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Communication Dans Un Congrès Année : 2018

Elaboration of composite materials from gold thiolate clusters and MOFs as catalysts for valorization of hexoses

Z. Shahin
  • Fonction : Orateur
  • PersonId : 1033968
A. Demessence
  • Fonction : Auteur
F. Rataboul

Résumé

Atomically well-defined gold nano-clusters (GNCs), due to their size related properties, are known to be active in oxidation catalysis at relatively low temperature.1 Besides, Metal-Organic Frameworks (MOFs) are hybrid materials that have shown interest in various fields from selective adsorption to catalysis due their large surface area and pore size tunabiliy.2,3 Thus coupling these two materials will lead to get multisite composite catalysts for the conversion of hexoses. In our study we aim at combining the properties of both MOFs (texture, stability, acidic features) and GNCs (oxidation abilities) in one composite solid to generate two catalytic sites and synergetic effects, for the selective valorization of biomass into value-added products.4,5 Thus we prepared nanoparticles of a Lewis acid-based MOF: the MIL-101(Cr), made of terephthalate and Cr(III) cations, and different thiolate functionalized Au25(SR)18. The new composite materials (GNC@MOF) have been synthesized to support the clusters on the surface or inside the pores of the MOFs (see Figure 1). Then the initial results on heterogeneous catalysis will be presented using hexoses (glucose, fructose) as substrates for their valorization into valuable chemicals in oxidative conditions. We particularly investigated first the distinct effect of MOFs and GNCs followed by their synergy on the substrate reactivity. In addition, the effect of calcined and non-calcined GNCs supported on MOFs will be tested on catalysis, to study the effect of the presence of the thiolate ligands.
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Dates et versions

hal-01841042 , version 1 (17-07-2018)

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  • HAL Id : hal-01841042 , version 1

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Z. Shahin, A. Demessence, Rodica Chiriac, F. Rataboul. Elaboration of composite materials from gold thiolate clusters and MOFs as catalysts for valorization of hexoses. Gold 2018, Jul 2018, Paris, France. ⟨hal-01841042⟩
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