Pd nanoparticles supported on hierarchically porous carbons derived from assembled nanoparticles of a zeolitic imidazolate framework (ZIF-8) for methanol electrooxidation

2015 ◽  
Vol 51 (54) ◽  
pp. 10827-10830 ◽  
Author(s):  
Jun Li ◽  
Qi-Long Zhu ◽  
Qiang Xu
Keyword(s):  
Catalytic Activity ◽  
Pd Nanoparticles ◽  
Methanol Electrooxidation ◽  
High Catalytic Activity ◽  
Porous Carbons ◽  
Zeolitic Imidazolate Framework ◽  
Hierarchically Porous

Pd nanoparticles supported on hierarchically porous carbons prepared by carbonization of assembled ZIF-8 nanoparticles at 1000 °C display an extremely high catalytic activity for methanol electrooxidation.

Facile preparation of a hierarchically porous metal–organic nanocomposite with excellent catalytic performance

RSC Advances ◽  
2016 ◽  
Vol 6 (99) ◽  
pp. 97399-97403 ◽  
Author(s):  
Rui Kuang ◽  
Luyi Zheng ◽  
Ethan Cottrill ◽  
Ning Pan ◽  
Yanhui Chi ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Aging Process ◽  
Porous Metal ◽  
Catalytic Performance ◽  
High Catalytic Activity ◽  
Hierarchically Porous ◽  
Hierarchical Porous ◽  
Metal Organic ◽  
Facile Preparation ◽  
Excellent Catalytic Performance

A hierarchical porous MOF nanocrystal, hpCuL (L = 2,4,6-tris(3,5-dicarboxylatephenylamino)-1,3,5-triazine) was prepared via a facile gel-aging process. This nanocomposite exhibits high catalytic activity and stability for the reduction of 4-nitrophenol.

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.

High Catalytic Activity of Pd Nanoparticles Synthesized from Green Alga Chlorella vulgaris in Buchwald-hartwig Synthesis of N-Aryl Piperazines

2019 ◽  
Vol 7 (1) ◽  
pp. 23-33
Author(s):  
Vaibhav Mishra ◽  
Anju Arya ◽  
Tejpal Singh Chundawat
Keyword(s):  
Catalytic Activity ◽  
Green Alga ◽  
Chlorella Vulgaris ◽  
Direct Synthesis ◽  
Coupling Reaction ◽  
Pd Nanoparticles ◽  
High Catalytic Activity ◽  
Pd Nanoparticle ◽  
Green Algal ◽  
Green Alga Chlorella

Background: The N-aryl piperazines are an important component of many drug products used for the treatment of malaria, depression, anxiety and Parkinson diseases. Buchwald-Hartwig amination is the latest and well-known reaction for Pd catalyzed direct synthesis of N-aryl piperazine from aryl halides. Although several Pd-ligand systems have already been discovered for this conversion, Pd nanoparticles are recently being used for this useful coupling reaction due to their recyclability and durability. Metal nanoparticles show enhanced catalytic activity compared to their bulk counterparts due to increased surface area at the edges and corners. The use of green algal extract in place of chemical ligands makes this process more environment-friendly and cost-effective. In this research, Pd nanoparticles synthesized using green alga C. Vulgaris were utilized as an alternative approach for the coupling reaction during the preparation of N-aryl piperazines. Methods: Synthesized Pd nanoparticles from C. Vulgaris were characterized by FTIR, SEM and XRD techniques. The catalytic activity of the synthesized nanoparticles was monitored for the synthesis of N-aryl piperazines by Buchwald-Hartwig reaction. The synthesized N-aryl piperazines were characterized by NMR, FTIR and mass analysis. Results: A very good catalytic activity of the synthesized Pd nanoparticles from green alga Chlorella vulgaris extract was observed. The green alga not only reduces the size of the Pd metal to nanoparticles but also acts as a green ligand for reduction of Pd(II) to Pd(0) during nanoparticle synthesis. Using this Pd nanoparticles-green ligand system, several N-aryl piperazines were synthesized in good to excellent yields. Reaction conditions for better conversion were optimized. The comparative advantage of the catalytic system with recently published works on Buchwald-Hartwig C-N coupling reaction is given. Recyclability and durability of the catalyst were explored and the results were found to be promising. A plausible mechanism of Pd nanoparticle catalyzed reaction is also proposed. Conclusion: Catalytic activity of the Pd nanoparticle synthesized from Chlorella vulagris in the synthesis of N-aryl piperazines by Buchwald-Hartwig reaction is reported first time to the best of our knowledge and understanding. The green approach of Pd catalyst to facilitate the reaction and its environmental impact is the main characteristic of the process.

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.

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.

Covalently functionalized carbon nanotube supported Pd nanoparticles for catalytic reduction of 4-nitrophenol

Nanoscale ◽  
2014 ◽  
Vol 6 (12) ◽  
pp. 6609-6616 ◽  
Author(s):  
Xianmo Gu ◽  
Wei Qi ◽  
Xianzhu Xu ◽  
Zhenhua Sun ◽  
Liyun Zhang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Activity ◽  
Carbon Nanotube ◽  
Catalytic Reduction ◽  
Cycloaddition Reaction ◽  
Pd Nanoparticles ◽  
Dipolar Cycloaddition ◽  
High Catalytic Activity ◽  
Pd Nanoparticle ◽  
Supported Pd

Carbon nanotubes (CNTs) were covalently functionalized via 1,3-dipolar cycloaddition reaction under microwave conditions. Then Pd nanoparticle/CNT nanocomposites were fabricated through strong electronic adsorption and H2 reduction, which exhibited high catalytic activity.

Hierarchically porous ternary Au/ZnO@ZIF-8 nanocomposite: spatial in situ Au encapsulation and catalytic activity for the reduction of p-nitrophenol

RSC Advances ◽  
2016 ◽  
Vol 6 (113) ◽  
pp. 112451-112454 ◽  
Author(s):  
Xiaokai Song ◽  
Hongzhao Sun ◽  
Xin Cao ◽  
Zhixian Wang ◽  
Dejian Zhao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Au Nanoparticles ◽  
High Catalytic Activity ◽  
Nucleation Process ◽  
Hierarchically Porous ◽  
Crystal Matrix

A ternary Au/ZnO@ZIF-8 nanocomposite was prepared through in situ Au nanoparticles encapsulation from the ZnO surface into the ZIF-8 crystal matrix during its nucleation process, which exhibited high catalytic activity for the reduction of p-nitrophenol.

Aligned Nanoporous Pt–Cu Bimetallic Microwires with High Catalytic Activity toward Methanol Electrooxidation

ACS Catalysis ◽  
2015 ◽  
Vol 5 (6) ◽  
pp. 3779-3785 ◽  
Author(s):  
H.-J. Qiu ◽  
X. Shen ◽  
J. Q. Wang ◽  
A. Hirata ◽  
T. Fujita ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Methanol Electrooxidation ◽  
High Catalytic Activity
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