Dehydrogenation of cyclohexanol on Cu–ZnO/SiO2 catalysts: The role of copper species

Complexation effect of copper(ii) with HEDP supported by activated carbon and influence on acetylene hydration

The effect of copper(ii) complexation with HEDP on an AC support was evaluated for acetylene hydration.

Enhanced Ethylene Glycol Selectivity of CuO-La2O3/ZrO2 Catalyst: The Role of Calcination Temperatures

The CuO-La₂O₃/ZrO₂ catalysts calcined at different temperatures from 500 to 800 °C were studied for the hydrogenation of oxalates to ethylene glycol (EG). Along with the increase of calcination temperatures, the BET surface area, pore volume, and Cu dispersion decreased, whereas the crystallite sizes of Cu species increased. Interestingly, the superior performance such as a 98% selectivity of EG in dimethyl oxalate hydrogenation or a 96.5% selectivity of EG in diethyl oxalate hydrogenation was obtained over the catalyst calcined at 700 °C. Essentially, the surface synergism between Cu species and monoclinic ZrO₂ was enhanced by the higher calcination temperature, resulting in the remarkable surface adsorption and activation of H₂. Besides, the increase of calcination temperature significantly reduced the surface acidity and basicity, which could effectively suppress the byproduct formation.

Self-tuned properties of CuZnO catalysts for hydroxymethylfurfural hydrodeoxygenation towards dimethylfuran production

CuZnO is used as robust, efficient and self-tuned catalyst for the conversion of 5-hydroxymethylfurfural (5-HMF) into 2,5-dimethylfuran (DMF) or 2,5-bishydroxymethylfuran (BHMF) depending on the preparation method and the reaction environment.

Ti-SBA-15 supported Cu–MgO catalyst for synthesis of isobutyraldehyde from methanol and ethanol

A IBA yield of 32.7% was achieved at 360 °C on 20C6.5MTS-400 using methanol and ethanol as reactants. The catalyst activity was strongly affected by Cu content on the surface, the interaction of Cu and Mg species, the basicity of the catalysts, etc.

Excellent performance in hydrogenation of esters over Cu/ZrO2 catalyst prepared by bio-derived salicylic acid

A variety of bio-derived organic carboxylic acids are used to prepare Cu/ZrO₂. In particular, salicylic acid provides superb control over the distribution of small Cu particles on t-ZrO₂, which affords enhanced catalytic activity.

Efficient photocatalytic oxidation of benzene to phenol by metal complex-clay/TiO2 hybrid photocatalyst

Synthetic saponite containing a photosensitizing metal complex was complexed with colloidal anatase and used for the visible light photocatalytic reaction of aqueous benzene to phenol.