Synthesis and Structuring of Ni MoS<sub>2</sub> by using an Ionic Liquid

Leyral, Géraldine; Ribes, M.; Courthéoux, Laurence; Uzio, Denis; Pradel, Annie

doi:10.1002/ejic.201200935

Cited by 21 publications

(19 citation statements)

References 31 publications

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“…Without polymer, a second phase corresponding to nickel sulfide NiS is also observed. The formation of nickel sulfide phase has already been observed in several synthesis of NiMoS catalysts [21,26,32]. This may be due to the reaction between the sulfur expelled during the thermal treatment and some Ni that is not used to form the mixed Ni-Mo-S phase.…”

Section: Samplementioning

confidence: 91%

“…For the hydrothermal synthesis of Ni-promoted MoS 2 in the presence of decalin, Yoosuk et al [25] have shown that by increasing the temperature to 375 • C and the pressure up to 2.8 MPa, a very high specific surface area up to 250 m 2 •g −1 could be obtained. Recently, we have reported a first series of data on the preparation of Ni-promoted MoS 2 catalysts in the presence of an ionic liquid and their physicochemical characterization has shown different morphologies and an increase of the specific surface area depending on the amount of ionic liquid [26].…”

Section: Of 17mentioning

confidence: 99%

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Influence of Pluronic® P123 Addition in the Synthesis of Bulk Ni Promoted MoS2 Catalyst. Application to the Selective Hydrodesulfurization of Sulfur Model Molecules Representative of FCC Gasoline

et al. 2019

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A way to improve hydrotreatment processes is to enhance the intrinsic activity of Ni or Co promoted MoS2 catalysts that are commonly used in such reactions. The aim of this work was to investigate the impact of the presence of Pluronic® P123 as a structuring agent during the synthesis of Ni promoted MoS2 catalysts (named NiMoS) in water at room temperature. A series of analyses, i.e., X-ray diffraction (XRD), chemical analysis, inductively coupled plasma mass spectrometry (ICP-MS), nitrogen adsorption-desorption isotherms, transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS), helped in characterizing the NiMoS-P123 and NiMoS catalysts, the latter being prepared in the absence of polymer. Both compounds contained MoS2 phase (~85 atomic% considering Mo atoms), a similar amount of mixed Ni-Mo-S phase (40–50% considering Ni) and some amount of NiS and Ni-oxidized impurity phases. The main differences between the two catalysts were a much larger specific surface area (126 m2·g−1 instead of 31 m²·g−1) and a better dispersion of the active phase as shown by the lower slab stacking (2.7 instead of 4.8) for NiMoS-P123, and the presence of C in NiMoS-P123 (9.4 wt.% instead of 0.6 wt.%), indicating an incomplete decomposition of the polymer during thermal treatment. Thanks to its larger specific surface area and lower slab stacking and therefore modification of active Mo site properties, the compound prepared in the presence of Pluronic® P123 exhibits a strong increase of the catalytic activity expressed per Mo atom for the transformation of 3-methylthiophene. Such improvement in catalytic activity was not observed for the transformation of benzothiophene likely due to poisonous residual carbon which results from the presence of Pluronic® P123 during the synthesis.

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Section: Samplementioning

confidence: 91%

Section: Of 17mentioning

confidence: 99%

Influence of Pluronic® P123 Addition in the Synthesis of Bulk Ni Promoted MoS2 Catalyst. Application to the Selective Hydrodesulfurization of Sulfur Model Molecules Representative of FCC Gasoline

et al. 2019

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“…We found a decrease of the lower BE component as the Ni amount increases, The Ni 2p 3/2 peak was separated into chemically shifted components to identify the Ni species. Three components at BEs of 853.5, 855.0, and 856.6 eV were included in the fit, which were attributed to NiS x -like structure, Ni-Mo-S structure, and NiO x species, respectively, according to the literature [52,53,[62][63][64]. Then, we analyzed the evolution of each component as a function of the Ni doping ( Figure 3E, Table S2).…”

