Platinum and ruthenium catalysts on mesoporous titanium and zirconium oxides for the catalytic wet air oxidation of model compounds

Perkas, Nina; Minh, Doan Pham; Gallezot, P.; Gedanken, Aharon; Бессон, М.

doi:10.1016/j.apcatb.2005.01.009

Cited by 63 publications

(56 citation statements)

References 29 publications

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“…We have inserted Ru nanoparticles into mesoporous TiO 2 -TiO 2 (MSP) by a one-step ultrasound-assisted polyol reduction method. The catalyst was first briefly characterized, and tested in catalytic wet oxidation of organic acids [13]. Here we report the properties of Ru/ TiO 2 (MSP) with different loadings characterized by a series of physicochemical methods, and investigated for its catalytic activity in the POM reaction.…”

Section: Introductionmentioning

confidence: 99%

Sonochemically Prepared high Dispersed Ru/TiO2 Mesoporous Catalyst for Partial Oxidation of Methane to Syngas

et al. 2005

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Highly dispersed Ru nanoparticles on mesoporous TiO 2 have been synthesized by a one-step ultrasound assisted polyol reduction procedure. The catalysts have been characterized by XRD, TEM and HR-TEM, EDX, BET and TPR methods. It has been demonstrated that the sonochemical method reduces the Ru +3 ions creating a narrow size distribution of metallic nanoparticles deposited on the mesoporous support without damaging its pore structure. The nanoparticles of Ru are highly dispersed and stable because of their incorporation into the mesopores, and the strong metal-support interaction. The catalytic properties of Ru/TiO 2 (MSP) have been tested in the partial oxidation of methane, and high activity and selectivity towards CO and H 2 have been demonstrated.

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Section: Introductionmentioning

confidence: 99%

Sonochemically Prepared high Dispersed Ru/TiO2 Mesoporous Catalyst for Partial Oxidation of Methane to Syngas

et al. 2005

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“…It is a low-cost material than that of Pd and Pt. Ruthenium nanoparticles were used in many applications such as catalytic dehydrogenation [3], methanol fuel cells [4], synthesis of diesel fuels [5], azo dye degradation [6], removal of organic pollutants from water [7] and so on. Synthesis of Ru NPs is usually carried out by various physical and chemical methods such as microwave irradiation [6,8], sonochemical method [9], hydrothermal method [10] and electrochemical method [11].…”

Section: Introductionmentioning

confidence: 99%

Antibacterial activity of ruthenium nanoparticles synthesized using Gloriosa superba L. leaf extract

et al. 2014

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This work reports an ecofriendly approach for the synthesis of Ruthenium nanoparticles (Ru NPs) using aqueous leaf extract of Gloriosa superba. G. superba contains cholidonic, superbine, colchicine, gloriosol, phytosterils and stigmasterin, which are found to be responsible for the bio-reduction of Ru NPs. The synthesized Ru NPs were characterized using UV-Vis spectroscopy, Fluorescence spectra, FTIR, XRD, SEM and EDX analyses. UV-Vis spectra of the aqueous medium containing Ru NPs showed a gradual decrease of the absorbance peak observed at 494 nm. Fluorescence spectra of Ru NPs emission (k em ) exhibited at 464 nm are attributed to the Ru=N p bonds transition. The biomolecules responsible for the reduction of Ru NPs were analyzed by FTIR. XRD results confirmed the presence of Ru NPs with hexagonal crystal structure. The calculated crystallite sizes using Scherrer formula are in the range from 25 to 90 nm. Scanning electron microscopy ascertained spherical nature of the Ru NPs. The EDX analysis showed the complete elemental composition of the synthesized Ru NPs. The synthesized Ru NPs exhibited good antibacterial performance against gram-positive and gram-negative bacterial strains, which was studied using standard disc diffusion method. The synthesis of Ru NPs by this method is rapid, facile and can be used for various applications.

