Stabilization of iron by manganese promoters in uniform bimetallic FeMn Fischer–Tropsch model catalysts prepared from colloidal nanoparticles

Dad, Mohammadhassan; Fredriksson, Hans; Loosdrecht, J. van de; Thüne, Peter C.; Niemantsverdriet, J.W.

doi:10.1179/2055075815y.0000000003

Cited by 22 publications

(16 citation statements)

References 37 publications

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“…75,76 Recently, monodisperse Fe and FeMn flat model systems were prepared using the hydrothermal decomposition of Fe and Mn oleate complexes, spin-coated on the TEM silica wafers. 46 It was shown that, after reduction, the manganese promotion affects the size and dispersion of Fe oxides and retards their sintering, to an extent. Elemental mapping of the FeMn catalyst surface after three different treatments is shown in Figure 7.…”

Section: ■ Introductionmentioning

confidence: 99%

Providing Fundamental and Applied Insights into Fischer–Tropsch Catalysis: Sasol–Eindhoven University of Technology Collaboration

Loosdrecht

Ciobîcă²,

Gibson

et al. 2016

ACS Catal.

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Section: ■ Introductionmentioning

confidence: 99%

Providing Fundamental and Applied Insights into Fischer–Tropsch Catalysis: Sasol–Eindhoven University of Technology Collaboration

Loosdrecht

Ciobîcă²,

Gibson

et al. 2016

ACS Catal.

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“…Manganese has been reported to be an electronic promoter that alters the chemisorption species on the catalyst surface and a structural promoter that enhances the dispersion of the active phase during the FTO process [9,42,43]. The necessity for the addition of Mn during the FTO process was reported in our previous work [23][24][25].…”

Section: Effect Of the Catalyst Supportmentioning

confidence: 93%

Effect of the support on cobalt carbide catalysts for sustainable production of olefins from syngas

Wang

Chen

Lin

et al. 2018

Chinese Journal of Catalysis

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Co2C-based catalysts with SiO2, γ-Al2O3, and carbon nanotubes (CNTs) as support materials were prepared and evaluated for the Fischer-Tropsch to olefin (FTO) reaction. The combination of catalytic performance and structure characterization indicates that the cobalt-support interaction has a great influence on the Co2C morphology and catalytic performance. The CNT support facilitates the formation of a CoMn composite oxide during calcination, and Co2C nanoprisms were observed in the spent catalysts, resulting in a product distribution that greatly deviates from the classical Anderson-Schulz-Flory (ASF) distribution, where only 2.4 C% methane was generated. The Co3O4 phase for SiO2-and γ-Al2O3-supported catalysts was observed in the calcined sample. After reduction, CoO, MnO, and low-valence CoMn composite oxide were generated in the γ-Al2O3-supported sample, and both Co2C nanospheres and nanoprisms were identified in the corresponding spent catalyst. However, only separated phases of CoO and MnO were found in the reduced sample supported by SiO2, and Co2C nanospheres were detected in the spent catalyst without the evidence of any Co2C nanoprisms. The Co2C nanospheres led to a relatively high methane selectivity of 5.8 C% and 12.0 C% of the γ-Al2O3-and SiO2-supported catalysts, respectively. These results suggest that a relatively weak cobalt-support interaction is necessary for the formation of the CoMn composite oxide during calcination, which benefits the formation of Co2C nanoprisms with promising catalytic performance for the sustainable production of olefins via syngas.

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“…Iron oxide nanoparticles colloid in toluene were prepared as addressed in refs and . The solution was further diluted by toluene to a desired concentration, then the diluent was deposited dropwise on a SiN membrane of a microheater device fabricated using MEMS technology (microelectronic mechanical systems) and dried at room temperature (RT) prior to loading into the ETEM system (FEI Titan ETEM, operated at 300 kV) .…”

Section: Methodsmentioning

confidence: 99%

Environmental Transmission Electron Microscopy (ETEM) Studies of Single Iron Nanoparticle Carburization in Synthesis Gas

Liu

Zhang²,

Li³

et al. 2017

ACS Catal.

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Structural evolution of iron nanoparticles involving the formation and growth of iron carbide nuclei in the iron nanoparticle was directly visualized at the atomic level, using environmental transmission electron microscopy (TEM) under reactive conditions mimicking Fischer–Tropsch synthesis. Formation of the iron carbide nuclei and surface reconstruction of the iron nanoparticle play an essential role in carburization of the iron nanoparticle and consequent formation of Fe5C2. Identification of carbide and oxide intermediates evidenced by high-resolution TEM images, electron diffraction patterns and electron energy-loss spectra provides a detailed picture from initial activation to final degradation of iron under synthesis gas.

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Stabilization of iron by manganese promoters in uniform bimetallic FeMn Fischer–Tropsch model catalysts prepared from colloidal nanoparticles

Abstract: A systematic study was carried out to investigate the response of monodisperse

Cited by 22 publications

References 37 publications

Providing Fundamental and Applied Insights into Fischer–Tropsch Catalysis: Sasol–Eindhoven University of Technology Collaboration

Providing Fundamental and Applied Insights into Fischer–Tropsch Catalysis: Sasol–Eindhoven University of Technology Collaboration

Effect of the support on cobalt carbide catalysts for sustainable production of olefins from syngas

Environmental Transmission Electron Microscopy (ETEM) Studies of Single Iron Nanoparticle Carburization in Synthesis Gas

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