Ruthenium nanoparticles loaded on functionalized graphene for liquid-phase hydrogenation of fine chemicals: Comparison with carbon nanotube

Graphene-Based Metal/Acid Bifunctional Catalyst for the Conversion of Levulinic Acid to γ-Valerolactone

“…Ru/rGO performed with higher activity than many other reported catalysts did at relatively low temperature, and the main product was HVA; Ru/rGO-S improved the selectivity to GVL due to acceleration of the dehydration process by SO 3 H, which hardly influenced the hydrogenation activity of Ru. We previously found the superiority of graphene as a support for Ru or Pt nanocatalysts on benzene or cinnamaldehyde hydrogenation relative to that on carbon nanotubes (CNTs) and activated carbon (AC) through modulation on the electronic or geometric structures of metal NPs or the enhanced adsorption of substrates and elimination of diffusion resistance, and this work again validated its advantage in such the heterogeneous catalytic reaction. Furthermore, it illuminated that the two-dimensional graphitic structure of graphene could allow one to construct various organic–inorganic hybrid nanocomposites through the combination of covalent chemistry and nanotechnology.…”

“…), the organic solvents or surfactants are essential to keep the reduced metal particles in nanoscale. Here, we adopted H 2 as weak reductant and GO itself as stabilizer to form Ru NPs in aqueous solution, and the GO can be simultaneously reduced probably due to the combined effect of thermal reduction ,− and hydrogen spillover. , …”

Mechanism of Ionic Impedance Growth for Palladium-Containing CNT Electrodes in Lithium-Oxygen Battery Electrodes and Its Contribution to Battery Failure

“…Several metal and metal-oxide catalysts have been used in and as cathodes of Li-O 2 batteries in order to improve the catalytic properties of the OER and ORR [25][26][27][28][29]. Some of the elements used have been platinum [30], palladium [31], ruthenium [26,27,[32][33][34][35], gold [30,36], and various metal oxides [37][38][39]. The presence of a catalyst destabilizes the oxidizing species, which results in decreased charging overpotential in Li-O 2 batteries [40][41][42].…”

Role of surface defects of carbon nanotubes on catalytic performance of barium promoted ruthenium catalyst for ammonia synthesis

“…Refluxing the CNTs in boiling nitric acid is one of the most commonly reported methods for introducing a larger number of oxygen-containing surface functional groups (SFGs), which are beneficial for the dispersion of supported metal NPs [15,16] . However, even if it has been demonstrated since many years that oxygen-containing SFGs play a crucial role in carbon supports and can affect dispersion or sintering of the metal particles, it is still a matter of debate whether they also function as anchoring sites for NPs especially for ruthenium based ammonia synthesis catalysts been operated at temperature range of 40 0-50 0 °C, at which temperature range, most of the SFGs have already been decomposed [17][18][19] .…”