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“…It should also be emphasized that the physical parameters (surface area, pore volume, and pore size) of TiO 2 / nano-metal composites when the metal is platinum or gold, are supposed to be stable under various reaction conditions due to a relatively low sensitivity of platinum and gold to bulk oxidation. [20] A typical high-resolution scanning electron microscopy (HRSEM) image of the modified carbon paper impregnated with TiO 2 /nano-Pt composites (see Experimental section) is shown in Figure 1, which demonstrates a snowflake-like morphology with quite uniform distribution of the composites on the carbon paper. The inset in this figure exhibits several nanometer-sized TiO 2 /nano-Pt composites spread on a single fiber of the carbon paper.…”

Section: Resultsmentioning

confidence: 99%

“…CPEs were modified with composites containing ruthenium, platinum, or gold nanometersized particles (an average size around 2.5 nm) inserted in/deposited on the mesoporous TiO 2 anatase particles (around 200 nm in diameter). These composites were synthesized sonochemically as described elsewhere [20,25]. The insertion/deposition of metal nanoparticles (Ru, Pt, and Au) into/on TiO 2 was carried out by ultrasonic irradiation.…”

Section: Methodsmentioning

confidence: 99%

Carbon Electrodes Modified with TiO₂/Metal Nanoparticles and Their Application for the Detection of Trinitrotoluene

Filanovsky¹,

Markovsky

Bourenko³

et al. 2007

Adv Funct Materials

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The preparation of modified, catalytically active, functional carbon electrodes and their application to the electrochemical reduction of trinitrotoluene (TNT) is reported. Modification of the electrodes is performed with composites of nanometer‐sized, mesoporous titanium dioxide, which acts as a support containing inserted/deposited nanoparticles of ruthenium, platinum, or gold. These composites are prepared by a novel sonochemical synthesis using simple and low‐cost precursors. Cyclic voltammetry shows that 2,4,6‐trinitrotoluene can be reduced on thus‐modified carbon‐paper electrodes at potentials of around –0.5 V (vs. Ag/AgCl/Cl–) in aqueous solutions. Unexpectedly, carbon‐paper electrodes modified with the TiO2/nano‐Pt composites demonstrate a remarkable electrochemical activity toward the reduction of trinitrotoluene. A significant finding is that the two electrode processes—the reduction of TNT and of oxygen—are quite well separated in potential on the modified carbon‐paper electrodes because of selective electrochemical activity of the TiO2/nano‐Pt and TiO2/nano‐Au composites. TiO2/nano‐Ru composites are found to be much less electrochemically active for the detection of TNT compared to the previous two. It was also established that the titanium dioxide support of TiO2/nano‐Pt composites plays a specific role for facilitating the TNT‐ and oxygen‐reduction processes.

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Platinum and ruthenium catalysts on mesoporous titanium and zirconium oxides for the catalytic wet air oxidation of model compounds

Cited by 63 publications

References 29 publications

Sonochemically Prepared high Dispersed Ru/TiO2 Mesoporous Catalyst for Partial Oxidation of Methane to Syngas

Sonochemically Prepared high Dispersed Ru/TiO2 Mesoporous Catalyst for Partial Oxidation of Methane to Syngas

Antibacterial activity of ruthenium nanoparticles synthesized using Gloriosa superba L. leaf extract

Carbon Electrodes Modified with TiO₂/Metal Nanoparticles and Their Application for the Detection of Trinitrotoluene

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Platinum and ruthenium catalysts on mesoporous titanium and zirconium oxides for the catalytic wet air oxidation of model compounds

Cited by 63 publications

References 29 publications

Sonochemically Prepared high Dispersed Ru/TiO2 Mesoporous Catalyst for Partial Oxidation of Methane to Syngas

Sonochemically Prepared high Dispersed Ru/TiO2 Mesoporous Catalyst for Partial Oxidation of Methane to Syngas

Antibacterial activity of ruthenium nanoparticles synthesized using Gloriosa superba L. leaf extract

Carbon Electrodes Modified with TiO2/Metal Nanoparticles and Their Application for the Detection of Trinitrotoluene

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Carbon Electrodes Modified with TiO₂/Metal Nanoparticles and Their Application for the Detection of Trinitrotoluene