Pd–PPy nanocomposite on the surface of carbon nanotubes: synthesis and catalytic activity

Konstantin V Gor’kov; Nataliia V Talagaeva; Jean-Cyrille Hierso; Igor S Bezverkhyy; Polina A Pisareva; Mikhail Vorotyntsev; Ekaterina V Zolotukhina

Pd–PPy nanocomposite on the surface of carbon nanotubes: synthesis and catalytic activity

Konstantin V Gor’kov ¹ Nataliia V Talagaeva ^{1, 2} Jean-Cyrille Hierso ³ Igor S Bezverkhyy ⁴ Polina A Pisareva ⁵ Mikhail Vorotyntsev ^{1, 2, 3, 5} Ekaterina V Zolotukhina ^{1, 5}

1 Institute of Problems of Chemical Physics of RAS

2 Mendeleev University of Chemical Technology of Russia

3 ICMUB - Institut de Chimie Moléculaire de l'Université de Bourgogne [Dijon]

4 LICB - Laboratoire Interdisciplinaire Carnot de Bourgogne

5 MSU - Lomonosov Moscow State University

Abstract : In the presence of carbon nanotubes (CNTs), palladium (Pd)-polypyrrole (PPy)@CNT nanocomposites have been synthesized by way of one-pot and one-step colloidal synthesis from a solution of a palladium inorganic salt and organic pyrrole as monomeric precursor to PPy. This efficient method leads to the growth of nanoparticles of the palladium inorganic component distributed inside a polymer matrix supported on CNTs. After characterization, palladium-PPy@CNT nanocomposites have been employed as efficient heterogeneous catalysts for direct C-H bond functionalization toward C-C bond coupling formation. The notable catalytic activity of the palladium-PPy@CNT nanocomposite decreased with successive catalytic cycles when using the same portion of the composite. This was attributed to palladium redistribution inside the PPy matrix, which occurs by way of a specific mechanism involving the reaction solvent and the composite during C-C coupling reaction. This mechanism is recrystallization of palladium nanoparticles in conductive PPy matrix. Nevertheless, the use of palladium-PPy@CNT nanocomposite in first cycle of investigated catalytic reaction facilitates C-C bond coupling formation: reaction occurs at lower temperature in comparison with homogeneous catalysts.

Keywords : catalyst hybrid materials nanocomposites one-pot synthesis palladium-polypyrrole nanocomposite prussian blue composite films electrocatalytic properties electrochromic properties efficient catalyst nanoparticles polymer polyaniline

Type de document :

Communication dans un congrès

Domaine :

Chimie

Chimie / Matériaux

Liste complète des métadonnées

https://hal-univ-bourgogne.archives-ouvertes.fr/hal-01589821
Contributeur : Icmub - Université de Bourgogne <>
Soumis le : mardi 19 septembre 2017 - 10:34:16
Dernière modification le : vendredi 8 juin 2018 - 14:50:14

Pd–PPy nanocomposite on the surface of carbon nanotubes: synthesis and catalytic activity

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