Switching of reactions between hydrogenation and epoxidation of propene over Au/Ti-based oxides in the presence of H2 and O2

Selective Hydrogenation of Cinnamaldehyde Catalyzed by ZnO-Fe2O3 Mixed Oxide Supported Gold Nanocatalysts

“…The higher selective hydrogenation activity of Au/Zn 0.7 Fe 0.3 O x than those of its counterparts suggests that smaller Au particles favor higher hydrogenation catalytic activity. This observation is in line with the well-known phenomenon that the catalytic property is tightly related to the size of Au particles and type of support materials [43][44][45][46]. It is widely accepted that the hydrogenation activity of gold nanocatalysts is mainly determined by the step of H 2 dissociation.…”

Tailored Nanoparticles for Clean Technology–Achieving Size and Shape Control

“…The interplay of experimental conditions and catalytic activity toward epoxidation or hydrogenation was reported [181], along with the identification of the most active species [180]. There is a clear size effect in Au nanoparticle performance in this reaction.…”

“…Starting from 2004, the group of Haruta [162,[177][178][179][180][181][182] published a series of papers on gas-phase epoxidation of propene by Au-nanoparticle-based catalysts, which culminated in a patent application in 2010. The interplay of experimental conditions and catalytic activity toward epoxidation or hydrogenation was reported [181], along with the identification of the most active species [180].…”

Monometallic Supported Gold Catalysts in Organic Transformations: Ring Making and Ring Breaking

“…Haruta's group remained a major player in this area [6][7][8][9][10]. In the epoxidation reaction they have used Au/Ti-MCM-41 and Au/TiO 2 -SiO 2 catalysts with various Ti/Si molar ratios (0.25/100-6.0/100) [6].…”

“…It has been observed that in a H 2 -O 2 mixture, the reaction of propene could be switched between hydrogenation and epoxidation over Au/Ti-based oxides [10] (Figure 1). Reaction pathways were strongly dependent on the size of Au particles and on the presence of alkalis.…”