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Related Concept Videos

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 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...
Catalysis02:50

Catalysis

The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
Catalysis01:27

Catalysis

Catalysis influences the rate of chemical reactions by providing an alternative reaction pathway with lower activation energy. A catalyst speeds up a reaction, but it is not consumed during the process. The fundamental principle of catalysis is the ability of a catalyst to alter the reaction mechanism, often introducing a more efficient pathway than the uncatalyzed process.In a catalyzed reaction, the catalyst participates directly in the reaction mechanism. It interacts with reactants to form...
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.
Pericyclic Reactions: Introduction01:17

Pericyclic Reactions: Introduction

Pericyclic reactions are organic reactions that occur via a concerted mechanism without generating any intermediates. The reactions proceed through the movement of electrons in a closed loop to form a cyclic transition state, where rearrangement of the σ and π bonds yields specific products.
Pericyclic reactions can be classified into three categories: electrocyclic reactions, cycloaddition reactions, and sigmatropic rearrangements. Electrocyclic reactions and sigmatropic rearrangements are...

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Updated: May 14, 2026

Utilization of Stop-flow Micro-tubing Reactors for the Development of Organic Transformations
13:09

Utilization of Stop-flow Micro-tubing Reactors for the Development of Organic Transformations

Published on: January 4, 2018

Nanostructured catalysts for organic transformations.

Leng Leng Chng1, Nandanan Erathodiyil, Jackie Y Ying

  • 1Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669.

Accounts of Chemical Research
|January 29, 2013
PubMed
Summary
This summary is machine-generated.

Nanostructured materials offer green and sustainable solutions for chemical transformations, enabling efficient catalysis with easy recovery. Future research focuses on developing stable, highly active, and enantioselective nanocatalysts for greener chemical processes.

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Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes
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Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes

Published on: June 24, 2022

HKUST-1 as a Heterogeneous Catalyst for the Synthesis of Vanillin
11:15

HKUST-1 as a Heterogeneous Catalyst for the Synthesis of Vanillin

Published on: July 23, 2016

Related Experiment Videos

Last Updated: May 14, 2026

Utilization of Stop-flow Micro-tubing Reactors for the Development of Organic Transformations
13:09

Utilization of Stop-flow Micro-tubing Reactors for the Development of Organic Transformations

Published on: January 4, 2018

Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes
12:08

Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes

Published on: June 24, 2022

HKUST-1 as a Heterogeneous Catalyst for the Synthesis of Vanillin
11:15

HKUST-1 as a Heterogeneous Catalyst for the Synthesis of Vanillin

Published on: July 23, 2016

Area of Science:

  • Green chemistry and sustainable catalysis
  • Nanomaterials science and engineering
  • Heterogeneous catalysis for organic synthesis

Background:

  • Developing green, sustainable, and economical chemical processes is a major challenge.
  • Nanostructured materials are promising heterogeneous catalysts for organic transformations, aligning with green chemistry principles.
  • Advances in synthesizing well-defined nanostructured materials allow for rational catalyst design.

Purpose of the Study:

  • To review recent advances in using nanostructured materials for catalytic organic transformations.
  • To highlight the development of nanostructured catalysts with controlled morphologies, magnetic nanocomposites, semiconductor-metal nanocomposites, and hybrid nanostructured catalysts.
  • To showcase principles of nanoparticle design for enhancing catalyst reactivity, selectivity, and recyclability.

Main Methods:

  • Review of recent research on nanostructured catalysts for various organic transformations.
  • Focus on specific types of nanostructured materials: controlled morphologies, magnetic nanocomposites, semiconductor-metal nanocomposites, and hybrid nanostructured catalysts.
  • Analysis of design principles, including control of nanoparticle structure, composition, and support interactions.

Main Results:

  • Nanostructured catalysts demonstrate enhanced reactivity, selectivity, and recyclability through rational design.
  • Various nanostructured materials are effective in diverse reactions like oxidations, reductions, hydrogenations, coupling, and C-H activations.
  • Key design principles involve controlling nanoparticle characteristics and support interactions.

Conclusions:

  • Nanostructured materials are attractive for green and sustainable catalysis due to their efficiency and recoverability.
  • Challenges remain in nanocatalysis, including stability (sintering, leaching) and enantioselectivity.
  • Future efforts should focus on designing multifunctional nanocomposite catalysts that are stable, active, and enantioselective for sustainable chemical technologies.