Now showing items 31-40 of 70
Characterization of HDS/HDN active sites in cluster-derived and conventionally-prepared sulfide catalysts
(Elsevier, 1994-08-30)
The catalytic and sorptive properties of a series of sulfide cluster-derived catalysts were compared to those of an analogous series of conventionally-prepared sulfides. The cluster-derived and conventionally-prepared ...
The use of sulfide cluster-derived catalysts to understand the promotional effect in hydrotreatment catalysis
(John Wiley & Sons Ltd., 1992-09)
Sulfide cluster-derived ensembles are promising models of the active sites in commercial hydrotreatment catalysts. A series of sulfide clusters were adsorbed intact onto high-surface-area Γ-alumina, magnesium oxide and ...
Molybdena on titania : I. Preparation and characterization by Raman and Fourier Transform Infrared spectroscopy
(Elsevier, 1985-04)
Titania-supported molybdenum and cobalt-molybdenum catalysts were prepared by the dry impregnation and equilibrium adsorption techniques. Raman and Fourier Transform Infrared spectroscopy were used to follow the changes ...
Electron microdiffraction study of bimetallic Ru---Au/MgO catalysts
(Elsevier, 1986-08)
A microdiffraction study of bimetallic Ru---Au/MgO catalysts is carried out in order to discriminate between the random adsorption versus atomic ordering model proposed for the structure of bimetallic clusters. The ...
Neopentane reactions over bimetallic Pt---Sn/AI2O3 and Pt---Au/SiO2 catalysts
(Elsevier, 1991-12)
The reaction of 2,2-dimethylpropane (neopentane) with hydrogen was studied over two series of supported bimetallic catalysts containing platinum as the primary group VIII metal and either gold or tin as the second metallic ...
The microstructure of bimetallic Ru---Cu/SiO2 catalysts: A chemisorption and analytical electron microscopy study
(Elsevier, 1986-08)
Supported bimetallic Ru---Cu/SiO2 catalysts are characterized by transmission electron microscopy, energy dispersive X-ray spectroscopy, electron microdiffraction, and chemisorption. Metal particles up to 4 nm in diameter ...
Microstructure of a Pd/ceria–zirconia catalyst after high-temperature aging
(Kluwer Academic Publishers-Plenum Publishers; Kluwer Academic Publishers ; Springer Science+Business Media, 1998-03)
A model automotive exhaust catalyst, consisting of 2.25 wt% Pd supported on initially high-surface-area (88 m 2 /g) cerium–zirconium mixed oxide (Ce 0.5 Zr 0.5 O 2 ), was studied by X-ray diffraction (XRD), thermogravimetric ...
Bimetallic Ru-Au catalysts: Effect of the support
(Elsevier, 1981-06)
Ru-Au catalysts supported on SiO2 were characterized by using H2 and O2 chemisorption, wide-angle X-ray scattering, diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. Catalytic activity was measured ...