Cu nanoclusters supported on nanocrystalline SiO₂–MnO₂: a bifunctional catalyst for the one-step conversion of glycerol to acrylic acid

Abstract

A material consisting of highly dispersed Cu nanoclusters anchored on nanocrystalline SiO2-MnO2 has been prepared, and was found to act as a bifunctional catalyst for the one-step conversion of glycerol to acrylic acid using H2O2. Under optimized conditions a glycerol conversion of 77.1%, with 74.7% selectivity for acrylic acid, was achieved after 30 h reaction time.

Glycerol hydrogenolysis into useful C3 chemicals

“…Because acrolein is mainly used for acrylic acid formation, the direct production of acrylic acid from glycerol is also attractive. In recent 5 years, direct synthesis of acrylic acid from glycerol has been extensively reported [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37]. In the processes, acrolein is generated as an intermediate and it is further oxidized into acrylic acid under either O 2 or air flow conditions.…”

New efficient and recyclable catalysts for the synthesis of di- and tri-glycerol carbonates

“…20,21 The catalytic hydrogenolysis of glycerol is a route to increase the profitability of biodiesel production plants. [22][23][24][25][26][27] Products such us propylene glycols are used for the synthesis of polyester resins, liquid detergents, drugs and cosmetics.…”

Aluminum(III) triflate-catalyzed selective oxidation of glycerol to formic acid with hydrogen peroxide

“…The oxidation of GLY to FA can be promoted significantly by carrying out acid-hydrolysis using inorganic acids (B acids) as additives (such as H2SO4, HCl, and H3SiW12O4) [9,[15][16][17]. Besides, the assembly of highly dispersed Cu nanoclusters anchored on nanocrystalline SiO2-MnO2 has been employed as a bifunctional catalyst for one-step conversion of GLY to acrylic acid using hydrogen peroxide, where SiO2 and hexagonal MnO2 sites act as acid sites for the dehydration reaction (GLY to acrolein), while Cu + sites are responsible for the oxidation reaction [18]. Furthermore, polyoxometalates MPMo12O40 (M = Al 3+ or Cr 3+ ) (with PMo12O40 as the redox center) coupled with L acid sites Al 3+ or Cr 3+ have been found to be highly efficient for the production of lactate acid from GLY [19].…”