Supported Pd Nanoparticles for Carbon–Carbon Coupling Reactions

Taladriz‐Blanco, Patricia; Hervés, Pablo; Pérez‐Juste, Jorge

doi:10.1007/s11244-013-0082-6

Cited by 72 publications

(48 citation statements)

References 71 publications

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“…Palladium nanoparticles (PdNPs) [11] have been established as a promising alternative in the search for highly active ligand-free catalysts due to their high surface-to-volume ratio and their highly active surface atoms compared to those of the bulk catalysts. The use of PdNPs reduces costs, simplifies workup procedures, facilitates the separation of the final product, and allows recycling and continuous processing, especially when they are immobilized in a solid support [12]. Palladium nanoparticles supported on graphene and graphene derivatives increase the surface area of the composite, enlarging the distance between the sheets.…”

Section: Introductionmentioning

confidence: 99%

Palladium nanoparticles supported on graphene and reduced graphene oxide as efficient recyclable catalyst for the Suzuki–Miyaura reaction of potassium aryltrifluoroborates

Gómez‐Martínez

Buxaderas

Pastor

et al. 2015

Journal of Molecular Catalysis A: Chemical

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Section: Introductionmentioning

confidence: 99%

Palladium nanoparticles supported on graphene and reduced graphene oxide as efficient recyclable catalyst for the Suzuki–Miyaura reaction of potassium aryltrifluoroborates

Gómez‐Martínez

Buxaderas

Pastor

et al. 2015

Journal of Molecular Catalysis A: Chemical

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“…Because of the popularity of Pd chemistry, Pd NPs have been studied extensively [12,13]. Syntheses of these nanoparticles employ a variety of Pd precursors and stabilisers.…”

Section: Nanoparticle Catalysismentioning

confidence: 99%

Halide-Enhanced Catalytic Activity of Palladium Nanoparticles Comes at the Expense of Catalyst Recovery

et al. 2017

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Abstract:In this communication, we present studies of the oxidative homocoupling of arylboronic acids catalyzed by immobilised palladium nanoparticles in aqueous solution. This reaction is of significant interest because it shares a key transmetallation step with the well-known Suzuki-Miyaura cross-coupling reaction. Additives can have significant effects on catalysis, both in terms of reaction mechanism and recovery of catalytic species, and our aim was to study the effect of added halides on catalytic efficiency and catalyst recovery. Using kinetic studies, we have shown that added halides (added as NaCl and NaBr) can increase the catalytic activity of the palladium nanoparticles more than 10-fold, allowing reactions to be completed in less than half a day at 30 • C. However, this increased activity comes at the expense of catalyst recovery. The results are in agreement with a reaction mechanism in which, under conditions involving high concentrations of chloride or bromide, palladium leaching plays an important role. Considering the evidence for analogous reactions occurring on the surface of palladium nanoparticles under different reaction conditions, we conclude that additives can exert a significant effect on the mechanism of reactions catalyzed by nanoparticles, including switching from a surface reaction to a solution reaction. The possibility of this switch in mechanism may also be the cause for the disagreement on this topic in the literature.

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“…This shows that Pd leaching can catalyze this coupling reaction. Nevertheless, this test could lead to inaccurate conclusions if fast redeposition of soluble species occurs; if an induction period can be observed, due to an activation of the catalyst, the immobilized species is definitely not the active catalytic species [42]. Palladium leaching was also taken into consideration.…”

Section: Repeated Use Of the Pd-diimine@sba-15 Catalystmentioning

confidence: 99%

Preparation of Pd-Diimine@SBA-15 and Its Catalytic Performance for the Suzuki Coupling Reaction

Shen

Cao

et al. 2016

Catalysts

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Abstract:A highly efficient and stable Pd-diimine@SBA-15 catalyst was successfully prepared by immobilizing Pd onto diimine-functionalized mesoporous silica SBA-15. With the help of diimine functional groups grafted onto the SBA-15, Pd could be anchored on a support with high dispersion. Pd-diimine@SBA-15 catalyst exhibited excellent catalytic performance for the Suzuki coupling reaction of electronically diverse aryl halides and phenylboronic acid under mild conditions with an ultralow amount of Pd (0.05 mol % Pd). When the catalyst amount was increased, it could catalyze the coupling reaction of chlorinated aromatics with phenylboronic acid. Compared with the catalytic performances of Pd/SBA-15 and Pd-diimine@SiO 2 catalysts, the Pd-diimine@SBA-15 catalyst exhibited higher hydrothermal stability and could be repeatedly used four times without a significant decrease of its catalytic activity.

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Supported Pd Nanoparticles for Carbon–Carbon Coupling Reactions

Cited by 72 publications

References 71 publications

Palladium nanoparticles supported on graphene and reduced graphene oxide as efficient recyclable catalyst for the Suzuki–Miyaura reaction of potassium aryltrifluoroborates

Palladium nanoparticles supported on graphene and reduced graphene oxide as efficient recyclable catalyst for the Suzuki–Miyaura reaction of potassium aryltrifluoroborates

Halide-Enhanced Catalytic Activity of Palladium Nanoparticles Comes at the Expense of Catalyst Recovery

Preparation of Pd-Diimine@SBA-15 and Its Catalytic Performance for the Suzuki Coupling Reaction

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