Development of polyol method for the synthesis of concentrated colloids of PVP-stabilised Ru nanoparticles

Carbon Supported Size-Controlled Ru Catalysts for Selective Levulinic Acid Hydrogenation into γ-Valerolactone

“…Colloidal Ru NPs (0.1 M) were synthesized by the polyol method using RuCl 3 •nH 2 O and ethylene glycol (EG) as a metal precursor and a reducing agent, respectively. Generally, RuCl 3 ×nH 2 O and PVP (mol Ru/mol monomers PVP 1/5) were dissolved in EG under stirring and heating up to 198°C for 1h [13] under reflux conditions. Immobilization of Ru NPs on the support was carried out through incipient wetness impregnation using alcohol solutions of metal NPs.…”

“…Colloidal Ru NPs were synthesized by the polyol method in EG using PVP as a capping agent similar to the method presented in [13][14][15][16]. This method was shown to provide formation of highly concentrated solutions of colloidal Ru NPs with a relatively low amount of the capping agent (Ru/PVP 1/5) demonstrating good stability at least during 24 months.…”

“…Synthesis and application of Ru colloidal catalysts was reported recently [12]. In our earlier works a colloidal method synthesis for Ru NPs immobilized on the carbon support was successfully developed [13]. It was shown that a highly concentrated colloidal solution of well-defined Ru NPs (0.1 M) can be obtained by the polyol method using polyvinylpyrrolidone (PVP) as a stabilizing agent under a minor PVP excess (mol Ru/mol PVP monomer 1/5) [13].…”

“…In our earlier works a colloidal method synthesis for Ru NPs immobilized on the carbon support was successfully developed [13]. It was shown that a highly concentrated colloidal solution of well-defined Ru NPs (0.1 M) can be obtained by the polyol method using polyvinylpyrrolidone (PVP) as a stabilizing agent under a minor PVP excess (mol Ru/mol PVP monomer 1/5) [13]. High activity of colloidal catalysts was demonstrated in hydrogenation of galactose and arabinose into corresponding commercially valuable sugar alcohols [14,15].…”

“…Reaction conditions levulinic acid 0.7 ml, 1,4-dioxane 15 ml, catalyst 240 mg, T=165°C, 20 bar Н Journal of Siberian Federal University. Chemistry 2020 13(1):[5][6][7][8][9][10][11][12][13][14][15][16]…”