Selective hydrogenation of NITROCYCLOHEXANE (cas 1122-60-7) to cyclohexanone oxime by alumina-supported gold cluster catalysts

Add time:09/28/2019    Source:sciencedirect.com

Metal oxides (Al2O3, SiO2, MgO)-supported Au cluster catalysts prepared by colloid deposition method and well established Au/TiO2 prepared by deposition–precipitation method were tested for the selective reduction of NITROCYCLOHEXANE (cas 1122-60-7) into cyclohexanone oxime. The activity and selectivity depended strongly on the size of Au and support material. Au/Al2O3 with smaller Au particle size (2.5 nm) was the most effective catalyst, exhibiting a high cyclohexanone oxime yield (86%) under mild condition (0.6 MPa H2, 100 °C). To study the origin of support and size effects, in situ FTIR experiments for OH/D2 exchange reaction and nitrobenzene adsorption combined with poisoning experiments using pyridine and acetic acid were carried out. It is suggested that cooperation of coordinatively unsaturated Au atoms and the acid–base pair site (Alδ+–Oδ− site) plays an important role in H2 dissociation step. Alδ+–Oδ− site also acts as the adsorption site of the nitro group.

We also recommend Trading Suppliers and Manufacturers of NITROCYCLOHEXANE (cas 1122-60-7). Pls Click Website Link as below: cas 1122-60-7 suppliers

Prev:Selective hydrogenation of NITROCYCLOHEXANE (cas 1122-60-7) to cyclohexanone oxime with H2 on decorated Pt nanoparticles
Next:Synthesis of polyhydroxylated α-NITROCYCLOHEXANE (cas 1122-60-7) carboxylic acids derived from d-glucose: a striking case of racemization)