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Heterogeneous Catalysis

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...

Catalysis

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.

Catalysis

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 Alkenes: Asymmetric Catalytic Hydrogenation

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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...

Olefin Metathesis Polymerization: Overview

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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...

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

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.

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Updated: Jun 30, 2026

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks (MOFs)

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Published on: January 17, 2020

Emerging Homogeneous-Heterogeneous Integrated Catalytic Systems in Organic Synthesis.

Qingduan Meng^1,2, Wei Hao^1,2, Yan-Mei He¹

¹Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)

|June 29, 2026

Summary

Integrated catalysis combines homogeneous and heterogeneous catalysts for improved organic synthesis. This approach enhances activity, selectivity, and recoverability, advancing catalysis science and enabling complex molecule synthesis.

Keywords:

asymmetric catalysis heterogeneous catalysis homogeneous catalysis homogeneous‐heterogeneous catalysis organic synthesis

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Area of Science:

Catalysis Science
Organic Synthesis
Materials Science

Background:

Homogeneous and heterogeneous catalysis are core research areas in organic synthesis.
These catalytic regimes historically developed independently, despite complementary strengths.
Integrating homogeneous and heterogeneous catalysis aims to achieve high activity, selectivity, stability, and recoverability.

Purpose of the Study:

To systematically review cutting-edge advances in homogeneous-heterogeneous integrated catalysis.
To explore novel catalytic systems that combine the benefits of both homogeneous and heterogeneous catalysis.
To provide insights into efficient synthesis of challenging substrates and complex chiral compounds.

Main Methods:

Review of recent literature on integrated catalysis.
Categorization of integrated systems into four strategic perspectives: mixed dual, heterogeneous-promoted homogeneous, bifunctional, and switchable systems.
Analysis of representative examples and mechanistic insights.

Main Results:

Homogeneous-heterogeneous integrated catalysis offers a promising strategy to overcome limitations of individual catalytic systems.
Four distinct strategic approaches enable the synergistic combination of homogeneous and heterogeneous catalysts.
Integrated systems demonstrate potential for efficient transformation of challenging substrates and synthesis of complex chiral molecules.

Conclusions:

Integrated catalysis represents a frontier in catalysis science, merging homogeneous and heterogeneous approaches.
This review highlights the potential of integrated systems for advancing organic synthesis.
Future research directions focus on developing robust and versatile integrated catalytic systems.