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Related Concept Videos

Heterogeneous Catalysis01:22

Heterogeneous Catalysis

74
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...
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Ziegler–Natta Chain-Growth Polymerization: Overview01:17

Ziegler–Natta Chain-Growth Polymerization: Overview

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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...
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Catalysis02:50

Catalysis

31.8K
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.
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Reduction of Alkenes: Catalytic Hydrogenation02:13

Reduction of Alkenes: Catalytic Hydrogenation

14.7K
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
14.7K
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

4.0K
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...
4.0K
Sharpless Epoxidation02:57

Sharpless Epoxidation

5.3K
The conversion of allylic alcohols into epoxides using the chiral catalyst was discovered by K. Barry Sharpless and is known as Sharpless epoxidation. The use of a chiral catalyst enables the formation of one enantiomer of the product in excess. This chiral catalyst is mainly a chiral complex of titanium tetraisopropoxide and tartrate ester (specific stereoisomer). The stereoisomer used in the chiral catalyst dictates the formation of the enantiomer of the product. In other words, the use of...
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Related Experiment Video

Updated: Mar 18, 2026

Synthesis of Zeolites Using the ADOR Assembly-Disassembly-Organization-Reassembly Route
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Challenges and Opportunities in Core-Shell Zeolite Catalysts.

Runhui Zhou1, Wei Liu1, Zhaoyang Lin1

  • 1Engineering Research Center of Advanced Rare-Earth Materials of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, China.

ACS Materials Au
|March 16, 2026
PubMed
Summary

Core-shell zeolites offer unique catalytic properties due to their structured design. This review details their synthesis, characterization, and applications, highlighting advantages over conventional zeolite catalysts.

Keywords:
characterization of zeolite materialscore−shell architecture fabricationcore−shell structureepitaxial growthproduct distribution modulationsurface coatingtandem catalytic processesthermal catalysis

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Adsorption Device Based on a Langatate Crystal Microbalance for High Temperature High Pressure Gas Adsorption in Zeolite H-ZSM-5
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Area of Science:

  • Materials Science
  • Catalysis
  • Nanotechnology

Background:

  • Core-shell zeolites exhibit distinct catalytic properties compared to conventional single-component zeolites.
  • Their unique structure influences stability, mass transport, and product distribution.
  • Synthesizing and characterizing these complex materials presents significant challenges.

Purpose of the Study:

  • To provide a comprehensive overview of synthesis methodologies for core-shell zeolite materials.
  • To compare the advantages and limitations of various synthesis approaches.
  • To summarize characterization techniques for elucidating core-shell structures.

Main Methods:

  • Review of existing literature on core-shell zeolite synthesis.
  • Comparative analysis of different synthesis strategies.
  • Summary of advanced characterization techniques (e.g., electron microscopy, spectroscopy).

Main Results:

  • Detailed comparison of synthesis routes, including their pros and cons.
  • Elucidation of structural features using various characterization methods.
  • Identification of challenges in precise construction and characterization.

Conclusions:

  • Core-shell zeolites offer significant potential for advanced catalysis.
  • Further development in synthesis and characterization is needed to unlock their full capabilities.
  • Emerging applications and opportunities are highlighted in contrast to conventional zeolites.