Ni, Mo-containing catalysts for the single-step synthesis of propylene from ethylene: the effect of the support nature

Polyfunctional Ni, Mo-containing catalysts were synthesized by sequential impregnation of the support (SiO2, Al2O3, B2O3-Al2O3, SO42–/Al2O3,SO42–/ZrO2) with solutions of the corresponding salts with intermediate drying at 120 °C and calcination at 500–550 °C. Physicochemical properties of the synthesized catalysts were studied by XRD, H2-TPR, UV-vis spectroscopy and EPR; the catalysts were tested in the singlestep synthesis of propylene from ethylene at atmospheric pressure, temperature 200 °С, and ethylene mass flow rate 0.5 h–1. The maximum values of ethylene conversion and propylene yield were observed for the sample synthesized from borate-containing alumina; this is related to the formation of active sites of ethylene dimerization – the Ni2+ cations bound to acid sites of the support, and active sites of metathesis – the surface monomolybdate compounds.

Ethanol–ethylene conversion mechanism on hydrogen boride sheets probed by in situ infrared absorption spectroscopy

The catalytic ethanol dehydration process on hydrogen boride (HB) sheets are found to involve the hydrogen atoms of the HB sheets.

Metal–organic framework derived copper catalysts for CO2 to ethylene conversion

MOF-derived copper catalysts underwent a surface reconstruction to form a Cu@CuxO core@shell structure during CO2RR process, which was beneficial for CO2 to C2H4 conversion, resulting in a 51% FE for C2H4 and 70% FE for C2+ products.

In vivo and in vitro protein mediated synthesis of palladium nanoparticles for hydrogenation reactions

We report the biosynthesis of size confined palladium nanoparticles (Pd-NPs) in bacteria that can be utilized for acetylene to ethylene conversion while maintaining viability.