Synthesis of supported palladium catalysts

Toebes, Marjolein L.; Dillen, Jos A. van; Jong, Krijn P. de

doi:10.1016/s1381-1169(01)00146-7

Cited by 318 publications

(221 citation statements)

References 102 publications

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“…These catalysts are indeed very favorable from a sustainable point of view [15]. In the past decade, many efforts have been dedicated for the immobilization of metal complexes on various supports to combine the privileges of both homogeneous and heterogeneous catalysts [16,17]. Furthermore, industrial heterogeneous catalysts composed of supported metal particles or NPs were also prepared for practical applications.…”

Section: Open Accessmentioning

confidence: 99%

Magnetically Separable and Sustainable Nanostructured Catalysts for Heterogeneous Reduction of Nitroaromatics

Shokouhimehr

2015

Catalysts

183

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This review is focused on the strategies and designs of magnetic nanostructured catalysts showing the enhanced and sustainable catalytic performances for the heterogeneous reduction of nitoaromatics. Magnetic catalysts have the benefits of easy recovery and reuse after the completion of the reactions and green chemical processes. Magnetic separation, among the various procedures for removing catalysts, not only obviates the requirement of catalyst filtration or centrifugation after the completion of reactions, but also provides a practical technique for recycling the magnetized nanostructured catalysts. Consequently, discussions will address the methodologies and exemplars for the reusable magnetic composite catalysts. Because the synthesis of ideal magnetic nanostructured catalysts is of primary importance in the development of high-quality sustainable processes, the designs, preparation methods and recyclability of various recoverable magnetic nanostructured catalysts are emphasized. The representative methods and strategies for the synthesis of durable and reusable magnetic nanostructured catalysts are highlighted. The advantages, disadvantages, recyclability and the efficiency of the introduced heterogeneous systems have been explored in the reduction of nitrobenzene derivatives.

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Section: Open Accessmentioning

confidence: 99%

Magnetically Separable and Sustainable Nanostructured Catalysts for Heterogeneous Reduction of Nitroaromatics

Shokouhimehr

2015

Catalysts

183

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“…(2,54). A representative example of a well-defined Schmid's cluster Au 55 (PPh 3 ) 12 Cl 6 is presented in Fig. 4 (2).…”

Section: Stabilizing Ligandsmentioning

confidence: 99%

Recent Advances in the Liquid‐Phase Synthesis of Metal Nanostructures with Controlled Shape and Size for Catalysis

2009

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“…Highly dispersed Pd particles find widespread use in a number of silica-supported reaction systems [19][20][21][22][23][24][34][35][36][37][38][39][40][41][42][43], with many of those prepared via impregnation of silicas with Pd salts (chloride, nitrate) or adsorption of Pd complexes (acetate, ammine). For the latter, several studies have been conducted to characterize the adsorption, decomposition, nucleation, and activation of ligand-coordinated Pd precursor species brought into contact with high surface-area silicas within aqueous environments [21,22,24].…”

Section: Comparisons With Solution-based Pd Deposition Via [Pd(nh 3 )mentioning

confidence: 99%

“…To track the condition-dependent evolution of Pd remaining on the surface following our solution-based deposition, we have generated Figure 6, which shows the Pd 3d (Figure 6a centers [46]. Notably, we see no evidence of Pd film penetration, which we ascribe to the presence of the large ligand-spheres surrounding the Pd-centers that are also noted to result in high dispersion over higher surface-area silicates [19][20][21][22][23][34][35][36][37][38].…”

Section: Comparisons With Solution-based Pd Deposition Via [Pd(nh 3 )mentioning

confidence: 99%

Exploring Pd adsorption, diffusion, permeation, and nucleation on bilayer SiO2/Ru as a function of hydroxylation and precursor environment: From UHV to catalyst preparation

et al. 2016

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The hydroxylation-dependent permeability of bilayer SiO 2 supported on Ru(0001) was investigated by XPS and TDS studies in a temperature range of 100 K to 600 K. For this, the thermal behavior of Pd evaporated at 100 K, which results in surface and sub-surface (Rusupported) binding arrangements, was examined relative to the extent of pre-hydroxylation. Samples containing only defect-mediated hydroxyls showed no effect on Pd diffusion through the film at low temperature. If, instead, the concentration of strongly bound hydroxyl groups and associated weakly bound water molecules was enriched by an electron-assisted hydroxylation procedure, the probability for Pd diffusion through the film is decreased via a pore-blocking mechanism. Above room temperature, all samples showed similar behavior, reflective of particle nucleation above the film and eventual agglomeration with any metal-atoms initially binding beneath the film. When depositing Pd onto the same SiO 2 /Ru model-support via adsorption of [Pd(NH 3 ) 4 ]Cl 2 from alkaline (pH 12) precursor solution, we observe notably different adsorption and nucleation mechanisms. The resultant Pd adsorption complexes follow established decomposition pathways to produce model-catalyst systems compatible with those created exclusively within UHV despite lacking the ability to penetrate the film due to the increased size of the initial Pd precursor groups.

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Synthesis of supported palladium catalysts

Cited by 318 publications

References 102 publications

Magnetically Separable and Sustainable Nanostructured Catalysts for Heterogeneous Reduction of Nitroaromatics

Magnetically Separable and Sustainable Nanostructured Catalysts for Heterogeneous Reduction of Nitroaromatics

Recent Advances in the Liquid‐Phase Synthesis of Metal Nanostructures with Controlled Shape and Size for Catalysis

Exploring Pd adsorption, diffusion, permeation, and nucleation on bilayer SiO2/Ru as a function of hydroxylation and precursor environment: From UHV to catalyst preparation

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