Section: Synthesis and Physicochemical Characterizationmentioning

confidence: 99%

Effect of Ni Doping on the MoS2 Structure and Its Hydrogen Evolution Activity in Acid and Alkaline Electrolytes

et al. 2019

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We have investigated three-dimensional (3D) MoS2 nanoarchitectures doped with different amount of Ni to boost the hydrogen evolution reaction (HER) in alkaline environment, where this reaction is normally hindered. As a comparison, the activity in acidic media was also investigated to determine and compare the role of the Ni sites in both media. The doping of MoS2, especially at high loadings, can modify its structural and/or electronic properties, which can also affect the HER activity. The structural and electronic properties of the Ni doped 3D-MoS2 nanoarchitecture were studied by X-ray diffraction (XRD), Raman spectroscopy, scanning and transmission electronic microscopy (SEM; TEM), and X-ray photoemission Spectroscopy (XPS). XPS also allowed us to determine the Ni-based species formed as a function of the dopant loading. The HER activity of the materials was investigated by linear sweep voltammetry (LSV) in 0.5 M H2SO4 and 1.0 M KOH. By combining the physicochemical and electrochemical results, we concluded that the Ni sites have a different role in the HER mechanism and kinetics in acidic and in alkaline media. Thus, NiSx species are essential to promote HER in alkaline medium, whereas the Ni-Mo-S ones enhance the HER in acid medium.

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“…11,12 The magnetic and electronic properties of MoS 2 nanoribbons could be tuned by 3d TMs doping. Either 3d TM substrates or 3d TM nanoclusters could 35 alter the electronic structures of MoS 2 monolayer.…”

Section: Introductionmentioning

confidence: 99%

Effects of 3d transition-metal doping on electronic and magnetic properties of MoS₂nanoribbons

Tian

Liu

et al. 2015

Phys. Chem. Chem. Phys.

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The electronic and magnetic properties of MoS2 nanoribbons doped with 3d transitional metals (TMs) were investigated using first-principles calculations. Clean armchair MoS2 nanoribbons (AMoS2NRs) are nonmagnetic semiconductors whereas clean zigzag MoS2 nanoribbons (ZMoS2NRs) are metallic magnets. The 3d TM impurities tend to substitute the outermost cations of AMoS2NRs and ZMoS2NRs, which are in agreement with the experimental results reported. The magnetization of the 3d-TM-impurity-doped AMoS2NRs and ZMoS2NRs is configuration dependent. The band gap and carrier concentration of AMoS2NRs can be tuned by 3d-TM doping. Fe-doped AMoS2NRs exhibit ferromagnetic characteristics and the Curie temperature (T(C)) can be tuned using different impurity concentrations. Co-doped ZMoS2NRs are strongly ferromagnetic with a T(C) above room temperature.

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Synthesis and Structuring of Ni MoS₂ by using an Ionic Liquid

Cited by 21 publications

References 31 publications

Influence of Pluronic® P123 Addition in the Synthesis of Bulk Ni Promoted MoS2 Catalyst. Application to the Selective Hydrodesulfurization of Sulfur Model Molecules Representative of FCC Gasoline

Influence of Pluronic® P123 Addition in the Synthesis of Bulk Ni Promoted MoS2 Catalyst. Application to the Selective Hydrodesulfurization of Sulfur Model Molecules Representative of FCC Gasoline

Effect of Ni Doping on the MoS2 Structure and Its Hydrogen Evolution Activity in Acid and Alkaline Electrolytes

Effects of 3d transition-metal doping on electronic and magnetic properties of MoS₂nanoribbons

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Synthesis and Structuring of Ni MoS2 by using an Ionic Liquid

Cited by 21 publications

References 31 publications

Influence of Pluronic® P123 Addition in the Synthesis of Bulk Ni Promoted MoS2 Catalyst. Application to the Selective Hydrodesulfurization of Sulfur Model Molecules Representative of FCC Gasoline

Influence of Pluronic® P123 Addition in the Synthesis of Bulk Ni Promoted MoS2 Catalyst. Application to the Selective Hydrodesulfurization of Sulfur Model Molecules Representative of FCC Gasoline

Effect of Ni Doping on the MoS2 Structure and Its Hydrogen Evolution Activity in Acid and Alkaline Electrolytes

Effects of 3d transition-metal doping on electronic and magnetic properties of MoS2nanoribbons

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Synthesis and Structuring of Ni MoS₂ by using an Ionic Liquid

Effects of 3d transition-metal doping on electronic and magnetic properties of MoS₂nanoribbons