Palladium nanoparticle decorated high nitrogen-doped graphene with high catalytic activity for Suzuki–Miyaura and Ullmann-type coupling reactions in aqueous media

Movahed, Siyavash Kazemi; Dabiri, Minoo; Bazgir, Ayoob

doi:10.1016/j.apcata.2014.09.045

Cited by 80 publications

(39 citation statements)

References 48 publications

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“…This defect results in the significant decline of their catalytic reactivity. In order to prevent the aggregation and/or decrease the coverage for the surface of the metal nanocatalysts, some researchers immobilize the metal NPs into silica nanosphere , grapheme and dendrimer , block copolymer , or into the materials with a porous shell such as silica , carbon , and metal oxides . However, the drawbacks have not yet been eradicated since the supports often aggregate in applications, leading to the deteriorative performance and the decreased continuous reuse .…”

Section: Introductionmentioning

confidence: 99%

A novel poly(vinylidene fluoride) composite membrane for catalysis and separation

Chen

et al. 2017

Polymer Engineering & Sci

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Timely separation of products from the reactant is a great challenge for a catalytic reaction process. In this study, we fabricated a novel poly(vinylidene fluoride) composite membrane with noble metal (Au, Ag, and Pd) nanoparticles in membrane pores to solve the faced challenge. The composite membrane has a unique structure comprising membrane surfaces with only PVDF and membrane pores with poly(methacrylic acid) microspheres coated by noble metal nanoparticles. The composite membrane is used for the catalytic reduction of p‐nitrophenol and the results indicate that the catalytic reaction can rapidly proceed. What is more, the product formed in reaction process can be immediately isolated from the reactant. Other drawbacks such as the easy aggregation and the difficult separation generally encountered by the metal nanocatalysts are also avoided by using the composite membrane. In operation process, the composite membrane shows good thermal, mechanical and catalytic stability. These attracted merits make the prepared composite membrane have desirable prospects in catalytic application. POLYM. ENG. SCI., 58:150–159, 2018. © 2017 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

A novel poly(vinylidene fluoride) composite membrane for catalysis and separation

Chen

et al. 2017

Polymer Engineering & Sci

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“…For this purpose, XRD diffractogram of pristine graphite, GRO, and PG-HRG-Pd-1 were measured as shown in Figure 4. Typically, graphite consists of an intense reflection at 26.4° (002), which is moved to the lower brag angle in case of GRO at 10.9° corresponding to (001) plane with d-spacing of 0.81 nm, due to the addition of various oxygen containing functional groups between the graphite layers during the oxidation process [42]. Notably, in the XRD pattern after reduction, i.e., of PG-HRG-Pd-1, a broad reflection appeared at ~22.4° (002), whereas the reflection corresponding to (001) plane of GRO at 10.9° disappeared.…”

Section: Xrd Analysismentioning

confidence: 99%

Plant Extract Mediated Eco-Friendly Synthesis of Pd@Graphene Nanocatalyst: An Efficient and Reusable Catalyst for the Suzuki-Miyaura Coupling

et al. 2017

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Suzuki-Miyaura coupling reaction catalyzed by the palladium (Pd)-based nanomaterials is one of the most versatile methods for the preparation of biaryls. However, use of organic solvents as reaction medium causes a big threat to environment due to the generation of toxic byproducts as waste during the work up of these reactions. Therefore, the use of water as reaction media has attracted tremendous attention due to its environmental, economic, and safety benefits. In this study, we report on the synthesis of green Pd@graphene nanocatalyst based on an in situ functionalization approach which exhibited excellent catalytic activity towards the Suzuki-Miyaura cross-coupling reactions of phenyl halides with phenyl boronic acids under facile conditions in water. The green and environmentally friendly synthesis of Pd@graphene nanocatalyst (PG-HRG-Pd) is carried out by simultaneous reduction of graphene oxide (GRO) and PdCl 2 using Pulicaria glutinosa extract (PGE) as reducing and stabilizing agent. The phytomolecules present in the plant extract (PE) not only facilitated the reduction of PdCl 2 , but also helped to stabilize the surface of PG-HRG-Pd nanocatalyst, which significantly enhanced the dispersibility of nanocatalyst in water. The identification of PG-HRG-Pd was established by various spectroscopic and microscopic techniques, including, high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), ultraviolet-visible spectroscopy (UV-Vis), Fourier transform infrared spectroscopy (FT-IR), and Raman spectroscopy. The as-prepared PG-HRG-Pd nanocatalyst demonstrated excellent catalytic activity towards the Suzuki-Miyaura cross coupling reactions under aqueous, ligand free, and aerobic conditions. Apart from this the reusability of the catalyst was also evaluated and the catalyst yielded excellent results upon reuse for several times with marginal loss of its catalytic performance. Therefore, the method developed for the green synthesis of PG-HRG-Pd nanocatalyst and the eco-friendly protocol used for the Suzuki coupling offers a mild and effective substitute to the existing protocols and may significantly contribute to the endeavors of green chemistry.

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“…Thus, there is still a long but broad way ahead for their practical applications. [170][171][172][173] Finally, it is well known that the catalytic performances of the heterogeneous catalysts are closely related to their microstructures. Firstly, some new synthetic strategies are still needed to be explored with the aim to further improve the catalytic performance, to reduce the production cost, and to precisely control the properties of the graphene support.…”

Section: Discussionmentioning

confidence: 99%

Graphene-supported metal/metal oxide nanohybrids: synthesis and applications in heterogeneous catalysis

Cheng

Fan

Pei

et al. 2015

Catal. Sci. Technol.

127

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Palladium nanoparticle decorated high nitrogen-doped graphene with high catalytic activity for Suzuki–Miyaura and Ullmann-type coupling reactions in aqueous media

Cited by 80 publications

References 48 publications

A novel poly(vinylidene fluoride) composite membrane for catalysis and separation

A novel poly(vinylidene fluoride) composite membrane for catalysis and separation

Plant Extract Mediated Eco-Friendly Synthesis of Pd@Graphene Nanocatalyst: An Efficient and Reusable Catalyst for the Suzuki-Miyaura Coupling

Graphene-supported metal/metal oxide nanohybrids: synthesis and applications in heterogeneous catalysis

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