scholarly journals Pd Nanoparticles-Loaded Vinyl Polymer Gels: Preparation, Structure and Catalysis

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 137
Author(s):  
Elsayed Elbayoumy ◽  
Yuting Wang ◽  
Jamil Rahman ◽  
Claudio Trombini ◽  
Masayoshi Bando ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Methyl Methacrylate ◽  
Palladium Nanoparticles ◽  
Gas Adsorption ◽  
Polymer Gels ◽  
Pd Nanoparticles ◽  
Nitrogen Gas ◽  
Weight Percentage ◽  
Vinyl Polymer ◽  
Polymeric Supports

Four vinyl polymer gels (VPGs) were synthesized by free radical polymerization of divinylbenzene, ethane-1,2-diyl dimethacrylate, and copolymerization of divinylbenzene with styrene, and ethane-1,2-diyl dimethacrylate with methyl methacrylate, as supports for palladium nanoparticles. VPGs obtained from divinylbenzene and from divinylbenzene with styrene had spherical shapes while those obtained from ethane-1,2-diyl dimethacrylate and from ethane-1,2-diyl dimethacrylate with methyl methacrylate did not have any specific shapes. Pd(OAc)2 was impregnated onto VPGs and reduced to form Pd0 nanoparticles within VPGs. The structures of Pd0-loaded VPGs were analyzed by XRD, TEM, and nitrogen gas adsorption. Pd0-loaded VPGs had nanocrystals of Pd0 within and on the surface of the polymeric supports. Pd0/VPGs efficiently catalyzed the oxidation/disproportionation of benzyl alcohol into benzaldehyde/toluene, where activity and selectivity between benzaldehyde and toluene varied, depending on the structure of VPG and the weight percentage loading of Pd0. The catalysts were stable and Pd leaching to liquid phase did not occur. The catalysts were separated and reused for five times without any significant decrease in the catalytic activity.

Pd nanoparticles stabilized with phosphine-functionalized porous ionic polymer for efficient catalytic hydrogenation of nitroarenes in water

2020 ◽  
Vol 44 (9) ◽  
pp. 3681-3689 ◽  
Author(s):  
Yizhu Lei ◽  
Zaifei Chen ◽  
Guosong Lan ◽  
Renshu Wang ◽  
Xiao-Yu Zhou
Keyword(s):  
Catalytic Activity ◽  
Catalytic Hydrogenation ◽  
Palladium Nanoparticles ◽  
Pd Nanoparticles ◽  
Catalytic Performance ◽  
High Catalytic Activity ◽  
Ionic Polymer ◽  
Electron Donation ◽  
Nano Size ◽  
Excellent Catalytic Performance

Small palladium nanoparticles stabilized with phosphine-functionalized PIP displayed high catalytic activity for nitroarenes hydrogenation. Nano-size Pd particles, electron-donation effect of phosphine ligand, and surface wettability account for its excellent catalytic performance.

Palladium Supported on Mesoporous Silica via a Two-Step Method as an Efficient Catalyst for Suzuki-Miyaura Coupling Reactions

2014 ◽  
Vol 1035 ◽  
pp. 89-95
Author(s):  
Pei Yu Wang ◽  
Guo Heng Zhang ◽  
Hai Yan Jiao ◽  
Xiao Ping Zheng
Keyword(s):  
Catalytic Activity ◽  
Hydrothermal Synthesis ◽  
Palladium Nanoparticles ◽  
Reduction Method ◽  
Pd Nanoparticles ◽  
Coupling Reactions ◽  
Step Method ◽  
Efficient Catalyst ◽  
Catalytic Activities ◽  
Highly Dispersed

In this paper, palladium-containing SBA-15 (Pd/SBA-15) was synthesized via a two-step method. In this procedure, Pd nanoparticles of 3-5 nm in size have been synthesized by formalin reduction method and incorporated into mesoporous SBA-15 silica during hydrothermal synthesis. The resulting nanocomposite with 1.20 wt% Pd loading was achieved with highly dispersed and uniform palladium nanoparticles. The catalytic activity of the Pd/SBA-15 nanocomposite was used as a catalyst for the Suzuki-Miyaura coupling reactions. The Pd/SBA-15 nanocomposite exhibited excellent catalytic activities and reuse ability in air for the Suzuki-Miyaura coupling reactions.

