2017 |
Aliaga, J A; Zepeda, T; Araya, J F; Paraguay-Delgado, F; Benavente, E; Alonso-Nunez, G; Fuentes, S; González, G Low-Dimensional Res2/C Composite as Effective Hydrodesulfurization Catalyst Artículo de revista Catalysts, 7 (12), 2017, ISSN: 2073-4344. Resumen | Enlaces | BibTeX | Etiquetas: carbon chemical-vapor-deposition, decomposition, disulfide, few-layer growth, hidrodesulfurization, in-situ large-area, layer, light nanosheets, res2, rhenium s-hydrocarbons, single solvothermal synthesis, technetium, thiophene @article{RN348, title = {Low-Dimensional Res2/C Composite as Effective Hydrodesulfurization Catalyst}, author = { J.A. Aliaga and T. Zepeda and J.F. Araya and F. Paraguay-Delgado and E. Benavente and G. Alonso-Nunez and S. Fuentes and G. Gonz\'{a}lez}, url = {/brokenurl#<Go to ISI>://WOS:000419187400024}, doi = {10.3390/catal7120377}, issn = {2073-4344}, year = {2017}, date = {2017-01-01}, journal = {Catalysts}, volume = {7}, number = {12}, abstract = {Single-layer, ultrasmall ReS2 nanoplates embedded in amorphous carbon were synthesized from a hydrothermal treatment involving ammonium perrhenate, thiourea, tetraoctylammonium bromide, and further annealing. The rhenium disulfide, obtained as a low dimensional carbon composite (ReS2/C), was tested in the hydrodesulfurization of light hydrocarbons, using 3-methylthiophene as the model molecule, and showed enhanced catalytic activity in comparison with a sulfide CoMo/gamma-Al2O3 catalyst. The ReS2/C composite was characterized by X-ray diffraction (XRD), Raman spectroscopy, N-2 adsorption-desorption isotherms, scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). The improved catalytic performance of this ReS2/C composite may be ascribed to the presence of a non-stoichiometric sulfur species (ReS2-x), the absence of stacking along the c-axis, and the ultra-small basal planes, which offer a higher proportion of structural sulfur defects at the edge of the layers, known as a critical parameter for hydrodesulfurization catalytic processes.}, keywords = {carbon chemical-vapor-deposition, decomposition, disulfide, few-layer growth, hidrodesulfurization, in-situ large-area, layer, light nanosheets, res2, rhenium s-hydrocarbons, single solvothermal synthesis, technetium, thiophene}, pubstate = {published}, tppubtype = {article} } Single-layer, ultrasmall ReS2 nanoplates embedded in amorphous carbon were synthesized from a hydrothermal treatment involving ammonium perrhenate, thiourea, tetraoctylammonium bromide, and further annealing. The rhenium disulfide, obtained as a low dimensional carbon composite (ReS2/C), was tested in the hydrodesulfurization of light hydrocarbons, using 3-methylthiophene as the model molecule, and showed enhanced catalytic activity in comparison with a sulfide CoMo/gamma-Al2O3 catalyst. The ReS2/C composite was characterized by X-ray diffraction (XRD), Raman spectroscopy, N-2 adsorption-desorption isotherms, scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). The improved catalytic performance of this ReS2/C composite may be ascribed to the presence of a non-stoichiometric sulfur species (ReS2-x), the absence of stacking along the c-axis, and the ultra-small basal planes, which offer a higher proportion of structural sulfur defects at the edge of the layers, known as a critical parameter for hydrodesulfurization catalytic processes. |
Aliaga, J A; Zepeda, T N; Pawelec, B N; Araya, J F; Antunez-Garcia, J; Farias, M H; Fuentes, S; Galvan, D; Alonso-Nunez, G; González, G Microspherical Res2 as a High-Performance Hydrodesulfurization Catalyst Artículo de revista Catalysis Letters, 147 (5), pp. 1243-1251, 2017, ISSN: 1011-372x. Resumen | Enlaces | BibTeX | Etiquetas: carbon, catalysis, composites, dichalcogenides, disulfide, evolution, heterogeneous hidrodesulfurization, hydrodeoxygenation, hydrogen molybdenum-disulfide, nanoparticles, nanosized rhenium solvothermal sulfide, sulfides, synthesis, technetium transition-metal @article{RN349, title = {Microspherical Res2 as a High-Performance Hydrodesulfurization Catalyst}, author = { J.A. Aliaga and T.N. Zepeda and B.N. Pawelec and J.F. Araya and J. Antunez-Garcia and M.H. Farias and S. Fuentes and D. Galvan and G. Alonso-Nunez and G. Gonz\'{a}lez}, url = {/brokenurl#<Go to ISI>://WOS:000400356200016}, doi = {10.1007/s10562-017-2024-6}, issn = {1011-372x}, year = {2017}, date = {2017-01-01}, journal = {Catalysis Letters}, volume = {147}, number = {5}, pages = {1243-1251}, abstract = {An unsupported microspherical ReS2 catalyst, consisting in self-assembled nano-layers, was evaluated in the hydrodesulfurization (HDS) of 3-methylthiophene showing an excellent catalytic activity. The samples were characterized by X-ray diffraction, scanning electron microscopy, high resolution electron microscopy, energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy. These techniques revealed that the rhenium disulfide layers are confined to a 3D hierarchical structure with different stacking, slab size and bending, according to the annealing temperature (400 or 800 A degrees C). The presence of a defect-rich structure in the microspheres, with short and randomly-orientated ReS2 slabs, results in the exposure of additional edge sites, which improve the catalytic performance of this material. This microspherical ReS2 composite, with good HDS performance, is a promising catalyst for the desulfurization of fuel oils; the solvothermal reaction conditions are also useful to tune and create exotic morphologies for the design of new ReS2 catalysts.}, keywords = {carbon, catalysis, composites, dichalcogenides, disulfide, evolution, heterogeneous hidrodesulfurization, hydrodeoxygenation, hydrogen molybdenum-disulfide, nanoparticles, nanosized rhenium solvothermal sulfide, sulfides, synthesis, technetium transition-metal}, pubstate = {published}, tppubtype = {article} } An unsupported microspherical ReS2 catalyst, consisting in self-assembled nano-layers, was evaluated in the hydrodesulfurization (HDS) of 3-methylthiophene showing an excellent catalytic activity. The samples were characterized by X-ray diffraction, scanning electron microscopy, high resolution electron microscopy, energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy. These techniques revealed that the rhenium disulfide layers are confined to a 3D hierarchical structure with different stacking, slab size and bending, according to the annealing temperature (400 or 800 A degrees C). The presence of a defect-rich structure in the microspheres, with short and randomly-orientated ReS2 slabs, results in the exposure of additional edge sites, which improve the catalytic performance of this material. This microspherical ReS2 composite, with good HDS performance, is a promising catalyst for the desulfurization of fuel oils; the solvothermal reaction conditions are also useful to tune and create exotic morphologies for the design of new ReS2 catalysts. |
2017 |
Low-Dimensional Res2/C Composite as Effective Hydrodesulfurization Catalyst Artículo de revista Catalysts, 7 (12), 2017, ISSN: 2073-4344. |
Microspherical Res2 as a High-Performance Hydrodesulfurization Catalyst Artículo de revista Catalysis Letters, 147 (5), pp. 1243-1251, 2017, ISSN: 1011-372x. |