Noble metal catalysts supported on nanofibrous polymeric membranes for environmental applications

Soukup, Karel; Topka, Pavel; Hejtmánek, Vladimı́r; Petras, David; Valeš, Václav; Šolcová, Olga

doi:10.1016/j.cattod.2014.03.040

Cited by 17 publications

(10 citation statements)

References 18 publications

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“…This may be beneficial for oxidation catalysis. We reported earlier that the noble metal particle size may influence the catalytic performance in the oxidation of VOCs . In the case of Pd, the higher catalytic activity of larger Pd particles in oxidation reactions can be ascribed to the easier cleavage of an O–O bond in oxygen molecules adsorbed on larger Pd particles .…”

Section: Resultsmentioning

confidence: 99%

Activated Carbon from Renewable Material as an Efficient Support for Palladium Oxidation Catalysts

et al. 2019

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Activated carbon prepared from cocoa pod husk, which is an abundant agricultural waste, was employed as a green support for palladium oxidation catalysts. Systematic characterization of the support and palladium catalysts by atomic emission spectroscopy, N2 and CO2 physisorption measurements, X‐ray powder diffraction, infrared spectroscopy, electron microscopy, temperature‐programmed reduction by hydrogen, and temperature‐programmed desorption of NH3 and CO2 allowed detailed monitoring of their characteristics. Subsequently, the catalytic performance and selectivity in the oxidation of ethanol as a model volatile organic compound (VOC) was studied and linked to physicochemical properties of the catalysts.

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Section: Resultsmentioning

confidence: 99%

Activated Carbon from Renewable Material as an Efficient Support for Palladium Oxidation Catalysts

et al. 2019

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“…It was demonstrated earlier that the catalytic performance in alcohol oxidation can be influenced by noble metal loading and/or particle size [33][34][35]. Minicò et al [36] concluded that the high activity of Au/Fe 2 O 3 catalyst in ethanol oxidation was related to the capacity of highly dispersed gold to weaken the Fe-O bond thus increasing the mobility of the lattice oxygen which is involved in ethanol oxidation probably through a Mars-van Krevelen reaction mechanism.…”

Section: Discussionmentioning

confidence: 99%

Total oxidation of ethanol over Au/Ce0.5Zr0.5O2 cordierite monolithic catalysts

Topka

Klementová

2016

Applied Catalysis A: General

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“…Hydrogenation of phenol to cyclohexanone was used as a model for this catalyst. The reaction is very important in the industry to produce cyclohexanone, which is a raw material for nylon industries [28,29]. It is very difficult to obtain excellent cyclohexanone selectivity at high phenol conversion since the desired product (cyclohexanone) is very active and can be easily hydrogenated to undesired product (cyclohexanol) as shown in Equation (1).…”

Section: Introductionmentioning

confidence: 99%

Polarized Catalytic Polymer Nanofibers

2019

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Molecular scale modifications were achieved by spontaneous polarization which is favored in enhancements of β-crystallization phase inside polyvinylidene fluoride (PVDF) nanofibers (NFs). These improvements were much more effective in nano and submicron fibers compared to fibers with relatively larger diameters. Metallic nanoparticles (NPs) supported by nanofibrous membranes opened new vistas in filtration, catalysis, and serving as most reliable resources in numerous other industrial applications. In this research, hydrogenation of phenol was studied as a model to test the effectiveness of polarized PVDF nanofiber support embedded with agglomerated palladium (Pd) metallic nanoparticle diameters ranging from 5–50 nm supported on polymeric PVDF NFs with ~200 nm in cross-sectional diameters. Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Atomic Force Microscopy (AFM), Energy Dispersive X-Ray Spectroscopy (EDX), Fourier Transform Infrared Spectroscopy (FTIR) and other analytical analysis revealed both molecular and surface morphological changes associated with polarization treatment. The results showed that the fibers mats heated to their curie temperature (150 °C) increased the catalytic activity and decreased the selectivity by yielding substantial amounts of undesired product (cyclohexanol) alongside with the desired product (cyclohexanone). Over 95% phenol conversion with excellent cyclohexanone selectivity was obtained less than nine hours of reaction using the polarized PVDF nanofibers as catalytic support structures.

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Noble metal catalysts supported on nanofibrous polymeric membranes for environmental applications

Cited by 17 publications

References 18 publications

Activated Carbon from Renewable Material as an Efficient Support for Palladium Oxidation Catalysts

Activated Carbon from Renewable Material as an Efficient Support for Palladium Oxidation Catalysts

Total oxidation of ethanol over Au/Ce0.5Zr0.5O2 cordierite monolithic catalysts

Polarized Catalytic Polymer Nanofibers

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