CO2-in-PEG emulsion-templating synthesis of poly(acrylamide) with controllable porosity and their use as efficient catalyst supports

RSC Advances ◽  
2016 ◽  
Vol 6 (63) ◽  
pp. 58182-58187 ◽  
Author(s):  
Zhimin Xue ◽  
Weihong Chang ◽  
Yan Cheng ◽  
Jing Liu ◽  
Jian Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogenation Reaction ◽  
Catalyst Supports ◽  
Benzene Hydrogenation ◽  
High Catalytic Activity ◽  
Efficient Catalyst ◽  
Emulsion Templating ◽  
Templating Synthesis ◽  
Porous Poly ◽  
Poly Acrylamide

Porous poly(acrylamide)s nanoparticles prepared from CO2-in-PEG emulsions have high catalytic activity for benzene hydrogenation reaction.

Mussel-inspired construction of thermo-responsive double-hydrophilic diblock copolymers-decorated reduced graphene oxide as effective catalyst supports for highly dispersed superfine Pd nanoparticles

Nanoscale ◽  
2018 ◽  
Vol 10 (26) ◽  
pp. 12487-12496 ◽  
Author(s):  
Haichao Duan ◽  
Yu Yang ◽  
Jianhua Lü ◽  
Changli Lü
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Reduced Graphene Oxide ◽  
Diblock Copolymer ◽  
Diblock Copolymers ◽  
Pd Nanoparticles ◽  
Catalyst Supports ◽  
High Catalytic Activity ◽  
Reduced Graphene ◽  
Highly Dispersed

We report a facile, mussel-inspired construction of a thermo-responsive diblock copolymer-anchored rGO support for superfine PdNPs with high catalytic activity.

Nitrogen-enriched porous carbon supported Pd-nanoparticles as an efficient catalyst for the transfer hydrogenation of alkenes

2018 ◽  
Vol 42 (20) ◽  
pp. 16823-16828 ◽  
Author(s):  
Jie Li ◽  
Xin Zhou ◽  
Ning-Zhao Shang ◽  
Cheng Feng ◽  
Shu-Tao Gao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Porous Carbon ◽  
Pd Nanoparticles ◽  
Transfer Hydrogenation ◽  
High Catalytic Activity ◽  
Efficient Catalyst ◽  
Supported Pd

Well-dispersed Pd nanoparticles supported on nitrogen-enriched porous carbon were prepared and this material displayed excellent catalytic activity for the transfer hydrogenation of alkenes. The Pd@NPC catalyst exhibited high catalytic activity and stability for the hydrogenation of alkenes.

Silica Gel Supported Dual Acidic Ionic Liquid as a Recyclable and Efficient Catalyst for Esterification and Acetalization Reactions

2011 ◽  
Vol 233-235 ◽  
pp. 1336-1339 ◽  
Author(s):  
Qiang Zhang ◽  
Hong Su ◽  
Jun Luo
Keyword(s):  
Ionic Liquid ◽  
Catalytic Activity ◽  
Silica Gel ◽  
Covalent Bond ◽  
High Catalytic Activity ◽  
The Novel ◽  
Hydrogen Sulfate ◽  
Efficient Catalyst ◽  
Acidic Ionic Liquid

A supported dual acidic ionic liquid was prepared via anchoring 3-sulfobutyl-1-(3-propyltriethoxysilane) imidazolium hydrogen sulfate onto common silica gel by covalent bond. The novel immobilized acidic ionic liquid illustrated high catalytic activity in esterification and acetalization reactions. The products could be separated by simple decantation and the recovered catalyst could be recycled without remarkable loss of catalytic activity even after eight runs for esterification and six runs for acetalization.

scholarly journals Pd On Thermo-Responsive Composite of Silica-Coated Carbon Nanotube And 1-Vinyl-3-Butylimidazolium-Based Ionic Liquid Copolymers As An Efficient Catalyst For Hydrogenation of Nitro Compounds

