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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...
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...
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

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...
Reduction of Alkenes: Catalytic Hydrogenation02:13

Reduction of Alkenes: Catalytic Hydrogenation

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 surface of...
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation02:24

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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Related Experiment Video

Updated: May 16, 2026

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
08:40

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

Work function-regulated two-dimensional porous C7N6-based single-atom catalysts for the hydrogen evolution reaction.

Wenli Xie1, Bin Cui2, Desheng Liu2

  • 1School of Materials Science and Engineering, Guangdong Ocean University, Yangjiang 529500, China.

Physical Chemistry Chemical Physics : PCCP
|May 14, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel single-atom catalyst using a C7N6 substrate for efficient hydrogen evolution. This breakthrough offers a new framework for designing cost-effective electrocatalysts for renewable energy applications.

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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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Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation
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Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation

Published on: July 18, 2017

Area of Science:

  • Materials Science
  • Catalysis
  • Renewable Energy

Background:

  • Platinum catalysts are expensive, hindering renewable energy development.
  • Efficient and low-cost electrocatalysts for the hydrogen evolution reaction (HER) are crucial.
  • Developing alternative catalysts is a key challenge.

Purpose of the Study:

  • To design and evaluate a novel single-atom catalyst (SAC) for the hydrogen evolution reaction (HER).
  • To explore the catalytic performance of various transition metal (TM) centers anchored on a C7N6 substrate.
  • To establish a theoretical framework for designing efficient, low-cost electrocatalysts.

Main Methods:

  • A single-atom catalyst (SAC) was constructed using a C7N6 monolayer substrate.
  • Transition metal (TM) atoms were anchored via unsaturated nitrogen atoms.
  • The catalytic performance of 20 TM centers was computationally evaluated.

Main Results:

  • Partial d-orbital occupancy was found to enable near-thermoneutral hydrogen evolution.
  • A linear correlation was identified between the support's work function and catalytic activity.
  • The C7N6 substrate effectively anchors TM atoms for catalysis.

Conclusions:

  • The study provides a theoretical framework for tuning the electronic structure of catalytic materials.
  • This research guides the efficient design and screening of low-cost supported electrocatalysts.
  • The developed SAC shows promise for cost-effective hydrogen production.