A novel fumed silica-supported nitrogenous platinum complex as a highly efficient catalyst for the hydrosilylation of olefins with triethoxysilane

Li, Ji; Yang, Chunhui; Zhang, Lei; Ma, Tianlong

doi:10.1016/j.jorganchem.2011.02.021

Cited by 37 publications

(14 citation statements)

References 18 publications

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“…36 In the SiO 2 -NH 2 spectrum, new peaks appear at 2925 cm À1 and 1415 cm À1 corresponding to -CH 2stretching and bending vibrations of the pendant propyl chain and the band at 1564 cm À1 is from -NH 2vibrations. 14 Fig. 3(A-C), where the dark spots on the surface of the catalysts could be Pt and the morphology and distribution of Pt could be observed.…”

Section: Resultsmentioning

confidence: 96%

Preparation of polycarboxylic acid-functionalized silica supported Pt catalysts and their applications in alkene hydrosilylation

Shao

2018

RSC Adv.

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Section: Resultsmentioning

confidence: 96%

Preparation of polycarboxylic acid-functionalized silica supported Pt catalysts and their applications in alkene hydrosilylation

Shao

2018

RSC Adv.

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“…Those Pt-NS coordination complexes were stable at high temperature and contributed to better dispersion [25] and enhanced catalytic activity [26] of Pt. Hence, the thermal degradation was further suppressed.…”

Section: Resultsmentioning

confidence: 99%

“…The failure of Pt affecting thermal stability under air atmosphere might be due to the oxidation of Pt. However, with the existence of NS, Pt seemed to preserve its influence, which might be due to the coordination of Pt and NS [26].…”

Section: Sample Codesmentioning

confidence: 99%

Synergistic effect and mechanism of platinum catalyst and nitrogen-containing silane on the thermal stability of silicone rubber

et al. 2016

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Platinum (Pt) catalyst and nitrogen-containing silane (NS) were introduced to improve the thermal stability of silicone rubber. The effects of Pt and NS on thermal stability and degradation mechanism of silicone rubber were investigated by thermogravimetry (TG), thermogravimetry-Fourier transform infrared spectrometry (TG-FTIR), scanning electron microscope-energy dispersive X-ray spectroscopy (SEM-EDXS) and Fourier transform infrared spectrometry (FTIR). A significant synergism was found between Pt and NS for improving the thermal stability of silicone rubber. When 6.67 ppm of Pt and 1.4 phr of NS were introduced, the temperature of 10% and 20% weight loss under nitrogen atmosphere were respectively increased by 36 oC and 119 oC. Meanwhile, the residue weight at 900 oC was doubled to 68% in the presence of Pt/NS. The synergistic mechanism might be that the nitrogen atom coordinated with Pt and improved the catalytic efficiency of Pt. Additionally, NS preserved the catalytic activity of Pt under air atmosphere. Hence, Pt/NS efficiently catalyzed thermal crosslinking and suppressed degradation of silicone chains. Moreover, it revealed that the presence of Pt/NS protected silicone chains from oxidation. Thus, the unzipping depolymerization by silanol groups was reduced significantly.

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“…29 In order to modify the surfaces of SiO 2 hard templates with amino groups, 10.0 mL of SiO 2 nanospheres-dispersed ethanol and 5.0 mL of 1.0 M (3-aminopropyl)triethoxysilane (l, 98%)-dissolved ethanol were mixed and kept under stirring for 2 h. Then, the reaction mixture was added with 5.0 mL of platinum seeds-dispersed ethanol and stirred for 1 h to attach platinum seeds on SiO 2 nanospheres. For the transformation of platinum seeds into platinum shells, 4.0 mL of 2 days-aged 10 mM H 2 PtCl 6 (aq) and 2.0 mL of the above mixture were mixed, stirred for 1 h, added with 0.32 mL of 100 mM L-ascorbic acid(aq), and stirred for 1 h. 30 Finally, 10.0 mL of HF(aq) and 1.0 mL of the above colloid were mixed and stirred for 2 min. 31 The produced hollow platinum nanospheres were centrifuged at 10,000 rpm for 10 min and redispersed in 1.0 mL of ethanol three times.…”

Section: Methodsmentioning

confidence: 99%

Observation and Characterization of the Surface Plasmon Resonances of Platinum Nanoshells

Lee¹,

Kwak

Jang³

2014

Bulletin of the Korean Chemical Society

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The controlled fabrication, characterization, and application of nanometer-sized materials with functional properties have been studied widely.1-3 Metal nanostructures attract considerable attention scientifically as well as industrially owing to their intriguing chemico-physical properties that can be tailored as functions of nanoparticle sizes, shapes, and mutual interactions.4,5 In particular, noble-metal nanostructures have attracted enormous attention in various fields of study because of their novel properties, including large optical-field enhancements resulting in the strong scattering and absorption of light. They have possible uses in diverse applications such as devices, transistors, optoelectronics, information storages, and energy converters.1,6 Among various noble-metal nanostructures, platinum-based nanostructures especially have attracted widespread interest as platinum plays an outstanding role in multifunctional catalysts for many industrial reactions. However, because there are some crucial obstacles such as low platinum-utilization efficiency and high cost, some ways must be found to reduce the amount of platinum used in a specific application by increasing its catalytic activity in order to lower the overall cost.

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A novel fumed silica-supported nitrogenous platinum complex as a highly efficient catalyst for the hydrosilylation of olefins with triethoxysilane

Cited by 37 publications

References 18 publications

Preparation of polycarboxylic acid-functionalized silica supported Pt catalysts and their applications in alkene hydrosilylation

Preparation of polycarboxylic acid-functionalized silica supported Pt catalysts and their applications in alkene hydrosilylation

Synergistic effect and mechanism of platinum catalyst and nitrogen-containing silane on the thermal stability of silicone rubber

Observation and Characterization of the Surface Plasmon Resonances of Platinum Nanoshells

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