Highly dispersed platinum nanoparticles generated in viologen micelles with high catalytic activity and stability

2013 ◽  
Vol 1 (39) ◽  
pp. 12206 ◽  
Author(s):  
Gui-Qi Gao ◽  
Ling Lin ◽  
Cong-Min Fan ◽  
Qing Zhu ◽  
Rui-Xia Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Platinum Nanoparticles ◽  
High Catalytic Activity ◽  
Highly Dispersed

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 Platinum Nanoparticles Immobilized on Spherical Polyelectrolyte Brushes

Langmuir ◽  
2005 ◽  
Vol 21 (26) ◽  
pp. 12229-12234 ◽  
Author(s):  
Yu Mei ◽  
Geeta Sharma ◽  
Yan Lu ◽  
Matthias Ballauff ◽  
Markus Drechsler ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Platinum Nanoparticles ◽  
High Catalytic Activity ◽  
Polyelectrolyte Brushes ◽  
Spherical Polyelectrolyte Brushes

Ultrafine and highly dispersed platinum nanoparticles confined in a triazinyl-containing porous organic polymer for catalytic applications

Nanoscale ◽  
2018 ◽  
Vol 10 (45) ◽  
pp. 21466-21474 ◽  
Author(s):  
Hong Zhao ◽  
Guiqin Yu ◽  
Man Yuan ◽  
Jin Yang ◽  
Dan Xu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Selective Hydrogenation ◽  
Platinum Nanoparticles ◽  
Pt Nanoparticles ◽  
Organic Polymer ◽  
Catalytic Hydrolysis ◽  
Porous Organic Polymer ◽  
Highly Dispersed ◽  
Catalytic Applications ◽  
Hydrolysis Of

Highly dispersed ultrafine Pt nanoparticles were confined in a triazinyl-containing porous organic polymer for the catalytic hydrolysis of ammonia borane and the selective hydrogenation of halogenated nitrobenzenes with excellent catalytic activity.

scholarly journals Amorphous Alloy: Promising Precursor to Form Nanoflowerpot

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Guo Lan ◽  
Zhiqiang Xie ◽  
Zhenwei Huang ◽  
Shengchen Yang ◽  
Xuhai Zhang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Amorphous Alloy ◽  
Amorphous Alloys ◽  
High Catalytic Activity ◽  
Cu Alloy ◽  
Nanoporous Copper ◽  
Highly Dispersed ◽  
Oxidation Of Glucose

Nanoporous copper is fabricated by dealloying the amorphous Ti2Cu alloy in 0.03 M HF electrolyte. The pore and ligament sizes of the nanoporous copper can be readily tailored by controlling the dealloying time. The as-prepared nanoporous copper provides fine and uniform nanoflowerpots to grow highly dispersed Au nanoflowers. The blooming Au nanoflowers in the nanoporous copper flowerpots exhibit both high catalytic activity and stability towards the oxidation of glucose, indicating that the amorphous alloys are ideal precursors to form nanoflowerpot which can grow functional nanoflowers.

A novel silver nanoparticle embedded mesoporous polyaniline (mPANI/Ag) nanocomposite as a recyclable catalyst in the acylation of amines and alcohols under solvent free conditions

RSC Advances ◽  
2014 ◽  
Vol 4 (80) ◽  
pp. 42670-42681 ◽  
Author(s):  
Usha Mandi ◽  
Anupam Singha Roy ◽  
Biplab Banerjee ◽  
Sk. Manirul Islam
Keyword(s):  
Silver Nanoparticles ◽  
Acetic Acid ◽  
Catalytic Activity ◽  
Silver Nanoparticle ◽  
Solvent Free ◽  
Organic Polymer ◽  
High Catalytic Activity ◽  
Ag Nps ◽  
Solvent Free Conditions ◽  
Highly Dispersed

Highly dispersed silver nanoparticles (Ag NPs) have been embedded into a mesoporous organic polymer (mPANI) and the material showed high catalytic activity in the acylation of amines and alcohols using acetic acid.

scholarly journals Pt/CeO2 with residual chloride as reusable soft Lewis acid catalysts: application to highly efficient isomerization of allylic esters

2021 ◽  
Author(s):  
Qi-An Huang ◽  
Asahi Haruta ◽  
Yuhya Kumamoto ◽  
Haruno Murayama ◽  
Eiji Yamamoto ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Lewis Acid ◽  
High Catalytic Activity ◽  
Acid Catalysts ◽  
Lewis Acid Catalysts ◽  
X Ray ◽  
Solvent Free Conditions ◽  
Highly Dispersed ◽  
Silica Alumina ◽  
Allylic Esters

Abstract Heterogeneous acid and base catalysts play a crucial role in many important chemical processes. Hard Lewis and Brønsted acid catalysts like silica-alumina and zeolites have been widely applied in numerous reactions; however, developing reusable and active soft Lewis acid catalysts remain a challenge. Herein, we demonstrate for the first time that a highly dispersed supported platinum catalyst can act as a heterogeneous soft Lewis acid. High turnover numbers and reusability were observed in the isomerization of allylic esters under solvent-free conditions. Moreover, the as-prepared catalysts are characterized by X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) analyses, revealing that the highly dispersed Pt clusters with Pt–Cl bonds play a key role in the high activity. The residual chloride anion enhances the Lewis acidity of the Pt metal center and thus improves the catalytic activity. Simultaneously, the high catalytic activity of Pt/CeO2 with residual chloride and the soft Lewis acid mechanism are also proved by density functional theory (DFT) calculations based on the model reaction.

In situ synthesis of ultra-small platinum nanoparticles using a water soluble polyphenolic polymer with high catalytic activity

RSC Advances ◽  
2014 ◽  
Vol 4 (93) ◽  
pp. 51745-51753 ◽  
Author(s):  
Tanmoy Maji ◽  
Sanjib Banerjee ◽  
Mrinmoy Biswas ◽  
Tarun K. Mandal
Keyword(s):  
Catalytic Activity ◽  
Organic Solvent ◽  
Platinum Nanoparticles ◽  
In Situ Synthesis ◽  
Reduction Technique ◽  
Water Soluble ◽  
High Catalytic Activity

Ultra-small platinum nanoparticles are generated by in situ polymer reduction technique which shows high catalytic activity in water and in organic solvent.

scholarly journals Pt/Fe co-loaded mesoporous zeolite beta for CO oxidation with high catalytic activity and water resistance

RSC Advances ◽  
2019 ◽  
Vol 9 (48) ◽  
pp. 28089-28094 ◽  
Author(s):  
Qinru Li ◽  
Xiaoxia Zhou ◽  
Wanpeng Zhao ◽  
Chunlei Peng ◽  
Huixia Wu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ion Exchange ◽  
Ethylene Glycol ◽  
Co Oxidation ◽  
Water Resistance ◽  
Reduction Method ◽  
Zeolite Beta ◽  
High Catalytic Activity ◽  
Mesoporous Zeolite ◽  
Highly Dispersed

A series of Pt/Fe co-loaded mBeta catalysts with highly dispersed Pt species have been successfully prepared by an ion exchange and subsequent ethylene glycol reduction method, and show excellent catalytic activity and durability in CO oxidation.

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