Effect of graphitic carbon modification on the catalytic performance of Fe@SiO2-GC catalysts for forming lower olefins via Fischer-Tropsch synthesis

Ni, Zhijiang; Qin, Hengfei; Kang, Shifei; Bai, Jirong; Wang, Zhilei; Li, Yaguang; Zhang, Zheng; Li, Xi

doi:10.1016/j.jcis.2018.01.017

Cited by 23 publications

(14 citation statements)

References 51 publications

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“…Thus, core-shell particles have been utilized as a model catalyst in fundamental research, as for bioimaging, drug delivery, semiconductor processing, and as a coating admixture [1]. In addition, these materials are investigated for several industrial catalytic applications, e.g., esterification [2], ammonia decomposition [3], olefin hydrogenation [4], and Fischer-Tropsch synthesis [5], where the particles showed high structural stability.…”

Section: Introductionmentioning

confidence: 99%

Iron Based Core-Shell Structures as Versatile Materials: Magnetic Support and Solid Catalyst

et al. 2021

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Core-shell materials are promising functional materials for fundamental research and industrial application, as their properties can be adapted for specific applications. In particular, particles featuring iron or iron oxide as core material are relevant since they combine magnetic and catalytic properties. The addition of an SiO2 shell around the core particles introduces additional design aspects, such as a pore structure and surface functionalization. Herein, we describe the synthesis and application of iron-based core-shell nanoparticles for two different fields of research that is heterogeneous catalysis and water purification. The iron-based core shell materials were characterized by transmission electron microscopy, as well as N2-physisorption, X-ray diffraction, and vibrating-sample magnetometer measurements in order to correlate their properties with the performance in the target applications. Investigations of these materials in CO2 hydrogenation and water purification show their versatility and applicability in different fields of research and application, after suitable individual functionalization of the core-shell precursor. For design and application of magnetically separable particles, the SiO2 shell is surface-functionalized with an ionic liquid in order to bind water pollutants selectively. The core requires no functionalization, as it provides suitable magnetic properties in the as-made state. For catalytic application in synthesis gas reactions, the SiO2-stabilized core nanoparticles are reductively functionalized to provide the catalytically active metallic iron sites. Therefore, Fe@SiO2 core-shell nanostructures are shown to provide platform materials for various fields of application, after a specific functionalization.

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Section: Introductionmentioning

confidence: 99%

Iron Based Core-Shell Structures as Versatile Materials: Magnetic Support and Solid Catalyst

et al. 2021

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“…Fe based core-shell catalysts are already studied for a broad variety of important catalytic processes, e.g. esterification [20], ammonia decomposition [19], alcohol oxidation [21], olefin hydrogenation [22] and Fischer-Tropsch synthesis [23]. Contrary, no papers are reported so far for the investigation of Fe containing core-shell catalysts in the hydrogenation of CO 2 to CH 4 ( CO 2 + 4H 2 ⇌ CH 4 + 2H 2 O; ΔH = − 165 kJ mol −1 ).…”

Section: Introductionmentioning

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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“…However, no unanimous understanding exists on the detailed structure of active carbide species (specifically iron carbide bulk phase or surface carbide), due to the highly dynamic and complex structural changes of Fe catalysts during CO x hydrogenation. In this context, core‐shell catalysts are known to reveal high stability as also proven within this work and are already investigated for esterification , ammonia decomposition , olefin hydrogenation and Fischer‐Tropsch synthesis , . Although synthesis of core‐shell catalysts is rather complex, unique properties are achieved, e.g., narrow particle size distribution, resulting in outstanding materials for scientific research, as recently shown for methanation .…”

Section: Introductionmentioning

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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Effect of graphitic carbon modification on the catalytic performance of Fe@SiO2-GC catalysts for forming lower olefins via Fischer-Tropsch synthesis

Cited by 23 publications

References 51 publications

Iron Based Core-Shell Structures as Versatile Materials: Magnetic Support and Solid Catalyst

Iron Based Core-Shell Structures as Versatile Materials: Magnetic Support and Solid Catalyst

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

CO₂ Methanation on Fe Catalysts Using Different Structural Concepts

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Effect of graphitic carbon modification on the catalytic performance of Fe@SiO2-GC catalysts for forming lower olefins via Fischer-Tropsch synthesis

Cited by 23 publications

References 51 publications

Iron Based Core-Shell Structures as Versatile Materials: Magnetic Support and Solid Catalyst

Iron Based Core-Shell Structures as Versatile Materials: Magnetic Support and Solid Catalyst

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

CO2 Methanation on Fe Catalysts Using Different Structural Concepts

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Product

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CO₂ Methanation on Fe Catalysts Using Different Structural Concepts