Effect of the presence of ionic liquid during the NiMoS bulk preparation in the transformation of decanoic acid

Leyral, Géraldine; Brillouet, Soizic; Rousseau, Julie; Richard, Frédéric; Mamede, Anne-Sophie; Courthéoux, Laurence; Pradel, Annie; Ribes, M.; Brunet, Sylvette

doi:10.1016/j.apcata.2016.12.020

Cited by 8 publications

(10 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although the Ni content in these substances is not specified, as characterized by XPS, the proportion of the NiMoS phase is ∼70% for all NiMoS samples (Table S2 in Supporting Information). Aside from the MoS 2 reflections, a few of the NiS x species (<15%) in the sulfided NiMo catalyst are inevitably detected by XRD and XPS, commonly appearing on the unsupported and supported Ni(Co)MoS catalysts. ,, Ni was not always completely incorporated into the NiMoS phase and appeared in the phase of Ni 3 S 2 , even though the role of NiS x (CoS x ) phase has not been completely understood. , Therefore, the NiMoS catalysts are endowed with the phases of MoS 2 and Ni 3 S 2 .…”

Section: Results and Discussionmentioning

confidence: 99%

Fabrication of 3D Porous Hierarchical NiMoS Flowerlike Architectures for Hydrodesulfurization Applications

Song

Lai

Chen

et al. 2017

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Layered transition-metal sulfides such as MoS2 often show a range of intriguing electronic, catalytic, and optical properties. Because of their high surface energy, layered materials generally tend to stack and prevent the exposure of additional edge sites. Here, we demonstrate a facile approach for the preparation of hierarchical NiMoS nanoflowers via SiO2-assisted hydrothermal synthesis. The structure and morphology of the nanomaterials are characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Raman, and X-ray photoelectron spectroscopy analyses, revealing that different sizes of NiMoS nanoflowers assembled from various nanosheet thicknesses can be tuned by modifying the Si/Mo molar ratio. The key aspect of this strategy is to construct the three-dimensional nanostructures around the SiO2 nanospheres while maintaining a flowerlike feature. The correlation between the nanosheet thickness, surface area, and total dispersion of the Mo atoms indicated that the large quantity and efficient accessibility of NiMoS active sites originating from the synergistically multiscale structure and atom-scale modulations between MoS2 and Ni atoms are the determining factors for the observed impressive hydrodesulfurization performance and the stable recyclability of these materials.

show abstract

Section: Results and Discussionmentioning

confidence: 99%

Fabrication of 3D Porous Hierarchical NiMoS Flowerlike Architectures for Hydrodesulfurization Applications

Song

Lai

Chen

et al. 2017

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…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: 90%

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…For the catalyst, note that although the synthesis of chemically Co/Ni-doped MoS 2 has been reported by different methods, the Co/Ni sulfide species were simultaneously formed in the sample because of the distinct different precipitation rate between metal ions and S 2– ion. , Unfortunately, the formed large Co/Ni sulfide crystals made no distinctive contributions to the hydrodesulfurization (HDS)/HDO activity of MoS 2 . Hence, it would be most important to highly disperse Co/Ni atoms on the MoS 2 surface, generating abundant Co–Mo–S active phase.…”

Section: Introductionmentioning

confidence: 99%

Surface Engineering of CoMoS Nanosulfide for Hydrodeoxygenation of Lignin-Derived Phenols to Arenes

et al. 2018

View full text Add to dashboard Cite

We propose a surface atom engineering strategy to obtain a well-dispersed Co-incorporated MoS2 nanomaterial, which maximizes the Co–Mo–S phase and achieves high activity in hydrodeoxygenation (HDO) of lignin-derived phenolic compounds. It was shown by X-ray diffraction, transmission electron microscopy, Ramanspectroscopy, high-sensitivity low-energy ion scattering, and X-ray photoelectron spectroscopy that plenty of accessible Co–Mo–S phase were generated on the catalyst surface, which could accelerate the hydrodeoxygenation (HDO) reaction. Notably, most of the Co–Mo–S phases were located at the top surface of MoS2, which explained the full deoxygenation performance of the CoMoS catalyst. Moreover, among the diverse lignin-derived oxygenated compounds, phenolic hydroxyl HDO was structure-sensitive relative to diphenyl ether over Co-doped MoS2 catalysts. Effective conversion of mixed phenols to corresponding arenes such as BTX (benzene, toluene, and xylene) with high yield (>85%) and stable recyclability was exhibited by using the CoMoS catalyst with highly dispersed Co–Mo–S phase.

show abstract

Effect of the presence of ionic liquid during the NiMoS bulk preparation in the transformation of decanoic acid

Cited by 8 publications

References 36 publications

Fabrication of 3D Porous Hierarchical NiMoS Flowerlike Architectures for Hydrodesulfurization Applications

Fabrication of 3D Porous Hierarchical NiMoS Flowerlike Architectures for Hydrodesulfurization Applications

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

Surface Engineering of CoMoS Nanosulfide for Hydrodeoxygenation of Lignin-Derived Phenols to Arenes

Contact Info

Product

Resources

About