Selective oxidation of glucose to gluconic acid over Pd–Te supported catalysts

Exceptional performance of bimetallic Pt1Cu3/TiO2 nanocatalysts for oxidation of gluconic acid and glucose with O2 to glucaric acid

“…In previous work, oxidation of glucose to gluconic acid has been investigated using supported Pt, Pd, and Au catalysts [8,[11][12][13] or their combinations, such as PtPd, PdAu, PtPdBi, PtAu, PtBi, and PdTe [14][15][16][17][18][19][20][21][22][23][24][25]. Although reasonable oxidation activity (TOF = 48-1423 h À1 based on surface metal composition, 45-70°C) was achieved, reported glucose to glucaric acid yields are very low (Y $ 3%).…”

Influence of gold particle size in Au/C catalysts for base-free oxidation of glucose

“…Industrially D-Gluconic acid is produced by enzymatic fermentation process [13,14] for which the principal inconvenient for sustainable largescale production is the necessity of a neutralization step in order to avoid enzymes deactivation by the produced acid [15]. This problem could be solved either by using a base or by the substitution of the enzymes with a heterogeneous catalyst able to oxidize glucose under mild base-free conditions by using either O2 or H2O2 as oxidants [16][17][18][19].…”

“…Industrially D-Gluconic acid is produced by enzymatic fermentation process [13,14] for which the principal inconvenient for sustainable largescale production is the necessity of a neutralization step in order to avoid enzymes deactivation by the produced acid [15]. This problem could be solved either by using a base or by the substitution of the enzymes with a heterogeneous catalyst able to oxidize glucose under mild base-free conditions by using either O2 or H2O2 as oxidants [16][17][18][19].Although the use of base (NaOH and a relatively high pH of around 9-9.5) results in increase of heterogeneous catalyst's activity due to particle size stabilization and metal leaching suppression [20][21][22], a decrease in the selectivity to gluconic acid is often observed caused by the glucose to fructose isomerization process [23]. In addition, the formation of gluconate salt instead of pure gluconic acid occurs and entails the need of cost effective post-reaction treatment to obtain the target acid.…”

Catalytic Oxidation Pathways for the Production of Carboxylic Acids from Biomass

“…7.9 ), which was active and selective for the transformation of glucose to gluconic acid even at temperatures as low as 50 °C and especially when the two metals were present in a 1:1 ratio [ 96 ]. The activity and selectivity of bimetallic Pd-Te/SiO 2 and Pd-Te/Al 2 O 3 catalysts containing 5 wt.% of Pd and 0.3-5 wt.% Te also showed high catalytic activities in the oxidation of glucose to gluconic acid [ 105 ].…”