2021 ◽  
Author(s):  
Samahe Sadjadi ◽  
Neda Abedian-Dehaghani ◽  
Majid M. Heravi
Keyword(s):  
Ionic Liquid ◽  
Catalytic Activity ◽  
Aqueous Media ◽  
Nitro Compounds ◽  
Solution Temperature ◽  
High Catalytic Activity ◽  
Impregnation Method ◽  
Efficient Catalyst ◽  
Wet Impregnation ◽  
Coated Carbon

Abstract In this work, an ionic liquid-containing thermo-responsive heterogeneous catalyst with utility for promoting hydrogenation of nitro-compounds in aqueous media is developed. To prepare the catalyst, silica-coated carbon nanotubes were synthesized and vinyl-functionalized. The resulted compound was then polymerized with 1-viny-3-butylimidazolium bromide and N-isopropylacrylamide. The obtained ionic liquid-containing thermo-responsive composite was palladated via wet-impregnation method to give the final catalyst. Study of the performance of the catalyst confirmed high catalytic activity of the catalyst at temperature above the lower critical solution temperature. Furthermore, the catalyst was highly recyclable and showed negligible Pd leaching upon recycling. Broad substrate scope and selectivity of the catalyst towards reduction of nitro functionality were also confirmed. Furthermore, hot filtration test implied the heterogeneous nature of the catalysis. The comparison of the activity of Pd/CNT-P with some control catalysts approved the importance of hybridization of P and CNT and the presence of ionic liquid for the catalytic activity.

Ultrafine bimetallic Pt–Ni nanoparticles immobilized on 3-dimensional N-doped graphene networks: a highly efficient catalyst for dehydrogenation of hydrous hydrazine

2019 ◽  
Vol 7 (1) ◽  
pp. 112-115 ◽  
Author(s):  
Amit Kumar ◽  
Xinchun Yang ◽  
Qiang Xu
Keyword(s):  
Catalytic Activity ◽  
Reduction Method ◽  
Chemical Reduction ◽  
High Catalytic Activity ◽  
Ni Nanoparticles ◽  
Chemical Reduction Method ◽  
Efficient Catalyst ◽  
3 Dimensional ◽  
Doped Graphene ◽  
Wet Chemical

Ultrafine and uniformly dispersed bimetallic Pt–Ni nanoparticles (NPs) have been immobilized on novel 3-dimensional N-doped graphene networks (NGNs) by a facile wet chemical reduction method, which exhibit extremely high catalytic activity for the dehydrogenation of hydrazine hydrate.

scholarly journals Palladium nanoparticles supported on nitrogen doped porous carbon material derived from cyclodextrin, glucose and melamine based polymer: promising catalysts for hydrogenation reactions

2020 ◽  
Vol 92 (6) ◽  
pp. 827-837 ◽  
Author(s):  
Samahe Sadjadi ◽  
Masoumeh Malmir ◽  
Bastien Léger ◽  
Eric Monflier ◽  
Majid M. Heravi
Keyword(s):  
Catalytic Activity ◽  
Palladium Nanoparticles ◽  
Aqueous Media ◽  
Hydrogenation Reaction ◽  
Molar Ratio ◽  
Porous Carbon Material ◽  
High Catalytic Activity ◽  
Hydrothermal Conditions ◽  
Nitrogen Doped ◽  
Hydrogenation Reactions

AbstractMelamine based polymer (MT) was prepared and then reacted with a mixture of glucose (Glu) and β-cyclodextrin (CD) under hydrothermal conditions to afford, MT/Glu-CD. Then, the adsorption of Pd salt was realized on MT/Glu-CD. The resulting compound was subsequently carbonized to furnish Pd/MT/C that exhibited high catalytic activity for the hydrogenation of nitroarenes in aqueous media. To elucidate the roles of CD, Glu, the molar ratio of Glu:CD and the carbonization in the catalytic activity, several control catalysts have been prepared and their performances for a model hydrogenation reaction were compared with that of Pd/MT/C. The results confirmed the importance of the carbonization as well as the presence of CD for achieving high catalytic activity. Moreover, it was found that the molar ratio of Glu:CD could affect the catalytic activity of the final catalyst and the optimum molar ratio of Glu:CD was 30:70. The recycling test as well as measurement of Pd leaching demonstrated high recyclability and low Pd leaching of Pd/MT/C.

