Dispersion and hydrogenation activity of surfactant-stabilized Rh(0) nanoparticles prepared on different mesoporous supports

Boutros, Maya; Shirley, Guillaume; Onfroy, Thomas; Launay, Franck

doi:10.1016/j.apcata.2010.12.035

Cited by 17 publications

(8 citation statements)

References 56 publications

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“…The amino-functionalized SBA-15 (for short {NH 2 }-SBA-15) was obtained by the functionalization of a pre-formed SBA-15 silica [49] with 3-aminopropyltriethoxysilane (Scheme S1), as described previously, targeting 4 mmol g À 1 . [50][51] The thermogravimetric curve of {NH 2 }-SBA-15 (Figure 3) obtained under air from room temperature up to 700°C shows two weight losses. The first one (ca.…”

Section: Synthesis and Characterization Of {Nh 2 }-Sba-15 And Of The Covalently Immobilized Ni 2 + (2) And Mn 3 + (3) Catalystsmentioning

confidence: 99%

Advantages of Covalent Immobilization of Metal‐Salophen on Amino‐Functionalized Mesoporous Silica in Terms of Recycling and Catalytic Activity for CO₂ Cycloaddition onto Epoxides

et al. 2021

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Dedicated to the memory of Professor Michel CheNi II and Mn III Schiff base complexes (Salophen-Ni and Salophen-MnCl) bearing a pending carboxylic group were prepared and characterized. Both complexes were grafted onto a mesoporous amino-functionalized SBA-15 silica, by formation of an amide function between the propylamine groups of the support and the carboxylic acid functions of the salophen ligand (corresponding respective to 1.30 wt.% of Ni and 1.06 wt.% of Mn). The co-catalytic behaviour of the free and grafted complexes was then evaluated in the CO 2 cycloaddition reaction onto styrene oxide, using tetra-butylammonium bromide ( nÀ Bu 4 NBr) as the main catalyst. In homogeneous conditions, the Mn III Schiff base complex and the Ni II one, to a lesser extent, behave as efficient co-catalysts for this reaction (styrene conversion of 100 % and 65 % respectively after 3 h at 120°C, under 15 bars of CO 2 ). Upon immobilization at the surface of the aminofunctionalized SBA-15, we showed that the co-catalytic activity of the less efficient one, i. e. Ni 2 + salophen complex, could be enhanced (reaching a full conversion after 7 h), hence highlighting a potential synergistic effect between the unused amine functions of the support and the Ni 2 + salophen cocatalyst. Both salophen complexes were successfully re-used in homogeneous conditions or after their immobilization without any appreciable loss of activity. This work is only a first step towards a completely heterogeneous catalytic system, in which the tetraalkylammonium halide catalyst and the metal-salophen co-catalyst will both be covalently anchored on the same support.

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Section: Synthesis and Characterization Of {Nh 2 }-Sba-15 And Of The Covalently Immobilized Ni 2 + (2) And Mn 3 + (3) Catalystsmentioning

confidence: 99%

Advantages of Covalent Immobilization of Metal‐Salophen on Amino‐Functionalized Mesoporous Silica in Terms of Recycling and Catalytic Activity for CO₂ Cycloaddition onto Epoxides

et al. 2021

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“…Previously reported methods for solid-supported RhNP synthesis involve impregnation-reduction methods using RhCl3, Rh(NH3)6Cl3, Rh(CH3CO2)2 or Rh(NO3)3 precursors followed by sodium borohydride or H2 high-temperature (400-1000 °C) reduction, or dispersal methods using preformed RhNP [89,90], vapour deposition [91], flame spray pyrolysis [92] and laser ablation [93] techniques. Support materials include montmorillonite [94], silica [95], CNT [96], titania [97], alumina [98], ceria [99], zirconia [100], and MgAl2O4 [101]. The use of ion-exchange resins has gone almost unexplored.…”

Section: Rhnp@resinmentioning

confidence: 99%

Metal nanoparticles immobilized on ion-exchange resins: A versatile and effective catalyst platform for sustainable chemistry

Liguori

Moreno‐Marrodán

Barbaro

2015

Chinese Journal of Catalysis

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“…In order to stabilize the Rh nanoparticles, polymers and surfactants are oen used. [22][23][24][25][26] However, Sayed's group and Korgel's group have reported that surfactants or capping ligands used in the synthesis of metallic nanoparticles can diminish the catalytic activity of the produced metallic nanocatalysts. Somorjai and co-workers have also reported that poly vinylpyrrolidone (PVP), the most widely used capping agent in size-tunable and shaped nanoparticles synthesis, interacted strongly with Rh nanoparticles resulting in a signicant capping agent effect.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of TiO₂ nanotube supported Rh-nanoparticle catalysts for regioselective hydroformylation of vinyl acetate

Shi

Zhu

et al. 2014

RSC Adv.

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Dispersion and hydrogenation activity of surfactant-stabilized Rh(0) nanoparticles prepared on different mesoporous supports

Cited by 17 publications

References 56 publications

Advantages of Covalent Immobilization of Metal‐Salophen on Amino‐Functionalized Mesoporous Silica in Terms of Recycling and Catalytic Activity for CO₂ Cycloaddition onto Epoxides

Advantages of Covalent Immobilization of Metal‐Salophen on Amino‐Functionalized Mesoporous Silica in Terms of Recycling and Catalytic Activity for CO₂ Cycloaddition onto Epoxides

Metal nanoparticles immobilized on ion-exchange resins: A versatile and effective catalyst platform for sustainable chemistry

Synthesis and characterization of TiO₂ nanotube supported Rh-nanoparticle catalysts for regioselective hydroformylation of vinyl acetate

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Dispersion and hydrogenation activity of surfactant-stabilized Rh(0) nanoparticles prepared on different mesoporous supports

Cited by 17 publications

References 56 publications

Advantages of Covalent Immobilization of Metal‐Salophen on Amino‐Functionalized Mesoporous Silica in Terms of Recycling and Catalytic Activity for CO2 Cycloaddition onto Epoxides

Advantages of Covalent Immobilization of Metal‐Salophen on Amino‐Functionalized Mesoporous Silica in Terms of Recycling and Catalytic Activity for CO2 Cycloaddition onto Epoxides

Metal nanoparticles immobilized on ion-exchange resins: A versatile and effective catalyst platform for sustainable chemistry

Synthesis and characterization of TiO2 nanotube supported Rh-nanoparticle catalysts for regioselective hydroformylation of vinyl acetate

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Advantages of Covalent Immobilization of Metal‐Salophen on Amino‐Functionalized Mesoporous Silica in Terms of Recycling and Catalytic Activity for CO₂ Cycloaddition onto Epoxides

Advantages of Covalent Immobilization of Metal‐Salophen on Amino‐Functionalized Mesoporous Silica in Terms of Recycling and Catalytic Activity for CO₂ Cycloaddition onto Epoxides

Synthesis and characterization of TiO₂ nanotube supported Rh-nanoparticle catalysts for regioselective hydroformylation of vinyl acetate