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Kónya, Zoltán; Puntes, Víctor; Kiricsi, Imre; Zhu, Julie; Alivisatos, Paul; Somorjai, Gábor A.

doi:10.1023/a:1016505912884

Cited by 78 publications

(53 citation statements)

References 12 publications

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“…About choosing this reaction we have described briefly in the introduction. In previous papers we indicated that differences can be found in the catalytic behavior of catalysts samples loaded by tetrahedral or cubic platinum nanoparticles [5]. We have observed that the catalytic performance of the samples produced by loading the support with platinum nanoparticles is very sensitive to the reaction temperature.…”

Section: Catalytic Features Of Nanoparticlesmentioning

confidence: 88%

Pre-prepared platinum nanoparticles supported on SBA-15 – preparation, pretreatment conditions and catalytic properties

et al. 2007

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The primary objective of this paper is the complete characterization of Pt/SBA-15 catalysts prepared by sonication aided impregnation. During the experiments (i) the influence of sonication applied for introducing the already prepared platinum nanoparticles into the pores of the silica support, (ii) the pressure used for preparing the tablets and/or wafers for catalytic test, (iii) the temperature of heat treatment on the structural changes of catalyst samples, (iv) the effect of platinum particle concentration, and (v) the removal of rest organic matter from the catalysts by different procedures were systematically studied. The samples were characterized by nitrogen adsorption/desorption measurements (BET), TEM, SAXS, XRD and IR. The catalytic activity of the samples was also investigated in the reaction of cyclohexene hydrogenation.

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Section: Catalytic Features Of Nanoparticlesmentioning

confidence: 88%

Pre-prepared platinum nanoparticles supported on SBA-15 – preparation, pretreatment conditions and catalytic properties

et al. 2007

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“…Advances in the synthesis of particles of nanometer dimensions, narrow size distribution, and controlled shape have generated interest because of the potential to create novel materials with tailored physical and chemical properties [131,132]. New properties arise from quantum confinement effects and from the increasing fraction of surface atoms with unique bonding and geometrical configurations.…”

Section: In Situ Characterization Of Co Nanoparticlesmentioning

confidence: 99%

Soft X‐Ray Absorption and Emission Spectroscopy in the Studies of Nanomaterials

Guo¹

2010

X‐Rays in Nanoscience

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“…Mesoporous materials prepared by a self-assembled surfactant aggregate have been widely studied and employed in many fields of material science and engineering due to their remarkable properties such as high surface area, large pore volume, and narrow pore size distribution [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. These materials are potentially important as highly efficient catalyst supports because of the merit of controllable porosity that makes supported catalysts have desirable level of diffusion efficiency.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Mesoporous Ni–alumina Catalyst by One-step Sol–gel Method: Control of Textural Properties and Catalytic Application to the Hydrodechlorination of o-dichlorobenzene

et al. 2005

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Mesoporous Ni-alumina catalysts (Ni-alumina-pre and Ni-alumina-post) were synthesized by one-step sol-gel method using micelle complex comprising lauric acid and nickel ion as a template with metal source and using aluminum sec-butoxide as an aluminum source. The Ni-alumina catalysts showed relatively high surface areas (303 m 2 /g for Ni-alumina-pre and 331 m 2 /g for Ni-alumina-post) and narrow pore size distributions centered at ca. 4 nm. Highly dispersed Ni particles were observed in the Nialumina catalysts (ca. 5.2 nm for Ni-alumina-pre and ca. 6.8 nm for Ni-alumina-post) after reduction at 550°C, while a catalyst prepared without a template (NiAl-comp) exhibited inferior porosity with large metal particles (ca. 12.3 nm). Mesoporous Nialumina catalysts with different porosity were obtained by employing different hydrolysis step of aluminum source. When aluminum source was hydrolyzed under the presence of micelle complex, a supported Ni catalyst with highly developed framework mesoporosity was obtained (Ni-alumina-post). On the other hand, when aluminum source was pre-hydrolyzed followed by mixing with micelle solution, the resulting catalyst (Ni-alumina-pre) retained high portion of textural porosity. It was revealed that the hydrolysis method employed in this research affected not only textural properties but also metal-support interaction in the Nialumina catalysts. It was also found that the Ni-alumina-pre catalyst exhibited weaker interaction between nickel and alumina than the Ni-alumina-post, leading to higher degree of reduction in the Ni-alumina-pre catalyst. In the hydrodechlorination of o-dichlorobenzene, the Ni-alumina catalysts exhibited better catalytic performance than the NiAl-comp catalyst, which was attributed to higher metal dispersion in the Ni-alumina catalysts. In particular, the Ni-alumina-pre catalyst showing 1.5 times higher degree of reduction and larger amounts of o-dichlorobenzene adsorption exhibited better catalytic performance than the Nialumina-post catalyst.

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Untitled

Cited by 78 publications

References 12 publications

Pre-prepared platinum nanoparticles supported on SBA-15 – preparation, pretreatment conditions and catalytic properties

Pre-prepared platinum nanoparticles supported on SBA-15 – preparation, pretreatment conditions and catalytic properties

Soft X‐Ray Absorption and Emission Spectroscopy in the Studies of Nanomaterials

Preparation of Mesoporous Ni–alumina Catalyst by One-step Sol–gel Method: Control of Textural Properties and Catalytic Application to the Hydrodechlorination of o-dichlorobenzene

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