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A new series of photocatalysts, In 0.8 M 0.2 TaO 4 (M = Ni, Cu, Fe), were synthesized by a solid-state reaction and characterized by powder X-ray diffraction and Rietveld structure refinement. No apparent structural variation has been recognized with the change of doping atoms. However, the rate...
The rate of reaction of propane over a Ru/Al 2 O 3 catalyst was determined as a function of the partial pressures of the reactants, C 3 H 8 and CO 2 at 600 and 650°C. The order of the reaction was found to be fractional with respect to carbon dioxide, indicating its involvement in the...
The promotion of Ag/γ-Al 2 O 3 by adding alkali metals (Li, Na, K, Cs) for selective catalytic reduction of NO with C 3 H 6 was studied in this work. The activity of NO reduction was enhanced by addition of Cs to Ag/γ-Al 2 O 3 in the presence of excess oxygen and SO 2 . The stability and growth...
A novel chemisorption method was employed for the dissociative adsorption of methanol to surface methoxy intermediates in order to quantitatively determine the number of surface active sites on one-component metal oxide catalysts (MgO, CaO, SrO, BaO, Y 2 O 3 , La 2 O 3 , CeO 2 , TiO 2 , ZrO 2 ,...
A new CrCoAPO-5 was synthesized under hydrothermal conditions, characterised by X-ray diffraction, scanning electron microscopy, infrared spectroscopy, energy dispersive X-ray analysis, thermogravimetric analysis, electron paramagnetic resonance and nitrogen physisorption. The CrCoAPO-5 showed...
A mild and efficient preparation of 1,3-dioxolanes from epoxides and acetone has been carried out in high to excellent yields under catalysis of potassium dodecatungstocobaltate trihydrate (K 5 CoW 12 O 40 ⋅3H 2 O) (0.01 molar equiv.).
Transition-metal-exchanged zeolite Y (Cr, Mn, Fe, Co, Ni, Cu, Zn) are compared as catalysts for the aziridination of styrene using ( N -( p -tolylsulfonyl)imino)phenyliodinane (PhI=NTs) as the nitrene precursor. The Cu-exchanged zeolite shows high levels of aziridine formation, but significant...
This paper describes a grafting technique that we developed for preparing highly dispersed Cs-tungstophosphoric acid (Cs-TPA) salt on a mesoporous silica carrier (MCM-41) using alcohols as solvents during impregnation. It is shown that this procedure leads to a novel class of catalysts with high...
An isotopic transient technique and XPS were used to investigate the mechanism of partial oxidation of CH 4 to syngas over a Ni/Al 2 O 3 catalyst at atmospheric pressure and 700°C. The experimental results show that CH 4 can decompose easily and quickly to H 2 and Ni x C over the reduced...
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