Surface interactions with the metal oxide surface control Ru nanoparticle formation and catalytic performance

Novel Approach of Reusing the Precious Ru in the Wastewater Derived from the Depolymerization of Lignite to Prepare Ru–AC Catalysts Doped with Nb2O5

“…As shown in Figure S4 (pyridine-FTIR spectra of 7.3Nb-500AC), the band around 1446 cm –1 can be assigned to Lewis acid sites (LAS), while the 1541 cm –1 band was attributed to Brønsted acid sites (BAS). The band at 1486 cm –1 is responsible for both LAS and BAS . The LAS and BAS in carriers might come from low-coordinated Nb sites in the tetrahedral coordination and M–OH (M: Si, Nb), respectively. , All the recorded spectra showed the typical band pattern of LAS and BAS like 7.3Nb-500AC.…”

“…The band at 1486 cm −1 is responsible for both LAS and BAS. 45 The LAS and BAS in carriers might come from low-coordinated Nb sites in the tetrahedral coordination and M−OH (M: Si, Nb), respectively. 46,47 All the recorded spectra showed the typical band pattern of LAS and BAS like 7.3Nb-500AC.…”

Efficient and labor-saving Ru/C catalysts for the transformation of levulinic acid into γ-valerolactone under mild reaction conditions

“…Although TPD data of the Ru/C catalysts could have been considered suitable to extract information about the surface chemistry of the catalysts, metallic Ru exerts a catalytic effect on the decomposition of some surface oxygen functional groups 31,50,51 and, thus, this affects the CO 2 and CO evolution profiles (qualitative and quantitatively). Fig.…”

Ru Catalysts Supported on Commercial and Biomass-Derived Activated Carbons for the Transformation of Levulinic Acid into γ-Valerolactone under Mild Conditions

“…The reduced catalysts have been also characterized by TPD experiments. As mentioned above, the TPD profiles of the reduced catalysts are significantly different from those of the pristine supports (Table S1 and Figure S1) as a consequence of modifications of the OFG associated with the impregnation step and the influence of the presence of metallic Ru in their thermal decomposition [40,41]. The amounts of generated CO 2 and CO, products of the OFG decomposition, are higher for the reduced catalysts than for the supports and reflects that with the aid of the Ru nanoparticles more OFG can be decomposed in the temperature interval used in the TPD experiments.…”