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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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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.
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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.
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Isolating Single and Few Atoms for Enhanced Catalysis.

Yang Chen1, Jian Lin2, Baohua Jia3

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Summary

Atomically dispersed catalysts, including single-atom catalysts (SACs), dual-atom catalysts (DACs), and atomic clusters, offer high atom efficiency. Engineering their local environments is key to optimizing catalytic performance across various applications.

Keywords:
active sitescatalysisdual-atom catalystsmicroenvironment regulationsingle-atom catalysts

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Area of Science:

  • Materials Science
  • Catalysis Chemistry

Background:

  • Atomically dispersed metal catalysts, such as single-atom catalysts (SACs), dual-atom catalysts (DACs), and atomic clusters, are of significant interest due to their high atom utilization efficiency.
  • Precisely controlling the geometric and electronic structure of these isolated metal centers is crucial for enhancing catalytic properties.

Purpose of the Study:

  • To systematically summarize recent advances in the engineering of local environments for SACs, DACs, and atomic clusters.
  • To highlight synthesis approaches, characterization of local environments, and applications in catalysis.

Main Methods:

  • Review of synthesis strategies for SACs, DACs, and atomic clusters.
  • Elucidation of local environments focusing on electronic states and coordination structures.
  • Compilation of applications in thermocatalysis, electrocatalysis, and photocatalysis.

Main Results:

  • Advances in precisely regulating the local atomic environments of catalysts.
  • Demonstration of enhanced catalytic performance through tailored active sites.
  • Comprehensive overview of state-of-the-art single and few-atom catalysts.

Conclusions:

  • Engineering the microenvironment of active sites is essential for boosting catalytic processes.
  • The review provides insights into challenges and future opportunities in atomically dispersed catalysis.
  • This work aims to guide the rational design of next-generation catalysts.