Combustion activities of the Ru catalysts supported on hexagonal YbFeO3

Abstract

Hexagonal YbFeO 3 (h-YbFeO 3 ) were prepared by solvothermal and Pechini methods. Although the morphology of h-YbFeO 3 synthesized by solvothermal method was hexagonal plate, h-YbFeO 3 synthesized by the Pechini method was composed of large aggregates of irregularly-shaped fine particles. Activities of Ru catalysts supported on h-YbFeO 3 for combustion reaction of propane or propene were investigated. For the support of the Ru catalyst, h-YbFeO 3 synthesized by the solvothermal method was superior to that prepared by the Pechini method. Effects of the reaction temperatures of the solvothermal synthesis upon the activities of the Ru catalysts supported on the products were examined and it was found that the catalyst supported on crystallized h-YbFeO 3 showed higher activity than the catalyst supported on an amorphous product having a large surface area.

Light Cycle Oil Source for Hydrogen Production through Autothermal Reforming using Ruthenium doped Perovskite Catalysts

“…From Figure 4c, the normalized Ru K-edge XANES spectra of LaCo 0.85 Ru 0.15 O 3 and LaCr 0.85 Ru 0.15 O 3 catalysts showed a similar shape of the major peaks. The first thing to explore is the presence of the pre-edge peak, which usually indicates the local structure of Ru [42][43][44][45][46]. For both perovskites, there were no pre-edge peak, which conveyed a strongly stabilized local symmetry of Ru, like as the nearly regular octahedral symmetry at the orthorhombic lattice of the Cr based perovskite.…”

“…Both perovskites show shifts to a higher energy from the increased intensity of the position at 22,135 eV, and further increased at the Ru in Cr based perovskite was seen. The peak positions in these major edge regions are assigned to the dipole transition of 1s→5p, which can be translated to Ru (4+δ)+ species [42][43][44]. As the higher activated charge of Ru principally contributes to the increase in the transition energy, the further shift of the energy region for LaCr 0.85 Ru 0.15 O 3 catalyst indicates in relatively higher portion of Ru (4+δ)+ at the doped perovskite structure, which may be able to display a relatively higher activity than the LaCo 0.85 Ru 0.15 O 3 catalyst under the LCO-ATR reaction conditions.…”