the diameter of Ag nanoparticles is in the range 2-20 nm. Moreover, the noble metal nanoparticles have good dispersity on the particles of the TiO 2 support, resulting in excellent catalytic activities. Complete conversion in catalytic CO oxidation is reached at temperatures as low as 333 and 363 K, respectively, for Pt@TiO 2 and Pd@TiO 2 catalysts. In addition, the antibacterial effects of the as-synthesized TiO 2 nanoparticles, silver nanoparticles, and Au@TiO 2 and Ag@TiO 2 nanocomposites have been tested against Gram-negative Escherichia coli (E. coli) bacteria. The results demonstrate that the presence of the TiO 2 matrix enhances the antibacterial effect of silver nanoparticles, and the growth of E. coli can be completely inhibited even if the concentration of Ag in Ag@TiO 2 nanocomposite is very low (10 μg/mL).

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“…The other method involves calcination of a mixed precursor of noble metal and support materials at relatively high temperature [26,27]. However, aggregation of nanoparticles is hard to avoid in the first case, while the size of the noble metal particles is difficult to control in the second case [25,28].…”

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Large scale photochemical synthesis of M@TiO2 nanocomposites (M = Ag, Pd, Au, Pt) and their optical properties, CO oxidation performance, and antibacterial effect

et al. 2010

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“…Несмотря на то, что катализатор Au/α-Fe 2 O 3 [8] . Из числа высокоактивных и стабильных катализаторов выделяется катализатор Pt/Fe 2 O 3 [35], который даже в присутствии паров воды в газовой смеси (1,8 об. %) при комнатной температуре обеспечивает 100%-ное окисление СО в течение 3000 часов.…”

Section: состав и активность металлических катализаторов окисления моunclassified

The State and Prospects of Development of Low-Temperature Catalysts for Carbon Monoxide Oxidation of Respiratory Purpose. I Metal Catalysts

Rakitskaya¹,

Kiose²,

Ennan³

et al. 2015

Odesa National University Herald. Chemistry

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“…PVP has two hetero atoms (oxygen, nitrogen) which make the capping of metal particles more efficient leading to size reduction of Pd particles (Telkar et al 2004). Li et al (2008) have found that Pt/Fe 2 O 3 prepared by a colloid-deposition method is relatively more active for CO oxidation under wet conditions. Huang et al (1996) suggested that a complex is formed between Ag ?…”

Section: Introductionmentioning

confidence: 99%

“…Recent progress in nanoscience, particularly in colloidal synthetic methods, has enabled the synthesis of metal nanoparticles with precisely controlled size, shape, and composition (Li et al 2008;Weiliang et al 2013). A suspension of nanosized catalyst is unstable, which is easy to aggregate and precipitate from the catalytic systems resulting in a decrease of catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Catalytic oxidation of carbon monoxide over supported palladium nanoparticles

et al. 2015

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Catalytic oxidation of CO with ozone had been studied over Al 2 O 3 and SiO 2 supported Pd nanoparticles which was synthesized by two different methods. The polyol method mainly resulted in highly dispersed Pd particles on the support, while the impregnation method resulted in agglomeration Pd particles on the support. Supported Pd nanoparticles synthesized from PdCl 2 in the presence of poly (N-vinylpyrrolidone) (PVP) by chemical reduction. The catalysts were characterized by X-ray diffraction, N 2 BET surface area, pore size distributions, CO chemisorption, TEM and H 2 -temperature programmed reduction. The physico-chemical properties were well correlated with activity data. Characterizations of XRD and TEM show that the surface Pd nanoparticles are highly dispersed over Al 2 O 3 and SiO 2 . The catalytic activity was dependent upon ozone/CO ratio, contact times, and the reaction temperature. The extent of carbon monoxide oxidation was proportional to the catalytically ozone decomposition. The PVP synthesized Pd/A 2 O 3 catalyst had been found to be highly active for complete CO removal at room temperature. The higher activity of the nanocatalyst was attributed to small particle size and higher dispersion of Pd over support.

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Low-temperature CO oxidation over supported Pt catalysts prepared by colloid-deposition method

Cited by 75 publications

References 25 publications

Large scale photochemical synthesis of M@TiO2 nanocomposites (M = Ag, Pd, Au, Pt) and their optical properties, CO oxidation performance, and antibacterial effect

Large scale photochemical synthesis of M@TiO2 nanocomposites (M = Ag, Pd, Au, Pt) and their optical properties, CO oxidation performance, and antibacterial effect

The State and Prospects of Development of Low-Temperature Catalysts for Carbon Monoxide Oxidation of Respiratory Purpose. I Metal Catalysts

Catalytic oxidation of carbon monoxide over supported palladium nanoparticles

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