Photochemically synthesized palladium nanoparticles with catalytic activity at ppb levels for C–C coupling reactions

RSC Advances ◽  
2015 ◽  
Vol 5 (87) ◽  
pp. 71253-71258 ◽  
Author(s):  
Abhijit Paul ◽  
Debnath Chatterjee ◽  
Rajkamal Rajkamal ◽  
Srirupa Banerjee ◽  
Somnath Yadav
Keyword(s):  
Catalytic Activity ◽  
Palladium Nanoparticles ◽  
Pd Nanoparticles ◽  
Photochemical Synthesis ◽  
Coupling Reactions ◽  
Catalytically Active

Herein we report a photochemical synthesis of Pd nanoparticles (Pd-NPs) that are catalytically active at 83 ppb for various C–C coupling reactions.

Core–shell microgels as thermoresponsive carriers for catalytic palladium nanoparticles

Soft Matter ◽  
2020 ◽  
Vol 16 (23) ◽  
pp. 5422-5430 ◽  
Author(s):  
Viktor Sabadasch ◽  
Lars Wiehemeier ◽  
Tilman Kottke ◽  
Thomas Hellweg
Keyword(s):  
Catalytic Activity ◽  
Palladium Nanoparticles ◽  
Pd Nanoparticles ◽  
Core Shell ◽  
The Core ◽  
Isopropyl Acrylamide ◽  
Nanoparticle Stabilization

Responsive non-N-isopropyl acrylamide (non-NIPMA) based core–shell microgels are promising carriers for Pd nanoparticles. The core contains COOH groups to achieve better nanoparticle stabilization. The shell provides control of the catalytic activity.

Synthesis and characterization of a host (a new thiol based dendritic polymer)–guest (Pd nanoparticles) nanocomposite material: an efficient and reusable catalyst for C–C coupling reactions

RSC Advances ◽  
2016 ◽  
Vol 6 (106) ◽  
pp. 104608-104619 ◽  
Author(s):  
Maryam Zakeri ◽  
Majid Moghadam ◽  
Valiollah Mirkhani ◽  
Shahram Tangestaninejad ◽  
Iraj Mohammadpoor-Baltork ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Palladium Nanoparticles ◽  
Pd Nanoparticles ◽  
Nanocomposite Material ◽  
Synthesis And Characterization ◽  
Reusable Catalyst ◽  
Coupling Reactions ◽  
Nano Silica ◽  
Dendritic Polymer

The catalytic activity of a new thiol based dendritic polymer immobilized on nano silica containing palladium nanoparticles was studied in C–C coupling reactions.

scholarly journals Influence of graphene oxide supports on solution-phase catalysis of thiolate-protected palladium nanoparticles in water

2017 ◽  
Vol 41 (1) ◽  
pp. 177-183 ◽  
Author(s):  
Vivian Chen ◽  
Hanqing Pan ◽  
Roxanne Jacobs ◽  
Shahab Derakhshan ◽  
Young-Seok Shon
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Palladium Nanoparticles ◽  
Colloidal Stability ◽  
Pd Nanoparticles ◽  
Solution Phase ◽  
Oxide Supports ◽  
Surface Ligands

The colloidal stability and catalytic activity of Pd nanoparticles are affected by the presence of graphene oxide and surface ligands.

scholarly journals Facile synthesis of palladium nanoparticles on hierarchical hollow silica spheres and its catalytic properties in Suzuki-reaction

2018 ◽  
Vol 5 (9) ◽  
pp. 180545 ◽  
Author(s):  
Mao Liu ◽  
Liuli Wu ◽  
Jianjie Han ◽  
Xiuhong Xu ◽  
Chengyuan He ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Palladium Nanoparticles ◽  
Catalytic Properties ◽  
Suzuki Reaction ◽  
Pd Nanoparticles ◽  
High Catalytic Activity ◽  
Silica Spheres ◽  
Facile Synthesis ◽  
Hollow Silica ◽  
Hollow Silica Spheres

