Carbon Supported Hybrid Catalysts for Controlled Product Selectivity in the Hydrosilylation of Alkynes

2021 ◽  
Author(s):  
Max Roemer ◽  
Vinicius Romero Gonçales ◽  
Sinead Teresa Keaveney ◽  
Indrek Pernik ◽  
Jiaxin Lian ◽  
...  
Keyword(s):  
Carbon Black ◽  
Product Selectivity ◽  
Hybrid Catalysts

A series of Rh- and Ir-hybrid catalysts with varying tether lengths has been prepared by immobilization of RhI, RhIII and IrIII complexes on carbon black via radical grafting. The performance...

Engineering Regioselectivity in the Hydrosilylation of Alkynes using Heterobimetallic Dual-Functional Hybrid Catalysts

2021 ◽  
Author(s):  
Max Roemer ◽  
Sinead Teresa Keaveney ◽  
Vinicius Romero Gonçales ◽  
Jiaxin Lian ◽  
James Downes ◽  
...  
Keyword(s):  
Carbon Black ◽  
Synthesis And Characterization ◽  
Hybrid Catalysts ◽  
Dual Functional ◽  
Heterobimetallic Catalysts

The synthesis and characterization of carbon black supported rhodium and iridium heterobimetallic catalysts, termed hybrid catalysts, and their application in the hydrosilylation of alkynes is described. An aryl diazonium grafting...

The advantages of covalently attaching organometallic catalysts to a carbon black support: recyclable Rh(i) complexes that deliver enhanced conversion and product selectivity

2015 ◽  
Vol 44 (17) ◽  
pp. 7917-7926 ◽  
Author(s):  
Andrey A. Tregubov ◽  
D. Barney Walker ◽  
Khuong Q. Vuong ◽  
J. Justin Gooding ◽  
Barbara A. Messerle
Keyword(s):  
Carbon Black ◽  
Coordination Complex ◽  
Product Selectivity ◽  
Hybrid Catalyst ◽  
Organometallic Catalysts

A bidentate Rh(i) coordination complex was covalently anchored to a carbon black support. The resultant hybrid catalyst was found to be active for both hydroamination and dihydroalkoxylation reactions and was readily recycled.

scholarly journals A versatile method for the preparation of carbon–rhodium hybrid catalysts on graphene and carbon black

2016 ◽  
Vol 7 (3) ◽  
pp. 1996-2004 ◽  
Author(s):  
Chin Min Wong ◽  
D. Barney Walker ◽  
Alexander H. Soeriyadi ◽  
J. Justin Gooding ◽  
Barbara A. Messerle
Keyword(s):  
Carbon Black ◽  
Hydrosilylation Reaction ◽  
Highly Efficient ◽  
Rapid Access ◽  
Hybrid Catalysts

A direct and rapid access to highly efficient and recyclable carbon–rhodium hybrid catalysts for the hydrosilylation reaction is presented.

An easy route to prepare carbon black–silver hybrid catalysts for electro-catalytic oxidation of hydrazine

2009 ◽  
Vol 63 (12) ◽  
pp. 969-971 ◽  
Author(s):  
Chang Tan ◽  
Feng Wang ◽  
Jingjun Liu ◽  
Yongbin Zhao ◽  
Jianjun Wang ◽  
...  
Keyword(s):  
Carbon Black ◽  
Catalytic Oxidation ◽  
Hybrid Catalysts ◽  
Electro Catalytic Oxidation

A Preparation of High Resolution Standards for Electron Microscopy. Part II

1971 ◽  
Vol 29 ◽  
pp. 160-161
Author(s):  
Akira Tanaka ◽  
David F. Harling
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Carbon Black ◽  
Single Crystal ◽  
Dark Field ◽  
Graphitized Carbon Black ◽  
Graphitized Carbon ◽  
Dark Field Imaging ◽  
Crystal Films ◽  
Micro Holes

In the previous paper, the author reported on a technique for preparing vapor-deposited single crystal films as high resolution standards for electron microscopy. The present paper is intended to describe the preparation of several high resolution standards for dark field microscopy and also to mention some results obtained from these studies. Three preparations were used initially: 1.) Graphitized carbon black, 2.) Epitaxially grown particles of different metals prepared by vapor deposition, and 3.) Particles grown epitaxially on the edge of micro-holes formed in a gold single crystal film.The authors successfully obtained dark field micrographs demonstrating the 3.4Å lattice spacing of graphitized carbon black and the Au single crystal (111) lattice of 2.35Å. The latter spacing is especially suitable for dark field imaging because of its preparation, as in 3.), above. After the deposited film of Au (001) orientation is prepared at 400°C the substrate temperature is raised, resulting in the formation of many square micro-holes caused by partial evaporation of the Au film.

Extraction and identification of fillers and pigments from pyrolyzed rubber and tire samples

1996 ◽  
Vol 54 ◽  
pp. 174-175
Author(s):  
P. Sadhukhan ◽  
J. B. Zimmerman
Keyword(s):  
Zinc Oxide ◽  
Electron Microscope ◽  
Carbon Black ◽  
Natural Rubber ◽  
Transmission Electron Microscope ◽  
Rolling Resistance ◽  
Synthetic Polymers ◽  
Nitrogen Atmosphere ◽  
Transmission Electron ◽  
Curing Agents

Rubber stocks, specially tires, are composed of natural rubber and synthetic polymers and also of several compounding ingredients, such as carbon black, silica, zinc oxide etc. These are generally mixed and vulcanized with additional curing agents, mainly organic in nature, to achieve certain “designing properties” including wear, traction, rolling resistance and handling of tires. Considerable importance is, therefore, attached both by the manufacturers and their competitors to be able to extract, identify and characterize various types of fillers and pigments. Several analytical procedures have been in use to extract, preferentially, these fillers and pigments and subsequently identify and characterize them under a transmission electron microscope.Rubber stocks and tire sections are subjected to heat under nitrogen atmosphere to 550°C for one hour and then cooled under nitrogen to remove polymers, leaving behind carbon black, silica and zinc oxide and 650°C to eliminate carbon blacks, leaving only silica and zinc oxide.

Sign in / Sign up

Export Citation Format

Share Document