Pd/Indanone-Based Ligands: An Efficient Catalyst System for Ullmann­-Type, Suzuki–Miyaura, and Mizoroki–Heck Cross-Coupling Reactions with Aryl Tosylates and Aryl Halides

Synthesis ◽  
2017 ◽  
Vol 49 (18) ◽  
pp. 4372-4382 ◽  
Author(s):  
Mohammed Waheed ◽  
Naseem Ahmed
Keyword(s):  
Catalytic Activity ◽  
Cross Coupling ◽  
Catalyst System ◽  
Aryl Halides ◽  
Maximum Efficiency ◽  
High Catalytic Activity ◽  
Coupling Reactions ◽  
Efficient Catalyst ◽  
Cross Coupling Reactions ◽  
Aryl Tosylates

2-Hydroxyindan-1-ones have been efficiently synthesized and successfully applied as ligands in Pd-catalyzed Ullmann type, Suzuki–Miyaura, and Mizoroki–Heck cross-coupling reactions with aryl tosylates and aryl halides. The ligands are air- and moisture-stable and have shown high catalytic activity with Pd(OAc)2 in these cross-coupling reactions. The system tolerates a variety of functional groups in the product and can be re-used at least three times with maximum efficiency.

scholarly journals Facile Synthesis and Characterization of Palladium@Carbon Catalyst for the Suzuki-Miyaura and Mizoroki-Heck Coupling Reactions

2021 ◽  
Vol 11 (11) ◽  
pp. 4822
Author(s):  
Hamed M. Alshammari ◽  
Obaid F. Aldosari ◽  
Mohammad Hayal Alotaibi ◽  
Raja L. Alotaibi ◽  
Mosaed S. Alhumaimess ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Activated Carbon ◽  
Coupling Reaction ◽  
Aryl Halides ◽  
High Catalytic Activity ◽  
Coupling Reactions ◽  
Heck Coupling ◽  
Efficient Catalyst ◽  
X Ray ◽  
Suzuki Reactions

Palladium-based carbon catalysts (Pd/C) can be potentially applied as an efficient catalyst for Suzuki–Miyaura and Mizoroki–Heck coupling reactions. Herein, a variety of catalysts of palladium on activated carbon were prepared by varying the content of ‘Pd’ via an in situ reduction method, using hydrogen as a reducing agent. The as-prepared catalysts (0.5 wt % Pd/C, 1 wt % Pd/C, 2 wt % Pd/C and 3 wt % Pd/C) were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and Brunauer–Emmett–Teller (BET) analyses. The catalysts were tested as a coupling catalyst for Suzuki–Miyaura coupling reactions involving aryl halides and phenyl boronic acid. The optimization of the catalyst by varying the palladium content on the activated carbon yielded Pd/C catalysts with very high catalytic activity for Suzuki reactions of aryl halides and a Mizoroki–Heck cross-coupling reaction of 4-bromoanisol and acrylic acid in an aqueous medium. A high ‘Pd’ content and uniform ‘Pd’ impregnation significantly affected the activity of the catalysts. The catalytic activity of 3% Pd/C was found to make it a more efficient catalyst when compared with the other synthesized Pd/C catalysts. Furthermore, the catalyst reusability was also tested for Suzuki reactions by repeatedly performing the same reaction using the recovered catalyst. The 3% Pd/C catalyst displayed better reusability even after several reactions.

Sulfonic acid-functionalized mesoporous carbon/silica as efficient catalyst for dehydration of fructose into 5-hydroxymethylfurfural

RSC Advances ◽  
2016 ◽  
Vol 6 (103) ◽  
pp. 101526-101534 ◽  
Author(s):  
Xiaoning Tian ◽  
Zhongqing Jiang ◽  
Yingying Jiang ◽  
Weitong Xu ◽  
Chenxu Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Sulfonic Acid ◽  
Mesoporous Carbon ◽  
High Catalytic Activity ◽  
Efficient Catalyst ◽  
Silica Materials

Sulfonic acid-functionalized mesoporous carbon/silica materials have been used as catalysts for the catalytic dehydration of fructose into 5-hydroxymethylfurfural, and show high catalytic activity.

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