Effect of Rhenium on Ruthenium Dispersion in the Ru–Re/γ-Al2O3 Catalysts

Hydrogenation of succinic acid to 1,4-butanediol over Re–Ru bimetallic catalysts supported on mesoporous carbon

“…Thus, H 2 -TPD measurements were carried out to explain the affinity of metal species toward hydrogen in the reduced (0.6 − x)Re-xRu/MC (x = 0, 0.15, 0.3, 0.45, and 0.6) catalysts. In this study, hydrogen was injected to the reduced catalysts at 200 • C, which was identical to the reaction temperature, to thermally activate the dissociative adsorption of hydrogen molecules on metallic rhenium and ruthenium [21,22,44]. spillover hydrogen on carbon surface, as evidenced by the TPR results [32,33,45].…”

Bimetallic Ru-Re/γ-Al2O3 catalysts for the catalytic combustion of propane: Effect of the Re addition

“…Recently, we have studied the effect of rhenium on ruthenium dispersion in the Ru-Re/␥-Al 2 O 3 catalysts [20]. It was found that in the chlorine-free bimetallic Ru-Re catalysts, dispersion of ruthenium increased with the rise of the Re loading.…”

Microwave Assisted Polyol Synthesis of the Bimetallic RuRe Nanoparticles Deposited on γ-Alumina and their Application for the Light Alkane Oxidation

“…X-ray diffraction (XRD) patterns of the catalysts were measured on a PANanalytical X'Pert PRO diffractometer using CuKa radiation (k = 0.15406 nm). The metal dispersion was determined by hydrogen chemisorption performed on a standard Pyrex glass apparatus according to procedures given in [17]. The textural properties of the nano-catalysts were determined by N 2 adsorption-desorption isotherms at liquid nitrogen temperature by using Micromeritics ASAP 2020 C apparatus.…”

“…ions are easily reduced to Ru Top Catal metal, as compared with Re 7? ions [17]. If both Ru and Re precursors are added to the EG solution before heating in the autoclave with a MW-heating, Ru ions are first reduced at lower temperature forming Ru(0) nanoparticles, which may then catalyse the reduction of Re species leading probably to formation of bimetallic NPs containing Ru mostly at the core and excess rhenium on the surface of nanoparticle.…”

“…SAED patterns and XRD patterns (not shown) presented only lines corresponding to the alumina support evidencing small size of the metal NPs. Combination of Re and Ru metal in one formulation of the catalyst causes difficulty in structural characterization since both metal species can interact in all range of chemical composition due to their similar crystal structure, atom radius, and electronegativity [15,17]. Also, the majority of metal NPs was too small to exhibit lattice fringes or visible diffraction patterns.…”