Catalytic methane decomposition is believed to be an economic and environmental friendly route for the production of COx free hydrogen high quality carbon nanotubes. However, development active stable catalysts remains a significantly challenging research topic. This study focuses on highly silica-supported Fe-based thermal into A series Fe/SiO2 with varying Fe loading in range between 25 wt% 1...

A flow trough type catalytic reactor system was adequately modified for NO related catalytic and adsorption measurements, including the on-line connection of a digital chemiluminescent NO-NOx analyzer to the reactor outlet system. Moreover, we have largely completed the installation of an FTIR coupled catalytic system containing a HTEC cell for high temperature DRIFT studies. Three different ba...

Focusing on the steric and electronic properties of the resonance-stabilized amidine framework, a cationic metal-bisamidine complex was designed as a conjugated combined Lewis-Brønsted acid catalyst. The chiral Zn(II)-bisamidine catalyst prepared from the 2,2'-bipyridyl derived bisamidine ligand, ZnCl₂, and AgSbF₆ promoted asymmetric Mukaiyama aldol reaction of α-ketoester and α,α-disubstituted...

Selective transformation of BHMF (2,5-bis(hydroxymethyl)furan) to THFDM (tetrahydrofuran-2,5-dimethanol) over a variety structured Ni/Sx-Z1-x catalysts was investigated. The effects support, Ni loading, solvent, temperature, pressure, and particle size on the conversion selectivity were studied. Among them, 10 wt% catalyst supported SiO2:ZrO2 weight ratio 90:10 (10NiS90Z10) exhibits best perfor...

A mild and green method has been developed for the preparation of coumarins derivatives through the one-pot reactions. In our study,various phenols and ethyl acetoacetate compound in which we used silica-supported boron sulfonic acid [SiO2/B(SO4H)3] as a new, highly efficient and tri-functional inorganic Brønsted acid catalyst were processed under solvent-free condition and thermal. The catalys...

The ring opening reactions of 1,2and 1,3-dimethylcyclohexane (1,2and 1,3-DMCH) have been investigated over Ir catalysts supported on Al2O3, SiO2, and TiO2. These two naphthenic molecules are used as probe reactants to investigate the different reaction paths that may occur in the treatment of diesel fuels and gasolines for the improvement of cetane numbers (CNs) and octane numbers. The CN can b...

A ligand and base-free copper catalyzed synthetic method for the efficient ?-arylation of aromatic ketones is described. In order to avoid strong bases, ketone-derived silyl enol ethers were employed. Their reaction with diaryliodonium salts as aryl source provided intermolecular C–C coupling displaying good functional group tolerance requiring low catalyst loading.

the use of a recyclable phase transfer catalyst, sio2-peg-imbr, is demonstrated in a simple and highly efficient synthesis of phenacyl derivatives by nucleophilic substitution reaction of phenacyl halides with different anions in water. advantages of this system are easy work-up, moderate to good yields, and recyclable catalyst. the catalyst can be recycled and reused several times with no loss...

A triethylaluminium(TEAl)-modified Phillips ethylene polymerisation Cr/Ti/SiO2 catalyst has been developed with two distinct active regions positioned respectively in the inner core and outer shell of the catalyst particle. DRIFTS, EPR, UV-Vis-NIR DRS, STXM, SEM-EDX and GPC-IR studies revealed that the catalyst produces simultaneously two different polymers, i.e., low molecular weight linear-ch...

Magnetic C-C@Fe3O4 hollow microspheres were prepared by using aerosol-based Fe3O4@C-SiO2 core-shell particles as templates. The magnetic double-shelled microspheres efficiently worked as carriers to load Pt nanoparticles, thus making the catalyst recyclable and reusable.