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Related Concept Videos

Reduction of Alkenes: Catalytic Hydrogenation02:13

Reduction of Alkenes: Catalytic Hydrogenation

13.9K
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...
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Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

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Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
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Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation02:24

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

8.9K
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.
8.9K
Cycloaddition Reactions: MO Requirements for Thermal Activation01:16

Cycloaddition Reactions: MO Requirements for Thermal Activation

4.2K
Thermal cycloadditions are reactions where the source of activation energy needed to initiate the reaction is provided in the form of heat. A typical example of a thermally-allowed cycloaddition is the Diels–Alder reaction, which is a [4 + 2] cycloaddition. In contrast, a [2 + 2] cycloaddition is thermally forbidden.
4.2K
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

3.8K
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...
3.8K
Cycloaddition Reactions: MO Requirements for Photochemical Activation01:12

Cycloaddition Reactions: MO Requirements for Photochemical Activation

2.6K
Some cycloaddition reactions are activated by heat, while others are initiated by light. For example, a [2 + 2] cycloaddition between two ethylene molecules occurs only in the presence of light. It is photochemically allowed but thermally forbidden.
2.6K

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Related Experiment Video

Updated: Jan 12, 2026

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
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CO Adsorption-Induced Deposition: A Facile and Precise Synthesis Route for Core-Shell Catalysts.

Yongmin Kwon1, Kurian A Kuttiyiel2, Kyoung-Hee Kim1

  • 1Hydrogen Fuel Cell Laboratory, Korea Institute of Energy Research (KIER), 152 Gajeong-Ro, Yuseong-Gu, Daejeon 34129, Republic of Korea.

ACS Nano
|November 7, 2025
PubMed
Summary

Carbon monoxide (CO) aids in creating precise core-shell catalysts. This new CO adsorption-induced deposition method synthesizes M@Pt catalysts for efficient oxygen reduction reactions.

Keywords:
carbon monoxidecore−shell structureselectrocatalystsfuel cellsoxygen reduction reaction

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Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks
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Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks
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Area of Science:

  • Materials Science
  • Catalysis
  • Electrochemistry

Background:

  • Carbon monoxide (CO) typically poisons catalysts by strongly adsorbing.
  • Controlled synthesis of core-shell catalysts is crucial for advanced applications.

Purpose of the Study:

  • To develop a facile and precise method for synthesizing M@Pt core-shell catalysts.
  • To investigate the role of CO in catalyst fabrication.
  • To explore the relationship between platinum shell thickness and oxygen reduction reaction (ORR) performance.

Main Methods:

  • CO adsorption-induced deposition (AID) was employed.
  • M@Pt (M = Pd, Au, Ir) core-shell catalysts were synthesized.
  • Pd@Ptn (n = 1, 2, 3) with varying platinum shell layers were fabricated.

Main Results:

  • The CO AID method successfully synthesized M@Pt core-shell catalysts.
  • The method enabled precise control over platinum shell thickness (1-3 layers).
  • CO AID facilitated the reduction of the platinum precursor and formation of a metallic platinum monolayer shell.

Conclusions:

  • CO adsorption-induced deposition is an effective and simple method for synthesizing M@Pt core-shell catalysts.
  • This approach provides a cost-effective route to develop efficient and durable ORR electrocatalysts.
  • The study offers insights into tailoring catalyst structure for improved fuel cell performance.