Palladium nanoparticles in poly(ethyleneglycol): the efficient and recyclable catalyst for Heck reaction

Luo, Congcong; Zhang, Yuhong; Wang, Yanguang

doi:10.1016/j.molcata.2004.10.039

Cited by 210 publications

(42 citation statements)

References 43 publications

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“…The profiles of the UV-visible spectra for the Pd(II) ions and PdNPs are shown in Figure 1. Before the addition of NaBH 4 , an absorption band at around 300 nm due to the presence of Pd(II) ions in solution is observed [1,8,23,24].…”

Section: Nanoparticle Characterizationmentioning

confidence: 99%

“…In pursuing this objective, several authors have investigated the use of poly(ethylene glycol)@PdNPs (PEG@PdNPs) prepared simply by heating solutions containing polymers and a salt as a source of Pd(II) ions [1,8]. PEG@PdNPs can even be generated in situ during catalyzed ultrafast Suzuki-Miyaura cross-coupling reactions at room temperature [9,10].…”

Section: Introductionmentioning

confidence: 99%

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Polymer-coated palladium nanoparticle catalysts for Suzuki coupling reactions

Bortolotto

Facchinetto

Trindade

et al. 2015

Journal of Colloid and Interface Science

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Section: Nanoparticle Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polymer-coated palladium nanoparticle catalysts for Suzuki coupling reactions

Bortolotto

Facchinetto

Trindade

et al. 2015

Journal of Colloid and Interface Science

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“…Finally, the Pd/C catalysts were prepared by electroless reduction in aqueous solution of Vulcan XC-72-impregnated PdCl 2 /HCl with ethylene glycol at high temperature [50][51][52] or with NaBH 4 at 0-5 8C. [15] Catalyst Characterization…”

Section: Catalyst Synthesismentioning

confidence: 99%

Ethanol Oxidation on Electrocatalysts Obtained by Spontaneous Deposition of Palladium onto Nickel‐Zinc Materials

et al. 2009

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Ni-Zn and Ni-Zn-P alloys supported on Vulcan XC-72 are effective materials for the spontaneous deposition of palladium through redox transmetalation with Pd(IV) salts. The materials obtained, Pd-(Ni-Zn)/C and Pd-(Ni-Zn-P)/C, have been characterized by a variety of techniques. The analytical and spectroscopic data show that the surface of Pd-(Ni-Zn)/C and Pd-(Ni-Zn-P)/C contain very small, highly dispersed, and highly crystalline palladium clusters as well as single palladium sites, likely stabilized by interaction with oxygen atoms from Ni--O moieties. As a reference material, a nanostructured Pd/C material was prepared by reduction of an aqueous solution of PdCl(2)/HCl with ethylene glycol in the presence of Vulcan XC-72. In Pd/C, the Pd particles are larger, less dispersed, and much less crystalline. Glassy carbon electrodes coated with the Pd-(Ni-Zn)/C and Pd-(Ni-Zn-P)/C materials, containing very low Pd loadings (22-25 microg cm(-2)), were studied for the oxidation of ethanol in alkaline media in half cells and provided excellent results in terms of both specific current (as high as 3600 A g(Pd)(-1) at room temperature) and onset potential (as low as -0.6 V vs Ag/AgCl/KCl(sat)).

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“…In addition, Pd is exploited as a catalyst in various coupling reactions like Heck coupling (Karimi and Enders 2006), Suzuki coupling (Klingensmith and Leadbeater 2003), and hydrogenation of allyl alcohols (Wilson et al 2006). Till now, production of PdNPs involved different reducing chemicals such as NaBH 4 (Jana et al 2000;Domenech et al 2011), N 2 H 4 (Yonezawa et al 2001;Szilvia et al 2007), ascorbic acid (Sun et al 2007) and PEG (Luo et al 2005;El-Houta et al 2012). Over the past decade there has been an increased interest in the green chemistry (Roucoux et al 2002;Raveendran et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Green synthesis, characterization and catalytic activity of palladium nanoparticles by xanthan gum

et al. 2014

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Here, we report the synthesis, characterization and catalytic evaluation of palladium nanoparticles (PdNPs) using xanthan gum, acting as both reducing and stabilizing agent without using any synthetic reagent. The uniqueness of our method lies in its fast synthesis rates using hydrothermal method in autoclave at a pressure of 15 psi and at 120°C temperature by 10 min time. The formation and size of the PdNPs were characterized by UV-visible spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy and transmission electron microscopy. The catalytic activity of PdNPs was evaluated on the reduction of 4-nitrophenol to 4-aminophenol by sodium borohydride using spectrophotometry.

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Palladium nanoparticles in poly(ethyleneglycol): the efficient and recyclable catalyst for Heck reaction

Cited by 210 publications

References 43 publications

Polymer-coated palladium nanoparticle catalysts for Suzuki coupling reactions

Polymer-coated palladium nanoparticle catalysts for Suzuki coupling reactions

Ethanol Oxidation on Electrocatalysts Obtained by Spontaneous Deposition of Palladium onto Nickel‐Zinc Materials

Green synthesis, characterization and catalytic activity of palladium nanoparticles by xanthan gum

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