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Related Concept Videos

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...
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...
Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration02:34

Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration

The rate of acid-catalyzed hydration of alkenes depends on the alkene's structure, as the presence of alkyl substituents at the double bond can significantly influence the rate.

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Related Experiment Video

Updated: May 9, 2026

Solar-Driven Electrochemical Green Fuel Production from CO2 and Water Using Ti3C2Tx MXene-Supported CuZn and NiCo Catalysts
10:15

Solar-Driven Electrochemical Green Fuel Production from CO2 and Water Using Ti3C2Tx MXene-Supported CuZn and NiCo Catalysts

Published on: November 7, 2025

Precisely Constructing Ag1/C3N4 Dual-Site for Highly Efficient Chlorine-Mediated Electrocatalytic Methane

Hehe Qian1,2,3, Tinghui Ma1,3, Yumin Mao1,2

  • 1State Key Laboratory of Soil Pollution Control and Safety, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, P. R. China.

Angewandte Chemie (International Ed. in English)
|May 8, 2026
PubMed
Summary

This study introduces a novel silver single-atom electrocatalyst for converting methane to methyl chloride, achieving high yield and selectivity. The catalyst utilizes electrogenerated chlorine mediators to enable efficient and sustainable methane valorization.

Keywords:
C─H bond activationelectronic structureheterogeneous catalysismethane valorizationsingle‐atom electrocatalysis

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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 Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
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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
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

Area of Science:

  • Electrochemistry
  • Catalysis
  • Materials Science

Background:

  • Electrocatalytic conversion of methane (CH4) to methyl chloride (CH3Cl) presents a sustainable pathway for utilizing inert alkanes.
  • A key challenge lies in balancing initial C-H bond activation with preventing over-dehydrogenation, which is influenced by electrogenerated chlorine (*Cl) mediators.

Purpose of the Study:

  • To develop a novel electrocatalyst for efficient and selective methane chlorination.
  • To investigate the mechanism of *Cl mediator generation and its role in methane activation and conversion.

Main Methods:

  • Fabrication of a silver single-atom electrocatalyst supported on graphitic carbon nitride (Ag1/C3N4).
  • Electrochemical characterization in a flow cell using saturated NaCl solution.
  • Computational modeling (DFT) to elucidate reaction mechanisms and energy barriers.

Main Results:

  • The Ag1/C3N4 catalyst achieved a high CH3Cl yield of 1784.5 mmol g-1 h-1 with 88.0% selectivity at 1.8 V vs. Ag/AgCl.
  • Electrogenerated *Cl mediators were observed to facilitate *Cl generation at the C site of C3N4, enhancing selectivity.
  • Computational analysis revealed a synergistic Ag-N-C-*Cl active site that lowers activation energy for CH4 cleavage and CH3Cl formation, while suppressing over-dehydrogenation.

Conclusions:

  • The Ag1/C3N4 catalyst demonstrates a promising *Cl-mediated dual-site pathway for electrocatalytic methane valorization.
  • This work highlights the potential of mediator-guided active site engineering for inert alkane conversion.
  • The findings offer a sustainable strategy for transforming methane into valuable chemicals.