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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...
Introduction to Mechanisms of Enzyme Catalysis01:13

Introduction to Mechanisms of Enzyme Catalysis

For many years, scientists thought that enzyme-substrate binding took place in a simple "lock-and-key" fashion. This model stated that the enzyme and substrate fit together perfectly in one instantaneous step. However, current research supports a more refined view scientists call induced fit. The induced-fit model expands upon the lock-and-key model by describing a more dynamic interaction between enzyme and substrate. As the enzyme and substrate come together, their interaction causes a mild...
Introduction to Mechanisms of Enzyme Catalysis01:13

Introduction to Mechanisms of Enzyme Catalysis

For many years, scientists thought that enzyme-substrate binding took place in a simple "lock-and-key" fashion. This model stated that the enzyme and substrate fit together perfectly in one instantaneous step. However, current research supports a more refined view scientists call induced fit. The induced-fit model expands upon the lock-and-key model by describing a more dynamic interaction between enzyme and substrate. As the enzyme and substrate come together, their interaction causes a mild...
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...
Catalytically Perfect Enzymes01:07

Catalytically Perfect Enzymes

The theory of catalytically perfect enzymes was first proposed by W.J. Albery and J. R. Knowles in 1976. These enzymes catalyze biochemical reactions at high-speed. Their catalytic efficiency values range from 108-109 M-1s-1. These enzymes are also called 'diffusion-controlled' as the only rate-limiting step in the catalysis is that of the substrate diffusion into the active site. Examples include triose phosphate isomerase, fumarase, and superoxide dismutase.

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Related Experiment Video

Updated: May 22, 2026

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks (MOFs)
08:25

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

Published on: January 17, 2020

A Zeolite-MOF Synergy: Multi-Shell Nanoreactors for Tandem Catalysis.

Yanjing Gao1, Guangrui Chen1,2, Mingkun Gao1,2

  • 1State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, P. R. China.

Journal of the American Chemical Society
|May 21, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed a new method to create advanced zeolite and metal-organic framework (MOF) composites. This breakthrough enables the design of novel hollow multi-shell catalysts for enhanced chemical reactions, particularly in biofuel production.

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Discovery and Synthesis Optimization of Isoreticular Al(III) Phosphonate-Based Metal-Organic Framework Compounds Using High-Throughput Methods

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Last Updated: May 22, 2026

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks (MOFs)
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Published on: January 17, 2020

Synthesis of Zeolites Using the ADOR (Assembly-Disassembly-Organization-Reassembly) Route
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Discovery and Synthesis Optimization of Isoreticular Al(III) Phosphonate-Based Metal-Organic Framework Compounds Using High-Throughput Methods

Published on: October 6, 2023

Area of Science:

  • Materials Science
  • Nanotechnology
  • Catalysis

Background:

  • Zeolites and metal-organic frameworks (MOFs) are distinct nanoporous materials with unique properties.
  • Integrating zeolites and MOFs into unified composites is challenging due to differing synthesis conditions and lattice mismatches.
  • Achieving synergistic properties requires overcoming integration challenges to combine structural, compositional, and functional advantages.

Purpose of the Study:

  • To develop a novel synthetic strategy for creating hierarchical zeolite@MOF composites.
  • To engineer well-defined heterogeneous hollow multi-shell architectures.
  • To enable precise control over composite properties for advanced catalytic applications.

Main Methods:

  • A growth-kinetics-mediated cascade assembly strategy was employed.
  • Metastable layers were constructed as removable nanolinkers to regulate MOF growth on zeolite surfaces.
  • Selective etching with acetic acid was used to integrate shells and form interlayer voids, creating hollow multi-shell structures.

Main Results:

  • Hierarchically porous zeolite@MOF composites with controlled hollow multi-shell architectures were successfully synthesized.
  • The method allows dynamic regulation of mesopore size, shell sequence, particle size, and shell thickness.
  • The strategy is versatile and can be extended to various zeolite cores and MOF shells.

Conclusions:

  • A powerful synthetic methodology for zeolite@MOF composites with controllable hollow multi-shell architectures was demonstrated.
  • The bifunctional catalysts exhibit enhanced activity and selectivity in reductive etherification, relevant for biofuel additives.
  • This work offers new insights into designing multicomponent crystalline nanoporous catalysts for complex heterogeneous catalysis.