In this paper, we studied an efficient protocol of reductive carbonylation two aryl iodides, namely 2-iodo-5-ethylthiofene and 5-iodobenzo[d][1,3] dioxole, employing formic acid, propylphosphonic anhydride (T3P) a base, to afford aldehydes used as such industrial flavors/fragrances or key intermediates for some APIs other fragrances. Our approach, comparing the previously described [1], not onl...

A Pd/α-Al2O3 nanocatalyst with ultra-low Pd loading exhibits high activity and stability for CO oxidative coupling to dimethyl oxalate, which was prepared by a Cu(2+)-assisted in situ reduction method at room temperature. The small size and high dispersion of Pd nanoparticles facilitated by Cu(2+) ions are responsible for the excellent catalytic activity.

The aromatic rings of polystyrene (PS) were hydrogenated in decahydronaphthalene (DHN) expanded with supercritical carbon dioxide (scCO2). Conducting the hydrogenation in scCO2-DHN offers the benefits of improved transport properties, specifically lower solution viscosity and a higher PS diffusion coefficient. Various Pd catalysts are effective for hydrogenating the aromatic rings of PS at temp...

The migration metallic species between Al2O3 and CeO2-ZrO2 (CZ) is one of the main causes for deactiviation three-way catalysts (TWCs). In order to address this issue, κappa-phase κ-Ce2Zr2O8 was constructed strengthen Pd-CZ interaction thus stabilize palladium species. For comparison, tetragonal-phase Ce0.5Zr0.5O2 with phase (κCZ) without (tCZ) were prepared. (κCZ+Al2O3) supported catalyst (Pd/...

Hydrogenation of benzoic acid using monoand bimetallic catalyst of Ru, Pd, Co, and Re yielded different products. It was observed that 5% Ru/C was an active catalyst for hydrogenation of both aromatic ring and carboxylic group, while Pd/C catalyst hydrogenated only aromatic ring. Ru-Sn/Al2O3 is a chemoselective catalyst for hydrogenation of –COOH group of benzoic acid.

Catalytic combustion of propane as typical light alkanes was important for the purification industrial VOCs and automobile hydrocarbon emissions. Si-doped Al2O3 nanosheet synthesized by a hydrothermal method, effects Si content on morphology thermal stability were investigated. The doping SiO2 could tune thickness nanosheets significantly improve its stability, ? phase still maintained, specifi...

Renewable methanol, obtained from CO2 and hydrogen provided renewable energy, was proposed to close the loop. In industry, methanol synthesis using catalyst CuO/ZnO/Al2O3 occurs at a high pressure. We intend make certain modification on traditional work lower pressure, maintaining selectivity. Therefore, three heterogeneous catalysts were synthesized by coprecipitation improve activity selectiv...

By combining scanning transmission electron microscopy, CO chemisorption, and energy dispersive X-ray spectroscopy with NO oxidation light-off measurements we investigated deactivation phenomena of Pt/Al2O3, Pd/Al2O3, Pt-Pd/Al2O3 model diesel catalysts during stepwise hydrothermal aging. Aging induces significant particle sintering that results in a decline the catalytic activity for all cataly...

In this work we report the application of a recently developed experimental protocol using Pulsed Field Gradient (PFG) Nuclear Magnetic Resonance (NMR) techniques to simultaneously assess bulk pore and surface diffusion coefficients in liquid saturated porous catalysts. This method has been developed to study solvent effects on the diffusion of methyl ethyl ketone (MEK) in mesoporous 1 wt% Pd/A...