Ruthenium nanoparticles embedded in mesoporous carbon microfibers: preparation, characterization and catalytic properties in the hydrogenation of d-glucose

Abstract

Ruthenium (Ru) nanoparticles dispersed in mesoporous carbon microfibers were prepared using alumina microfibers as the templates via a chemical vapour deposition (CVD) route. Characterized data showed that Ru nanoparticles were embedded in the mesoporous carbon matrix. The samples were found to possess a specific surface area as high as 750 m(2) g(-1), pore sizes in the range of 3-5 nm, lengths in the range of 5-10 μm, and a width of about 0.5 μm. The Ru catalysts displayed a remarkably high catalytic activity and an excellent stability in the hydrogenation of D-glucose. The observed good catalyst performance is attributed to the carbon microfiber morphology, unblocked mesoporous structure, and the hydrogen spillover effect induced by the unique surface contact between the Ru nanoparticles and the carbon. In addition, the incorporation of nitrogen significantly improved the catalytic performance due to the enhanced hydrogen adsorption, better wettability, and modified electronic properties of the Ru.

Functionalizing Reduced Graphene Oxide with Ru‐Organometallic Compounds as an Effective Strategy to Produce High‐Performance Pt Nanocatalysts for the Methanol Oxidation Reaction

“…Additionally, such peak overlaps with hcp and eventually fcc Ru planes (due to structural interactions with fcc Pt). Also, a low‐intensity reflection at 2 θ =69.5° in Figure a) can be attributed to the (110) Ru plane . Figure b) displays the deconvolution of the broad peak, showing the contributions of the (100), (002) and (101) hcp Ru reflections, as well as the (111) fcc Ru peak.…”

“…Also, a low-intensity reflection at 2θ = 69.5°in Figure 3 a) can be attributed to the (110) Ru plane. [47] Figure 3 b) displays the deconvolution of the broad peak, showing the contributions of the (100), (002) and (101) hcp Ru reflections, as well as the (111) fcc Ru peak. These characteristics strongly suggest the formation of PtÀ Ru alloyed phases at Pt/rGO Ru-dim , with metallic Ru being formed from the organometallic compound.…”

Recent advances in the production of polyols from lignocellulosic biomass and biomass-derived compounds

“…Because of the superior mass transfer ability from micropore to liquid phase and the better desorption ability of sorbitol than the conventional carbon, woven rayon fabric derived active carbon cloths supported ruthenium showed outstanding performance in hydrogenation of glucose to sorbitol (99.5 selectivity at 99.7% conversion under the condition of 373 K, 8 MPa H2), according to research of Besson et al 105 Lin et al 106 Zhao et al 107 presented that Ru nanoparticles containing carbon microfibers showed higher activity in glucose hydrogenation than Ru supported on multi-walled carbon nanotubes, alumina microfibers and active carbon. The high activity and stability of this catalyst was attributed to the high degree of Ru dispersion, appropriate particle Ru size and high crystallinity.…”

Carbon supported Ru clusters prepared by pyrolysis of Ru precursor-impregnated biopolymer fibers

“…[1,2,3,4,5,6,7,8] However, the production of nanostructured carbon supports often requires a number of preparation steps, such as template impregnation, pyrolysis and / or template removal procedures, including the usage of aggressive chemicals (e.g. Pd/Ru particles) has been of scientific interest since decades.…”