Promoted effect of alkalization on the catalytic performance of Rh/alk-Ti 3 C 2 X 2 (X O, F) for the hydrodechlorination of chlorophenols in base-free aqueous medium

Mei, Ming; Ren, Yanlin; Hu, Min; Zhang, Yun; Sun, Tian; Ma, Yuling; Li, Xiaojing; Jiang, Weidong; Gao, Daojiang; Bi, Jian; Fan, Guangyin

doi:10.1016/j.apcatb.2017.04.017

Cited by 81 publications

(36 citation statements)

References 52 publications

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“…Recently, we observed a considerable increase in the dispersion of magnetite particles supported on activated charcoal due to preliminary alkalization of the support . Similar effect was described earlier for Rh nanoparticles . The conceivable reason for this may be the increased concentration of oxygen‐containing groups on charcoal surface due to KNO 3 deposition and subsequent thermal decomposition.…”

Section: Resultssupporting

confidence: 78%

Carbon–Silica Composite as an Effective Support for Iron Fischer–Tropsch Synthesis Catalysts

et al. 2019

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Carbon–silica composite is prepared by the impregnation of silica with aqueous glucose solution followed by drying and calcination in an inert atmosphere. This material is proposed as a support for the potassium‐promoted iron catalysts for Fischer–Tropsch synthesis (FTS). The catalysts are prepared by incipient wetness impregnation. The reducibility of CQ‐supported iron is increased and Hägg carbide is formed in the course of activation in CO/H2 flow at 400 °C for 2 h. Subsequent exposure in FTS conditions results in the significant increase of iron carbide particles, from 3–4 to 20–30 nm, while no such increase is detected for the pure silica as support. The carbon–silica composite support provides a beneficial effect on the catalytic activity of iron in CO hydrogenation as well as the suppression of methane formation and increasing Anderson–Schulz–Flory distribution (ASF) chain growth parameter. The catalysts are characterized by nitrogen adsorption, X‐ray absorption spectroscopy (XPS), transmission electron microscopy (TEM), and in situ magnetic measurements in the course of temperature‐programmed reduction by H2 and synthesis gas.

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Section: Resultssupporting

confidence: 78%

Carbon–Silica Composite as an Effective Support for Iron Fischer–Tropsch Synthesis Catalysts

et al. 2019

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“…7,8 Many studies have considered different modications of MXenes' surfaces, which were carried out in order to tailor their specic chemical activities. The surface-modications with nanoparticles that have been introduced for MXenes include: SnO 2 , 9,10 TiO 2 , [11][12][13][14][15][16][17][18] Nb 2 O 5 , 13 Cu 2 O, 19,20 Rh, 21 Ru, 22 bimetallic Ru/Ni 23 or Co/Ni, 24 Mn 3 O 4 , 25 MnO 2 , 26 Sb 2 O 3 , 27 NiO 2 , 28 the transition metals Fe, Co, and Ni, 29 and Ni/Al hydroxide. 30 Additionally, some interesting antimicrobial 2D heterostructures based on Ti 3 C 2 MXene were also prepared.…”

Section: Introductionmentioning

confidence: 99%

Influence of modification of Ti₃C₂ MXene with ceramic oxide and noble metal nanoparticles on its antimicrobial properties and ecotoxicity towards selected algae and higher plants

Rozmysłowska-Wojciechowska

Karwowska

Позняк

et al. 2019

RSC Adv.

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“…Am odald iameter of 10-15 nm is observed for Fe/AC and 4-6 nm for promoted catalysts ( Figure 2). [39] Furthermore, the type of anion in alkali may matter.T hermal decomposition of supported KNO 3 is accompanied by oxidation of carbon surface by nitrate ion. On Figure 2).…”

Section: Resultsmentioning

confidence: 99%

“…As imilare ffect of alkalization on the size of supported Rh nanoparticles was recently described. [39] Furthermore, the type of anion in alkali may matter.T hermal decomposition of supported KNO 3 is accompanied by oxidation of carbon surface by nitrate ion. This process presumably yields higher surfacec oncentration of oxygen-containing groups and therefore higher amount of nucleation centers than that for carbonate-derived catalysts.…”

Section: Resultsmentioning

confidence: 99%

Potassium as a Structural Promoter for an Iron/Activated Carbon Catalyst: Unusual Effect of Component Deposition Order on Magnetite Particle Size and Catalytic Behavior in Fischer–Tropsch Synthesis

et al. 2018

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The structural and catalytic properties of nanosized Fe3O4 particles deposited on activated charcoal (AC) are drastically affected by the sequence of component deposition order. Preliminary alkalization of AC followed by Fe deposition leads to formation of small magnetite particles (modal size of 4 nm) with uniform distribution. This catalyst demonstrates much higher iron‐time yield in FT synthesis than counterparts prepared by co‐impregnation and sequential impregnation with a reverse order of component deposition (Fe, then K). The catalysts were characterized by nitrogen adsorption, X‐ray diffraction, transmission electron microscopy, temperature‐programmed reduction in Ar/H2, and CO/H2 flow and in situ magnetic measurements. After calcinations in argon, catalysts contain iron predominantly in the form of magnetite with minor amount of hematite in some cases. Activation of the catalyst in the CO/H2 stream prior catalytic test leads to the formation of surface Hegg carbide Fe5C2. Spent catalysts contain considerable amount of magnetite, which is presumably due to partial oxidation of carbide by water in the course of the FT reaction.

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Promoted effect of alkalization on the catalytic performance of Rh/alk-Ti 3 C 2 X 2 (X O, F) for the hydrodechlorination of chlorophenols in base-free aqueous medium

Cited by 81 publications

References 52 publications

Carbon–Silica Composite as an Effective Support for Iron Fischer–Tropsch Synthesis Catalysts

Carbon–Silica Composite as an Effective Support for Iron Fischer–Tropsch Synthesis Catalysts

Influence of modification of Ti₃C₂ MXene with ceramic oxide and noble metal nanoparticles on its antimicrobial properties and ecotoxicity towards selected algae and higher plants

Potassium as a Structural Promoter for an Iron/Activated Carbon Catalyst: Unusual Effect of Component Deposition Order on Magnetite Particle Size and Catalytic Behavior in Fischer–Tropsch Synthesis

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Promoted effect of alkalization on the catalytic performance of Rh/alk-Ti 3 C 2 X 2 (X O, F) for the hydrodechlorination of chlorophenols in base-free aqueous medium

Cited by 81 publications

References 52 publications

Carbon–Silica Composite as an Effective Support for Iron Fischer–Tropsch Synthesis Catalysts

Carbon–Silica Composite as an Effective Support for Iron Fischer–Tropsch Synthesis Catalysts

Influence of modification of Ti3C2 MXene with ceramic oxide and noble metal nanoparticles on its antimicrobial properties and ecotoxicity towards selected algae and higher plants

Potassium as a Structural Promoter for an Iron/Activated Carbon Catalyst: Unusual Effect of Component Deposition Order on Magnetite Particle Size and Catalytic Behavior in Fischer–Tropsch Synthesis

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Influence of modification of Ti₃C₂ MXene with ceramic oxide and noble metal nanoparticles on its antimicrobial properties and ecotoxicity towards selected algae and higher plants