Wasseraufreinigung und Mikroplastik‐Entferung durch magnetische Polyoxometallat‐unterstützte ionische Flüssigphasen (magPOM‐SILPs)

Misra, Archismita; Zambrzycki, Christian; Kloker, Gabriele; Kotyrba, Anika; Anjass, Montaha; Castillo, Isabel Franco; Mitchell, Scott G.; Güttel, Robert; Streb, Carsten

doi:10.1002/ange.201912111

Cited by 11 publications

(2 citation statements)

References 34 publications

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“…Preparation of the spherical encapsulated Fe catalysts was done by microemulsion method as recently published [24] (detailed description in ESI) adjusting a Fe mass fraction of 15 wt% for all samples. The Fe particle size distribution of three different as-prepared core-shell catalysts was obtained from TEM micrographs (Fig.…”

Section: Resultsmentioning

confidence: 99%

Fe based core–shell model catalysts for the reaction of CO2 with H2

Kirchner

Zambrzycki

Baysal

et al. 2020

Reac Kinet Mech Cat

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Fe@SiO2 core–shell model catalysts were investigated for the conversion of CO2 and H2 into CH4, CO and H2O. For evaluation of the effect of core size on the catalytic activity, samples with Fe particle sizes of 4, 6 and 8 nm were prepared. Fresh and spent catalysts were thoroughly characterized by X-ray diffraction, 57Fe Mössbauer spectroscopy, transmission electron microscopy, temperature programmed hydrogenation and X-ray photoelectron spectroscopy. As a result, the yield of the major product CO as well as CH4 was increased with Fe core size. Additionally, growing Fe cores led to stronger carburization and higher amount of reactive carbide entities, which drive the CH4 formation. Finally, formation of inactive bulk carbon deposition is strongly suppressed for the core–shell catalysts in comparison to bulk iron oxide catalysts used for CO2 hydrogenation.

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Section: Resultsmentioning

confidence: 99%

Fe based core–shell model catalysts for the reaction of CO2 with H2

Kirchner

Zambrzycki

Baysal

et al. 2020

Reac Kinet Mech Cat

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“…The core-shell catalyst was prepared using an adapted reverse microemulsion method [15]. For the oil phase 100 mL cyclohexane (VWR Chemicals, AnalaR NORMAPUR ) was mixed with 34.2 g of polyoxyethylene (10) cetyl ether (Brij C10, Sigma Aldrich/Merck) and heated to 50°C.…”

Section: Catalyst Preparationmentioning

confidence: 99%

CO₂ Methanation on Fe Catalysts Using Different Structural Concepts

Kirchner

Zambrzycki

Kureti

et al. 2020

Chemie Ingenieur Technik

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This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.The hydrogenation of carbon dioxide towards methane and water is evaluated on different types of iron catalysts. The catalysts refer to different structural concepts implying a bare iron oxide, a silica-supported and a core-shell system. Highest CO 2 conversion of about 20 % is achieved with the bulk catalysts and the supported material. However, although revealing reduced CH 4 formation rate, the core-shell catalyst exhibits pronounced resistance against coke formation as well as thermal sintering and particle attrition upon syngas reaction.

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Confinement of CoP Nanoparticles in Nitrogen‐Doped Yolk‐Shell Porous Carbon Polyhedron for Ultrafast Catalytic Oxidation

Zhu

Zhao

Fan

et al. 2020

Adv Funct Materials

122

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Catalytic oxidation of toxic organic pollutants in water urgently requires improved efficiency for practical application. Here a wrapping-pyrolysis strategy is exploited to convert CoP nanowires-threaded ZIF-8 into CoP nanoparticlesconfined nitrogen-doped yolk-shell porous carbon polyhedra, featuring highdensity active sites, and high adsorbability, dispersibility and conductivity (4-High). The nanoreactor efficiently activates peroxymonosulfate for bisphenol A (BPA) degradation over a wide pH range and in saline solutions. The apparent kinetic rate constant (18.96 min −1) is the highest reported to date and exceeds those of reported catalysts by 1-2 orders of magnitude. Experimental and theoretical evidence reveals that the catalysis occurs at the Co 4 P 4 @graphitic nitrogen-doped graphene site to produce surface-bound SO 4 •− and induce direct electron abstraction for BPA degradation. The high catalytic activity is attributed to the unique yolk-shell structure which concentrates catalytic and adsorptive sites within a confined space, as well as to the porous carbon polyhedron with high dispersibility and conductivity for fast mass and electron transport. Moreover, a fluidized-bed catalytic unit is constructed and enables continuous zero discharge of BPA and easy nanocatalyst recycling. This work will guide "4-High" catalyst design to improve future deep water purification technology.

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Wasseraufreinigung und Mikroplastik‐Entferung durch magnetische Polyoxometallat‐unterstützte ionische Flüssigphasen (magPOM‐SILPs)

Cited by 11 publications

References 34 publications

Fe based core–shell model catalysts for the reaction of CO2 with H2

Fe based core–shell model catalysts for the reaction of CO2 with H2

CO₂ Methanation on Fe Catalysts Using Different Structural Concepts

Confinement of CoP Nanoparticles in Nitrogen‐Doped Yolk‐Shell Porous Carbon Polyhedron for Ultrafast Catalytic Oxidation

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Wasseraufreinigung und Mikroplastik‐Entferung durch magnetische Polyoxometallat‐unterstützte ionische Flüssigphasen (magPOM‐SILPs)

Cited by 11 publications

References 34 publications

Fe based core–shell model catalysts for the reaction of CO2 with H2

Fe based core–shell model catalysts for the reaction of CO2 with H2

CO2 Methanation on Fe Catalysts Using Different Structural Concepts

Confinement of CoP Nanoparticles in Nitrogen‐Doped Yolk‐Shell Porous Carbon Polyhedron for Ultrafast Catalytic Oxidation

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Product

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About

CO₂ Methanation on Fe Catalysts Using Different Structural Concepts