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Related Concept Videos

Catalysis02:50

Catalysis

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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: Asymmetric Catalytic Hydrogenation02:17

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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...
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Reduction of Alkenes: Catalytic Hydrogenation02:13

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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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Updated: Sep 7, 2025

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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Self-activatable carbon nanotube@ruthenium-catechol coordination complex for hydrogen evolution reaction.

Chenzhi Wu1, Tong Wu1, Zhenbin Tang1

  • 1Fujian Provincial Key Laboratory of Fire Retardant Materials, Xiamen University, Xiamen 361005, People's Republic of China.

Nanotechnology
|June 22, 2022
PubMed
Summary

We developed a novel metal-polymer-carbon composite for efficient hydrogen evolution. This material demonstrates superior performance and stability in alkaline conditions, offering a promising alternative to platinum catalysts.

Keywords:
coordinationcore@shellhydrogen evolution reactionpyrolysis-freeself-activation

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Developing efficient electrocatalysts for hydrogen evolution reaction (HER) is crucial for clean energy technologies.
  • Metal-polymer-carbon composites offer tunable properties for enhanced catalytic activity.
  • Existing methods for composite synthesis can be energy-intensive or complex.

Purpose of the Study:

  • To develop a simple, pyrolysis-free method for synthesizing a metal-polymer-carbon composite for HER.
  • To investigate the electrocatalytic performance of the novel composite in alkaline media.
  • To establish a core-shell structure utilizing metal-catechol coordination on carbon nanotubes.

Main Methods:

  • Synthesized a boronate ester polymer shell on carbon nanotubes (CNTs).
  • Utilized ruthenium ions (Ru3+) to etch the polymer shell and form a ruthenium-catechol complex (TAC-Ru) coating, creating CNT@TAC-Ru.
  • Activated the electrocatalytic properties of CNT@TAC-Ru through electrochemical cycling.

Main Results:

  • The as-activated CNT@TAC-Ru composite exhibited excellent hydrogen evolution reaction (HER) performance.
  • Achieved a low overpotential of 10 mV at 10 mA cm-2 in 1.0 M KOH.
  • Demonstrated superior HER activity compared to commercial Pt/C and desirable long-term stability.

Conclusions:

  • A simple metal ion-catechol coordination strategy effectively created a CNT@TAC-Ru core-shell structure.
  • The developed composite shows high potential for efficient and stable hydrogen production in alkaline electrolytes.
  • This work presents a promising, pyrolysis-free approach for advanced electrocatalyst fabrication.