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Related Concept Videos

Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
Ziegler–Natta Chain-Growth Polymerization: Overview01:17

Ziegler–Natta Chain-Growth Polymerization: Overview

Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta catalyst, high molecular...
Heterogeneous Catalysis01:22

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation02:24

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...

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Related Experiment Video

Updated: May 8, 2026

Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
10:39

Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction

Published on: August 23, 2018

Rheological Pathways to a Scalable Ruthenium Nuclei-Anchored Carbon Fiber Catalyst.

Ga-Hyeun Lee1, Seok-Jin Kim2, Jung-Eun Lee1

  • 1School of Material Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.

ACS Nano
|May 7, 2026
PubMed
Summary
This summary is machine-generated.

We developed a rapid spinning method to create uniform, fiber-based ruthenium electrocatalysts. This scalable technique enables efficient nanoconfinement for advanced energy applications.

Keywords:
carbon fibermetal nanoconfinementpolymer−metal nanocompositerheological optimizationtextile catalyst

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Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Carbon fiber electrocatalysts offer superior performance over powder forms due to enhanced conductivity and stability.
  • Scalable manufacturing methods are crucial for transitioning advanced catalysts from lab to industry.

Purpose of the Study:

  • To develop a rapid, scalable method for producing uniform carbon-supported metal electrocatalysts in fibrous forms.
  • To demonstrate the feasibility of roll-to-roll manufacturing for fabric electrocatalysts.
  • To investigate the mechanism of nanoconfinement and microstructural evolution for enhanced performance.

Main Methods:

  • Spinning of polyacrylonitrile (PAN)-ruthenium (Ru) phenanthroline complexes into fibers.
  • Annealing at 1200 °C to control Ru particle size distribution.
  • Carbonization and oxygen plasma treatment to study microstructural evolution.

Main Results:

  • Achieved uniform ruthenium nanoparticle-loaded carbon fibers with controlled particle size.
  • Demonstrated rheological control and monodisperse Ru confinement via Ru complex interaction with PAN's nitrile groups.
  • Observed exceptional performance enhancement in Ru-embedded carbon fabric electrocatalysts.

Conclusions:

  • The rheology-driven spinning protocol successfully bridges lab-scale synthesis and industrial manufacturing of fabric electrocatalysts.
  • This versatile platform provides critical insights into metal-polymer nanocomposite structural evolution.
  • The developed method offers a pathway for next-generation energy applications requiring advanced electrocatalysts.