A novel well-dispersed Pd@HHSS catalyst was synthesized by reduction of Pd(OAc) 2 immobilized on HHSS we reported. When the ratios of Pd/SiO 2 were 5 : 100 and 10 : 100, the Pd nanoparticles size was about 5–10 nm. The Pd@HHSS catalyst (Pd/SiO 2 = 10 : 100) showed high catalytic activity in Suzuki-reaction with yields of 91–99% and the catalyst is reusable after four successive cycles without obvious loss of catalytic activity.

Enhanced catalytic activity of palladium nanoparticles confined inside porous carbon in methanol electro-oxidation

2015 ◽  
Vol 17 (3) ◽  
pp. 1572-1580 ◽  
Author(s):  
Abheek Datta ◽  
Sutanu Kapri ◽  
Sayan Bhattacharyya
Keyword(s):  
Catalytic Activity ◽  
Porous Carbon ◽  
Palladium Nanoparticles ◽  
Oxidation Reaction ◽  
Pd Nanoparticles ◽  
Redox Properties ◽  
Electro Oxidation

The confinement of Pd nanoparticles inside porous carbon leads to enhanced redox properties and high reusability in methanol electro-oxidation reaction.

Palladium nanoparticles supported on a carbazole functionalized mesoporous organic polymer: synthesis and their application as efficient catalysts for the Suzuki–Miyaura cross coupling reaction

2017 ◽  
Vol 8 (9) ◽  
pp. 1488-1494 ◽  
Author(s):  
Hui Zhou ◽  
Chuanguang Wu ◽  
Qiaolin Wu ◽  
Bixuan Guo ◽  
Wanting Liu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Palladium Nanoparticles ◽  
High Performance ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Pd Nanoparticles ◽  
Polymer Synthesis ◽  
Organic Polymer ◽  
Cross Coupling Reaction ◽  
Good Catalytic Activity

Pd nanoparticles supported on a carbazole functionalized mesoporous organic polymer exhibit high performance in the Suzuki–Miyaura cross coupling reaction with good catalytic activity, substrate adaptability and recyclability.

Influence of intramolecular interactions on carbon dioxide gas adsorption capacity in Mesoporous Imine polymers

2018 ◽  
Author(s):  
Jaya Prakash Madda ◽  
Pilli Govindaiah ◽  
Sushant Kumar Jena ◽  
Sabbhavat Krishna ◽  
Rupak Kishor
Keyword(s):  
Carbon Dioxide ◽  
Adsorption Capacity ◽  
Density Functional ◽  
Gas Adsorption ◽  
Ambient Pressure ◽  
Condensation Reaction ◽  
Intramolecular Interactions ◽  
Carbon Dioxide Adsorption ◽  
Nitrogen Gas ◽  
Adsorption Characteristic

<p>Covalent organic Imine polymers with intrinsic meso-porosity were synthesized by condensation reaction between 4,4-diamino diphenyl methane and (para/meta/ortho)-phthaladehyde. Even though these polymers were synthesized from precursors of bis-bis covalent link mode, the bulk materials were micrometer size particles with intrinsic mesoporous enables nitrogen as well as carbon dioxide adsorption in the void spaces. These polymers were showed stability up to 260<sup>o</sup> centigrade. Nitrogen gas adsorption capacity up to 250 cc/g in the ambient pressure was observed with type III adsorption characteristic nature. Carbon dioxide adsorption experiments reveal the possible terminal amine functional group to carbamate with CO<sub>2</sub> gas molecule to the polymers. One of the imine polymers, COP-3 showed more carbon dioxide sorption capacity and isosteric heat of adsorption (Q<sub>st</sub>) than COP-1 and COP-2 at 273 K even though COP-3 had lower porosity for nitrogen gas than COP-1 and COP-2. We explained the trends in gas adsorption capacities and Qst values as a consequence of the intra molecular interactions confirmed by Density Functional Theory computational experiments on small molecular fragments.</p>

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