Activated layered manganese oxides with deposited nano-sized gold or silver as an efficient catalyst for epoxidation of olefins

Applications of the “nano to bulk” Mn oxides: Mn oxide as a Swiss army knife

“…Compared with a nanolayered Mn oxide phase without any Ag or Au particles, the catalytic activity of the Au/Mn oxide and Ag/Mn oxide is better. Thus a few Ag or Au atoms present within the layered Mn oxides seem to have a significant effect on the catalytic activities of these compounds toward the epoxidation of olefins [78]. Interestingly, high (> 2%) amounts of Au or Ag had little effect on the epoxidation of olefins.…”

Catalytic use of layered materials for fine chemical syntheses

“…For instance, layered manganese oxides with deposited gold or silver nanoparticles were successfully employed as reusable catalysts in epoxidations of a variety of olefins (Scheme 23). 107 Palladium supported on layered niobium oxide (KNb 3 O and HNb 3 O 8 ) was reported to efficiently catalyse the one-pot deacetalization/hydrogenation reaction of benzaldehyde dimethyl acetal to benzyl alcohol. 108 It was revealed that both steps were strongly dependent not only on the presence of the catalytic metal but also on the acid strength of the catalyst.…”

“…103a,c,104 Scheme 23 Epoxidation of olefins catalysed by gold or silver nanoparticles deposited on layered manganese oxides. 107…”

Ultrasound‐Mediated Synthesis of Novel α‐Aminophosphonates Using Graphene Nanosheets‐Silver Nanoparticles (GNS‐AgNPs) as a Recyclable Heterogeneous Catalyst

“…Silver and its nanoparticles with controlled size and shape acts as an impressive catalyst for various chemical transformations. It has been employed as catalyst in many reactions such as cycloaddition, epoxidation, catalytic reduction, and coupling reactions . Ag nanoparticles have been immobilized on various carbon‐based supports such as CNTs, graphene, graphene oxide (GO) and used for electrochemical and antibacterial applications ,…”