Selective aerobic oxidative dehydrogenation of alcohols and amines catalyzed by a supported molybdenum-vanadium heteropolyanion salt Na5PMo2V2O40

Au–Pd/AC as catalysts for alcohol oxidation: Effect of reaction parameters on catalytic activity and selectivity

“…Under the basic conditions we observed a general increasing of the activities of all bimetallic catalysts. However, considering the per cent increment we observed the highest effect for gold rich composition (46% for Au 90 -Pd 10 base on the activity, also the selectivity to benzaldehyde and benzoic acid appeared strongly dependent on the Au/Pd ratio, the higher the gold content the more important the overoxidation of benzaldehyde appeared.…”

“…The TOF data for reactions done without and with NaOH showed a "volcano behaviour" with Au 60 -Pd 40 catalyst resulting as the most active catalyst in the absence of NaOH and Au 80 -Pd 20 in the presence of NaOH (TOF of 660 h -1 and 2577 h -1 respectively) ( Figure 5). The trend of the activity data highlighted a slight difference for the bimetallic catalyst in the range of composition Au 90 -Pd 10 and Au 60 -Pd 40 . However, the effect of the added base on the activity was extraordinary for Au 90 -Pd 10 (about 370% of increasing) decreasing in the case of the more rich Pd composition ( Figure 5).…”

“…The advantage of using such oxidants lies in the formation of water as the sole co-product and the low cost of the oxygen/air. Different catalysts (homogeneous and heterogeneous) have been investigated in the alcohol oxidation using molecular oxygen or hydrogen peroxide in the liquid phase [4][5][6][7][8][9][10][11][12][13][14][15].…”

Oxidation of Alcohols with Molecular Oxygen

“…A mixed-addenda heteropolyanion salt Na 5 PV 2 Mo 10 O 40 was immobilized by simple impregnation onto carbon [204]. The catalyst oxidized aromatic alcohols to aldehydes and ketones with good yields, without further oxidation to carboxylic acids.…”

A water soluble heteropolyoxotungstate as a selective, efficient and environment friendly oxidation catalyst

“…[13][14][15][16][17][18][19][20] As catalyst recovery is an important consideration for any practical catalytic process, many different methodologies have been used for this purpose, e.g. immobilization of the catalyst onto a solid support, [21][22][23][24][25] inclusion of the catalyst in a solvent anchored supported liquid phase, [26][27][28] and the use of a biphasic (aqueousnonaqueous) liquid medium with or without a phase transfer catalyst. [29][30][31] Of these, for reasons already mentioned, the last method is especially attractive.…”