13  Iron, cobalt and nickel

Fe3O4 Nanoparticles Anchored on Carbon Serve the Dual Role of Catalyst and Magnetically Recoverable Entity in the Aerobic Oxidation of Alcohols

“…The advantages of ready availability, low cost, and low toxicity make iron an ideal metal for catalysis . It is well known that iron takes part in many biological systems, for example, in metalloproteins for the transportation of oxygen . Imitating such processes, many efficient homogeneous iron catalysts have been developing for catalyzing cross‐coupling reactions, sulfide oxidations, allylic alkylations and aminations, alcohol oxidations and Michael additions, etc .…”

“…[1][2][3][4][5] It is well known that iron takes part in many biological systems, for example, in metalloproteins for the transportation of oxygen. [6,7] Imitating such processes,m any efficient homogeneous iron catalysts have been developing for catalyzing cross-coupling reactions, sulfide oxidations, allylic alkylationsand aminations, alcohol oxidations and Michael additions, etc. [8][9][10][11] Oned esirable characteristic is that most of these iron-based homogeneous catalysts are suitable for workingu nder relativelym ild conditions, that is, low temperature and ambient pressure.…”

Aerobic oxidative coupling of alcohols and amines to imines over iron catalysts supported on mesoporous carbon

“…Among various metal oxides, iron oxides have the advantages of ready availability, low cost, and low toxicity [28][29][30][31][32]. However, iron oxides show low activities in the oxidative coupling of alcohols and amines to imines [25].…”