Catalytic dehydrogenation of ethanol produces acetaldehyde, an important precursor for several value-added chemicals such as acetic acid and acetate esters. In this paper, we demonstrate that Zn-containing MFI zeolites are highly active selective catalysts process. Furthermore, show their activity selectivity depend on the chemical composition preparation catalysts. The best catalyst comprises ...

Herein, we describe a practical protocol for the removal of alcohol functional groups through reductive cleavage their benzoate ester analogs. This transformation requires strong single electron transfer (SET) reductant and means to accelerate slow fragmentation following substrate reduction. To accomplish this, developed photocatalytic system that generates potent from formate salts alongside ...

A true Brønsted analysis of proton transfer in an enzyme mechanism is made possible by the chemical rescue of an inactive mutant of aspartate aminotransferase, where the endogenous general base, Lys258, is replaced with Ala by site-directed mutagenesis. Catalytic activity is restored to this inactive mutant by exogenous amines. The eleven amines studied generate a Brønsted correlation with beta...

Esters reduce to form ethers and alcohols on contact with metal nanoparticles supported Brønsted acidic faujasite (M-FAU) that cleave C−O bonds by hydrogenation hydrogenolysis pathways. Rates selectivities for each pathway depend the identity (M=Co, Ni, Cu, Ru, Rh, Pd, Pt). Pt-FAU gives propyl acetate consumption rates up 100 times greater than other M-FAU catalysts provides an ethyl ether sele...

Periodic DFT calculations were performed on H-FER models having Si/Al ratios of 71 : 1, 35 : 1 and 8 : 1, in order to investigate the effect of aluminium content on the properties of the zeolite Brønsted acid sites. Relative stability of these sites was found to be dependent on Si/Al ratio, which is the main factor dictating the relative concentration of Brønsted acid sites having different typ...

Novel synergistic effects between Lewis and Brønsted acids in Prins cyclization are reported. Non-reactive Lewis acids and non-reactive Brønsted acids, which failed to perform Prins cyclization when used alone, have shown remarkable synergistic effects when used in combination to perform the reaction successfully.

Tungstated zirconia (WO3/ZrO2) is one of the most well-studied solid acid catalyst systems and continues to attract the attention of both academia and industry. Understanding and controlling the properties of WO3/ZrO2 catalysts has been a topic of considerable interest over almost the past three decades, with a particular focus on discovering the relationship between catalytic activity and the ...